What is gbrain-coding?

A coding-focused variant of the GBrain plugin for agents working inside a software repository. It includes instructions for retrieving knowledge, routing tasks, importing content carefully, and handling corrections.

Finding relevant project knowledge, deciding which instruction applies, adding information under the right rules, and correcting existing knowledge.

It gives coding agents a repository-oriented way to use shared memory while reducing duplicate or incorrectly filed information.

gbrain-coding — Plugin by garrytan

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.

agentmods

npx agentmods add plugins/garrytan/gbrain/gbrain-coding

Claude Code

/plugin marketplace add garrytan/gbrain

Clone the repo

git clone --depth 1 https://github.com/garrytan/gbrain

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

gbrain-coding 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 yesterday.

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.

plugin-variants/gbrain-coding/.claude-plugin/plugin.json · 35 lines

What it actually says

{
  "name": "gbrain-coding",
  "version": "0.47.6.0",
  "description": "Brain-first coding agent working inside a repo: retrieval, routing, ingest discipline, correction hygiene. Default persona for the claude-code harness bridge; also published as the gbrain-coding marketplace variant. (persona variant of the gbrain plugin — 20 skills)",
  "author": {
    "name": "Garry Tan",
    "url": "https://github.com/garrytan"
  },
  "homepage": "https://github.com/garrytan/gbrain",
  "repository": "https://github.com/garrytan/gbrain",
  "license": "MIT",
  "keywords": [
    "memory",
    "knowledge-base",
    "mcp",
    "search",
    "agent",
    "brain",
    "pgvector"
  ],
  "skills": "./skills/",
  "mcpServers": {
    "gbrain": {
      "command": "${CLAUDE_PLUGIN_ROOT}/.agents/gbrain-launcher",
      "args": [
        "serve",
        "--surface",
        "starter",
        "--source-guard"
      ],
      "cwd": "${CLAUDE_PLUGIN_ROOT}"
    }
  }
}

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.

yesterday First seen · 35 lines scan A 72d6ec3cb154

Subscribe to this mod's changes

gbrain-coding is a plugin published in the GitHub repository garrytan/gbrain (29,316 stars, last pushed 2d ago), licensed MIT. 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 2026-08-30.

Writing and docs

gbrain-coding

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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