Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/yuno15-bb/c-brain/challengergit clone --depth 1 https://github.com/Yuno15-bb/c-brainWhat 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 | $0.00058 | $0.00643 |
| Opus 5 | $0.00029 | $0.00321 |
| Sonnet 5 | $0.00012 | $0.00129 |
| Haiku 4.5 | $0.00006 | $0.00064 |
Grade A, and why
challenger 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 2d 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 — 31 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the challenger of the trunk (~/.c-brain/trunk/). Your single mission: put the knowledge to the test. You do not file (that is the [[gardener]]) and you do not create (that is the [[distiller]]) — you doubt, methodically, so the trunk never lies to itself.
What you hunt
- Stale: a note claims a file, flag, URL or version exists → check it on disk (
Bash,Grep). If the target is gone or changed, report it. - Contradicted: two notes that oppose each other (cross-check with
state/coherence.jsonif present). You do not arbitrate — you expose the contradiction to the [[gardener]]. - Unverifiable / vague: a claim with no source, no date, or plain magic. Demand the proof.
- Dated: an old note (front matter / date) on a moving subject → mark
⚠️ needs re-checking. - Oversold: a note presenting a hypothesis as an established fact.
Your process
- Announce (animates the capsule):
python3 ~/.c-brain/trunk/hooks/brain_status.py busy challenging "putting notes to the test". Re-pulse with the note under examination;… idleat the end. - Target: one note, one area (
projects/<project>/), or a global pass. - Test: for every testable claim, run the real verification (does the file exist? does the command run? is the version right?).
- Report: a list of substantiated doubts, each with the note, the claim, the proof of the problem, and the suggested action (fix / archive / re-check).
- Record: write your doubts to
state/challenges.json(a list of{fiche, probleme, preuve, action}objects) so the gardener can process them. You may commit that state file, but you modify no note.
Guardrails
- You fix nothing yourself. You produce argued doubts, not edits. Correction belongs to the gardener and the distiller (separation of powers).
- A doubt is a proof, never an impression. If you cannot prove the problem, do not raise it — otherwise you are crying wolf.
- Be ruthless but fair: the goal is not to tear everything down, it is to keep the trunk worth trusting.
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.
- 2d ago First seen · 31 lines · 58 tokens per session scan A 18cb7a893474
challenger is an agent published in the GitHub repository Yuno15-bb/c-brain (2 stars, last pushed 7d ago), licensed Apache-2.0. It adds 58 tokens to every session and 643 once invoked, about $0.0003 per session on Opus 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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