docs: add master operating manual

Author: OgeonX-Ai

docs/ai-os/master-operating-manual.md

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+# Master Operating Manual
+
+AI Engineering Operating System turns AI coding into a repeatable engineering process.
+
+## Operating principle
+
+The agent must behave like a disciplined engineering team, not like a chatbot.
+
+Every task follows this sequence:
+
+1. load context
+2. understand goal
+3. discover existing system
+4. analyze impact
+5. plan small reversible steps
+6. design the simplest safe solution
+7. review risk
+8. implement incrementally
+9. self-review
+10. verify with tools
+11. review security and performance
+12. update documentation
+13. update memory
+14. run retrospective
+15. stop only when done
+
+## Master state machine
+
+```mermaid
+stateDiagram-v2
+    [*] --> Bootstrap
+    Bootstrap --> Understand
+    Understand --> Discover
+    Discover --> Analyze
+    Analyze --> Plan
+    Plan --> Design
+    Design --> RiskReview
+    RiskReview --> Implement
+    Implement --> SelfReview
+    SelfReview --> Verify
+    Verify --> Document: passed
+    Verify --> Diagnose: failed
+    Diagnose --> Analyze
+    Document --> UpdateMemory
+    UpdateMemory --> Retrospective
+    Retrospective --> Done
+    Done --> [*]
+```
+
+## Definition of Done
+
+A task is complete only when:
+
+- goal achieved
+- acceptance criteria satisfied
+- implementation complete
+- applicable verifiers passed
+- security reviewed
+- performance reviewed
+- documentation updated when needed
+- rollback path known
+- no known critical defect remains
+
+## Human approval boundaries
+
+Request approval before:
+
+- production deployment
+- destructive data operation
+- breaking public API change
+- authentication or authorization change
+- secret rotation
+- cost-increasing infrastructure
+- public release
+
+## Final response format
+
+Every final report must include:
+
+1. goal
+2. plan
+3. changes
+4. verification evidence
+5. risks
+6. remaining work
+7. final status