agent-guidance

Loads provider-specific context files (CLAUDE.md, CODEX.md, GEMINI.md) based on current model, supplementing Pi's AGENTS.md loading.

How It Works

flowchart LR
    S1["~/.pi/agent/"] --> B
    S2["project/"] --> B
    
    subgraph Core ["Pi Core"]
        B["Load all AGENTS.md<br/><sub>(CLAUDE.md as fallback)</sub>"]
    end
    
    subgraph Ext ["agent-guidance extension"]
        B --> C{Which provider?}
        C -->|Anthropic| D[+ CLAUDE.md]
        C -->|OpenAI/Codex| E[+ CODEX.md]
        C -->|Google| F[+ GEMINI.md]
    end
    
    D --> G[System Prompt]
    E --> G
    F --> G

Provider	File
Anthropic	CLAUDE.md
OpenAI / Codex	CODEX.md
Google	GEMINI.md

Pi Core behavior

Pi Core loads AGENTS.md from ~/.pi/agent/ and project directories (walking up from cwd). Falls back to CLAUDE.md if no AGENTS.md exists.

What this extension adds

For each directory, loads the provider-specific file if:

• AGENTS.md exists (so core didn't load the provider file as fallback)
• Content differs from AGENTS.md (handles copy scenario)

Install

Pi package manager

pi install npm:@tmustier/pi-agent-guidance

pi install git:github.com/tmustier/pi-extensions

Then filter to just this extension in ~/.pi/agent/settings.json:

{
  "packages": [
    {
      "source": "git:github.com/tmustier/pi-extensions",
      "extensions": ["agent-guidance/agent-guidance.ts"]
    }
  ]
}

Local clone (setup script)

./setup.sh

Links the extension to ~/.pi/agent/extensions/ and helps you set up AGENTS.md.

Templates

Starter templates in templates/:

• CLAUDE.md - Claude-specific guidelines
• CODEX.md - OpenAI guidelines: <solution_persistence> (bias for action, persist till the task is done) and <validation> (run tests/lint/typecheck/build before summarizing or committing)
• GEMINI.md - Gemini guidelines: <tool_usage_rules> steering the model to pi's read/write/edit tools instead of cat/heredoc/sed -i/etc.

Install with:

ln -s ~/pi-extensions/agent-guidance/templates/CLAUDE.md ~/.pi/agent/

Configuration (Optional)

Create ~/.pi/agent/agent-guidance.json:

{
  "providers": { "anthropic": ["CLAUDE.md"] },
  "models": { "claude-3-5*": ["CLAUDE-3-5.md"] }
}

Changelog

See CHANGELOG.md.