Borrowing it
Nothing to install: this file belongs to duyet/oma. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/duyet/oma/main/.claude/skills/preflight/SKILL.mdgit clone --depth 1 https://github.com/duyet/omaWrote 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/duyet/oma/preflight)<a href="https://agentmods.dev/skills/duyet/oma/preflight"><img src="https://agentmods.dev/badge/skills/duyet/oma/preflight/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/duyet/oma/preflight"><img src="https://agentmods.dev/badge/skills/duyet/oma/preflight.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 | $0.00051 | $0.00264 |
| Opus 5.5 | $0.00020 | $0.00106 |
| Sonnet 5.5 | $0.00010 | $0.00053 |
| Haiku 4.5 | $0.00005 | $0.00026 |
Grade A, and why
preflight 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 1mo 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.
What it actually says
Run the repo's complete local verification gate, in order, from the repo root.
pnpm typecheck— roottsc --noEmitplus the node-only typecheck pass.pnpm test— runs all three vitest suites in sequence (Cloudflare Workers pool → node-pool packages → console).
Both are composite scripts in the root package.json. Run them as-is — do not substitute the individual sub-runs (vitest run, test:packages, test:console); they drift when the scripts change.
Report the outcome plainly:
- If both pass, say so and that the branch is safe to push.
- If either fails, show the failing output and stop — do not report success, and never skip a suite silently. Fix forward, or surface the failure and ask.
Why this skill exists: there is no test/typecheck GitHub workflow, so nothing gates PRs server-side. This local run is the gate.
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.
- 1mo ago First seen · 18 lines · 51 tokens per session scan A 764a88a0c120
preflight is a skill published in the GitHub repository duyet/oma (10 stars, last pushed 9d ago), licensed Apache-2.0. It adds 51 tokens to every session and 264 once invoked, about $0.0002 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 2026-08-31.
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