Pynchy Plugin Authoring

Pynchy Plugin Authoring

When To Use

Use this skill when the user asks to:

• Create a new pynchy plugin
• Add a new hook to an existing plugin
• Register/enable plugins in config.toml
• Validate plugin discovery and runtime behavior

Core Rules

1. Keep plugin responsibilities narrow. One plugin can implement multiple hooks, but avoid unrelated concerns in one package.
2. In the plugin repository pyproject.toml (not pynchy/pyproject.toml), define entry points under [project.entry-points."pynchy"].
3. For host runtime/channel code, treat plugin code as high trust and avoid risky side effects in import-time code.
4. For plugin docs, cross-link to pynchy/docs/plugins/* instead of duplicating long explanations.
5. Refer to the quickstart guide for the recommended plugin directory structure.
6. Plugin config models belong in the plugin. Define Pydantic config models inside the plugin's own source file, not in pynchy/src/pynchy/config/models.py. The core config/models.py is for pynchy core settings only.

File Scope Conventions

When this skill mentions config files, use this mapping:

• Host app config: config.toml ([plugins.] entries enable repos)
• Host app package metadata: pyproject.toml
• Plugin package metadata: /pyproject.toml (entry points live here)
• Plugin source: /src//...

Authoring Workflow

Copy this checklist and complete it in order:

Plugin Authoring Checklist
- [ ] Choose plugin scope and hook categories
- [ ] Create plugin directory structure (or update existing plugin)
- [ ] Implement hook methods and runtime logic
- [ ] Add/update tests
- [ ] Configure local pynchy [plugins.] entry
- [ ] Run tests and smoke checks
- [ ] Update docs if behavior is user-visible

Hook Map

• pynchy_create_channel: Host-side channel instance
• pynchy_service_handler: Host-side service tool handlers (IPC dispatch)
• pynchy_skill_paths: Skill directories mounted into container
• pynchy_agent_core_info: Agent core implementation metadata
• pynchy_container_runtime: Host container runtime provider
• pynchy_workspace_spec: Managed workspace/task definitions (e.g., periodic agents)

Hook reference:

• docs/plugins/hooks.md

Config-Managed Plugin Registration

For local pynchy, prefer config-managed plugin repos:

[plugins.example]
repo = "owner/pynchy-plugin-example"
ref = "main"
enabled = true

Then restart pynchy. Startup sync handles clone/update and host install.

If the host is remote, don't forget to ssh into it and add the plugin to the config.toml file.

Validation Commands

For plugin repositories:

uv run pytest

For pynchy docs link safety after docs changes:

uv run mkdocs build --strict

Security

All plugin Python code runs on the host during discovery (__init__, validate(), category methods). Installing a plugin means trusting its code. Only install plugins from authors you trust.

For the full risk-by-category breakdown, see Plugin Security.

References

• Plugin overview: docs/plugins/index.md
• Plugin quickstart (creation guide): docs/plugins/quickstart.md
• Hook reference: docs/plugins/hooks.md
• Packaging guidance: docs/plugins/packaging.md
• Available plugin registry: docs/plugins/available.md

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: crypdick
• Source: crypdick/pynchy
• License: MIT
• Homepage: https://pynchy.ricardodecal.com/

Install and usage instructions live in the source repository linked above.