Update decomposition skill documentation and templates; remove obsolete feature specification and initial structure templates. Enhance task decomposition descriptions and adjust directory paths for project documentation.

.cursor/skills/plan/templates/resilience-tests.md

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+# Resilience Tests Template
+
+Save as `DOCUMENT_DIR/tests/resilience-tests.md`.
+
+---
+
+```markdown
+# Resilience Tests
+
+### NFT-RES-01: [Test Name]
+
+**Summary**: [What failure/recovery scenario this validates]
+**Traces to**: AC-[ID]
+
+**Preconditions**:
+- [System state before fault injection]
+
+**Fault injection**:
+- [What fault is introduced — process kill, network partition, invalid input sequence, etc.]
+
+**Steps**:
+
+| Step | Action | Expected Behavior |
+|------|--------|------------------|
+| 1 | [inject fault] | [system behavior during fault] |
+| 2 | [observe recovery] | [system behavior after recovery] |
+
+**Pass criteria**: [recovery time, data integrity, continued operation]
+```
+
+---
+
+## Guidance Notes
+
+- Resilience tests must define both the fault and the expected recovery — not just "system should recover."
+- Include specific recovery time expectations and data integrity checks.
+- Test both graceful degradation (partial failure) and full recovery scenarios.