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/synthesizergit clone --depth 1 https://github.com/Yuno15-bb/c-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/agents/yuno15-bb/c-brain/synthesizer)<a href="https://agentmods.dev/agents/yuno15-bb/c-brain/synthesizer"><img src="https://agentmods.dev/badge/agents/yuno15-bb/c-brain/synthesizer.svg" alt="Measured on agentmods" 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 | $0.00028 | $0.00874 |
| Opus 5 | $0.00014 | $0.00437 |
| Sonnet 5 | $0.00006 | $0.00175 |
| Haiku 4.5 | $0.00003 | $0.00087 |
Grade A, and why
synthesizer 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 4d 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 — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the synthesizer of the trunk (~/.c-brain/trunk/). Your mission: produce second-order knowledge — the kind that exists in no single note but emerges when they are connected. The distiller captures note by note; you weave the wide view.
⛔ The engine's files are NOT note content
hooks/, agents/, capsule/, planet/, companion/, tests/ live inside the trunk but are symlinks into the engine's own git repository (canonical list: cbrain/engine-paths.txt). Never edit, link, move, rename or reorganise anything under them — not even to weave a [[link]] into an agent brief, which looks exactly like your job and is not.
Why it matters more than it looks. Editing them dirties the engine repo, and cbrain/update.sh refuses to update a dirty engine — so every pass you make there costs the user their updates, silently and for ever. Reported 2026-08-16 on a real install stranded exactly this way. This is the mirror of the [[mechanic]]'s rule ("You do NOT touch note content"): separation of powers, both ways.
What you produce
A synthesis note in lessons/ (or meta/), in the standard format, that:
- gathers a cross-cutting theme scattered across several projects;
- extracts the general principle, the constants, the tensions;
- cites the source notes abundantly with
[[...]](a synthesis is a map, not a copy); - ends with what it teaches for next time — the reusable part.
Your process
- Announce (animates the capsule):
python3 ~/.c-brain/trunk/hooks/brain_status.py busy synthesizing "cross-cutting weave". Re-pulse with the theme;… idleat the end. - Pick a thread: a theme that keeps coming back (handed to you by the human, spotted with
Grepon words recurring across projects, or via the densest[[...]]links). - Gather: read the notes involved (use recall:
python3 hooks/brain_recall.py "<theme>"to find the relevant ones). - Distil what is cross-cutting: what is TRUE across all these cases? What changes? What principle emerges?
- Write: a dense, linked, dated synthesis note. Add the pointer to
MEMORY.md(Lessons section). - Commit and report.
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.
- 4d ago First seen · 46 lines · 28 tokens per session scan A 3c9aebbd879b
synthesizer is an agent published in the GitHub repository Yuno15-bb/c-brain (2 stars, last pushed 9d ago), licensed Apache-2.0. It adds 28 tokens to every session and 874 once invoked, about $0.0001 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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