v4.6.0

v4.6.0 — Orchestrator cycle enforcement

Added

• graphstack cycle start / cycle enter-builder — board + STATE + BRIEF in one step
• Gate v3: role=builder required for code edits; Draft brief blocked; strict ship/review checks
• brief_utils.py shared helpers
• Doctor/validate: handoff sync warnings + hooks.json gate check

Changed

• graphstack.mdc v4.6: full activation checklist in alwaysApply rules
• ORCHESTRATOR.md: first user goal routes to Architect (no code on turn 1)
• Installer merges gate hooks into existing .cursor/hooks.json (no longer skips)