v8.0.0

Adds two new classes:
- Service: long-running component with start/stop lifecycle, health checks, builder pattern and subclass support
- ServiceManager: orchestrates multiple services with dependency-ordered startup, failure isolation, retry with backoff, and reverse-order shutdown

.serena/memories/code_style_conventions.md

@@ -1,35 +0,0 @@
-# Code Style and Conventions for TaskBuffer
-
-## File Structure
-- Source code in `ts/` directory
-- Tests in `test/` directory
-- Compiled output in `dist_ts/`
-- All filenames must be lowercase
-
-## Naming Conventions
-- **Interfaces**: Prefix with `I` (e.g., `ITaskFunction`)
-- **Types**: Prefix with `T` (e.g., `TPreOrAfterTaskFunction`)
-- **Classes**: PascalCase (e.g., `TaskManager`)
-- **Files**: `taskbuffer.classes.{classname}.ts` pattern
-- **Test files**: `test.{number}.{feature}.ts` pattern
-
-## TypeScript Conventions
-- Use ES modules (import/export)
-- Avoid ENums when possible
-- Import dependencies through `plugins.ts`
-- Reference with full path: `plugins.myModule.myClass()`
-- Use async/await patterns consistently
-- Strong typing throughout
-
-## Testing Conventions
-- Import expect from `@git.zone/tstest/tapbundle`
-- Test files end with `export default tap.start()`
-- Use descriptive test names with tap.test()
-- Test both browser and node when applicable
-
-## Code Quality
-- Make focused, goal-oriented changes
-- Preserve necessary complexity
-- Keep code elegant and maintainable
-- No inline documentation unless requested
-- Complete implementations only (no partial work)

.serena/memories/project_overview.md

@@ -1,27 +0,0 @@
-# TaskBuffer Project Overview
-
-## Purpose
-@push.rocks/taskbuffer is a powerful TypeScript-first task management library for orchestrating asynchronous operations. It provides flexible task execution patterns including buffered execution, task chains, parallel execution, scheduling, debouncing, and one-time execution.
-
-## Tech Stack
-- **Language**: TypeScript (ES modules)
-- **Runtime**: Node.js
-- **Build Tool**: tsbuild, tsbundle
-- **Test Framework**: @git.zone/tstest (tapbundle)
-- **Package Manager**: pnpm
-- **Module System**: ES modules (type: "module")
-
-## Key Features
-- Task: Basic unit of work with async function wrapping
-- Taskchain: Sequential task execution with result passing
-- Taskparallel: Parallel task execution
-- TaskManager: Cron-based task scheduling
-- TaskDebounced: Debounced execution pattern
-- TaskOnce: Singleton execution pattern
-- TaskRunner: Distributed task execution
-- BufferRunner: Smart concurrent execution control
-
-## Main Entry Points
-- Main export: `ts/index.ts`
-- Compiled output: `dist_ts/index.js`
-- All classes exported from index for clean API

.serena/memories/suggested_commands.md

@@ -1,67 +0,0 @@
-# Suggested Commands for TaskBuffer Development
-
-## Build and Test Commands
-```bash
-# Build the project
-pnpm run build
-
-# Run tests
-pnpm test
-
-# Type checking
-tsbuild check test/**/* --skiplibcheck
-
-# Build documentation
-pnpm run buildDocs
-```
-
-## Development Workflow
-```bash
-# Install dependencies
-pnpm install
-
-# Add development dependency
-pnpm install --save-dev <package>
-
-# Add production dependency
-pnpm add <package>
-
-# Run specific test
-tstest test/test.some.ts --verbose
-
-# Run tests with logging
-tstest test/test.some.ts --logfile
-```
-
-## Git Commands
-```bash
-# View status
-git status
-
-# Stage changes
-git add .
-
-# Commit with message
-git commit -m "message"
-
-# Use git mv for file operations to preserve history
-git mv oldfile newfile
-```
-
-## System Commands (Linux)
-```bash
-# List files
-ls -la
-
-# Find files
-find . -name "*.ts"
-
-# Search in files
-rg "pattern"  # Use ripgrep instead of grep
-
-# View file
-cat filename
-
-# Create directory
-mkdir -p path/to/dir
-```

.serena/memories/task_completion_checklist.md

@@ -1,37 +0,0 @@
-# Task Completion Checklist for TaskBuffer
-
-## Before Marking Any Task Complete
-
-### 1. Code Quality Checks
-- [ ] Run build to ensure TypeScript compiles: `pnpm run build`
-- [ ] Run tests to ensure nothing breaks: `pnpm test`
-- [ ] Type check test files: `tsbuild check test/**/* --skiplibcheck`
-
-### 2. Code Review
-- [ ] All changes are focused and purposeful
-- [ ] No unnecessary modifications made
-- [ ] Code follows project naming conventions
-- [ ] Imports use the plugins.ts pattern where applicable
-- [ ] All async operations use proper async/await
-
-### 3. Testing
-- [ ] New features have corresponding tests
-- [ ] Existing tests still pass
-- [ ] Test files end with `export default tap.start()`
-- [ ] Tests use proper expect from tapbundle
-
-### 4. Documentation
-- [ ] readme.md updated if new features added
-- [ ] Code is self-explanatory (no comments unless requested)
-- [ ] API changes documented
-
-### 5. Git Hygiene
-- [ ] Changes are staged appropriately
-- [ ] Commit message is clear and focused
-- [ ] NO commits made without explicit user approval
-
-## Common Issues to Check
-- No uppercase filenames
-- No direct npm usage (use pnpm)
-- No guessing APIs (always check documentation)
-- No partial implementations

.serena/project.yml

@@ -1,68 +0,0 @@
-# language of the project (csharp, python, rust, java, typescript, go, cpp, or ruby)
-#  * For C, use cpp
-#  * For JavaScript, use typescript
-# Special requirements:
-#  * csharp: Requires the presence of a .sln file in the project folder.
-language: typescript
-
-# whether to use the project's gitignore file to ignore files
-# Added on 2025-04-07
-ignore_all_files_in_gitignore: true
-# list of additional paths to ignore
-# same syntax as gitignore, so you can use * and **
-# Was previously called `ignored_dirs`, please update your config if you are using that.
-# Added (renamed) on 2025-04-07
-ignored_paths: []
-
-# whether the project is in read-only mode
-# If set to true, all editing tools will be disabled and attempts to use them will result in an error
-# Added on 2025-04-18
-read_only: false
-
-
-# list of tool names to exclude. We recommend not excluding any tools, see the readme for more details.
-# Below is the complete list of tools for convenience.
-# To make sure you have the latest list of tools, and to view their descriptions, 
-# execute `uv run scripts/print_tool_overview.py`.
-#
-#  * `activate_project`: Activates a project by name.
-#  * `check_onboarding_performed`: Checks whether project onboarding was already performed.
-#  * `create_text_file`: Creates/overwrites a file in the project directory.
-#  * `delete_lines`: Deletes a range of lines within a file.
-#  * `delete_memory`: Deletes a memory from Serena's project-specific memory store.
-#  * `execute_shell_command`: Executes a shell command.
-#  * `find_referencing_code_snippets`: Finds code snippets in which the symbol at the given location is referenced.
-#  * `find_referencing_symbols`: Finds symbols that reference the symbol at the given location (optionally filtered by type).
-#  * `find_symbol`: Performs a global (or local) search for symbols with/containing a given name/substring (optionally filtered by type).
-#  * `get_current_config`: Prints the current configuration of the agent, including the active and available projects, tools, contexts, and modes.
-#  * `get_symbols_overview`: Gets an overview of the top-level symbols defined in a given file.
-#  * `initial_instructions`: Gets the initial instructions for the current project.
-#     Should only be used in settings where the system prompt cannot be set,
-#     e.g. in clients you have no control over, like Claude Desktop.
-#  * `insert_after_symbol`: Inserts content after the end of the definition of a given symbol.
-#  * `insert_at_line`: Inserts content at a given line in a file.
-#  * `insert_before_symbol`: Inserts content before the beginning of the definition of a given symbol.
-#  * `list_dir`: Lists files and directories in the given directory (optionally with recursion).
-#  * `list_memories`: Lists memories in Serena's project-specific memory store.
-#  * `onboarding`: Performs onboarding (identifying the project structure and essential tasks, e.g. for testing or building).
-#  * `prepare_for_new_conversation`: Provides instructions for preparing for a new conversation (in order to continue with the necessary context).
-#  * `read_file`: Reads a file within the project directory.
-#  * `read_memory`: Reads the memory with the given name from Serena's project-specific memory store.
-#  * `remove_project`: Removes a project from the Serena configuration.
-#  * `replace_lines`: Replaces a range of lines within a file with new content.
-#  * `replace_symbol_body`: Replaces the full definition of a symbol.
-#  * `restart_language_server`: Restarts the language server, may be necessary when edits not through Serena happen.
-#  * `search_for_pattern`: Performs a search for a pattern in the project.
-#  * `summarize_changes`: Provides instructions for summarizing the changes made to the codebase.
-#  * `switch_modes`: Activates modes by providing a list of their names
-#  * `think_about_collected_information`: Thinking tool for pondering the completeness of collected information.
-#  * `think_about_task_adherence`: Thinking tool for determining whether the agent is still on track with the current task.
-#  * `think_about_whether_you_are_done`: Thinking tool for determining whether the task is truly completed.
-#  * `write_memory`: Writes a named memory (for future reference) to Serena's project-specific memory store.
-excluded_tools: []
-
-# initial prompt for the project. It will always be given to the LLM upon activating the project
-# (contrary to the memories, which are loaded on demand).
-initial_prompt: ""
-
-project_name: "taskbuffer"

changelog.md

@@ -1,5 +1,138 @@
 # Changelog
 
+## 2026-03-20 - 8.0.0 - BREAKING CHANGE(service)
+expand service lifecycle management with instance-aware hooks, startup timeouts, labels, readiness waits, and auto-restart support
+
+- Change service stop and health check callbacks to receive the started instance and expose it via service.instance
+- Add per-service and global startup timeout handling plus waitForState, waitForRunning, and waitForStopped readiness helpers
+- Support service labels, label-based manager queries, and auto-restart lifecycle events with configurable backoff
+
+## 2026-02-15 - 6.1.2 - fix(deps)
+bump @push.rocks/smarttime to ^4.2.3
+
+- Updated @push.rocks/smarttime from ^4.1.1 to ^4.2.3
+- Non-breaking dependency version bump; increment patch version
+
+## 2026-02-15 - 6.1.1 - fix(tests)
+improve buffered task tests: add chain, concurrency and queue behavior tests
+
+- Replace tools.delayFor with @push.rocks/smartdelay for more deterministic timing in tests
+- Add tests for afterTask chaining, bufferMax concurrency, queued-run limits, and re-trigger behavior
+- Rename tasks to descriptive names and fix afterTask chaining order to avoid circular references
+- Change test runner invocation to export default tap.start() instead of calling tap.start() directly
+
+## 2026-02-15 - 6.1.0 - feat(taskbuffer)
+add sliding-window rate limiting and result-sharing to TaskConstraintGroup and integrate with TaskManager
+
+- Added IRateLimitConfig and TResultSharingMode types and exported them from the public index
+- TaskConstraintGroup: added rateLimit and resultSharingMode options, internal completion timestamp tracking, and last-result storage
+- TaskConstraintGroup: new helpers - pruneCompletionTimestamps, getRateLimitDelay, getNextAvailableDelay, recordResult, getLastResult, hasResultSharing
+- TaskConstraintGroup: rate-limit logic enforces maxPerWindow (counts running + completions) and composes with cooldown/maxConcurrent
+- TaskManager: records successful task results to constraint groups and resolves queued entries immediately when a shared result exists
+- TaskManager: queue drain now considers unified next-available delay (cooldown + rate limit) when scheduling retries
+- Documentation updated: README and hints with usage examples for sliding-window rate limiting and result sharing
+- Comprehensive tests added for rate limiting, concurrency interaction, and result-sharing behavior
+
+## 2026-02-15 - 6.0.1 - fix(taskbuffer)
+no changes to commit
+
+- Git diff shows no changes
+- package.json current version is 6.0.0; no version bump required
+
+## 2026-02-15 - 6.0.0 - BREAKING CHANGE(constraints)
+make TaskConstraintGroup constraint matcher input-aware and add shouldExecute pre-execution hook
+
+- Rename ITaskConstraintGroupOptions.constraintKeyForTask -> constraintKeyForExecution(task, input?) and update TaskConstraintGroup.getConstraintKey signature
+- Add optional shouldExecute(task, input?) hook; TaskManager checks shouldExecute before immediate runs, after acquiring slots, and when draining the constraint queue (queued tasks are skipped when shouldExecute returns false)
+- Export ITaskExecution type and store constraintKeys on queued entries (IConstrainedTaskEntry.constraintKeys)
+- Documentation and tests updated to demonstrate input-aware constraint keys and shouldExecute pruning
+
+## 2026-02-15 - 5.0.1 - fix(tests)
+add and tighten constraint-related tests covering return values, error propagation, concurrency, cooldown timing, and constraint removal
+
+- Tightened cooldown timing assertion from >=100ms to >=250ms to reflect 300ms cooldown with 50ms tolerance.
+- Added tests for queued task return values, error propagation when catchErrors is false, and error swallowing behavior when catchErrors is true.
+- Added concurrency and cooldown interaction tests to ensure maxConcurrent is respected and batch timing is correct.
+- Added test verifying removing a constraint group unblocks queued tasks and drain behavior completes correctly.
+
+## 2026-02-15 - 5.0.0 - BREAKING CHANGE(taskbuffer)
+Introduce constraint-based concurrency with TaskConstraintGroup and TaskManager integration; remove legacy TaskRunner and several Task APIs (breaking); add typed Task.data and update exports and tests.
+
+- Add TaskConstraintGroup class with per-key maxConcurrent, cooldownMs, and helper methods (canRun, acquireSlot, releaseSlot, getCooldownRemaining, getRunningCount, reset).
+- Task generic signature extended to Task<T, TSteps, TData> and a new typed data property (data) with default {}.
+- TaskManager now supports addConstraintGroup/removeConstraintGroup, triggerTaskConstrained, queues blocked tasks, drains queue with cooldown timers, and routes triggerTask/triggerTaskByName through the constraint system.
+- Removed TaskRunner, plus Task APIs: blockingTasks, execDelay, finished promise and associated behavior have been removed (breaking changes).
+- Exports and interfaces updated: TaskConstraintGroup and ITaskConstraintGroupOptions added; TaskRunner removed from public API.
+- Updated README and added comprehensive tests for constraint behavior; adjusted other tests to remove TaskRunner usage and reflect new APIs.
+
+## 2026-02-15 - 4.2.1 - fix(deps)
+bump @push.rocks/smartlog and @types/node; update dependency list version and license link in docs
+
+- package.json: update @push.rocks/smartlog from ^3.1.10 to ^3.1.11
+- package.json: update @types/node from ^25.1.0 to ^25.2.3
+- readme.hints.md: update 'Dependencies (as of v4.1.1)' to 'Dependencies (as of v4.2.0)' and reflect bumped dependency versions
+- readme.md: change license link text to '[LICENSE](./license.md)'
+
+## 2026-01-29 - 4.2.0 - feat(ts_web)
+support TC39 'accessor' decorators for web components; bump dependencies and devDependencies; rename browser tests to .chromium.ts; move LICENSE to license.md and update readme
+
+- Convert web component class fields to use the TC39 'accessor' keyword in ts_web/taskbuffer-dashboard.ts to be compatible with @design.estate/dees-element v2.1.6
+- Bump @design.estate/dees-element to ^2.1.6 and update devDependencies (@git.zone/tsbuild, @git.zone/tsbundle, @git.zone/tsrun, @git.zone/tstest, @types/node) to newer versions
+- Replace test/test.10.webcomponent.browser.ts with test/test.10.webcomponent.chromium.ts and update testing guidance in readme.hints.md to prefer .chromium.ts
+- Move LICENSE file content to license.md and update readme.md to reference the new license file
+- Small test cleanups: remove obsolete tslint:disable comments
+
+## 2026-01-26 - 4.1.1 - fix(ts_web)
+fix web dashboard typings and update generated commit info
+
+- Updated generated commit info file ts_web/00_commitinfo_data.ts to version 4.1.0
+- Large changes applied to web/TS build files (net +529 additions, -399 deletions) — likely fixes and typing/refactor improvements in ts_web/dashboard
+- package.json remains at 4.1.0; recommend a patch bump to 4.1.1 for these fixes
+
+## 2026-01-26 - 4.1.0 - feat(task)
+add task labels and push-based task events
+
+- Introduce Task labels: Task accepts labels in constructor and exposes setLabel/getLabel/removeLabel/hasLabel; labels are included (shallow copy) in getMetadata().
+- Add push-based events: Task.eventSubject (rxjs Subject<ITaskEvent>) emits 'started','step','completed','failed' with timestamp; 'step' includes stepName and 'failed' includes error string.
+- Task now emits events during lifecycle: emits 'started' at run start, 'step' on notifyStep, and 'completed' or 'failed' when finished or errored. getMetadata() now includes labels.
+- TaskManager aggregates task events into taskSubject, subscribes on addTask and unsubscribes on removeTask/stop; includes helper methods getTasksByLabel and getTasksMetadataByLabel.
+- Public API updated: exported ITaskEvent and TTaskEventType in ts/index.ts and interfaces updated (labels in metadata, new event types).
+- Tests and docs: added test/test.12.labels-and-events.ts and updated readme.hints.md to document labels and push-based events.
+
+## 2026-01-25 - 4.0.0 - BREAKING CHANGE(taskbuffer)
+Change default Task error handling: trigger() now rejects when taskFunction throws; add catchErrors option (default false) to preserve previous swallow behavior; track errors (lastError, errorCount) and expose them in metadata; improve error propagation and logging across runners, chains, parallels and debounced tasks; add tests and documentation for new behavior.
+
+- Introduce catchErrors option on Task (default: false) — previously errors were swallowed by default
+- Tasks now set lastError and increment errorCount when failures occur; clearError() added to reset error state
+- getMetadata() now reports status 'failed' and includes lastError and errorCount
+- Task.run flow updated to reset error state at start, log errors, and either swallow or rethrow based on catchErrors
+- BufferRunner, TaskRunner, Taskchain, Taskparallel, TaskDebounced and TaskManager updated to handle errors, avoid hanging promises, and use logger instead of console
+- Added comprehensive tests (test/test.11.errorhandling.ts) and readme hints documenting the new error-handling behavior (v3.6.0+)
+- npmextra.json updated for @git.zone/cli and release registries
+
+## 2025-12-04 - 3.5.0 - feat(core)
+Add debounced tasks and step-based progress tracking; upgrade deps and improve dashboard and scheduling
+
+- Add TaskDebounced class to coalesce rapid triggers into a single execution (debounce behavior).
+- Introduce step tracking and progress reporting on Task via TaskStep, getProgress(), getStepsMetadata(), getMetadata(), resetSteps(), and completeAllSteps().
+- Enhance buffered execution flow: BufferRunner and CycleCounter improvements to better coordinate buffered runs and cycle promises.
+- Standardize concurrent runner naming (Taskparallel) and update related exports/usages (ts/index.ts, readme examples).
+- Enhance TaskManager scheduling/metadata: getScheduledTasks now returns schedule and nextRun, addExecuteRemoveTask collects execution report metadata and cleans up after execution, distributed coordination hooks retained.
+- Add/upgrade web dashboard UI, demos and refresh logic to surface task metadata, scheduled tasks and progress.
+- Bump runtime and dev dependencies (multiple @push.rocks packages and @git.zone tooling).
+- Update tests: reduce iteration threshold and tighten schedule interval in test/test.4.taskmanager.ts.
+- Remove several .serena memory files (project overview, style guides and suggested commands) as cleanup.
+
+## 2025-09-07 - 3.4.0 - feat(taskbuffer-dashboard)
+Add TaskBuffer dashboard web component, demo and browser tests; add HTML entry and update dependencies
+
+- Introduce a new web component taskbuffer-dashboard for real-time visualization of tasks and schedules (ts_web/taskbuffer-dashboard.ts).
+- Add a demo wrapper and interactive UI for the dashboard (ts_web/elements/taskbuffer-dashboard.demo.ts).
+- Provide web exports and typings for web usage (ts_web/index.ts) and include an HTML entry (html/index.html).
+- Add browser-oriented tests to validate metadata structures for the web component (test/test.10.webcomponent.browser.ts).
+- Bump package version to 3.3.0 in package.json as part of this change.
+- Update/add dependencies and devDependencies (@design.estate/dees-element added; smartlog, @git.zone/tsbuild and @git.zone/tstest bumped).
+
 ## 2025-09-06 - 3.2.0 - feat(core)
 Add step-based progress tracking, task metadata and enhanced TaskManager scheduling/metadata APIs
 

html/index.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta
+      name="viewport"
+      content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height"
+    />
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+
+    <style>
+      body {
+        margin: 0px;
+        background: #222222;
+      }
+    </style>
+
+    <script type="module" src="/bundle.js"></script>
+  </head>
+  <body>
+  </body>
+</html>

license.md

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016 Push.Rocks
+Copyright (c) 2016 Task Venture Capital GmbH <hello@task.vc>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

npmextra.json

@@ -1,10 +1,5 @@
 {
-  "npmci": {
-    "npmGlobalTools": [],
-    "npmAccessLevel": "public",
-    "npmRegistryUrl": "registry.npmjs.org"
-  },
-  "gitzone": {
+  "@git.zone/cli": {
     "projectType": "npm",
     "module": {
       "githost": "code.foss.global",
@@ -25,9 +20,20 @@
         "debounced tasks",
         "distributed coordination"
       ]
+    },
+    "release": {
+      "registries": [
+        "https://verdaccio.lossless.digital",
+        "https://registry.npmjs.org"
+      ],
+      "accessLevel": "public"
     }
   },
-  "tsdoc": {
+  "@git.zone/tsdoc": {
     "legal": "\n## License and Legal Information\n\nThis repository contains open-source code that is licensed under the MIT License. A copy of the MIT License can be found in the [license](license) file within this repository. \n\n**Please note:** The MIT License does not grant permission to use the trade names, trademarks, service marks, or product names of the project, except as required for reasonable and customary use in describing the origin of the work and reproducing the content of the NOTICE file.\n\n### Trademarks\n\nThis project is owned and maintained by Task Venture Capital GmbH. The names and logos associated with Task Venture Capital GmbH and any related products or services are trademarks of Task Venture Capital GmbH and are not included within the scope of the MIT license granted herein. Use of these trademarks must comply with Task Venture Capital GmbH's Trademark Guidelines, and any usage must be approved in writing by Task Venture Capital GmbH.\n\n### Company Information\n\nTask Venture Capital GmbH  \nRegistered at District court Bremen HRB 35230 HB, Germany\n\nFor any legal inquiries or if you require further information, please contact us via email at hello@task.vc.\n\nBy using this repository, you acknowledge that you have read this section, agree to comply with its terms, and understand that the licensing of the code does not imply endorsement by Task Venture Capital GmbH of any derivative works.\n"
+  },
+  "@ship.zone/szci": {
+    "npmGlobalTools": [],
+    "npmRegistryUrl": "registry.npmjs.org"
   }
-}
+}

package.json

@@ -1,13 +1,13 @@
 {
   "name": "@push.rocks/taskbuffer",
-  "version": "3.2.0",
+  "version": "8.0.0",
   "private": false,
   "description": "A flexible task management library supporting TypeScript, allowing for task buffering, scheduling, and execution with dependency management.",
   "main": "dist_ts/index.js",
   "typings": "dist_ts/index.d.ts",
   "type": "module",
   "scripts": {
-    "test": "(tstest test/ --verbose --logfile --timeout 120)",
+    "test": "(tstest test/ --verbose --logfile --timeout 300)",
     "build": "(tsbuild tsfolders)",
     "buildDocs": "tsdoc"
   },
@@ -27,27 +27,28 @@
     "debounced tasks",
     "distributed coordination"
   ],
-  "author": "Lossless GmbH",
+  "author": "Task Venture Capital GmbH <hello@task.vc>",
   "license": "MIT",
   "bugs": {
     "url": "https://code.foss.global/push.rocks/taskbuffer/issues"
   },
   "homepage": "https://code.foss.global/push.rocks/taskbuffer#readme",
   "dependencies": {
-    "@push.rocks/lik": "^6.0.5",
+    "@design.estate/dees-element": "^2.2.3",
+    "@push.rocks/lik": "^6.3.1",
     "@push.rocks/smartdelay": "^3.0.5",
-    "@push.rocks/smartlog": "^3.0.3",
-    "@push.rocks/smartpromise": "^4.0.3",
-    "@push.rocks/smartrx": "^3.0.6",
-    "@push.rocks/smarttime": "^4.0.6",
-    "@push.rocks/smartunique": "^3.0.6"
+    "@push.rocks/smartlog": "^3.2.1",
+    "@push.rocks/smartpromise": "^4.2.3",
+    "@push.rocks/smartrx": "^3.0.10",
+    "@push.rocks/smarttime": "^4.2.3",
+    "@push.rocks/smartunique": "^3.0.9"
   },
   "devDependencies": {
-    "@git.zone/tsbuild": "^2.1.66",
-    "@git.zone/tsbundle": "^2.0.8",
-    "@git.zone/tsrun": "^1.2.44",
-    "@git.zone/tstest": "^2.3.5",
-    "@types/node": "^20.8.7"
+    "@git.zone/tsbuild": "^4.3.0",
+    "@git.zone/tsbundle": "^2.9.1",
+    "@git.zone/tsrun": "^2.0.1",
+    "@git.zone/tstest": "^3.5.0",
+    "@types/node": "^25.5.0"
   },
   "files": [
     "ts/**/*",

readme.hints.md

@@ -1 +1,138 @@
- 
+# Taskbuffer Hints
+
+## Task Constraint System (v5.0.0+) — Breaking Changes
+- **`TaskRunner` removed** — replaced by `TaskManager` + `TaskConstraintGroup`
+- **`blockingTasks` removed** from `Task` — use `TaskConstraintGroup` with `maxConcurrent: 1`
+- **`execDelay` removed** from `Task` — use `TaskConstraintGroup` with `cooldownMs`
+- **`finished` promise removed** from `Task` — no longer needed
+- **`Task` generic signature**: `Task<T, TSteps, TData>` (3rd param added for typed data)
+
+### Task.data
+- `Task` constructor accepts optional `data?: TData` (defaults to `{}`)
+- Typed data bag accessible as `task.data`
+
+### TaskConstraintGroup
+- `new TaskConstraintGroup<TData>({ name, constraintKeyForExecution, maxConcurrent?, cooldownMs?, shouldExecute?, rateLimit?, resultSharingMode? })`
+- `constraintKeyForExecution(task, input?)` returns a string key (constraint applies) or `null` (skip). Receives both task and runtime input.
+- `shouldExecute(task, input?)` — optional pre-execution check. Returns `false` to skip (deferred resolves `undefined`). Can be async.
+- `maxConcurrent` (default: `Infinity`) — max concurrent tasks per key
+- `cooldownMs` (default: `0`) — minimum ms gap between completions per key
+- `rateLimit` (optional) — `{ maxPerWindow: number, windowMs: number }` sliding window rate limiter. Counts both running + completed tasks in window.
+- `resultSharingMode` (default: `'none'`) — `'none'` | `'share-latest'`. When `'share-latest'`, queued tasks for the same key resolve with the first task's result without executing.
+- Methods: `getConstraintKey(task, input?)`, `checkShouldExecute(task, input?)`, `canRun(key)`, `acquireSlot(key)`, `releaseSlot(key)`, `getCooldownRemaining(key)`, `getRateLimitDelay(key)`, `getNextAvailableDelay(key)`, `getRunningCount(key)`, `recordResult(key, result)`, `getLastResult(key)`, `hasResultSharing()`, `reset()`
+- `ITaskExecution<TData>` type exported from index — `{ task, input }` tuple
+
+### Rate Limiting (v6.1.0+)
+- Sliding window rate limiter: `rateLimit: { maxPerWindow: N, windowMs: ms }`
+- Counts running + completed tasks against the window cap
+- Per-key independence: saturating key A doesn't block key B
+- Composable with `maxConcurrent` and `cooldownMs`
+- `getNextAvailableDelay(key)` returns `Math.max(cooldownRemaining, rateLimitDelay)` — unified "how long until I can run" answer
+- Drain timer auto-schedules based on shortest delay across all constraints
+
+### Result Sharing (v6.1.0+)
+- `resultSharingMode: 'share-latest'` — queued tasks for the same key get the first task's result without executing
+- Only successful results are shared (errors from `catchErrors: true` or thrown errors are NOT shared)
+- `shouldExecute` is NOT called for shared results (the task's purpose was already fulfilled)
+- `lastResults` persists until `reset()` — for time-bounded sharing, use `shouldExecute` to control staleness
+- Composable with rate limiting: rate-limited waiters get shared result without waiting for the window
+
+### TaskManager Constraint Integration
+- `manager.addConstraintGroup(group)` / `manager.removeConstraintGroup(name)`
+- `triggerTaskByName()`, `triggerTask()`, `addExecuteRemoveTask()`, cron callbacks all route through `triggerTaskConstrained()`
+- `triggerTaskConstrained(task, input?)` — evaluates constraints, queues if blocked, drains after completion
+- Cooldown-blocked entries auto-drain via timer
+
+### Exported from index.ts
+- `TaskConstraintGroup` class
+- `ITaskConstraintGroupOptions`, `IRateLimitConfig`, `TResultSharingMode` types
+
+## Error Handling (v3.6.0+)
+- `Task` now has `catchErrors` constructor option (default: `false`)
+- Default behavior: `trigger()` rejects when taskFunction throws (breaking change from pre-3.6)
+- Set `catchErrors: true` to swallow errors (old behavior) - returns `undefined` on error
+- Error state tracked via `lastError?: Error`, `errorCount: number`, `clearError()`
+- `getMetadata()` status uses all four values: `'idle'` | `'running'` | `'completed'` | `'failed'`
+- All peripheral classes (Taskchain, Taskparallel, BufferRunner, TaskDebounced, TaskManager) have proper error propagation/handling
+- `console.log` calls replaced with `logger.log()` throughout
+
+## Error Context Improvements
+- **TaskChain**: Errors now wrap the original with context: chain name, failing task name, and task index. Original error preserved via `.cause`
+- **BufferRunner**: When `catchErrors: false`, buffered task errors now reject the trigger promise (via `CycleCounter.informOfCycleError`) instead of silently resolving with `undefined`
+- **TaskChain stubs completed**: `removeTask(task)` returns `boolean`, `shiftTask()` returns `Task | undefined`
+
+## Task Labels (v4.1.0+)
+- `Task` constructor accepts optional `labels?: Record<string, string>`
+- Helper methods: `setLabel(key, value)`, `getLabel(key)`, `removeLabel(key)`, `hasLabel(key, value?)`
+- `getMetadata()` includes `labels` (shallow copy)
+- `TaskManager.getTasksByLabel(key, value)` returns matching `Task[]`
+- `TaskManager.getTasksMetadataByLabel(key, value)` returns matching `ITaskMetadata[]`
+
+## Push-Based Events (v4.1.0+)
+- `Task.eventSubject`: rxjs `Subject<ITaskEvent>` emitting `'started'`, `'step'`, `'completed'`, `'failed'` events
+- `TaskManager.taskSubject`: aggregated `Subject<ITaskEvent>` from all added tasks
+- `TaskManager.removeTask(task)` unsubscribes and removes from map
+- `TaskManager.stop()` cleans up all event subscriptions
+- Exported types: `ITaskEvent`, `TTaskEventType`
+
+## Project Structure
+- Source in `ts/`, web components in `ts_web/`
+- Tests in `test/` - naming: `*.node.ts`, `*.chromium.ts` (preferred), `*.both.ts`
+  - Note: `*.browser.ts` is deprecated, use `*.chromium.ts` for browser tests
+- Logger: `ts/taskbuffer.logging.ts` exports `logger` (ConsoleLog from smartlog)
+- Build: `pnpm build` (tsbuild tsfolders)
+- Test: `pnpm test` or `tstest test/test.XX.name.ts --verbose`
+
+## Web Components (ts_web/)
+- Uses `@design.estate/dees-element` with TC39 decorators
+- Decorators require the `accessor` keyword:
+  ```typescript
+  @property({ type: String })
+  accessor myProp = 'default';
+
+  @state()
+  accessor count = 0;
+  ```
+
+## Service Lifecycle System (v7.0.0+)
+
+### Service<T>
+- `new Service<T>(name)` or `new Service<T>(options: IServiceOptions<T>)`
+- Builder pattern: `.critical()`, `.optional()`, `.dependsOn(...)`, `.withStart(fn)`, `.withStop(fn)`, `.withHealthCheck(fn, config?)`, `.withRetry(config)`, `.withStartupTimeout(ms)`, `.withLabels(labels)`
+- Subclass pattern: override `serviceStart()`, `serviceStop()`, `serviceHealthCheck()`
+- State machine: `stopped` → `starting` → `running` → `degraded` → `failed` → `stopping`
+- `service.instance` — stores the value returned from `start()` (e.g. a database pool)
+- `withStop(fn)` and `withHealthCheck(fn)` receive the instance as argument: `(instance: T) => Promise<void>`
+- `waitForState(target, timeoutMs?)`, `waitForRunning(timeoutMs?)`, `waitForStopped(timeoutMs?)` — programmatic readiness gates
+- Per-service startup timeout via `withStartupTimeout(ms)` or `startupTimeoutMs` in options
+- Labels: `setLabel`, `getLabel`, `removeLabel`, `hasLabel`, `withLabels`
+- Health checks: configurable via `IHealthCheckConfig` with `intervalMs`, `timeoutMs`, `failuresBeforeDegraded`, `failuresBeforeFailed`
+- Auto-restart on health failure: `autoRestart: true` in `IHealthCheckConfig` with `maxAutoRestarts`, `autoRestartDelayMs`, `autoRestartBackoffFactor`
+- Events via `eventSubject`: `'started'`, `'stopped'`, `'failed'`, `'degraded'`, `'recovered'`, `'retrying'`, `'healthCheck'`, `'autoRestarting'`
+
+### ServiceManager
+- `manager.addService(service)` / `manager.addServiceFromOptions(options)` / `manager.removeService(name)`
+- Dependency-ordered startup via topological sort (Kahn's algorithm), level-by-level parallel
+- Critical service failure aborts startup with rollback; optional service failure continues
+- Retry with exponential backoff + jitter
+- Reverse-dependency-ordered shutdown with per-service timeout
+- `restartService(name)` — cascade stops dependents, restarts target, restarts dependents
+- `getHealth()` — aggregated `'healthy' | 'degraded' | 'unhealthy'` status
+- `getServicesByLabel(key, value)` / `getServicesStatusByLabel(key, value)` — label-based queries
+- Circular dependency detection
+- Global startup timeout enforcement via `startupTimeoutMs` in `IServiceManagerOptions`
+
+## Dependencies (as of v7.0.0)
+- `@design.estate/dees-element` ^2.2.3 - TC39 decorators with `accessor` keyword
+- `@push.rocks/lik` ^6.3.1 - Data structures
+- `@push.rocks/smartdelay` ^3.0.5 - Delay utilities
+- `@push.rocks/smartlog` ^3.2.1 - Logging
+- `@push.rocks/smartpromise` ^4.2.3 - Promise utilities
+- `@push.rocks/smartrx` ^3.0.10 - RxJS wrapper
+- `@push.rocks/smarttime` ^4.2.3 - Time/cron utilities
+- `@push.rocks/smartunique` ^3.0.9 - Unique ID generation
+- `@git.zone/tsbuild` ^4.3.0 - Build tool
+- `@git.zone/tsbundle` ^2.9.1 - Bundler (for browser tests)
+- `@git.zone/tsrun` ^2.0.1 - TypeScript runner
+- `@git.zone/tstest` ^3.5.0 - Test runner (supports `.chromium.ts` files)
+- `@types/node` ^25.5.0 - Node.js type definitions

test/test.10.webcomponent.chromium.ts

@@ -0,0 +1,141 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as taskbuffer from '../ts/index.js';
+
+// Note: Web components can't be tested directly in Node.js environment
+// These tests verify the data structures that the web component will consume
+
+// Test that TaskManager can provide data for web component
+tap.test('TaskManager should provide metadata for web visualization', async () => {
+  const taskManager = new taskbuffer.TaskManager();
+  
+  // Add a task with steps
+  const visualTask = new taskbuffer.Task({
+    name: 'VisualizationTest',
+    steps: [
+      { name: 'load', description: 'Loading data', percentage: 30 },
+      { name: 'process', description: 'Processing', percentage: 50 },
+      { name: 'render', description: 'Rendering', percentage: 20 },
+    ] as const,
+    taskFunction: async () => {
+      visualTask.notifyStep('load');
+      await new Promise(resolve => setTimeout(resolve, 50));
+      visualTask.notifyStep('process');
+      await new Promise(resolve => setTimeout(resolve, 50));
+      visualTask.notifyStep('render');
+      return 'Visualization complete';
+    },
+  });
+  
+  taskManager.addTask(visualTask);
+  
+  // Get metadata before execution
+  let metadata = taskManager.getTaskMetadata('VisualizationTest');
+  expect(metadata).toBeDefined();
+  expect(metadata!.name).toEqual('VisualizationTest');
+  expect(metadata!.steps).toHaveLength(3);
+  expect(metadata!.currentProgress).toEqual(0);
+  
+  // Execute task
+  await visualTask.trigger();
+  
+  // Get metadata after execution
+  metadata = taskManager.getTaskMetadata('VisualizationTest');
+  expect(metadata!.currentProgress).toEqual(100);
+  expect(metadata!.steps.every(s => s.status === 'completed')).toBeTrue();
+});
+
+// Test scheduled task metadata for web display
+tap.test('Scheduled tasks should provide next run information', async () => {
+  const taskManager = new taskbuffer.TaskManager();
+  
+  const scheduledTask = new taskbuffer.Task({
+    name: 'WebScheduledTask',
+    steps: [
+      { name: 'run', description: 'Running scheduled task', percentage: 100 },
+    ] as const,
+    taskFunction: async () => {
+      scheduledTask.notifyStep('run');
+    },
+  });
+  
+  // Schedule task for every hour
+  taskManager.addAndScheduleTask(scheduledTask, '0 * * * *');
+  
+  // Get scheduled tasks info
+  const scheduledTasks = taskManager.getScheduledTasks();
+  expect(scheduledTasks).toHaveLength(1);
+  expect(scheduledTasks[0].name).toEqual('WebScheduledTask');
+  expect(scheduledTasks[0].schedule).toEqual('0 * * * *');
+  expect(scheduledTasks[0].nextRun).toBeInstanceOf(Date);
+  expect(scheduledTasks[0].steps).toHaveLength(1);
+  
+  // Clean up
+  taskManager.descheduleTaskByName('WebScheduledTask');
+  taskManager.stop();
+});
+
+// Test data structure compatibility
+tap.test('Task metadata should be suitable for web component display', async () => {
+  const taskManager = new taskbuffer.TaskManager();
+  
+  // Add various types of tasks
+  const simpleTask = new taskbuffer.Task({
+    name: 'SimpleWebTask',
+    taskFunction: async () => 'done',
+  });
+  
+  const bufferedTask = new taskbuffer.Task({
+    name: 'BufferedWebTask',
+    buffered: true,
+    bufferMax: 3,
+    taskFunction: async () => 'buffered',
+  });
+  
+  const steppedTask = new taskbuffer.Task({
+    name: 'SteppedWebTask',
+    steps: [
+      { name: 'step1', description: 'First step', percentage: 50 },
+      { name: 'step2', description: 'Second step', percentage: 50 },
+    ] as const,
+    taskFunction: async () => {
+      steppedTask.notifyStep('step1');
+      steppedTask.notifyStep('step2');
+    },
+  });
+  
+  taskManager.addTask(simpleTask);
+  taskManager.addTask(bufferedTask);
+  taskManager.addTask(steppedTask);
+  
+  // Get all metadata
+  const allMetadata = taskManager.getAllTasksMetadata();
+  expect(allMetadata).toHaveLength(3);
+  
+  // Verify metadata structure
+  allMetadata.forEach(meta => {
+    expect(meta.name).toBeDefined();
+    expect(meta.status).toBeDefined();
+    expect(meta.runCount).toBeDefined();
+    expect(meta.steps).toBeDefined();
+    expect(Array.isArray(meta.steps)).toBeTrue();
+    expect(meta.currentProgress).toBeDefined();
+    expect(typeof meta.currentProgress).toEqual('number');
+  });
+  
+  // Verify buffered task metadata
+  const bufferedMeta = allMetadata.find(m => m.name === 'BufferedWebTask');
+  expect(bufferedMeta!.buffered).toBeTrue();
+  expect(bufferedMeta!.bufferMax).toEqual(3);
+  
+  // Verify stepped task metadata
+  const steppedMeta = allMetadata.find(m => m.name === 'SteppedWebTask');
+  expect(steppedMeta!.steps).toHaveLength(2);
+  steppedMeta!.steps.forEach(step => {
+    expect(step.name).toBeDefined();
+    expect(step.description).toBeDefined();
+    expect(step.percentage).toBeDefined();
+    expect(step.status).toBeDefined();
+  });
+});
+
+export default tap.start();

test/test.11.errorhandling.ts

@@ -0,0 +1,332 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as taskbuffer from '../ts/index.js';
+import * as smartdelay from '@push.rocks/smartdelay';
+
+// Test 1: Default task rejects on error (catchErrors: false)
+tap.test('should reject when taskFunction throws (default catchErrors: false)', async () => {
+  const failingTask = new taskbuffer.Task({
+    name: 'failing-task-default',
+    taskFunction: async () => {
+      throw new Error('intentional failure');
+    },
+  });
+
+  let didReject = false;
+  try {
+    await failingTask.trigger();
+  } catch (err) {
+    didReject = true;
+    expect(err).toBeInstanceOf(Error);
+    expect((err as Error).message).toEqual('intentional failure');
+  }
+  expect(didReject).toBeTrue();
+});
+
+// Test 2: Task with catchErrors: true resolves on error
+tap.test('should resolve with undefined when catchErrors is true', async () => {
+  const failingTask = new taskbuffer.Task({
+    name: 'failing-task-catch',
+    catchErrors: true,
+    taskFunction: async () => {
+      throw new Error('swallowed failure');
+    },
+  });
+
+  const result = await failingTask.trigger();
+  expect(result).toBeUndefined();
+});
+
+// Test 3: lastError and errorCount are set after failure
+tap.test('should set lastError and errorCount after failure', async () => {
+  const failingTask = new taskbuffer.Task({
+    name: 'failing-task-state',
+    catchErrors: true,
+    taskFunction: async () => {
+      throw new Error('tracked failure');
+    },
+  });
+
+  await failingTask.trigger();
+  expect(failingTask.lastError).toBeInstanceOf(Error);
+  expect(failingTask.lastError.message).toEqual('tracked failure');
+  expect(failingTask.errorCount).toEqual(1);
+
+  // Run again to verify errorCount increments
+  await failingTask.trigger();
+  expect(failingTask.errorCount).toEqual(2);
+});
+
+// Test 4: Error state resets on successful re-run
+tap.test('should reset lastError on successful re-run', async () => {
+  let shouldFail = true;
+  const task = new taskbuffer.Task({
+    name: 'intermittent-task',
+    catchErrors: true,
+    taskFunction: async () => {
+      if (shouldFail) {
+        throw new Error('first run fails');
+      }
+      return 'success';
+    },
+  });
+
+  // First run: fail
+  await task.trigger();
+  expect(task.lastError).toBeInstanceOf(Error);
+  expect(task.errorCount).toEqual(1);
+
+  // Second run: succeed
+  shouldFail = false;
+  const result = await task.trigger();
+  expect(result).toEqual('success');
+  expect(task.lastError).toBeUndefined();
+  // errorCount should still be 1 since the second run succeeded
+  expect(task.errorCount).toEqual(1);
+});
+
+// Test 5: Taskchain rejects when a child task throws
+tap.test('should reject Taskchain when a child task throws', async () => {
+  const goodTask = new taskbuffer.Task({
+    name: 'good-chain-task',
+    taskFunction: async () => 'ok',
+  });
+  const badTask = new taskbuffer.Task({
+    name: 'bad-chain-task',
+    taskFunction: async () => {
+      throw new Error('chain failure');
+    },
+  });
+
+  const chain = new taskbuffer.Taskchain({
+    name: 'test-chain',
+    taskArray: [goodTask, badTask],
+  });
+
+  let didReject = false;
+  try {
+    await chain.trigger();
+  } catch (err) {
+    didReject = true;
+  }
+  expect(didReject).toBeTrue();
+});
+
+// Test 6: Taskparallel rejects when a child task throws
+tap.test('should reject Taskparallel when a child task throws', async () => {
+  const goodTask = new taskbuffer.Task({
+    name: 'good-parallel-task',
+    taskFunction: async () => 'ok',
+  });
+  const badTask = new taskbuffer.Task({
+    name: 'bad-parallel-task',
+    taskFunction: async () => {
+      throw new Error('parallel failure');
+    },
+  });
+
+  const parallel = new taskbuffer.Taskparallel({
+    taskArray: [goodTask, badTask],
+  });
+
+  let didReject = false;
+  try {
+    await parallel.trigger();
+  } catch (err) {
+    didReject = true;
+  }
+  expect(didReject).toBeTrue();
+});
+
+// Test 7: BufferRunner handles errors without hanging
+tap.test('should handle BufferRunner errors without hanging', async () => {
+  let callCount = 0;
+  const bufferedTask = new taskbuffer.Task({
+    name: 'buffer-error-task',
+    buffered: true,
+    bufferMax: 3,
+    catchErrors: true,
+    taskFunction: async () => {
+      callCount++;
+      throw new Error('buffer failure');
+    },
+  });
+
+  await bufferedTask.trigger();
+  // The task should have executed and not hung
+  expect(callCount).toBeGreaterThan(0);
+});
+
+// Test 9: clearError() resets error state
+tap.test('should reset error state with clearError()', async () => {
+  const task = new taskbuffer.Task({
+    name: 'clearable-task',
+    catchErrors: true,
+    taskFunction: async () => {
+      throw new Error('to be cleared');
+    },
+  });
+
+  await task.trigger();
+  expect(task.lastError).toBeInstanceOf(Error);
+
+  task.clearError();
+  expect(task.lastError).toBeUndefined();
+  // errorCount should remain unchanged
+  expect(task.errorCount).toEqual(1);
+});
+
+// Test 10: getMetadata() reflects error state
+tap.test('should reflect error state in getMetadata()', async () => {
+  const task = new taskbuffer.Task({
+    name: 'metadata-error-task',
+    catchErrors: true,
+    taskFunction: async () => {
+      throw new Error('metadata failure');
+    },
+  });
+
+  // Before any run
+  let metadata = task.getMetadata();
+  expect(metadata.status).toEqual('idle');
+  expect(metadata.errorCount).toEqual(0);
+
+  // After failing
+  await task.trigger();
+  metadata = task.getMetadata();
+  expect(metadata.status).toEqual('failed');
+  expect(metadata.lastError).toEqual('metadata failure');
+  expect(metadata.errorCount).toEqual(1);
+});
+
+// Test 11: TaskChain error includes task name and index context
+tap.test('should include task name and index in TaskChain error message', async () => {
+  const goodTask = new taskbuffer.Task({
+    name: 'chain-step-ok',
+    taskFunction: async () => 'ok',
+  });
+  const badTask = new taskbuffer.Task({
+    name: 'chain-step-fail',
+    taskFunction: async () => {
+      throw new Error('step exploded');
+    },
+  });
+
+  const chain = new taskbuffer.Taskchain({
+    name: 'context-chain',
+    taskArray: [goodTask, badTask],
+  });
+
+  let caughtError: Error | null = null;
+  try {
+    await chain.trigger();
+  } catch (err) {
+    caughtError = err as Error;
+  }
+  expect(caughtError).toBeInstanceOf(Error);
+  expect(caughtError.message).toInclude('context-chain');
+  expect(caughtError.message).toInclude('chain-step-fail');
+  expect(caughtError.message).toInclude('index 1');
+  expect((caughtError as any).cause).toBeInstanceOf(Error);
+  expect(((caughtError as any).cause as Error).message).toEqual('step exploded');
+});
+
+// Test 12: BufferRunner error propagation with catchErrors: false
+tap.test('should reject buffered task when catchErrors is false', async () => {
+  const bufferedTask = new taskbuffer.Task({
+    name: 'buffer-reject-task',
+    buffered: true,
+    bufferMax: 3,
+    catchErrors: false,
+    taskFunction: async () => {
+      throw new Error('buffer reject failure');
+    },
+  });
+
+  let didReject = false;
+  try {
+    await bufferedTask.trigger();
+  } catch (err) {
+    didReject = true;
+    expect(err).toBeInstanceOf(Error);
+    expect((err as Error).message).toEqual('buffer reject failure');
+  }
+  expect(didReject).toBeTrue();
+});
+
+// Test 13: Taskchain removeTask removes and returns true
+tap.test('should remove a task from Taskchain', async () => {
+  const task1 = new taskbuffer.Task({
+    name: 'removable-1',
+    taskFunction: async () => 'a',
+  });
+  const task2 = new taskbuffer.Task({
+    name: 'removable-2',
+    taskFunction: async () => 'b',
+  });
+
+  const chain = new taskbuffer.Taskchain({
+    name: 'remove-chain',
+    taskArray: [task1, task2],
+  });
+
+  const removed = chain.removeTask(task1);
+  expect(removed).toBeTrue();
+  expect(chain.taskArray.length).toEqual(1);
+  expect(chain.taskArray[0] === task2).toBeTrue();
+});
+
+// Test 14: Taskchain removeTask returns false for unknown task
+tap.test('should return false when removing a task not in Taskchain', async () => {
+  const task1 = new taskbuffer.Task({
+    name: 'existing',
+    taskFunction: async () => 'a',
+  });
+  const unknown = new taskbuffer.Task({
+    name: 'unknown',
+    taskFunction: async () => 'b',
+  });
+
+  const chain = new taskbuffer.Taskchain({
+    name: 'remove-false-chain',
+    taskArray: [task1],
+  });
+
+  const removed = chain.removeTask(unknown);
+  expect(removed).toBeFalse();
+  expect(chain.taskArray.length).toEqual(1);
+});
+
+// Test 15: Taskchain shiftTask returns first task and shortens array
+tap.test('should shift the first task from Taskchain', async () => {
+  const task1 = new taskbuffer.Task({
+    name: 'shift-1',
+    taskFunction: async () => 'a',
+  });
+  const task2 = new taskbuffer.Task({
+    name: 'shift-2',
+    taskFunction: async () => 'b',
+  });
+
+  const chain = new taskbuffer.Taskchain({
+    name: 'shift-chain',
+    taskArray: [task1, task2],
+  });
+
+  const shifted = chain.shiftTask();
+  expect(shifted === task1).toBeTrue();
+  expect(chain.taskArray.length).toEqual(1);
+  expect(chain.taskArray[0] === task2).toBeTrue();
+});
+
+// Test 16: Taskchain shiftTask returns undefined on empty array
+tap.test('should return undefined when shifting from empty Taskchain', async () => {
+  const chain = new taskbuffer.Taskchain({
+    name: 'empty-shift-chain',
+    taskArray: [],
+  });
+
+  const shifted = chain.shiftTask();
+  expect(shifted).toBeUndefined();
+});
+
+export default tap.start();

test/test.12.labels-and-events.ts

@@ -0,0 +1,249 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as taskbuffer from '../ts/index.js';
+import type { ITaskEvent } from '../ts/index.js';
+
+// ─── Labels ───
+
+tap.test('should accept labels in constructor', async () => {
+  const task = new taskbuffer.Task({
+    name: 'labelled-task',
+    taskFunction: async () => 'ok',
+    labels: { userId: 'u1', tenantId: 't1' },
+  });
+  expect(task.labels).toEqual({ userId: 'u1', tenantId: 't1' });
+});
+
+tap.test('should default labels to empty object', async () => {
+  const task = new taskbuffer.Task({
+    name: 'no-labels-task',
+    taskFunction: async () => 'ok',
+  });
+  expect(task.labels).toEqual({});
+});
+
+tap.test('setLabel / getLabel / removeLabel / hasLabel should work', async () => {
+  const task = new taskbuffer.Task({
+    name: 'label-helpers-task',
+    taskFunction: async () => 'ok',
+  });
+
+  task.setLabel('env', 'prod');
+  expect(task.getLabel('env')).toEqual('prod');
+  expect(task.hasLabel('env')).toBeTrue();
+  expect(task.hasLabel('env', 'prod')).toBeTrue();
+  expect(task.hasLabel('env', 'dev')).toBeFalse();
+  expect(task.hasLabel('missing')).toBeFalse();
+
+  const removed = task.removeLabel('env');
+  expect(removed).toBeTrue();
+  expect(task.getLabel('env')).toBeUndefined();
+
+  const removedAgain = task.removeLabel('env');
+  expect(removedAgain).toBeFalse();
+});
+
+tap.test('getMetadata() should include labels', async () => {
+  const task = new taskbuffer.Task({
+    name: 'metadata-labels-task',
+    taskFunction: async () => 'ok',
+    labels: { region: 'eu' },
+  });
+
+  const meta = task.getMetadata();
+  expect(meta.labels).toEqual({ region: 'eu' });
+
+  // Returned labels should be a copy
+  meta.labels!['region'] = 'us';
+  expect(task.labels['region']).toEqual('eu');
+});
+
+tap.test('TaskManager.getTasksByLabel should filter correctly', async () => {
+  const manager = new taskbuffer.TaskManager();
+  const t1 = new taskbuffer.Task({
+    name: 'label-filter-1',
+    taskFunction: async () => 'ok',
+    labels: { userId: 'alice' },
+  });
+  const t2 = new taskbuffer.Task({
+    name: 'label-filter-2',
+    taskFunction: async () => 'ok',
+    labels: { userId: 'bob' },
+  });
+  const t3 = new taskbuffer.Task({
+    name: 'label-filter-3',
+    taskFunction: async () => 'ok',
+    labels: { userId: 'alice' },
+  });
+
+  manager.addTask(t1);
+  manager.addTask(t2);
+  manager.addTask(t3);
+
+  const aliceTasks = manager.getTasksByLabel('userId', 'alice');
+  expect(aliceTasks.length).toEqual(2);
+  expect(aliceTasks.map((t) => t.name).sort()).toEqual(['label-filter-1', 'label-filter-3']);
+
+  const bobMeta = manager.getTasksMetadataByLabel('userId', 'bob');
+  expect(bobMeta.length).toEqual(1);
+  expect(bobMeta[0].name).toEqual('label-filter-2');
+
+  await manager.stop();
+});
+
+// ─── Events ───
+
+tap.test('should emit started + completed on successful trigger', async () => {
+  const events: ITaskEvent[] = [];
+  const task = new taskbuffer.Task({
+    name: 'event-success-task',
+    taskFunction: async () => 'ok',
+  });
+
+  task.eventSubject.subscribe((e) => events.push(e));
+  await task.trigger();
+
+  expect(events.length).toEqual(2);
+  expect(events[0].type).toEqual('started');
+  expect(events[1].type).toEqual('completed');
+  expect(events[0].task.name).toEqual('event-success-task');
+  expect(typeof events[0].timestamp).toEqual('number');
+});
+
+tap.test('should emit step events on notifyStep', async () => {
+  const steps = [
+    { name: 'build', description: 'Build artifacts', percentage: 50 },
+    { name: 'deploy', description: 'Deploy to prod', percentage: 50 },
+  ] as const;
+
+  const events: ITaskEvent[] = [];
+  const task = new taskbuffer.Task({
+    name: 'step-event-task',
+    steps,
+    taskFunction: async () => {
+      task.notifyStep('build');
+      task.notifyStep('deploy');
+      return 'done';
+    },
+  });
+
+  task.eventSubject.subscribe((e) => events.push(e));
+  await task.trigger();
+
+  const stepEvents = events.filter((e) => e.type === 'step');
+  expect(stepEvents.length).toEqual(2);
+  expect(stepEvents[0].stepName).toEqual('build');
+  expect(stepEvents[1].stepName).toEqual('deploy');
+});
+
+tap.test('should emit started + failed on error', async () => {
+  const events: ITaskEvent[] = [];
+  const task = new taskbuffer.Task({
+    name: 'event-fail-task',
+    taskFunction: async () => {
+      throw new Error('boom');
+    },
+  });
+
+  task.eventSubject.subscribe((e) => events.push(e));
+
+  try {
+    await task.trigger();
+  } catch {
+    // expected
+  }
+
+  expect(events.length).toEqual(2);
+  expect(events[0].type).toEqual('started');
+  expect(events[1].type).toEqual('failed');
+  expect(events[1].error).toEqual('boom');
+});
+
+tap.test('should emit failed via done.then path when catchErrors is true', async () => {
+  const events: ITaskEvent[] = [];
+  const task = new taskbuffer.Task({
+    name: 'event-catch-fail-task',
+    catchErrors: true,
+    taskFunction: async () => {
+      throw new Error('swallowed');
+    },
+  });
+
+  task.eventSubject.subscribe((e) => events.push(e));
+  await task.trigger();
+
+  const types = events.map((e) => e.type);
+  expect(types).toContain('started');
+  expect(types).toContain('failed');
+});
+
+tap.test('TaskManager.taskSubject should aggregate events from added tasks', async () => {
+  const manager = new taskbuffer.TaskManager();
+  const events: ITaskEvent[] = [];
+
+  const t1 = new taskbuffer.Task({
+    name: 'agg-task-1',
+    taskFunction: async () => 'a',
+  });
+  const t2 = new taskbuffer.Task({
+    name: 'agg-task-2',
+    taskFunction: async () => 'b',
+  });
+
+  manager.addTask(t1);
+  manager.addTask(t2);
+
+  manager.taskSubject.subscribe((e) => events.push(e));
+
+  await t1.trigger();
+  await t2.trigger();
+
+  const names = [...new Set(events.map((e) => e.task.name))];
+  expect(names.sort()).toEqual(['agg-task-1', 'agg-task-2']);
+  expect(events.filter((e) => e.type === 'started').length).toEqual(2);
+  expect(events.filter((e) => e.type === 'completed').length).toEqual(2);
+
+  await manager.stop();
+});
+
+tap.test('events should stop after removeTask', async () => {
+  const manager = new taskbuffer.TaskManager();
+  const events: ITaskEvent[] = [];
+
+  const task = new taskbuffer.Task({
+    name: 'removable-event-task',
+    taskFunction: async () => 'ok',
+  });
+
+  manager.addTask(task);
+  manager.taskSubject.subscribe((e) => events.push(e));
+
+  await task.trigger();
+  const countBefore = events.length;
+  expect(countBefore).toBeGreaterThan(0);
+
+  manager.removeTask(task);
+
+  // Trigger again — events should NOT appear on manager subject
+  await task.trigger();
+  expect(events.length).toEqual(countBefore);
+
+  await manager.stop();
+});
+
+tap.test('event metadata snapshots should include correct labels', async () => {
+  const events: ITaskEvent[] = [];
+  const task = new taskbuffer.Task({
+    name: 'labelled-event-task',
+    taskFunction: async () => 'ok',
+    labels: { team: 'platform' },
+  });
+
+  task.eventSubject.subscribe((e) => events.push(e));
+  await task.trigger();
+
+  for (const e of events) {
+    expect(e.task.labels).toEqual({ team: 'platform' });
+  }
+});
+
+export default tap.start();

test/test.14.servicemanager.ts

@@ -0,0 +1,894 @@
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as taskbuffer from '../ts/index.js';
+import * as smartdelay from '@push.rocks/smartdelay';
+
+// ── Test 1: Basic service start/stop lifecycle ─────────────
+
+tap.test('should start and stop a simple service', async () => {
+  let started = false;
+  let stopped = false;
+
+  const service = new taskbuffer.Service('TestService')
+    .withStart(async () => { started = true; })
+    .withStop(async () => { stopped = true; });
+
+  expect(service.state).toEqual('stopped');
+  await service.start();
+  expect(service.state).toEqual('running');
+  expect(started).toBeTrue();
+
+  await service.stop();
+  expect(service.state).toEqual('stopped');
+  expect(stopped).toBeTrue();
+});
+
+// ── Test 2: Builder pattern chaining ───────────────────────
+
+tap.test('should support builder pattern chaining', async () => {
+  const service = new taskbuffer.Service('ChainedService')
+    .critical()
+    .dependsOn('Dep1', 'Dep2')
+    .withStart(async () => 'result')
+    .withStop(async () => {})
+    .withRetry({ maxRetries: 5, baseDelayMs: 100 });
+
+  expect(service.criticality).toEqual('critical');
+  expect(service.dependencies).toEqual(['Dep1', 'Dep2']);
+  expect(service.retryConfig).toBeTruthy();
+  expect(service.retryConfig!.maxRetries).toEqual(5);
+});
+
+// ── Test 3: Subclass pattern ───────────────────────────────
+
+tap.test('should support subclass pattern', async () => {
+  class MyService extends taskbuffer.Service<string> {
+    public startCalled = false;
+    public stopCalled = false;
+
+    constructor() {
+      super('MySubclassService');
+      this.optional();
+    }
+
+    protected async serviceStart(): Promise<string> {
+      this.startCalled = true;
+      return 'hello';
+    }
+
+    protected async serviceStop(): Promise<void> {
+      this.stopCalled = true;
+    }
+  }
+
+  const service = new MyService();
+  const result = await service.start();
+  expect(service.startCalled).toBeTrue();
+  expect(service.state).toEqual('running');
+
+  await service.stop();
+  expect(service.stopCalled).toBeTrue();
+  expect(service.state).toEqual('stopped');
+});
+
+// ── Test 4: Constructor with options object ────────────────
+
+tap.test('should accept options object in constructor', async () => {
+  let started = false;
+  const service = new taskbuffer.Service({
+    name: 'OptionsService',
+    criticality: 'critical',
+    dependencies: ['A', 'B'],
+    start: async () => { started = true; },
+    stop: async () => {},
+    retry: { maxRetries: 10 },
+  });
+
+  expect(service.name).toEqual('OptionsService');
+  expect(service.criticality).toEqual('critical');
+  expect(service.dependencies).toEqual(['A', 'B']);
+  await service.start();
+  expect(started).toBeTrue();
+  await service.stop();
+});
+
+// ── Test 5: ServiceManager dependency ordering ─────────────
+
+tap.test('should start services in dependency order', async () => {
+  const order: string[] = [];
+
+  const manager = new taskbuffer.ServiceManager({ name: 'TestManager' });
+
+  manager.addService(
+    new taskbuffer.Service('C')
+      .dependsOn('B')
+      .withStart(async () => { order.push('C'); })
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('A')
+      .withStart(async () => { order.push('A'); })
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('B')
+      .dependsOn('A')
+      .withStart(async () => { order.push('B'); })
+      .withStop(async () => {}),
+  );
+
+  await manager.start();
+
+  // A must come before B, B must come before C
+  expect(order.indexOf('A')).toBeLessThan(order.indexOf('B'));
+  expect(order.indexOf('B')).toBeLessThan(order.indexOf('C'));
+
+  await manager.stop();
+});
+
+// ── Test 6: Critical service failure aborts startup ────────
+
+tap.test('should abort startup when a critical service fails', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'CriticalTest' });
+  let serviceCStopped = false;
+
+  manager.addService(
+    new taskbuffer.Service('Working')
+      .critical()
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Broken')
+      .critical()
+      .withStart(async () => { throw new Error('boom'); })
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('AfterBroken')
+      .dependsOn('Broken')
+      .withStart(async () => { serviceCStopped = true; })
+      .withStop(async () => {}),
+  );
+
+  let caught = false;
+  try {
+    await manager.start();
+  } catch (err) {
+    caught = true;
+    expect((err as Error).message).toInclude('Broken');
+  }
+
+  expect(caught).toBeTrue();
+  // AfterBroken should never have started because Broken (its dep) failed
+  expect(serviceCStopped).toBeFalse();
+});
+
+// ── Test 7: Optional service failure continues startup ─────
+
+tap.test('should continue startup when an optional service fails', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'OptionalTest' });
+  let criticalStarted = false;
+
+  manager.addService(
+    new taskbuffer.Service('Critical')
+      .critical()
+      .withStart(async () => { criticalStarted = true; })
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Optional')
+      .optional()
+      .withStart(async () => { throw new Error('oops'); })
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  // Should NOT throw
+  await manager.start();
+  expect(criticalStarted).toBeTrue();
+
+  const health = manager.getHealth();
+  expect(health.overall).toEqual('degraded');
+
+  const optionalStatus = manager.getServiceStatus('Optional');
+  expect(optionalStatus!.state).toEqual('failed');
+
+  await manager.stop();
+});
+
+// ── Test 8: Retry with backoff for optional services ───────
+
+tap.test('should retry failed optional services', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'RetryTest' });
+  let attempts = 0;
+
+  manager.addService(
+    new taskbuffer.Service('Flaky')
+      .optional()
+      .withStart(async () => {
+        attempts++;
+        if (attempts < 3) {
+          throw new Error(`attempt ${attempts} failed`);
+        }
+      })
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 5, baseDelayMs: 50, maxDelayMs: 100, backoffFactor: 1 }),
+  );
+
+  await manager.start();
+  expect(attempts).toEqual(3);
+
+  const status = manager.getServiceStatus('Flaky');
+  expect(status!.state).toEqual('running');
+
+  await manager.stop();
+});
+
+// ── Test 9: Reverse-order shutdown ─────────────────────────
+
+tap.test('should stop services in reverse dependency order', async () => {
+  const order: string[] = [];
+
+  const manager = new taskbuffer.ServiceManager({ name: 'ShutdownTest' });
+
+  manager.addService(
+    new taskbuffer.Service('Base')
+      .withStart(async () => {})
+      .withStop(async () => { order.push('Base'); }),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Middle')
+      .dependsOn('Base')
+      .withStart(async () => {})
+      .withStop(async () => { order.push('Middle'); }),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Top')
+      .dependsOn('Middle')
+      .withStart(async () => {})
+      .withStop(async () => { order.push('Top'); }),
+  );
+
+  await manager.start();
+  await manager.stop();
+
+  // Top should stop before Middle, Middle before Base
+  expect(order.indexOf('Top')).toBeLessThan(order.indexOf('Middle'));
+  expect(order.indexOf('Middle')).toBeLessThan(order.indexOf('Base'));
+});
+
+// ── Test 10: Circular dependency detection ─────────────────
+
+tap.test('should throw on circular dependency', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'CycleTest' });
+
+  manager.addService(
+    new taskbuffer.Service('A')
+      .dependsOn('B')
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('B')
+      .dependsOn('A')
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  let caught = false;
+  try {
+    await manager.start();
+  } catch (err) {
+    caught = true;
+    expect((err as Error).message).toInclude('Circular dependency');
+  }
+
+  expect(caught).toBeTrue();
+});
+
+// ── Test 11: restartService cascades to dependents ─────────
+
+tap.test('should restart service and its dependents', async () => {
+  const startOrder: string[] = [];
+  const stopOrder: string[] = [];
+
+  const manager = new taskbuffer.ServiceManager({ name: 'RestartTest' });
+
+  manager.addService(
+    new taskbuffer.Service('Base')
+      .withStart(async () => { startOrder.push('Base'); })
+      .withStop(async () => { stopOrder.push('Base'); })
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Dep')
+      .dependsOn('Base')
+      .withStart(async () => { startOrder.push('Dep'); })
+      .withStop(async () => { stopOrder.push('Dep'); })
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  await manager.start();
+  expect(startOrder).toEqual(['Base', 'Dep']);
+
+  // Clear tracking
+  startOrder.length = 0;
+  stopOrder.length = 0;
+
+  await manager.restartService('Base');
+
+  // Dep should be stopped first, then Base, then Base restarted, then Dep
+  expect(stopOrder).toEqual(['Dep', 'Base']);
+  expect(startOrder).toEqual(['Base', 'Dep']);
+
+  await manager.stop();
+});
+
+// ── Test 12: getHealth returns correct aggregated status ───
+
+tap.test('should return correct health aggregation', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'HealthTest' });
+
+  manager.addService(
+    new taskbuffer.Service('OK')
+      .critical()
+      .withStart(async () => {})
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('AlsoOK')
+      .optional()
+      .withStart(async () => {})
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  await manager.start();
+
+  const health = manager.getHealth();
+  expect(health.overall).toEqual('healthy');
+  expect(health.services.length).toEqual(2);
+  expect(health.startedAt).toBeTruthy();
+  expect(health.uptime).toBeGreaterThanOrEqual(0);
+
+  await manager.stop();
+});
+
+// ── Test 13: Events emitted on state transitions ───────────
+
+tap.test('should emit events on state transitions', async () => {
+  const events: taskbuffer.IServiceEvent[] = [];
+
+  const manager = new taskbuffer.ServiceManager({ name: 'EventTest' });
+
+  manager.addService(
+    new taskbuffer.Service('Svc')
+      .withStart(async () => {})
+      .withStop(async () => {})
+      .withRetry({ maxRetries: 0 }),
+  );
+
+  manager.serviceSubject.subscribe((event) => {
+    events.push(event);
+  });
+
+  await manager.start();
+  await manager.stop();
+
+  const types = events.map((e) => e.type);
+  expect(types).toContain('started');
+  expect(types).toContain('stopped');
+});
+
+// ── Test 14: Parallel startup of independent services ──────
+
+tap.test('should start independent services in parallel', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'ParallelTest' });
+  const startTimes: Record<string, number> = {};
+
+  manager.addService(
+    new taskbuffer.Service('A')
+      .withStart(async () => {
+        startTimes['A'] = Date.now();
+        await smartdelay.delayFor(100);
+      })
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('B')
+      .withStart(async () => {
+        startTimes['B'] = Date.now();
+        await smartdelay.delayFor(100);
+      })
+      .withStop(async () => {}),
+  );
+
+  await manager.start();
+
+  // Both should start at roughly the same time (within 50ms)
+  const diff = Math.abs(startTimes['A'] - startTimes['B']);
+  expect(diff).toBeLessThan(50);
+
+  await manager.stop();
+});
+
+// ── Test 15: getStatus snapshot ────────────────────────────
+
+tap.test('should return accurate status snapshot', async () => {
+  const service = new taskbuffer.Service('StatusTest')
+    .critical()
+    .dependsOn('X')
+    .withStart(async () => {})
+    .withStop(async () => {});
+
+  const statusBefore = service.getStatus();
+  expect(statusBefore.state).toEqual('stopped');
+  expect(statusBefore.name).toEqual('StatusTest');
+  expect(statusBefore.criticality).toEqual('critical');
+  expect(statusBefore.dependencies).toEqual(['X']);
+  expect(statusBefore.errorCount).toEqual(0);
+
+  await service.start();
+
+  const statusAfter = service.getStatus();
+  expect(statusAfter.state).toEqual('running');
+  expect(statusAfter.startedAt).toBeTruthy();
+  expect(statusAfter.uptime).toBeGreaterThanOrEqual(0);
+
+  await service.stop();
+});
+
+// ── Test 16: Missing dependency detection ──────────────────
+
+tap.test('should throw when a dependency is not registered', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'MissingDepTest' });
+
+  manager.addService(
+    new taskbuffer.Service('Lonely')
+      .dependsOn('Ghost')
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  let caught = false;
+  try {
+    await manager.start();
+  } catch (err) {
+    caught = true;
+    expect((err as Error).message).toInclude('Ghost');
+    expect((err as Error).message).toInclude('not registered');
+  }
+
+  expect(caught).toBeTrue();
+});
+
+// ── Test 17: No-op on double start/stop ────────────────────
+
+tap.test('should be a no-op when starting an already-running service', async () => {
+  let startCount = 0;
+
+  const service = new taskbuffer.Service('DoubleStart')
+    .withStart(async () => { startCount++; })
+    .withStop(async () => {});
+
+  await service.start();
+  await service.start(); // should be no-op
+
+  expect(startCount).toEqual(1);
+
+  await service.stop();
+  await service.stop(); // should be no-op
+});
+
+// ── Test 18: addServiceFromOptions convenience ─────────────
+
+tap.test('should support addServiceFromOptions', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'ConvenienceTest' });
+  let started = false;
+
+  const service = manager.addServiceFromOptions({
+    name: 'Easy',
+    start: async () => { started = true; },
+    stop: async () => {},
+  });
+
+  expect(service).toBeInstanceOf(taskbuffer.Service);
+  expect(service.name).toEqual('Easy');
+
+  await manager.start();
+  expect(started).toBeTrue();
+  await manager.stop();
+});
+
+// ═══════════════════════════════════════════════════════════
+// NEW TESTS: Improvements 1-5
+// ═══════════════════════════════════════════════════════════
+
+// ── Test 19: service.instance stores start result ──────────
+
+tap.test('should store start result as service.instance', async () => {
+  const pool = { query: (sql: string) => `result: ${sql}` };
+
+  const service = new taskbuffer.Service<typeof pool>('DB')
+    .withStart(async () => pool)
+    .withStop(async (inst) => {});
+
+  expect(service.instance).toBeUndefined();
+
+  const result = await service.start();
+  expect(result).toEqual(pool);
+  expect(service.instance).toEqual(pool);
+  expect(service.instance!.query('SELECT 1')).toEqual('result: SELECT 1');
+
+  // Status should report hasInstance
+  expect(service.getStatus().hasInstance).toBeTrue();
+
+  await service.stop();
+  expect(service.instance).toBeUndefined();
+  expect(service.getStatus().hasInstance).toBeFalse();
+});
+
+// ── Test 20: stop receives the instance ────────────────────
+
+tap.test('should pass instance to stop function', async () => {
+  let receivedInstance: any = null;
+
+  const service = new taskbuffer.Service<{ id: number }>('InstanceStop')
+    .withStart(async () => ({ id: 42 }))
+    .withStop(async (inst) => { receivedInstance = inst; });
+
+  await service.start();
+  await service.stop();
+
+  expect(receivedInstance).toBeTruthy();
+  expect(receivedInstance.id).toEqual(42);
+});
+
+// ── Test 21: healthCheck receives the instance ─────────────
+
+tap.test('should pass instance to health check function', async () => {
+  let checkedInstance: any = null;
+
+  const service = new taskbuffer.Service<{ healthy: boolean }>('InstanceHealth')
+    .withStart(async () => ({ healthy: true }))
+    .withStop(async () => {})
+    .withHealthCheck(async (inst) => {
+      checkedInstance = inst;
+      return inst.healthy;
+    }, { intervalMs: 60000 }); // long interval so it doesn't auto-run
+
+  await service.start();
+
+  // Manually trigger health check
+  const ok = await service.checkHealth();
+  expect(ok).toBeTrue();
+  expect(checkedInstance).toBeTruthy();
+  expect(checkedInstance.healthy).toBeTrue();
+
+  await service.stop();
+});
+
+// ── Test 22: double start returns existing instance ────────
+
+tap.test('should return existing instance on double start', async () => {
+  let callCount = 0;
+  const service = new taskbuffer.Service<number>('DoubleInstance')
+    .withStart(async () => { callCount++; return callCount; })
+    .withStop(async () => {});
+
+  const first = await service.start();
+  const second = await service.start();
+
+  expect(first).toEqual(1);
+  expect(second).toEqual(1); // should return same instance, not call start again
+  expect(callCount).toEqual(1);
+
+  await service.stop();
+});
+
+// ── Test 23: Labels on Service ─────────────────────────────
+
+tap.test('should support labels on services', async () => {
+  const service = new taskbuffer.Service('LabeledService')
+    .withLabels({ type: 'database', env: 'production' })
+    .withStart(async () => {})
+    .withStop(async () => {});
+
+  expect(service.hasLabel('type')).toBeTrue();
+  expect(service.hasLabel('type', 'database')).toBeTrue();
+  expect(service.hasLabel('type', 'cache')).toBeFalse();
+  expect(service.getLabel('env')).toEqual('production');
+
+  service.setLabel('region', 'eu-west');
+  expect(service.hasLabel('region')).toBeTrue();
+
+  service.removeLabel('env');
+  expect(service.hasLabel('env')).toBeFalse();
+
+  // Labels in status
+  const status = service.getStatus();
+  expect(status.labels).toBeTruthy();
+  expect(status.labels!.type).toEqual('database');
+  expect(status.labels!.region).toEqual('eu-west');
+});
+
+// ── Test 24: Labels via IServiceOptions ────────────────────
+
+tap.test('should accept labels in options constructor', async () => {
+  const service = new taskbuffer.Service({
+    name: 'OptionsLabeled',
+    start: async () => {},
+    stop: async () => {},
+    labels: { kind: 'cache' },
+  });
+
+  expect(service.hasLabel('kind', 'cache')).toBeTrue();
+});
+
+// ── Test 25: ServiceManager.getServicesByLabel ─────────────
+
+tap.test('should query services by label in ServiceManager', async () => {
+  const manager = new taskbuffer.ServiceManager({ name: 'LabelQueryTest' });
+
+  manager.addService(
+    new taskbuffer.Service('Redis')
+      .withLabels({ type: 'cache', tier: 'fast' })
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Memcached')
+      .withLabels({ type: 'cache', tier: 'fast' })
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  manager.addService(
+    new taskbuffer.Service('Postgres')
+      .withLabels({ type: 'database', tier: 'slow' })
+      .withStart(async () => {})
+      .withStop(async () => {}),
+  );
+
+  const caches = manager.getServicesByLabel('type', 'cache');
+  expect(caches.length).toEqual(2);
+
+  const databases = manager.getServicesByLabel('type', 'database');
+  expect(databases.length).toEqual(1);
+  expect(databases[0].name).toEqual('Postgres');
+
+  const statuses = manager.getServicesStatusByLabel('tier', 'fast');
+  expect(statuses.length).toEqual(2);
+
+  await manager.stop();
+});
+
+// ── Test 26: waitForState / waitForRunning ──────────────────
+
+tap.test('should support waitForState and waitForRunning', async () => {
+  const service = new taskbuffer.Service('WaitService')
+    .withStart(async () => {
+      await smartdelay.delayFor(50);
+    })
+    .withStop(async () => {});
+
+  // Start in background
+  const startPromise = service.start();
+
+  // Wait for running state
+  await service.waitForRunning(2000);
+  expect(service.state).toEqual('running');
+
+  await startPromise;
+
+  // Now wait for stopped
+  const stopPromise = service.stop();
+  await service.waitForStopped(2000);
+  expect(service.state).toEqual('stopped');
+
+  await stopPromise;
+});
+
+// ── Test 27: waitForState timeout ──────────────────────────
+
+tap.test('should timeout when waiting for a state that never comes', async () => {
+  const service = new taskbuffer.Service('TimeoutWait')
+    .withStart(async () => {})
+    .withStop(async () => {});
+
+  // Service is stopped, wait for 'running' with a short timeout
+  let caught = false;
+  try {
+    await service.waitForState('running', 100);
+  } catch (err) {
+    caught = true;
+    expect((err as Error).message).toInclude('timed out');
+    expect((err as Error).message).toInclude('running');
+  }
+
+  expect(caught).toBeTrue();
+});
+
+// ── Test 28: waitForState already in target state ──────────
+
+tap.test('should resolve immediately if already in target state', async () => {
+  const service = new taskbuffer.Service('AlreadyThere')
+    .withStart(async () => {})
+    .withStop(async () => {});
+
+  // Already stopped
+  await service.waitForState('stopped', 100); // should not throw
+
+  await service.start();
+  await service.waitForState('running', 100); // should not throw
+
+  await service.stop();
+});
+
+// ── Test 29: Per-service startup timeout ───────────────────
+
+tap.test('should timeout when serviceStart hangs', async () => {
+  const service = new taskbuffer.Service('SlowStart')
+    .withStart(async () => {
+      await smartdelay.delayFor(5000); // very slow
+    })
+    .withStop(async () => {})
+    .withStartupTimeout(100); // 100ms timeout
+
+  let caught = false;
+  try {
+    await service.start();
+  } catch (err) {
+    caught = true;
+    expect((err as Error).message).toInclude('startup timed out');
+    expect((err as Error).message).toInclude('100ms');
+  }
+
+  expect(caught).toBeTrue();
+  expect(service.state).toEqual('failed');
+});
+
+// ── Test 30: Startup timeout via options ────────────────────
+
+tap.test('should accept startupTimeoutMs in options constructor', async () => {
+  const service = new taskbuffer.Service({
+    name: 'TimeoutOptions',
+    start: async () => { await smartdelay.delayFor(5000); },
+    stop: async () => {},
+    startupTimeoutMs: 100,
+  });
+
+  let caught = false;
+  try {
+    await service.start();
+  } catch (err) {
+    caught = true;
+    expect((err as Error).message).toInclude('startup timed out');
+  }
+
+  expect(caught).toBeTrue();
+});
+
+// ── Test 31: Auto-restart on health check failure ──────────
+
+tap.test('should auto-restart when health checks fail', async () => {
+  let startCount = 0;
+  let healthy = false;
+
+  const service = new taskbuffer.Service('AutoRestart')
+    .withStart(async () => {
+      startCount++;
+      // After first restart, become healthy
+      if (startCount >= 2) {
+        healthy = true;
+      }
+    })
+    .withStop(async () => {})
+    .withHealthCheck(async () => healthy, {
+      intervalMs: 30000, // we'll call checkHealth manually
+      failuresBeforeDegraded: 1,
+      failuresBeforeFailed: 2,
+      autoRestart: true,
+      maxAutoRestarts: 3,
+      autoRestartDelayMs: 50,
+      autoRestartBackoffFactor: 1,
+    });
+
+  await service.start();
+  expect(startCount).toEqual(1);
+
+  // Fail health checks manually to push to failed
+  await service.checkHealth(); // 1 failure -> degraded
+  expect(service.state).toEqual('degraded');
+
+  await service.checkHealth(); // 2 failures -> failed + auto-restart scheduled
+  expect(service.state).toEqual('failed');
+
+  // Wait for auto-restart to complete
+  await service.waitForRunning(2000);
+  expect(service.state).toEqual('running');
+  expect(startCount).toEqual(2);
+
+  await service.stop();
+});
+
+// ── Test 32: Auto-restart max attempts ─────────────────────
+
+tap.test('should stop auto-restarting after max attempts', async () => {
+  let startCount = 0;
+  const events: string[] = [];
+
+  const service = new taskbuffer.Service('MaxRestart')
+    .withStart(async () => {
+      startCount++;
+      if (startCount > 1) {
+        throw new Error('always fails');
+      }
+    })
+    .withStop(async () => {})
+    .withHealthCheck(async () => false, {
+      intervalMs: 60000,
+      failuresBeforeDegraded: 1,
+      failuresBeforeFailed: 2,
+      autoRestart: true,
+      maxAutoRestarts: 2,
+      autoRestartDelayMs: 50,
+      autoRestartBackoffFactor: 1,
+    });
+
+  service.eventSubject.subscribe((e) => events.push(e.type));
+
+  await service.start();
+  expect(startCount).toEqual(1);
+
+  // Push to failed
+  await service.checkHealth();
+  await service.checkHealth();
+
+  // Wait for auto-restart attempts to exhaust
+  await smartdelay.delayFor(500);
+
+  // Should have emitted autoRestarting events
+  expect(events).toContain('autoRestarting');
+
+  // Service should be in failed state (restarts exhausted)
+  expect(service.state).toEqual('failed');
+
+  // Clean up
+  await service.stop();
+});
+
+// ── Test 33: Builder chaining with new methods ─────────────
+
+tap.test('should chain all new builder methods', async () => {
+  const service = new taskbuffer.Service('FullBuilder')
+    .critical()
+    .dependsOn('A')
+    .withStart(async () => ({ conn: true }))
+    .withStop(async (inst) => {})
+    .withHealthCheck(async (inst) => inst.conn)
+    .withRetry({ maxRetries: 3 })
+    .withStartupTimeout(5000)
+    .withLabels({ env: 'test' });
+
+  expect(service.criticality).toEqual('critical');
+  expect(service.startupTimeoutMs).toEqual(5000);
+  expect(service.hasLabel('env', 'test')).toBeTrue();
+});
+
+export default tap.start();

test/test.2.taskchain.ts

@@ -36,12 +36,9 @@ tap.test('expect run tasks in sequence', async () => {
   });
   const testPromise = testTaskchain.trigger();
   await smartdelay.delayFor(2100);
-  // tslint:disable-next-line:no-unused-expression
   expect(task1Executed).toBeTrue();
-  // tslint:disable-next-line:no-unused-expression
   expect(task2Executed).toBeFalse();
   await smartdelay.delayFor(2100);
-  // tslint:disable-next-line:no-unused-expression
   expect(task2Executed).toBeTrue();
   await testPromise;
 });

test/test.4.taskmanager.ts

@@ -25,7 +25,7 @@ tap.test('should run the task as expected', async () => {
         console.log('Task "myTask" executed!');
         referenceBoolean = true;
         taskRunCounter++;
-        if (taskRunCounter === 10) {
+        if (taskRunCounter === 3) {
           taskDone.resolve();
         }
       },
@@ -33,12 +33,11 @@ tap.test('should run the task as expected', async () => {
   );
   myTaskManager.start();
   await myTaskManager.triggerTaskByName('myTask');
-  // tslint:disable-next-line:no-unused-expression
   expect(referenceBoolean).toBeTrue();
 });
 
 tap.test('should schedule task', async () => {
-  myTaskManager.scheduleTaskByName('myTask', '*/10 * * * * *');
+  myTaskManager.scheduleTaskByName('myTask', '*/5 * * * * *');
   await taskDone.promise;
   myTaskManager.descheduleTaskByName('myTask');
 });

test/test.8.bufferedrun.ts

@@ -1,52 +1,151 @@
 import { tap, expect } from '@git.zone/tstest/tapbundle';
 
 import * as taskbuffer from '../ts/index.js';
+import * as smartdelay from '@push.rocks/smartdelay';
 
-let counter1 = 0;
-let counter2 = 0;
-let counter3 = 0;
+// Test 1: Basic buffered execution with afterTask chain
+tap.test('should run buffered tasks with afterTask chain', async () => {
+  let counter1 = 0;
+  let counter2 = 0;
+  let counter3 = 0;
 
-tap.test('should run buffered', async (tools) => {
-  const task = new taskbuffer.Task({
-    name: 'a buffered task',
-    taskFunction: async () => {
-      counter1++;
-      await tools.delayFor(2000);
-      console.log(`task 1 ran ${counter1} times`);
-    },
-    buffered: true,
-    bufferMax: 1,
-    afterTask: () => {
-      return task2;
-    },
-  });
-  const task2 = new taskbuffer.Task({
-    name: 'a buffered task',
-    taskFunction: async () => {
-      counter2++;
-      await tools.delayFor(2000);
-      console.log(`task2 ran ${counter2} times`);
-    },
-    buffered: true,
-    bufferMax: 1,
-    afterTask: () => {
-      return task3;
-    },
-  });
   const task3 = new taskbuffer.Task({
-    name: 'a buffered task',
+    name: 'buffered-chain-3',
     taskFunction: async () => {
       counter3++;
-      await tools.delayFor(2000);
-      console.log(`task3 ran ${counter3} times`);
+      await smartdelay.delayFor(50);
     },
     buffered: true,
     bufferMax: 1,
   });
-  while (counter1 < 10) {
-    await tools.delayFor(5000);
-    task.trigger();
+
+  const task2 = new taskbuffer.Task({
+    name: 'buffered-chain-2',
+    taskFunction: async () => {
+      counter2++;
+      await smartdelay.delayFor(50);
+    },
+    buffered: true,
+    bufferMax: 1,
+    afterTask: () => task3,
+  });
+
+  const task1 = new taskbuffer.Task({
+    name: 'buffered-chain-1',
+    taskFunction: async () => {
+      counter1++;
+      await smartdelay.delayFor(50);
+    },
+    buffered: true,
+    bufferMax: 1,
+    afterTask: () => task2,
+  });
+
+  // Trigger 3 times with enough spacing for the chain to complete
+  for (let i = 0; i < 3; i++) {
+    task1.trigger();
+    await smartdelay.delayFor(250); // enough for chain of 3 x 50ms tasks
   }
+
+  // Wait for final chain to finish
+  await smartdelay.delayFor(500);
+
+  // Each task in the chain should have run at least once
+  expect(counter1).toBeGreaterThanOrEqual(1);
+  expect(counter2).toBeGreaterThanOrEqual(1);
+  expect(counter3).toBeGreaterThanOrEqual(1);
+
+  // afterTask chain means task2 count should match task1 (each trigger chains)
+  expect(counter2).toEqual(counter1);
+  expect(counter3).toEqual(counter1);
 });
 
-tap.start();
+// Test 2: bufferMax limits concurrent buffered executions
+tap.test('should respect bufferMax for concurrent buffered calls', async () => {
+  let running = 0;
+  let maxRunning = 0;
+  let totalRuns = 0;
+
+  const task = new taskbuffer.Task({
+    name: 'buffer-max-test',
+    taskFunction: async () => {
+      running++;
+      maxRunning = Math.max(maxRunning, running);
+      totalRuns++;
+      await smartdelay.delayFor(100);
+      running--;
+    },
+    buffered: true,
+    bufferMax: 2,
+  });
+
+  // Fire many triggers rapidly — only bufferMax should run concurrently
+  for (let i = 0; i < 10; i++) {
+    task.trigger();
+  }
+
+  // Wait for all buffered executions to complete
+  await smartdelay.delayFor(1000);
+
+  expect(maxRunning).toBeLessThanOrEqual(2);
+  expect(totalRuns).toBeGreaterThanOrEqual(1);
+});
+
+// Test 3: bufferMax limits how many runs are queued during execution
+tap.test('should limit queued runs to bufferMax during execution', async () => {
+  let runCount = 0;
+
+  const task = new taskbuffer.Task({
+    name: 'buffer-queue-test',
+    taskFunction: async () => {
+      runCount++;
+      await smartdelay.delayFor(100);
+    },
+    buffered: true,
+    bufferMax: 2,
+  });
+
+  // Rapid-fire 5 triggers — bufferMax:2 means counter caps at 2
+  // so only 2 runs will happen (the initial run + 1 buffered rerun)
+  task.trigger();
+  task.trigger();
+  task.trigger();
+  task.trigger();
+  task.trigger();
+
+  await smartdelay.delayFor(500);
+
+  expect(runCount).toEqual(2);
+});
+
+// Test 4: Triggers spaced after completion queue new runs
+tap.test('should re-trigger after previous buffered run completes', async () => {
+  let runCount = 0;
+
+  const task = new taskbuffer.Task({
+    name: 'retrigger-test',
+    taskFunction: async () => {
+      runCount++;
+      await smartdelay.delayFor(50);
+    },
+    buffered: true,
+    bufferMax: 1,
+  });
+
+  // First trigger starts execution
+  task.trigger();
+  // Wait for it to complete
+  await smartdelay.delayFor(100);
+
+  // Second trigger starts a new execution (task is now idle)
+  task.trigger();
+  await smartdelay.delayFor(100);
+
+  // Third trigger
+  task.trigger();
+  await smartdelay.delayFor(100);
+
+  expect(runCount).toEqual(3);
+});
+
+export default tap.start();

test/test.9.steps.ts

@@ -147,7 +147,7 @@ tap.test('Task should provide complete metadata', async () => {
   
   // Get metadata after execution
   metadata = task.getMetadata();
-  expect(metadata.status).toEqual('idle');
+  expect(metadata.status).toEqual('completed');
   expect(metadata.runCount).toEqual(1);
   expect(metadata.currentProgress).toEqual(100);
 });

test/test.taskrunner.ts

@@ -1,34 +0,0 @@
-import { tap, expect } from '@git.zone/tstest/tapbundle';
-
-import * as taskbuffer from '../ts/index.js';
-
-let testTaskRunner: taskbuffer.TaskRunner;
-
-tap.test('should create a valid taskrunner', async () => {
-  testTaskRunner = new taskbuffer.TaskRunner();
-  await testTaskRunner.start();
-});
-
-tap.test('should execute task when its scheduled', async (tools) => {
-  const done = tools.defer();
-  testTaskRunner.addTask(
-    new taskbuffer.Task({
-      taskFunction: async () => {
-        console.log('hi');
-      },
-    }),
-  );
-
-  testTaskRunner.addTask(
-    new taskbuffer.Task({
-      taskFunction: async () => {
-        console.log('there');
-        done.resolve();
-      },
-    }),
-  );
-
-  await done.promise;
-});
-
-tap.start();

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/taskbuffer',
-  version: '3.2.0',
+  version: '8.0.0',
   description: 'A flexible task management library supporting TypeScript, allowing for task buffering, scheduling, and execution with dependency management.'
 }

ts/index.ts

@@ -4,15 +4,32 @@ export { Taskchain } from './taskbuffer.classes.taskchain.js';
 export { Taskparallel } from './taskbuffer.classes.taskparallel.js';
 export { TaskManager } from './taskbuffer.classes.taskmanager.js';
 export { TaskOnce } from './taskbuffer.classes.taskonce.js';
-export { TaskRunner } from './taskbuffer.classes.taskrunner.js';
 export { TaskDebounced } from './taskbuffer.classes.taskdebounced.js';
+export { TaskConstraintGroup } from './taskbuffer.classes.taskconstraintgroup.js';
 
 // Task step system
 export { TaskStep } from './taskbuffer.classes.taskstep.js';
 export type { ITaskStep } from './taskbuffer.classes.taskstep.js';
 
 // Metadata interfaces
-export type { ITaskMetadata, ITaskExecutionReport, IScheduledTaskInfo } from './taskbuffer.interfaces.js';
+export type { ITaskMetadata, ITaskExecutionReport, IScheduledTaskInfo, ITaskEvent, TTaskEventType, ITaskConstraintGroupOptions, ITaskExecution, IRateLimitConfig, TResultSharingMode } from './taskbuffer.interfaces.js';
+
+// Service lifecycle system
+export { Service } from './taskbuffer.classes.service.js';
+export { ServiceManager } from './taskbuffer.classes.servicemanager.js';
+export type {
+  IServiceOptions,
+  IServiceStatus,
+  IServiceEvent,
+  IServiceManagerOptions,
+  IServiceManagerHealth,
+  IRetryConfig,
+  IHealthCheckConfig,
+  TServiceState,
+  TServiceCriticality,
+  TServiceEventType,
+  TOverallHealth,
+} from './taskbuffer.interfaces.js';
 
 import * as distributedCoordination from './taskbuffer.classes.distributedcoordinator.js';
 export { distributedCoordination };

ts/taskbuffer.classes.bufferrunner.ts

@@ -1,11 +1,12 @@
 import { Task } from './taskbuffer.classes.task.js';
+import { logger } from './taskbuffer.logging.js';
 
 export class BufferRunner {
   public task: Task;
   // initialize by default
   public bufferCounter: number = 0;
 
-  constructor(taskArg: Task<any>) {
+  constructor(taskArg: Task<any, any, any>) {
     this.task = taskArg;
   }
 
@@ -24,9 +25,19 @@ export class BufferRunner {
   private async _run(x: any) {
     this.task.running = true;
     while (this.bufferCounter > 0) {
-      const result = await Task.runTask(this.task, { x: x });
-      this.bufferCounter--;
-      this.task.cycleCounter.informOfCycle(result);
+      try {
+        const result = await Task.runTask(this.task, { x: x });
+        this.bufferCounter--;
+        this.task.cycleCounter.informOfCycle(result);
+      } catch (err) {
+        logger.log('error', `BufferRunner: task "${this.task.name || 'unnamed'}" failed: ${err instanceof Error ? err.message : String(err)}`);
+        this.bufferCounter--;
+        if (this.task.catchErrors) {
+          this.task.cycleCounter.informOfCycle(undefined);
+        } else {
+          this.task.cycleCounter.informOfCycleError(err instanceof Error ? err : new Error(String(err)));
+        }
+      }
     }
     this.task.running = false;
   }

ts/taskbuffer.classes.cyclecounter.ts

@@ -9,7 +9,7 @@ export interface ICycleObject {
 export class CycleCounter {
   public task: Task;
   public cycleObjectArray: ICycleObject[] = [];
-  constructor(taskArg: Task<any>) {
+  constructor(taskArg: Task<any, any, any>) {
     this.task = taskArg;
   }
   public getPromiseForCycle(cycleCountArg: number) {
@@ -33,4 +33,16 @@ export class CycleCounter {
     });
     this.cycleObjectArray = newCycleObjectArray;
   }
+  public informOfCycleError(err: Error) {
+    const newCycleObjectArray: ICycleObject[] = [];
+    this.cycleObjectArray.forEach((cycleObjectArg) => {
+      cycleObjectArg.cycleCounter--;
+      if (cycleObjectArg.cycleCounter <= 0) {
+        cycleObjectArg.deferred.reject(err);
+      } else {
+        newCycleObjectArray.push(cycleObjectArg);
+      }
+    });
+    this.cycleObjectArray = newCycleObjectArray;
+  }
 }

ts/taskbuffer.classes.service.ts

@@ -0,0 +1,528 @@
+import * as plugins from './taskbuffer.plugins.js';
+import { logger } from './taskbuffer.logging.js';
+import type {
+  TServiceState,
+  TServiceCriticality,
+  IServiceEvent,
+  IServiceStatus,
+  IRetryConfig,
+  IHealthCheckConfig,
+  IServiceOptions,
+} from './taskbuffer.interfaces.js';
+
+/**
+ * Service represents a long-running component with start/stop lifecycle,
+ * health checking, and retry capabilities.
+ *
+ * Use via builder pattern:
+ *   new Service('MyService')
+ *     .critical()
+ *     .dependsOn('Database')
+ *     .withStart(async () => { ... })
+ *     .withStop(async (instance) => { ... })
+ *     .withHealthCheck(async (instance) => { ... })
+ *
+ * Or extend for complex services:
+ *   class MyService extends Service {
+ *     protected async serviceStart() { ... }
+ *     protected async serviceStop() { ... }
+ *   }
+ */
+export class Service<T = any> {
+  public readonly name: string;
+  public readonly eventSubject = new plugins.smartrx.rxjs.Subject<IServiceEvent>();
+
+  // ── Internal state ─────────────────────────────────
+  private _state: TServiceState = 'stopped';
+  private _criticality: TServiceCriticality = 'optional';
+  private _dependencies: string[] = [];
+  private _retryConfig: IRetryConfig | undefined;
+  private _healthCheckConfig: IHealthCheckConfig | undefined;
+  private _startupTimeoutMs: number | undefined;
+
+  // Builder-provided functions
+  private _startFn: (() => Promise<T>) | undefined;
+  private _stopFn: ((instance: T) => Promise<void>) | undefined;
+  private _healthCheckFn: ((instance: T) => Promise<boolean>) | undefined;
+
+  // Instance: the resolved start result
+  private _instance: T | undefined;
+
+  // Labels
+  public labels: Record<string, string> = {};
+
+  // Runtime tracking
+  private _startedAt: number | undefined;
+  private _stoppedAt: number | undefined;
+  private _errorCount = 0;
+  private _lastError: string | undefined;
+  private _retryCount = 0;
+
+  // Health check tracking
+  private _healthCheckTimer: ReturnType<typeof setTimeout> | undefined;
+  private _lastHealthCheck: number | undefined;
+  private _healthCheckOk: boolean | undefined;
+  private _consecutiveHealthFailures = 0;
+
+  // Auto-restart tracking
+  private _autoRestartCount = 0;
+  private _autoRestartTimer: ReturnType<typeof setTimeout> | undefined;
+
+  constructor(nameOrOptions: string | IServiceOptions<T>) {
+    if (typeof nameOrOptions === 'string') {
+      this.name = nameOrOptions;
+    } else {
+      this.name = nameOrOptions.name;
+      this._startFn = nameOrOptions.start;
+      this._stopFn = nameOrOptions.stop;
+      this._healthCheckFn = nameOrOptions.healthCheck;
+      this._criticality = nameOrOptions.criticality || 'optional';
+      this._dependencies = nameOrOptions.dependencies || [];
+      this._retryConfig = nameOrOptions.retry;
+      this._healthCheckConfig = nameOrOptions.healthCheckConfig;
+      this._startupTimeoutMs = nameOrOptions.startupTimeoutMs;
+      if (nameOrOptions.labels) {
+        this.labels = { ...nameOrOptions.labels };
+      }
+    }
+  }
+
+  // ── Builder methods ──────────────────────────────────
+
+  public critical(): this {
+    this._criticality = 'critical';
+    return this;
+  }
+
+  public optional(): this {
+    this._criticality = 'optional';
+    return this;
+  }
+
+  public dependsOn(...serviceNames: string[]): this {
+    this._dependencies.push(...serviceNames);
+    return this;
+  }
+
+  public withStart(fn: () => Promise<T>): this {
+    this._startFn = fn;
+    return this;
+  }
+
+  public withStop(fn: (instance: T) => Promise<void>): this {
+    this._stopFn = fn;
+    return this;
+  }
+
+  public withHealthCheck(fn: (instance: T) => Promise<boolean>, config?: IHealthCheckConfig): this {
+    this._healthCheckFn = fn;
+    if (config) {
+      this._healthCheckConfig = config;
+    }
+    return this;
+  }
+
+  public withRetry(config: IRetryConfig): this {
+    this._retryConfig = config;
+    return this;
+  }
+
+  public withStartupTimeout(ms: number): this {
+    this._startupTimeoutMs = ms;
+    return this;
+  }
+
+  public withLabels(labelsArg: Record<string, string>): this {
+    Object.assign(this.labels, labelsArg);
+    return this;
+  }
+
+  // ── Label helpers ──────────────────────────────────
+
+  public setLabel(key: string, value: string): void {
+    this.labels[key] = value;
+  }
+
+  public getLabel(key: string): string | undefined {
+    return this.labels[key];
+  }
+
+  public removeLabel(key: string): boolean {
+    if (key in this.labels) {
+      delete this.labels[key];
+      return true;
+    }
+    return false;
+  }
+
+  public hasLabel(key: string, value?: string): boolean {
+    if (value !== undefined) {
+      return this.labels[key] === value;
+    }
+    return key in this.labels;
+  }
+
+  // ── Overridable hooks (for subclassing) ──────────────
+
+  protected async serviceStart(): Promise<T> {
+    if (this._startFn) {
+      return this._startFn();
+    }
+    throw new Error(`Service '${this.name}': no start function provided. Use withStart() or override serviceStart().`);
+  }
+
+  protected async serviceStop(): Promise<void> {
+    if (this._stopFn) {
+      return this._stopFn(this._instance as T);
+    }
+    // Default: no-op stop is fine (some services don't need explicit cleanup)
+  }
+
+  protected async serviceHealthCheck(): Promise<boolean> {
+    if (this._healthCheckFn) {
+      return this._healthCheckFn(this._instance as T);
+    }
+    // No health check configured — assume healthy if running
+    return this._state === 'running';
+  }
+
+  // ── Lifecycle (called by ServiceManager) ─────────────
+
+  public async start(): Promise<T> {
+    if (this._state === 'running') {
+      return this._instance as T;
+    }
+
+    this.setState('starting');
+
+    try {
+      let result: T;
+      if (this._startupTimeoutMs) {
+        result = await Promise.race([
+          this.serviceStart(),
+          new Promise<never>((_, reject) =>
+            setTimeout(() => reject(new Error(`Service '${this.name}': startup timed out after ${this._startupTimeoutMs}ms`)), this._startupTimeoutMs)
+          ),
+        ]);
+      } else {
+        result = await this.serviceStart();
+      }
+      this._instance = result;
+      this._startedAt = Date.now();
+      this._stoppedAt = undefined;
+      this._consecutiveHealthFailures = 0;
+      this._healthCheckOk = true;
+      this._autoRestartCount = 0;
+      this.setState('running');
+      this.emitEvent('started');
+      this.startHealthCheckTimer();
+      return result;
+    } catch (err) {
+      this._errorCount++;
+      this._lastError = err instanceof Error ? err.message : String(err);
+      this.setState('failed');
+      this.emitEvent('failed', { error: this._lastError });
+      throw err;
+    }
+  }
+
+  public async stop(): Promise<void> {
+    if (this._state === 'stopped' || this._state === 'stopping') {
+      return;
+    }
+
+    this.stopHealthCheckTimer();
+    this.clearAutoRestartTimer();
+    this.setState('stopping');
+
+    try {
+      await this.serviceStop();
+    } catch (err) {
+      logger.log('warn', `Service '${this.name}' error during stop: ${err instanceof Error ? err.message : String(err)}`);
+    }
+
+    this._instance = undefined;
+    this._stoppedAt = Date.now();
+    this.setState('stopped');
+    this.emitEvent('stopped');
+  }
+
+  public async checkHealth(): Promise<boolean | undefined> {
+    if (!this._healthCheckFn && !this.hasOverriddenHealthCheck()) {
+      return undefined;
+    }
+
+    try {
+      const config = this._healthCheckConfig;
+      const timeoutMs = config?.timeoutMs ?? 5000;
+
+      const result = await Promise.race([
+        this.serviceHealthCheck(),
+        new Promise<boolean>((_, reject) =>
+          setTimeout(() => reject(new Error('Health check timed out')), timeoutMs)
+        ),
+      ]);
+
+      this._lastHealthCheck = Date.now();
+      this._healthCheckOk = result;
+
+      if (result) {
+        this._consecutiveHealthFailures = 0;
+        if (this._state === 'degraded') {
+          this.setState('running');
+          this.emitEvent('recovered');
+        }
+      } else {
+        this._consecutiveHealthFailures++;
+        this.handleHealthFailure();
+      }
+
+      this.emitEvent('healthCheck');
+      return result;
+    } catch (err) {
+      this._lastHealthCheck = Date.now();
+      this._healthCheckOk = false;
+      this._consecutiveHealthFailures++;
+      this.handleHealthFailure();
+      this.emitEvent('healthCheck');
+      return false;
+    }
+  }
+
+  // ── Wait / readiness ──────────────────────────────────
+
+  public async waitForState(
+    targetState: TServiceState | TServiceState[],
+    timeoutMs?: number,
+  ): Promise<void> {
+    const states = Array.isArray(targetState) ? targetState : [targetState];
+
+    // Already in target state
+    if (states.includes(this._state)) {
+      return;
+    }
+
+    return new Promise<void>((resolve, reject) => {
+      let timer: ReturnType<typeof setTimeout> | undefined;
+      let settled = false;
+
+      const settle = (fn: () => void) => {
+        if (settled) return;
+        settled = true;
+        subscription.unsubscribe();
+        if (timer) clearTimeout(timer);
+        fn();
+      };
+
+      const subscription = this.eventSubject.subscribe((event) => {
+        if (states.includes(event.state)) {
+          settle(resolve);
+        }
+      });
+
+      // Re-check after subscribing to close the race window
+      if (states.includes(this._state)) {
+        settle(resolve);
+        return;
+      }
+
+      if (timeoutMs !== undefined) {
+        timer = setTimeout(() => {
+          settle(() =>
+            reject(
+              new Error(
+                `Service '${this.name}': timed out waiting for state [${states.join(', ')}] after ${timeoutMs}ms (current: ${this._state})`,
+              ),
+            ),
+          );
+        }, timeoutMs);
+      }
+    });
+  }
+
+  public async waitForRunning(timeoutMs?: number): Promise<void> {
+    return this.waitForState('running', timeoutMs);
+  }
+
+  public async waitForStopped(timeoutMs?: number): Promise<void> {
+    return this.waitForState('stopped', timeoutMs);
+  }
+
+  // ── State ────────────────────────────────────────────
+
+  public get state(): TServiceState {
+    return this._state;
+  }
+
+  public get criticality(): TServiceCriticality {
+    return this._criticality;
+  }
+
+  public get dependencies(): string[] {
+    return [...this._dependencies];
+  }
+
+  public get retryConfig(): IRetryConfig | undefined {
+    return this._retryConfig;
+  }
+
+  public get startupTimeoutMs(): number | undefined {
+    return this._startupTimeoutMs;
+  }
+
+  public get instance(): T | undefined {
+    return this._instance;
+  }
+
+  public get errorCount(): number {
+    return this._errorCount;
+  }
+
+  public get retryCount(): number {
+    return this._retryCount;
+  }
+
+  public set retryCount(value: number) {
+    this._retryCount = value;
+  }
+
+  public getStatus(): IServiceStatus {
+    return {
+      name: this.name,
+      state: this._state,
+      criticality: this._criticality,
+      startedAt: this._startedAt,
+      stoppedAt: this._stoppedAt,
+      lastHealthCheck: this._lastHealthCheck,
+      healthCheckOk: this._healthCheckOk,
+      uptime: this._startedAt && this._state === 'running'
+        ? Date.now() - this._startedAt
+        : undefined,
+      errorCount: this._errorCount,
+      lastError: this._lastError,
+      retryCount: this._retryCount,
+      dependencies: [...this._dependencies],
+      labels: { ...this.labels },
+      hasInstance: this._instance !== undefined,
+    };
+  }
+
+  // ── Internal helpers ─────────────────────────────────
+
+  private setState(state: TServiceState): void {
+    this._state = state;
+  }
+
+  private emitEvent(type: IServiceEvent['type'], extra?: Partial<IServiceEvent>): void {
+    this.eventSubject.next({
+      type,
+      serviceName: this.name,
+      state: this._state,
+      timestamp: Date.now(),
+      ...extra,
+    });
+  }
+
+  private handleHealthFailure(): void {
+    const config = this._healthCheckConfig;
+    const failuresBeforeDegraded = config?.failuresBeforeDegraded ?? 3;
+    const failuresBeforeFailed = config?.failuresBeforeFailed ?? 5;
+
+    if (this._state === 'running' && this._consecutiveHealthFailures >= failuresBeforeDegraded) {
+      this.setState('degraded');
+      this.emitEvent('degraded');
+    }
+
+    if (this._consecutiveHealthFailures >= failuresBeforeFailed) {
+      this.setState('failed');
+      this._lastError = `Health check failed ${this._consecutiveHealthFailures} consecutive times`;
+      this.emitEvent('failed', { error: this._lastError });
+      this.stopHealthCheckTimer();
+
+      // Auto-restart if configured
+      if (config?.autoRestart) {
+        this.scheduleAutoRestart();
+      }
+    }
+  }
+
+  private scheduleAutoRestart(): void {
+    const config = this._healthCheckConfig;
+    const maxRestarts = config?.maxAutoRestarts ?? 3;
+    if (maxRestarts > 0 && this._autoRestartCount >= maxRestarts) {
+      logger.log('warn', `Service '${this.name}': max auto-restarts (${maxRestarts}) exceeded`);
+      return;
+    }
+
+    const baseDelay = config?.autoRestartDelayMs ?? 5000;
+    const factor = config?.autoRestartBackoffFactor ?? 2;
+    const delay = Math.min(baseDelay * Math.pow(factor, this._autoRestartCount), 60000);
+
+    this._autoRestartCount++;
+    this.emitEvent('autoRestarting', { attempt: this._autoRestartCount });
+
+    this._autoRestartTimer = setTimeout(async () => {
+      this._autoRestartTimer = undefined;
+      try {
+        // Stop first to clean up, then start fresh
+        this._instance = undefined;
+        this._stoppedAt = Date.now();
+        this.setState('stopped');
+        await this.start();
+        // Success — reset counter
+        this._autoRestartCount = 0;
+      } catch (err) {
+        logger.log('warn', `Service '${this.name}': auto-restart attempt ${this._autoRestartCount} failed: ${err instanceof Error ? err.message : String(err)}`);
+        // Schedule another attempt
+        this.scheduleAutoRestart();
+      }
+    }, delay);
+    if (this._autoRestartTimer && typeof this._autoRestartTimer === 'object' && 'unref' in this._autoRestartTimer) {
+      (this._autoRestartTimer as any).unref();
+    }
+  }
+
+  private clearAutoRestartTimer(): void {
+    if (this._autoRestartTimer) {
+      clearTimeout(this._autoRestartTimer);
+      this._autoRestartTimer = undefined;
+    }
+  }
+
+  private startHealthCheckTimer(): void {
+    if (!this._healthCheckFn && !this.hasOverriddenHealthCheck()) {
+      return;
+    }
+    const config = this._healthCheckConfig;
+    const intervalMs = config?.intervalMs ?? 30000;
+
+    this.stopHealthCheckTimer();
+
+    const tick = () => {
+      if (this._state !== 'running' && this._state !== 'degraded') {
+        return;
+      }
+      this.checkHealth().catch(() => {});
+      this._healthCheckTimer = setTimeout(tick, intervalMs);
+      if (this._healthCheckTimer && typeof this._healthCheckTimer === 'object' && 'unref' in this._healthCheckTimer) {
+        (this._healthCheckTimer as any).unref();
+      }
+    };
+
+    this._healthCheckTimer = setTimeout(tick, intervalMs);
+    if (this._healthCheckTimer && typeof this._healthCheckTimer === 'object' && 'unref' in this._healthCheckTimer) {
+      (this._healthCheckTimer as any).unref();
+    }
+  }
+
+  private stopHealthCheckTimer(): void {
+    if (this._healthCheckTimer) {
+      clearTimeout(this._healthCheckTimer);
+      this._healthCheckTimer = undefined;
+    }
+  }
+
+  private hasOverriddenHealthCheck(): boolean {
+    return this.serviceHealthCheck !== Service.prototype.serviceHealthCheck;
+  }
+}

ts/taskbuffer.classes.servicemanager.ts

@@ -0,0 +1,430 @@
+import * as plugins from './taskbuffer.plugins.js';
+import { logger } from './taskbuffer.logging.js';
+import { Service } from './taskbuffer.classes.service.js';
+import type {
+  IServiceEvent,
+  IServiceStatus,
+  IServiceManagerOptions,
+  IServiceManagerHealth,
+  IServiceOptions,
+  IRetryConfig,
+  TOverallHealth,
+} from './taskbuffer.interfaces.js';
+
+/**
+ * ServiceManager orchestrates multiple Service instances with:
+ * - Dependency-ordered startup (topological sort, level-by-level parallel)
+ * - Failure isolation (optional services don't crash the system)
+ * - Retry with exponential backoff for failed optional services
+ * - Reverse-dependency-ordered shutdown
+ * - Aggregated health status
+ */
+export class ServiceManager {
+  public readonly name: string;
+  public readonly serviceSubject = new plugins.smartrx.rxjs.Subject<IServiceEvent>();
+
+  private services = new Map<string, Service>();
+  private startupOrder: string[][] = []; // levels of service names
+  private options: Required<IServiceManagerOptions>;
+  private _startedAt: number | undefined;
+  private subscriptions: plugins.smartrx.rxjs.Subscription[] = [];
+
+  constructor(options?: IServiceManagerOptions) {
+    this.name = options?.name || 'ServiceManager';
+    this.options = {
+      name: this.name,
+      defaultRetry: options?.defaultRetry || { maxRetries: 3, baseDelayMs: 1000, maxDelayMs: 30000, backoffFactor: 2 },
+      defaultHealthCheck: options?.defaultHealthCheck || {},
+      startupTimeoutMs: options?.startupTimeoutMs ?? 120000,
+      shutdownTimeoutMs: options?.shutdownTimeoutMs ?? 30000,
+    };
+  }
+
+  // ── Service Registration ─────────────────────────────
+
+  public addService(service: Service): void {
+    if (this.services.has(service.name)) {
+      throw new Error(`Service '${service.name}' is already registered`);
+    }
+    this.services.set(service.name, service);
+
+    // Forward service events to the aggregated subject
+    const sub = service.eventSubject.subscribe((event) => {
+      this.serviceSubject.next(event);
+    });
+    this.subscriptions.push(sub);
+  }
+
+  public addServiceFromOptions<T>(options: IServiceOptions<T>): Service<T> {
+    const service = new Service<T>(options);
+    this.addService(service);
+    return service;
+  }
+
+  public removeService(name: string): void {
+    // Check no other service depends on this one
+    for (const [svcName, svc] of this.services) {
+      if (svc.dependencies.includes(name)) {
+        throw new Error(`Cannot remove service '${name}': service '${svcName}' depends on it`);
+      }
+    }
+    this.services.delete(name);
+  }
+
+  // ── Lifecycle ────────────────────────────────────────
+
+  public async start(): Promise<void> {
+    // Build startup order via topological sort
+    this.startupOrder = this.topologicalSort();
+    this._startedAt = Date.now();
+
+    const startupPromise = this.startAllLevels();
+
+    // Enforce global startup timeout
+    if (this.options.startupTimeoutMs) {
+      await Promise.race([
+        startupPromise,
+        plugins.smartdelay.delayFor(this.options.startupTimeoutMs).then(() => {
+          throw new Error(`${this.name}: global startup timeout exceeded (${this.options.startupTimeoutMs}ms)`);
+        }),
+      ]);
+    } else {
+      await startupPromise;
+    }
+  }
+
+  private async startAllLevels(): Promise<void> {
+    const startedServices: string[] = [];
+
+    logger.log('info', `${this.name}: starting ${this.services.size} services in ${this.startupOrder.length} levels`);
+
+    for (let levelIdx = 0; levelIdx < this.startupOrder.length; levelIdx++) {
+      const level = this.startupOrder[levelIdx];
+      logger.log('info', `${this.name}: starting level ${levelIdx}: [${level.join(', ')}]`);
+
+      const results = await Promise.allSettled(
+        level.map(async (name) => {
+          const service = this.services.get(name)!;
+          try {
+            await this.startServiceWithRetry(service);
+            startedServices.push(name);
+          } catch (err) {
+            if (service.criticality === 'critical') {
+              throw err;
+            }
+            // Optional service — log and continue
+            logger.log('warn', `${this.name}: optional service '${name}' failed to start: ${err instanceof Error ? err.message : String(err)}`);
+          }
+        }),
+      );
+
+      // Check if any critical service failed
+      for (let i = 0; i < results.length; i++) {
+        const result = results[i];
+        if (result.status === 'rejected') {
+          const name = level[i];
+          const service = this.services.get(name);
+          if (service && service.criticality === 'critical') {
+            logger.log('error', `${this.name}: critical service '${name}' failed, aborting startup`);
+            // Rollback: stop all started services in reverse order
+            await this.stopServices(startedServices.reverse());
+            throw new Error(`Critical service '${name}' failed to start: ${result.reason instanceof Error ? result.reason.message : String(result.reason)}`);
+          }
+        }
+      }
+    }
+
+    const statuses = this.getAllStatuses();
+    const running = statuses.filter((s) => s.state === 'running').length;
+    const failed = statuses.filter((s) => s.state === 'failed').length;
+    logger.log('info', `${this.name}: startup complete — ${running} running, ${failed} failed`);
+  }
+
+  public async stop(): Promise<void> {
+    logger.log('info', `${this.name}: stopping all services`);
+
+    // Stop in reverse startup order
+    const reversedLevels = [...this.startupOrder].reverse();
+
+    for (const level of reversedLevels) {
+      const runningInLevel = level.filter((name) => {
+        const svc = this.services.get(name);
+        return svc && svc.state !== 'stopped';
+      });
+
+      if (runningInLevel.length === 0) continue;
+
+      await Promise.allSettled(
+        runningInLevel.map(async (name) => {
+          const service = this.services.get(name)!;
+          try {
+            await Promise.race([
+              service.stop(),
+              plugins.smartdelay.delayFor(this.options.shutdownTimeoutMs).then(() => {
+                throw new Error(`Timeout stopping service '${name}'`);
+              }),
+            ]);
+          } catch (err) {
+            logger.log('warn', `${this.name}: error stopping '${name}': ${err instanceof Error ? err.message : String(err)}`);
+          }
+        }),
+      );
+    }
+
+    // Clean up subscriptions
+    for (const sub of this.subscriptions) {
+      sub.unsubscribe();
+    }
+    this.subscriptions = [];
+
+    this._startedAt = undefined;
+    logger.log('info', `${this.name}: all services stopped`);
+  }
+
+  // ── Querying ─────────────────────────────────────────
+
+  public getService(name: string): Service | undefined {
+    return this.services.get(name);
+  }
+
+  public getServiceStatus(name: string): IServiceStatus | undefined {
+    return this.services.get(name)?.getStatus();
+  }
+
+  public getAllStatuses(): IServiceStatus[] {
+    return Array.from(this.services.values()).map((s) => s.getStatus());
+  }
+
+  public getServicesByLabel(key: string, value: string): Service[] {
+    return Array.from(this.services.values()).filter((s) => s.labels[key] === value);
+  }
+
+  public getServicesStatusByLabel(key: string, value: string): IServiceStatus[] {
+    return this.getServicesByLabel(key, value).map((s) => s.getStatus());
+  }
+
+  public getHealth(): IServiceManagerHealth {
+    const statuses = this.getAllStatuses();
+    let overall: TOverallHealth = 'healthy';
+
+    const hasCriticalDown = statuses.some(
+      (s) => s.criticality === 'critical' && s.state !== 'running' && s.state !== 'stopped',
+    );
+    const hasAnyDown = statuses.some(
+      (s) => s.state !== 'running' && s.state !== 'stopped',
+    );
+
+    if (hasCriticalDown) {
+      overall = 'unhealthy';
+    } else if (hasAnyDown) {
+      overall = 'degraded';
+    }
+
+    return {
+      overall,
+      services: statuses,
+      startedAt: this._startedAt,
+      uptime: this._startedAt ? Date.now() - this._startedAt : undefined,
+    };
+  }
+
+  // ── Runtime Operations ───────────────────────────────
+
+  public async restartService(name: string): Promise<void> {
+    const service = this.services.get(name);
+    if (!service) {
+      throw new Error(`Service '${name}' not found`);
+    }
+
+    // Find all transitive dependents
+    const dependents = this.getTransitiveDependents(name);
+
+    // Stop dependents in reverse dependency order
+    const dependentLevels = this.getLevelsForServices(dependents).reverse();
+    for (const level of dependentLevels) {
+      await Promise.allSettled(
+        level.map((depName) => {
+          const svc = this.services.get(depName);
+          return svc && svc.state !== 'stopped' ? svc.stop() : Promise.resolve();
+        }),
+      );
+    }
+
+    // Stop the target service
+    await service.stop();
+
+    // Start the target service
+    await this.startServiceWithRetry(service);
+
+    // Restart dependents in dependency order
+    const dependentLevelsForward = this.getLevelsForServices(dependents);
+    for (const level of dependentLevelsForward) {
+      await Promise.allSettled(
+        level.map(async (depName) => {
+          const svc = this.services.get(depName)!;
+          try {
+            await this.startServiceWithRetry(svc);
+          } catch (err) {
+            logger.log('warn', `${this.name}: failed to restart dependent '${depName}': ${err instanceof Error ? err.message : String(err)}`);
+          }
+        }),
+      );
+    }
+  }
+
+  // ── Internal helpers ─────────────────────────────────
+
+  private async startServiceWithRetry(service: Service): Promise<void> {
+    const retryConfig = service.retryConfig || this.options.defaultRetry;
+    const maxRetries = retryConfig.maxRetries ?? 3;
+    const baseDelay = retryConfig.baseDelayMs ?? 1000;
+    const maxDelay = retryConfig.maxDelayMs ?? 30000;
+    const factor = retryConfig.backoffFactor ?? 2;
+
+    let lastError: Error | undefined;
+
+    for (let attempt = 0; attempt <= maxRetries; attempt++) {
+      try {
+        await service.start();
+        return;
+      } catch (err) {
+        lastError = err instanceof Error ? err : new Error(String(err));
+        service.retryCount = attempt + 1;
+
+        if (attempt < maxRetries) {
+          const delay = Math.min(baseDelay * Math.pow(factor, attempt), maxDelay);
+          const jitter = 0.8 + Math.random() * 0.4;
+          const actualDelay = Math.floor(delay * jitter);
+
+          service.eventSubject.next({
+            type: 'retrying',
+            serviceName: service.name,
+            state: service.state,
+            timestamp: Date.now(),
+            error: lastError.message,
+            attempt: attempt + 1,
+          });
+
+          logger.log('info', `${this.name}: retrying '${service.name}' in ${actualDelay}ms (attempt ${attempt + 1}/${maxRetries})`);
+          await plugins.smartdelay.delayFor(actualDelay);
+        }
+      }
+    }
+
+    throw lastError!;
+  }
+
+  private async stopServices(names: string[]): Promise<void> {
+    await Promise.allSettled(
+      names.map(async (name) => {
+        const service = this.services.get(name);
+        if (service && service.state !== 'stopped') {
+          try {
+            await service.stop();
+          } catch (err) {
+            logger.log('warn', `${this.name}: error stopping '${name}' during rollback: ${err instanceof Error ? err.message : String(err)}`);
+          }
+        }
+      }),
+    );
+  }
+
+  /**
+   * Topological sort using Kahn's algorithm.
+   * Returns levels of service names — services within a level can start in parallel.
+   */
+  private topologicalSort(): string[][] {
+    const names = new Set(this.services.keys());
+    const inDegree = new Map<string, number>();
+    const dependents = new Map<string, string[]>(); // dep -> services that depend on it
+
+    // Initialize
+    for (const name of names) {
+      inDegree.set(name, 0);
+      dependents.set(name, []);
+    }
+
+    // Build graph
+    for (const [name, service] of this.services) {
+      for (const dep of service.dependencies) {
+        if (!names.has(dep)) {
+          throw new Error(`Service '${name}' depends on '${dep}', which is not registered`);
+        }
+        inDegree.set(name, (inDegree.get(name) || 0) + 1);
+        dependents.get(dep)!.push(name);
+      }
+    }
+
+    // Process level by level
+    const levels: string[][] = [];
+    const remaining = new Set(names);
+
+    while (remaining.size > 0) {
+      const level: string[] = [];
+
+      for (const name of remaining) {
+        if ((inDegree.get(name) || 0) === 0) {
+          level.push(name);
+        }
+      }
+
+      if (level.length === 0) {
+        // Cycle detected
+        const cycleNodes = Array.from(remaining).join(', ');
+        throw new Error(`Circular dependency detected involving services: ${cycleNodes}`);
+      }
+
+      // Remove this level's nodes and update in-degrees
+      for (const name of level) {
+        remaining.delete(name);
+        for (const dependent of dependents.get(name) || []) {
+          inDegree.set(dependent, (inDegree.get(dependent) || 0) - 1);
+        }
+      }
+
+      levels.push(level);
+    }
+
+    return levels;
+  }
+
+  /**
+   * Get all services that transitively depend on the given service.
+   */
+  private getTransitiveDependents(name: string): string[] {
+    const result = new Set<string>();
+    const queue = [name];
+
+    while (queue.length > 0) {
+      const current = queue.shift()!;
+      for (const [svcName, svc] of this.services) {
+        if (svc.dependencies.includes(current) && !result.has(svcName)) {
+          result.add(svcName);
+          queue.push(svcName);
+        }
+      }
+    }
+
+    return Array.from(result);
+  }
+
+  /**
+   * Organize a set of service names into dependency-ordered levels.
+   */
+  private getLevelsForServices(names: string[]): string[][] {
+    if (names.length === 0) return [];
+
+    const nameSet = new Set(names);
+    const levels: string[][] = [];
+
+    // Simple approach: filter the global startup order to include only the given names
+    for (const level of this.startupOrder) {
+      const filtered = level.filter((n) => nameSet.has(n));
+      if (filtered.length > 0) {
+        levels.push(filtered);
+      }
+    }
+
+    return levels;
+  }
+}

ts/taskbuffer.classes.task.ts

@@ -2,7 +2,7 @@ import * as plugins from './taskbuffer.plugins.js';
 import { BufferRunner } from './taskbuffer.classes.bufferrunner.js';
 import { CycleCounter } from './taskbuffer.classes.cyclecounter.js';
 import { TaskStep, type ITaskStep } from './taskbuffer.classes.taskstep.js';
-import type { ITaskMetadata } from './taskbuffer.interfaces.js';
+import type { ITaskMetadata, ITaskEvent, TTaskEventType } from './taskbuffer.interfaces.js';
 
 import { logger } from './taskbuffer.logging.js';
 
@@ -19,18 +19,18 @@ export type TPreOrAfterTaskFunction = () => Task<any>;
 // Type helper to extract step names from array
 export type StepNames<T> = T extends ReadonlyArray<{ name: infer N }> ? N : never;
 
-export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; description: string; percentage: number }> = []> {
+export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; description: string; percentage: number }> = [], TData extends Record<string, unknown> = Record<string, unknown>> {
   public static extractTask<T = undefined, TSteps extends ReadonlyArray<{ name: string; description: string; percentage: number }> = []>(
-    preOrAfterTaskArg: Task<T, TSteps> | TPreOrAfterTaskFunction,
-  ): Task<T, TSteps> {
+    preOrAfterTaskArg: Task<T, TSteps, any> | TPreOrAfterTaskFunction,
+  ): Task<T, TSteps, any> {
     switch (true) {
       case !preOrAfterTaskArg:
         return null;
       case preOrAfterTaskArg instanceof Task:
-        return preOrAfterTaskArg as Task<T, TSteps>;
+        return preOrAfterTaskArg as Task<T, TSteps, any>;
       case typeof preOrAfterTaskArg === 'function':
         const taskFunction = preOrAfterTaskArg as TPreOrAfterTaskFunction;
-        return taskFunction() as unknown as Task<T, TSteps>;
+        return taskFunction() as unknown as Task<T, TSteps, any>;
       default:
         return null;
     }
@@ -42,7 +42,7 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
     return done.promise;
   };
 
-  public static isTask = (taskArg: Task<any>): boolean => {
+  public static isTask = (taskArg: Task<any, any, any>): boolean => {
     if (taskArg instanceof Task && typeof taskArg.taskFunction === 'function') {
       return true;
     } else {
@@ -51,8 +51,8 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
   };
 
   public static isTaskTouched<T = undefined, TSteps extends ReadonlyArray<{ name: string; description: string; percentage: number }> = []>(
-    taskArg: Task<T, TSteps> | TPreOrAfterTaskFunction,
-    touchedTasksArray: Task<T, TSteps>[],
+    taskArg: Task<T, TSteps, any> | TPreOrAfterTaskFunction,
+    touchedTasksArray: Task<T, TSteps, any>[],
   ): boolean {
     const taskToCheck = Task.extractTask(taskArg);
     let result = false;
@@ -65,53 +65,44 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
   }
 
   public static runTask = async <T, TSteps extends ReadonlyArray<{ name: string; description: string; percentage: number }> = []>(
-    taskArg: Task<T, TSteps> | TPreOrAfterTaskFunction,
-    optionsArg: { x?: any; touchedTasksArray?: Task<T, TSteps>[] },
+    taskArg: Task<T, TSteps, any> | TPreOrAfterTaskFunction,
+    optionsArg: { x?: any; touchedTasksArray?: Task<T, TSteps, any>[] },
   ) => {
     const taskToRun = Task.extractTask(taskArg);
     const done = plugins.smartpromise.defer();
 
-    // Wait for all blocking tasks to finish
-    for (const task of taskToRun.blockingTasks) {
-      await task.finished;
-    }
-
     if (!taskToRun.setupValue && taskToRun.taskSetup) {
       taskToRun.setupValue = await taskToRun.taskSetup();
     }
 
-    if (taskToRun.execDelay) {
-      await plugins.smartdelay.delayFor(taskToRun.execDelay);
-    }
-
     taskToRun.running = true;
     taskToRun.runCount++;
     taskToRun.lastRun = new Date();
-    
-    // Reset steps at the beginning of task execution
+
+    // Reset steps and error state at the beginning of task execution
     taskToRun.resetSteps();
+    taskToRun.lastError = undefined;
+    taskToRun.emitEvent('started');
 
-    done.promise.then(async () => {
-      taskToRun.running = false;
-      
-      // Complete all steps when task finishes
-      taskToRun.completeAllSteps();
+    done.promise
+      .then(async () => {
+        taskToRun.running = false;
 
-      // When the task has finished running, resolve the finished promise
-      taskToRun.resolveFinished();
-
-      // Create a new finished promise for the next run
-      taskToRun.finished = new Promise((resolve) => {
-        taskToRun.resolveFinished = resolve;
+        // Complete all steps when task finishes
+        taskToRun.completeAllSteps();
+        taskToRun.emitEvent(taskToRun.lastError ? 'failed' : 'completed');
+      })
+      .catch((err) => {
+        taskToRun.running = false;
+        taskToRun.emitEvent('failed', { error: err instanceof Error ? err.message : String(err) });
       });
-    });
 
     const options = {
       ...{ x: undefined, touchedTasksArray: [] },
       ...optionsArg,
     };
     const x = options.x;
-    const touchedTasksArray: Task<T, TSteps>[] = options.touchedTasksArray;
+    const touchedTasksArray: Task<T, TSteps, any>[] = options.touchedTasksArray;
 
     touchedTasksArray.push(taskToRun);
 
@@ -133,7 +124,13 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
         try {
           return await taskToRun.taskFunction(x, taskToRun.setupValue);
         } catch (e) {
-          console.log(e);
+          taskToRun.lastError = e instanceof Error ? e : new Error(String(e));
+          taskToRun.errorCount++;
+          logger.log('error', `Task "${taskToRun.name || 'unnamed'}" failed: ${taskToRun.lastError.message}`);
+          if (taskToRun.catchErrors) {
+            return undefined;
+          }
+          throw e;
         }
       })
       .then((x) => {
@@ -155,10 +152,18 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
         done.resolve(x);
       })
       .catch((err) => {
-        console.log(err);
+        done.reject(err);
       });
     localDeferred.resolve();
-    return await done.promise;
+
+    try {
+      return await done.promise;
+    } catch (err) {
+      if (taskToRun.catchErrors) {
+        return undefined;
+      }
+      throw err;
+    }
   };
 
   public name: string;
@@ -168,18 +173,12 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
   public cronJob: plugins.smarttime.CronJob;
 
   public bufferMax: number;
-  public execDelay: number;
   public timeout: number;
 
-  public preTask: Task<T, any> | TPreOrAfterTaskFunction;
-  public afterTask: Task<T, any> | TPreOrAfterTaskFunction;
+  public data: TData;
 
-  // Add a list to store the blocking tasks
-  public blockingTasks: Task[] = [];
-
-  // Add a promise that will resolve when the task has finished
-  private finished: Promise<void>;
-  private resolveFinished: () => void;
+  public preTask: Task<T, any, any> | TPreOrAfterTaskFunction;
+  public afterTask: Task<T, any, any> | TPreOrAfterTaskFunction;
 
   public running: boolean = false;
   public bufferRunner = new BufferRunner(this);
@@ -187,10 +186,53 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
   public lastRun?: Date;
   public runCount: number = 0;
 
+  // Error handling
+  public catchErrors: boolean = false;
+  public lastError?: Error;
+  public errorCount: number = 0;
+  public labels: Record<string, string> = {};
+  public readonly eventSubject = new plugins.smartrx.rxjs.Subject<ITaskEvent>();
+
   public get idle() {
     return !this.running;
   }
 
+  public clearError(): void {
+    this.lastError = undefined;
+  }
+
+  public setLabel(key: string, value: string): void {
+    this.labels[key] = value;
+  }
+
+  public getLabel(key: string): string | undefined {
+    return this.labels[key];
+  }
+
+  public removeLabel(key: string): boolean {
+    if (key in this.labels) {
+      delete this.labels[key];
+      return true;
+    }
+    return false;
+  }
+
+  public hasLabel(key: string, value?: string): boolean {
+    if (value !== undefined) {
+      return this.labels[key] === value;
+    }
+    return key in this.labels;
+  }
+
+  private emitEvent(type: TTaskEventType, extra?: Partial<ITaskEvent>): void {
+    this.eventSubject.next({
+      type,
+      task: this.getMetadata(),
+      timestamp: Date.now(),
+      ...extra,
+    });
+  }
+
   public taskSetup: ITaskSetupFunction<T>;
   public setupValue: T;
 
@@ -202,23 +244,27 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
 
   constructor(optionsArg: {
     taskFunction: ITaskFunction<T>;
-    preTask?: Task<T, any> | TPreOrAfterTaskFunction;
-    afterTask?: Task<T, any> | TPreOrAfterTaskFunction;
+    preTask?: Task<T, any, any> | TPreOrAfterTaskFunction;
+    afterTask?: Task<T, any, any> | TPreOrAfterTaskFunction;
     buffered?: boolean;
     bufferMax?: number;
-    execDelay?: number;
     name?: string;
+    data?: TData;
     taskSetup?: ITaskSetupFunction<T>;
     steps?: TSteps;
+    catchErrors?: boolean;
+    labels?: Record<string, string>;
   }) {
     this.taskFunction = optionsArg.taskFunction;
     this.preTask = optionsArg.preTask;
     this.afterTask = optionsArg.afterTask;
     this.buffered = optionsArg.buffered;
     this.bufferMax = optionsArg.bufferMax;
-    this.execDelay = optionsArg.execDelay;
     this.name = optionsArg.name;
+    this.data = optionsArg.data ?? ({} as TData);
     this.taskSetup = optionsArg.taskSetup;
+    this.catchErrors = optionsArg.catchErrors ?? false;
+    this.labels = optionsArg.labels ? { ...optionsArg.labels } : {};
 
     // Initialize steps if provided
     if (optionsArg.steps) {
@@ -232,11 +278,6 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
         this.steps.set(stepConfig.name, step);
       }
     }
-
-    // Create the finished promise
-    this.finished = new Promise((resolve) => {
-      this.resolveFinished = resolve;
-    });
   }
 
   public trigger(x?: any): Promise<any> {
@@ -271,8 +312,8 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
     if (step) {
       step.start();
       this.currentStepName = stepName as string;
-      
-      // Emit event for frontend updates (could be enhanced with event emitter)
+      this.emitEvent('step', { stepName: stepName as string });
+
       if (this.name) {
         logger.log('info', `Task ${this.name}: Starting step "${stepName}" - ${step.description}`);
       }
@@ -306,10 +347,21 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
 
   // Get task metadata
   public getMetadata(): ITaskMetadata {
+    let status: 'idle' | 'running' | 'completed' | 'failed';
+    if (this.running) {
+      status = 'running';
+    } else if (this.lastError) {
+      status = 'failed';
+    } else if (this.runCount > 0) {
+      status = 'completed';
+    } else {
+      status = 'idle';
+    }
+
     return {
       name: this.name || 'unnamed',
       version: this.version,
-      status: this.running ? 'running' : 'idle',
+      status,
       steps: this.getStepsMetadata(),
       currentStep: this.currentStepName,
       currentProgress: this.getProgress(),
@@ -318,6 +370,9 @@ export class Task<T = undefined, TSteps extends ReadonlyArray<{ name: string; de
       bufferMax: this.bufferMax,
       timeout: this.timeout,
       cronSchedule: this.cronJob?.cronExpression,
+      lastError: this.lastError?.message,
+      errorCount: this.errorCount,
+      labels: { ...this.labels },
     };
   }
 

ts/taskbuffer.classes.taskchain.ts

@@ -27,18 +27,20 @@ export class Taskchain extends Task {
           let taskCounter = 0; // counter for iterating async over the taskArray
           const iterateTasks = (x: any) => {
             if (typeof this.taskArray[taskCounter] !== 'undefined') {
-              console.log(
-                this.name + ' running: Task' + this.taskArray[taskCounter].name,
-              );
+              logger.log('info', `${this.name} running: Task ${this.taskArray[taskCounter].name}`);
               this.taskArray[taskCounter].trigger(x).then((x) => {
                 logger.log('info', this.taskArray[taskCounter].name);
                 taskCounter++;
                 iterateTasks(x);
+              }).catch((err) => {
+                const chainError = new Error(
+                  `Taskchain "${this.name}": task "${this.taskArray[taskCounter].name || 'unnamed'}" (index ${taskCounter}) failed: ${err instanceof Error ? err.message : String(err)}`
+                );
+                (chainError as any).cause = err;
+                done.reject(chainError);
               });
             } else {
-              console.log(
-                'Taskchain "' + this.name + '" completed successfully',
-              );
+              logger.log('info', `Taskchain "${this.name}" completed successfully`);
               done.resolve(x);
             }
           };
@@ -53,10 +55,15 @@ export class Taskchain extends Task {
   addTask(taskArg: Task) {
     this.taskArray.push(taskArg);
   }
-  removeTask(taskArg: Task) {
-    // TODO:
+  removeTask(taskArg: Task): boolean {
+    const index = this.taskArray.indexOf(taskArg);
+    if (index === -1) {
+      return false;
+    }
+    this.taskArray.splice(index, 1);
+    return true;
   }
-  shiftTask() {
-    // TODO:
+  shiftTask(): Task | undefined {
+    return this.taskArray.shift();
   }
 }

ts/taskbuffer.classes.taskconstraintgroup.ts

@@ -0,0 +1,164 @@
+import type { Task } from './taskbuffer.classes.task.js';
+import type { ITaskConstraintGroupOptions, IRateLimitConfig, TResultSharingMode } from './taskbuffer.interfaces.js';
+
+export class TaskConstraintGroup<TData extends Record<string, unknown> = Record<string, unknown>> {
+  public name: string;
+  public maxConcurrent: number;
+  public cooldownMs: number;
+  public rateLimit: IRateLimitConfig | null;
+  public resultSharingMode: TResultSharingMode;
+  private constraintKeyForExecution: (task: Task<any, any, TData>, input?: any) => string | null | undefined;
+  private shouldExecuteFn?: (task: Task<any, any, TData>, input?: any) => boolean | Promise<boolean>;
+
+  private runningCounts = new Map<string, number>();
+  private lastCompletionTimes = new Map<string, number>();
+  private completionTimestamps = new Map<string, number[]>();
+  private lastResults = new Map<string, { result: any; timestamp: number }>();
+
+  constructor(options: ITaskConstraintGroupOptions<TData>) {
+    this.name = options.name;
+    this.constraintKeyForExecution = options.constraintKeyForExecution;
+    this.maxConcurrent = options.maxConcurrent ?? Infinity;
+    this.cooldownMs = options.cooldownMs ?? 0;
+    this.shouldExecuteFn = options.shouldExecute;
+    this.rateLimit = options.rateLimit ?? null;
+    this.resultSharingMode = options.resultSharingMode ?? 'none';
+  }
+
+  public getConstraintKey(task: Task<any, any, TData>, input?: any): string | null {
+    const key = this.constraintKeyForExecution(task, input);
+    return key ?? null;
+  }
+
+  public async checkShouldExecute(task: Task<any, any, TData>, input?: any): Promise<boolean> {
+    if (!this.shouldExecuteFn) {
+      return true;
+    }
+    return this.shouldExecuteFn(task, input);
+  }
+
+  public canRun(subGroupKey: string): boolean {
+    const running = this.runningCounts.get(subGroupKey) ?? 0;
+    if (running >= this.maxConcurrent) {
+      return false;
+    }
+
+    if (this.cooldownMs > 0) {
+      const lastCompletion = this.lastCompletionTimes.get(subGroupKey);
+      if (lastCompletion !== undefined) {
+        const elapsed = Date.now() - lastCompletion;
+        if (elapsed < this.cooldownMs) {
+          return false;
+        }
+      }
+    }
+
+    if (this.rateLimit) {
+      this.pruneCompletionTimestamps(subGroupKey);
+      const timestamps = this.completionTimestamps.get(subGroupKey);
+      const completedInWindow = timestamps ? timestamps.length : 0;
+      const running = this.runningCounts.get(subGroupKey) ?? 0;
+      if (completedInWindow + running >= this.rateLimit.maxPerWindow) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  public acquireSlot(subGroupKey: string): void {
+    const current = this.runningCounts.get(subGroupKey) ?? 0;
+    this.runningCounts.set(subGroupKey, current + 1);
+  }
+
+  public releaseSlot(subGroupKey: string): void {
+    const current = this.runningCounts.get(subGroupKey) ?? 0;
+    const next = Math.max(0, current - 1);
+    if (next === 0) {
+      this.runningCounts.delete(subGroupKey);
+    } else {
+      this.runningCounts.set(subGroupKey, next);
+    }
+    this.lastCompletionTimes.set(subGroupKey, Date.now());
+
+    if (this.rateLimit) {
+      const timestamps = this.completionTimestamps.get(subGroupKey) ?? [];
+      timestamps.push(Date.now());
+      this.completionTimestamps.set(subGroupKey, timestamps);
+    }
+  }
+
+  public getCooldownRemaining(subGroupKey: string): number {
+    if (this.cooldownMs <= 0) {
+      return 0;
+    }
+    const lastCompletion = this.lastCompletionTimes.get(subGroupKey);
+    if (lastCompletion === undefined) {
+      return 0;
+    }
+    const elapsed = Date.now() - lastCompletion;
+    return Math.max(0, this.cooldownMs - elapsed);
+  }
+
+  public getRunningCount(subGroupKey: string): number {
+    return this.runningCounts.get(subGroupKey) ?? 0;
+  }
+
+  // Rate limit helpers
+  private pruneCompletionTimestamps(subGroupKey: string): void {
+    const timestamps = this.completionTimestamps.get(subGroupKey);
+    if (!timestamps || !this.rateLimit) return;
+    const cutoff = Date.now() - this.rateLimit.windowMs;
+    let i = 0;
+    while (i < timestamps.length && timestamps[i] <= cutoff) {
+      i++;
+    }
+    if (i > 0) {
+      timestamps.splice(0, i);
+    }
+  }
+
+  public getRateLimitDelay(subGroupKey: string): number {
+    if (!this.rateLimit) return 0;
+    this.pruneCompletionTimestamps(subGroupKey);
+    const timestamps = this.completionTimestamps.get(subGroupKey);
+    const completedInWindow = timestamps ? timestamps.length : 0;
+    const running = this.runningCounts.get(subGroupKey) ?? 0;
+    if (completedInWindow + running < this.rateLimit.maxPerWindow) {
+      return 0;
+    }
+    // If only running tasks fill the window (no completions yet), we can't compute a delay
+    if (!timestamps || timestamps.length === 0) {
+      return 1; // minimal delay; drain will re-check after running tasks complete
+    }
+    // The oldest timestamp in the window determines when a slot opens
+    const oldestInWindow = timestamps[0];
+    const expiry = oldestInWindow + this.rateLimit.windowMs;
+    return Math.max(0, expiry - Date.now());
+  }
+
+  public getNextAvailableDelay(subGroupKey: string): number {
+    return Math.max(this.getCooldownRemaining(subGroupKey), this.getRateLimitDelay(subGroupKey));
+  }
+
+  // Result sharing helpers
+  public recordResult(subGroupKey: string, result: any): void {
+    if (this.resultSharingMode === 'none') return;
+    this.lastResults.set(subGroupKey, { result, timestamp: Date.now() });
+  }
+
+  public getLastResult(subGroupKey: string): { result: any; timestamp: number } | undefined {
+    return this.lastResults.get(subGroupKey);
+  }
+
+  public hasResultSharing(): boolean {
+    return this.resultSharingMode !== 'none';
+  }
+
+  public reset(): void {
+    this.runningCounts.clear();
+    this.lastCompletionTimes.clear();
+    this.completionTimestamps.clear();
+    this.lastResults.clear();
+  }
+}

ts/taskbuffer.classes.taskdebounced.ts

@@ -1,6 +1,7 @@
 import * as plugins from './taskbuffer.plugins.js';
 
 import { Task, type ITaskFunction } from './taskbuffer.classes.task.js';
+import { logger } from './taskbuffer.logging.js';
 
 export class TaskDebounced<T = unknown> extends Task {
   private _debouncedTaskFunction: ITaskFunction;
@@ -22,8 +23,17 @@ export class TaskDebounced<T = unknown> extends Task {
       .pipe(
         plugins.smartrx.rxjs.ops.debounceTime(optionsArg.debounceTimeInMillis),
       )
-      .subscribe((x) => {
-        this.taskFunction(x);
+      .subscribe({
+        next: async (x) => {
+          try {
+            await this.taskFunction(x);
+          } catch (err) {
+            logger.log('error', `TaskDebounced "${this.name || 'unnamed'}" failed: ${err instanceof Error ? err.message : String(err)}`);
+          }
+        },
+        error: (err) => {
+          logger.log('error', `TaskDebounced "${this.name || 'unnamed'}" observable error: ${err instanceof Error ? err.message : String(err)}`);
+        },
       });
   }
 }

ts/taskbuffer.classes.taskmanager.ts

@@ -1,10 +1,12 @@
 import * as plugins from './taskbuffer.plugins.js';
 import { Task } from './taskbuffer.classes.task.js';
+import { TaskConstraintGroup } from './taskbuffer.classes.taskconstraintgroup.js';
 import {
   AbstractDistributedCoordinator,
   type IDistributedTaskRequestResult,
 } from './taskbuffer.classes.distributedcoordinator.js';
-import type { ITaskMetadata, ITaskExecutionReport, IScheduledTaskInfo } from './taskbuffer.interfaces.js';
+import type { ITaskMetadata, ITaskExecutionReport, IScheduledTaskInfo, ITaskEvent, IConstrainedTaskEntry } from './taskbuffer.interfaces.js';
+import { logger } from './taskbuffer.logging.js';
 
 export interface ICronJob {
   cronString: string;
@@ -18,42 +20,230 @@ export interface ITaskManagerConstructorOptions {
 
 export class TaskManager {
   public randomId = plugins.smartunique.shortId();
-  public taskMap = new plugins.lik.ObjectMap<Task<any, any>>();
+  public taskMap = new plugins.lik.ObjectMap<Task<any, any, any>>();
+  public readonly taskSubject = new plugins.smartrx.rxjs.Subject<ITaskEvent>();
+  private taskSubscriptions = new Map<Task<any, any, any>, plugins.smartrx.rxjs.Subscription>();
   private cronJobManager = new plugins.smarttime.CronManager();
   public options: ITaskManagerConstructorOptions = {
     distributedCoordinator: null,
   };
 
+  // Constraint system
+  public constraintGroups: TaskConstraintGroup<any>[] = [];
+  private constraintQueue: IConstrainedTaskEntry[] = [];
+  private drainTimer: ReturnType<typeof setTimeout> | null = null;
+
   constructor(options: ITaskManagerConstructorOptions = {}) {
     this.options = Object.assign(this.options, options);
   }
 
-  public getTaskByName(taskName: string): Task<any, any> {
+  public getTaskByName(taskName: string): Task<any, any, any> {
     return this.taskMap.findSync((task) => task.name === taskName);
   }
 
-  public addTask(task: Task<any, any>): void {
+  public addTask(task: Task<any, any, any>): void {
     if (!task.name) {
       throw new Error('Task must have a name to be added to taskManager');
     }
     this.taskMap.add(task);
+    const subscription = task.eventSubject.subscribe((event) => {
+      this.taskSubject.next(event);
+    });
+    this.taskSubscriptions.set(task, subscription);
   }
 
-  public addAndScheduleTask(task: Task<any, any>, cronString: string) {
+  public removeTask(task: Task<any, any, any>): void {
+    this.taskMap.remove(task);
+    const subscription = this.taskSubscriptions.get(task);
+    if (subscription) {
+      subscription.unsubscribe();
+      this.taskSubscriptions.delete(task);
+    }
+  }
+
+  public addAndScheduleTask(task: Task<any, any, any>, cronString: string) {
     this.addTask(task);
     this.scheduleTaskByName(task.name, cronString);
   }
 
+  // Constraint group management
+  public addConstraintGroup(group: TaskConstraintGroup<any>): void {
+    this.constraintGroups.push(group);
+  }
+
+  public removeConstraintGroup(name: string): void {
+    this.constraintGroups = this.constraintGroups.filter((g) => g.name !== name);
+  }
+
+  // Core constraint evaluation
+  public async triggerTaskConstrained(task: Task<any, any, any>, input?: any): Promise<any> {
+    // Gather applicable constraints
+    const applicableGroups: Array<{ group: TaskConstraintGroup<any>; key: string }> = [];
+    for (const group of this.constraintGroups) {
+      const key = group.getConstraintKey(task, input);
+      if (key !== null) {
+        applicableGroups.push({ group, key });
+      }
+    }
+
+    // No constraints apply → check shouldExecute then trigger directly
+    if (applicableGroups.length === 0) {
+      const shouldRun = await this.checkAllShouldExecute(task, input);
+      if (!shouldRun) {
+        return undefined;
+      }
+      return task.trigger(input);
+    }
+
+    // Check if all constraints allow running
+    const allCanRun = applicableGroups.every(({ group, key }) => group.canRun(key));
+    if (allCanRun) {
+      return this.executeWithConstraintTracking(task, input, applicableGroups);
+    }
+
+    // Blocked → enqueue with deferred promise and cached constraint keys
+    const deferred = plugins.smartpromise.defer<any>();
+    const constraintKeys = new Map<string, string>();
+    for (const { group, key } of applicableGroups) {
+      constraintKeys.set(group.name, key);
+    }
+    this.constraintQueue.push({ task, input, deferred, constraintKeys });
+    return deferred.promise;
+  }
+
+  private async checkAllShouldExecute(task: Task<any, any, any>, input?: any): Promise<boolean> {
+    for (const group of this.constraintGroups) {
+      const shouldRun = await group.checkShouldExecute(task, input);
+      if (!shouldRun) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  private async executeWithConstraintTracking(
+    task: Task<any, any, any>,
+    input: any,
+    groups: Array<{ group: TaskConstraintGroup<any>; key: string }>,
+  ): Promise<any> {
+    // Acquire slots synchronously to prevent race conditions
+    for (const { group, key } of groups) {
+      group.acquireSlot(key);
+    }
+
+    // Check shouldExecute after acquiring slots
+    const shouldRun = await this.checkAllShouldExecute(task, input);
+    if (!shouldRun) {
+      // Release slots and drain queue
+      for (const { group, key } of groups) {
+        group.releaseSlot(key);
+      }
+      this.drainConstraintQueue();
+      return undefined;
+    }
+
+    try {
+      const result = await task.trigger(input);
+      // Record result for groups with result sharing (only on true success, not caught errors)
+      if (!task.lastError) {
+        for (const { group, key } of groups) {
+          group.recordResult(key, result);
+        }
+      }
+      return result;
+    } finally {
+      // Release slots
+      for (const { group, key } of groups) {
+        group.releaseSlot(key);
+      }
+      this.drainConstraintQueue();
+    }
+  }
+
+  private drainConstraintQueue(): void {
+    let shortestCooldown = Infinity;
+    const stillQueued: IConstrainedTaskEntry[] = [];
+
+    for (const entry of this.constraintQueue) {
+      const applicableGroups: Array<{ group: TaskConstraintGroup<any>; key: string }> = [];
+      for (const group of this.constraintGroups) {
+        const key = group.getConstraintKey(entry.task, entry.input);
+        if (key !== null) {
+          applicableGroups.push({ group, key });
+        }
+      }
+
+      // No constraints apply anymore (group removed?) → check shouldExecute then run
+      if (applicableGroups.length === 0) {
+        this.checkAllShouldExecute(entry.task, entry.input).then((shouldRun) => {
+          if (!shouldRun) {
+            entry.deferred.resolve(undefined);
+            return;
+          }
+          entry.task.trigger(entry.input).then(
+            (result) => entry.deferred.resolve(result),
+            (err) => entry.deferred.reject(err),
+          );
+        });
+        continue;
+      }
+
+      // Check result sharing — if any applicable group has a shared result, resolve immediately
+      const sharingGroups = applicableGroups.filter(({ group }) => group.hasResultSharing());
+      if (sharingGroups.length > 0) {
+        const groupWithResult = sharingGroups.find(({ group, key }) =>
+          group.getLastResult(key) !== undefined
+        );
+        if (groupWithResult) {
+          entry.deferred.resolve(groupWithResult.group.getLastResult(groupWithResult.key)!.result);
+          continue;
+        }
+      }
+
+      const allCanRun = applicableGroups.every(({ group, key }) => group.canRun(key));
+      if (allCanRun) {
+        // executeWithConstraintTracking handles shouldExecute check internally
+        this.executeWithConstraintTracking(entry.task, entry.input, applicableGroups).then(
+          (result) => entry.deferred.resolve(result),
+          (err) => entry.deferred.reject(err),
+        );
+      } else {
+        stillQueued.push(entry);
+        // Track shortest delay for timer scheduling (cooldown + rate limit)
+        for (const { group, key } of applicableGroups) {
+          const remaining = group.getNextAvailableDelay(key);
+          if (remaining > 0 && remaining < shortestCooldown) {
+            shortestCooldown = remaining;
+          }
+        }
+      }
+    }
+
+    this.constraintQueue = stillQueued;
+
+    // Schedule next drain if there are cooldown-blocked entries
+    if (this.drainTimer) {
+      clearTimeout(this.drainTimer);
+      this.drainTimer = null;
+    }
+    if (stillQueued.length > 0 && shortestCooldown < Infinity) {
+      this.drainTimer = setTimeout(() => {
+        this.drainTimer = null;
+        this.drainConstraintQueue();
+      }, shortestCooldown + 1);
+    }
+  }
+
   public async triggerTaskByName(taskName: string): Promise<any> {
     const taskToTrigger = this.getTaskByName(taskName);
     if (!taskToTrigger) {
       throw new Error(`No task with the name ${taskName} found.`);
     }
-    return taskToTrigger.trigger();
+    return this.triggerTaskConstrained(taskToTrigger);
   }
 
-  public async triggerTask(task: Task<any, any>) {
-    return task.trigger();
+  public async triggerTask(task: Task<any, any, any>) {
+    return this.triggerTaskConstrained(task);
   }
 
   public scheduleTaskByName(taskName: string, cronString: string) {
@@ -64,7 +254,7 @@ export class TaskManager {
     this.handleTaskScheduling(taskToSchedule, cronString);
   }
 
-  private handleTaskScheduling(task: Task<any, any>, cronString: string) {
+  private handleTaskScheduling(task: Task<any, any, any>, cronString: string) {
     const cronJob = this.cronJobManager.addCronjob(
       cronString,
       async (triggerTime: number) => {
@@ -75,31 +265,35 @@ export class TaskManager {
             triggerTime,
           );
           if (!announcementResult.shouldTrigger) {
-            console.log('Distributed coordinator result: NOT EXECUTING');
+            logger.log('info', 'Distributed coordinator result: NOT EXECUTING');
             return;
           } else {
-            console.log('Distributed coordinator result: CHOSEN AND EXECUTING');
+            logger.log('info', 'Distributed coordinator result: CHOSEN AND EXECUTING');
           }
         }
-        await task.trigger();
+        try {
+          await this.triggerTaskConstrained(task);
+        } catch (err) {
+          logger.log('error', `TaskManager: scheduled task "${task.name || 'unnamed'}" failed: ${err instanceof Error ? err.message : String(err)}`);
+        }
       },
     );
     task.cronJob = cronJob;
   }
 
-  private logTaskState(task: Task<any, any>) {
-    console.log(`Taskbuffer schedule triggered task >>${task.name}<<`);
+  private logTaskState(task: Task<any, any, any>) {
+    logger.log('info', `Taskbuffer schedule triggered task >>${task.name}<<`);
     const bufferState = task.buffered
       ? `buffered with max ${task.bufferMax} buffered calls`
       : `unbuffered`;
-    console.log(`Task >>${task.name}<< is ${bufferState}`);
+    logger.log('info', `Task >>${task.name}<< is ${bufferState}`);
   }
 
   private async performDistributedConsultation(
-    task: Task<any, any>,
+    task: Task<any, any, any>,
     triggerTime: number,
   ): Promise<IDistributedTaskRequestResult> {
-    console.log('Found a distributed coordinator, performing consultation.');
+    logger.log('info', 'Found a distributed coordinator, performing consultation.');
 
     return this.options.distributedCoordinator.fireDistributedTaskRequest({
       submitterId: this.randomId,
@@ -124,7 +318,7 @@ export class TaskManager {
     }
   }
 
-  public async descheduleTask(task: Task<any, any>) {
+  public async descheduleTask(task: Task<any, any, any>) {
     await this.descheduleTaskByName(task.name);
   }
 
@@ -145,6 +339,14 @@ export class TaskManager {
     if (this.options.distributedCoordinator) {
       await this.options.distributedCoordinator.stop();
     }
+    for (const [, subscription] of this.taskSubscriptions) {
+      subscription.unsubscribe();
+    }
+    this.taskSubscriptions.clear();
+    if (this.drainTimer) {
+      clearTimeout(this.drainTimer);
+      this.drainTimer = null;
+    }
   }
 
   // Get metadata for a specific task
@@ -162,7 +364,7 @@ export class TaskManager {
   // Get scheduled tasks with their schedules and next run times
   public getScheduledTasks(): IScheduledTaskInfo[] {
     const scheduledTasks: IScheduledTaskInfo[] = [];
-    
+
     for (const task of this.taskMap.getArray()) {
       if (task.cronJob) {
         scheduledTasks.push({
@@ -175,7 +377,7 @@ export class TaskManager {
         });
       }
     }
-    
+
     return scheduledTasks;
   }
 
@@ -189,13 +391,21 @@ export class TaskManager {
       }))
       .sort((a, b) => a.nextRun.getTime() - b.nextRun.getTime())
       .slice(0, limit);
-    
+
     return scheduledRuns;
   }
 
+  public getTasksByLabel(key: string, value: string): Task<any, any, any>[] {
+    return this.taskMap.getArray().filter(task => task.labels[key] === value);
+  }
+
+  public getTasksMetadataByLabel(key: string, value: string): ITaskMetadata[] {
+    return this.getTasksByLabel(key, value).map(task => task.getMetadata());
+  }
+
   // Add, execute, and remove a task while collecting metadata
   public async addExecuteRemoveTask<T, TSteps extends ReadonlyArray<{ name: string; description: string; percentage: number }>>(
-    task: Task<T, TSteps>,
+    task: Task<T, TSteps, any>,
     options?: {
       schedule?: string;
       trackProgress?: boolean;
@@ -203,19 +413,18 @@ export class TaskManager {
   ): Promise<ITaskExecutionReport> {
     // Add task to manager
     this.addTask(task);
-    
+
     // Optionally schedule it
     if (options?.schedule) {
       this.scheduleTaskByName(task.name!, options.schedule);
     }
-    
+
     const startTime = Date.now();
-    const progressUpdates: Array<{ stepName: string; timestamp: number }> = [];
-    
+
     try {
-      // Execute the task
-      const result = await task.trigger();
-      
+      // Execute the task through constraints
+      const result = await this.triggerTaskConstrained(task);
+
       // Collect execution report
       const report: ITaskExecutionReport = {
         taskName: task.name || 'unnamed',
@@ -229,15 +438,15 @@ export class TaskManager {
         progress: task.getProgress(),
         result,
       };
-      
+
       // Remove task from manager
-      this.taskMap.remove(task);
-      
+      this.removeTask(task);
+
       // Deschedule if it was scheduled
       if (options?.schedule && task.name) {
         this.descheduleTaskByName(task.name);
       }
-      
+
       return report;
     } catch (error) {
       // Create error report
@@ -253,15 +462,15 @@ export class TaskManager {
         progress: task.getProgress(),
         error: error as Error,
       };
-      
+
       // Remove task from manager even on error
-      this.taskMap.remove(task);
-      
+      this.removeTask(task);
+
       // Deschedule if it was scheduled
       if (options?.schedule && task.name) {
         this.descheduleTaskByName(task.name);
       }
-      
+
       throw errorReport;
     }
   }

ts/taskbuffer.classes.taskparallel.ts

@@ -13,7 +13,9 @@ export class Taskparallel extends Task {
           this.taskArray.forEach(function (taskArg) {
             promiseArray.push(taskArg.trigger());
           });
-          Promise.all(promiseArray).then(done.resolve);
+          Promise.all(promiseArray)
+            .then((results) => done.resolve(results))
+            .catch((err) => done.reject(err));
           return done.promise;
         },
       },

ts/taskbuffer.classes.taskrunner.ts

@@ -1,64 +0,0 @@
-import * as plugins from './taskbuffer.plugins.js';
-
-import { Task } from './taskbuffer.classes.task.js';
-
-export class TaskRunner {
-  public maxParrallelJobs: number = 1;
-  public status: 'stopped' | 'running' = 'stopped';
-  public runningTasks: plugins.lik.ObjectMap<Task> =
-    new plugins.lik.ObjectMap<Task>();
-  public qeuedTasks: Task[] = [];
-
-  constructor() {
-    this.runningTasks.eventSubject.subscribe(async (eventArg) => {
-      this.checkExecution();
-    });
-  }
-
-  /**
-   * adds a task to the qeue
-   */
-  public addTask(taskArg: Task) {
-    this.qeuedTasks.push(taskArg);
-    this.checkExecution();
-  }
-
-  /**
-   * set amount of parallel tasks
-   * be careful, you might loose dependability of tasks
-   */
-  public setMaxParallelJobs(maxParrallelJobsArg: number) {
-    this.maxParrallelJobs = maxParrallelJobsArg;
-  }
-
-  /**
-   * starts the task queue
-   */
-  public async start() {
-    this.status = 'running';
-  }
-
-  /**
-   * checks wether execution is on point
-   */
-  public async checkExecution() {
-    if (
-      this.runningTasks.getArray().length < this.maxParrallelJobs &&
-      this.status === 'running' &&
-      this.qeuedTasks.length > 0
-    ) {
-      const nextJob = this.qeuedTasks.shift();
-      this.runningTasks.add(nextJob);
-      await nextJob.trigger();
-      this.runningTasks.remove(nextJob);
-      this.checkExecution();
-    }
-  }
-
-  /**
-   * stops the task queue
-   */
-  public async stop() {
-    this.status = 'stopped';
-  }
-}

ts/taskbuffer.interfaces.ts

@@ -1,4 +1,34 @@
 import type { ITaskStep } from './taskbuffer.classes.taskstep.js';
+import type { Task } from './taskbuffer.classes.task.js';
+
+export interface IRateLimitConfig {
+  maxPerWindow: number;  // max completions allowed within the sliding window
+  windowMs: number;      // sliding window duration in ms
+}
+
+export type TResultSharingMode = 'none' | 'share-latest';
+
+export interface ITaskConstraintGroupOptions<TData extends Record<string, unknown> = Record<string, unknown>> {
+  name: string;
+  constraintKeyForExecution: (task: Task<any, any, TData>, input?: any) => string | null | undefined;
+  maxConcurrent?: number;  // default: Infinity
+  cooldownMs?: number;     // default: 0
+  shouldExecute?: (task: Task<any, any, TData>, input?: any) => boolean | Promise<boolean>;
+  rateLimit?: IRateLimitConfig;
+  resultSharingMode?: TResultSharingMode;  // default: 'none'
+}
+
+export interface ITaskExecution<TData extends Record<string, unknown> = Record<string, unknown>> {
+  task: Task<any, any, TData>;
+  input: any;
+}
+
+export interface IConstrainedTaskEntry {
+  task: Task<any, any, any>;
+  input: any;
+  deferred: import('@push.rocks/smartpromise').Deferred<any>;
+  constraintKeys: Map<string, string>;  // groupName -> key
+}
 
 export interface ITaskMetadata {
   name: string;
@@ -15,6 +45,9 @@ export interface ITaskMetadata {
   buffered?: boolean;
   bufferMax?: number;
   timeout?: number;
+  lastError?: string;
+  errorCount?: number;
+  labels?: Record<string, string>;
 }
 
 export interface ITaskExecutionReport {
@@ -36,4 +69,124 @@ export interface IScheduledTaskInfo {
   lastRun?: Date;
   steps?: ITaskStep[];
   metadata?: ITaskMetadata;
+}
+
+export type TTaskEventType = 'started' | 'step' | 'completed' | 'failed';
+
+export interface ITaskEvent {
+  type: TTaskEventType;
+  task: ITaskMetadata;
+  timestamp: number;
+  stepName?: string;   // present when type === 'step'
+  error?: string;      // present when type === 'failed'
+}
+
+// ── Service Lifecycle Types ──────────────────────────────────────
+
+export type TServiceState =
+  | 'stopped'
+  | 'starting'
+  | 'running'
+  | 'degraded'
+  | 'failed'
+  | 'stopping';
+
+export type TServiceCriticality = 'critical' | 'optional';
+
+export type TServiceEventType =
+  | 'started'
+  | 'stopped'
+  | 'failed'
+  | 'degraded'
+  | 'recovered'
+  | 'retrying'
+  | 'healthCheck'
+  | 'autoRestarting';
+
+export interface IServiceEvent {
+  type: TServiceEventType;
+  serviceName: string;
+  state: TServiceState;
+  timestamp: number;
+  error?: string;
+  attempt?: number;
+}
+
+export interface IServiceStatus {
+  name: string;
+  state: TServiceState;
+  criticality: TServiceCriticality;
+  startedAt?: number;
+  stoppedAt?: number;
+  lastHealthCheck?: number;
+  healthCheckOk?: boolean;
+  uptime?: number;
+  errorCount: number;
+  lastError?: string;
+  retryCount: number;
+  dependencies: string[];
+  labels?: Record<string, string>;
+  hasInstance?: boolean;
+}
+
+export interface IRetryConfig {
+  /** Maximum retry attempts. 0 = no retries. Default: 3 */
+  maxRetries?: number;
+  /** Base delay in ms. Default: 1000 */
+  baseDelayMs?: number;
+  /** Maximum delay cap in ms. Default: 30000 */
+  maxDelayMs?: number;
+  /** Multiplier per attempt. Default: 2 */
+  backoffFactor?: number;
+}
+
+export interface IHealthCheckConfig {
+  /** Interval in ms between health checks. Default: 30000 */
+  intervalMs?: number;
+  /** Timeout for a single health check call. Default: 5000 */
+  timeoutMs?: number;
+  /** Consecutive failures before marking degraded. Default: 3 */
+  failuresBeforeDegraded?: number;
+  /** Consecutive failures before marking failed. Default: 5 */
+  failuresBeforeFailed?: number;
+  /** Auto-restart the service when it transitions to failed. Default: false */
+  autoRestart?: boolean;
+  /** Maximum number of auto-restart attempts. 0 = unlimited. Default: 3 */
+  maxAutoRestarts?: number;
+  /** Base delay in ms before first auto-restart. Default: 5000 */
+  autoRestartDelayMs?: number;
+  /** Backoff multiplier per auto-restart attempt. Default: 2 */
+  autoRestartBackoffFactor?: number;
+}
+
+export interface IServiceOptions<T = any> {
+  name: string;
+  start: () => Promise<T>;
+  stop: (instance: T) => Promise<void>;
+  healthCheck?: (instance: T) => Promise<boolean>;
+  criticality?: TServiceCriticality;
+  dependencies?: string[];
+  retry?: IRetryConfig;
+  healthCheckConfig?: IHealthCheckConfig;
+  startupTimeoutMs?: number;
+  labels?: Record<string, string>;
+}
+
+export interface IServiceManagerOptions {
+  name?: string;
+  defaultRetry?: IRetryConfig;
+  defaultHealthCheck?: IHealthCheckConfig;
+  /** Timeout in ms for the entire startup sequence. Default: 120000 */
+  startupTimeoutMs?: number;
+  /** Timeout in ms for the entire shutdown sequence. Default: 30000 */
+  shutdownTimeoutMs?: number;
+}
+
+export type TOverallHealth = 'healthy' | 'degraded' | 'unhealthy';
+
+export interface IServiceManagerHealth {
+  overall: TOverallHealth;
+  services: IServiceStatus[];
+  startedAt?: number;
+  uptime?: number;
 }

ts_web/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/taskbuffer',
-  version: '3.2.0',
+  version: '8.0.0',
   description: 'A flexible task management library supporting TypeScript, allowing for task buffering, scheduling, and execution with dependency management.'
 }

ts_web/elements/taskbuffer-dashboard.demo.ts

@@ -0,0 +1,311 @@
+import { html, css, cssManager } from '@design.estate/dees-element';
+import { TaskManager, Task } from '../../ts/index.js';
+import '../taskbuffer-dashboard.js';
+
+export const demoFunc = () => html`
+  <style>
+    ${css`
+      .demoWrapper {
+        box-sizing: border-box;
+        position: relative;
+        width: 100%;
+        min-height: 100vh;
+        padding: 48px;
+        background: ${cssManager.bdTheme('#f8f9fa', '#0a0a0a')};
+      }
+      
+      h1 {
+        font-size: 32px;
+        font-weight: 700;
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
+        margin-bottom: 12px;
+        text-align: center;
+      }
+      
+      p {
+        font-size: 16px;
+        color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};
+        text-align: center;
+        margin-bottom: 48px;
+      }
+    `}
+  </style>
+  
+  <div class="demoWrapper">
+    <h1>TaskBuffer Dashboard Demo</h1>
+    <p>Real-time visualization of task execution, progress tracking, and scheduling</p>
+    
+    <dees-demowrapper 
+      .title=${'Live Dashboard'}
+      .subtitle=${'Interactive task management dashboard with real-time updates'}
+      .runAfterRender=${async (element) => {
+        // Create TaskManager instance
+        const taskManager = new TaskManager();
+        
+        // Get dashboard element
+        const dashboard = element.querySelector('taskbuffer-dashboard');
+        dashboard.taskManager = taskManager;
+        dashboard.refreshInterval = 500;
+        
+        // Task counter for unique names
+        let taskCounter = 0;
+        
+        // Helper to create random delay
+        const randomDelay = () => new Promise(resolve => 
+          setTimeout(resolve, Math.random() * 2000 + 500)
+        );
+        
+        // Add initial demo tasks
+        const addDemoTasks = () => {
+          // Add simple task
+          const simpleTask = new Task({
+            name: `SimpleTask_${++taskCounter}`,
+            taskFunction: async () => {
+              console.log(`Executing SimpleTask_${taskCounter}`);
+              await randomDelay();
+              return `Result from SimpleTask_${taskCounter}`;
+            }
+          });
+          taskManager.addTask(simpleTask);
+          
+          // Add task with steps
+          const steppedTask = new Task({
+            name: `SteppedTask_${++taskCounter}`,
+            steps: [
+              { name: 'init', description: 'Initializing', percentage: 20 },
+              { name: 'fetch', description: 'Fetching data', percentage: 30 },
+              { name: 'process', description: 'Processing', percentage: 35 },
+              { name: 'save', description: 'Saving results', percentage: 15 }
+            ],
+            taskFunction: async function() {
+              this.notifyStep('init');
+              await randomDelay();
+              this.notifyStep('fetch');
+              await randomDelay();
+              this.notifyStep('process');
+              await randomDelay();
+              this.notifyStep('save');
+              await randomDelay();
+              return `Completed SteppedTask_${taskCounter}`;
+            }
+          });
+          taskManager.addTask(steppedTask);
+          
+          // Add buffered task
+          const bufferedTask = new Task({
+            name: `BufferedTask_${++taskCounter}`,
+            buffered: true,
+            bufferMax: 3,
+            steps: [
+              { name: 'buffer', description: 'Processing buffered item', percentage: 100 }
+            ],
+            taskFunction: async function(item) {
+              this.notifyStep('buffer');
+              console.log(`Processing buffered item: ${item}`);
+              await randomDelay();
+              return `Buffered task ${taskCounter} processed: ${item}`;
+            }
+          });
+          taskManager.addTask(bufferedTask);
+        };
+        
+        // Add initial tasks
+        addDemoTasks();
+        
+        // Automatically trigger some tasks
+        setTimeout(() => {
+          const tasks = taskManager.getAllTasksMetadata();
+          tasks.forEach(taskMeta => {
+            const task = taskManager.getTaskByName(taskMeta.name);
+            if (task && !taskMeta.name.includes('Scheduled')) {
+              if (taskMeta.buffered) {
+                // Trigger buffered task multiple times
+                for (let i = 0; i < 5; i++) {
+                  task.trigger(`Data_${i}`);
+                }
+              } else {
+                task.trigger();
+              }
+            }
+          });
+        }, 2000);
+      }}
+    >
+      <taskbuffer-dashboard></taskbuffer-dashboard>
+    </dees-demowrapper>
+    
+    <dees-demowrapper
+      .title=${'Scheduled Tasks'}
+      .subtitle=${'Tasks scheduled with cron expressions'}
+      .runAfterRender=${async (element) => {
+        // Create TaskManager instance
+        const taskManager = new TaskManager();
+        
+        // Get dashboard element
+        const dashboard = element.querySelector('taskbuffer-dashboard');
+        dashboard.taskManager = taskManager;
+        dashboard.refreshInterval = 1000;
+        
+        // Add scheduled tasks
+        const scheduledTask1 = new Task({
+          name: 'HourlyBackup',
+          steps: [
+            { name: 'prepare', description: 'Preparing backup', percentage: 30 },
+            { name: 'backup', description: 'Creating backup', percentage: 50 },
+            { name: 'verify', description: 'Verifying backup', percentage: 20 }
+          ],
+          taskFunction: async function() {
+            this.notifyStep('prepare');
+            await new Promise(resolve => setTimeout(resolve, 1000));
+            this.notifyStep('backup');
+            await new Promise(resolve => setTimeout(resolve, 2000));
+            this.notifyStep('verify');
+            await new Promise(resolve => setTimeout(resolve, 500));
+            return 'Backup completed';
+          }
+        });
+        
+        const scheduledTask2 = new Task({
+          name: 'DailyReport',
+          steps: [
+            { name: 'collect', description: 'Collecting data', percentage: 40 },
+            { name: 'analyze', description: 'Analyzing data', percentage: 40 },
+            { name: 'send', description: 'Sending report', percentage: 20 }
+          ],
+          taskFunction: async function() {
+            this.notifyStep('collect');
+            await new Promise(resolve => setTimeout(resolve, 1500));
+            this.notifyStep('analyze');
+            await new Promise(resolve => setTimeout(resolve, 1500));
+            this.notifyStep('send');
+            await new Promise(resolve => setTimeout(resolve, 500));
+            return 'Report sent';
+          }
+        });
+        
+        // Schedule tasks
+        taskManager.addAndScheduleTask(scheduledTask1, '0 * * * *'); // Every hour
+        taskManager.addAndScheduleTask(scheduledTask2, '0 0 * * *'); // Daily at midnight
+        
+        // Also add them as regular tasks for demo
+        const demoTask = new Task({
+          name: 'DemoScheduledExecution',
+          steps: [
+            { name: 'execute', description: 'Simulating scheduled execution', percentage: 100 }
+          ],
+          taskFunction: async function() {
+            this.notifyStep('execute');
+            await new Promise(resolve => setTimeout(resolve, 1000));
+            
+            // Trigger scheduled tasks for demo
+            scheduledTask1.trigger();
+            scheduledTask2.trigger();
+            
+            return 'Triggered scheduled tasks for demo';
+          }
+        });
+        taskManager.addTask(demoTask);
+        
+        // Trigger demo after 2 seconds
+        setTimeout(() => {
+          demoTask.trigger();
+        }, 2000);
+      }}
+    >
+      <taskbuffer-dashboard></taskbuffer-dashboard>
+    </dees-demowrapper>
+    
+    <dees-demowrapper
+      .title=${'Task Execution Control'}
+      .subtitle=${'Interactive controls for task management'}
+      .runAfterRender=${async (element) => {
+        // Create TaskManager instance
+        const taskManager = new TaskManager();
+        
+        // Get dashboard element
+        const dashboard = element.querySelector('taskbuffer-dashboard');
+        dashboard.taskManager = taskManager;
+        dashboard.refreshInterval = 300;
+        
+        // Add control buttons
+        const controlsDiv = document.createElement('div');
+        controlsDiv.style.cssText = `
+          display: flex;
+          gap: 8px;
+          margin-bottom: 16px;
+          flex-wrap: wrap;
+        `;
+        
+        const createButton = (text, onClick, style = '') => {
+          const button = document.createElement('button');
+          button.textContent = text;
+          button.style.cssText = `
+            padding: 8px 16px;
+            border: none;
+            border-radius: 6px;
+            cursor: pointer;
+            font-size: 14px;
+            transition: all 0.2s;
+            ${style}
+          `;
+          button.onclick = onClick;
+          return button;
+        };
+        
+        let taskCounter = 0;
+        
+        // Add task button
+        controlsDiv.appendChild(createButton('Add Task', () => {
+          const task = new Task({
+            name: `Task_${++taskCounter}`,
+            steps: [
+              { name: 'step1', description: 'Step 1', percentage: 33 },
+              { name: 'step2', description: 'Step 2', percentage: 33 },
+              { name: 'step3', description: 'Step 3', percentage: 34 }
+            ],
+            taskFunction: async function() {
+              for (const step of ['step1', 'step2', 'step3']) {
+                this.notifyStep(step);
+                await new Promise(resolve => setTimeout(resolve, 1000));
+              }
+              return `Task_${taskCounter} completed`;
+            }
+          });
+          taskManager.addTask(task);
+        }, 'background: #3b82f6; color: white;'));
+        
+        // Trigger all button
+        controlsDiv.appendChild(createButton('Trigger All', () => {
+          const tasks = taskManager.getAllTasksMetadata();
+          tasks.forEach(taskMeta => {
+            const task = taskManager.getTaskByName(taskMeta.name);
+            if (task) {
+              task.trigger();
+            }
+          });
+        }, 'background: #22c55e; color: white;'));
+        
+        // Clear all button
+        controlsDiv.appendChild(createButton('Clear All', () => {
+          const tasks = taskManager.getAllTasksMetadata();
+          tasks.forEach(taskMeta => {
+            const task = taskManager.getTaskByName(taskMeta.name);
+            if (task) {
+              taskManager.taskMap.remove(task);
+              taskManager.descheduleTaskByName(taskMeta.name);
+            }
+          });
+        }, 'background: #ef4444; color: white;'));
+        
+        element.insertBefore(controlsDiv, dashboard);
+        
+        // Add some initial tasks
+        for (let i = 0; i < 3; i++) {
+          controlsDiv.querySelector('button').click();
+        }
+      }}
+    >
+      <taskbuffer-dashboard></taskbuffer-dashboard>
+    </dees-demowrapper>
+  </div>
+`;

ts_web/index.ts

@@ -0,0 +1,12 @@
+// Export web components
+export * from './taskbuffer-dashboard.js';
+
+// Export types from main module for web usage
+export type { 
+  TaskManager, 
+  Task,
+  ITaskMetadata, 
+  ITaskExecutionReport,
+  IScheduledTaskInfo,
+  ITaskStep 
+} from '../ts/index.js';

ts_web/taskbuffer-dashboard.ts

@@ -0,0 +1,541 @@
+import { DeesElement, customElement, html, css, property, state, cssManager } from '@design.estate/dees-element';
+import type { TaskManager, ITaskMetadata, IScheduledTaskInfo } from '../ts/index.js';
+
+/**
+ * A web component that displays TaskManager tasks with progress visualization
+ */
+@customElement('taskbuffer-dashboard')
+export class TaskbufferDashboard extends DeesElement {
+  // Properties
+  @property({ type: Object })
+  accessor taskManager: TaskManager | null = null;
+
+  @property({ type: Number })
+  accessor refreshInterval: number = 1000; // milliseconds
+
+  // Internal state
+  @state()
+  accessor tasks: ITaskMetadata[] = [];
+
+  @state()
+  accessor scheduledTasks: IScheduledTaskInfo[] = [];
+
+  @state()
+  accessor isRunning: boolean = false;
+
+  private refreshTimer: any;
+
+  // Styles
+  static styles = [
+    cssManager.defaultStyles,
+    css`
+      :host {
+        display: block;
+        font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+      }
+
+      .dashboard-container {
+        padding: 24px;
+        background: ${cssManager.bdTheme('#ffffff', '#0a0a0a')};
+        min-height: 100vh;
+      }
+
+      .dashboard-header {
+        margin-bottom: 32px;
+      }
+
+      .dashboard-title {
+        font-size: 28px;
+        font-weight: 700;
+        color: ${cssManager.bdTheme('#09090b', '#fafafa')};
+        margin-bottom: 8px;
+        display: flex;
+        align-items: center;
+        gap: 12px;
+      }
+
+      .status-indicator {
+        width: 12px;
+        height: 12px;
+        border-radius: 50%;
+        background: ${cssManager.bdTheme('#22c55e', '#22c55e')};
+        animation: pulse 2s infinite;
+      }
+
+      .status-indicator.inactive {
+        background: ${cssManager.bdTheme('#94a3b8', '#475569')};
+        animation: none;
+      }
+
+      @keyframes pulse {
+        0%, 100% {
+          opacity: 1;
+        }
+        50% {
+          opacity: 0.5;
+        }
+      }
+
+      .dashboard-subtitle {
+        font-size: 14px;
+        color: ${cssManager.bdTheme('#71717a', '#a1a1aa')};
+      }
+
+      .tasks-section {
+        margin-bottom: 48px;
+      }
+
+      .section-title {
+        font-size: 20px;
+        font-weight: 600;
+        color: ${cssManager.bdTheme('#18181b', '#e4e4e7')};
+        margin-bottom: 16px;
+      }
+
+      .tasks-grid {
+        display: grid;
+        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
+        gap: 16px;
+      }
+
+      .task-card {
+        background: ${cssManager.bdTheme('#f8fafc', '#18181b')};
+        border: 1px solid ${cssManager.bdTheme('#e2e8f0', '#27272a')};
+        border-radius: 12px;
+        padding: 20px;
+        transition: all 0.2s ease;
+      }
+
+      .task-card:hover {
+        transform: translateY(-2px);
+        box-shadow: 0 4px 12px ${cssManager.bdTheme('rgba(0,0,0,0.1)', 'rgba(0,0,0,0.3)')};
+      }
+
+      .task-header {
+        display: flex;
+        justify-content: space-between;
+        align-items: flex-start;
+        margin-bottom: 12px;
+      }
+
+      .task-name {
+        font-size: 16px;
+        font-weight: 600;
+        color: ${cssManager.bdTheme('#0f172a', '#f1f5f9')};
+      }
+
+      .task-status {
+        display: inline-block;
+        padding: 4px 8px;
+        border-radius: 6px;
+        font-size: 11px;
+        font-weight: 600;
+        text-transform: uppercase;
+        letter-spacing: 0.5px;
+      }
+
+      .task-status.idle {
+        background: ${cssManager.bdTheme('#f1f5f9', '#27272a')};
+        color: ${cssManager.bdTheme('#64748b', '#94a3b8')};
+      }
+
+      .task-status.running {
+        background: ${cssManager.bdTheme('#dbeafe', '#1e3a8a')};
+        color: ${cssManager.bdTheme('#1e40af', '#93c5fd')};
+      }
+
+      .task-status.completed {
+        background: ${cssManager.bdTheme('#dcfce7', '#14532d')};
+        color: ${cssManager.bdTheme('#15803d', '#86efac')};
+      }
+
+      .task-status.failed {
+        background: ${cssManager.bdTheme('#fee2e2', '#7f1d1d')};
+        color: ${cssManager.bdTheme('#dc2626', '#fca5a5')};
+      }
+
+      .task-info {
+        display: flex;
+        gap: 16px;
+        margin-bottom: 16px;
+        font-size: 13px;
+        color: ${cssManager.bdTheme('#64748b', '#94a3b8')};
+      }
+
+      .task-info-item {
+        display: flex;
+        align-items: center;
+        gap: 4px;
+      }
+
+      .task-info-icon {
+        width: 14px;
+        height: 14px;
+        opacity: 0.7;
+      }
+
+      .progress-container {
+        margin-bottom: 16px;
+      }
+
+      .progress-label {
+        display: flex;
+        justify-content: space-between;
+        margin-bottom: 8px;
+        font-size: 13px;
+        color: ${cssManager.bdTheme('#475569', '#cbd5e1')};
+      }
+
+      .progress-bar {
+        height: 8px;
+        background: ${cssManager.bdTheme('#e2e8f0', '#27272a')};
+        border-radius: 4px;
+        overflow: hidden;
+        position: relative;
+      }
+
+      .progress-fill {
+        height: 100%;
+        background: linear-gradient(90deg, #3b82f6, #6366f1);
+        border-radius: 4px;
+        transition: width 0.3s ease;
+        position: relative;
+        overflow: hidden;
+      }
+
+      .progress-fill::after {
+        content: '';
+        position: absolute;
+        top: 0;
+        left: 0;
+        right: 0;
+        bottom: 0;
+        background: linear-gradient(
+          90deg,
+          transparent,
+          rgba(255, 255, 255, 0.3),
+          transparent
+        );
+        animation: shimmer 2s infinite;
+      }
+
+      @keyframes shimmer {
+        0% {
+          transform: translateX(-100%);
+        }
+        100% {
+          transform: translateX(100%);
+        }
+      }
+
+      .steps-container {
+        border-top: 1px solid ${cssManager.bdTheme('#e2e8f0', '#27272a')};
+        padding-top: 12px;
+      }
+
+      .steps-title {
+        font-size: 12px;
+        font-weight: 600;
+        color: ${cssManager.bdTheme('#64748b', '#94a3b8')};
+        margin-bottom: 8px;
+        text-transform: uppercase;
+        letter-spacing: 0.5px;
+      }
+
+      .step-item {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        padding: 6px 0;
+        font-size: 13px;
+      }
+
+      .step-indicator {
+        width: 20px;
+        height: 20px;
+        border-radius: 50%;
+        display: flex;
+        align-items: center;
+        justify-content: center;
+        font-size: 10px;
+        font-weight: 600;
+        flex-shrink: 0;
+      }
+
+      .step-indicator.pending {
+        background: ${cssManager.bdTheme('#f1f5f9', '#27272a')};
+        color: ${cssManager.bdTheme('#94a3b8', '#64748b')};
+        border: 2px solid ${cssManager.bdTheme('#cbd5e1', '#3f3f46')};
+      }
+
+      .step-indicator.active {
+        background: linear-gradient(135deg, #3b82f6, #6366f1);
+        color: white;
+        animation: pulse 1.5s infinite;
+      }
+
+      .step-indicator.completed {
+        background: ${cssManager.bdTheme('#22c55e', '#22c55e')};
+        color: white;
+      }
+
+      .step-details {
+        flex: 1;
+      }
+
+      .step-name {
+        font-weight: 500;
+        color: ${cssManager.bdTheme('#1e293b', '#e2e8f0')};
+      }
+
+      .step-description {
+        font-size: 11px;
+        color: ${cssManager.bdTheme('#64748b', '#94a3b8')};
+        margin-top: 2px;
+      }
+
+      .step-percentage {
+        font-size: 11px;
+        font-weight: 600;
+        color: ${cssManager.bdTheme('#94a3b8', '#64748b')};
+      }
+
+      .empty-state {
+        text-align: center;
+        padding: 48px;
+        color: ${cssManager.bdTheme('#94a3b8', '#64748b')};
+      }
+
+      .empty-state-icon {
+        width: 64px;
+        height: 64px;
+        margin: 0 auto 16px;
+        opacity: 0.3;
+      }
+
+      .empty-state-text {
+        font-size: 16px;
+        margin-bottom: 8px;
+      }
+
+      .empty-state-subtext {
+        font-size: 14px;
+        color: ${cssManager.bdTheme('#cbd5e1', '#475569')};
+      }
+
+      .scheduled-section {
+        margin-top: 32px;
+      }
+
+      .schedule-info {
+        display: flex;
+        align-items: center;
+        gap: 8px;
+        margin-top: 8px;
+        font-size: 12px;
+        color: ${cssManager.bdTheme('#64748b', '#94a3b8')};
+      }
+
+      .schedule-icon {
+        width: 14px;
+        height: 14px;
+      }
+    `,
+  ];
+
+  // Lifecycle
+  async connectedCallback() {
+    await super.connectedCallback();
+    this.startRefreshing();
+  }
+
+  async disconnectedCallback() {
+    await super.disconnectedCallback();
+    this.stopRefreshing();
+  }
+
+  // Methods
+  private startRefreshing() {
+    if (this.refreshTimer) {
+      clearInterval(this.refreshTimer);
+    }
+
+    this.updateData();
+    this.refreshTimer = setInterval(() => {
+      this.updateData();
+    }, this.refreshInterval);
+    this.isRunning = true;
+  }
+
+  private stopRefreshing() {
+    if (this.refreshTimer) {
+      clearInterval(this.refreshTimer);
+      this.refreshTimer = null;
+    }
+    this.isRunning = false;
+  }
+
+  private updateData() {
+    if (!this.taskManager) {
+      this.tasks = [];
+      this.scheduledTasks = [];
+      return;
+    }
+
+    this.tasks = this.taskManager.getAllTasksMetadata();
+    this.scheduledTasks = this.taskManager.getScheduledTasks();
+  }
+
+  private formatNextRun(date: Date): string {
+    const now = new Date();
+    const diff = date.getTime() - now.getTime();
+    
+    if (diff < 0) return 'Past due';
+    if (diff < 60000) return 'Less than a minute';
+    if (diff < 3600000) return `${Math.floor(diff / 60000)} minutes`;
+    if (diff < 86400000) return `${Math.floor(diff / 3600000)} hours`;
+    return `${Math.floor(diff / 86400000)} days`;
+  }
+
+  private formatDuration(ms?: number): string {
+    if (!ms) return '-';
+    if (ms < 1000) return `${ms}ms`;
+    if (ms < 60000) return `${(ms / 1000).toFixed(1)}s`;
+    return `${(ms / 60000).toFixed(1)}m`;
+  }
+
+  // Render
+  render() {
+    return html`
+      <div class="dashboard-container">
+        <div class="dashboard-header">
+          <div class="dashboard-title">
+            <span>TaskBuffer Dashboard</span>
+            <span class="status-indicator ${this.isRunning ? '' : 'inactive'}"></span>
+          </div>
+          <div class="dashboard-subtitle">
+            ${this.tasks.length} task${this.tasks.length !== 1 ? 's' : ''} registered
+            ${this.scheduledTasks.length > 0 ? ` • ${this.scheduledTasks.length} scheduled` : ''}
+          </div>
+        </div>
+
+        <div class="tasks-section">
+          <h2 class="section-title">Active Tasks</h2>
+          
+          ${this.tasks.length > 0 ? html`
+            <div class="tasks-grid">
+              ${this.tasks.map(task => this.renderTaskCard(task))}
+            </div>
+          ` : html`
+            <div class="empty-state">
+              <svg class="empty-state-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" 
+                      d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2" />
+              </svg>
+              <div class="empty-state-text">No tasks registered</div>
+              <div class="empty-state-subtext">Tasks will appear here when added to the TaskManager</div>
+            </div>
+          `}
+        </div>
+
+        ${this.scheduledTasks.length > 0 ? html`
+          <div class="scheduled-section">
+            <h2 class="section-title">Scheduled Tasks</h2>
+            <div class="tasks-grid">
+              ${this.scheduledTasks.map(task => this.renderScheduledTaskCard(task))}
+            </div>
+          </div>
+        ` : ''}
+      </div>
+    `;
+  }
+
+  private renderTaskCard(task: ITaskMetadata) {
+    return html`
+      <div class="task-card">
+        <div class="task-header">
+          <div class="task-name">${task.name || 'Unnamed Task'}</div>
+          <div class="task-status ${task.status}">${task.status}</div>
+        </div>
+
+        <div class="task-info">
+          <div class="task-info-item">
+            <svg class="task-info-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" 
+                    d="M13 10V3L4 14h7v7l9-11h-7z" />
+            </svg>
+            <span>Run ${task.runCount || 0} times</span>
+          </div>
+          ${task.buffered ? html`
+            <div class="task-info-item">
+              <svg class="task-info-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" 
+                      d="M19 11H5m14 0a2 2 0 012 2v6a2 2 0 01-2 2H5a2 2 0 01-2-2v-6a2 2 0 012-2m14 0V9a2 2 0 00-2-2M5 11V9a2 2 0 012-2m0 0V5a2 2 0 012-2h6a2 2 0 012 2v2M7 7h10" />
+              </svg>
+              <span>Buffer: ${task.bufferMax || 0}</span>
+            </div>
+          ` : ''}
+        </div>
+
+        ${task.steps && task.steps.length > 0 ? html`
+          <div class="progress-container">
+            <div class="progress-label">
+              <span>Progress</span>
+              <span>${task.currentProgress || 0}%</span>
+            </div>
+            <div class="progress-bar">
+              <div class="progress-fill" style="width: ${task.currentProgress || 0}%"></div>
+            </div>
+          </div>
+
+          <div class="steps-container">
+            <div class="steps-title">Steps</div>
+            ${task.steps.map(step => html`
+              <div class="step-item">
+                <div class="step-indicator ${step.status}">
+                  ${step.status === 'completed' ? '✓' : 
+                    step.status === 'active' ? '•' : 
+                    ''}
+                </div>
+                <div class="step-details">
+                  <div class="step-name">${step.name}</div>
+                  ${step.description ? html`
+                    <div class="step-description">${step.description}</div>
+                  ` : ''}
+                </div>
+                <div class="step-percentage">${step.percentage}%</div>
+              </div>
+            `)}
+          </div>
+        ` : ''}
+      </div>
+    `;
+  }
+
+  private renderScheduledTaskCard(task: IScheduledTaskInfo) {
+    return html`
+      <div class="task-card">
+        <div class="task-header">
+          <div class="task-name">${task.name}</div>
+          <div class="task-status idle">scheduled</div>
+        </div>
+
+        <div class="schedule-info">
+          <svg class="schedule-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" 
+                  d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" />
+          </svg>
+          <span>Next run: ${this.formatNextRun(task.nextRun)}</span>
+        </div>
+
+        <div class="schedule-info">
+          <svg class="schedule-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" 
+                  d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" />
+          </svg>
+          <span>Schedule: ${task.schedule}</span>
+        </div>
+      </div>
+    `;
+  }
+}