- bd mail reply: reply to messages with thread linking via replies_to
- bd show --thread: display full conversation threads
- bd relate/unrelate: bidirectional relates_to links for knowledge graph
- bd duplicate --of: mark issues as duplicates with auto-close
- bd supersede --with: mark issues as superseded with auto-close
- Hooks system: on_create, on_update, on_close, on_message in .beads/hooks/
- RPC protocol: added Sender, Ephemeral, RepliesTo fields to CreateArgs/UpdateArgs
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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