c-brain

A plugin that gives command-line coding agents a persistent knowledge store on the user's computer. It turns useful work sessions into linked notes and can surface those notes in later projects.

In plain words
What is it for?
Use it to capture lessons from work, organize them into a knowledge trunk, connect related notes, and recall past decisions during future tasks.
Why use it?
Important decisions and solutions are easy to lose between sessions or projects. Keeping the notes locally makes that knowledge available without sending it elsewhere.

Plugin for Claude Code

Install

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.

Claude Code
/plugin marketplace add Yuno15-bb/c-brain
agentmods
npx agentmods add plugins/yuno15-bb/c-brain/marketplace
Clone the repo
git clone --depth 1 https://github.com/Yuno15-bb/c-brain

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

c-brain 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.

.claude-plugin/marketplace.json · 16 lines

What it actually says

{
  "name": "c-brain",
  "description": "C Brain — a persistent, growing knowledge trunk for command-line agents.",
  "owner": {
    "name": "Dylan Peellaert",
    "url": "https://github.com/Yuno15-bb"
  },
  "plugins": [
    {
      "name": "c-brain",
      "source": "./",
      "description": "A memory that grows. What you work out once is distilled into a note, filed, linked, and surfaced automatically next time — from any project. Your notes stay on your machine and nothing is sent anywhere."
    }
  ]
}
Files

What ships with it

1 file beside marketplace.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 2d ago First seen · 16 lines scan A fb4901eeaead

Subscribe to this mod's changes

c-brain is a plugin published in the GitHub repository Yuno15-bb/c-brain (2 stars, last pushed 7d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.