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 skills add mathiasbourgoin/roster --skill arch-index-auditgit clone --depth 1 https://github.com/mathiasbourgoin/rosterWrote 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/mathiasbourgoin/roster/arch-index-audit)<a href="https://agentmods.dev/skills/mathiasbourgoin/roster/arch-index-audit"><img src="https://agentmods.dev/badge/skills/mathiasbourgoin/roster/arch-index-audit/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/mathiasbourgoin/roster/arch-index-audit"><img src="https://agentmods.dev/badge/skills/mathiasbourgoin/roster/arch-index-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00040 | $0.00406 |
| Opus 5 | $0.00020 | $0.00203 |
| Sonnet 5 | $0.00008 | $0.00081 |
| Haiku 4.5 | $0.00004 | $0.00041 |
Grade A, and why
arch-index-audit 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 today.
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.
What it actually says
arch-index-audit
Audit-section provider for roster-audit and code-quality-auditor. audit.sh
emits a markdown fragment on stdout, read-only against the SQLite index at
.arch-index/index.db (built by arch-index-init — never regenerated here).
The fragment's first content line is the mandatory index-freshness header:
<!-- index-freshness: <index.db mtime, ISO-8601 UTC> vs HEAD <commit short> -->
so consumers (and humans) can see when the index is stale relative to HEAD.
Steps
- The consumer (
scripts/code-intel-resolve.js audit) invokesbash audit.shfrom the project root with no arguments. - Degradation checks: index DB absent → exit 3 "index-missing"; neither
arch-indexnorsqlite3on PATH → exit 3. The consumer replaces the section with a one-line degraded notice and the audit continues. - The freshness header prints first, then up to three subsections — each only
when its query returns data:
- Fan-in hotspots — top symbols by caller count (change-risk concentration).
- Exposed and underdocumented — public symbols with a low
comment_quality_score. - Exit/panic reachability — call edges reaching
exit/panic/abort.
- Severity of anything reported here stays model-judged by the hosting audit; this fragment is deterministic evidence, not a verdict.
What ships with it
1 file 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.
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.
- today First seen · 40 lines · 40 tokens per session scan A 1dddadfe30cf
arch-index-audit is a skill published in the GitHub repository mathiasbourgoin/roster (2 stars, last pushed today), licensed MIT. It adds 40 tokens to every session and 406 once invoked, about $0.0002 per session on Opus 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 2026-09-12.
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