canon-hermes-plugin 0.2.3

Canon messaging platform plugin for Hermes Agent (canon-bridge backed)

Canon Hermes Plugin

Canon messaging platform plugin for Hermes Agent, built on the local canon-bridge daemon: the plugin is a thin canon-framework consumer, and every Canon wire concern (REST, SSE delivery, RTDB planes, durable HITL, media) lives in the bridge process the plugin spawns.

Install

pip install canon-hermes-plugin
canon-hermes install --setup

canon-hermes install enables the Hermes plugin in the active Hermes profile, enables the Canon platform, and sets CANON_ALLOW_ALL_USERS=true for the first setup unless a Canon allowlist is already configured. Add --setup to immediately register or reconnect a Canon agent profile. If console scripts are not on PATH, use python -m canon_hermes_plugin.cli install --setup instead. Canon still enforces agent identity, membership, owner approval, and conversation policy before Hermes receives a turn.

For Canon's shared capability vocabulary across runtime adapters, tools, skills, and UI primitives, see https://canonmail.com/agents/integration-capability-manifest.

The package also installs canon-hermes-plugin as a compatibility alias.

Runtime requirement: Node (not npm)

The wheel bundles the canon-bridge JS as package data (canon_hermes_plugin/_bridge/…, produced by scripts/bundle_bridge.mjs). At runtime the plugin spawns it as a managed child over stdio — the bridge dies with the gateway process; nothing daemonizes.

• Container images (Railway-style) need Node ≥ 20 in the image — npm is NOT required. A couple of Dockerfile lines, e.g.:

  COPY --from=node:22-slim /usr/local/bin/node /usr/local/bin/node
  

• Bridge resolution order (canon-framework): $CANON_BRIDGE_BIN → the wheel-bundled dist → repo dev checkout (packages/bridge/dist) → canon-bridge on PATH → ~/.canon/bin/canon-bridge.

• Knobs: CANON_BRIDGE_MODE (auto | connect | managed-child), CANON_BRIDGE_BIN, CANON_BRIDGE_NODE.

• canon-hermes doctor reports the resolved Node + bridge entry.

Development

cd adapters/hermes-plugin
node scripts/bundle_bridge.mjs        # embed the bridge dist (also run before publishing)
uv run --with pytest --with-editable . pytest tests -q

In a monorepo checkout the bundle step is optional for tests — the plugin falls back to the repo-relative packages/bridge/dist build. uv resolves canon-framework from packages/framework-py via [tool.uv.sources]; published wheels depend on the PyPI canon-framework release instead.

The plugin does not require a public webhook server and does not require npm at runtime.