Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/notque/vexjoy-agentnpx agentmods add skills/notque/vexjoy-agent/docs-sync-checkerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/notque/vexjoy-agent/docs-sync-checker)<a href="https://agentmods.dev/skills/notque/vexjoy-agent/docs-sync-checker"><img src="https://agentmods.dev/badge/skills/notque/vexjoy-agent/docs-sync-checker/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/notque/vexjoy-agent/docs-sync-checker"><img src="https://agentmods.dev/badge/skills/notque/vexjoy-agent/docs-sync-checker.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 212 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
What 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 5.1 | $0.00012 | $0.02532 |
| Opus 5.5 | $0.00005 | $0.01013 |
| Sonnet 5.5 | $0.00002 | $0.00506 |
| Haiku 4.5 | $0.00001 | $0.00253 |
Grade A, and why
docs-sync-checker scanned grade A with 0 findings 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 25d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Documentation Sync Checker Skill
Deterministic 4-phase drift detector that compares the filesystem against README entries. Each phase (Scan, Cross-Reference, Detect, Report) has a gate that must pass before proceeding. The skill produces a sync score (percentage of tools properly documented) and actionable fix suggestions for every detected issue.
This skill checks documentation presence and absence only -- it does not judge description quality, generate documentation content, resolve merge conflicts, validate cross-references, or track when drift occurred. Suggested fixes use YAML descriptions verbatim; content generation and quality assessment require different skills.
Optional flags: --auto-fix (experimental, requires explicit opt-in), --strict (exit code 1 on issues), --format json (machine-readable output for CI/CD).
Instructions
Phase 1: SCAN
Goal: Discover all skills, agents, and commands in the repository filesystem. All discovery (file existence checks, YAML parsing, markdown extraction) must be deterministic -- no AI judgment on content quality.
Step 1: Run the scan script
python3 skills/meta/docs-sync-checker/scripts/scan_tools.py --repo-root $HOME/vexjoy-agent
Step 2: Validate discovery results
For each tool type, verify:
Skills (skills/**/SKILL.md):
- File has opening
---and closing---YAML delimiters - YAML contains non-empty
nameanddescriptionfields namefield matches directory name (e.g.,skills/code-quality/code-linting/hasname: code-linting)
Agents (agents/*.md):
- File has valid YAML frontmatter with
namefield - Filename (without .md) matches YAML
namevalue
Commands (commands/**/*.md):
- File exists as markdown in commands/ directory
- Namespaced commands in subdirectories (e.g.,
commands/code/cleanup.md) are detected
Step 3: Validate the docs routing catalog
Every docs/*.md file (outside archive/ and images/) carries frontmatter with summary and read_when — the on-demand load triggers for docs, matching what skills/INDEX.json gives skills.
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/documentation-structure.md 6.5 KB
- references/examples.md 12 KB
- references/integration-guide.md 3.9 KB
- references/markdown-formats.md 7.5 KB
- references/sync-rules.md 7.8 KB
- scripts/generate_report.py 11 KB runs code
- scripts/parse_docs.py 18 KB runs code
- scripts/scan_tools.py 12 KB runs code
- scripts/validate.py 5.1 KB runs code
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.
- 26d ago Changed · -214 lines · +12 tokens per session 9498162ffb16
- 27d ago Changed · -5 lines 23474c146fbd
- 1mo ago First seen · 277 lines · 12 tokens per session scan A 398b4c74dbbd
docs-sync-checker is a skill published in the GitHub repository notque/vexjoy-agent (442 stars, last pushed today), licensed MIT. It adds 12 tokens to every session and 2,532 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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