v5.0.1

fix(ziptools,gziptools): Use fflate synchronous APIs for ZIP and GZIP operations for Deno compatibility; add TEntryFilter type and small docs/tests cleanup
v5.0.0
2025-11-25 13:37:27 +00:00 · 2025-11-25 13:37:27 +00:00 · 2025-11-25 12:32:13 +00:00 · 2025-11-25 12:32:13 +00:00 · 2025-11-25 11:59:11 +00:00 · 2025-11-25 11:59:11 +00:00
27 changed files with 12203 additions and 2359 deletions
--- a/.serena/cache/typescript/document_symbols_cache_v23-06-25.pkl
+++ b/.serena/cache/typescript/document_symbols_cache_v23-06-25.pkl
--- a/.serena/project.yml
+++ b/.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: "smartarchive"
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,64 @@
 # Changelog

+## 2025-11-25 - 5.0.1 - fix(ziptools,gziptools)
+Use fflate synchronous APIs for ZIP and GZIP operations for Deno compatibility; add TEntryFilter type and small docs/tests cleanup
+
+- Replace fflate async APIs (zip, unzip, gzip, gunzip with callbacks) with synchronous counterparts (zipSync, unzipSync, gzipSync, gunzipSync) to avoid Web Worker issues in Deno
+- ZipCompressionStream.finalize now uses fflate.zipSync and emits compressed Buffer synchronously
+- GzipTools.compress / decompress now delegate to compressSync / decompressSync for cross-runtime compatibility
+- ZipTools.createZip and ZipTools.extractZip now use zipSync/unzipSync and return Buffers
+- Add TEntryFilter type to ts/interfaces.ts for fluent API entry filtering
+- Minor readme.hints.md updates and small whitespace tidy in tests
+
+## 2025-11-25 - 5.0.0 - BREAKING CHANGE(SmartArchive)
+Refactor public API: rename factory/extraction methods, introduce typed interfaces and improved compression tools
+
+- Renamed SmartArchive factory methods: fromArchiveUrl -> fromUrl, fromArchiveFile -> fromFile, fromArchiveStream -> fromStream; added fromBuffer helper.
+- Renamed extraction APIs: exportToFs -> extractToDirectory and exportToStreamOfStreamFiles -> extractToStream; stream-based helpers updated accordingly.
+- Export surface reorganized (ts/index.ts): core interfaces and errors are exported and new modules (bzip2tools, archiveanalyzer) are publicly available.
+- Introduced strong TypeScript types (ts/interfaces.ts) and centralized error types (ts/errors.ts) including Bzip2Error and BZIP2_ERROR_CODES.
+- Refactored format implementations and stream transforms: GzipTools/GzipCompressionTransform/GzipDecompressionTransform, ZipTools (ZipCompressionStream, ZipDecompressionTransform), TarTools improvements.
+- BZIP2 implementation improvements: new bit iterator (IBitReader), clearer error handling and streaming unbzip2 transform.
+- Updated tests to use the new APIs and method names.
+- Breaking change: public API method names and some class/transform names have changed — this requires code updates for consumers.
+
+## 2025-11-25 - 4.2.4 - fix(plugins)
+Migrate filesystem usage to Node fs/fsPromises and upgrade smartfile to v13; add listFileTree helper and update tests
+
+- Bumped dependency @push.rocks/smartfile to ^13.0.0 and removed unused dependency `through`
+- Replaced usages of smartfile.fs and smartfile.fsStream with Node native fs and fs/promises (createReadStream/createWriteStream, mkdir({recursive:true}), stat, readFile)
+- Added plugins.listFileTree helper (recursive directory lister) and used it in TarTools.packDirectory and tests
+- Updated SmartArchive.exportToFs to use plugins.fs and plugins.fsPromises for directory creation and file writes
+- Updated TarTools to use plugins.fs.createReadStream and plugins.fsPromises.stat when packing directories
+- Converted/updated tests to a Node/Deno-friendly test file (test.node+deno.ts) and switched test helpers to use fsPromises
+- Added readme.hints.md with migration notes for Smartfile v13 and architecture/dependency notes
+
+## 2025-11-25 - 4.2.3 - fix(build)
+Upgrade dev tooling: bump @git.zone/tsbuild, @git.zone/tsrun and @git.zone/tstest versions
+
+- Bump @git.zone/tsbuild from ^2.6.6 to ^3.1.0
+- Bump @git.zone/tsrun from ^1.3.3 to ^2.0.0
+- Bump @git.zone/tstest from ^2.3.4 to ^3.1.3
+
+## 2025-08-18 - 4.2.2 - fix(smartarchive)
+Improve tar entry streaming handling and add in-memory gzip/tgz tests
+
+- Fix tar entry handling: properly consume directory entries (resume stream) and wait for entry end before continuing to next header
+- Wrap tar file entries with a PassThrough so extracted StreamFile instances can be consumed while the tar extractor continues
+- Handle nested archives correctly by piping resultStream -> decompressionStream -> analyzer -> unpacker, avoiding premature end signals
+- Add and expand tests in test/test.gzip.ts: verify package.json and TS/license files after extraction, add in-memory gzip extraction test, and add real tgz-in-memory download+extraction test
+- Minor logging improvements for tar extraction flow
+
+## 2025-08-18 - 4.2.1 - fix(gzip)
+Improve gzip streaming decompression, archive analysis and unpacking; add gzip tests
+
+- Add a streaming DecompressGunzipTransform using fflate.Gunzip with proper _flush handling to support chunked gzip input and avoid buffering issues.
+- Refactor ArchiveAnalyzer: introduce IAnalyzedResult, getAnalyzedStream(), and getDecompressionStream() to better detect mime types and wire appropriate decompression streams (gzip, zip, bzip2, tar).
+- Use SmartRequest response streams converted via stream.Readable.fromWeb for URL sources in SmartArchive.getArchiveStream() to improve remote archive handling.
+- Improve nested archive unpacking and SmartArchive export pipeline: more robust tar/zip handling, consistent SmartDuplex usage and backpressure handling.
+- Enhance exportToFs: ensure directories, improved logging for relative paths, and safer write-stream wiring.
+- Add comprehensive gzip-focused tests (test/test.gzip.ts) covering file extraction, stream extraction, header filename handling, large files, and a real-world tgz-from-URL extraction scenario.
+
 ## 2025-08-18 - 4.2.0 - feat(classes.smartarchive)
 Support URL streams, recursive archive unpacking and filesystem export; improve ZIP/GZIP/BZIP2 robustness; CI and package metadata updates

--- a/deno.lock
+++ b/deno.lock
--- a/dist_ts/index.d.ts
+++ b/dist_ts/index.d.ts
@@ -1,4 +1,8 @@
+export * from './interfaces.js';
+export * from './errors.js';
 export * from './classes.smartarchive.js';
 export * from './classes.tartools.js';
 export * from './classes.ziptools.js';
 export * from './classes.gziptools.js';
+export * from './classes.bzip2tools.js';
+export * from './classes.archiveanalyzer.js';
--- a/dist_ts/index.js
+++ b/dist_ts/index.js
@@ -1,5 +1,13 @@
+// Core types and errors
+export * from './interfaces.js';
+export * from './errors.js';
+// Main archive class
 export * from './classes.smartarchive.js';
+// Format-specific tools
 export * from './classes.tartools.js';
 export * from './classes.ziptools.js';
 export * from './classes.gziptools.js';
-//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiaW5kZXguanMiLCJzb3VyY2VSb290IjoiIiwic291cmNlcyI6WyIuLi90cy9pbmRleC50cyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSxjQUFjLDJCQUEyQixDQUFDO0FBQzFDLGNBQWMsdUJBQXVCLENBQUM7QUFDdEMsY0FBYyx1QkFBdUIsQ0FBQztBQUN0QyxjQUFjLHdCQUF3QixDQUFDIn0=
+export * from './classes.bzip2tools.js';
+// Archive analysis
+export * from './classes.archiveanalyzer.js';
+//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiaW5kZXguanMiLCJzb3VyY2VSb290IjoiIiwic291cmNlcyI6WyIuLi90cy9pbmRleC50cyJdLCJuYW1lcyI6W10sIm1hcHBpbmdzIjoiQUFBQSx3QkFBd0I7QUFDeEIsY0FBYyxpQkFBaUIsQ0FBQztBQUNoQyxjQUFjLGFBQWEsQ0FBQztBQUU1QixxQkFBcUI7QUFDckIsY0FBYywyQkFBMkIsQ0FBQztBQUUxQyx3QkFBd0I7QUFDeEIsY0FBYyx1QkFBdUIsQ0FBQztBQUN0QyxjQUFjLHVCQUF1QixDQUFDO0FBQ3RDLGNBQWMsd0JBQXdCLENBQUM7QUFDdkMsY0FBYyx5QkFBeUIsQ0FBQztBQUV4QyxtQkFBbUI7QUFDbkIsY0FBYyw4QkFBOEIsQ0FBQyJ9
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "@push.rocks/smartarchive",
-  "version": "4.2.0",
+  "version": "5.0.1",
  "description": "A library for working with archive files, providing utilities for compressing and decompressing data.",
  "main": "dist_ts/index.js",
  "typings": "dist_ts/index.d.ts",
@@ -22,7 +22,7 @@
  "homepage": "https://code.foss.global/push.rocks/smartarchive#readme",
  "dependencies": {
    "@push.rocks/smartdelay": "^3.0.5",
-    "@push.rocks/smartfile": "^11.2.7",
+    "@push.rocks/smartfile": "^13.0.0",
    "@push.rocks/smartpath": "^6.0.0",
    "@push.rocks/smartpromise": "^4.2.3",
    "@push.rocks/smartrequest": "^4.2.2",
@@ -33,13 +33,12 @@
    "@types/tar-stream": "^3.1.4",
    "fflate": "^0.8.2",
    "file-type": "^21.0.0",
-    "tar-stream": "^3.1.7",
-    "through": "^2.3.8"
+    "tar-stream": "^3.1.7"
  },
  "devDependencies": {
-    "@git.zone/tsbuild": "^2.6.6",
-    "@git.zone/tsrun": "^1.3.3",
-    "@git.zone/tstest": "^2.3.4"
+    "@git.zone/tsbuild": "^3.1.0",
+    "@git.zone/tsrun": "^2.0.0",
+    "@git.zone/tstest": "^3.1.3"
  },
  "private": false,
  "files": [
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/readme.hints.md
+++ b/readme.hints.md
@@ -1 +1,84 @@
+# Smartarchive Development Hints

+## Architecture Overview
+
+`@push.rocks/smartarchive` uses a **fluent builder pattern** for all archive operations. The main entry point is `SmartArchive.create()` which returns a builder instance.
+
+### Two Operating Modes
+
+1. **Extraction Mode** - Triggered by `.url()`, `.file()`, `.stream()`, or `.buffer()`
+2. **Creation Mode** - Triggered by `.format()` or `.entry()`
+
+Modes are mutually exclusive - you cannot mix extraction and creation methods in the same chain.
+
+## Key Classes
+
+- **SmartArchive** - Main class with fluent API for all operations
+- **TarTools** - TAR-specific operations (pack/extract)
+- **ZipTools** - ZIP-specific operations using fflate
+- **GzipTools** - GZIP compression/decompression using fflate
+- **Bzip2Tools** - BZIP2 decompression (extract only, no creation)
+- **ArchiveAnalyzer** - Format detection via magic bytes
+
+## Dependencies
+
+- **fflate** - Pure JS compression for ZIP/GZIP (works in browser)
+- **tar-stream** - TAR archive handling
+- **file-type** - MIME type detection via magic bytes
+- **@push.rocks/smartfile** - SmartFile and StreamFile classes
+
+## API Changes (v5.0.0)
+
+The v5.0.0 release introduced a complete API refactor:
+
+### Old API (deprecated)
+```typescript
+// Old static factory methods - NO LONGER EXIST
+await SmartArchive.fromUrl(url);
+await SmartArchive.fromFile(path);
+await SmartArchive.fromDirectory(path, options);
+```
+
+### New Fluent API
+```typescript
+// Current fluent builder pattern
+await SmartArchive.create()
+  .url(url)
+  .extract(targetDir);
+
+await SmartArchive.create()
+  .format('tar.gz')
+  .directory(path)
+  .toFile(outputPath);
+```
+
+## Migration Notes (from v4.x)
+
+### Smartfile v13 Changes
+Smartfile v13 removed filesystem operations. Replacements:
+- `smartfile.fs.ensureDir(path)` → `fsPromises.mkdir(path, { recursive: true })`
+- `smartfile.fs.stat(path)` → `fsPromises.stat(path)`
+- `smartfile.fs.toReadStream(path)` → `fs.createReadStream(path)`
+
+### Still using from smartfile
+- `SmartFile` class (in-memory file representation)
+- `StreamFile` class (streaming file handling)
+
+## Testing
+
+```bash
+pnpm test              # Run all tests
+tstest test/test.node+deno.ts --verbose  # Run specific test
+```
+
+Tests use a Verdaccio registry URL (`verdaccio.lossless.digital`) for test archives.
+
+## Key Files
+
+- `ts/classes.smartarchive.ts` - Main SmartArchive class with fluent API
+- `ts/classes.tartools.ts` - TAR operations
+- `ts/classes.ziptools.ts` - ZIP operations
+- `ts/classes.gziptools.ts` - GZIP operations
+- `ts/classes.bzip2tools.ts` - BZIP2 decompression
+- `ts/classes.archiveanalyzer.ts` - Format detection
+- `ts/interfaces.ts` - Type definitions
--- a/readme.md
+++ b/readme.md
@@ -1,29 +1,32 @@
 # @push.rocks/smartarchive 📦

-**Powerful archive manipulation for modern Node.js applications**
+A powerful, streaming-first archive manipulation library with a fluent builder API. Works seamlessly in Node.js and Deno.

-`@push.rocks/smartarchive` is a versatile library for handling archive files with a focus on developer experience. Work with **zip**, **tar**, **gzip**, and **bzip2** formats through a unified, streaming-optimized API.
+## Issue Reporting and Security
+
+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.

 ## Features 🚀

- 📁 **Multi-format support** - Handle `.zip`, `.tar`, `.tar.gz`, `.tgz`, and `.bz2` archives
- 🌊 **Streaming-first architecture** - Process large archives without memory constraints  
- 🔄 **Unified API** - Consistent interface across different archive formats
- 🎯 **Smart detection** - Automatically identifies archive types
- ⚡ **High performance** - Optimized for speed with parallel processing where possible
- 🔧 **Flexible I/O** - Work with files, URLs, and streams seamlessly
- 📊 **Archive analysis** - Inspect contents without extraction
- 🛠️ **Modern TypeScript** - Full type safety and excellent IDE support
+- 📁 **Multi-format support** – Handle `.zip`, `.tar`, `.tar.gz`, `.tgz`, `.gz`, and `.bz2` archives
+- 🌊 **Streaming-first architecture** – Process large archives without memory constraints
+- ✨ **Fluent builder API** – Chain methods for readable, expressive code
+- 🎯 **Smart detection** – Automatically identifies archive types via magic bytes
+- ⚡ **High performance** – Built on `tar-stream` and `fflate` for speed
+- 🔧 **Flexible I/O** – Work with files, URLs, streams, and buffers seamlessly
+- 🛠️ **Modern TypeScript** – Full type safety and excellent IDE support
+- 🔄 **Dual-mode operation** – Extract existing archives OR create new ones
+- 🦕 **Cross-runtime** – Works in both Node.js and Deno environments

 ## Installation 📥

 ```bash
-# Using npm
-npm install @push.rocks/smartarchive
-
 # Using pnpm (recommended)
 pnpm add @push.rocks/smartarchive

+# Using npm
+npm install @push.rocks/smartarchive
+
 # Using yarn
 yarn add @push.rocks/smartarchive
 ```
@@ -36,110 +39,245 @@ yarn add @push.rocks/smartarchive
 import { SmartArchive } from '@push.rocks/smartarchive';

 // Extract a .tar.gz archive from a URL directly to the filesystem
-const archive = await SmartArchive.fromArchiveUrl(
-  'https://github.com/some/repo/archive/main.tar.gz'
-);
-await archive.exportToFs('./extracted');
+await SmartArchive.create()
+  .url('https://registry.npmjs.org/some-package/-/some-package-1.0.0.tgz')
+  .extract('./extracted');
 ```

-### Process archive as a stream
+### Create an archive from entries

 ```typescript
 import { SmartArchive } from '@push.rocks/smartarchive';

-// Stream-based processing for memory efficiency
-const archive = await SmartArchive.fromArchiveFile('./large-archive.zip');
-const streamOfFiles = await archive.exportToStreamOfStreamFiles();
+// Create a tar.gz archive with files
+await SmartArchive.create()
+  .format('tar.gz')
+  .compression(6)
+  .entry('config.json', JSON.stringify({ name: 'myapp' }))
+  .entry('readme.txt', 'Hello World!')
+  .toFile('./backup.tar.gz');
+```

-// Process each file in the archive
-streamOfFiles.on('data', (fileStream) => {
-  console.log(`Processing ${fileStream.path}`);
-  // Handle individual file stream
-});
+### Extract with filtering and path manipulation
+
+```typescript
+import { SmartArchive } from '@push.rocks/smartarchive';
+
+// Extract only JSON files, stripping the first path component
+await SmartArchive.create()
+  .url('https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz')
+  .stripComponents(1)           // Remove 'package/' prefix
+  .include(/\.json$/)           // Only extract JSON files
+  .extract('./node_modules/lodash');
 ```

 ## Core Concepts 💡

-### Archive Sources
+### Fluent Builder Pattern

-`SmartArchive` accepts archives from three sources:
+`SmartArchive` uses a fluent builder pattern where you chain methods to configure the operation:

-1. **URL** - Download and process archives from the web
-2. **File** - Load archives from the local filesystem
-3. **Stream** - Process archives from any Node.js stream
+```typescript
+SmartArchive.create()     // Start a new builder
+  .source(...)            // Configure source (extraction mode)
+  .options(...)           // Set options
+  .terminal()             // Execute the operation
+```

-### Export Destinations
+### Two Operating Modes

-Extract archives to multiple destinations:
+**Extraction Mode** - Load an existing archive and extract/analyze it:
+```typescript
+SmartArchive.create()
+  .url('...')        // or .file(), .stream(), .buffer()
+  .extract('./out')  // or .toSmartFiles(), .list(), etc.
+```

-1. **Filesystem** - Extract directly to a directory
-2. **Stream of files** - Process files individually as streams
-3. **Archive stream** - Re-stream as different format
+**Creation Mode** - Build a new archive from entries:
+```typescript
+SmartArchive.create()
+  .format('tar.gz')  // Set output format
+  .entry(...)        // Add files
+  .toFile('./out.tar.gz')  // or .toBuffer(), .toStream()
+```
+
+> ⚠️ **Note:** You cannot mix extraction and creation methods in the same chain.
+
+## API Reference 📚
+
+### Source Methods (Extraction Mode)
+
+| Method | Description |
+|--------|-------------|
+| `.url(url)` | Load archive from a URL |
+| `.file(path)` | Load archive from local filesystem |
+| `.stream(readable)` | Load archive from any Node.js readable stream |
+| `.buffer(buffer)` | Load archive from an in-memory Buffer |
+
+### Creation Methods (Creation Mode)
+
+| Method | Description |
+|--------|-------------|
+| `.format(fmt)` | Set output format: `'tar'`, `'tar.gz'`, `'tgz'`, `'zip'`, `'gz'` |
+| `.compression(level)` | Set compression level (0-9, default: 6) |
+| `.entry(path, content)` | Add a file entry (string or Buffer content) |
+| `.entries(array)` | Add multiple entries at once |
+| `.directory(path, archiveBase?)` | Add entire directory contents |
+| `.addSmartFile(file, path?)` | Add a SmartFile instance |
+| `.addStreamFile(file, path?)` | Add a StreamFile instance |
+
+### Filter Methods (Both Modes)
+
+| Method | Description |
+|--------|-------------|
+| `.filter(predicate)` | Filter entries with custom function |
+| `.include(pattern)` | Only include entries matching regex/string pattern |
+| `.exclude(pattern)` | Exclude entries matching regex/string pattern |
+
+### Extraction Options
+
+| Method | Description |
+|--------|-------------|
+| `.stripComponents(n)` | Strip N leading path components |
+| `.overwrite(bool)` | Overwrite existing files (default: false) |
+| `.fileName(name)` | Set output filename for single-file archives (gz, bz2) |
+
+### Terminal Methods (Extraction)
+
+| Method | Returns | Description |
+|--------|---------|-------------|
+| `.extract(targetDir)` | `Promise<void>` | Extract to filesystem directory |
+| `.toStreamFiles()` | `Promise<StreamIntake<StreamFile>>` | Get stream of StreamFile objects |
+| `.toSmartFiles()` | `Promise<SmartFile[]>` | Get in-memory SmartFile array |
+| `.extractFile(path)` | `Promise<SmartFile \| null>` | Extract single file by path |
+| `.list()` | `Promise<IArchiveEntryInfo[]>` | List all entries |
+| `.analyze()` | `Promise<IArchiveInfo>` | Get archive metadata |
+| `.hasFile(path)` | `Promise<boolean>` | Check if file exists |
+
+### Terminal Methods (Creation)
+
+| Method | Returns | Description |
+|--------|---------|-------------|
+| `.build()` | `Promise<SmartArchive>` | Build the archive (implicit in other terminals) |
+| `.toBuffer()` | `Promise<Buffer>` | Get archive as Buffer |
+| `.toFile(path)` | `Promise<void>` | Write archive to disk |
+| `.toStream()` | `Promise<Readable>` | Get raw archive stream |

 ## Usage Examples 🔨

-### Working with ZIP files
+### Download and extract npm packages

 ```typescript
 import { SmartArchive } from '@push.rocks/smartarchive';

-// Extract a ZIP file
-const zipArchive = await SmartArchive.fromArchiveFile('./archive.zip');
-await zipArchive.exportToFs('./output');
+const pkg = await SmartArchive.create()
+  .url('https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz');

-// Stream ZIP contents for processing
-const fileStream = await zipArchive.exportToStreamOfStreamFiles();
-fileStream.on('data', (file) => {
-  if (file.path.endsWith('.json')) {
-    // Process JSON files from the archive
-    file.pipe(jsonProcessor);
+// Quick inspection of package.json
+const pkgJson = await pkg.extractFile('package/package.json');
+if (pkgJson) {
+  const metadata = JSON.parse(pkgJson.contents.toString());
+  console.log(`Package: ${metadata.name}@${metadata.version}`);
+}
+
+// Full extraction with path normalization
+await SmartArchive.create()
+  .url('https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz')
+  .stripComponents(1)
+  .extract('./node_modules/lodash');
+```
+
+### Create ZIP archive
+
+```typescript
+import { SmartArchive } from '@push.rocks/smartarchive';
+
+await SmartArchive.create()
+  .format('zip')
+  .compression(9)
+  .entry('report.txt', 'Monthly sales report...')
+  .entry('data/figures.json', JSON.stringify({ revenue: 10000 }))
+  .entry('images/logo.png', pngBuffer)
+  .toFile('./report-bundle.zip');
+```
+
+### Create TAR.GZ from directory
+
+```typescript
+import { SmartArchive } from '@push.rocks/smartarchive';
+
+await SmartArchive.create()
+  .format('tar.gz')
+  .compression(9)
+  .directory('./src', 'source')  // Archive ./src as 'source/' in archive
+  .toFile('./project-backup.tar.gz');
+```
+
+### Stream-based extraction
+
+```typescript
+import { SmartArchive } from '@push.rocks/smartarchive';
+
+const fileStream = await SmartArchive.create()
+  .file('./large-archive.tar.gz')
+  .toStreamFiles();
+
+fileStream.on('data', async (streamFile) => {
+  console.log(`Processing: ${streamFile.relativeFilePath}`);
+
+  if (streamFile.relativeFilePath.endsWith('.json')) {
+    const content = await streamFile.getContentAsBuffer();
+    const data = JSON.parse(content.toString());
+    // Process JSON data...
  }
 });
+
+fileStream.on('end', () => {
+  console.log('Extraction complete');
+});
 ```

-### Working with TAR archives
-
-```typescript
-import { SmartArchive, TarTools } from '@push.rocks/smartarchive';
-
-// Extract a .tar.gz file
-const tarGzArchive = await SmartArchive.fromArchiveFile('./archive.tar.gz');
-await tarGzArchive.exportToFs('./extracted');
-
-// Create a TAR archive (using TarTools directly)
-const tarTools = new TarTools();
-const packStream = await tarTools.packDirectory('./source-directory');
-packStream.pipe(createWriteStream('./output.tar'));
-```
-
-### Extracting from URLs
+### Filter specific file types

 ```typescript
 import { SmartArchive } from '@push.rocks/smartarchive';

-// Download and extract in one operation
-const remoteArchive = await SmartArchive.fromArchiveUrl(
-  'https://example.com/data.tar.gz'
-);
+// Extract only TypeScript files
+const tsFiles = await SmartArchive.create()
+  .url('https://example.com/project.tar.gz')
+  .include(/\.ts$/)
+  .exclude(/node_modules/)
+  .toSmartFiles();

-// Extract to filesystem
-await remoteArchive.exportToFs('./local-dir');
-
-// Or process as stream
-const stream = await remoteArchive.exportToStreamOfStreamFiles();
+for (const file of tsFiles) {
+  console.log(`${file.relative}: ${file.contents.length} bytes`);
+}
 ```

-### Analyzing archive contents
+### Analyze archive without extraction

 ```typescript
 import { SmartArchive } from '@push.rocks/smartarchive';

-// Analyze without extracting
-const archive = await SmartArchive.fromArchiveFile('./archive.zip');
-const analyzer = archive.archiveAnalyzer;
+const archive = SmartArchive.create()
+  .file('./unknown-archive.tar.gz');

-// Use the analyzer to inspect contents
-// (exact implementation depends on analyzer methods)
+// Get format info
+const info = await archive.analyze();
+console.log(`Format: ${info.format}`);
+console.log(`Compressed: ${info.isCompressed}`);
+
+// List contents
+const entries = await archive.list();
+for (const entry of entries) {
+  console.log(`${entry.path} (${entry.isDirectory ? 'dir' : 'file'})`);
+}
+
+// Check for specific file
+if (await archive.hasFile('package.json')) {
+  const pkgFile = await archive.extractFile('package.json');
+  console.log(pkgFile?.contents.toString());
+}
 ```

 ### Working with GZIP files
@@ -148,139 +286,219 @@ const analyzer = archive.archiveAnalyzer;
 import { SmartArchive, GzipTools } from '@push.rocks/smartarchive';

 // Decompress a .gz file
-const gzipArchive = await SmartArchive.fromArchiveFile('./data.json.gz');
-await gzipArchive.exportToFs('./decompressed', 'data.json');
+await SmartArchive.create()
+  .file('./data.json.gz')
+  .fileName('data.json')  // Specify output name (gzip doesn't store filename)
+  .extract('./decompressed');

-// Use GzipTools directly for streaming
+// Use GzipTools directly for compression/decompression
 const gzipTools = new GzipTools();
+
+// Compress a buffer
+const compressed = await gzipTools.compress(Buffer.from('Hello World'), 9);
+const decompressed = await gzipTools.decompress(compressed);
+
+// Synchronous operations
+const compressedSync = gzipTools.compressSync(inputBuffer, 6);
+const decompressedSync = gzipTools.decompressSync(compressedSync);
+
+// Streaming
+const compressStream = gzipTools.getCompressionStream(6);
 const decompressStream = gzipTools.getDecompressionStream();

-createReadStream('./compressed.gz')
-  .pipe(decompressStream)
-  .pipe(createWriteStream('./decompressed'));
+createReadStream('./input.txt')
+  .pipe(compressStream)
+  .pipe(createWriteStream('./output.gz'));
 ```

-### Working with BZIP2 files
+### Working with TAR archives directly

 ```typescript
-import { SmartArchive } from '@push.rocks/smartarchive';
-
-// Handle .bz2 files
-const bzipArchive = await SmartArchive.fromArchiveUrl(
-  'https://example.com/data.bz2'
-);
-await bzipArchive.exportToFs('./extracted', 'data.txt');
-```
-
-### Advanced streaming operations
-
-```typescript
-import { SmartArchive } from '@push.rocks/smartarchive';
-import { pipeline } from 'stream/promises';
-
-// Chain operations with streams
-const archive = await SmartArchive.fromArchiveFile('./archive.tar.gz');
-const exportStream = await archive.exportToStreamOfStreamFiles();
-
-// Process each file in the archive
-await pipeline(
-  exportStream,
-  async function* (source) {
-    for await (const file of source) {
-      if (file.path.endsWith('.log')) {
-        // Process log files
-        yield processLogFile(file);
-      }
-    }
-  },
-  createWriteStream('./processed-logs.txt')
-);
-```
-
-### Creating archives (advanced)
-
-```typescript
-import { SmartArchive } from '@push.rocks/smartarchive';
 import { TarTools } from '@push.rocks/smartarchive';

-// Using SmartArchive to create an archive
-const archive = new SmartArchive();
+const tarTools = new TarTools();

-// Add content to the archive
-archive.addedDirectories.push('./src');
-archive.addedFiles.push('./readme.md');
-archive.addedFiles.push('./package.json');
+// Create a TAR archive manually
+const pack = await tarTools.getPackStream();

-// Export as TAR.GZ
-const tarGzStream = await archive.exportToTarGzStream();
-tarGzStream.pipe(createWriteStream('./output.tar.gz'));
+await tarTools.addFileToPack(pack, {
+  fileName: 'hello.txt',
+  content: 'Hello, World!'
+});
+
+await tarTools.addFileToPack(pack, {
+  fileName: 'data.json',
+  content: Buffer.from(JSON.stringify({ foo: 'bar' }))
+});
+
+pack.finalize();
+pack.pipe(createWriteStream('./output.tar'));
+
+// Pack a directory to TAR.GZ buffer
+const tgzBuffer = await tarTools.packDirectoryToTarGz('./src', 6);
+
+// Pack a directory to TAR.GZ stream
+const tgzStream = await tarTools.packDirectoryToTarGzStream('./src');
 ```

-### Extract and transform
+### Working with ZIP archives directly
+
+```typescript
+import { ZipTools } from '@push.rocks/smartarchive';
+
+const zipTools = new ZipTools();
+
+// Create a ZIP archive from entries
+const zipBuffer = await zipTools.createZip([
+  { archivePath: 'readme.txt', content: 'Hello!' },
+  { archivePath: 'data.bin', content: Buffer.from([0x00, 0x01, 0x02]) }
+], 6);
+
+// Extract a ZIP buffer
+const entries = await zipTools.extractZip(zipBuffer);
+for (const entry of entries) {
+  console.log(`${entry.path}: ${entry.content.length} bytes`);
+}
+```
+
+### In-memory round-trip

 ```typescript
 import { SmartArchive } from '@push.rocks/smartarchive';
-import { Transform } from 'stream';

-// Extract and transform files in one pipeline
-const archive = await SmartArchive.fromArchiveUrl(
-  'https://example.com/source-code.tar.gz'
-);
+// Create archive in memory
+const archive = await SmartArchive.create()
+  .format('tar.gz')
+  .entry('config.json', JSON.stringify({ version: '1.0.0' }))
+  .build();

-const extractStream = await archive.exportToStreamOfStreamFiles();
+const buffer = await archive.toBuffer();

-// Transform TypeScript to JavaScript during extraction
-extractStream.on('data', (fileStream) => {
-  if (fileStream.path.endsWith('.ts')) {
-    fileStream
-      .pipe(typescriptTranspiler())
-      .pipe(createWriteStream(fileStream.path.replace('.ts', '.js')));
-  } else {
-    fileStream.pipe(createWriteStream(fileStream.path));
+// Extract from buffer
+const files = await SmartArchive.create()
+  .buffer(buffer)
+  .toSmartFiles();
+
+for (const file of files) {
+  console.log(`${file.relative}: ${file.contents.toString()}`);
+}
+```
+
+## Real-World Use Cases 🌍
+
+### CI/CD: Download & Extract Build Artifacts
+
+```typescript
+const artifacts = await SmartArchive.create()
+  .url(`${CI_SERVER}/artifacts/build-${BUILD_ID}.zip`)
+  .stripComponents(1)
+  .extract('./dist');
+```
+
+### Backup System
+
+```typescript
+// Create backup
+await SmartArchive.create()
+  .format('tar.gz')
+  .compression(9)
+  .directory('./data')
+  .toFile(`./backups/backup-${Date.now()}.tar.gz`);
+
+// Restore backup
+await SmartArchive.create()
+  .file('./backups/backup-latest.tar.gz')
+  .extract('/restore/location');
+```
+
+### Bundle files for HTTP download
+
+```typescript
+import { SmartArchive } from '@push.rocks/smartarchive';
+
+// Express/Fastify handler
+app.get('/download-bundle', async (req, res) => {
+  const buffer = await SmartArchive.create()
+    .format('zip')
+    .entry('report.pdf', pdfBuffer)
+    .entry('data.xlsx', excelBuffer)
+    .entry('images/chart.png', chartBuffer)
+    .toBuffer();
+
+  res.setHeader('Content-Type', 'application/zip');
+  res.setHeader('Content-Disposition', 'attachment; filename=report-bundle.zip');
+  res.send(buffer);
+});
+```
+
+### Data Pipeline: Process Compressed Datasets
+
+```typescript
+const fileStream = await SmartArchive.create()
+  .url('https://data.source/dataset.tar.gz')
+  .toStreamFiles();
+
+fileStream.on('data', async (file) => {
+  if (file.relativeFilePath.endsWith('.csv')) {
+    const content = await file.getContentAsBuffer();
+    // Stream CSV processing...
  }
 });
 ```

-## API Reference 📚
+## Supported Formats 📋

-### SmartArchive Class
+| Format | Extension(s) | Extract | Create |
+|--------|--------------|---------|--------|
+| TAR | `.tar` | ✅ | ✅ |
+| TAR.GZ / TGZ | `.tar.gz`, `.tgz` | ✅ | ✅ |
+| ZIP | `.zip` | ✅ | ✅ |
+| GZIP | `.gz` | ✅ | ✅ |
+| BZIP2 | `.bz2` | ✅ | ❌ |

-#### Static Methods
+## Type Definitions

- `SmartArchive.fromArchiveUrl(url: string)` - Create from URL
- `SmartArchive.fromArchiveFile(path: string)` - Create from file
- `SmartArchive.fromArchiveStream(stream: NodeJS.ReadableStream)` - Create from stream
+```typescript
+// Supported archive formats
+type TArchiveFormat = 'tar' | 'tar.gz' | 'tgz' | 'zip' | 'gz' | 'bz2';

-#### Instance Methods
+// Compression level (0 = none, 9 = maximum)
+type TCompressionLevel = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;

- `exportToFs(targetDir: string, fileName?: string)` - Extract to filesystem
- `exportToStreamOfStreamFiles()` - Get a stream of file streams
- `exportToTarGzStream()` - Export as TAR.GZ stream
- `getArchiveStream()` - Get the raw archive stream
+// Entry for creating archives
+interface IArchiveEntry {
+  archivePath: string;
+  content: string | Buffer | Readable | SmartFile | StreamFile;
+  size?: number;
+  mode?: number;
+  mtime?: Date;
+}

-#### Properties
+// Information about an archive entry
+interface IArchiveEntryInfo {
+  path: string;
+  size: number;
+  isDirectory: boolean;
+  isFile: boolean;
+  mtime?: Date;
+  mode?: number;
+}

- `archiveAnalyzer` - Analyze archive contents
- `tarTools` - TAR-specific operations
- `zipTools` - ZIP-specific operations
- `gzipTools` - GZIP-specific operations
- `bzip2Tools` - BZIP2-specific operations
-
-### Specialized Tools
-
-Each tool class provides format-specific operations:
-
- **TarTools** - Pack/unpack TAR archives
- **ZipTools** - Handle ZIP compression
- **GzipTools** - GZIP compression/decompression
- **Bzip2Tools** - BZIP2 operations
+// Archive analysis result
+interface IArchiveInfo {
+  format: TArchiveFormat | null;
+  isCompressed: boolean;
+  isArchive: boolean;
+  entries?: IArchiveEntryInfo[];
+}
+```

 ## Performance Tips 🏎️

-1. **Use streaming for large files** - Avoid loading entire archives into memory
-2. **Process files in parallel** - Utilize stream operations for concurrent processing
-3. **Choose the right format** - TAR.GZ for Unix systems, ZIP for cross-platform compatibility
-4. **Enable compression wisely** - Balance between file size and CPU usage
+1. **Use streaming for large files** – `.toStreamFiles()` processes entries one at a time without loading the entire archive
+2. **Provide byte lengths when known** – When using TarTools directly, provide `byteLength` for better performance
+3. **Choose appropriate compression** – Use 1-3 for speed, 6 (default) for balance, 9 for maximum compression
+4. **Filter early** – Use `.include()`/`.exclude()` to skip unwanted entries before processing

 ## Error Handling 🛡️

@@ -288,47 +506,22 @@ Each tool class provides format-specific operations:
 import { SmartArchive } from '@push.rocks/smartarchive';

 try {
-  const archive = await SmartArchive.fromArchiveUrl('https://example.com/file.zip');
-  await archive.exportToFs('./output');
+  await SmartArchive.create()
+    .url('https://example.com/file.zip')
+    .extract('./output');
 } catch (error) {
-  if (error.code === 'ENOENT') {
-    console.error('Archive file not found');
-  } else if (error.code === 'EACCES') {
-    console.error('Permission denied');
+  if (error.message.includes('No source configured')) {
+    console.error('Forgot to specify source');
+  } else if (error.message.includes('No format specified')) {
+    console.error('Forgot to set format for creation');
+  } else if (error.message.includes('extraction mode')) {
+    console.error('Cannot mix extraction and creation methods');
  } else {
-    console.error('Archive extraction failed:', error.message);
+    console.error('Archive operation failed:', error.message);
  }
 }
 ```

-## Real-World Use Cases 🌍
-
-### Backup System
-```typescript
-// Automated backup extraction
-const backup = await SmartArchive.fromArchiveFile('./backup.tar.gz');
-await backup.exportToFs('/restore/location');
-```
-
-### CI/CD Pipeline
-```typescript
-// Download and extract build artifacts
-const artifacts = await SmartArchive.fromArchiveUrl(
-  `${CI_SERVER}/artifacts/build-${BUILD_ID}.zip`
-);
-await artifacts.exportToFs('./dist');
-```
-
-### Data Processing
-```typescript
-// Process compressed datasets
-const dataset = await SmartArchive.fromArchiveUrl(
-  'https://data.source/dataset.tar.bz2'
-);
-const files = await dataset.exportToStreamOfStreamFiles();
-// Process each file in the dataset
-```
-
 ## License and Legal Information

 This 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.
@@ -339,6 +532,10 @@ This repository contains open-source code that is licensed under the MIT License

 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 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.

+### Issue Reporting and Security
+
+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.
+
 ### Company Information

 Task Venture Capital GmbH
--- a/test/plugins.ts
+++ b/test/plugins.ts
@@ -1,7 +1,33 @@
-import * as path from 'path';
+import * as path from 'node:path';
+import * as fs from 'node:fs';
+import * as fsPromises from 'node:fs/promises';
 import * as smartpath from '@push.rocks/smartpath';
 import * as smartfile from '@push.rocks/smartfile';
 import * as smartrequest from '@push.rocks/smartrequest';
 import * as smartstream from '@push.rocks/smartstream';

-export { path, smartpath, smartfile, smartrequest, smartstream };
+export { path, fs, fsPromises, smartpath, smartfile, smartrequest, smartstream };
+
+/**
+ * List files in a directory recursively, returning relative paths
+ */
+export async function listFileTree(dirPath: string, _pattern: string = '**/*'): Promise<string[]> {
+  const results: string[] = [];
+
+  async function walkDir(currentPath: string, relativePath: string = '') {
+    const entries = await fsPromises.readdir(currentPath, { withFileTypes: true });
+    for (const entry of entries) {
+      const entryRelPath = relativePath ? path.join(relativePath, entry.name) : entry.name;
+      const entryFullPath = path.join(currentPath, entry.name);
+
+      if (entry.isDirectory()) {
+        await walkDir(entryFullPath, entryRelPath);
+      } else if (entry.isFile()) {
+        results.push(entryRelPath);
+      }
+    }
+  }
+
+  await walkDir(dirPath);
+  return results;
+}
--- a/test/test.gzip.node+deno.ts
+++ b/test/test.gzip.node+deno.ts
@@ -0,0 +1,382 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+import * as plugins from './plugins.js';
+import * as smartarchive from '../ts/index.js';
+
+const testPaths = {
+  nogitDir: plugins.path.join(
+    plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
+    '../.nogit/',
+  ),
+  gzipTestDir: plugins.path.join(
+    plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
+    '../.nogit/gzip-test',
+  ),
+};
+
+tap.preTask('should prepare test directories', async () => {
+  await plugins.fsPromises.mkdir(testPaths.gzipTestDir, { recursive: true });
+});
+
+tap.test('should create and extract a gzip file', async () => {
+  // Create test data
+  const testContent = 'This is a test file for gzip compression and decompression.\n'.repeat(100);
+  const testFileName = 'test-file.txt';
+  const gzipFileName = 'test-file.txt.gz';
+
+  // Write the original file
+  await plugins.fsPromises.writeFile(
+    plugins.path.join(testPaths.gzipTestDir, testFileName),
+    testContent
+  );
+
+  // Create gzip compressed version using fflate directly
+  const fflate = await import('fflate');
+  const compressed = fflate.gzipSync(Buffer.from(testContent));
+  await plugins.fsPromises.writeFile(
+    plugins.path.join(testPaths.gzipTestDir, gzipFileName),
+    Buffer.from(compressed)
+  );
+
+  // Now test extraction using SmartArchive fluent API
+  const extractPath = plugins.path.join(testPaths.gzipTestDir, 'extracted');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .file(plugins.path.join(testPaths.gzipTestDir, gzipFileName))
+    .fileName('test-file.txt')
+    .extract(extractPath);
+
+  // Read the extracted file
+  const extractedContent = await plugins.fsPromises.readFile(
+    plugins.path.join(extractPath, 'test-file.txt'),
+    'utf8'
+  );
+
+  // Verify the content matches
+  expect(extractedContent).toEqual(testContent);
+});
+
+tap.test('should handle gzip stream extraction', async () => {
+  // Create test data
+  const testContent = 'Stream test data for gzip\n'.repeat(50);
+  const gzipFileName = 'stream-test.txt.gz';
+
+  // Create gzip compressed version
+  const fflate = await import('fflate');
+  const compressed = fflate.gzipSync(Buffer.from(testContent));
+  await plugins.fsPromises.writeFile(
+    plugins.path.join(testPaths.gzipTestDir, gzipFileName),
+    Buffer.from(compressed)
+  );
+
+  // Create a read stream for the gzip file
+  const gzipStream = plugins.fs.createReadStream(
+    plugins.path.join(testPaths.gzipTestDir, gzipFileName)
+  );
+
+  // Test extraction using SmartArchive from stream with fluent API
+  const streamFiles: any[] = [];
+  const resultStream = await smartarchive.SmartArchive.create()
+    .stream(gzipStream)
+    .toStreamFiles();
+
+  await new Promise<void>((resolve, reject) => {
+    resultStream.on('data', (streamFile) => {
+      streamFiles.push(streamFile);
+    });
+    resultStream.on('end', resolve);
+    resultStream.on('error', reject);
+  });
+
+  // Verify we got the expected file
+  expect(streamFiles.length).toBeGreaterThan(0);
+
+  // Read content from the stream file
+  if (streamFiles[0]) {
+    const chunks: Buffer[] = [];
+    const readStream = await streamFiles[0].createReadStream();
+    await new Promise<void>((resolve, reject) => {
+      readStream.on('data', (chunk: Buffer) => chunks.push(chunk));
+      readStream.on('end', resolve);
+      readStream.on('error', reject);
+    });
+
+    const extractedContent = Buffer.concat(chunks).toString();
+    expect(extractedContent).toEqual(testContent);
+  }
+});
+
+tap.test('should handle gzip files with original filename in header', async () => {
+  // Test with a real-world gzip file that includes filename in header
+  const testContent = 'File with name in gzip header\n'.repeat(30);
+  const gzipFileName = 'compressed.gz';
+
+  // Create a proper gzip with filename header using Node's zlib
+  const zlib = await import('node:zlib');
+  const gzipBuffer = await new Promise<Buffer>((resolve, reject) => {
+    zlib.gzip(Buffer.from(testContent), {
+      level: 9,
+    }, (err, result) => {
+      if (err) reject(err);
+      else resolve(result);
+    });
+  });
+
+  await plugins.fsPromises.writeFile(
+    plugins.path.join(testPaths.gzipTestDir, gzipFileName),
+    gzipBuffer
+  );
+
+  // Test extraction with fluent API
+  const extractPath = plugins.path.join(testPaths.gzipTestDir, 'header-test');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .file(plugins.path.join(testPaths.gzipTestDir, gzipFileName))
+    .fileName('compressed.txt')
+    .extract(extractPath);
+
+  // Check if file was extracted (name might be derived from archive name)
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  expect(files.length).toBeGreaterThan(0);
+
+  // Read and verify content
+  const extractedFile = files[0];
+  const extractedContent = await plugins.fsPromises.readFile(
+    plugins.path.join(extractPath, extractedFile || 'compressed.txt'),
+    'utf8'
+  );
+  expect(extractedContent).toEqual(testContent);
+});
+
+tap.test('should handle large gzip files', async () => {
+  // Create a larger test file
+  const largeContent = 'x'.repeat(1024 * 1024); // 1MB of 'x' characters
+  const gzipFileName = 'large-file.txt.gz';
+
+  // Compress the large file
+  const fflate = await import('fflate');
+  const compressed = fflate.gzipSync(Buffer.from(largeContent));
+  await plugins.fsPromises.writeFile(
+    plugins.path.join(testPaths.gzipTestDir, gzipFileName),
+    Buffer.from(compressed)
+  );
+
+  // Test extraction with fluent API
+  const extractPath = plugins.path.join(testPaths.gzipTestDir, 'large-extracted');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .file(plugins.path.join(testPaths.gzipTestDir, gzipFileName))
+    .fileName('large-file.txt')
+    .extract(extractPath);
+
+  // Verify the extracted content
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  expect(files.length).toBeGreaterThan(0);
+
+  const extractedContent = await plugins.fsPromises.readFile(
+    plugins.path.join(extractPath, files[0] || 'large-file.txt'),
+    'utf8'
+  );
+  expect(extractedContent.length).toEqual(largeContent.length);
+  expect(extractedContent).toEqual(largeContent);
+});
+
+tap.test('should handle real-world multi-chunk gzip from URL', async () => {
+  // Test with a real tgz file that will be processed in multiple chunks
+  const testUrl = 'https://registry.npmjs.org/@push.rocks/smartfile/-/smartfile-11.2.7.tgz';
+
+  // Download and extract the archive with fluent API
+  const extractPath = plugins.path.join(testPaths.gzipTestDir, 'real-world-test');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .url(testUrl)
+    .extract(extractPath);
+
+  // Verify extraction worked
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  expect(files.length).toBeGreaterThan(0);
+
+  // Check for expected package structure
+  const hasPackageJson = files.some(f => f.includes('package.json'));
+  expect(hasPackageJson).toBeTrue();
+
+  // Read and verify package.json content
+  const packageJsonPath = files.find(f => f.includes('package.json'));
+  if (packageJsonPath) {
+    const packageJsonContent = await plugins.fsPromises.readFile(
+      plugins.path.join(extractPath, packageJsonPath),
+      'utf8'
+    );
+    const packageJson = JSON.parse(packageJsonContent);
+    expect(packageJson.name).toEqual('@push.rocks/smartfile');
+    expect(packageJson.version).toEqual('11.2.7');
+  }
+
+  // Read and verify a TypeScript file
+  const tsFilePath = files.find(f => f.endsWith('.ts'));
+  if (tsFilePath) {
+    const tsFileContent = await plugins.fsPromises.readFile(
+      plugins.path.join(extractPath, tsFilePath),
+      'utf8'
+    );
+    // TypeScript files should have content
+    expect(tsFileContent.length).toBeGreaterThan(10);
+    console.log(`  ✓ TypeScript file ${tsFilePath} has ${tsFileContent.length} bytes`);
+  }
+
+  // Read and verify license file
+  const licensePath = files.find(f => f.includes('license'));
+  if (licensePath) {
+    const licenseContent = await plugins.fsPromises.readFile(
+      plugins.path.join(extractPath, licensePath),
+      'utf8'
+    );
+    expect(licenseContent).toContain('MIT');
+  }
+
+  // Verify we can read multiple files without corruption
+  const readableFiles = files.filter(f =>
+    f.endsWith('.json') || f.endsWith('.md') || f.endsWith('.ts') || f.endsWith('.js')
+  ).slice(0, 5); // Test first 5 readable files
+
+  for (const file of readableFiles) {
+    const content = await plugins.fsPromises.readFile(
+      plugins.path.join(extractPath, file),
+      'utf8'
+    );
+    expect(content).toBeDefined();
+    expect(content.length).toBeGreaterThan(0);
+    console.log(`  ✓ Successfully read ${file} (${content.length} bytes)`);
+  }
+});
+
+tap.test('should handle gzip extraction fully in memory', async () => {
+  // Create test data in memory
+  const testContent = 'This is test data for in-memory gzip processing\n'.repeat(100);
+
+  // Compress using fflate in memory
+  const fflate = await import('fflate');
+  const compressed = fflate.gzipSync(Buffer.from(testContent));
+
+  // Process through SmartArchive without touching filesystem using fluent API
+  const streamFiles: plugins.smartfile.StreamFile[] = [];
+  const resultStream = await smartarchive.SmartArchive.create()
+    .buffer(Buffer.from(compressed))
+    .toStreamFiles();
+
+  await new Promise<void>((resolve, reject) => {
+    resultStream.on('data', (streamFile: plugins.smartfile.StreamFile) => {
+      streamFiles.push(streamFile);
+    });
+    resultStream.on('end', resolve);
+    resultStream.on('error', reject);
+  });
+
+  // Verify we got a file
+  expect(streamFiles.length).toBeGreaterThan(0);
+
+  // Read the content from memory without filesystem
+  const firstFile = streamFiles[0];
+  const chunks: Buffer[] = [];
+  const readStream = await firstFile.createReadStream();
+
+  await new Promise<void>((resolve, reject) => {
+    readStream.on('data', (chunk: Buffer) => chunks.push(chunk));
+    readStream.on('end', resolve);
+    readStream.on('error', reject);
+  });
+
+  const extractedContent = Buffer.concat(chunks).toString();
+  expect(extractedContent).toEqual(testContent);
+  console.log(`  ✓ In-memory extraction successful (${extractedContent.length} bytes)`);
+});
+
+tap.test('should handle real tgz file fully in memory', async (tools) => {
+  await tools.timeout(10000); // Set 10 second timeout
+  // Download tgz file into memory
+  const response = await plugins.smartrequest.SmartRequest.create()
+    .url('https://registry.npmjs.org/@push.rocks/smartfile/-/smartfile-11.2.7.tgz')
+    .get();
+
+  const tgzBuffer = Buffer.from(await response.arrayBuffer());
+  console.log(`  Downloaded ${tgzBuffer.length} bytes into memory`);
+
+  // Process through SmartArchive in memory with fluent API
+  const streamFiles: plugins.smartfile.StreamFile[] = [];
+  const resultStream = await smartarchive.SmartArchive.create()
+    .buffer(tgzBuffer)
+    .toStreamFiles();
+
+  await new Promise<void>((resolve, reject) => {
+    let timeout: NodeJS.Timeout;
+
+    const cleanup = () => {
+      clearTimeout(timeout);
+    };
+
+    timeout = setTimeout(() => {
+      cleanup();
+      resolve(); // Resolve after timeout if stream doesn't end
+    }, 5000);
+
+    resultStream.on('data', (streamFile: plugins.smartfile.StreamFile) => {
+      streamFiles.push(streamFile);
+    });
+
+    resultStream.on('end', () => {
+      cleanup();
+      resolve();
+    });
+
+    resultStream.on('error', (err) => {
+      cleanup();
+      reject(err);
+    });
+  });
+
+  console.log(`  Extracted ${streamFiles.length} files in memory`);
+  // At minimum we should have extracted something
+  expect(streamFiles.length).toBeGreaterThan(0);
+
+  // Find and read package.json from memory
+  const packageJsonFile = streamFiles.find(f => f.relativeFilePath?.includes('package.json'));
+
+  if (packageJsonFile) {
+    const chunks: Buffer[] = [];
+    const readStream = await packageJsonFile.createReadStream();
+
+    await new Promise<void>((resolve, reject) => {
+      readStream.on('data', (chunk: Buffer) => chunks.push(chunk));
+      readStream.on('end', resolve);
+      readStream.on('error', reject);
+    });
+
+    const packageJsonContent = Buffer.concat(chunks).toString();
+    const packageJson = JSON.parse(packageJsonContent);
+    expect(packageJson.name).toEqual('@push.rocks/smartfile');
+    expect(packageJson.version).toEqual('11.2.7');
+    console.log(`  ✓ Read package.json from memory: ${packageJson.name}@${packageJson.version}`);
+  }
+
+  // Read a few more files to verify integrity
+  const filesToCheck = streamFiles.slice(0, 3);
+  for (const file of filesToCheck) {
+    const chunks: Buffer[] = [];
+    const readStream = await file.createReadStream();
+
+    await new Promise<void>((resolve, reject) => {
+      readStream.on('data', (chunk: Buffer) => chunks.push(chunk));
+      readStream.on('end', resolve);
+      readStream.on('error', reject);
+    });
+
+    const content = Buffer.concat(chunks);
+    expect(content.length).toBeGreaterThan(0);
+    console.log(`  ✓ Read ${file.relativeFilePath} from memory (${content.length} bytes)`);
+  }
+});
+
+export default tap.start();
--- a/test/test.node+deno.ts
+++ b/test/test.node+deno.ts
@@ -0,0 +1,240 @@
+import { tap, expect } from '@git.zone/tstest/tapbundle';
+
+import * as plugins from './plugins.js';
+
+const testPaths = {
+  nogitDir: plugins.path.join(
+    plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
+    '../.nogit/',
+  ),
+  remoteDir: plugins.path.join(
+    plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
+    '../.nogit/remote',
+  ),
+};
+
+import * as smartarchive from '../ts/index.js';
+
+tap.preTask('should prepare .nogit dir', async () => {
+  await plugins.fsPromises.mkdir(testPaths.remoteDir, { recursive: true });
+});
+
+tap.preTask('should prepare downloads', async (tools) => {
+  const response = await plugins.smartrequest.SmartRequest.create()
+    .url(
+      'https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz',
+    )
+    .get();
+  const downloadedFile: Buffer = Buffer.from(await response.arrayBuffer());
+  await plugins.fsPromises.writeFile(
+    plugins.path.join(testPaths.nogitDir, 'test.tgz'),
+    downloadedFile,
+  );
+});
+
+tap.test('should extract existing files on disk using fluent API', async () => {
+  await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .extract(testPaths.nogitDir);
+});
+
+tap.test('should extract from file using fluent API', async () => {
+  const extractPath = plugins.path.join(testPaths.nogitDir, 'from-file-test');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .file(plugins.path.join(testPaths.nogitDir, 'test.tgz'))
+    .extract(extractPath);
+
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  expect(files.length).toBeGreaterThan(0);
+});
+
+tap.test('should extract with stripComponents using fluent API', async () => {
+  const extractPath = plugins.path.join(testPaths.nogitDir, 'strip-test');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .stripComponents(1)
+    .extract(extractPath);
+
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  expect(files.length).toBeGreaterThan(0);
+  // Files should not have 'package/' prefix
+  const hasPackagePrefix = files.some(f => f.startsWith('package/'));
+  expect(hasPackagePrefix).toBeFalse();
+});
+
+tap.test('should extract with filter using fluent API', async () => {
+  const extractPath = plugins.path.join(testPaths.nogitDir, 'filter-test');
+  await plugins.fsPromises.mkdir(extractPath, { recursive: true });
+
+  await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .filter(entry => entry.path.endsWith('.json'))
+    .extract(extractPath);
+
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  // All extracted files should be JSON
+  for (const file of files) {
+    expect(file.endsWith('.json')).toBeTrue();
+  }
+});
+
+tap.test('should list archive entries using fluent API', async () => {
+  const entries = await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .list();
+
+  expect(entries.length).toBeGreaterThan(0);
+  const hasPackageJson = entries.some(e => e.path.includes('package.json'));
+  expect(hasPackageJson).toBeTrue();
+});
+
+tap.test('should create archive using fluent API', async () => {
+  const archive = await smartarchive.SmartArchive.create()
+    .format('tar.gz')
+    .compression(9)
+    .entry('hello.txt', 'Hello World!')
+    .entry('config.json', JSON.stringify({ name: 'test', version: '1.0.0' }));
+
+  expect(archive).toBeInstanceOf(smartarchive.SmartArchive);
+
+  const buffer = await archive.toBuffer();
+  expect(buffer.length).toBeGreaterThan(0);
+});
+
+tap.test('should create and write archive to file using fluent API', async () => {
+  const outputPath = plugins.path.join(testPaths.nogitDir, 'created-archive.tar.gz');
+
+  await smartarchive.SmartArchive.create()
+    .format('tar.gz')
+    .entry('readme.txt', 'This is a test archive')
+    .entry('data/info.json', JSON.stringify({ created: new Date().toISOString() }))
+    .toFile(outputPath);
+
+  // Verify file was created
+  const stats = await plugins.fsPromises.stat(outputPath);
+  expect(stats.size).toBeGreaterThan(0);
+
+  // Verify we can extract it
+  const extractPath = plugins.path.join(testPaths.nogitDir, 'verify-created');
+  await smartarchive.SmartArchive.create()
+    .file(outputPath)
+    .extract(extractPath);
+
+  const files = await plugins.listFileTree(extractPath, '**/*');
+  expect(files).toContain('readme.txt');
+});
+
+tap.test('should create ZIP archive using fluent API', async () => {
+  const outputPath = plugins.path.join(testPaths.nogitDir, 'created-archive.zip');
+
+  await smartarchive.SmartArchive.create()
+    .format('zip')
+    .entry('file1.txt', 'Content 1')
+    .entry('file2.txt', 'Content 2')
+    .toFile(outputPath);
+
+  // Verify file was created
+  const stats = await plugins.fsPromises.stat(outputPath);
+  expect(stats.size).toBeGreaterThan(0);
+});
+
+tap.test('should extract to SmartFiles using fluent API', async () => {
+  const smartFiles = await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .toSmartFiles();
+
+  expect(smartFiles.length).toBeGreaterThan(0);
+
+  const packageJson = smartFiles.find(f => f.relative.includes('package.json'));
+  expect(packageJson).toBeDefined();
+});
+
+tap.test('should analyze archive using fluent API', async () => {
+  const info = await smartarchive.SmartArchive.create()
+    .file(plugins.path.join(testPaths.nogitDir, 'test.tgz'))
+    .analyze();
+
+  expect(info.isArchive).toBeTrue();
+  expect(info.isCompressed).toBeTrue();
+  expect(info.format).toEqual('gz');
+});
+
+tap.test('should check if file exists in archive using fluent API', async () => {
+  const hasPackageJson = await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .hasFile('package.json');
+
+  expect(hasPackageJson).toBeTrue();
+});
+
+tap.test('should extract single file using fluent API', async () => {
+  const packageJson = await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .extractFile('package.json');
+
+  expect(packageJson).toBeDefined();
+  expect(packageJson!.contents.toString()).toContain('websetup');
+});
+
+tap.test('should handle include/exclude patterns', async () => {
+  const smartFiles = await smartarchive.SmartArchive.create()
+    .url('https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz')
+    .include(/\.json$/)
+    .toSmartFiles();
+
+  expect(smartFiles.length).toBeGreaterThan(0);
+  for (const file of smartFiles) {
+    expect(file.relative.endsWith('.json')).toBeTrue();
+  }
+});
+
+tap.test('should throw error when mixing modes', async () => {
+  let threw = false;
+  try {
+    smartarchive.SmartArchive.create()
+      .url('https://example.com/archive.tgz')
+      .entry('file.txt', 'content'); // This should throw
+  } catch (e) {
+    threw = true;
+    expect((e as Error).message).toContain('extraction mode');
+  }
+  expect(threw).toBeTrue();
+});
+
+tap.test('should throw error when no source configured', async () => {
+  let threw = false;
+  try {
+    await smartarchive.SmartArchive.create().extract('./output');
+  } catch (e) {
+    threw = true;
+    expect((e as Error).message).toContain('No source configured');
+  }
+  expect(threw).toBeTrue();
+});
+
+tap.test('should throw error when no format configured', async () => {
+  let threw = false;
+  try {
+    await smartarchive.SmartArchive.create()
+      .entry('file.txt', 'content')
+      .toBuffer();
+  } catch (e) {
+    threw = true;
+    expect((e as Error).message).toContain('No format specified');
+  }
+  expect(threw).toBeTrue();
+});
+
+tap.skip.test('should extract a b2zip', async () => {
+  const dataUrl =
+    'https://daten.offeneregister.de/de_companies_ocdata.jsonl.bz2';
+  await smartarchive.SmartArchive.create()
+    .url(dataUrl)
+    .extract(plugins.path.join(testPaths.nogitDir, 'de_companies_ocdata.jsonl'));
+});
+
+export default tap.start();
--- a/test/test.ts
+++ b/test/test.ts
@@ -1,52 +0,0 @@
-import { tap, expect } from '@git.zone/tstest/tapbundle';
-
-import * as plugins from './plugins.js';
-
-const testPaths = {
-  nogitDir: plugins.path.join(
-    plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
-    '../.nogit/',
-  ),
-  remoteDir: plugins.path.join(
-    plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
-    '../.nogit/remote',
-  ),
-};
-
-import * as smartarchive from '../ts/index.js';
-
-tap.preTask('should prepare .nogit dir', async () => {
-  await plugins.smartfile.fs.ensureDir(testPaths.remoteDir);
-});
-
-tap.preTask('should prepare downloads', async (tools) => {
-  const response = await plugins.smartrequest.SmartRequest.create()
-    .url(
-      'https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz',
-    )
-    .get();
-  const downloadedFile: Buffer = Buffer.from(await response.arrayBuffer());
-  await plugins.smartfile.memory.toFs(
-    downloadedFile,
-    plugins.path.join(testPaths.nogitDir, 'test.tgz'),
-  );
-});
-
-tap.test('should extract existing files on disk', async () => {
-  const testSmartarchive = await smartarchive.SmartArchive.fromArchiveUrl(
-    'https://verdaccio.lossless.digital/@pushrocks%2fwebsetup/-/websetup-2.0.14.tgz',
-  );
-  await testSmartarchive.exportToFs(testPaths.nogitDir);
-});
-
-tap.skip.test('should extract a b2zip', async () => {
-  const dataUrl =
-    'https://daten.offeneregister.de/de_companies_ocdata.jsonl.bz2';
-  const testArchive = await smartarchive.SmartArchive.fromArchiveUrl(dataUrl);
-  await testArchive.exportToFs(
-    plugins.path.join(testPaths.nogitDir, 'de_companies_ocdata.jsonl'),
-    'data.jsonl',
-  );
-});
-
-await tap.start();
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
 */
 export const commitinfo = {
  name: '@push.rocks/smartarchive',
-  version: '4.2.0',
+  version: '5.0.1',
  description: 'A library for working with archive files, providing utilities for compressing and decompressing data.'
 }
--- a/ts/bzip2/bititerator.ts
+++ b/ts/bzip2/bititerator.ts
@@ -1,44 +1,60 @@
-var BITMASK = [0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff];
+import type { IBitReader } from '../interfaces.js';

-// returns a function that reads bits.
-// takes a buffer iterator as input
-export function bitIterator(nextBuffer: () => Buffer) {
-  var bit = 0,
-    byte = 0;
-  var bytes = nextBuffer();
-  var f = function (n) {
-    if (n === null && bit != 0) {
+const BITMASK = [0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff] as const;
+
+/**
+ * Creates a bit reader function for BZIP2 decompression.
+ * Takes a buffer iterator as input and returns a function that reads bits.
+ */
+export function bitIterator(nextBuffer: () => Buffer): IBitReader {
+  let bit = 0;
+  let byte = 0;
+  let bytes = nextBuffer();
+  let _bytesRead = 0;
+
+  const reader = function (n: number | null): number | void {
+    if (n === null && bit !== 0) {
      // align to byte boundary
      bit = 0;
      byte++;
      return;
    }
-    var result = 0;
-    while (n > 0) {
+
+    let result = 0;
+    let remaining = n as number;
+
+    while (remaining > 0) {
      if (byte >= bytes.length) {
        byte = 0;
        bytes = nextBuffer();
      }
-      var left = 8 - bit;
-      if (bit === 0 && n > 0)
-        // @ts-ignore
-        f.bytesRead++;
-      if (n >= left) {
+
+      const left = 8 - bit;
+
+      if (bit === 0 && remaining > 0) {
+        _bytesRead++;
+      }
+
+      if (remaining >= left) {
        result <<= left;
        result |= BITMASK[left] & bytes[byte++];
        bit = 0;
-        n -= left;
+        remaining -= left;
      } else {
-        result <<= n;
-        result |=
-          (bytes[byte] & (BITMASK[n] << (8 - n - bit))) >> (8 - n - bit);
-        bit += n;
-        n = 0;
+        result <<= remaining;
+        result |= (bytes[byte] & (BITMASK[remaining] << (8 - remaining - bit))) >> (8 - remaining - bit);
+        bit += remaining;
+        remaining = 0;
      }
    }
+
    return result;
-  };
-  // @ts-ignore
-  f.bytesRead = 0;
-  return f;
+  } as IBitReader;
+
+  Object.defineProperty(reader, 'bytesRead', {
+    get: () => _bytesRead,
+    enumerable: true,
+  });
+
+  return reader;
 }
--- a/ts/bzip2/bzip2.ts
+++ b/ts/bzip2/bzip2.ts
@@ -1,23 +1,22 @@
-export class Bzip2Error extends Error {
-  public name: string = 'Bzip2Error';
-  public message: string;
-  public stack = new Error().stack;
+import { Bzip2Error, BZIP2_ERROR_CODES } from '../errors.js';
+import type { IBitReader, IHuffmanGroup } from '../interfaces.js';

-  constructor(messageArg: string) {
-    super();
-    this.message = messageArg;
-  }
+// Re-export Bzip2Error for backward compatibility
+export { Bzip2Error };
+
+/**
+ * Throw a BZIP2 error with proper error code
+ */
+function throwError(message: string, code: string = BZIP2_ERROR_CODES.INVALID_BLOCK_DATA): never {
+  throw new Bzip2Error(message, code);
 }

-var messageArg = {
-  Error: function (message) {
-    throw new Bzip2Error(message);
-  },
-};
-
+/**
+ * BZIP2 decompression implementation
+ */
 export class Bzip2 {
-  public Bzip2Error = Bzip2Error;
-  public crcTable = [
+  // CRC32 lookup table for BZIP2
+  public readonly crcTable: readonly number[] = [
    0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
    0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
    0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
@@ -63,14 +62,24 @@ export class Bzip2 {
    0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4,
  ];

-  array = function (bytes) {
-    var bit = 0,
-      byte = 0;
-    var BITMASK = [0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff];
-    return function (n) {
-      var result = 0;
+  // State arrays initialized in header()
+  private byteCount!: Int32Array;
+  private symToByte!: Uint8Array;
+  private mtfSymbol!: Int32Array;
+  private selectors!: Uint8Array;
+
+  /**
+   * Create a bit reader from a byte array
+   */
+  array(bytes: Uint8Array | Buffer): (n: number) => number {
+    let bit = 0;
+    let byte = 0;
+    const BITMASK = [0, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff];
+
+    return function (n: number): number {
+      let result = 0;
      while (n > 0) {
-        var left = 8 - bit;
+        const left = 8 - bit;
        if (n >= left) {
          result <<= left;
          result |= BITMASK[left] & bytes[byte++];
@@ -78,234 +87,341 @@ export class Bzip2 {
          n -= left;
        } else {
          result <<= n;
-          result |=
-            (bytes[byte] & (BITMASK[n] << (8 - n - bit))) >> (8 - n - bit);
+          result |= (bytes[byte] & (BITMASK[n] << (8 - n - bit))) >> (8 - n - bit);
          bit += n;
          n = 0;
        }
      }
      return result;
    };
-  };
+  }

-  simple = function (srcbuffer, stream) {
-    var bits = this.array(srcbuffer);
-    var size = this.header(bits);
-    var ret = false;
-    var bufsize = 100000 * size;
-    var buf = new Int32Array(bufsize);
+  /**
+   * Simple decompression from a buffer
+   */
+  simple(srcbuffer: Uint8Array | Buffer, stream: (byte: number) => void): void {
+    const bits = this.array(srcbuffer);
+    const size = this.header(bits as IBitReader);
+    let ret: number | null = 0;
+    const bufsize = 100000 * size;
+    const buf = new Int32Array(bufsize);

    do {
-      ret = this.decompress(bits, stream, buf, bufsize);
-    } while (!ret);
-  };
+      ret = this.decompress(bits as IBitReader, stream, buf, bufsize, ret);
+    } while (ret !== null);
+  }

-  header = function (bits) {
+  /**
+   * Parse BZIP2 header and return block size
+   */
+  header(bits: IBitReader): number {
    this.byteCount = new Int32Array(256);
    this.symToByte = new Uint8Array(256);
    this.mtfSymbol = new Int32Array(256);
    this.selectors = new Uint8Array(0x8000);

-    if (bits(8 * 3) != 4348520) messageArg.Error('No magic number found');
-
-    var i = bits(8) - 48;
-    if (i < 1 || i > 9) messageArg.Error('Not a BZIP archive');
-    return i;
-  };
-
-  decompress = function (bits, stream, buf, bufsize, streamCRC) {
-    var MAX_HUFCODE_BITS = 20;
-    var MAX_SYMBOLS = 258;
-    var SYMBOL_RUNA = 0;
-    var SYMBOL_RUNB = 1;
-    var GROUP_SIZE = 50;
-    var crc = 0 ^ -1;
-
-    for (var h = '', i = 0; i < 6; i++) h += bits(8).toString(16);
-    if (h == '177245385090') {
-      var finalCRC = bits(32) | 0;
-      if (finalCRC !== streamCRC)
-        messageArg.Error('Error in bzip2: crc32 do not match');
-      // align stream to byte
-      bits(null);
-      return null; // reset streamCRC for next call
+    if (bits(8 * 3) !== 4348520) {
+      throwError('No BZIP2 magic number found at start of stream', BZIP2_ERROR_CODES.NO_MAGIC_NUMBER);
    }
-    if (h != '314159265359') messageArg.Error('eek not valid bzip data');
-    var crcblock = bits(32) | 0; // CRC code
-    if (bits(1)) messageArg.Error('unsupported obsolete version');
-    var origPtr = bits(24);
-    if (origPtr > bufsize)
-      messageArg.Error('Initial position larger than buffer size');
-    var t = bits(16);
-    var symTotal = 0;
-    for (i = 0; i < 16; i++) {
-      if (t & (1 << (15 - i))) {
-        var k = bits(16);
-        for (j = 0; j < 16; j++) {
-          if (k & (1 << (15 - j))) {
+
+    const blockSize = (bits(8) as number) - 48;
+    if (blockSize < 1 || blockSize > 9) {
+      throwError('Invalid BZIP2 archive: block size must be 1-9', BZIP2_ERROR_CODES.INVALID_ARCHIVE);
+    }
+    return blockSize;
+  }
+
+  /**
+   * Decompress a BZIP2 block
+   */
+  decompress(
+    bits: IBitReader,
+    stream: (byte: number) => void,
+    buf: Int32Array,
+    bufsize: number,
+    streamCRC?: number | null
+  ): number | null {
+    const MAX_HUFCODE_BITS = 20;
+    const MAX_SYMBOLS = 258;
+    const SYMBOL_RUNA = 0;
+    const SYMBOL_RUNB = 1;
+    const GROUP_SIZE = 50;
+    let crc = 0 ^ -1;
+
+    // Read block header
+    let headerHex = '';
+    for (let i = 0; i < 6; i++) {
+      headerHex += (bits(8) as number).toString(16);
+    }
+
+    // Check for end-of-stream marker
+    if (headerHex === '177245385090') {
+      const finalCRC = bits(32) as number | 0;
+      if (finalCRC !== streamCRC) {
+        throwError('CRC32 mismatch: stream checksum verification failed', BZIP2_ERROR_CODES.CRC_MISMATCH);
+      }
+      // Align stream to byte boundary
+      bits(null);
+      return null;
+    }
+
+    // Verify block signature (pi digits)
+    if (headerHex !== '314159265359') {
+      throwError('Invalid block header: expected pi signature (0x314159265359)', BZIP2_ERROR_CODES.INVALID_BLOCK_DATA);
+    }
+
+    const crcblock = bits(32) as number | 0;
+
+    if (bits(1)) {
+      throwError('Unsupported obsolete BZIP2 format version', BZIP2_ERROR_CODES.INVALID_ARCHIVE);
+    }
+
+    const origPtr = bits(24) as number;
+    if (origPtr > bufsize) {
+      throwError('Initial position larger than buffer size', BZIP2_ERROR_CODES.BUFFER_OVERFLOW);
+    }
+
+    // Read symbol map
+    let symbolMapBits = bits(16) as number;
+    let symTotal = 0;
+    for (let i = 0; i < 16; i++) {
+      if (symbolMapBits & (1 << (15 - i))) {
+        const subMap = bits(16) as number;
+        for (let j = 0; j < 16; j++) {
+          if (subMap & (1 << (15 - j))) {
            this.symToByte[symTotal++] = 16 * i + j;
          }
        }
      }
    }

-    var groupCount = bits(3);
-    if (groupCount < 2 || groupCount > 6) messageArg.Error('another error');
-    var nSelectors = bits(15);
-    if (nSelectors == 0) messageArg.Error('meh');
-    for (var i = 0; i < groupCount; i++) this.mtfSymbol[i] = i;
+    // Read Huffman groups
+    const groupCount = bits(3) as number;
+    if (groupCount < 2 || groupCount > 6) {
+      throwError('Invalid group count: must be between 2 and 6', BZIP2_ERROR_CODES.INVALID_HUFFMAN);
+    }

-    for (var i = 0; i < nSelectors; i++) {
-      for (var j = 0; bits(1); j++)
-        if (j >= groupCount) messageArg.Error('whoops another error');
-      var uc = this.mtfSymbol[j];
-      for (var k: any = j - 1; k >= 0; k--) {
+    const nSelectors = bits(15) as number;
+    if (nSelectors === 0) {
+      throwError('Invalid selector count: cannot be zero', BZIP2_ERROR_CODES.INVALID_SELECTOR);
+    }
+
+    // Initialize MTF symbol array
+    for (let i = 0; i < groupCount; i++) {
+      this.mtfSymbol[i] = i;
+    }
+
+    // Read selectors using MTF decoding
+    for (let i = 0; i < nSelectors; i++) {
+      let j = 0;
+      while (bits(1)) {
+        j++;
+        if (j >= groupCount) {
+          throwError('Invalid MTF index: exceeds group count', BZIP2_ERROR_CODES.INVALID_HUFFMAN);
+        }
+      }
+      const uc = this.mtfSymbol[j];
+      for (let k = j - 1; k >= 0; k--) {
        this.mtfSymbol[k + 1] = this.mtfSymbol[k];
      }
      this.mtfSymbol[0] = uc;
      this.selectors[i] = uc;
    }

-    var symCount = symTotal + 2;
-    var groups = [];
-    var length = new Uint8Array(MAX_SYMBOLS),
-      temp = new Uint16Array(MAX_HUFCODE_BITS + 1);
+    // Build Huffman tables
+    const symCount = symTotal + 2;
+    const groups: IHuffmanGroup[] = [];
+    const length = new Uint8Array(MAX_SYMBOLS);
+    const temp = new Uint16Array(MAX_HUFCODE_BITS + 1);

-    var hufGroup;
-
-    for (var j = 0; j < groupCount; j++) {
-      t = bits(5); //lengths
-      for (var i = 0; i < symCount; i++) {
+    for (let j = 0; j < groupCount; j++) {
+      let t = bits(5) as number;
+      for (let i = 0; i < symCount; i++) {
        while (true) {
-          if (t < 1 || t > MAX_HUFCODE_BITS)
-            messageArg.Error('I gave up a while ago on writing error messages');
+          if (t < 1 || t > MAX_HUFCODE_BITS) {
+            throwError('Invalid Huffman code length: must be between 1 and 20', BZIP2_ERROR_CODES.INVALID_HUFFMAN);
+          }
          if (!bits(1)) break;
          if (!bits(1)) t++;
          else t--;
        }
        length[i] = t;
      }
-      var minLen, maxLen;
-      minLen = maxLen = length[0];
-      for (var i = 1; i < symCount; i++) {
+
+      let minLen = length[0];
+      let maxLen = length[0];
+      for (let i = 1; i < symCount; i++) {
        if (length[i] > maxLen) maxLen = length[i];
        else if (length[i] < minLen) minLen = length[i];
      }
-      hufGroup = groups[j] = {};
-      hufGroup.permute = new Int32Array(MAX_SYMBOLS);
-      hufGroup.limit = new Int32Array(MAX_HUFCODE_BITS + 1);
-      hufGroup.base = new Int32Array(MAX_HUFCODE_BITS + 1);

-      hufGroup.minLen = minLen;
-      hufGroup.maxLen = maxLen;
-      var base = hufGroup.base;
-      var limit = hufGroup.limit;
-      var pp = 0;
-      for (var i: number = minLen; i <= maxLen; i++)
-        for (var t: any = 0; t < symCount; t++)
-          if (length[t] == i) hufGroup.permute[pp++] = t;
-      for (i = minLen; i <= maxLen; i++) temp[i] = limit[i] = 0;
-      for (i = 0; i < symCount; i++) temp[length[i]]++;
-      pp = t = 0;
-      for (i = minLen; i < maxLen; i++) {
+      const hufGroup: IHuffmanGroup = {
+        permute: new Int32Array(MAX_SYMBOLS),
+        limit: new Int32Array(MAX_HUFCODE_BITS + 1),
+        base: new Int32Array(MAX_HUFCODE_BITS + 1),
+        minLen,
+        maxLen,
+      };
+      groups[j] = hufGroup;
+
+      const base = hufGroup.base;
+      const limit = hufGroup.limit;
+
+      let pp = 0;
+      for (let i = minLen; i <= maxLen; i++) {
+        for (let t = 0; t < symCount; t++) {
+          if (length[t] === i) hufGroup.permute[pp++] = t;
+        }
+      }
+
+      for (let i = minLen; i <= maxLen; i++) {
+        temp[i] = 0;
+        limit[i] = 0;
+      }
+      for (let i = 0; i < symCount; i++) {
+        temp[length[i]]++;
+      }
+
+      pp = 0;
+      let tt = 0;
+      for (let i = minLen; i < maxLen; i++) {
        pp += temp[i];
        limit[i] = pp - 1;
        pp <<= 1;
-        base[i + 1] = pp - (t += temp[i]);
+        base[i + 1] = pp - (tt += temp[i]);
      }
      limit[maxLen] = pp + temp[maxLen] - 1;
      base[minLen] = 0;
    }

-    for (var i = 0; i < 256; i++) {
+    // Initialize for decoding
+    for (let i = 0; i < 256; i++) {
      this.mtfSymbol[i] = i;
      this.byteCount[i] = 0;
    }
-    var runPos, count, symCount: number, selector;
-    runPos = count = symCount = selector = 0;
+
+    let runPos = 0;
+    let count = 0;
+    let symCountRemaining = 0;
+    let selector = 0;
+    let hufGroup = groups[0];
+    let base = hufGroup.base;
+    let limit = hufGroup.limit;
+
+    // Main decoding loop
    while (true) {
-      if (!symCount--) {
-        symCount = GROUP_SIZE - 1;
-        if (selector >= nSelectors)
-          messageArg.Error("meow i'm a kitty, that's an error");
+      if (!symCountRemaining--) {
+        symCountRemaining = GROUP_SIZE - 1;
+        if (selector >= nSelectors) {
+          throwError('Invalid selector index: exceeds available groups', BZIP2_ERROR_CODES.INVALID_SELECTOR);
+        }
        hufGroup = groups[this.selectors[selector++]];
        base = hufGroup.base;
        limit = hufGroup.limit;
      }
-      i = hufGroup.minLen;
-      j = bits(i);
+
+      let i = hufGroup.minLen;
+      let j = bits(i) as number;
+
      while (true) {
-        if (i > hufGroup.maxLen) messageArg.Error("rawr i'm a dinosaur");
+        if (i > hufGroup.maxLen) {
+          throwError('Huffman decoding error: bit length exceeds maximum allowed', BZIP2_ERROR_CODES.INVALID_HUFFMAN);
+        }
        if (j <= limit[i]) break;
        i++;
-        j = (j << 1) | bits(1);
+        j = (j << 1) | (bits(1) as number);
      }
+
      j -= base[i];
-      if (j < 0 || j >= MAX_SYMBOLS) messageArg.Error("moo i'm a cow");
-      var nextSym = hufGroup.permute[j];
-      if (nextSym == SYMBOL_RUNA || nextSym == SYMBOL_RUNB) {
+      if (j < 0 || j >= MAX_SYMBOLS) {
+        throwError('Symbol index out of bounds during Huffman decoding', BZIP2_ERROR_CODES.INVALID_HUFFMAN);
+      }
+
+      const nextSym = hufGroup.permute[j];
+
+      if (nextSym === SYMBOL_RUNA || nextSym === SYMBOL_RUNB) {
        if (!runPos) {
          runPos = 1;
-          t = 0;
+          j = 0;
        }
-        if (nextSym == SYMBOL_RUNA) t += runPos;
-        else t += 2 * runPos;
+        if (nextSym === SYMBOL_RUNA) j += runPos;
+        else j += 2 * runPos;
        runPos <<= 1;
        continue;
      }
+
      if (runPos) {
        runPos = 0;
-        if (count + t > bufsize) messageArg.Error('Boom.');
-        uc = this.symToByte[this.mtfSymbol[0]];
-        this.byteCount[uc] += t;
-        while (t--) buf[count++] = uc;
+        const runLength = j;
+        if (count + runLength > bufsize) {
+          throwError('Run-length overflow: decoded run exceeds buffer capacity', BZIP2_ERROR_CODES.BUFFER_OVERFLOW);
+        }
+        const uc = this.symToByte[this.mtfSymbol[0]];
+        this.byteCount[uc] += runLength;
+        for (let t = 0; t < runLength; t++) {
+          buf[count++] = uc;
+        }
      }
+
      if (nextSym > symTotal) break;
-      if (count >= bufsize)
-        messageArg.Error("I can't think of anything. Error");
-      i = nextSym - 1;
-      uc = this.mtfSymbol[i];
-      for (var k: any = i - 1; k >= 0; k--) {
+
+      if (count >= bufsize) {
+        throwError('Buffer overflow: decoded data exceeds buffer capacity', BZIP2_ERROR_CODES.BUFFER_OVERFLOW);
+      }
+
+      const mtfIndex = nextSym - 1;
+      const uc = this.mtfSymbol[mtfIndex];
+      for (let k = mtfIndex - 1; k >= 0; k--) {
        this.mtfSymbol[k + 1] = this.mtfSymbol[k];
      }
      this.mtfSymbol[0] = uc;
-      uc = this.symToByte[uc];
-      this.byteCount[uc]++;
-      buf[count++] = uc;
+      const decodedByte = this.symToByte[uc];
+      this.byteCount[decodedByte]++;
+      buf[count++] = decodedByte;
    }
-    if (origPtr < 0 || origPtr >= count)
-      messageArg.Error(
-        "I'm a monkey and I'm throwing something at someone, namely you",
-      );
-    var j = 0;
-    for (var i = 0; i < 256; i++) {
-      k = j + this.byteCount[i];
+
+    if (origPtr < 0 || origPtr >= count) {
+      throwError('Invalid original pointer: position outside decoded block', BZIP2_ERROR_CODES.INVALID_POSITION);
+    }
+
+    // Inverse BWT transform
+    let j = 0;
+    for (let i = 0; i < 256; i++) {
+      const k = j + this.byteCount[i];
      this.byteCount[i] = j;
      j = k;
    }
-    for (var i = 0; i < count; i++) {
-      uc = buf[i] & 0xff;
+
+    for (let i = 0; i < count; i++) {
+      const uc = buf[i] & 0xff;
      buf[this.byteCount[uc]] |= i << 8;
      this.byteCount[uc]++;
    }
-    var pos = 0,
-      current = 0,
-      run = 0;
+
+    // Output decoded data
+    let pos = 0;
+    let current = 0;
+    let run = 0;
+
    if (count) {
      pos = buf[origPtr];
      current = pos & 0xff;
      pos >>= 8;
      run = -1;
    }
-    count = count;
-    var copies, previous, outbyte;
-    while (count) {
-      count--;
-      previous = current;
+
+    let remaining = count;
+    while (remaining) {
+      remaining--;
+      const previous = current;
      pos = buf[pos];
      current = pos & 0xff;
      pos >>= 8;
-      if (run++ == 3) {
+
+      let copies: number;
+      let outbyte: number;
+
+      if (run++ === 3) {
        copies = current;
        outbyte = previous;
        current = -1;
@@ -313,19 +429,21 @@ export class Bzip2 {
        copies = 1;
        outbyte = current;
      }
+
      while (copies--) {
-        crc =
-          ((crc << 8) ^ this.crcTable[((crc >> 24) ^ outbyte) & 0xff]) &
-          0xffffffff; // crc32
+        crc = ((crc << 8) ^ this.crcTable[((crc >> 24) ^ outbyte) & 0xff]) & 0xffffffff;
        stream(outbyte);
      }
-      if (current != previous) run = 0;
+
+      if (current !== previous) run = 0;
    }

    crc = (crc ^ -1) >>> 0;
-    if ((crc | 0) != (crcblock | 0))
-      messageArg.Error('Error in bzip2: crc32 do not match');
-    streamCRC = (crc ^ ((streamCRC << 1) | (streamCRC >>> 31))) & 0xffffffff;
-    return streamCRC;
-  };
+    if ((crc | 0) !== (crcblock | 0)) {
+      throwError('CRC32 mismatch: block checksum verification failed', BZIP2_ERROR_CODES.CRC_MISMATCH);
+    }
+
+    const newStreamCRC = (crc ^ (((streamCRC || 0) << 1) | ((streamCRC || 0) >>> 31))) & 0xffffffff;
+    return newStreamCRC;
+  }
 }
--- a/ts/bzip2/index.ts
+++ b/ts/bzip2/index.ts
@@ -1,51 +1,53 @@
 import * as plugins from '../plugins.js';
+import { Bzip2Error, BZIP2_ERROR_CODES } from '../errors.js';
+import type { IBitReader } from '../interfaces.js';

 import { Bzip2 } from './bzip2.js';
 import { bitIterator } from './bititerator.js';

-export function unbzip2Stream() {
+/**
+ * Creates a streaming BZIP2 decompression transform
+ */
+export function unbzip2Stream(): plugins.smartstream.SmartDuplex<Buffer, Buffer> {
  const bzip2Instance = new Bzip2();
-  var bufferQueue = [];
-  var hasBytes = 0;
-  var blockSize = 0;
-  var broken = false;
-  var done = false;
-  var bitReader = null;
-  var streamCRC = null;
+  const bufferQueue: Buffer[] = [];
+  let hasBytes = 0;
+  let blockSize = 0;
+  let broken = false;
+  let bitReader: IBitReader | null = null;
+  let streamCRC: number | null = null;

-  function decompressBlock() {
+  function decompressBlock(): Buffer | undefined {
    if (!blockSize) {
-      blockSize = bzip2Instance.header(bitReader);
+      blockSize = bzip2Instance.header(bitReader!);
      streamCRC = 0;
-    } else {
-      var bufsize = 100000 * blockSize;
-      var buf = new Int32Array(bufsize);
-
-      var chunk = [];
-      var f = function (b) {
-        chunk.push(b);
-      };
-
-      streamCRC = bzip2Instance.decompress(
-        bitReader,
-        f,
-        buf,
-        bufsize,
-        streamCRC,
-      );
-      if (streamCRC === null) {
-        // reset for next bzip2 header
-        blockSize = 0;
-        return;
-      } else {
-        return Buffer.from(chunk);
-      }
+      return undefined;
    }
+
+    const bufsize = 100000 * blockSize;
+    const buf = new Int32Array(bufsize);
+    const chunk: number[] = [];
+
+    const outputFunc = (b: number): void => {
+      chunk.push(b);
+    };
+
+    streamCRC = bzip2Instance.decompress(bitReader!, outputFunc, buf, bufsize, streamCRC);
+
+    if (streamCRC === null) {
+      // Reset for next bzip2 header
+      blockSize = 0;
+      return undefined;
+    }
+
+    return Buffer.from(chunk);
  }

-  var outlength = 0;
-  const decompressAndPush = async () => {
-    if (broken) return;
+  let outlength = 0;
+
+  const decompressAndPush = async (): Promise<Buffer | undefined> => {
+    if (broken) return undefined;
+
    try {
      const resultChunk = decompressBlock();
      if (resultChunk) {
@@ -53,40 +55,39 @@ export function unbzip2Stream() {
      }
      return resultChunk;
    } catch (e) {
-      console.error(e);
      broken = true;
+      if (e instanceof Error) {
+        throw new Bzip2Error(`Decompression failed: ${e.message}`, BZIP2_ERROR_CODES.INVALID_BLOCK_DATA);
+      }
+      throw e;
    }
  };
-  let counter = 0;
-  return new plugins.smartstream.SmartDuplex({
+
+  return new plugins.smartstream.SmartDuplex<Buffer, Buffer>({
    objectMode: true,
    name: 'bzip2',
-    debug: false,
    highWaterMark: 1,
    writeFunction: async function (data, streamTools) {
-      // console.log(`got chunk ${counter++}`)
      bufferQueue.push(data);
      hasBytes += data.length;
+
      if (bitReader === null) {
        bitReader = bitIterator(function () {
-          return bufferQueue.shift();
+          return bufferQueue.shift()!;
        });
      }
-      while (
-        !broken &&
-        hasBytes - bitReader.bytesRead + 1 >= (25000 + 100000 * blockSize || 4)
-      ) {
-        //console.error('decompressing with', hasBytes - bitReader.bytesRead + 1, 'bytes in buffer');
+
+      const threshold = 25000 + 100000 * blockSize || 4;
+      while (!broken && hasBytes - bitReader.bytesRead + 1 >= threshold) {
        const result = await decompressAndPush();
        if (!result) {
          continue;
        }
-        // console.log(result.toString());
        await streamTools.push(result);
      }
+      return null;
    },
    finalFunction: async function (streamTools) {
-      //console.error(x,'last compressing with', hasBytes, 'bytes in buffer');
      while (!broken && bitReader && hasBytes > bitReader.bytesRead) {
        const result = await decompressAndPush();
        if (!result) {
@@ -94,10 +95,11 @@ export function unbzip2Stream() {
        }
        await streamTools.push(result);
      }
-      if (!broken) {
-        if (streamCRC !== null)
-          this.emit('error', new Error('input stream ended prematurely'));
+
+      if (!broken && streamCRC !== null) {
+        this.emit('error', new Bzip2Error('Input stream ended prematurely', BZIP2_ERROR_CODES.PREMATURE_END));
      }
+      return null;
    },
  });
 }
--- a/ts/classes.archiveanalyzer.ts
+++ b/ts/classes.archiveanalyzer.ts
@@ -1,24 +1,41 @@
 import type { SmartArchive } from './classes.smartarchive.js';
+import type { TSupportedMime } from './interfaces.js';
 import * as plugins from './plugins.js';

+/**
+ * Type for decompression streams
+ */
+export type TDecompressionStream =
+  | plugins.stream.Transform
+  | plugins.stream.Duplex
+  | plugins.tarStream.Extract;
+
+/**
+ * Result of archive analysis
+ */
 export interface IAnalyzedResult {
-  fileType: plugins.fileType.FileTypeResult;
+  fileType: plugins.fileType.FileTypeResult | undefined;
  isArchive: boolean;
-  resultStream: plugins.smartstream.SmartDuplex;
-  decompressionStream:
-    | plugins.stream.Transform
-    | plugins.stream.Duplex
-    | plugins.tarStream.Extract;
+  resultStream: plugins.smartstream.SmartDuplex<Buffer, Buffer>;
+  decompressionStream: TDecompressionStream;
 }

+/**
+ * Analyzes archive streams to detect format and provide decompression
+ */
 export class ArchiveAnalyzer {
-  smartArchiveRef: SmartArchive;
+  private smartArchiveRef: SmartArchive;

  constructor(smartArchiveRefArg: SmartArchive) {
    this.smartArchiveRef = smartArchiveRefArg;
  }

-  private async mimeTypeIsArchive(mimeType: string): Promise<boolean> {
+  /**
+   * Check if a MIME type represents an archive format
+   */
+  private async mimeTypeIsArchive(mimeType: string | undefined): Promise<boolean> {
+    if (!mimeType) return false;
+
    const archiveMimeTypes: Set<string> = new Set([
      'application/zip',
      'application/x-rar-compressed',
@@ -26,50 +43,46 @@ export class ArchiveAnalyzer {
      'application/gzip',
      'application/x-7z-compressed',
      'application/x-bzip2',
-      // Add other archive mime types here
    ]);

    return archiveMimeTypes.has(mimeType);
  }

-  private async getDecompressionStream(
-    mimeTypeArg: plugins.fileType.FileTypeResult['mime'],
-  ): Promise<
-    plugins.stream.Transform | plugins.stream.Duplex | plugins.tarStream.Extract
-  > {
+  /**
+   * Get the appropriate decompression stream for a MIME type
+   */
+  private async getDecompressionStream(mimeTypeArg: TSupportedMime): Promise<TDecompressionStream> {
    switch (mimeTypeArg) {
      case 'application/gzip':
        return this.smartArchiveRef.gzipTools.getDecompressionStream();
      case 'application/zip':
        return this.smartArchiveRef.zipTools.getDecompressionStream();
      case 'application/x-bzip2':
-        return await this.smartArchiveRef.bzip2Tools.getDecompressionStream(); // replace with your own bzip2 decompression stream
+        return this.smartArchiveRef.bzip2Tools.getDecompressionStream();
      case 'application/x-tar':
-        return this.smartArchiveRef.tarTools.getDecompressionStream(); // replace with your own tar decompression stream
+        return this.smartArchiveRef.tarTools.getDecompressionStream();
      default:
        // Handle unsupported formats or no decompression needed
        return plugins.smartstream.createPassThrough();
    }
  }

-  public getAnalyzedStream() {
+  /**
+   * Create an analyzed stream that detects archive type and provides decompression
+   * Emits a single IAnalyzedResult object
+   */
+  public getAnalyzedStream(): plugins.smartstream.SmartDuplex<Buffer, IAnalyzedResult> {
    let firstRun = true;
    const resultStream = plugins.smartstream.createPassThrough();
-    const analyzerstream = new plugins.smartstream.SmartDuplex<
-      Buffer,
-      IAnalyzedResult
-    >({
+
+    const analyzerstream = new plugins.smartstream.SmartDuplex<Buffer, IAnalyzedResult>({
      readableObjectMode: true,
      writeFunction: async (chunkArg: Buffer, streamtools) => {
        if (firstRun) {
          firstRun = false;
          const fileType = await plugins.fileType.fileTypeFromBuffer(chunkArg);
-          const decompressionStream = await this.getDecompressionStream(
-            fileType?.mime as any,
-          );
-          /**
-           * analyzed stream emits once with this object
-           */
+          const decompressionStream = await this.getDecompressionStream(fileType?.mime as TSupportedMime);
+
          const result: IAnalyzedResult = {
            fileType,
            isArchive: await this.mimeTypeIsArchive(fileType?.mime),
@@ -81,11 +94,12 @@ export class ArchiveAnalyzer {
        await resultStream.backpressuredPush(chunkArg);
        return null;
      },
-      finalFunction: async (tools) => {
+      finalFunction: async () => {
        resultStream.push(null);
        return null;
      },
    });
+
    return analyzerstream;
  }
 }
--- a/ts/classes.gziptools.ts
+++ b/ts/classes.gziptools.ts
@@ -1,62 +1,138 @@
-import type { SmartArchive } from './classes.smartarchive.js';
 import * as plugins from './plugins.js';
+import type { TCompressionLevel } from './interfaces.js';

-// This class wraps fflate's gunzip in a Node.js Transform stream
-export class CompressGunzipTransform extends plugins.stream.Transform {
-  constructor() {
+/**
+ * Transform stream for GZIP compression using fflate
+ */
+export class GzipCompressionTransform extends plugins.stream.Transform {
+  private gzip: plugins.fflate.Gzip;
+
+  constructor(level: TCompressionLevel = 6) {
    super();
+
+    // Create a streaming Gzip compressor
+    this.gzip = new plugins.fflate.Gzip({ level }, (chunk, final) => {
+      this.push(Buffer.from(chunk));
+      if (final) {
+        this.push(null);
+      }
+    });
  }

  _transform(
    chunk: Buffer,
    encoding: BufferEncoding,
-    callback: plugins.stream.TransformCallback,
-  ) {
-    plugins.fflate.gunzip(chunk, (err, decompressed) => {
-      if (err) {
-        callback(err);
-      } else {
-        this.push(decompressed);
-        callback();
-      }
-    });
+    callback: plugins.stream.TransformCallback
+  ): void {
+    try {
+      this.gzip.push(chunk, false);
+      callback();
+    } catch (err) {
+      callback(err as Error);
+    }
+  }
+
+  _flush(callback: plugins.stream.TransformCallback): void {
+    try {
+      this.gzip.push(new Uint8Array(0), true);
+      callback();
+    } catch (err) {
+      callback(err as Error);
+    }
  }
 }

-// DecompressGunzipTransform class that extends the Node.js Transform stream to
-// create a stream that decompresses GZip-compressed data using fflate's gunzip function
-export class DecompressGunzipTransform extends plugins.stream.Transform {
+/**
+ * Transform stream for GZIP decompression using fflate
+ */
+export class GzipDecompressionTransform extends plugins.stream.Transform {
+  private gunzip: plugins.fflate.Gunzip;
+
  constructor() {
    super();
+
+    // Create a streaming Gunzip decompressor
+    this.gunzip = new plugins.fflate.Gunzip((chunk, final) => {
+      this.push(Buffer.from(chunk));
+      if (final) {
+        this.push(null);
+      }
+    });
  }

  _transform(
    chunk: Buffer,
    encoding: BufferEncoding,
-    callback: plugins.stream.TransformCallback,
-  ) {
-    // Use fflate's gunzip function to decompress the chunk
-    plugins.fflate.gunzip(chunk, (err, decompressed) => {
-      if (err) {
-        // If an error occurs during decompression, pass the error to the callback
-        callback(err);
-      } else {
-        // If decompression is successful, push the decompressed data into the stream
-        this.push(decompressed);
-        callback();
-      }
-    });
+    callback: plugins.stream.TransformCallback
+  ): void {
+    try {
+      this.gunzip.push(chunk, false);
+      callback();
+    } catch (err) {
+      callback(err as Error);
+    }
+  }
+
+  _flush(callback: plugins.stream.TransformCallback): void {
+    try {
+      this.gunzip.push(new Uint8Array(0), true);
+      callback();
+    } catch (err) {
+      callback(err as Error);
+    }
  }
 }

+/**
+ * GZIP compression and decompression utilities
+ */
 export class GzipTools {
-  constructor() {}
-
-  public getCompressionStream() {
-    return new CompressGunzipTransform();
+  /**
+   * Get a streaming compression transform
+   */
+  public getCompressionStream(level?: TCompressionLevel): plugins.stream.Transform {
+    return new GzipCompressionTransform(level);
  }

-  public getDecompressionStream() {
-    return new DecompressGunzipTransform();
+  /**
+   * Get a streaming decompression transform
+   */
+  public getDecompressionStream(): plugins.stream.Transform {
+    return new GzipDecompressionTransform();
+  }
+
+  /**
+   * Compress data synchronously
+   */
+  public compressSync(data: Buffer, level?: TCompressionLevel): Buffer {
+    const options = level !== undefined ? { level } : undefined;
+    return Buffer.from(plugins.fflate.gzipSync(data, options));
+  }
+
+  /**
+   * Decompress data synchronously
+   */
+  public decompressSync(data: Buffer): Buffer {
+    return Buffer.from(plugins.fflate.gunzipSync(data));
+  }
+
+  /**
+   * Compress data asynchronously
+   * Note: Uses sync version for Deno compatibility (fflate async uses Web Workers
+   * which have issues in Deno)
+   */
+  public async compress(data: Buffer, level?: TCompressionLevel): Promise<Buffer> {
+    // Use sync version wrapped in Promise for cross-runtime compatibility
+    return this.compressSync(data, level);
+  }
+
+  /**
+   * Decompress data asynchronously
+   * Note: Uses sync version for Deno compatibility (fflate async uses Web Workers
+   * which have issues in Deno)
+   */
+  public async decompress(data: Buffer): Promise<Buffer> {
+    // Use sync version wrapped in Promise for cross-runtime compatibility
+    return this.decompressSync(data);
  }
 }
--- a/ts/classes.smartarchive.ts
+++ b/ts/classes.smartarchive.ts
--- a/ts/classes.tartools.ts
+++ b/ts/classes.tartools.ts
@@ -1,11 +1,14 @@
-import type { SmartArchive } from './classes.smartarchive.js';
 import * as plugins from './plugins.js';
+import type { IArchiveEntry, TCompressionLevel } from './interfaces.js';
+import { GzipTools } from './classes.gziptools.js';

+/**
+ * TAR archive creation and extraction utilities
+ */
 export class TarTools {
-  // INSTANCE
-  constructor() {}
-
-  // packing
+  /**
+   * Add a file to a TAR pack stream
+   */
  public async addFileToPack(
    pack: plugins.tarStream.Pack,
    optionsArg: {
@@ -13,12 +16,12 @@ export class TarTools {
      content?:
        | string
        | Buffer
-        | plugins.smartstream.stream.Readable
+        | plugins.stream.Readable
        | plugins.smartfile.SmartFile
        | plugins.smartfile.StreamFile;
      byteLength?: number;
      filePath?: string;
-    },
+    }
  ): Promise<void> {
    return new Promise<void>(async (resolve, reject) => {
      let fileName: string | null = null;
@@ -26,18 +29,20 @@ export class TarTools {
      if (optionsArg.fileName) {
        fileName = optionsArg.fileName;
      } else if (optionsArg.content instanceof plugins.smartfile.SmartFile) {
-        fileName = (optionsArg.content as plugins.smartfile.SmartFile).relative;
+        fileName = optionsArg.content.relative;
      } else if (optionsArg.content instanceof plugins.smartfile.StreamFile) {
-        fileName = (optionsArg.content as plugins.smartfile.StreamFile)
-          .relativeFilePath;
+        fileName = optionsArg.content.relativeFilePath;
      } else if (optionsArg.filePath) {
        fileName = optionsArg.filePath;
      }

-      /**
-       * contentByteLength is used to set the size of the entry in the tar file
-       */
-      let contentByteLength: number;
+      if (!fileName) {
+        reject(new Error('No filename specified for TAR entry'));
+        return;
+      }
+
+      // Determine content byte length
+      let contentByteLength: number | undefined;
      if (optionsArg.byteLength) {
        contentByteLength = optionsArg.byteLength;
      } else if (typeof optionsArg.content === 'string') {
@@ -45,95 +50,159 @@ export class TarTools {
      } else if (Buffer.isBuffer(optionsArg.content)) {
        contentByteLength = optionsArg.content.length;
      } else if (optionsArg.content instanceof plugins.smartfile.SmartFile) {
-        contentByteLength = await optionsArg.content.getSize(); // assuming SmartFile has getSize method
+        contentByteLength = await optionsArg.content.getSize();
      } else if (optionsArg.content instanceof plugins.smartfile.StreamFile) {
-        contentByteLength = await optionsArg.content.getSize(); // assuming StreamFile has getSize method
-      } else if (
-        optionsArg.content instanceof plugins.smartstream.stream.Readable
-      ) {
-        console.warn(
-          '@push.rocks/smartarchive: When streaming, it is recommended to provide byteLength, if known.',
-        );
+        contentByteLength = await optionsArg.content.getSize();
      } else if (optionsArg.filePath) {
-        const fileStat = await plugins.smartfile.fs.stat(optionsArg.filePath);
+        const fileStat = await plugins.fsPromises.stat(optionsArg.filePath);
        contentByteLength = fileStat.size;
      }

-      /**
-       * here we try to harmonize all kind of entries towards a readable stream
-       */
-      let content: plugins.smartstream.stream.Readable;
+      // Convert all content types to Readable stream
+      let content: plugins.stream.Readable;
      if (Buffer.isBuffer(optionsArg.content)) {
-        content = plugins.smartstream.stream.Readable.from(optionsArg.content);
+        content = plugins.stream.Readable.from(optionsArg.content);
      } else if (typeof optionsArg.content === 'string') {
-        content = plugins.smartstream.stream.Readable.from(
-          Buffer.from(optionsArg.content),
-        );
+        content = plugins.stream.Readable.from(Buffer.from(optionsArg.content));
      } else if (optionsArg.content instanceof plugins.smartfile.SmartFile) {
-        content = plugins.smartstream.stream.Readable.from(
-          optionsArg.content.contents,
-        );
+        content = plugins.stream.Readable.from(optionsArg.content.contents);
      } else if (optionsArg.content instanceof plugins.smartfile.StreamFile) {
        content = await optionsArg.content.createReadStream();
-      } else if (
-        optionsArg.content instanceof plugins.smartstream.stream.Readable
-      ) {
+      } else if (optionsArg.content instanceof plugins.stream.Readable) {
        content = optionsArg.content;
+      } else if (optionsArg.filePath) {
+        content = plugins.fs.createReadStream(optionsArg.filePath);
+      } else {
+        reject(new Error('No content or filePath specified for TAR entry'));
+        return;
      }

      const entry = pack.entry(
        {
          name: fileName,
-          ...(contentByteLength
-            ? {
-                size: contentByteLength,
-              }
-            : null),
+          ...(contentByteLength !== undefined ? { size: contentByteLength } : {}),
        },
-        (err: Error) => {
+        (err: Error | null) => {
          if (err) {
            reject(err);
          } else {
            resolve();
          }
-        },
+        }
      );

      content.pipe(entry);
-      resolve();
+      // Note: resolve() is called in the callback above when pipe completes
    });
  }

  /**
-   * packs a directory from disk into a tar stream
-   * @param directoryPath
+   * Pack a directory into a TAR stream
   */
-  public async packDirectory(directoryPath: string) {
-    const fileTree = await plugins.smartfile.fs.listFileTree(
-      directoryPath,
-      '**/*',
-    );
+  public async packDirectory(directoryPath: string): Promise<plugins.tarStream.Pack> {
+    const fileTree = await plugins.listFileTree(directoryPath, '**/*');
    const pack = await this.getPackStream();
+
    for (const filePath of fileTree) {
      const absolutePath = plugins.path.join(directoryPath, filePath);
-      const fileStat = await plugins.smartfile.fs.stat(absolutePath);
+      const fileStat = await plugins.fsPromises.stat(absolutePath);
      await this.addFileToPack(pack, {
        byteLength: fileStat.size,
        filePath: absolutePath,
        fileName: filePath,
-        content: plugins.smartfile.fsStream.createReadStream(absolutePath),
+        content: plugins.fs.createReadStream(absolutePath),
      });
    }
+
    return pack;
  }

-  public async getPackStream() {
-    const pack = plugins.tarStream.pack();
-    return pack;
+  /**
+   * Get a new TAR pack stream
+   */
+  public async getPackStream(): Promise<plugins.tarStream.Pack> {
+    return plugins.tarStream.pack();
  }

-  // extracting
-  getDecompressionStream() {
+  /**
+   * Get a TAR extraction stream
+   */
+  public getDecompressionStream(): plugins.tarStream.Extract {
    return plugins.tarStream.extract();
  }
+
+  /**
+   * Pack files into a TAR buffer
+   */
+  public async packFiles(files: IArchiveEntry[]): Promise<Buffer> {
+    const pack = await this.getPackStream();
+
+    for (const file of files) {
+      await this.addFileToPack(pack, {
+        fileName: file.archivePath,
+        content: file.content as string | Buffer | plugins.stream.Readable | plugins.smartfile.SmartFile | plugins.smartfile.StreamFile,
+        byteLength: file.size,
+      });
+    }
+
+    pack.finalize();
+
+    const chunks: Buffer[] = [];
+    return new Promise((resolve, reject) => {
+      pack.on('data', (chunk: Buffer) => chunks.push(chunk));
+      pack.on('end', () => resolve(Buffer.concat(chunks)));
+      pack.on('error', reject);
+    });
+  }
+
+  /**
+   * Pack a directory into a TAR.GZ buffer
+   */
+  public async packDirectoryToTarGz(
+    directoryPath: string,
+    compressionLevel?: TCompressionLevel
+  ): Promise<Buffer> {
+    const pack = await this.packDirectory(directoryPath);
+    pack.finalize();
+
+    const gzipTools = new GzipTools();
+    const gzipStream = gzipTools.getCompressionStream(compressionLevel);
+
+    const chunks: Buffer[] = [];
+    return new Promise((resolve, reject) => {
+      pack
+        .pipe(gzipStream)
+        .on('data', (chunk: Buffer) => chunks.push(chunk))
+        .on('end', () => resolve(Buffer.concat(chunks)))
+        .on('error', reject);
+    });
+  }
+
+  /**
+   * Pack a directory into a TAR.GZ stream
+   */
+  public async packDirectoryToTarGzStream(
+    directoryPath: string,
+    compressionLevel?: TCompressionLevel
+  ): Promise<plugins.stream.Readable> {
+    const pack = await this.packDirectory(directoryPath);
+    pack.finalize();
+
+    const gzipTools = new GzipTools();
+    const gzipStream = gzipTools.getCompressionStream(compressionLevel);
+
+    return pack.pipe(gzipStream);
+  }
+
+  /**
+   * Pack files into a TAR.GZ buffer
+   */
+  public async packFilesToTarGz(
+    files: IArchiveEntry[],
+    compressionLevel?: TCompressionLevel
+  ): Promise<Buffer> {
+    const tarBuffer = await this.packFiles(files);
+    const gzipTools = new GzipTools();
+    return gzipTools.compress(tarBuffer, compressionLevel);
+  }
 }
--- a/ts/classes.ziptools.ts
+++ b/ts/classes.ziptools.ts
@@ -1,83 +1,196 @@
-import type { SmartArchive } from './classes.smartarchive.js';
 import * as plugins from './plugins.js';
+import type { IArchiveEntry, TCompressionLevel } from './interfaces.js';

-class DecompressZipTransform extends plugins.smartstream
-  .SmartDuplex<ArrayBufferLike> {
-  private streamtools: plugins.smartstream.IStreamTools;
+/**
+ * Transform stream for ZIP decompression using fflate
+ * Emits StreamFile objects for each file in the archive
+ */
+export class ZipDecompressionTransform extends plugins.smartstream.SmartDuplex<Buffer, plugins.smartfile.StreamFile> {
+  private streamtools!: plugins.smartstream.IStreamTools;
  private unzipper = new plugins.fflate.Unzip(async (fileArg) => {
    let resultBuffer: Buffer;
-    fileArg.ondata = async (flateError, dat, final) => {
+    fileArg.ondata = async (_flateError, dat, final) => {
      resultBuffer
        ? (resultBuffer = Buffer.concat([resultBuffer, Buffer.from(dat)]))
        : (resultBuffer = Buffer.from(dat));
      if (final) {
-        const streamFile =
-          plugins.smartfile.StreamFile.fromBuffer(resultBuffer);
+        const streamFile = plugins.smartfile.StreamFile.fromBuffer(resultBuffer);
        streamFile.relativeFilePath = fileArg.name;
        this.streamtools.push(streamFile);
      }
    };
    fileArg.start();
  });
+
  constructor() {
    super({
      objectMode: true,
      writeFunction: async (chunkArg, streamtoolsArg) => {
        this.streamtools ? null : (this.streamtools = streamtoolsArg);
        this.unzipper.push(
-          Buffer.isBuffer(chunkArg) ? chunkArg : Buffer.from(chunkArg),
-          false,
+          Buffer.isBuffer(chunkArg) ? chunkArg : Buffer.from(chunkArg as unknown as ArrayBuffer),
+          false
        );
+        return null;
      },
      finalFunction: async () => {
        this.unzipper.push(Buffer.from(''), true);
        await plugins.smartdelay.delayFor(0);
        await this.streamtools.push(null);
+        return null;
      },
    });
    this.unzipper.register(plugins.fflate.UnzipInflate);
  }
 }

-// This class wraps fflate's zip in a Node.js Transform stream for compression
-export class CompressZipTransform extends plugins.stream.Transform {
-  files: { [fileName: string]: Uint8Array };
+/**
+ * Streaming ZIP compression using fflate
+ * Allows adding multiple entries before finalizing
+ */
+export class ZipCompressionStream extends plugins.stream.Duplex {
+  private files: Map<string, { data: Uint8Array; options?: plugins.fflate.ZipOptions }> = new Map();
+  private finalized = false;

  constructor() {
    super();
-    this.files = {};
  }

-  _transform(
-    chunk: Buffer,
-    encoding: BufferEncoding,
-    callback: plugins.stream.TransformCallback,
-  ) {
-    // Simple example: storing chunks in memory before finalizing ZIP in _flush
-    this.files['file.txt'] = new Uint8Array(chunk);
-    callback();
-  }
+  /**
+   * Add a file entry to the ZIP archive
+   */
+  public async addEntry(
+    fileName: string,
+    content: Buffer | plugins.stream.Readable,
+    options?: { compressionLevel?: TCompressionLevel }
+  ): Promise<void> {
+    if (this.finalized) {
+      throw new Error('Cannot add entries to a finalized ZIP archive');
+    }

-  _flush(callback: plugins.stream.TransformCallback) {
-    plugins.fflate.zip(this.files, (err, zipped) => {
-      if (err) {
-        callback(err);
-      } else {
-        this.push(Buffer.from(zipped));
-        callback();
+    let data: Buffer;
+    if (Buffer.isBuffer(content)) {
+      data = content;
+    } else {
+      // Collect stream to buffer
+      const chunks: Buffer[] = [];
+      for await (const chunk of content) {
+        chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
      }
+      data = Buffer.concat(chunks);
+    }
+
+    this.files.set(fileName, {
+      data: new Uint8Array(data),
+      options: options?.compressionLevel !== undefined ? { level: options.compressionLevel } : undefined,
    });
  }
+
+  /**
+   * Finalize the ZIP archive and emit the compressed data
+   */
+  public async finalize(): Promise<void> {
+    if (this.finalized) {
+      return;
+    }
+    this.finalized = true;
+
+    const filesObj: plugins.fflate.Zippable = {};
+    for (const [name, { data, options }] of this.files) {
+      filesObj[name] = options ? [data, options] : data;
+    }
+
+    // Use sync version for Deno compatibility (fflate async uses Web Workers)
+    try {
+      const result = plugins.fflate.zipSync(filesObj);
+      this.push(Buffer.from(result));
+      this.push(null);
+    } catch (err) {
+      throw err;
+    }
+  }
+
+  _read(): void {
+    // No-op: data is pushed when finalize() is called
+  }
+
+  _write(
+    _chunk: Buffer,
+    _encoding: BufferEncoding,
+    callback: (error?: Error | null) => void
+  ): void {
+    // Not used for ZIP creation - use addEntry() instead
+    callback(new Error('Use addEntry() to add files to the ZIP archive'));
+  }
 }

+/**
+ * ZIP compression and decompression utilities
+ */
 export class ZipTools {
-  constructor() {}
-
-  public getCompressionStream() {
-    return new CompressZipTransform();
+  /**
+   * Get a streaming compression object for creating ZIP archives
+   */
+  public getCompressionStream(): ZipCompressionStream {
+    return new ZipCompressionStream();
  }

-  public getDecompressionStream() {
-    return new DecompressZipTransform();
+  /**
+   * Get a streaming decompression transform for extracting ZIP archives
+   */
+  public getDecompressionStream(): ZipDecompressionTransform {
+    return new ZipDecompressionTransform();
+  }
+
+  /**
+   * Create a ZIP archive from an array of entries
+   */
+  public async createZip(entries: IArchiveEntry[], compressionLevel?: TCompressionLevel): Promise<Buffer> {
+    const filesObj: plugins.fflate.Zippable = {};
+
+    for (const entry of entries) {
+      let data: Uint8Array;
+
+      if (typeof entry.content === 'string') {
+        data = new TextEncoder().encode(entry.content);
+      } else if (Buffer.isBuffer(entry.content)) {
+        data = new Uint8Array(entry.content);
+      } else if (entry.content instanceof plugins.smartfile.SmartFile) {
+        data = new Uint8Array(entry.content.contents);
+      } else if (entry.content instanceof plugins.smartfile.StreamFile) {
+        const buffer = await entry.content.getContentAsBuffer();
+        data = new Uint8Array(buffer);
+      } else {
+        // Readable stream
+        const chunks: Buffer[] = [];
+        for await (const chunk of entry.content as plugins.stream.Readable) {
+          chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
+        }
+        data = new Uint8Array(Buffer.concat(chunks));
+      }
+
+      if (compressionLevel !== undefined) {
+        filesObj[entry.archivePath] = [data, { level: compressionLevel }];
+      } else {
+        filesObj[entry.archivePath] = data;
+      }
+    }
+
+    // Use sync version for Deno compatibility (fflate async uses Web Workers)
+    const result = plugins.fflate.zipSync(filesObj);
+    return Buffer.from(result);
+  }
+
+  /**
+   * Extract a ZIP buffer to an array of entries
+   */
+  public async extractZip(data: Buffer): Promise<Array<{ path: string; content: Buffer }>> {
+    // Use sync version for Deno compatibility (fflate async uses Web Workers)
+    const result = plugins.fflate.unzipSync(data);
+    const entries: Array<{ path: string; content: Buffer }> = [];
+    for (const [path, content] of Object.entries(result)) {
+      entries.push({ path, content: Buffer.from(content) });
+    }
+    return entries;
  }
 }
--- a/ts/errors.ts
+++ b/ts/errors.ts
@@ -0,0 +1,70 @@
+/**
+ * Base error class for smartarchive
+ */
+export class SmartArchiveError extends Error {
+  public readonly code: string;
+
+  constructor(message: string, code: string) {
+    super(message);
+    this.name = 'SmartArchiveError';
+    this.code = code;
+    // Maintains proper stack trace for where error was thrown (V8)
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, this.constructor);
+    }
+  }
+}
+
+/**
+ * BZIP2-specific decompression errors
+ */
+export class Bzip2Error extends SmartArchiveError {
+  constructor(message: string, code: string = 'BZIP2_ERROR') {
+    super(message, code);
+    this.name = 'Bzip2Error';
+  }
+}
+
+/**
+ * Archive format detection errors
+ */
+export class ArchiveFormatError extends SmartArchiveError {
+  constructor(message: string) {
+    super(message, 'ARCHIVE_FORMAT_ERROR');
+    this.name = 'ArchiveFormatError';
+  }
+}
+
+/**
+ * Stream processing errors
+ */
+export class StreamError extends SmartArchiveError {
+  constructor(message: string) {
+    super(message, 'STREAM_ERROR');
+    this.name = 'StreamError';
+  }
+}
+
+/**
+ * BZIP2 error codes for programmatic error handling
+ */
+export const BZIP2_ERROR_CODES = {
+  NO_MAGIC_NUMBER: 'BZIP2_NO_MAGIC',
+  INVALID_ARCHIVE: 'BZIP2_INVALID_ARCHIVE',
+  CRC_MISMATCH: 'BZIP2_CRC_MISMATCH',
+  INVALID_BLOCK_DATA: 'BZIP2_INVALID_BLOCK',
+  BUFFER_OVERFLOW: 'BZIP2_BUFFER_OVERFLOW',
+  INVALID_HUFFMAN: 'BZIP2_INVALID_HUFFMAN',
+  INVALID_SELECTOR: 'BZIP2_INVALID_SELECTOR',
+  INVALID_POSITION: 'BZIP2_INVALID_POSITION',
+  PREMATURE_END: 'BZIP2_PREMATURE_END',
+} as const;
+
+export type TBzip2ErrorCode = typeof BZIP2_ERROR_CODES[keyof typeof BZIP2_ERROR_CODES];
+
+/**
+ * Throw a BZIP2 error with a specific code
+ */
+export function throwBzip2Error(message: string, code: TBzip2ErrorCode): never {
+  throw new Bzip2Error(message, code);
+}
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -1,4 +1,15 @@
+// Core types and errors
+export * from './interfaces.js';
+export * from './errors.js';
+
+// Main archive class
 export * from './classes.smartarchive.js';
+
+// Format-specific tools
 export * from './classes.tartools.js';
 export * from './classes.ziptools.js';
 export * from './classes.gziptools.js';
+export * from './classes.bzip2tools.js';
+
+// Archive analysis
+export * from './classes.archiveanalyzer.js';
--- a/ts/interfaces.ts
+++ b/ts/interfaces.ts
@@ -0,0 +1,136 @@
+import type * as stream from 'node:stream';
+import type { SmartFile, StreamFile } from '@push.rocks/smartfile';
+
+/**
+ * Supported archive formats
+ */
+export type TArchiveFormat = 'tar' | 'tar.gz' | 'tgz' | 'zip' | 'gz' | 'bz2';
+
+/**
+ * Compression level (0 = no compression, 9 = maximum compression)
+ */
+export type TCompressionLevel = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
+
+/**
+ * Supported MIME types for archive detection
+ */
+export type TSupportedMime =
+  | 'application/gzip'
+  | 'application/zip'
+  | 'application/x-bzip2'
+  | 'application/x-tar'
+  | undefined;
+
+/**
+ * Entry to add to an archive during creation
+ */
+export interface IArchiveEntry {
+  /** Path within the archive */
+  archivePath: string;
+  /** Content: string, Buffer, Readable stream, SmartFile, or StreamFile */
+  content: string | Buffer | stream.Readable | SmartFile | StreamFile;
+  /** Optional size hint for streams (improves performance) */
+  size?: number;
+  /** Optional file mode/permissions */
+  mode?: number;
+  /** Optional modification time */
+  mtime?: Date;
+}
+
+/**
+ * Options for creating archives
+ */
+export interface IArchiveCreationOptions {
+  /** Target archive format */
+  format: TArchiveFormat;
+  /** Compression level (0-9, default depends on format) */
+  compressionLevel?: TCompressionLevel;
+  /** Base path to strip from file paths in archive */
+  basePath?: string;
+}
+
+/**
+ * Options for extracting archives
+ */
+export interface IArchiveExtractionOptions {
+  /** Target directory for extraction */
+  targetDir: string;
+  /** Optional filename for single-file archives (gz, bz2) */
+  fileName?: string;
+  /** Number of leading path components to strip */
+  stripComponents?: number;
+  /** Filter function to select which entries to extract */
+  filter?: (entry: IArchiveEntryInfo) => boolean;
+  /** Whether to overwrite existing files */
+  overwrite?: boolean;
+}
+
+/**
+ * Information about an archive entry
+ */
+export interface IArchiveEntryInfo {
+  /** Path of the entry within the archive */
+  path: string;
+  /** Size in bytes */
+  size: number;
+  /** Whether this entry is a directory */
+  isDirectory: boolean;
+  /** Whether this entry is a file */
+  isFile: boolean;
+  /** Modification time */
+  mtime?: Date;
+  /** File mode/permissions */
+  mode?: number;
+}
+
+/**
+ * Result of archive analysis
+ */
+export interface IArchiveInfo {
+  /** Detected archive format */
+  format: TArchiveFormat | null;
+  /** Whether the archive is compressed */
+  isCompressed: boolean;
+  /** Whether this is a recognized archive format */
+  isArchive: boolean;
+  /** List of entries (if available without full extraction) */
+  entries?: IArchiveEntryInfo[];
+}
+
+/**
+ * Options for adding a file to a TAR pack stream
+ */
+export interface IAddFileOptions {
+  /** Filename within the archive */
+  fileName?: string;
+  /** File content */
+  content?: string | Buffer | stream.Readable | SmartFile | StreamFile;
+  /** Size in bytes (required for streams) */
+  byteLength?: number;
+  /** Path to file on disk (alternative to content) */
+  filePath?: string;
+}
+
+/**
+ * Bit reader interface for BZIP2 decompression
+ */
+export interface IBitReader {
+  (n: number | null): number | void;
+  bytesRead: number;
+}
+
+/**
+ * Huffman group for BZIP2 decompression
+ */
+export interface IHuffmanGroup {
+  permute: Int32Array;
+  limit: Int32Array;
+  base: Int32Array;
+  minLen: number;
+  maxLen: number;
+}
+
+/**
+ * Entry filter predicate for fluent API
+ */
+export type TEntryFilter = (entry: IArchiveEntryInfo) => boolean;
--- a/ts/plugins.ts
+++ b/ts/plugins.ts
@@ -1,8 +1,34 @@
 // node native scope
-import * as path from 'path';
-import * as stream from 'stream';
+import * as path from 'node:path';
+import * as stream from 'node:stream';
+import * as fs from 'node:fs';
+import * as fsPromises from 'node:fs/promises';

-export { path, stream };
+export { path, stream, fs, fsPromises };
+
+/**
+ * List files in a directory recursively, returning relative paths
+ */
+export async function listFileTree(dirPath: string, _pattern: string = '**/*'): Promise<string[]> {
+  const results: string[] = [];
+
+  async function walkDir(currentPath: string, relativePath: string = '') {
+    const entries = await fsPromises.readdir(currentPath, { withFileTypes: true });
+    for (const entry of entries) {
+      const entryRelPath = relativePath ? path.join(relativePath, entry.name) : entry.name;
+      const entryFullPath = path.join(currentPath, entry.name);
+
+      if (entry.isDirectory()) {
+        await walkDir(entryFullPath, entryRelPath);
+      } else if (entry.isFile()) {
+        results.push(entryRelPath);
+      }
+    }
+  }
+
+  await walkDir(dirPath);
+  return results;
+}

 // @pushrocks scope
 import * as smartfile from '@push.rocks/smartfile';
Author	SHA1	Message	Date
Juergen Kunz	4e3c5a8443	v5.0.1	2025-11-25 13:37:27 +00:00
Juergen Kunz	11bbddc763	fix(ziptools,gziptools): Use fflate synchronous APIs for ZIP and GZIP operations for Deno compatibility; add TEntryFilter type and small docs/tests cleanup	2025-11-25 13:37:27 +00:00
Juergen Kunz	5cc030d433	v5.0.0	2025-11-25 12:32:13 +00:00
Juergen Kunz	2b91c1586c	BREAKING CHANGE(SmartArchive): Refactor public API: rename factory/extraction methods, introduce typed interfaces and improved compression tools	2025-11-25 12:32:13 +00:00
Juergen Kunz	e609c023bc	v4.2.4	2025-11-25 11:59:11 +00:00
Juergen Kunz	634c204a00	fix(plugins): Migrate filesystem usage to Node fs/fsPromises and upgrade smartfile to v13; add listFileTree helper and update tests	2025-11-25 11:59:11 +00:00
Juergen Kunz	7ccd210c45	v4.2.3	2025-11-25 11:28:31 +00:00
Juergen Kunz	fe90de56d6	fix(build): Upgrade dev tooling: bump @git.zone/tsbuild, @git.zone/tsrun and @git.zone/tstest versions	2025-11-25 11:28:31 +00:00
Juergen Kunz	d9251fa1a5	4.2.2	2025-08-18 02:06:31 +00:00
Juergen Kunz	ec58b9cdc5	fix(smartarchive): Improve tar entry streaming handling and add in-memory gzip/tgz tests	2025-08-18 02:06:31 +00:00
Juergen Kunz	9dbb7d9731	4.2.1	2025-08-18 01:52:21 +00:00
Juergen Kunz	4428638170	fix(gzip): Improve gzip streaming decompression, archive analysis and unpacking; add gzip tests	2025-08-18 01:52:20 +00:00