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97990e7ad5
Plugin system for extending Hermes with custom tools, hooks, and
integrations — no source code changes required.
Core system (hermes_cli/plugins.py):
- Plugin discovery from ~/.hermes/plugins/, .hermes/plugins/, and
pip entry_points (hermes_agent.plugins group)
- PluginContext with register_tool() and register_hook()
- 6 lifecycle hooks: pre/post tool_call, pre/post llm_call,
on_session_start/end
- Namespace package handling for relative imports in plugins
- Graceful error isolation — broken plugins never crash the agent
Integration (model_tools.py):
- Plugin discovery runs after built-in + MCP tools
- Plugin tools bypass toolset filter via get_plugin_tool_names()
- Pre/post tool call hooks fire in handle_function_call()
CLI:
- /plugins command shows loaded plugins, tool counts, status
- Added to COMMANDS dict for autocomplete
Docs:
- Getting started guide (build-a-hermes-plugin.md) — full tutorial
building a calculator plugin step by step
- Reference page (features/plugins.md) — quick overview + tables
- Covers: file structure, schemas, handlers, hooks, data files,
bundled skills, env var gating, pip distribution, common mistakes
Tests: 16 tests covering discovery, loading, hooks, tool visibility.
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| .. | ||
| _category_.json | ||
| acp.md | ||
| batch-processing.md | ||
| browser.md | ||
| checkpoints.md | ||
| code-execution.md | ||
| context-files.md | ||
| cron.md | ||
| delegation.md | ||
| fallback-providers.md | ||
| honcho.md | ||
| hooks.md | ||
| image-generation.md | ||
| mcp.md | ||
| memory.md | ||
| personality.md | ||
| plugins.md | ||
| provider-routing.md | ||
| rl-training.md | ||
| skills.md | ||
| skins.md | ||
| tools.md | ||
| tts.md | ||
| vision.md | ||
| voice-mode.md | ||