- Replace rmp-serde with bincode 1.x in Cargo.toml
- Update store.rs serialization/deserialization and ID hashing
- Rename model.rs helpers from to_msgpack/from_msgpack to to_bytes/from_bytes
- Consolidate MsgPack/MsgPackDecode error variants into single Bincode variant
- Remove skip_serializing_if on ssh_signature (incompatible with bincode)
- Update all documentation to reflect bincode storage format
Add a centralized ui module with Arc's visual identity: colored commit
IDs (magenta), bookmarks (cyan), tags (yellow), status symbols, and
diff highlighting. Update all command output and tests accordingly.
- Add ssh-key crate dependency for SSHSIG format signing/verification
- Add signing module with sign, verify, and fingerprint functions
- Add ssh_signature field to Commit model (optional, backward-compatible)
- Integrate signing into commit flow (signs when user.key is configured)
- Show [signed] tag in log output for signed commits
- Show signature fingerprint and verification status in show output
- Gracefully degrade if key is missing/invalid (warns, commits unsigned)
- Add openssh to nix flake nativeCheckInputs for ssh-keygen in tests
- Add comprehensive signing tests covering signed/unsigned commits
- Add commit command with auto-change detection (no staging area)
- Add status command showing added/modified/deleted files
- Add diff command with unified diff output
- Store commits as ZSTD-compressed MessagePack in .arc/commits/<id>.zst
- Generate commit/delta IDs via SHA-256 hashing
- Reconstruct committed state by replaying delta chains
- Add ignore pattern matching with glob support (.arcignore/.ignore)
- Always exclude .arc/ directory from worktree scanning
- Update HEAD and bookmark refs on commit
- Add NothingToCommit error variant
- Add zstd, sha2, hex dependencies
- Add 30 new tests across commit, status, diff, and tracking
