This directory is empty by design. The plugin loader infrastructure (backend/app/hookspecs.py, backend/app/main.py discovery via PluginForge, backend/app/import_plugins/ registry) is in place; no plugin packages ship with the skeleton.

A plugin is a separate Python package that declares an entry point under the group adaptive_learner.plugins.

Minimal layout:

plugins/adaptive-learner-plugin-<name>/
├── pyproject.toml
├── adaptive_learner_<name>/
│   ├── __init__.py
│   ├── plugin.py        # <Name>Plugin(BasePlugin) with hook impls
│   └── routes.py        # optional FastAPI router
└── tests/
    └── test_<name>.py

pyproject.toml entry-point declaration:

[tool.poetry.plugins."adaptive_learner.plugins"]
<name> = "adaptive_learner_<name>.plugin:<Name>Plugin"

Register the path-dep in backend/pyproject.toml:

adaptive-learner-plugin-<name> = {path = "../plugins/adaptive-learner-plugin-<name>", develop = true}

Enable in backend/config/app.yaml:

plugins:
  enabled:
    - <name>

After editing pyproject: cd backend && poetry lock && poetry install.

Hook signatures live in backend/app/hookspecs.py. Each carries an api_version constant; bump it when changing a signature so existing plugins fail loudly instead of silently misbehaving.