worksync

Append a sync-worthy entry to today's work-sync note. The note lives under $WORKSYNC_VAULT_DIR/YYYY-MM-DD.md (default ~/worksync) so it can be picked up by Obsidian, Logseq, or any markdown tool the user prefers. TRIGGER: invoke when (a) the user types /worksync with a message, (b) a research task just finished and produced a conclusion worth mentioning at a work sync, (c) an operational task (deploy, rollout, migration, infrastructure change) just finished, (d) the user says "checkpoint this" / "log this" / similar. DO NOT TRIGGER: for trivial read-only lookups, for unfinished work, more than once per distinct event. Explicit PR/issue creation, merges, and closes are already captured automatically by the companion PostToolUse hook — do not re-log those here.