Mike Swanson 353ba6363c refactor(sync): share the sync lock with /scc and /checkpoint ...

Extract the per-machine concurrency lock from sync.sh into a sourceable
lib (.claude/scripts/sync-lock.sh) plus a `run <cmd>` wrapper that locks
the current repo (same lock-dir basename, so it mutually excludes with
sync.sh in the ClaudeTools repo and self-scopes in any project repo).
sync.sh now sources it (behavior identical — verified by review). /scc
routes its commit+push through the locked, rebase-safe sync.sh (and drops
the bare YYYY-MM-DD-session.md filename for the per-session-unique one).
/checkpoint now stages+commits atomically under the repo lock so a
concurrent session in a shared worktree can't be swept in. Closes the
remaining commit paths that bypassed the lock shipped in 6b0ce9a.

2026-06-05 19:13:40 -07:00

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