Adds agent-optimized output mode for `bd list` triggered by:
- BD_AGENT_MODE=1 environment variable (explicit)
- CLAUDE_CODE environment variable (auto-detect)
Agent mode provides:
- Ultra-compact format: just "ID: Title" per line
- Lower default limit (20 vs 50) for context efficiency
- No colors, no emojis, no pager
- Defaults to open/in_progress only (existing behavior)
(bd-x2ht)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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