commit d36eeec1dcee062faef77b323189c6e684fa33db
Author: Zhongwei Li <lizhongwei.nkcs@gmail.com>
Date:   Sat Nov 29 18:23:11 2025 +0800

    Initial commit

diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
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+++ b/.claude-plugin/plugin.json
@@ -0,0 +1,14 @@
+{
+  "name": "concat-glob-tool",
+  "description": "concat-glob-tool-plugin",
+  "version": "0.1.0",
+  "author": {
+    "name": "Dennis Vriend"
+  },
+  "skills": [
+    "./skills"
+  ],
+  "commands": [
+    "./commands"
+  ]
+}
\ No newline at end of file
diff --git a/README.md b/README.md
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+++ b/README.md
@@ -0,0 +1,3 @@
+# concat-glob-tool
+
+concat-glob-tool-plugin
diff --git a/commands/concat.md b/commands/concat.md
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--- /dev/null
+++ b/commands/concat.md
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+---
+description: Concatenate files matching glob patterns
+argument-hint: patterns
+---
+
+Concatenate files matching PATTERNS to output file with separators.
+
+## Usage
+
+```bash
+concat-glob-tool PATTERNS... --output-file FILE [OPTIONS]
+```
+
+## Arguments
+
+- `PATTERNS...`: Glob patterns (e.g., `*.py`, `src/**/*.md`)
+- `-o, --output-file FILE`: Output file path (required)
+- `--separator TEXT`: Separator text (default: `---`)
+- `-n, --dry-run`: Preview (default, enabled)
+- `--no-dry-run`: Execute concatenation
+- `-f, --force`: Overwrite existing file
+- `-v/-vv/-vvv`: Verbosity (INFO/DEBUG/TRACE)
+
+## Examples
+
+```bash
+# Preview concatenation (dry-run)
+concat-glob-tool '*.py' -o output.txt
+
+# Execute concatenation
+concat-glob-tool '*.py' '*.md' -o output.txt --no-dry-run
+
+# Custom separator
+concat-glob-tool '*.py' -o output.txt --separator '===' --no-dry-run
+```
+
+## Output
+
+Files concatenated with format: `\n---\n# FILENAME\n---\n`
diff --git a/commands/help.md b/commands/help.md
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+---
+description: Show help and examples
+argument-hint: --help
+---
+
+Display help information with examples.
+
+## Usage
+
+```bash
+concat-glob-tool --help
+concat-glob-tool --version
+```
+
+## Examples
+
+```bash
+# Show full help
+concat-glob-tool --help
+
+# Show version
+concat-glob-tool --version
+
+# Verbose help with examples
+concat-glob-tool --help | less
+```
+
+## Output
+
+Comprehensive help with:
+- Command syntax
+- All options and flags
+- Working examples
+- Output format description
diff --git a/commands/stdin.md b/commands/stdin.md
new file mode 100644
index 0000000..a96630b
--- /dev/null
+++ b/commands/stdin.md
@@ -0,0 +1,37 @@
+---
+description: Concatenate files from stdin input
+argument-hint: --stdin
+---
+
+Read file paths from stdin and concatenate them.
+
+## Usage
+
+```bash
+find ... | concat-glob-tool --stdin --output-file FILE [OPTIONS]
+```
+
+## Arguments
+
+- `-s, --stdin`: Read paths from stdin (required)
+- `-o, --output-file FILE`: Output file path (required)
+- `--separator TEXT`: Separator text (default: `---`)
+- `--no-dry-run`: Execute concatenation
+- `-f, --force`: Overwrite existing file
+
+## Examples
+
+```bash
+# From find command
+find . -name '*.py' | concat-glob-tool --stdin -o output.txt --no-dry-run
+
+# From fd command
+fd -e py | concat-glob-tool --stdin -o output.txt --no-dry-run
+
+# Filtered with grep
+find . -name '*.py' | grep -v test | concat-glob-tool --stdin -o output.txt --no-dry-run
+```
+
+## Output
+
+Files concatenated with separators including filenames.
diff --git a/plugin.lock.json b/plugin.lock.json
new file mode 100644
index 0000000..d3dd20d
--- /dev/null
+++ b/plugin.lock.json
@@ -0,0 +1,57 @@
+{
+  "$schema": "internal://schemas/plugin.lock.v1.json",
+  "pluginId": "gh:dnvriend/concat-glob-tool:plugins/concat-glob-tool",
+  "normalized": {
+    "repo": null,
+    "ref": "refs/tags/v20251128.0",
+    "commit": "c58f0ec353802d360ccff821e6910d800a509458",
+    "treeHash": "ecf6c6f8c6c3ba660bfc7be43403235996bf24b8d4b625f9d07e47673a07079e",
+    "generatedAt": "2025-11-28T10:16:34.790356Z",
+    "toolVersion": "publish_plugins.py@0.2.0"
+  },
+  "origin": {
+    "remote": "git@github.com:zhongweili/42plugin-data.git",
+    "branch": "master",
+    "commit": "aa1497ed0949fd50e99e70d6324a29c5b34f9390",
+    "repoRoot": "/Users/zhongweili/projects/openmind/42plugin-data"
+  },
+  "manifest": {
+    "name": "concat-glob-tool",
+    "description": "concat-glob-tool-plugin",
+    "version": "0.1.0"
+  },
+  "content": {
+    "files": [
+      {
+        "path": "README.md",
+        "sha256": "05ce2d28a144fe8e8eb8a84dba06e5bf8d49d3ee532eb39f4c6133fde0993cf6"
+      },
+      {
+        "path": ".claude-plugin/plugin.json",
+        "sha256": "7d4b0b56568faf7a03e5bc43489014b2ecb407bae67962218b8fdcc3f5ffd795"
+      },
+      {
+        "path": "commands/stdin.md",
+        "sha256": "9ffb3dc65e625be23e6b9043217d0a8e44ee22e5461fe7ed17c1266103023e5c"
+      },
+      {
+        "path": "commands/help.md",
+        "sha256": "ae52d284cbb7ffbd42ae91e60fe53e7d3d6a7b65a0c361f757779a3c2fcf4106"
+      },
+      {
+        "path": "commands/concat.md",
+        "sha256": "c3515b7e69b40e0d273ba4a4de2b0a159f65e77c9c7039179926c4ebd6e4116f"
+      },
+      {
+        "path": "skills/concat-glob-tool/SKILL.md",
+        "sha256": "c9f75834f045e4c84ab09af8a3a597aca9119b478d55775fe7472bbcb4362977"
+      }
+    ],
+    "dirSha256": "ecf6c6f8c6c3ba660bfc7be43403235996bf24b8d4b625f9d07e47673a07079e"
+  },
+  "security": {
+    "scannedAt": null,
+    "scannerVersion": null,
+    "flags": []
+  }
+}
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diff --git a/skills/concat-glob-tool/SKILL.md b/skills/concat-glob-tool/SKILL.md
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+---
+name: skill-concat-glob-tool
+description: File concatenation with glob patterns guide
+---
+
+# When to use
+- Need to concatenate multiple files matching patterns
+- Creating LLM context files from source code
+- Merging documentation or configuration files
+- Building single-file distributions
+
+# concat-glob-tool Skill
+
+## Purpose
+
+Master file concatenation with glob patterns for efficient file merging, documentation bundling, and LLM context generation. This skill covers CLI usage, library integration, and advanced patterns.
+
+## When to Use This Skill
+
+**Use this skill when:**
+- Concatenating files matching glob patterns (*.py, src/**/*.md)
+- Creating context files for Large Language Models
+- Merging multiple source files for documentation
+- Building single-file distributions with separators
+- Integrating file concatenation into Python scripts
+
+**Do NOT use this skill for:**
+- Single file operations (use `cat` or `cp`)
+- Binary file concatenation (use specialized tools)
+- Real-time streaming (this is batch processing)
+
+## CLI Tool: concat-glob-tool
+
+A production-ready CLI utility that concatenates files matching glob patterns with intelligent separators. Features dry-run mode, stdin support, and both CLI and library modes.
+
+### Installation
+
+```bash
+# From source
+git clone https://github.com/dnvriend/concat-glob-tool.git
+cd concat-glob-tool
+uv tool install .
+
+# Verify
+concat-glob-tool --version
+```
+
+### Prerequisites
+
+- Python 3.14+
+- uv package manager
+- Access to file system
+
+### Quick Start
+
+```bash
+# Preview (dry-run, default)
+concat-glob-tool '*.py' -o output.txt
+
+# Execute
+concat-glob-tool '*.py' '*.md' -o output.txt --no-dry-run
+
+# Stdin mode
+find . -name '*.py' | concat-glob-tool --stdin -o output.txt --no-dry-run
+```
+
+## Progressive Disclosure
+
+<details>
+<summary><strong>📖 Core Commands (Click to expand)</strong></summary>
+
+### concat - Concatenate Files with Glob Patterns
+
+Concatenate files matching glob patterns to a single output file with intelligent separators.
+
+**Usage:**
+```bash
+concat-glob-tool PATTERNS... --output-file FILE [OPTIONS]
+```
+
+**Arguments:**
+- `PATTERNS...`: One or more glob patterns (e.g., `*.py`, `src/**/*.md`)
+- `-o, --output-file FILE`: Output file path (required)
+- `--separator TEXT`: Separator text between files (default: `---`)
+- `-n, --dry-run`: Preview without writing (enabled by default)
+- `--no-dry-run`: Actually execute the concatenation
+- `-f, --force`: Overwrite existing output file
+- `-v, --verbose`: Enable verbose output (repeatable: -v, -vv, -vvv)
+- `--version`: Show version
+- `--help`: Show help message with examples
+
+**Examples:**
+```bash
+# Basic concatenation - preview mode (dry-run)
+concat-glob-tool '*.py' -o output.txt
+
+# Execute concatenation
+concat-glob-tool '*.py' -o output.txt --no-dry-run
+
+# Multiple patterns
+concat-glob-tool '*.py' '*.md' '*.txt' -o combined.txt --no-dry-run
+
+# Recursive patterns
+concat-glob-tool 'src/**/*.py' -o all-code.txt --no-dry-run
+
+# Multiple recursive patterns
+concat-glob-tool 'src/**/*.py' 'tests/**/*.py' -o codebase.txt --no-dry-run
+
+# Custom separator
+concat-glob-tool '*.py' -o output.txt --separator '===' --no-dry-run
+
+# Force overwrite existing file
+concat-glob-tool '*.py' -o existing.txt --force --no-dry-run
+
+# Verbose output
+concat-glob-tool '*.py' -o output.txt -vv --no-dry-run
+
+# LLM context generation
+concat-glob-tool 'src/**/*.py' 'tests/**/*.py' '*.md' \
+    -o llm-context.txt \
+    --separator '---' \
+    --no-dry-run
+```
+
+**Output Format:**
+Files are concatenated with this separator format between each file:
+```
+---
+# /path/to/file.py
+---
+[file contents]
+```
+
+The separator includes:
+- Blank line before separator
+- Separator line (configurable, default: `---`)
+- Comment line with full file path
+- Separator line  
+- Blank line before file contents
+
+**Dry-Run Mode (Default):**
+By default, the tool runs in preview mode showing:
+- Number of files that would be concatenated
+- List of files to process
+- Separator format
+- Reminder to use `--no-dry-run` to execute
+
+This prevents accidental overwrites and lets you verify operations first.
+
+---
+
+### stdin - Concatenate from Stdin
+
+Read file paths from stdin and concatenate them. Useful for integration with `find`, `fd`, `grep`, and other tools.
+
+**Usage:**
+```bash
+find ... | concat-glob-tool --stdin --output-file FILE [OPTIONS]
+```
+
+**Arguments:**
+- `-s, --stdin`: Read file paths from stdin (one per line)
+- `-o, --output-file FILE`: Output file path (required)
+- `--separator TEXT`: Separator text (default: `---`)
+- `--no-dry-run`: Execute the concatenation
+- `-f, --force`: Overwrite existing output file
+- `-v, --verbose`: Verbose output
+
+**Examples:**
+```bash
+# From find command
+find . -name '*.py' -type f | concat-glob-tool --stdin -o output.txt --no-dry-run
+
+# From fd (faster find alternative)
+fd -e py | concat-glob-tool --stdin -o output.txt --no-dry-run
+
+# Filter with grep
+find . -name '*.py' | grep -v test | concat-glob-tool --stdin -o output.txt --no-dry-run
+
+# Complex pipeline
+find . -name '*.py' -type f | \
+    grep -v __pycache__ | \
+    grep -v .venv | \
+    concat-glob-tool --stdin -o filtered.txt --no-dry-run
+
+# With custom separator
+find . -name '*.md' | concat-glob-tool --stdin -o docs.txt --separator '===' --no-dry-run
+```
+
+**Note:**
+- Cannot use both `--stdin` and glob patterns in the same command
+- Each line from stdin should be a valid file path
+- Invalid paths will cause clear error messages with solutions
+
+</details>
+
+<details>
+<summary><strong>⚙️ Advanced Features (Click to expand)</strong></summary>
+
+### Environment Variable Expansion
+
+Glob patterns support environment variable expansion and home directory shortcuts.
+
+**Examples:**
+```bash
+# Home directory expansion
+concat-glob-tool '~/projects/*.py' -o output.txt --no-dry-run
+
+# Environment variables
+concat-glob-tool '$HOME/src/**/*.py' -o output.txt --no-dry-run
+
+# Mixed
+concat-glob-tool '~/.config/*.conf' '$PROJECT_DIR/**/*.md' -o output.txt --no-dry-run
+```
+
+---
+
+### Library Integration
+
+Use concat-glob-tool as a Python library for programmatic integration.
+
+**Installation:**
+```bash
+pip install concat-glob-tool
+# or
+uv add concat-glob-tool
+```
+
+**Core API:**
+```python
+from concat_glob_tool import (
+    expand_glob_patterns,
+    concatenate_files,
+    format_separator,
+    ConcatError,
+    NoMatchesError,
+    OutputExistsError,
+)
+from pathlib import Path
+
+# Expand glob patterns
+files = expand_glob_patterns(["*.py", "src/**/*.md"])
+print(f"Found {len(files)} files")
+
+# Concatenate files
+result = concatenate_files(
+    files=files,
+    output_file=Path("output.txt"),
+    separator="---",
+    force=False,
+    dry_run=False,
+)
+
+print(f"Concatenated {result['files_count']} files")
+print(f"Wrote {result['bytes_written']} bytes to {result['output_file']}")
+```
+
+**Exception Handling:**
+```python
+from pathlib import Path
+from concat_glob_tool import (
+    concatenate_files,
+    expand_glob_patterns,
+    NoMatchesError,
+    OutputExistsError,
+    ConcatError,
+)
+
+try:
+    files = expand_glob_patterns(["*.py"])
+    result = concatenate_files(
+        files=files,
+        output_file=Path("output.txt"),
+        force=False,
+        dry_run=False,
+    )
+    print(f"Success: {result}")
+
+except NoMatchesError as e:
+    print(f"No files found: {e}")
+except OutputExistsError as e:
+    print(f"Output exists: {e}")
+except ConcatError as e:
+    print(f"Error: {e}")
+```
+
+**Integration Example:**
+```python
+#!/usr/bin/env python3
+"""Example: Concatenate Python files with custom logic."""
+
+from pathlib import Path
+from concat_glob_tool import expand_glob_patterns, concatenate_files
+
+def main():
+    # Find all Python files
+    files = expand_glob_patterns(["src/**/*.py", "tests/**/*.py"])
+    
+    # Filter files (e.g., exclude __init__.py)
+    filtered_files = [f for f in files if f.name != "__init__.py"]
+    
+    # Concatenate
+    result = concatenate_files(
+        files=filtered_files,
+        output_file=Path("codebase.txt"),
+        separator="===",
+        force=True,
+        dry_run=False,
+    )
+    
+    print(f"✅ Concatenated {result['files_count']} files")
+    print(f"📝 Output: {result['output_file']}")
+    print(f"💾 Size: {result['bytes_written']} bytes")
+
+if __name__ == "__main__":
+    main()
+```
+
+---
+
+### Custom Separators
+
+Customize the separator text while maintaining the format structure.
+
+**Examples:**
+```bash
+# Simple separator
+concat-glob-tool '*.py' -o output.txt --separator '---' --no-dry-run
+
+# Equals signs
+concat-glob-tool '*.py' -o output.txt --separator '===' --no-dry-run
+
+# Hash separator
+concat-glob-tool '*.py' -o output.txt --separator '###' --no-dry-run
+
+# Custom text
+concat-glob-tool '*.py' -o output.txt --separator 'FILE' --no-dry-run
+```
+
+**Separator Format:**
+The separator structure is always: `\n{separator}\n# {filename}\n{separator}\n`
+
+Example with `--separator '==='`:
+```
+===
+# /path/to/file.py
+===
+[file contents]
+```
+
+</details>
+
+<details>
+<summary><strong>🔧 Troubleshooting (Click to expand)</strong></summary>
+
+### Common Issues
+
+**Issue: No files matched the patterns**
+```bash
+$ concat-glob-tool '*.nonexistent' -o out.txt --no-dry-run
+Error: No files matched the patterns: *.nonexistent
+
+Solution: Verify glob patterns are correct. Examples:
+  - '*.py' for Python files in current directory
+  - '**/*.py' for Python files recursively
+  - 'src/**/*.{py,md}' for multiple extensions
+```
+
+**Solution:**
+- Check glob pattern syntax
+- Verify files exist in specified locations
+- Use `--verbose` to see detailed logging
+- Test pattern with `ls` first: `ls *.py`
+
+---
+
+**Issue: Output file already exists**
+```bash
+$ concat-glob-tool '*.py' -o existing.txt --no-dry-run
+Error: Output file already exists: existing.txt
+
+Solution: Use --force to overwrite or choose a different output file.
+```
+
+**Solution:**
+- Use `--force` flag to overwrite: `concat-glob-tool '*.py' -o existing.txt --force --no-dry-run`
+- Choose different output filename
+- Remove existing file first
+
+---
+
+**Issue: Cannot use both --stdin and glob patterns**
+```bash
+$ concat-glob-tool '*.py' --stdin -o out.txt
+Error: Cannot use both --stdin and glob patterns.
+
+Solution: Use either --stdin OR provide glob patterns, not both.
+```
+
+**Solution:**
+- Use glob patterns: `concat-glob-tool '*.py' -o out.txt --no-dry-run`
+- OR use stdin: `find . -name '*.py' | concat-glob-tool --stdin -o out.txt --no-dry-run`
+
+---
+
+**Issue: Forgot --no-dry-run flag**
+```bash
+$ concat-glob-tool '*.py' -o output.txt
+[DRY-RUN] Would concatenate 10 files to: output.txt
+...
+To execute, add --no-dry-run flag.
+```
+
+**Solution:**
+- This is expected behavior (dry-run is default)
+- Add `--no-dry-run` to actually execute
+- Dry-run mode prevents accidental overwrites
+
+### Getting Help
+
+```bash
+# Full help with examples
+concat-glob-tool --help
+
+# Version information
+concat-glob-tool --version
+
+# Verbose output for debugging
+concat-glob-tool '*.py' -o output.txt -vv --no-dry-run
+```
+
+### Verbose Logging Levels
+
+- No flag (default): WARNING only
+- `-v`: INFO level (operations and progress)
+- `-vv`: DEBUG level (detailed information)
+- `-vvv`: TRACE level (library internals)
+
+All logs go to stderr, keeping stdout clean for piping.
+
+</details>
+
+## Exit Codes
+
+- `0`: Success
+- `1`: Error (NoMatchesError, OutputExistsError, ConcatError, validation errors)
+
+## Output Formats
+
+**Separator Format:**
+```
+\n---\n# /path/to/filename\n---\n
+```
+
+Components:
+- Blank line before separator
+- Separator line (customizable via `--separator`)
+- Comment line with full file path
+- Separator line
+- Blank line before file contents
+
+**Dry-Run Output:**
+- Number of files to concatenate
+- List of file paths
+- Separator format preview
+- Instructions to execute
+
+**Execution Output:**
+```
+Successfully concatenated 10 files to output.txt (52482 bytes)
+```
+
+## Best Practices
+
+1. **Always Preview First**: Use default dry-run mode to verify operations before executing with `--no-dry-run`
+
+2. **Use Descriptive Output Names**: Name output files clearly indicating contents (e.g., `llm-context.txt`, `all-python-code.txt`)
+
+3. **Leverage Verbose Mode**: Use `-v` or `-vv` when troubleshooting or learning the tool's behavior
+
+4. **Quote Glob Patterns**: Always quote patterns in shell to prevent premature expansion: `'*.py'` not `*.py`
+
+5. **Test Patterns with ls**: Verify glob patterns work with `ls` before using in concat-glob-tool
+
+6. **Use stdin for Complex Filtering**: Combine with `find`, `fd`, `grep` for advanced file selection
+
+7. **Custom Separators for Context**: Use meaningful separators when creating context files for specific purposes
+
+## Resources
+
+- **GitHub**: https://github.com/dnvriend/concat-glob-tool
+- **Documentation**: README.md in repository
+- **Python Package**: Available via pip/uv
+- **License**: MIT