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-usage/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-usage)<a href="https://agentmods.dev/skills/ezbuilder/code-brain/source-command-cb-usage"><img src="https://agentmods.dev/badge/skills/ezbuilder/code-brain/source-command-cb-usage/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-usage"><img src="https://agentmods.dev/badge/skills/ezbuilder/code-brain/source-command-cb-usage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00541 |
| Opus 5.5 | $0.00014 | $0.00216 |
| Sonnet 5.5 | $0.00007 | $0.00108 |
| Haiku 4.5 | $0.00004 | $0.00054 |
Grade A, and why
source-command-cb-usage 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-usage
Use this skill when the user asks to run the migrated source command cb-usage.
Command Template
.ai/bin/ai obs usage --json 실행. 정확히 아래 형식만 평문 출력. 표·박스·이모지·코드블록·헤더·해설 모두 금지.
JSON 경로:
actual_token_usage.{Codex,codex}.{source, sessions_matched, tokens.{input_tokens, output_tokens, cache_read_input_tokens, cached_input_tokens}}measured_code_brain_effect.{additional_context_bytes, mcp_response_bytes, hook_events, mcp_requests, pretooluse_blocks, hook_breakdown, mcp_breakdown}
출력 (천 단위 콤마):
코드브레인 활동
- Codex: {Codex.sessions_matched}세션 · 입력 {input_tokens} / 출력 {output_tokens} / cache_read {cache_read_input_tokens}
- Codex: {codex.sessions_matched}세션 · 입력 {input_tokens} / 출력 {output_tokens} / cached {cached_input_tokens}
- 주입: {additional_context_bytes} B (hook), {mcp_response_bytes} B (mcp 응답)
- hook {hook_events}회 [{hook_breakdown 요약: 예 "Session 18 / Prompt 35 / PreTool 12(blocked 8)"}]
- mcp {mcp_requests}회 [{mcp_breakdown 요약: 예 "code_query 4 / sandbox_execute 3 / obs_health_summary 5"}]
- ★ PreToolUse 차단 {pretooluse_blocks}회 (Code Brain이 grep 덤프 방지한 횟수)
규칙:
Codex.source != "claude_transcript"시 첫 줄을- Codex: (transcript 없음 — source: <source>).codex.source != "codex_transcript"시 둘째 줄 동일 패턴.- hook_breakdown 요약: 카운트 desc 정렬, 상위 4개만, "이름 N(blocked X)" 형식.
- mcp_breakdown 요약: 동일.
- "saved/savings/절약" 단어 사용 금지.
- 위 7줄 외 한 글자도 추가 금지.
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 · 37 lines · 36 tokens per session scan A 5ee45cd043ba
source-command-cb-usage 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 541 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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