gentle-pi v0.3.4

gentle-pi v0.3.4

SDD/OpenSpec sync support

• Added first-class sdd-sync phase between verify and archive.
• Added file-backed OpenSpec delta helpers for ADDED, MODIFIED, and REMOVED requirements.
• Added guardrails for active same-domain spec collisions, legacy flat specs, and destructive deltas.
• Updated SDD archive semantics to require verified sync before archive, with archive-time sync only as explicit fallback.
• Documented the OpenSpec artifact model and improved README flow diagrams.

Safety and packaging

• /gentle-ai:status now reports stale or missing installed .pi SDD assets and points to explicit force refresh.
• Package verification now checks that sdd-sync is included.
• Added runtime harness coverage for sdd-sync installation.

Validation

• pnpm test passed.
• pnpm run prepack passed.
• npm pack --dry-run confirmed gentle-pi@0.3.4 contents.