Borrowing it
Nothing to install: this file belongs to ezBuilder/code-brain. 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/ezBuilder/code-brain/main/.agents/skills/source-command-cb-proof/SKILL.mdgit clone --depth 1 https://github.com/ezBuilder/code-brainWrote 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/ezbuilder/code-brain/source-command-cb-proof)<a href="https://agentmods.dev/skills/ezbuilder/code-brain/source-command-cb-proof"><img src="https://agentmods.dev/badge/skills/ezbuilder/code-brain/source-command-cb-proof/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/ezbuilder/code-brain/source-command-cb-proof"><img src="https://agentmods.dev/badge/skills/ezbuilder/code-brain/source-command-cb-proof.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 | $0.00036 | $0.00239 |
| Opus 5.5 | $0.00014 | $0.00096 |
| Sonnet 5.5 | $0.00007 | $0.00048 |
| Haiku 4.5 | $0.00004 | $0.00024 |
Grade A, and why
source-command-cb-proof 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
source-command-cb-proof
Use this skill when the user asks to run the migrated source command cb-proof.
Command Template
쿼리가 있으면 .ai/bin/ai context prove "<쿼리>" --json, 없으면 .ai/bin/ai context prove --json 실행한다.
평문으로 전체 통과 여부, query/selection, effect status, graph/PPR 적용 여부와 ranked nodes, legacy/v2 signature 및 receipt 수, durability unchanged, 양쪽 p95, context bytes/max bytes를 출력한다. expected path가 있으면 path rank와 span overlap도 출력한다. 실패한 checks는 모두 나열하며 JSON에 없는 값은 추측하지 않는다.
정답 path/span 검증 원시 명령:
.ai/bin/ai context prove "<쿼리>" --expected-path <repo-relative-path> --start-line <N> --end-line <N> --repeats 5 --json
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 · 19 lines · 36 tokens per session scan A ed9a01bc7203
source-command-cb-proof is a skill published in the GitHub repository ezBuilder/code-brain (11 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 36 tokens to every session and 239 once invoked, about $0.0001 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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