Agentic SDLC Spec Kit v0.0.89

Merged upstream v0.1.13 with extension hook support.

What's New

Merged from Upstream (spec-kit 0.1.13)

• Extension Hook Support: Added before/after hooks for tasks and implement commands
  • before_tasks hook: Execute extensions before task generation
  • after_tasks hook: Execute extensions after task generation
  • before_implement hook: Execute extensions before implementation
  • after_implement hook: Execute extensions after implementation
  • Supports both optional and mandatory hooks

Documentation Updates

• Updated Antigravity link to correct URL (antigravity.google)
• Added Antigravity initialization example
• Added generic agent initialization example

Preserved Fork Features

• Mode detection (Build/Spec modes)
• Dual execution loop with SYNC/ASYNC classification
• TDD workflow integration
• Risk-based test generation
• Issue tracker integration

Full Changelog: agentic-sdlc-v0.0.88...agentic-sdlc-v0.0.89