95 lines
3.4 KiB
Markdown
95 lines
3.4 KiB
Markdown
# Claude Code Integration Design
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This document explains design decisions for Claude Code integration in beads.
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## Integration Approach
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**Recommended: CLI + Hooks** - Beads uses a simple, universal approach to Claude Code integration:
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- `bd prime` command for context injection (~1-2k tokens)
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- Hooks (SessionStart/PreCompact) for automatic context refresh
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- Direct CLI commands with `--json` flags
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- Optional: Plugin for slash commands and enhanced UX
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**Alternative: MCP Server** - For MCP-only environments (Claude Desktop, no shell):
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- Higher context overhead (MCP tool schemas)
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- Use only when CLI is unavailable
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## Why CLI + Hooks Over MCP?
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**Context efficiency matters**, even with large context windows:
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1. **Compute cost scales with tokens** - Every token in your context consumes compute on every inference, regardless of whether it's used
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2. **Latency increases with context** - Larger prompts take longer to process
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3. **Energy consumption** - Each token has environmental impact; lean prompts are more sustainable
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4. **Attention quality** - Models attend better to smaller, focused contexts
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**The math:**
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- MCP tool schemas can add 10-50k tokens to context (depending on number of tools)
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- `bd prime` adds ~1-2k tokens of workflow context
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- That's 10-50x less context overhead
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**When context size doesn't matter:**
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- MCP-only environments where CLI isn't available (Claude Desktop)
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- Very short conversations where context overhead is negligible
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**When to prefer CLI + hooks:**
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- Any environment with shell access (Claude Code, Cursor, Windsurf, etc.)
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- Long conversations or coding sessions
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- Multi-editor workflows (CLI is universal)
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## Why Not Claude Skills?
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**Decision: Beads does NOT use or require Claude Skills (.claude/skills/)**
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### Reasons
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1. **Redundant with bd prime**
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- `bd prime` already provides workflow context (~1-2k tokens)
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- Skills would duplicate this information
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- More systems = more complexity
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2. **Simplicity is core to beads**
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- Workflow fits in simple command set: ready → create → update → close → sync
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- Already well-documented in ~1-2k tokens
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- Complex workflow orchestration not needed
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3. **Editor agnostic**
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- Skills are Claude-specific
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- Breaks beads' editor-agnostic philosophy
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- Cursor, Windsurf, Zed, etc. wouldn't benefit
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4. **Maintenance burden**
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- Another system to document and test
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- Another thing that can drift out of sync
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- Another migration path when things change
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### If Skills were needed...
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They should be:
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- Provided by the beads plugin (not bd core tool)
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- Complementary (not replacing) bd prime
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- Optional power-user workflows only
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- Opt-in, never required
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### Current approach is better
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- ✅ `bd prime` - Universal context injection
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- ✅ Hooks - Automatic context refresh
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- ✅ Plugin - Optional Claude-specific enhancements
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- ✅ MCP - Optional native tool access (legacy)
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- ❌ Skills - Unnecessary complexity
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Users who want custom Skills can create their own, but beads doesn't ship with or require them.
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## Related Files
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- `cmd/bd/prime.go` - Context generation
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- `cmd/bd/setup/claude.go` - Hook installation
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- `cmd/bd/doctor/claude.go` - Integration verification
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- `docs/CLAUDE.md` - General project guidance for Claude
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## References
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- [Claude Skills Documentation](https://support.claude.com/en/articles/12580051-teach-claude-your-way-of-working-using-skills)
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- [Claude Skills Best Practices](https://docs.claude.com/en/docs/agents-and-tools/agent-skills/best-practices)
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