Implements bd-122: Document how to use beads across multiple projects
Added comprehensive multi-repo documentation:
- README.md: Global daemon section with architecture diagram
- AGENTS.md: MCP multi-repo configuration (global daemon + per-project)
- integrations/beads-mcp/README.md: BEADS_WORKING_DIR usage
- Mermaid diagram showing one daemon serving multiple repos
Documentation covers:
- Global daemon (bd daemon --global) for system-wide usage
- Per-project MCP instances with BEADS_WORKING_DIR
- Comparison table (local vs global)
- When to use each approach
- Example workflows for multi-project setups
Benefits of global daemon:
- One daemon process for all repos
- Automatic socket discovery (local -> global fallback)
- Better resource usage
- Per-request context routing to correct database
Amp-Thread-ID: https://ampcode.com/threads/T-ea606216-b886-4af0-bba8-56d000362d01
Co-authored-by: Amp <amp@ampcode.com>
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