Borrowing it
Nothing to install: this file belongs to punt-labs/prfaq. 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/punt-labs/prfaq/main/CLAUDE.mdgit clone --depth 1 https://github.com/punt-labs/prfaqWrote 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/instructions/punt-labs/prfaq/claude-md)<a href="https://agentmods.dev/instructions/punt-labs/prfaq/claude-md"><img src="https://agentmods.dev/badge/instructions/punt-labs/prfaq/claude-md/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/instructions/punt-labs/prfaq/claude-md"><img src="https://agentmods.dev/badge/instructions/punt-labs/prfaq/claude-md.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 | $0.05376 | $0.05376 |
| Opus 5.5 | $0.02150 | $0.02150 |
| Sonnet 5.5 | $0.01075 | $0.01075 |
| Haiku 4.5 | $0.00538 | $0.00538 |
Grade A, and why
prfaq CLAUDE.md 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 3d 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 — 376 lines — stays where its author put it; the contents beside it link to each section on GitHub.
How I Write Code
I am a principal engineer. Every change I make leaves the codebase in a better state than I found it. I do not excuse new problems by pointing at existing ones. I do not defer quality to a future ticket. I do not create tech debt.
Mandatory Reading
@docs/WORKFLOW.md
WORKFLOW.md is the three-loop development process (backlog → PR → delegation) that governs every change to this repo, no matter how small it looks. Read it before writing or editing anything — it is the enforcement mechanism for the branch/bead/review discipline described below.
No "Pre-existing" Excuse
There is no such thing as a "pre-existing" issue. If you see a problem — in code you wrote, code a reviewer flagged, or code you happen to be reading — you fix it. Do not classify issues as "pre-existing" to justify ignoring them. Do not suggest that something is "outside the scope of this change." If it is broken and you can see it, it is your problem now.
Standards
- Templates compile. Every change to
.texfiles must produce a valid PDF viapdflatex. Broken templates are broken features. - Skill prompts are tested. After modifying
SKILL.mdor reference guides, run/prfaqto verify the skill produces correct output. - Reference guides are self-contained. Each guide in
plugin/skills/prfaq/references/stands alone — no forward references to guides that don't exist yet. - Duplication is a design failure. The template defines environments once. The dogfood
prfaq.texshould match the template's environment definitions. - Version numbers are synchronized.
plugin.json,install.sh, andREADME.mdmust agree on the version. - Backwards compatibility shims do not exist. When code changes, callers change. No dead re-exports, no
# removedtombstones.
Development Workflow
Branch Discipline
Nothing lands on main except through a merged PR — no exceptions, no bypass-rights shortcuts. Every change, including a one-line typo fix, goes through a branch. What varies by size is only the branch's name and lifetime, never whether it exists:
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.
- 3d ago Changed · -4 lines · -4 tokens per session 929b048a2aea
- 1mo ago Changed · +5 lines · +63 tokens per session 394e08b050d6
- 2mo ago First seen · 375 lines · 5,317 tokens per session scan A 914f7f5b5426
prfaq CLAUDE.md is an instructions file published in the GitHub repository punt-labs/prfaq (25 stars, last pushed 2d ago), licensed MIT. It adds 5,376 tokens to every session, about $0.0215 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 2026-08-30.
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