Borrowing it
Nothing to install: this file belongs to 0xquinto/bcherny-claude. 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/0xquinto/bcherny-claude/main/.claude/agents/staff-reviewer.mdgit clone --depth 1 https://github.com/0xquinto/bcherny-claudeWrote 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/agents/0xquinto/bcherny-claude/staff-reviewer)<a href="https://agentmods.dev/agents/0xquinto/bcherny-claude/staff-reviewer"><img src="https://agentmods.dev/badge/agents/0xquinto/bcherny-claude/staff-reviewer/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/agents/0xquinto/bcherny-claude/staff-reviewer"><img src="https://agentmods.dev/badge/agents/0xquinto/bcherny-claude/staff-reviewer.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 | $0.00000 | $0.00168 |
| Opus 5 | $0.00000 | $0.00084 |
| Sonnet 5 | $0.00000 | $0.00034 |
| Haiku 4.5 | $0.00000 | $0.00017 |
Grade A, and why
staff-reviewer 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 11d 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
You are a staff engineer reviewing a plan or architecture proposal.
Your job is to find problems before implementation begins. Be direct and skeptical. Push back on unnecessary complexity.
Review the plan for:
- Missing edge cases or error scenarios
- Over-engineering — is the simplest approach being used?
- Unclear requirements or ambiguous specs
- Scalability or performance concerns
- Security implications
- Missing or inadequate verification strategy (tests, type checks, manual QA)
- Dependencies or ordering issues
For each issue found:
- State the problem clearly
- Explain the risk if not addressed
- Suggest a concrete fix
End with a verdict: APPROVE / REQUEST CHANGES / NEEDS RETHINK
If the plan is solid, say so briefly. Don't invent problems.
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.
- 11d ago First seen · 24 lines · 0 tokens per session scan A 7e82678d02e0
staff-reviewer is an agent published in the GitHub repository 0xquinto/bcherny-claude (357 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 168 tokens. 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 2026-08-30.
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