v3.0.1

fix(smartmetrics): no code changes detected; no version bump or release required
v3.0.0
2026-02-19 13:55:53 +00:00 · 2026-02-19 13:55:53 +00:00 · 2026-02-19 10:10:58 +00:00 · 2026-02-19 10:10:58 +00:00 · 2026-02-19 09:51:34 +00:00 · 2026-02-19 09:46:46 +00:00
25 changed files with 12404 additions and 26178 deletions
--- a/.gitea/workflows/default_nottags.yaml
+++ b/.gitea/workflows/default_nottags.yaml
@@ -0,0 +1,66 @@
+name: Default (not tags)
+
+on:
+  push:
+    tags-ignore:
+      - '**'
+
+env:
+  IMAGE: registry.gitlab.com/hosttoday/ht-docker-node:npmci
+  NPMCI_COMPUTED_REPOURL: https://${{gitea.repository_owner}}:${{secrets.GITEA_TOKEN}}@gitea.lossless.digital/${{gitea.repository}}.git
+  NPMCI_TOKEN_NPM: ${{secrets.NPMCI_TOKEN_NPM}}
+  NPMCI_TOKEN_NPM2: ${{secrets.NPMCI_TOKEN_NPM2}}
+  NPMCI_GIT_GITHUBTOKEN: ${{secrets.NPMCI_GIT_GITHUBTOKEN}}
+  NPMCI_URL_CLOUDLY: ${{secrets.NPMCI_URL_CLOUDLY}}
+
+jobs:
+  security:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    container:
+      image: ${{ env.IMAGE }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install pnpm and npmci
+        run: |
+          pnpm install -g pnpm
+          pnpm install -g @shipzone/npmci
+
+      - name: Run npm prepare
+        run: npmci npm prepare
+
+      - name: Audit production dependencies
+        run: |
+          npmci command npm config set registry https://registry.npmjs.org
+          npmci command pnpm audit --audit-level=high --prod
+        continue-on-error: true
+
+      - name: Audit development dependencies
+        run: |
+          npmci command npm config set registry https://registry.npmjs.org
+          npmci command pnpm audit --audit-level=high --dev
+        continue-on-error: true
+
+  test:
+    if: ${{ always() }}
+    needs: security
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ env.IMAGE }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Test stable
+        run: |
+          npmci node install stable
+          npmci npm install
+          npmci npm test
+
+      - name: Test build
+        run: |
+          npmci node install stable
+          npmci npm install
+          npmci npm build
--- a/.gitea/workflows/default_tags.yaml
+++ b/.gitea/workflows/default_tags.yaml
@@ -0,0 +1,124 @@
+name: Default (tags)
+
+on:
+  push:
+    tags:
+      - '*'
+
+env:
+  IMAGE: registry.gitlab.com/hosttoday/ht-docker-node:npmci
+  NPMCI_COMPUTED_REPOURL: https://${{gitea.repository_owner}}:${{secrets.GITEA_TOKEN}}@gitea.lossless.digital/${{gitea.repository}}.git
+  NPMCI_TOKEN_NPM: ${{secrets.NPMCI_TOKEN_NPM}}
+  NPMCI_TOKEN_NPM2: ${{secrets.NPMCI_TOKEN_NPM2}}
+  NPMCI_GIT_GITHUBTOKEN: ${{secrets.NPMCI_GIT_GITHUBTOKEN}}
+  NPMCI_URL_CLOUDLY: ${{secrets.NPMCI_URL_CLOUDLY}}
+
+jobs:
+  security:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    container:
+      image: ${{ env.IMAGE }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Prepare
+        run: |
+          pnpm install -g pnpm
+          pnpm install -g @shipzone/npmci
+          npmci npm prepare
+
+      - name: Audit production dependencies
+        run: |
+          npmci command npm config set registry https://registry.npmjs.org
+          npmci command pnpm audit --audit-level=high --prod
+        continue-on-error: true
+
+      - name: Audit development dependencies
+        run: |
+          npmci command npm config set registry https://registry.npmjs.org
+          npmci command pnpm audit --audit-level=high --dev
+        continue-on-error: true
+
+  test:
+    if: ${{ always() }}
+    needs: security
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ env.IMAGE }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Prepare
+        run: |
+          pnpm install -g pnpm
+          pnpm install -g @shipzone/npmci
+          npmci npm prepare
+
+      - name: Test stable
+        run: |
+          npmci node install stable
+          npmci npm install
+          npmci npm test
+
+      - name: Test build
+        run: |
+          npmci node install stable
+          npmci npm install
+          npmci npm build
+
+  release:
+    needs: test
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ env.IMAGE }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Prepare
+        run: |
+          pnpm install -g pnpm
+          pnpm install -g @shipzone/npmci
+          npmci npm prepare
+
+      - name: Release
+        run: |
+          npmci node install stable
+          npmci npm publish
+
+  metadata:
+    needs: test
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    container:
+      image: ${{ env.IMAGE }}
+    continue-on-error: true
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Prepare
+        run: |
+          pnpm install -g pnpm
+          pnpm install -g @shipzone/npmci
+          npmci npm prepare
+
+      - name: Code quality
+        run: |
+          npmci command npm install -g typescript
+          npmci npm install
+
+      - name: Trigger
+        run: npmci trigger
+
+      - name: Build docs and upload artifacts
+        run: |
+          npmci node install stable
+          npmci npm install
+          pnpm install -g @git.zone/tsdoc
+          npmci command tsdoc
+        continue-on-error: true
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,137 +0,0 @@
-# gitzone ci_default
-image: registry.gitlab.com/hosttoday/ht-docker-node:npmci
-
-cache:
-  paths:
-    - .npmci_cache/
-  key: '$CI_BUILD_STAGE'
-
-stages:
-  - security
-  - test
-  - release
-  - metadata
-
-# ====================
-# security stage
-# ====================
-mirror:
-  stage: security
-  script:
-    - npmci git mirror
-  only:
-    - tags
-  tags:
-    - lossless
-    - docker
-    - notpriv
-
-auditProductionDependencies:
-  image: registry.gitlab.com/hosttoday/ht-docker-node:npmci
-  stage: security
-  script:
-    - npmci npm prepare
-    - npmci command npm install --production --ignore-scripts
-    - npmci command npm config set registry https://registry.npmjs.org
-    - npmci command npm audit --audit-level=high --only=prod --production
-  tags:
-    - docker
-
-auditDevDependencies:
-  image: registry.gitlab.com/hosttoday/ht-docker-node:npmci
-  stage: security
-  script:
-    - npmci npm prepare
-    - npmci command npm install --ignore-scripts
-    - npmci command npm config set registry https://registry.npmjs.org
-    - npmci command npm audit --audit-level=high --only=dev
-  tags:
-    - docker
-  allow_failure: true
-
-# ====================
-# test stage
-# ====================
-
-testStable:
-  stage: test
-  script:
-    - npmci npm prepare
-    - npmci node install stable
-    - npmci npm install
-    - npmci npm test
-  coverage: /\d+.?\d+?\%\s*coverage/
-  tags:
-    - docker
-
-testBuild:
-  stage: test
-  script:
-    - npmci npm prepare
-    - npmci node install stable
-    - npmci npm install
-    - npmci command npm run build
-  coverage: /\d+.?\d+?\%\s*coverage/
-  tags:
-    - docker
-
-release:
-  stage: release
-  script:
-    - npmci node install stable
-    - npmci npm publish
-  only:
-    - tags
-  tags:
-    - lossless
-    - docker
-    - notpriv
-
-# ====================
-# metadata stage
-# ====================
-codequality:
-  stage: metadata
-  allow_failure: true
-  only:
-    - tags
-  script:
-    - npmci command npm install -g tslint typescript
-    - npmci npm prepare
-    - npmci npm install
-    - npmci command "tslint -c tslint.json ./ts/**/*.ts"
-  tags:
-    - lossless
-    - docker
-    - priv
-
-trigger:
-  stage: metadata
-  script:
-    - npmci trigger
-  only:
-    - tags
-  tags:
-    - lossless
-    - docker
-    - notpriv
-
-pages:
-  stage: metadata
-  script:
-    - npmci node install lts
-    - npmci command npm install -g @gitzone/tsdoc
-    - npmci npm prepare
-    - npmci npm install
-    - npmci command tsdoc
-  tags:
-    - lossless
-    - docker
-    - notpriv
-  only:
-    - tags
-  artifacts:
-    expire_in: 1 week
-    paths:
-      - public
-  allow_failure: true
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -2,28 +2,10 @@
  "version": "0.2.0",
  "configurations": [
    {
-      "name": "current file",
-      "type": "node",
+      "command": "npm test",
+      "name": "Run npm test",
      "request": "launch",
-      "args": [
-        "${relativeFile}"
-      ],
-      "runtimeArgs": ["-r", "@gitzone/tsrun"],
-      "cwd": "${workspaceRoot}",
-      "protocol": "inspector",
-      "internalConsoleOptions": "openOnSessionStart"
-    },
-    {
-      "name": "test.ts",
-      "type": "node",
-      "request": "launch",
-      "args": [
-        "test/test.ts"
-      ],
-      "runtimeArgs": ["-r", "@gitzone/tsrun"],
-      "cwd": "${workspaceRoot}",
-      "protocol": "inspector",
-      "internalConsoleOptions": "openOnSessionStart"
+      "type": "node-terminal"
    }
  ]
 }
--- a/changelog.md
+++ b/changelog.md
@@ -0,0 +1,65 @@
+# Changelog
+
+## 2026-02-19 - 3.0.1 - fix(smartmetrics)
+no code changes detected; no version bump or release required
+
+- git diff contained no modifications
+- current package.json version is 3.0.0
+- no dependency or file changes to warrant a release
+
+## 2026-02-19 - 3.0.0 - BREAKING CHANGE(smartmetrics)
+add system-wide metrics collection, Prometheus gauges, and normalized CPU reporting
+
+- Add new sysusage plugin (ts/smartmetrics.sysusage.ts) that reads /proc/stat and /proc/meminfo (with os fallback) and returns system CPU, memory and load averages.
+- Expose system-wide Prometheus gauges: smartmetrics_system_cpu_percent, smartmetrics_system_memory_used_percent, smartmetrics_system_memory_used_bytes, smartmetrics_system_load_avg_1, smartmetrics_system_load_avg_5, smartmetrics_system_load_avg_15.
+- Extend IMetricsSnapshot with system fields: systemCpuPercent, systemMemTotalBytes, systemMemAvailableBytes, systemMemUsedBytes, systemMemUsedPercent, systemLoadAvg1, systemLoadAvg5, systemLoadAvg15 (this is a breaking TypeScript API change).
+- Normalize per-process CPU in pidusage by adding cpuCoreCount and cpuNormalizedPercent and use cpuNormalizedPercent when aggregating CPU across the process tree.
+- Export the new sysusage plugin from ts/smartmetrics.plugins.ts and wire system metrics into metric collection and Prometheus gauge updates.
+
+## 2026-02-19 - 2.0.11 - fix(deps)
+bump dependencies, update build script, expand README and npm metadata
+
+- Bumped runtime deps: @push.rocks/smartdelay ^3.0.5, @push.rocks/smartlog ^3.1.11
+- Updated devDependencies: @git.zone/tsbuild, tsbundle, tsrun, tstest and @types/node versions
+- Changed build script: "(tsbuild --web)" → "(tsbuild tsfolders)"
+- Updated npmextra.json: renamed keys (gitzone → @git.zone/cli, tsdoc → @git.zone/tsdoc), added release registries and accessLevel, and added @ship.zone/szci entry
+- Extensive README improvements: installation notes (pnpm), clearer API docs, examples, added Issue Reporting & Security section and utility docs (formatBytes)
+
+## 2025-06-09 - 2.0.9 - fix(readme)
+Update documentation with detailed usage instructions, API references and integration examples.
+
+- Overhauled README to provide a clearer explanation of SmartMetrics features and API.
+- Added a quick start guide, detailed examples, and code snippets for various integrations (Express, PM2, custom dashboards).
+- Reorganized documentation sections to better highlight core concepts including process aggregation and memory limit detection.
+- Updated installation instructions and usage examples to reflect the latest functionality.
+
+## 2025-06-09 - 2.0.8 - fix(smartmetrics)
+Refactor metrics calculation and update Prometheus integration documentation
+
+- Removed dependency on registry.getMetricsAsJSON by directly calculating Node.js metrics
+- Updated getMetrics to compute CPU time, heap size, and set default values for deprecated metrics
+- Enhanced documentation with comprehensive Prometheus integration examples
+- Improved logging on shutdown of the Prometheus endpoint
+
+## 2025-06-09 - 2.0.7 - Prometheus Metrics Integration
+feat: Implement Prometheus metrics exposure in SmartMetrics
+
+- Added Prometheus gauges for CPU and memory metrics.
+- Implemented HTTP server to expose metrics at the /metrics endpoint.
+- Created methods to enable and disable the Prometheus endpoint.
+- Updated getMetrics() to set gauge values.
+- Added tests for Prometheus metrics functionality.
+- Updated documentation plan for Prometheus integration.
+
+## 2023-07-02 to 2023-08-08 - 2.0.0 to 2.0.6 - Maintenance Updates
+Over this period several releases were published with iterative fixes and minor organizational changes.
+
+- Applied multiple core fixes and routine maintenance updates.
+- Switched to new organization scheme (recorded on 2023-07-10).
+- Performed several version bumps and configuration updates.
+
+## 2021-08-12 to 2022-07-27 - 1.0.1 to 1.0.17 - Maintenance and Breaking Changes
+During this interval a series of minor fixes were combined with a significant breaking change.
+
+- BREAKING CHANGE: Switched to ESM in 1.0.17 (2022-07-27).
+- Numerous maintenance updates and core fixes were applied.
--- a/npmextra.json
+++ b/npmextra.json
@@ -1,18 +1,43 @@
 {
-  "gitzone": {
+  "@git.zone/cli": {
    "projectType": "npm",
    "module": {
-      "githost": "gitlab.com",
-      "gitscope": "pushrocks",
+      "githost": "code.foss.global",
+      "gitscope": "push.rocks",
      "gitrepo": "smartmetrics",
-      "shortDescription": "easy system metrics",
-      "npmPackagename": "@pushrocks/smartmetrics",
+      "description": "A package for easy collection and reporting of system and process metrics.",
+      "npmPackagename": "@push.rocks/smartmetrics",
      "license": "MIT",
-      "projectDomain": "push.rocks"
+      "projectDomain": "push.rocks",
+      "keywords": [
+        "system metrics",
+        "performance monitoring",
+        "resource usage",
+        "memory management",
+        "CPU usage",
+        "prometheus",
+        "typescript",
+        "nodejs",
+        "process management",
+        "development tools",
+        "performance analysis",
+        "docker environments",
+        "log reporting",
+        "operational insights"
+      ]
+    },
+    "release": {
+      "registries": [
+        "https://verdaccio.lossless.digital",
+        "https://registry.npmjs.org"
+      ],
+      "accessLevel": "public"
    }
  },
-  "npmci": {
-    "npmGlobalTools": [],
-    "npmAccessLevel": "public"
+  "@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": []
  }
 }
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -1,24 +1,23 @@
 {
-  "name": "@pushrocks/smartmetrics",
-  "version": "1.0.11",
+  "name": "@push.rocks/smartmetrics",
+  "version": "3.0.1",
  "private": false,
-  "description": "easy system metrics",
+  "description": "A package for easy collection and reporting of system and process metrics.",
  "main": "dist_ts/index.js",
  "typings": "dist_ts/index.d.ts",
  "author": "Lossless GmbH",
  "license": "MIT",
  "scripts": {
-    "test": "(tstest test/ --web)",
-    "build": "(tsbuild --web)"
+    "test": "(tstest test/ --verbose)",
+    "build": "(tsbuild tsfolders)",
+    "buildDocs": "tsdoc"
  },
  "devDependencies": {
-    "@gitzone/tsbuild": "^2.1.25",
-    "@gitzone/tsbundle": "^1.0.78",
-    "@gitzone/tstest": "^1.0.44",
-    "@pushrocks/tapbundle": "^3.2.9",
-    "@types/node": "^16.6.1",
-    "tslint": "^6.1.3",
-    "tslint-config-prettier": "^1.15.0"
+    "@git.zone/tsbuild": "^4.1.2",
+    "@git.zone/tsbundle": "^2.8.3",
+    "@git.zone/tsrun": "^2.0.1",
+    "@git.zone/tstest": "^3.1.8",
+    "@types/node": "^25.3.0"
  },
  "browserslist": [
    "last 1 chrome versions"
@@ -36,11 +35,30 @@
    "readme.md"
  ],
  "dependencies": {
-    "@pushrocks/smartdelay": "^2.0.13",
-    "@pushrocks/smartlog": "^2.0.44",
-    "@types/pidusage": "^2.0.1",
-    "pidtree": "^0.5.0",
-    "pidusage": "^2.0.21",
-    "prom-client": "^13.2.0"
-  }
+    "@push.rocks/smartdelay": "^3.0.5",
+    "@push.rocks/smartlog": "^3.1.11"
+  },
+  "type": "module",
+  "keywords": [
+    "system metrics",
+    "performance monitoring",
+    "resource usage",
+    "memory management",
+    "CPU usage",
+    "prometheus",
+    "typescript",
+    "nodejs",
+    "process management",
+    "development tools",
+    "performance analysis",
+    "docker environments",
+    "log reporting",
+    "operational insights"
+  ],
+  "homepage": "https://code.foss.global/push.rocks/smartmetrics",
+  "repository": {
+    "type": "git",
+    "url": "https://code.foss.global/push.rocks/smartmetrics.git"
+  },
+  "packageManager": "pnpm@10.11.0+sha512.6540583f41cc5f628eb3d9773ecee802f4f9ef9923cc45b69890fb47991d4b092964694ec3a4f738a420c918a333062c8b925d312f42e4f0c263eb603551f977"
 }
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/readme.hints.md
+++ b/readme.hints.md
@@ -0,0 +1,30 @@
+# SmartMetrics Implementation Hints
+
+## Prometheus Integration
+
+The package now supports exposing metrics in Prometheus format through two mechanisms:
+
+1. **Direct Export**: `getPrometheusFormattedMetrics()` returns metrics in Prometheus text exposition format
+2. **HTTP Endpoint**: `enablePrometheusEndpoint(port)` starts an HTTP server that exposes metrics on `/metrics`
+
+### Architecture Decisions
+
+- We use the prom-client library's default collectors for standard Node.js metrics
+- Custom gauges are created for our calculated metrics (CPU percentage, memory percentage, memory bytes)
+- The `getMetrics()` method calculates values directly rather than parsing the Prometheus registry JSON
+- For metrics like `nodejs_active_handles_total` and `nodejs_active_requests_total`, we return 0 in `getMetrics()` since these require deprecated Node.js APIs, but the Prometheus collectors still track the real values
+
+### Consolidation Approach
+
+Initially, we were mixing two approaches:
+1. Extracting values from the Prometheus registry JSON for default metrics
+2. Creating custom gauges for calculated metrics
+
+We consolidated by:
+- Calculating all values directly in `getMetrics()` where possible
+- Only using the Prometheus registry for the text exposition format
+- This eliminates the dependency on parsing registry JSON and makes the code cleaner
+
+### Memory Calculation
+
+The package tracks memory usage across the main process and all child processes using `pidtree` and `pidusage`. This provides a more comprehensive view than just the main process memory.
--- a/readme.md
+++ b/readme.md
@@ -1,39 +1,285 @@
-# @pushrocks/smartmetrics
-easy system metrics
+# @push.rocks/smartmetrics

-## Availabililty and Links
-* [npmjs.org (npm package)](https://www.npmjs.com/package/@pushrocks/smartmetrics)
-* [gitlab.com (source)](https://gitlab.com/pushrocks/smartmetrics)
-* [github.com (source mirror)](https://github.com/pushrocks/smartmetrics)
-* [docs (typedoc)](https://pushrocks.gitlab.io/smartmetrics/)
+**Powerful system metrics collection for Node.js applications with Prometheus integration** 🚀

-## Status for master
+## Issue Reporting and Security

-Status Category | Status Badge
-- | --
-GitLab Pipelines | [![pipeline status](https://gitlab.com/pushrocks/smartmetrics/badges/master/pipeline.svg)](https://lossless.cloud)
-GitLab Pipline Test Coverage | [![coverage report](https://gitlab.com/pushrocks/smartmetrics/badges/master/coverage.svg)](https://lossless.cloud)
-npm | [![npm downloads per month](https://badgen.net/npm/dy/@pushrocks/smartmetrics)](https://lossless.cloud)
-Snyk | [![Known Vulnerabilities](https://badgen.net/snyk/pushrocks/smartmetrics)](https://lossless.cloud)
-TypeScript Support | [![TypeScript](https://badgen.net/badge/TypeScript/>=%203.x/blue?icon=typescript)](https://lossless.cloud)
-node Support | [![node](https://img.shields.io/badge/node->=%2010.x.x-blue.svg)](https://nodejs.org/dist/latest-v10.x/docs/api/)
-Code Style | [![Code Style](https://badgen.net/badge/style/prettier/purple)](https://lossless.cloud)
-PackagePhobia (total standalone install weight) | [![PackagePhobia](https://badgen.net/packagephobia/install/@pushrocks/smartmetrics)](https://lossless.cloud)
-PackagePhobia (package size on registry) | [![PackagePhobia](https://badgen.net/packagephobia/publish/@pushrocks/smartmetrics)](https://lossless.cloud)
-BundlePhobia (total size when bundled) | [![BundlePhobia](https://badgen.net/bundlephobia/minzip/@pushrocks/smartmetrics)](https://lossless.cloud)
-Platform support | [![Supports Windows 10](https://badgen.net/badge/supports%20Windows%2010/yes/green?icon=windows)](https://lossless.cloud) [![Supports Mac OS X](https://badgen.net/badge/supports%20Mac%20OS%20X/yes/green?icon=apple)](https://lossless.cloud)
+For reporting bugs, issues, or security vulnerabilities, please visit [community.foss.global/](https://community.foss.global/). This is the central community hub for all issue reporting. Developers who sign and comply with our contribution agreement and go through identification can also get a [code.foss.global/](https://code.foss.global/) account to submit Pull Requests directly.

-## Usage
+## What is SmartMetrics?

-Use TypeScript for best in class intellisense
+SmartMetrics is a comprehensive metrics collection library that monitors your Node.js application's resource usage in real-time. It tracks CPU usage, memory consumption, and system metrics across your main process and all child processes, providing insights through both JSON and Prometheus formats.

-## Contribution
+## Key Features

-We are always happy for code contributions. If you are not the code contributing type that is ok. Still, maintaining Open Source repositories takes considerable time and thought. If you like the quality of what we do and our modules are useful to you we would appreciate a little monthly contribution: You can [contribute one time](https://lossless.link/contribute-onetime) or [contribute monthly](https://lossless.link/contribute). :)
+- 📊 **Real-time Metrics Collection** – Monitor CPU and memory usage across all processes
+- 🔄 **Automatic Child Process Tracking** – Aggregates metrics from main and child processes via `pidtree` + `pidusage`
+- 🐳 **Docker-Aware** – Detects container memory limits from cgroup automatically
+- 📈 **Prometheus Integration** – Built-in HTTP endpoint for Prometheus scraping with `prom-client`
+- 🔧 **Flexible Output Formats** – Get metrics as JSON objects or Prometheus text exposition format
+- 📝 **Automatic Heartbeat Logging** – Optional periodic metrics logging via `@push.rocks/smartlog`
+- 🚀 **Zero Configuration** – Works out of the box with sensible defaults

-For further information read the linked docs at the top of this readme.
+## Installation

-> MIT licensed | **&copy;** [Lossless GmbH](https://lossless.gmbh)
-| By using this npm module you agree to our [privacy policy](https://lossless.gmbH/privacy)
+```bash
+pnpm install @push.rocks/smartmetrics
+# or
+npm install @push.rocks/smartmetrics
+```

-[![repo-footer](https://lossless.gitlab.io/publicrelations/repofooter.svg)](https://maintainedby.lossless.com)
+## Quick Start
+
+```typescript
+import { SmartMetrics } from '@push.rocks/smartmetrics';
+import { Smartlog } from '@push.rocks/smartlog';
+
+// Create a logger instance
+const logger = new Smartlog({
+  logContext: null,
+  minimumLogLevel: 'info',
+});
+logger.enableConsole();
+
+// Initialize SmartMetrics
+const metrics = new SmartMetrics(logger, 'my-service');
+
+// Get metrics on-demand
+const currentMetrics = await metrics.getMetrics();
+console.log(`CPU Usage: ${currentMetrics.cpuUsageText}`);
+console.log(`Memory: ${currentMetrics.memoryUsageText}`);
+
+// Enable automatic heartbeat logging (every 20 seconds)
+metrics.start();
+
+// Enable Prometheus endpoint
+metrics.enablePrometheusEndpoint(9090);
+// Metrics now available at http://localhost:9090/metrics
+
+// Clean shutdown
+metrics.stop();
+```
+
+## Core Concepts
+
+### Process Aggregation
+
+SmartMetrics doesn't just monitor your main process – it automatically discovers and aggregates metrics from all child processes spawned by your application using `pidtree`. This gives you a complete picture of your application's resource footprint, not just the parent process.
+
+### Memory Limit Detection
+
+The library automatically detects available memory whether running on bare metal, in Docker containers, or with Node.js heap restrictions. It picks the most restrictive of:
+
+1. **System total memory** (`os.totalmem()`)
+2. **Docker cgroup limit** – supports both cgroup v2 (`/sys/fs/cgroup/memory.max`) and cgroup v1 (`/sys/fs/cgroup/memory/memory.limit_in_bytes`)
+3. **V8 heap size limit** (`v8.getHeapStatistics().heap_size_limit`)
+
+This ensures accurate percentage calculations regardless of environment.
+
+### Dual Output Formats
+
+- **JSON Format** (`getMetrics()`) – Ideal for application monitoring, custom dashboards, and programmatic access
+- **Prometheus Format** (`getPrometheusFormattedMetrics()`) – Perfect for integration with Prometheus/Grafana monitoring stacks
+
+## API Reference
+
+### `new SmartMetrics(logger, sourceName)`
+
+Creates a new SmartMetrics instance.
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `logger` | `Smartlog` | A `@push.rocks/smartlog` logger instance |
+| `sourceName` | `string` | Identifier for your service/application |
+
+### `async getMetrics(): Promise<IMetricsSnapshot>`
+
+Retrieves current system metrics as a structured object.
+
+**Returns `IMetricsSnapshot`:**
+
+```typescript
+{
+  process_cpu_seconds_total: number;    // Total CPU time in seconds
+  nodejs_active_handles_total: number;   // Always 0 (deprecated Node.js API; real values tracked by Prometheus default collectors)
+  nodejs_active_requests_total: number;  // Always 0 (deprecated Node.js API; real values tracked by Prometheus default collectors)
+  nodejs_heap_size_total_bytes: number;  // V8 heap size in bytes
+  cpuPercentage: number;                 // Aggregated CPU usage across all child processes
+  cpuUsageText: string;                  // Human-readable CPU usage (e.g. "12.5 %")
+  memoryPercentage: number;              // Memory usage as percentage of detected limit
+  memoryUsageBytes: number;              // Total memory in bytes across all child processes
+  memoryUsageText: string;               // Human-readable (e.g. "45% | 920 MB / 2 GB")
+}
+```
+
+**Example:**
+
+```typescript
+const metrics = await smartMetrics.getMetrics();
+if (metrics.cpuPercentage > 80) {
+  console.warn('High CPU usage detected!');
+}
+```
+
+### `start(): void`
+
+Starts automatic metrics collection and heartbeat logging every 20 seconds via the provided `Smartlog` instance.
+
+```typescript
+smartMetrics.start();
+// Logs: "sending heartbeat for my-service with metrics" every 20 seconds
+```
+
+### `stop(): void`
+
+Stops automatic metrics collection, closes heartbeat loop, and shuts down any open Prometheus endpoints.
+
+### `async getPrometheusFormattedMetrics(): Promise<string>`
+
+Returns all metrics in Prometheus text exposition format, including default Node.js collectors and custom SmartMetrics gauges.
+
+```typescript
+const promMetrics = await smartMetrics.getPrometheusFormattedMetrics();
+// Returns:
+// # HELP smartmetrics_cpu_percentage Current CPU usage percentage
+// # TYPE smartmetrics_cpu_percentage gauge
+// smartmetrics_cpu_percentage 15.2
+// # HELP smartmetrics_memory_percentage Current memory usage percentage
+// # TYPE smartmetrics_memory_percentage gauge
+// smartmetrics_memory_percentage 45.3
+// # HELP smartmetrics_memory_usage_bytes Current memory usage in bytes
+// # TYPE smartmetrics_memory_usage_bytes gauge
+// smartmetrics_memory_usage_bytes 965214208
+// ... plus all default Node.js metrics from prom-client
+```
+
+### `enablePrometheusEndpoint(port?: number): void`
+
+Starts an HTTP server that exposes metrics at `/metrics` for Prometheus scraping.
+
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `port` | `number` | `9090` | Port to listen on |
+
+```typescript
+smartMetrics.enablePrometheusEndpoint(3000);
+// GET http://localhost:3000/metrics → Prometheus text format
+// GET http://localhost:3000/anything-else → 404
+```
+
+### `disablePrometheusEndpoint(): void`
+
+Gracefully shuts down the Prometheus HTTP server.
+
+### `formatBytes(bytes, decimals?): string`
+
+Utility method to convert byte values to human-readable strings.
+
+```typescript
+smartMetrics.formatBytes(1073741824); // "1 GB"
+smartMetrics.formatBytes(1536, 1);    // "1.5 KB"
+```
+
+## Use Cases
+
+### 🔍 Application Performance Monitoring
+
+```typescript
+const metricsBefore = await smartMetrics.getMetrics();
+await performHeavyOperation();
+const metricsAfter = await smartMetrics.getMetrics();
+
+console.log(`Operation consumed ${
+  metricsAfter.process_cpu_seconds_total - metricsBefore.process_cpu_seconds_total
+} CPU seconds`);
+```
+
+### 🛡️ Resource Limit Enforcement
+
+```typescript
+async function checkResources() {
+  const metrics = await smartMetrics.getMetrics();
+
+  if (metrics.memoryPercentage > 90) {
+    throw new Error('Memory usage too high, refusing new operations');
+  }
+
+  if (metrics.cpuPercentage > 95) {
+    await delay(1000); // Back off when CPU is stressed
+  }
+}
+```
+
+### 📈 Prometheus + Grafana Stack
+
+```typescript
+smartMetrics.enablePrometheusEndpoint(9090);
+
+// prometheus.yml:
+// scrape_configs:
+//   - job_name: 'my-app'
+//     scrape_interval: 15s
+//     static_configs:
+//       - targets: ['localhost:9090']
+```
+
+### 🐳 Container Resource Monitoring
+
+```typescript
+// Automatically detects Docker/cgroup memory limits
+const metrics = await smartMetrics.getMetrics();
+console.log(metrics.memoryUsageText);
+// Output: "45% | 920 MB / 2 GB" (container limit detected)
+```
+
+### 🔄 Health Check Endpoint
+
+```typescript
+import express from 'express';
+
+const app = express();
+
+app.get('/health', async (req, res) => {
+  const metrics = await smartMetrics.getMetrics();
+
+  res.json({
+    status: metrics.memoryPercentage < 90 ? 'healthy' : 'degraded',
+    cpu: metrics.cpuUsageText,
+    memory: metrics.memoryUsageText,
+  });
+});
+```
+
+### 🔁 Graceful Restart on High Memory (PM2)
+
+```typescript
+setInterval(async () => {
+  const metrics = await smartMetrics.getMetrics();
+
+  if (metrics.memoryPercentage > 95) {
+    console.error('Memory limit reached, requesting restart');
+    process.exit(0); // PM2 will restart the process
+  }
+}, 10000);
+```
+
+## License and Legal Information
+
+This repository contains open-source code licensed under the MIT License. A copy of the license can be found in the [LICENSE](./LICENSE) file.
+
+**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.
+
+### Trademarks
+
+This 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 or third parties, 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 or the guidelines of the respective third-party owners, and any usage must be approved in writing. Third-party trademarks used herein are the property of their respective owners and used only in a descriptive manner, e.g. for an implementation of an API or similar.
+
+### Company Information
+
+Task Venture Capital GmbH
+Registered at District Court Bremen HRB 35230 HB, Germany
+
+For any legal inquiries or further information, please contact us via email at hello@task.vc.
+
+By 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.
--- a/readme.plan.md
+++ b/readme.plan.md
@@ -0,0 +1,81 @@
+# Prometheus Metrics Implementation Plan
+
+`cat /home/philkunz/.claude/CLAUDE.md`
+
+## Overview
+Add Prometheus metrics exposure functionality to SmartMetrics while maintaining backward compatibility with existing `getMetrics()` method.
+
+## Implementation Tasks
+
+### 1. Add HTTP Server Dependencies
+- [x] Check if we need to add any HTTP server dependency to package.json
+- [x] Import necessary modules in smartmetrics.plugins.ts
+
+### 2. Create Prometheus Gauges in SmartMetrics Class
+- [x] Add private properties for custom gauges:
+  - [x] `private cpuPercentageGauge: plugins.promClient.Gauge<string>`
+  - [x] `private memoryPercentageGauge: plugins.promClient.Gauge<string>`
+  - [x] `private memoryUsageBytesGauge: plugins.promClient.Gauge<string>`
+- [x] Initialize gauges in `setup()` method with appropriate names and help text:
+  - [x] `smartmetrics_cpu_percentage` - "Current CPU usage percentage"
+  - [x] `smartmetrics_memory_percentage` - "Current memory usage percentage"
+  - [x] `smartmetrics_memory_usage_bytes` - "Current memory usage in bytes"
+
+### 3. Update getMetrics() Method
+- [x] After calculating metrics, update the Prometheus gauges:
+  - [x] `this.cpuPercentageGauge.set(cpuPercentage)`
+  - [x] `this.memoryPercentageGauge.set(memoryPercentage)`
+  - [x] `this.memoryUsageBytesGauge.set(memoryUsageBytes)`
+- [x] Ensure gauges are only updated if they exist (defensive programming)
+
+### 4. Add getPrometheusFormattedMetrics() Method
+- [x] Create new public async method `getPrometheusFormattedMetrics(): Promise<string>`
+- [x] Call `this.getMetrics()` to ensure gauges are updated with latest values
+- [x] Return `await this.registry.metrics()` to get Prometheus text format
+
+### 5. Add HTTP Server Properties
+- [x] Add private property for HTTP server: `private prometheusServer?: any`
+- [x] Add private property for server port: `private prometheusPort?: number`
+
+### 6. Implement enablePrometheusEndpoint() Method
+- [x] Create new public method `enablePrometheusEndpoint(port: number = 9090): void`
+- [x] Check if server is already running, if so, log warning and return
+- [x] Create minimal HTTP server using Node.js built-in `http` module:
+  - [x] Listen on specified port
+  - [x] Handle GET requests to `/metrics` endpoint
+  - [x] Return Prometheus-formatted metrics with correct Content-Type header
+  - [x] Handle other routes with 404
+- [x] Store server reference and port for later cleanup
+- [x] Log info message about endpoint availability
+
+### 7. Add disablePrometheusEndpoint() Method
+- [x] Create new public method `disablePrometheusEndpoint(): void`
+- [x] Check if server exists, if not, return
+- [x] Close the HTTP server
+- [x] Clear server reference and port
+- [x] Log info message about endpoint shutdown
+
+### 8. Update stop() Method
+- [x] Call `disablePrometheusEndpoint()` to ensure clean shutdown
+
+### 9. Add Tests
+- [x] Add test for `getPrometheusFormattedMetrics()`:
+  - [x] Verify it returns a string
+  - [x] Verify it contains expected metric names
+  - [x] Verify format matches Prometheus text exposition format
+- [x] Add test for `enablePrometheusEndpoint()`:
+  - [x] Start endpoint on test port (e.g., 19090)
+  - [x] Make HTTP request to `/metrics`
+  - [x] Verify response has correct Content-Type
+  - [x] Verify response contains metrics
+  - [x] Clean up by calling `disablePrometheusEndpoint()`
+
+### 10. Update Documentation
+- [x] Add usage example in readme.md for Prometheus integration
+- [x] Document the new methods in code comments
+
+## Notes
+- Using Node.js built-in `http` module to avoid adding unnecessary dependencies
+- Default port 9090 is commonly used for metrics endpoints
+- Maintaining backward compatibility - existing functionality unchanged
+- Prometheus text format example: `metric_name{label="value"} 123.45`
--- a/test/plugins.ts
+++ b/test/plugins.ts
@@ -1,5 +1,3 @@
-import * as smartlog from '@pushrocks/smartlog';
+import * as smartlog from '@push.rocks/smartlog';

-export {
-  smartlog
-}
+export { smartlog };
--- a/test/test.ts
+++ b/test/test.ts
@@ -1,18 +1,18 @@
-import * as plugins from './plugins';
+import * as plugins from './plugins.js';

-import { expect, tap } from '@pushrocks/tapbundle';
-import * as smartmetrics from '../ts/index';
+import { expect, tap } from '@git.zone/tstest/tapbundle';
+import * as smartmetrics from '../ts/index.js';

 let testSmartMetrics: smartmetrics.SmartMetrics;

 tap.test('should create a smartmetrics instance', async () => {
  const logger = new plugins.smartlog.Smartlog({
    logContext: null,
-    minimumLogLevel: 'silly'
+    minimumLogLevel: 'silly',
  });
  logger.enableConsole();
  testSmartMetrics = new smartmetrics.SmartMetrics(logger, 'testContainer');
-  expect(testSmartMetrics).to.be.instanceOf(smartmetrics.SmartMetrics);
+  expect(testSmartMetrics).toBeInstanceOf(smartmetrics.SmartMetrics);
 });

 tap.test('should start smartmetrics', async () => {
@@ -20,8 +20,59 @@ tap.test('should start smartmetrics', async () => {
 });

 tap.test('should produce valid metrics', async (tools) => {
-  console.log('calling .getMetrics from Testfile:')
+  console.log('calling .getMetrics from Testfile:');
  console.log(await testSmartMetrics.getMetrics());
-})
+});

-tap.start();
+tap.test('should return Prometheus formatted metrics', async () => {
+  const prometheusMetrics = await testSmartMetrics.getPrometheusFormattedMetrics();
+  expect(prometheusMetrics).toBeTypeofString();
+  expect(prometheusMetrics).toContain('smartmetrics_cpu_percentage');
+  expect(prometheusMetrics).toContain('smartmetrics_memory_percentage');
+  expect(prometheusMetrics).toContain('smartmetrics_memory_usage_bytes');
+  expect(prometheusMetrics).toContain('# HELP');
+  expect(prometheusMetrics).toContain('# TYPE');
+});
+
+tap.test('should enable Prometheus endpoint', async (tools) => {
+  const testPort = 19090;
+  testSmartMetrics.enablePrometheusEndpoint(testPort);
+  
+  // Give the server time to start
+  await tools.delayFor(1000);
+  
+  // Test the endpoint
+  const response = await fetch(`http://localhost:${testPort}/metrics`);
+  expect(response.status).toEqual(200);
+  expect(response.headers.get('content-type')).toEqual('text/plain; version=0.0.4');
+  
+  const metricsText = await response.text();
+  expect(metricsText).toContain('smartmetrics_cpu_percentage');
+  expect(metricsText).toContain('smartmetrics_memory_percentage');
+  expect(metricsText).toContain('smartmetrics_memory_usage_bytes');
+});
+
+tap.test('should handle 404 for non-metrics endpoints', async () => {
+  const response = await fetch('http://localhost:19090/notfound');
+  expect(response.status).toEqual(404);
+  const text = await response.text();
+  expect(text).toEqual('Not Found');
+});
+
+tap.test('should disable Prometheus endpoint', async () => {
+  testSmartMetrics.disablePrometheusEndpoint();
+  
+  // Give the server time to shut down
+  await new Promise(resolve => setTimeout(resolve, 1000));
+  
+  // Verify the endpoint is no longer accessible
+  try {
+    await fetch('http://localhost:19090/metrics');
+    throw new Error('Should have failed to connect');
+  } catch (error) {
+    // Expected to fail
+    expect(error.message).toContain('fetch failed');
+  }
+});
+
+export default tap.start();
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -0,0 +1,8 @@
+/**
+ * autocreated commitinfo by @push.rocks/commitinfo
+ */
+export const commitinfo = {
+  name: '@push.rocks/smartmetrics',
+  version: '3.0.1',
+  description: 'A package for easy collection and reporting of system and process metrics.'
+}
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -1,2 +1,2 @@
-export * from './smartmetrics.interfaces';
-export * from './smartmetrics.classes.smartmetrics';
+export * from './smartmetrics.interfaces.js';
+export * from './smartmetrics.classes.smartmetrics.js';
--- a/ts/smartmetrics.classes.smartmetrics.ts
+++ b/ts/smartmetrics.classes.smartmetrics.ts
@@ -1,23 +1,122 @@
-import * as plugins from './smartmetrics.plugins';
-import * as interfaces from './smartmetrics.interfaces';
-import { Cipher } from 'crypto';
+import * as plugins from './smartmetrics.plugins.js';
+import * as interfaces from './smartmetrics.interfaces.js';

 export class SmartMetrics {
  public started = false;
  public sourceNameArg: string;
  public logger: plugins.smartlog.Smartlog;
-  public registry: plugins.promClient.Registry;
+  public registry: plugins.prom.Registry;
+  public maxMemoryMB: number;

-  public async setup() {
-    const collectDefaultMetrics = plugins.promClient.collectDefaultMetrics;
-    this.registry = new plugins.promClient.Registry();
-    collectDefaultMetrics({ register: this.registry });
+  // Prometheus gauges for custom metrics
+  private cpuPercentageGauge: plugins.prom.Gauge;
+  private memoryPercentageGauge: plugins.prom.Gauge;
+  private memoryUsageBytesGauge: plugins.prom.Gauge;
+  private systemCpuPercentGauge: plugins.prom.Gauge;
+  private systemMemUsedPercentGauge: plugins.prom.Gauge;
+  private systemMemUsedBytesGauge: plugins.prom.Gauge;
+  private systemLoadAvg1Gauge: plugins.prom.Gauge;
+  private systemLoadAvg5Gauge: plugins.prom.Gauge;
+  private systemLoadAvg15Gauge: plugins.prom.Gauge;
+
+  // HTTP server for Prometheus endpoint
+  private prometheusServer?: plugins.http.Server;
+  private prometheusPort?: number;
+
+  public setup() {
+    this.registry = new plugins.prom.Registry();
+    plugins.prom.collectDefaultMetrics(this.registry);
+
+    // Initialize custom gauges
+    this.cpuPercentageGauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_cpu_percentage',
+      help: 'Current CPU usage percentage',
+      registers: [this.registry]
+    });
+
+    this.memoryPercentageGauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_memory_percentage',
+      help: 'Current memory usage percentage',
+      registers: [this.registry]
+    });
+
+    this.memoryUsageBytesGauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_memory_usage_bytes',
+      help: 'Current memory usage in bytes',
+      registers: [this.registry]
+    });
+
+    this.systemCpuPercentGauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_system_cpu_percent',
+      help: 'System-wide CPU usage percentage',
+      registers: [this.registry]
+    });
+
+    this.systemMemUsedPercentGauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_system_memory_used_percent',
+      help: 'System-wide memory usage percentage',
+      registers: [this.registry]
+    });
+
+    this.systemMemUsedBytesGauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_system_memory_used_bytes',
+      help: 'System-wide memory used in bytes',
+      registers: [this.registry]
+    });
+
+    this.systemLoadAvg1Gauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_system_load_avg_1',
+      help: 'System 1-minute load average',
+      registers: [this.registry]
+    });
+
+    this.systemLoadAvg5Gauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_system_load_avg_5',
+      help: 'System 5-minute load average',
+      registers: [this.registry]
+    });
+
+    this.systemLoadAvg15Gauge = new plugins.prom.Gauge({
+      name: 'smartmetrics_system_load_avg_15',
+      help: 'System 15-minute load average',
+      registers: [this.registry]
+    });
  }

  constructor(loggerArg: plugins.smartlog.Smartlog, sourceNameArg: string) {
    this.logger = loggerArg;
    this.sourceNameArg = sourceNameArg;
    this.setup();
+    this.checkMemoryLimits();
+  }
+
+  private checkMemoryLimits() {
+    const heapStats = plugins.v8.getHeapStatistics();
+    const maxHeapSizeMB = heapStats.heap_size_limit / 1024 / 1024;
+    const totalSystemMemoryMB = plugins.os.totalmem() / 1024 / 1024;
+
+    let dockerMemoryLimitMB = totalSystemMemoryMB;
+
+    // Try cgroup v2 first, then fall back to cgroup v1
+    try {
+      const cgroupV2 = plugins.fs.readFileSync('/sys/fs/cgroup/memory.max', 'utf8').trim();
+      if (cgroupV2 !== 'max') {
+        dockerMemoryLimitMB = parseInt(cgroupV2, 10) / 1024 / 1024;
+      }
+    } catch {
+      try {
+        const cgroupV1 = plugins.fs.readFileSync(
+          '/sys/fs/cgroup/memory/memory.limit_in_bytes',
+          'utf8'
+        ).trim();
+        dockerMemoryLimitMB = parseInt(cgroupV1, 10) / 1024 / 1024;
+      } catch {
+        // Not running in a container — use system memory
+      }
+    }
+
+    // Pick the most restrictive limit
+    this.maxMemoryMB = Math.min(totalSystemMemoryMB, dockerMemoryLimitMB, maxHeapSizeMB);
  }

  public start() {
@@ -31,7 +130,7 @@ export class SmartMetrics {
          eventType: 'heartbeat',
          metrics: await this.getMetrics(),
        });
-        await plugins.smartdelay.delayFor(10000, null, true);
+        await plugins.smartdelay.delayFor(20000, null, true);
      }
    };
    unattendedStart();
@@ -50,57 +149,151 @@ export class SmartMetrics {
  }

  public async getMetrics() {
-    const originalMetrics = await this.registry.getMetricsAsJSON();
-    const pids = await plugins.pidtree(process.pid);
-    const stats = await plugins.pidusage([process.pid, ...pids]);
+    let pids: number[] = [];
+    try {
+      pids = await plugins.pidtree.getChildPids(process.pid);
+    } catch {
+      // pidtree can fail if process tree cannot be read
+    }
+    const stats = await plugins.pidusage.getPidUsage([process.pid, ...pids]);

-    // lets compute cpu usage
+    // Aggregate normalized CPU (0-100% of total machine) across process tree
    let cpuPercentage = 0;
-    for (const stat of Object.keys(stats)) {
-      if (!stats[stat]) continue;
-      cpuPercentage += stats[stat].cpu / 100;
+    for (const stat of Object.values(stats)) {
+      if (!stat) continue;
+      cpuPercentage += stat.cpuNormalizedPercent;
    }
-    let cpuUsageText = `${Math.round(cpuPercentage * 10000) / 100} %`;
+    let cpuUsageText = `${Math.round(cpuPercentage * 100) / 100} %`;

-    // lets compute memory usage
    let memoryUsageBytes = 0;
-    for (const stat of Object.keys(stats)) {
-      if (!stats[stat]) continue;
-      memoryUsageBytes += stats[stat].memory;
+    for (const stat of Object.values(stats)) {
+      if (!stat) continue;
+      memoryUsageBytes += stat.memory;
    }
-    let memoryUsageText = `${this.formatBytes(memoryUsageBytes)} / ${this.formatBytes(1000000000)}`;
-    let memoryPercentage = Math.round((memoryUsageBytes / 1000000000) * 100) / 100;

-    console.log(`${cpuUsageText} ||| ${memoryUsageText} `);
+    let memoryPercentage =
+      Math.round((memoryUsageBytes / (this.maxMemoryMB * 1024 * 1024)) * 100 * 100) / 100;
+    let memoryUsageText = `${memoryPercentage}% | ${this.formatBytes(
+      memoryUsageBytes
+    )} / ${this.formatBytes(this.maxMemoryMB * 1024 * 1024)}`;
+
+    // Get system-wide metrics
+    const systemUsage = await plugins.sysusage.getSystemUsage();
+
+    // Update Prometheus gauges with current values
+    if (this.cpuPercentageGauge) {
+      this.cpuPercentageGauge.set(cpuPercentage);
+    }
+    if (this.memoryPercentageGauge) {
+      this.memoryPercentageGauge.set(memoryPercentage);
+    }
+    if (this.memoryUsageBytesGauge) {
+      this.memoryUsageBytesGauge.set(memoryUsageBytes);
+    }
+    if (this.systemCpuPercentGauge) {
+      this.systemCpuPercentGauge.set(systemUsage.cpuPercent);
+    }
+    if (this.systemMemUsedPercentGauge) {
+      this.systemMemUsedPercentGauge.set(systemUsage.memUsedPercent);
+    }
+    if (this.systemMemUsedBytesGauge) {
+      this.systemMemUsedBytesGauge.set(systemUsage.memUsedBytes);
+    }
+    if (this.systemLoadAvg1Gauge) {
+      this.systemLoadAvg1Gauge.set(systemUsage.loadAvg1);
+    }
+    if (this.systemLoadAvg5Gauge) {
+      this.systemLoadAvg5Gauge.set(systemUsage.loadAvg5);
+    }
+    if (this.systemLoadAvg15Gauge) {
+      this.systemLoadAvg15Gauge.set(systemUsage.loadAvg15);
+    }
+
+    // Calculate Node.js metrics directly
+    const cpuUsage = process.cpuUsage();
+    const process_cpu_seconds_total = (cpuUsage.user + cpuUsage.system) / 1000000;
+
+    const heapStats = plugins.v8.getHeapStatistics();
+    const nodejs_heap_size_total_bytes = heapStats.total_heap_size;
+
+    const nodejs_active_handles_total = 0;
+    const nodejs_active_requests_total = 0;

    const returnMetrics: interfaces.IMetricsSnapshot = {
-      originalMetrics,
-      process_cpu_seconds_total: (
-        originalMetrics.find((metricSet) => metricSet.name === 'process_cpu_seconds_total') as any
-      ).values[0].value,
-      nodejs_active_handles_total: (
-        originalMetrics.find((metricSet) => metricSet.name === 'nodejs_active_handles_total') as any
-      ).values[0].value,
-      nodejs_active_requests_total: (
-        originalMetrics.find(
-          (metricSet) => metricSet.name === 'nodejs_active_requests_total'
-        ) as any
-      ).values[0].value,
-      nodejs_heap_size_total_bytes: (
-        originalMetrics.find(
-          (metricSet) => metricSet.name === 'nodejs_heap_size_total_bytes'
-        ) as any
-      ).values[0].value,
+      process_cpu_seconds_total,
+      nodejs_active_handles_total,
+      nodejs_active_requests_total,
+      nodejs_heap_size_total_bytes,
      cpuPercentage,
      cpuUsageText,
      memoryPercentage,
      memoryUsageBytes,
      memoryUsageText,
+      systemCpuPercent: systemUsage.cpuPercent,
+      systemMemTotalBytes: systemUsage.memTotalBytes,
+      systemMemAvailableBytes: systemUsage.memAvailableBytes,
+      systemMemUsedBytes: systemUsage.memUsedBytes,
+      systemMemUsedPercent: systemUsage.memUsedPercent,
+      systemLoadAvg1: systemUsage.loadAvg1,
+      systemLoadAvg5: systemUsage.loadAvg5,
+      systemLoadAvg15: systemUsage.loadAvg15,
    };
    return returnMetrics;
  }

+  public async getPrometheusFormattedMetrics(): Promise<string> {
+    // Update metrics to ensure gauges have latest values
+    await this.getMetrics();
+
+    // Return Prometheus text exposition format
+    return await this.registry.metrics();
+  }
+
+  public enablePrometheusEndpoint(port: number = 9090): void {
+    if (this.prometheusServer) {
+      this.logger.log('warn', 'Prometheus endpoint is already running');
+      return;
+    }
+
+    this.prometheusServer = plugins.http.createServer(async (req, res) => {
+      if (req.url === '/metrics' && req.method === 'GET') {
+        try {
+          const metrics = await this.getPrometheusFormattedMetrics();
+          res.writeHead(200, { 'Content-Type': 'text/plain; version=0.0.4' });
+          res.end(metrics);
+        } catch (error) {
+          res.writeHead(500, { 'Content-Type': 'text/plain' });
+          res.end('Error generating metrics');
+          this.logger.log('error', 'Error generating Prometheus metrics', error);
+        }
+      } else {
+        res.writeHead(404, { 'Content-Type': 'text/plain' });
+        res.end('Not Found');
+      }
+    });
+
+    this.prometheusPort = port;
+    this.prometheusServer.listen(port, () => {
+      this.logger.log('info', `Prometheus metrics endpoint available at http://localhost:${port}/metrics`);
+    });
+  }
+
+  public disablePrometheusEndpoint(): void {
+    if (!this.prometheusServer) {
+      return;
+    }
+
+    const port = this.prometheusPort;
+    this.prometheusServer.close(() => {
+      this.logger.log('info', `Prometheus metrics endpoint on port ${port} has been shut down`);
+    });
+
+    this.prometheusServer = undefined;
+    this.prometheusPort = undefined;
+  }
+
  public stop() {
    this.started = false;
+    this.disablePrometheusEndpoint();
  }
 }
--- a/ts/smartmetrics.interfaces.ts
+++ b/ts/smartmetrics.interfaces.ts
@@ -1,13 +1,21 @@
-// this might be extracted into a package @pushrocks/smartmetrics-interfaces in the future
 export interface IMetricsSnapshot {
-  originalMetrics: any[];
+  // existing process/node fields
  process_cpu_seconds_total: number;
  nodejs_active_handles_total: number;
  nodejs_active_requests_total: number;
  nodejs_heap_size_total_bytes: number;
-  cpuPercentage: number;
+  cpuPercentage: number;         // normalized to 0-100% of total machine
  cpuUsageText: string;
  memoryPercentage: number;
  memoryUsageBytes: number;
  memoryUsageText: string;
-}
+  // system-wide fields
+  systemCpuPercent: number;
+  systemMemTotalBytes: number;
+  systemMemAvailableBytes: number;
+  systemMemUsedBytes: number;
+  systemMemUsedPercent: number;
+  systemLoadAvg1: number;
+  systemLoadAvg5: number;
+  systemLoadAvg15: number;
+}
--- a/ts/smartmetrics.pidtree.ts
+++ b/ts/smartmetrics.pidtree.ts
@@ -0,0 +1,55 @@
+import * as fs from 'fs';
+
+// Get all descendant PIDs of the given root PID by reading /proc/<pid>/stat.
+// Returns an array of descendant PIDs (excludes the root itself).
+export async function getChildPids(rootPid: number): Promise<number[]> {
+  const parentMap = new Map<number, number[]>(); // parent → children
+
+  let entries: string[];
+  try {
+    entries = fs.readdirSync('/proc');
+  } catch {
+    return [];
+  }
+
+  for (const entry of entries) {
+    const pid = parseInt(entry, 10);
+    if (isNaN(pid)) continue;
+
+    try {
+      const stat = fs.readFileSync(`/proc/${pid}/stat`, 'utf8');
+      // Format: pid (comm) state ppid ...
+      // comm can contain spaces and parentheses, so find the last ')' first
+      const closeParenIdx = stat.lastIndexOf(')');
+      if (closeParenIdx === -1) continue;
+      const afterComm = stat.slice(closeParenIdx + 2); // skip ') '
+      const fields = afterComm.split(' ');
+      const ppid = parseInt(fields[1], 10); // field index 1 after state is ppid
+
+      if (!parentMap.has(ppid)) {
+        parentMap.set(ppid, []);
+      }
+      parentMap.get(ppid)!.push(pid);
+    } catch {
+      // Process may have exited between readdir and readFile
+      continue;
+    }
+  }
+
+  // BFS from rootPid to collect all descendants
+  const result: number[] = [];
+  const queue: number[] = [rootPid];
+
+  while (queue.length > 0) {
+    const current = queue.shift()!;
+    const children = parentMap.get(current);
+    if (children) {
+      for (const child of children) {
+        result.push(child);
+        queue.push(child);
+      }
+    }
+  }
+
+  return result;
+}
--- a/ts/smartmetrics.pidusage.ts
+++ b/ts/smartmetrics.pidusage.ts
@@ -0,0 +1,129 @@
+import * as fs from 'fs';
+import * as os from 'os';
+import { execSync } from 'child_process';
+
+// CPU core count (cached at module load)
+const cpuCoreCount = typeof os.availableParallelism === 'function'
+  ? os.availableParallelism()
+  : os.cpus().length;
+
+// Cached system constants
+let clkTck: number | null = null;
+let pageSize: number | null = null;
+
+function getClkTck(): number {
+  if (clkTck === null) {
+    try {
+      clkTck = parseInt(execSync('getconf CLK_TCK', { encoding: 'utf8' }).trim(), 10);
+    } catch {
+      clkTck = 100; // standard Linux default
+    }
+  }
+  return clkTck;
+}
+
+function getPageSize(): number {
+  if (pageSize === null) {
+    try {
+      pageSize = parseInt(execSync('getconf PAGESIZE', { encoding: 'utf8' }).trim(), 10);
+    } catch {
+      pageSize = 4096; // standard Linux default
+    }
+  }
+  return pageSize;
+}
+
+// History for CPU delta tracking
+interface ISnapshot {
+  utime: number;
+  stime: number;
+  timestamp: number; // hrtime in seconds
+}
+
+const history = new Map<number, ISnapshot>();
+
+function readProcStat(pid: number): { utime: number; stime: number; rss: number } | null {
+  try {
+    const stat = fs.readFileSync(`/proc/${pid}/stat`, 'utf8');
+    // Format: pid (comm) state ppid ... fields
+    // utime is field 14, stime is field 15, rss is field 24 (1-indexed)
+    const closeParenIdx = stat.lastIndexOf(')');
+    if (closeParenIdx === -1) return null;
+    const afterComm = stat.slice(closeParenIdx + 2);
+    const fields = afterComm.split(' ');
+    // fields[0] = state (field 3), so utime = fields[11] (field 14), stime = fields[12] (field 15), rss = fields[21] (field 24)
+    const utime = parseInt(fields[11], 10);
+    const stime = parseInt(fields[12], 10);
+    const rss = parseInt(fields[21], 10);
+    return { utime, stime, rss };
+  } catch {
+    return null;
+  }
+}
+
+function hrtimeSeconds(): number {
+  const [sec, nsec] = process.hrtime();
+  return sec + nsec / 1e9;
+}
+
+export interface IPidUsageResult {
+  cpu: number;                  // raw per-core CPU% (can exceed 100%)
+  cpuCoreCount: number;         // number of CPU cores on the machine
+  cpuNormalizedPercent: number;  // cpu / coreCount — 0-100% of total machine
+  memory: number;               // RSS in bytes
+}
+
+/**
+ * Get CPU percentage and memory usage for the given PIDs.
+ * CPU% is calculated as a delta between successive calls.
+ */
+export async function getPidUsage(
+  pids: number[]
+): Promise<Record<number, IPidUsageResult>> {
+  const tck = getClkTck();
+  const ps = getPageSize();
+  const result: Record<number, IPidUsageResult> = {};
+
+  for (const pid of pids) {
+    const stat = readProcStat(pid);
+    if (!stat) {
+      continue;
+    }
+
+    const now = hrtimeSeconds();
+    const totalTicks = stat.utime + stat.stime;
+    const memoryBytes = stat.rss * ps;
+
+    const prev = history.get(pid);
+    if (prev) {
+      const elapsedSeconds = now - prev.timestamp;
+      const ticksDelta = totalTicks - (prev.utime + prev.stime);
+      const cpuSeconds = ticksDelta / tck;
+      const cpuPercent = elapsedSeconds > 0 ? (cpuSeconds / elapsedSeconds) * 100 : 0;
+
+      result[pid] = {
+        cpu: cpuPercent,
+        cpuCoreCount,
+        cpuNormalizedPercent: cpuPercent / cpuCoreCount,
+        memory: memoryBytes,
+      };
+    } else {
+      // First call for this PID — no delta available, report 0% cpu
+      result[pid] = {
+        cpu: 0,
+        cpuCoreCount,
+        cpuNormalizedPercent: 0,
+        memory: memoryBytes,
+      };
+    }
+
+    // Update history
+    history.set(pid, {
+      utime: stat.utime,
+      stime: stat.stime,
+      timestamp: now,
+    });
+  }
+
+  return result;
+}
--- a/ts/smartmetrics.plugins.ts
+++ b/ts/smartmetrics.plugins.ts
@@ -1,26 +1,21 @@
 // node native
+import * as v8 from 'v8';
 import * as os from 'os';
+import * as fs from 'fs';
+import * as http from 'http';

-export {
-  os
-}
+export { v8, os, fs, http };

 // pushrocks scope
-import * as smartdelay from '@pushrocks/smartdelay';
-import * as smartlog from '@pushrocks/smartlog';
+import * as smartdelay from '@push.rocks/smartdelay';
+import * as smartlog from '@push.rocks/smartlog';

-export {
-  smartdelay,
-  smartlog
-}
+export { smartdelay, smartlog };

-// third party scope
-import pidusage from 'pidusage';
-import pidtree from 'pidtree';
-import * as promClient from 'prom-client';
+// own implementations (replacing pidtree, pidusage, prom-client)
+import * as pidtree from './smartmetrics.pidtree.js';
+import * as pidusage from './smartmetrics.pidusage.js';
+import * as prom from './smartmetrics.prom.js';
+import * as sysusage from './smartmetrics.sysusage.js';

-export {
-  pidusage,
-  pidtree,
-  promClient
-}
+export { pidtree, pidusage, prom, sysusage };
--- a/ts/smartmetrics.prom.ts
+++ b/ts/smartmetrics.prom.ts
@@ -0,0 +1,671 @@
+import * as v8 from 'v8';
+import * as fs from 'fs';
+import { PerformanceObserver, monitorEventLoopDelay } from 'perf_hooks';
+
+// ── Metric types ────────────────────────────────────────────────────────────
+
+export interface IGaugeConfig {
+  name: string;
+  help: string;
+  registers?: Registry[];
+  labelNames?: string[];
+  collect?: () => void | Promise<void>;
+}
+
+export interface ICounterConfig {
+  name: string;
+  help: string;
+  registers?: Registry[];
+  labelNames?: string[];
+  collect?: () => void | Promise<void>;
+}
+
+export interface IHistogramConfig {
+  name: string;
+  help: string;
+  registers?: Registry[];
+  labelNames?: string[];
+  buckets?: number[];
+  collect?: () => void | Promise<void>;
+}
+
+interface IMetric {
+  name: string;
+  help: string;
+  type: string;
+  collect?: () => void | Promise<void>;
+  getLines(): Promise<string[]>;
+}
+
+// ── Registry ────────────────────────────────────────────────────────────────
+
+export class Registry {
+  private metricsList: IMetric[] = [];
+
+  registerMetric(metric: IMetric): void {
+    this.metricsList.push(metric);
+  }
+
+  async metrics(): Promise<string> {
+    const lines: string[] = [];
+    for (const m of this.metricsList) {
+      if (m.collect) {
+        await m.collect();
+      }
+      lines.push(`# HELP ${m.name} ${m.help}`);
+      lines.push(`# TYPE ${m.name} ${m.type}`);
+      lines.push(...(await m.getLines()));
+    }
+    return lines.join('\n') + '\n';
+  }
+}
+
+// ── Gauge ───────────────────────────────────────────────────────────────────
+
+export class Gauge implements IMetric {
+  public name: string;
+  public help: string;
+  public type = 'gauge';
+  public collect?: () => void | Promise<void>;
+  private value = 0;
+  private labelledValues = new Map<string, number>();
+  constructor(config: IGaugeConfig) {
+    this.name = config.name;
+    this.help = config.help;
+    this.collect = config.collect;
+    if (config.registers) {
+      for (const r of config.registers) {
+        r.registerMetric(this);
+      }
+    }
+  }
+
+  set(labelsOrValue: Record<string, string> | number, value?: number): void {
+    if (typeof labelsOrValue === 'number') {
+      this.value = labelsOrValue;
+    } else {
+      const key = this.labelsToKey(labelsOrValue);
+      this.labelledValues.set(key, value!);
+    }
+  }
+
+  inc(labelsOrAmount?: Record<string, string> | number, amount?: number): void {
+    if (labelsOrAmount === undefined) {
+      this.value += 1;
+    } else if (typeof labelsOrAmount === 'number') {
+      this.value += labelsOrAmount;
+    } else {
+      const key = this.labelsToKey(labelsOrAmount);
+      const cur = this.labelledValues.get(key) || 0;
+      this.labelledValues.set(key, cur + (amount ?? 1));
+    }
+  }
+
+  async getLines(): Promise<string[]> {
+    const lines: string[] = [];
+    if (this.labelledValues.size > 0) {
+      for (const [key, val] of this.labelledValues) {
+        lines.push(`${this.name}{${key}} ${formatValue(val)}`);
+      }
+    } else {
+      lines.push(`${this.name} ${formatValue(this.value)}`);
+    }
+    return lines;
+  }
+
+  /** Reset all values */
+  reset(): void {
+    this.value = 0;
+    this.labelledValues.clear();
+  }
+
+  private labelsToKey(labels: Record<string, string>): string {
+    return Object.entries(labels)
+      .map(([k, v]) => `${k}="${v}"`)
+      .join(',');
+  }
+}
+
+// ── Counter ─────────────────────────────────────────────────────────────────
+
+export class Counter implements IMetric {
+  public name: string;
+  public help: string;
+  public type = 'counter';
+  public collect?: () => void | Promise<void>;
+  private value = 0;
+  private labelledValues = new Map<string, number>();
+
+  constructor(config: ICounterConfig) {
+    this.name = config.name;
+    this.help = config.help;
+    this.collect = config.collect;
+    if (config.registers) {
+      for (const r of config.registers) {
+        r.registerMetric(this);
+      }
+    }
+  }
+
+  inc(labelsOrAmount?: Record<string, string> | number, amount?: number): void {
+    if (labelsOrAmount === undefined) {
+      this.value += 1;
+    } else if (typeof labelsOrAmount === 'number') {
+      this.value += labelsOrAmount;
+    } else {
+      const key = this.labelsToKey(labelsOrAmount);
+      const cur = this.labelledValues.get(key) || 0;
+      this.labelledValues.set(key, cur + (amount ?? 1));
+    }
+  }
+
+  async getLines(): Promise<string[]> {
+    const lines: string[] = [];
+    if (this.labelledValues.size > 0) {
+      for (const [key, val] of this.labelledValues) {
+        lines.push(`${this.name}{${key}} ${formatValue(val)}`);
+      }
+    } else {
+      lines.push(`${this.name} ${formatValue(this.value)}`);
+    }
+    return lines;
+  }
+
+  reset(): void {
+    this.value = 0;
+    this.labelledValues.clear();
+  }
+
+  private labelsToKey(labels: Record<string, string>): string {
+    return Object.entries(labels)
+      .map(([k, v]) => `${k}="${v}"`)
+      .join(',');
+  }
+}
+
+// ── Histogram ───────────────────────────────────────────────────────────────
+
+export class Histogram implements IMetric {
+  public name: string;
+  public help: string;
+  public type = 'histogram';
+  public collect?: () => void | Promise<void>;
+  private bucketBounds: number[];
+  private bucketCounts: number[];
+  private sum = 0;
+  private count = 0;
+  private labelledData = new Map<
+    string,
+    { bucketCounts: number[]; sum: number; count: number }
+  >();
+
+  constructor(config: IHistogramConfig) {
+    this.name = config.name;
+    this.help = config.help;
+    this.bucketBounds = config.buckets || [0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10];
+    this.bucketCounts = new Array(this.bucketBounds.length).fill(0);
+    this.collect = config.collect;
+    if (config.registers) {
+      for (const r of config.registers) {
+        r.registerMetric(this);
+      }
+    }
+  }
+
+  observe(labelsOrValue: Record<string, string> | number, value?: number): void {
+    if (typeof labelsOrValue === 'number') {
+      this.observeUnlabelled(labelsOrValue);
+    } else {
+      const key = this.labelsToKey(labelsOrValue);
+      let data = this.labelledData.get(key);
+      if (!data) {
+        data = {
+          bucketCounts: new Array(this.bucketBounds.length).fill(0),
+          sum: 0,
+          count: 0,
+        };
+        this.labelledData.set(key, data);
+      }
+      data.sum += value!;
+      data.count += 1;
+      for (let i = 0; i < this.bucketBounds.length; i++) {
+        if (value! <= this.bucketBounds[i]) {
+          data.bucketCounts[i]++;
+        }
+      }
+    }
+  }
+
+  private observeUnlabelled(val: number): void {
+    this.sum += val;
+    this.count += 1;
+    for (let i = 0; i < this.bucketBounds.length; i++) {
+      if (val <= this.bucketBounds[i]) {
+        this.bucketCounts[i]++;
+      }
+    }
+  }
+
+  async getLines(): Promise<string[]> {
+    const lines: string[] = [];
+    if (this.labelledData.size > 0) {
+      for (const [key, data] of this.labelledData) {
+        for (let i = 0; i < this.bucketBounds.length; i++) {
+          lines.push(
+            `${this.name}_bucket{${key},le="${this.bucketBounds[i]}"} ${data.bucketCounts[i]}`
+          );
+        }
+        lines.push(`${this.name}_bucket{${key},le="+Inf"} ${data.count}`);
+        lines.push(`${this.name}_sum{${key}} ${formatValue(data.sum)}`);
+        lines.push(`${this.name}_count{${key}} ${data.count}`);
+      }
+    } else {
+      for (let i = 0; i < this.bucketBounds.length; i++) {
+        lines.push(
+          `${this.name}_bucket{le="${this.bucketBounds[i]}"} ${this.bucketCounts[i]}`
+        );
+      }
+      lines.push(`${this.name}_bucket{le="+Inf"} ${this.count}`);
+      lines.push(`${this.name}_sum ${formatValue(this.sum)}`);
+      lines.push(`${this.name}_count ${this.count}`);
+    }
+    return lines;
+  }
+
+  reset(): void {
+    this.sum = 0;
+    this.count = 0;
+    this.bucketCounts.fill(0);
+    this.labelledData.clear();
+  }
+
+  private labelsToKey(labels: Record<string, string>): string {
+    return Object.entries(labels)
+      .map(([k, v]) => `${k}="${v}"`)
+      .join(',');
+  }
+}
+
+// ── Default Metrics Collectors ──────────────────────────────────────────────
+
+export function collectDefaultMetrics(registry: Registry): void {
+  registerProcessCpuTotal(registry);
+  registerProcessStartTime(registry);
+  registerProcessMemory(registry);
+  registerProcessOpenFds(registry);
+  registerProcessMaxFds(registry);
+  registerEventLoopLag(registry);
+  registerProcessHandles(registry);
+  registerProcessRequests(registry);
+  registerProcessResources(registry);
+  registerHeapSizeAndUsed(registry);
+  registerHeapSpaces(registry);
+  registerVersion(registry);
+  registerGc(registry);
+}
+
+function registerProcessCpuTotal(registry: Registry): void {
+  const userGauge = new Gauge({
+    name: 'process_cpu_user_seconds_total',
+    help: 'Total user CPU time spent in seconds.',
+    registers: [registry],
+    collect() {
+      const now = process.cpuUsage();
+      userGauge.set(now.user / 1e6);
+    },
+  });
+
+  const systemGauge = new Gauge({
+    name: 'process_cpu_system_seconds_total',
+    help: 'Total system CPU time spent in seconds.',
+    registers: [registry],
+    collect() {
+      const now = process.cpuUsage();
+      systemGauge.set(now.system / 1e6);
+    },
+  });
+
+  new Gauge({
+    name: 'process_cpu_seconds_total',
+    help: 'Total user and system CPU time spent in seconds.',
+    registers: [registry],
+    collect() {
+      const now = process.cpuUsage();
+      this.set((now.user + now.system) / 1e6);
+    },
+  });
+}
+
+function registerProcessStartTime(registry: Registry): void {
+  const startTimeSeconds = Math.floor(Date.now() / 1000 - process.uptime());
+  new Gauge({
+    name: 'process_start_time_seconds',
+    help: 'Start time of the process since unix epoch in seconds.',
+    registers: [registry],
+    collect() {
+      this.set(startTimeSeconds);
+    },
+  });
+}
+
+function registerProcessMemory(registry: Registry): void {
+  new Gauge({
+    name: 'process_resident_memory_bytes',
+    help: 'Resident memory size in bytes.',
+    registers: [registry],
+    collect() {
+      this.set(process.memoryUsage.rss());
+    },
+  });
+
+  new Gauge({
+    name: 'process_virtual_memory_bytes',
+    help: 'Virtual memory size in bytes.',
+    registers: [registry],
+    collect() {
+      try {
+        const status = fs.readFileSync('/proc/self/status', 'utf8');
+        const match = status.match(/VmSize:\s+(\d+)\s+kB/);
+        if (match) {
+          this.set(parseInt(match[1], 10) * 1024);
+        }
+      } catch {
+        // not on Linux — skip
+      }
+    },
+  });
+
+  new Gauge({
+    name: 'process_heap_bytes',
+    help: 'Process heap size in bytes.',
+    registers: [registry],
+    collect() {
+      this.set(process.memoryUsage().heapUsed);
+    },
+  });
+}
+
+function registerProcessOpenFds(registry: Registry): void {
+  new Gauge({
+    name: 'process_open_fds',
+    help: 'Number of open file descriptors.',
+    registers: [registry],
+    collect() {
+      try {
+        const fds = fs.readdirSync('/proc/self/fd');
+        this.set(fds.length);
+      } catch {
+        this.set(0);
+      }
+    },
+  });
+}
+
+function registerProcessMaxFds(registry: Registry): void {
+  new Gauge({
+    name: 'process_max_fds',
+    help: 'Maximum number of open file descriptors.',
+    registers: [registry],
+    collect() {
+      try {
+        const limits = fs.readFileSync('/proc/self/limits', 'utf8');
+        const match = limits.match(/Max open files\s+(\d+)/);
+        if (match) {
+          this.set(parseInt(match[1], 10));
+        }
+      } catch {
+        this.set(0);
+      }
+    },
+  });
+}
+
+function registerEventLoopLag(registry: Registry): void {
+  let histogram: ReturnType<typeof monitorEventLoopDelay> | null = null;
+  try {
+    histogram = monitorEventLoopDelay({ resolution: 10 });
+    histogram.enable();
+  } catch {
+    // Not available in this runtime
+  }
+
+  new Gauge({
+    name: 'nodejs_eventloop_lag_seconds',
+    help: 'Lag of event loop in seconds.',
+    registers: [registry],
+    collect() {
+      if (histogram) {
+        this.set(histogram.mean / 1e9);
+      }
+    },
+  });
+
+  new Gauge({
+    name: 'nodejs_eventloop_lag_min_seconds',
+    help: 'The minimum recorded event loop delay.',
+    registers: [registry],
+    collect() {
+      if (histogram) {
+        this.set(histogram.min / 1e9);
+      }
+    },
+  });
+
+  new Gauge({
+    name: 'nodejs_eventloop_lag_max_seconds',
+    help: 'The maximum recorded event loop delay.',
+    registers: [registry],
+    collect() {
+      if (histogram) {
+        this.set(histogram.max / 1e9);
+      }
+    },
+  });
+
+  new Gauge({
+    name: 'nodejs_eventloop_lag_mean_seconds',
+    help: 'The mean of the recorded event loop delays.',
+    registers: [registry],
+    collect() {
+      if (histogram) {
+        this.set(histogram.mean / 1e9);
+      }
+    },
+  });
+
+  new Gauge({
+    name: 'nodejs_eventloop_lag_stddev_seconds',
+    help: 'The standard deviation of the recorded event loop delays.',
+    registers: [registry],
+    collect() {
+      if (histogram) {
+        this.set(histogram.stddev / 1e9);
+      }
+    },
+  });
+
+  for (const p of [50, 90, 99]) {
+    new Gauge({
+      name: `nodejs_eventloop_lag_p${p}_seconds`,
+      help: `The ${p}th percentile of the recorded event loop delays.`,
+      registers: [registry],
+      collect() {
+        if (histogram) {
+          this.set(histogram.percentile(p) / 1e9);
+        }
+      },
+    });
+  }
+}
+
+function registerProcessHandles(registry: Registry): void {
+  new Gauge({
+    name: 'nodejs_active_handles_total',
+    help: 'Number of active libuv handles grouped by handle type.',
+    registers: [registry],
+    collect() {
+      const handles = (process as any)._getActiveHandles?.();
+      this.set(handles ? handles.length : 0);
+    },
+  });
+}
+
+function registerProcessRequests(registry: Registry): void {
+  new Gauge({
+    name: 'nodejs_active_requests_total',
+    help: 'Number of active libuv requests grouped by request type.',
+    registers: [registry],
+    collect() {
+      const requests = (process as any)._getActiveRequests?.();
+      this.set(requests ? requests.length : 0);
+    },
+  });
+}
+
+function registerProcessResources(registry: Registry): void {
+  new Gauge({
+    name: 'nodejs_active_resources_total',
+    help: 'Number of active resources that are currently keeping the event loop alive.',
+    registers: [registry],
+    collect() {
+      try {
+        const resources = (process as any).getActiveResourcesInfo?.();
+        this.set(resources ? resources.length : 0);
+      } catch {
+        this.set(0);
+      }
+    },
+  });
+}
+
+function registerHeapSizeAndUsed(registry: Registry): void {
+  new Gauge({
+    name: 'nodejs_heap_size_total_bytes',
+    help: 'Process heap size from Node.js in bytes.',
+    registers: [registry],
+    collect() {
+      this.set(process.memoryUsage().heapTotal);
+    },
+  });
+
+  new Gauge({
+    name: 'nodejs_heap_size_used_bytes',
+    help: 'Process heap size used from Node.js in bytes.',
+    registers: [registry],
+    collect() {
+      this.set(process.memoryUsage().heapUsed);
+    },
+  });
+
+  new Gauge({
+    name: 'nodejs_external_memory_bytes',
+    help: 'Node.js external memory size in bytes.',
+    registers: [registry],
+    collect() {
+      this.set(process.memoryUsage().external);
+    },
+  });
+}
+
+function registerHeapSpaces(registry: Registry): void {
+  const spaceGauge = new Gauge({
+    name: 'nodejs_heap_space_size_total_bytes',
+    help: 'Process heap space size total from Node.js in bytes.',
+    labelNames: ['space'],
+    registers: [registry],
+    collect() {
+      spaceGauge.reset();
+      const spaces = v8.getHeapSpaceStatistics();
+      for (const space of spaces) {
+        spaceGauge.set({ space: space.space_name }, space.space_size);
+      }
+    },
+  });
+
+  const usedGauge = new Gauge({
+    name: 'nodejs_heap_space_size_used_bytes',
+    help: 'Process heap space size used from Node.js in bytes.',
+    labelNames: ['space'],
+    registers: [registry],
+    collect() {
+      usedGauge.reset();
+      const spaces = v8.getHeapSpaceStatistics();
+      for (const space of spaces) {
+        usedGauge.set({ space: space.space_name }, space.space_used_size);
+      }
+    },
+  });
+
+  const availableGauge = new Gauge({
+    name: 'nodejs_heap_space_size_available_bytes',
+    help: 'Process heap space size available from Node.js in bytes.',
+    labelNames: ['space'],
+    registers: [registry],
+    collect() {
+      availableGauge.reset();
+      const spaces = v8.getHeapSpaceStatistics();
+      for (const space of spaces) {
+        availableGauge.set({ space: space.space_name }, space.space_available_size);
+      }
+    },
+  });
+}
+
+function registerVersion(registry: Registry): void {
+  const versionParts = process.version.slice(1).split('.').map(Number);
+  const gauge = new Gauge({
+    name: 'nodejs_version_info',
+    help: 'Node.js version info.',
+    labelNames: ['version', 'major', 'minor', 'patch'],
+    registers: [registry],
+    collect() {
+      gauge.set(
+        {
+          version: process.version,
+          major: String(versionParts[0]),
+          minor: String(versionParts[1]),
+          patch: String(versionParts[2]),
+        },
+        1
+      );
+    },
+  });
+}
+
+function registerGc(registry: Registry): void {
+  const gcHistogram = new Histogram({
+    name: 'nodejs_gc_duration_seconds',
+    help: 'Garbage collection duration by kind, in seconds.',
+    labelNames: ['kind'],
+    buckets: [0.001, 0.01, 0.1, 1, 2, 5],
+    registers: [registry],
+  });
+
+  const kindLabels: Record<number, string> = {
+    1: 'Scavenge',
+    2: 'Mark/Sweep/Compact',
+    4: 'IncrementalMarking',
+    8: 'ProcessWeakCallbacks',
+    15: 'All',
+  };
+
+  try {
+    const obs = new PerformanceObserver((list) => {
+      for (const entry of list.getEntries()) {
+        const gcEntry = entry as any;
+        const kind = kindLabels[gcEntry.detail?.kind ?? gcEntry.kind] || 'Unknown';
+        gcHistogram.observe({ kind }, entry.duration / 1000);
+      }
+    });
+    obs.observe({ entryTypes: ['gc'] });
+  } catch {
+    // GC observation not available
+  }
+}
+
+// ── Helpers ─────────────────────────────────────────────────────────────────
+
+function formatValue(v: number): string {
+  if (Number.isInteger(v)) return String(v);
+  return v.toString();
+}
--- a/ts/smartmetrics.sysusage.ts
+++ b/ts/smartmetrics.sysusage.ts
@@ -0,0 +1,94 @@
+import * as fs from 'fs';
+import * as os from 'os';
+
+export interface ISystemUsageResult {
+  cpuPercent: number;          // 0-100% system-wide CPU utilization
+  memTotalBytes: number;       // total physical RAM
+  memAvailableBytes: number;   // available memory
+  memUsedBytes: number;        // memTotal - memAvailable
+  memUsedPercent: number;      // 0-100%
+  loadAvg1: number;            // 1-min load average
+  loadAvg5: number;            // 5-min load average
+  loadAvg15: number;           // 15-min load average
+}
+
+// History for system CPU delta tracking
+interface ICpuSnapshot {
+  idle: number;
+  total: number;
+}
+
+let prevCpuSnapshot: ICpuSnapshot | null = null;
+
+function readProcStat(): ICpuSnapshot | null {
+  try {
+    const content = fs.readFileSync('/proc/stat', 'utf8');
+    const firstLine = content.split('\n')[0]; // "cpu  user nice system idle iowait irq softirq steal ..."
+    const parts = firstLine.split(/\s+/).slice(1).map(Number);
+    // parts: [user, nice, system, idle, iowait, irq, softirq, steal, ...]
+    const idle = parts[3] + (parts[4] || 0); // idle + iowait
+    const total = parts.reduce((sum, v) => sum + v, 0);
+    return { idle, total };
+  } catch {
+    return null;
+  }
+}
+
+function getMemoryInfo(): { totalBytes: number; availableBytes: number } {
+  try {
+    const content = fs.readFileSync('/proc/meminfo', 'utf8');
+    let memTotal = 0;
+    let memAvailable = 0;
+    for (const line of content.split('\n')) {
+      if (line.startsWith('MemTotal:')) {
+        memTotal = parseInt(line.split(/\s+/)[1], 10) * 1024; // kB to bytes
+      } else if (line.startsWith('MemAvailable:')) {
+        memAvailable = parseInt(line.split(/\s+/)[1], 10) * 1024;
+      }
+    }
+    if (memTotal > 0 && memAvailable > 0) {
+      return { totalBytes: memTotal, availableBytes: memAvailable };
+    }
+  } catch {
+    // fall through to os fallback
+  }
+  // Fallback using os module
+  const totalBytes = os.totalmem();
+  const availableBytes = os.freemem();
+  return { totalBytes, availableBytes };
+}
+
+export async function getSystemUsage(): Promise<ISystemUsageResult> {
+  // CPU
+  let cpuPercent = 0;
+  const currentSnapshot = readProcStat();
+  if (currentSnapshot && prevCpuSnapshot) {
+    const totalDelta = currentSnapshot.total - prevCpuSnapshot.total;
+    const idleDelta = currentSnapshot.idle - prevCpuSnapshot.idle;
+    if (totalDelta > 0) {
+      cpuPercent = ((totalDelta - idleDelta) / totalDelta) * 100;
+    }
+  }
+  if (currentSnapshot) {
+    prevCpuSnapshot = currentSnapshot;
+  }
+
+  // Memory
+  const mem = getMemoryInfo();
+  const memUsedBytes = mem.totalBytes - mem.availableBytes;
+  const memUsedPercent = mem.totalBytes > 0 ? (memUsedBytes / mem.totalBytes) * 100 : 0;
+
+  // Load averages
+  const [loadAvg1, loadAvg5, loadAvg15] = os.loadavg();
+
+  return {
+    cpuPercent,
+    memTotalBytes: mem.totalBytes,
+    memAvailableBytes: mem.availableBytes,
+    memUsedBytes,
+    memUsedPercent,
+    loadAvg1,
+    loadAvg5,
+    loadAvg15,
+  };
+}
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "experimentalDecorators": true,
+    "useDefineForClassFields": false,
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "esModuleInterop": true,
+    "verbatimModuleSyntax": true
+  },
+  "exclude": [
+    "dist_*/**/*.d.ts"
+  ]
+}
--- a/tslint.json
+++ b/tslint.json
@@ -1,17 +0,0 @@
-{
-  "extends": ["tslint:latest", "tslint-config-prettier"],
-  "rules": {
-    "semicolon": [true, "always"],
-    "no-console": false,
-    "ordered-imports": false,
-    "object-literal-sort-keys": false,
-    "member-ordering": {
-      "options":{
-        "order": [
-          "static-method"
-        ]
-      }
-    }
-  },
-  "defaultSeverity": "warning"
-}
Author	SHA1	Message	Date
Juergen Kunz	56757e1c71	v3.0.1	2026-02-19 13:55:53 +00:00
Juergen Kunz	d2ee396cf7	fix(smartmetrics): no code changes detected; no version bump or release required	2026-02-19 13:55:53 +00:00
Juergen Kunz	5a22b87592	v3.0.0	2026-02-19 10:10:58 +00:00
Juergen Kunz	b99d2cc04b	BREAKING CHANGE(smartmetrics): add system-wide metrics collection, Prometheus gauges, and normalized CPU reporting	2026-02-19 10:10:58 +00:00
Juergen Kunz	32d75804c0	update	2026-02-19 09:51:34 +00:00
Juergen Kunz	7c3197455f	update	2026-02-19 09:46:46 +00:00
Juergen Kunz	767a40e01e	v2.0.11	2026-02-19 09:16:43 +00:00
Juergen Kunz	fc017d31b0	fix(deps): bump dependencies, update build script, expand README and npm metadata	2026-02-19 09:16:43 +00:00
Juergen Kunz	f67b093127	2.0.10	2025-06-16 23:43:57 +00:00
Juergen Kunz	6bcdf73a97	fix(readme): update documentation with detailed usage instructions, API references and integration examples	2025-06-09 15:07:09 +00:00
Juergen Kunz	c47732c5fc	fix(readme): Update documentation with detailed usage instructions, API references and integration examples.	2025-06-09 12:34:06 +00:00
Juergen Kunz	f587884e86	2.0.8	2025-06-09 12:07:24 +00:00
Juergen Kunz	30992ea44b	fix(smartmetrics): Refactor metrics calculation and update Prometheus integration documentation	2025-06-09 12:07:24 +00:00
Juergen Kunz	34b09ed7a7	feat: Implement Prometheus metrics exposure in SmartMetrics - Added Prometheus gauges for CPU and memory metrics. - Implemented HTTP server to expose metrics at /metrics endpoint. - Created methods to enable and disable the Prometheus endpoint. - Updated getMetrics() to set gauge values. - Added tests for Prometheus metrics functionality. - Updated documentation plan for Prometheus integration.	2025-06-09 10:31:25 +00:00
Philipp Kunz	9413e0323a	update description	2024-05-29 14:14:43 +02:00
Philipp Kunz	e514209fb8	update tsconfig	2024-04-14 17:58:26 +02:00
Philipp Kunz	fc4bc118d6	update npmextra.json: githost	2024-04-01 21:36:34 +02:00
Philipp Kunz	19ce45deaa	update npmextra.json: githost	2024-04-01 19:58:57 +02:00
Philipp Kunz	1e582023f7	update npmextra.json: githost	2024-03-30 21:47:57 +01:00
Philipp Kunz	d6877f9adf	2.0.7	2023-08-08 17:54:28 +02:00
Philipp Kunz	861e9ab0be	fix(core): update	2023-08-08 17:54:27 +02:00
Philipp Kunz	1460fedbcb	switch to new org scheme	2023-07-10 10:16:33 +02:00
Philipp Kunz	537df1d53e	2.0.6	2023-07-03 11:08:27 +02:00
Philipp Kunz	352d0f8a1e	fix(core): update	2023-07-03 11:08:27 +02:00
Philipp Kunz	8454244f3b	2.0.5	2023-07-02 23:21:02 +02:00
Philipp Kunz	4b6d6feea1	fix(core): update	2023-07-02 23:21:01 +02:00
Philipp Kunz	01306ed3f9	2.0.4	2023-07-02 23:13:48 +02:00
Philipp Kunz	2a2ca66708	fix(core): update	2023-07-02 23:13:47 +02:00
Philipp Kunz	299e50cbf7	2.0.3	2023-07-02 22:23:47 +02:00
Philipp Kunz	1e6af24df0	fix(core): update	2023-07-02 22:23:46 +02:00
Philipp Kunz	66f0dc6815	2.0.2	2023-07-02 22:17:27 +02:00
Philipp Kunz	7d703fe57e	fix(core): update	2023-07-02 22:17:27 +02:00
Philipp Kunz	2ddccdaab1	2.0.1	2022-07-27 12:30:50 +02:00
Philipp Kunz	173b3e2b19	fix(core): update	2022-07-27 12:30:49 +02:00
Philipp Kunz	df7a499c1d	2.0.0	2022-07-27 12:00:39 +02:00
Philipp Kunz	173df91528	BREAKING CHANGE(core): switch to esm	2022-07-27 12:00:38 +02:00
Philipp Kunz	057a0a329e	1.0.17	2021-12-06 20:14:30 +01:00
Philipp Kunz	e53bebf7a1	fix(core): update	2021-12-06 20:14:30 +01:00
Philipp Kunz	c4f5e9338a	1.0.16	2021-08-19 19:22:30 +02:00
Philipp Kunz	dad2bc26fc	fix(core): update	2021-08-19 19:22:29 +02:00
Philipp Kunz	29609eb5ba	1.0.15	2021-08-19 17:29:16 +02:00
Philipp Kunz	0292d9bc13	fix(core): update	2021-08-19 17:29:15 +02:00
Philipp Kunz	69af53a30a	1.0.14	2021-08-15 13:45:33 +02:00
Philipp Kunz	121bfdad43	fix(core): update	2021-08-15 13:45:32 +02:00
Philipp Kunz	f96ed80be0	1.0.13	2021-08-14 22:47:31 +02:00
Philipp Kunz	ce74c3da40	fix(core): update	2021-08-14 22:47:31 +02:00
Philipp Kunz	c108c00963	1.0.12	2021-08-14 21:42:25 +02:00
Philipp Kunz	25de5d5874	fix(core): update	2021-08-14 21:42:25 +02:00