Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/agent-sh/agentsys/sync-docsnpx skills add agent-sh/agentsys --skill sync-docsgit clone --depth 1 https://github.com/agent-sh/agentsysWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00033 | $0.02639 |
| Opus 5 | $0.00016 | $0.01319 |
| Sonnet 5 | $0.00007 | $0.00528 |
| Haiku 4.5 | $0.00003 | $0.00264 |
Grade B, and why
sync-docs scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Asks the agent to reveal its instructionsmediumSystem prompt leakage
Directions to print, repeat or translate the system prompt extract configuration the operator did not intend to expose.
// User wants to install ast-grep, show instructions How it starts
The opening of the file, as written. The whole thing — 352 lines — stays where its author put it; the contents beside it link to each section on GitHub.
sync-docs
Unified skill for syncing documentation with code state. Combines discovery, analysis, and CHANGELOG update into a single workflow.
Parse Arguments
const args = '$ARGUMENTS'.split(' ').filter(Boolean);
const mode = args.find(a => ['report', 'apply'].includes(a)) || 'report';
const scope = args.find(a => a.startsWith('--scope='))?.split('=')[1] || 'recent';
const includeUndocumented = args.includes('--include-undocumented');
Quick Start - Agent Instructions
Step 1: Get changed files (use Bash):
# Recent changes (default scope)
git diff --name-only origin/main..HEAD 2>/dev/null || git diff --name-only HEAD~5..HEAD
# Or for all files
git ls-files '*.md'
Step 2: Find docs that reference changed files (use Grep):
- Search for filenames, function names, class names in
*.mdfiles - Check README.md, CHANGELOG.md, docs/*.md
Step 3: Analyze each doc for issues:
- Version mismatches (compare doc versions to package.json)
- Removed exports (symbols in docs but not in code)
- Outdated code examples
- Import path changes
Step 4: Check CHANGELOG:
- Look for
## [Unreleased]section - Compare recent commit messages to CHANGELOG entries
Step 5: If repo-map exists ({stateDir}/repo-map.json - platform state directory):
- Load it to get accurate export list
- Find exports not mentioned in any documentation
- Report as
undocumented-exportissues
Input
Arguments: [report|apply] [--scope=all|recent|before-pr] [--include-undocumented]
- Mode:
report(default) orapply - Scope:
recent(default): Files changed since last commit to mainall: Scan all docs against all codebefore-pr: Files in current branch, optimized for /next-task Phase 11
- --include-undocumented: Find exports not mentioned in any docs (uses repo-map)
Architecture
This skill orchestrates all documentation sync operations:
sync-docs skill
|-- Phase 1: Detect project context
|-- Phase 2: Find related docs (lib/collectors/docs-patterns)
|-- Phase 3: Analyze issues
|-- Phase 3.5: Find undocumented exports (repo-map integration)
|-- Phase 4: Check CHANGELOG
|-- Phase 5: Return structured results
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 352 lines · 33 tokens per session scan B 171631f2966c
sync-docs is a skill published in the GitHub repository agent-sh/agentsys (980 stars, last pushed 5d ago), licensed MIT. It adds 33 tokens to every session and 2,639 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (asks the agent to reveal its instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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