v0.5.2 — watcher leak fix + semantic claim dedupe

Fixed

• Unbounded launchd watcher accumulation. MCP boot no longer registers a permanent KeepAlive agent for ephemeral/per-session dirs (~/.claude/homunculus/*, .cursor/worktrees/*, plugins/cache/*). New prune_stale runs on every bootstrap and removes agents whose target dir is gone or ephemeral, self-healing existing cruft. (launchd-only for now; systemd/schtasks GC is a follow-up.)
• Graceful watcher teardown. MCP server now stops the watcher via atexit + SIGTERM so the watchdog Observer flushes and joins instead of dying mid-debounce.

Added

• Semantic dedupe of near-duplicate claims. Paraphrastic claims (cosine ≥ CLAIMS_SEMANTIC_DEDUP_THRESHOLD, default 0.90) collapse into the closest open claim instead of inserting duplicate rows. Set ≥ 1.0 to disable.

Also includes prior untagged work: Cursor harness integration + installer improvements.

Update: code-memory update