DocSync — Living Documentation for Your Codebase

DocSync generates documentation from your code and keeps it in sync automatically. It uses tree-sitter for multi-language AST parsing, lefthook for git hook integration, and difftastic for semantic change detection.

Commands

Free Tier (No license required)

docsync generate <file-or-directory>

Generate a one-shot README or API doc for a single file or directory.

How to execute:

bash "<SKILL_DIR>/scripts/docsync.sh" generate <target>

What it does:

1. Parses the target file(s) with tree-sitter to extract symbols (functions, classes, exports, types, interfaces)
2. Applies the appropriate template from <SKILL_DIR>/templates/
3. Generates a markdown documentation file alongside the source

Example usage scenarios:

• "Generate docs for src/utils/auth.ts" → runs docsync generate src/utils/auth.ts
• "Document this whole directory" → runs docsync generate src/api/
• "Create a README for this project" → runs docsync generate .

Pro Tier ($29/user/month — requires DOCSYNC_LICENSE_KEY)

docsync drift [directory]

Scan for documentation drift — find where code has changed but docs haven't been updated.

How to execute:

bash "<SKILL_DIR>/scripts/docsync.sh" drift [directory]

What it does:

1. Validates license key from config
2. Parses all source files with tree-sitter
3. Compares extracted symbols against existing documentation
4. Reports: new undocumented symbols, changed signatures with stale docs, deleted symbols still in docs
5. Outputs a drift report with severity levels (critical/warning/info)

docsync hooks install

Install git hooks that automatically check for doc drift on every commit.

How to execute:

bash "<SKILL_DIR>/scripts/docsync.sh" hooks install

What it does:

1. Validates Pro+ license
2. Copies lefthook config to project root
3. Installs lefthook pre-commit hook
4. On every commit: analyzes staged files, blocks commit if critical drift detected, offers auto-regen

docsync hooks uninstall

Remove DocSync git hooks.

bash "<SKILL_DIR>/scripts/docsync.sh" hooks uninstall

docsync auto-fix [directory]

Auto-regenerate stale documentation for files with detected drift.

bash "<SKILL_DIR>/scripts/docsync.sh" auto-fix [directory]

Team Tier ($49/user/month — requires DOCSYNC_LICENSE_KEY with team tier)

docsync onboarding [directory]

Generate a comprehensive onboarding guide for new developers.

bash "<SKILL_DIR>/scripts/docsync.sh" onboarding [directory]

docsync architecture [directory]

Generate architecture documentation showing module relationships and data flow.

bash "<SKILL_DIR>/scripts/docsync.sh" architecture [directory]

Supported Languages

DocSync uses tree-sitter grammars and supports:

• JavaScript / TypeScript (including JSX/TSX)
• Python
• Rust
• Go
• Java
• C / C++
• Ruby
• PHP
• C#
• Swift
• Kotlin

Configuration

Users can configure DocSync in ~/.openclaw/openclaw.json:

{
  "skills": {
    "entries": {
      "docsync": {
        "enabled": true,
        "apiKey": "YOUR_LICENSE_KEY_HERE",
        "config": {
          "outputDir": "docs",
          "templateOverrides": {},
          "excludePatterns": ["**/node_modules/**", "**/dist/**", "**/.git/**"],
          "languages": ["typescript", "python", "go"],
          "driftThreshold": "warning",
          "autoFix": false
        }
      }
    }
  }
}

Important Notes

• Free tier works immediately with no configuration
• Pro/Team tiers require a license key from https://docsync.pages.dev
• All processing happens locally — no code is sent to external servers
• License validation is offline — no network calls needed
• Git hooks use lefthook which must be installed (see install metadata above)
• tree-sitter and difftastic are optional but recommended for best results; the skill falls back to regex-based parsing if unavailable

Error Handling

• If tree-sitter is not installed, fall back to regex-based symbol extraction (less accurate but functional)
• If lefthook is not installed and user tries hooks install, prompt to install it
• If license key is invalid or expired, show clear message with link to https://docsync.pages.dev/renew
• If a language grammar is not available, skip that file with a warning

When to Use DocSync

The user might say things like:

• "Generate docs for this file/project"
• "Are my docs up to date?"
• "Check for documentation drift"
• "Set up auto-docs on my commits"
• "Create an onboarding guide"
• "Document the architecture"
• "What's undocumented in this codebase?"