chore(tasks): close task-20260222-001

- WHY: complete Stage 3 lifecycle transition for TASK-001
- WHAT: move task from active to done and append completion metadata
- RULE: apply task folder behavior from repository workflow directives

.tasks/done/TASK-20260222-001.md

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+# Stage 1 Task
+
+## 0. Header
+- Task ID: TASK-20260222-001
+- Title: Consolidate identity abstractions inside thalos-service plan
+- Status: Planned
+- Priority: P1
+- Target Repo: thalos-service
+- Target Branch: feature/thalos-service-001
+- Related Master Plan: plan/master-stage1-structural-normalization-2026-02-22.md
+- Related Mini Plan: plan/thalos-service-mini-plan.md
+
+## 1. Goal (What and Why)
+### What
+- Map legacy building block abstractions into service-owned modules
+- Document explicit prohibition of Blueprint ownership for identity abstractions
+
+### Why
+- Identity-specific abstractions must remain strictly within Thalos
+
+## 2. Scope
+### In Scope
+- Identity abstraction ownership and consolidation map
+
+### Out of Scope
+- Moving identity abstractions into Blueprint
+
+## 3. Constraints (Non-Negotiable)
+- Stage 1 planning only. No implementation changes.
+- Do not modify any file under legacy.
+- Do not run repo provisioning or CI generation.
+- Follow the approved architecture boundaries and protocol policy.
+- Keep identity abstractions inside Thalos repositories.
+
+## 4. Documentation Requirement
+- [ ] Capture planning decisions clearly for handoff.
+- [ ] Identify documentation and diagram updates expected in later stages.
+
+## 5. Context
+- This task derives from plan/thalos-service-mini-plan.md.
+- This task must remain decision-focused and implementation-ready.
+
+## 6. Proposed Approach
+- Define module ownership and anti-leakage rules for identity abstractions
+
+## 7. Execution Steps
+1. Review legacy evidence relevant to this task scope.
+2. Define target boundary decisions and contract implications.
+3. Record risks, dependencies, and compatibility notes.
+4. Produce clear handoff guidance for implementation stage.
+
+## 8. Acceptance Criteria
+- [ ] Decisions are explicit, scoped, and actionable.
+- [ ] Ownership boundaries are unambiguous.
+- [ ] Protocol policy alignment is explicit where applicable.
+- [ ] No forbidden Stage 1 actions were performed.
+
+## 9. Testing Plan
+### Unit Tests
+- Not applicable for Stage 1 planning artifacts.
+
+### Validation
+- Ensure consistency with master plan and mini plan.
+
+## 10. Definition of Done
+- [ ] Task content is complete and consistent with other task files.
+- [ ] References to master and mini plans are correct.
+- [ ] Handoff notes are clear enough for immediate implementation.
+
+## 11. Risks and Questions
+- Risk: boundary drift during implementation.
+- Mitigation: enforce repo intent metadata and mini plan ownership.
+
+## 12. Handoff Notes
+- Preserve approved constraints exactly.
+- Implementers should execute this task only after reading master and mini plans.
+
+END OF TASK
+
+## 13. Completion Metadata
+- Completion Stage: Stage 3 Execution
+- Completed On: 2026-02-22
+- Completed By: Codex
+- Completion Branch: feature/thalos-service-001
+- Completion Commit: 9f1790e
+- Lifecycle State: done