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Fusion 63ae706dd0 feat(tool-config): add categories, interfaces, and config management
Add support for tool categories, interface types, and per-tool configuration.

Backend:
- Add category and interfaces fields to ToolType model
- Create ToolConfig model for storing tool-specific settings
- Add tool_configs API endpoints (CRUD)
- Update built-in tool types with categories and interfaces:
  - code-server: editor, [web]
  - jupyter-notebook: notebook, [web]
  - opencode: ai-assistant, [terminal]
- Update instance API to include tool type interfaces
- Create Alembic migrations 0008 and 0009

Frontend:
- Update ToolType and Session interfaces with new fields
- Conditionally show Open/Terminal buttons based on tool interfaces
- Add API client for tool configs

OpenSpec: tool-config-management change created and implemented.
2026-05-20 11:03:09 +02:00

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## Context
Tool instances currently start with hardcoded compose templates. There's no way for users to provide API keys (OpenAI, Anthropic), custom settings, or files that tools need. We need a flexible config system that supports both environment variables and file-based configs.
## Goals / Non-Goals
**Goals:**
- Store tool configs per user (global) and per project
- Support env vars and file-based configs
- Mount configs into containers at startup
- Add tool categories (editor, notebook, ai-assistant)
- Add interface types (web, terminal) to control UI
- Add OpenCode as built-in terminal tool
**Non-Goals:**
- Secret encryption at rest (for now)
- Config validation beyond basic type checking
- Per-instance configs (only global and project-scoped)
## Decisions
### Config scope: user-global and user+project
**Decision:** Two scopes - global (user-level) and project-specific (user+project level)
**Rationale:** Some configs (like OpenAI API key) are user-global. Others (like project-specific paths) are per-project.
### Config types: env and file
**Decision:** Support two config types: `env` (injected as environment variables) and `file` (written to files and mounted)
**Rationale:** Most tools need env vars. Some (like OpenCode) need config files.
### Tool categories as enum
**Decision:** Predefined categories: `editor`, `notebook`, `ai-assistant`, `other`
**Rationale:** Simple, predictable, drives UI behavior.
### Interfaces as array
**Decision:** ToolType.interfaces is a JSON array of strings: `["web"]`, `["terminal"]`, `["web", "terminal"]`
**Rationale:** Flexible, allows combination interfaces.
## Risks / Trade-offs
**[Risk]** Config files in container filesystem are readable by any process in container
**Mitigation:** Document this. Future: use Docker secrets for sensitive values.
**[Risk]** Storing API keys in plain text in database
**Mitigation:** Acceptable for MVP. Future: encrypt sensitive configs.
## Migration Plan
1. Create migrations for tool_types (category, interfaces) and tool_configs tables
2. Update seed data for built-in types
3. Deploy backend changes
4. Update frontend to show categories and config UI
5. Test with OpenCode instance
## Open Questions
- Should we encrypt sensitive configs now or later?
- Do we need config templates/tooling per tool type?