docs(openspec): backfill missing proposals

openspec/changes/improve-cross-platform-stability/tasks.md

@@ -0,0 +1,17 @@
+## 1. Scope and Planning Confirmation
+- [ ] 1.1 Review `proposal.md`.
+- [ ] 1.2 Finalize priority: capability probing vs version detection.
+- [ ] 1.3 Confirm this stage covers default runtime configuration path only.
+
+## 2. Implementation
+- [x] 2.1 Make write flow transactional (atomic).
+- [x] 2.2 Add DB lock retry and `busy_timeout`.
+- [x] 2.3 Add version-detection cache and lower-noise logs.
+- [x] 2.4 Add Windows fallback for version detection (`package.json`).
+- [x] 2.5 Split injection path by strategy pattern.
+- [x] 2.6 Add capability probing: prefer new format when new key is detected.
+
+## 3. Verification
+- [x] 3.1 Simulate SQLITE_BUSY/LOCKED retry behavior.
+- [x] 3.2 Verify fallback path for version-detection failure.
+- [x] 3.3 Verify capability-probing priority behavior.