docs: migrate project memory governance

.project-docs/50-evidence/evidence-index.md

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+# Evidence Index
+
+Use this index for searchable, traceable evidence records.
+
+| Date | Topic | Status | Source | Detail |
+|---|---|---|---|---|
+| 2026-08-28 | Legacy project memory migration | Verified byte-for-byte | [Archive index](../../archive/project-history/2026-08-28/README.md) | Final root planning files were hashed, copied, and compared before retirement. |
+| 2026-08-28 | Current release capability and real-validation boundary | Current integrated evidence | [Lifecycle release gate](../../agent设计规范/test-fixtures/lwlt-lifecycle/release-gate.md) | Defines active conclusions and links immutable evidence. |
+| 2026-08-28 | Release artifact hashes and sources | Machine-verified | [Release manifest](../../dist/release-manifest.json) | Seven current artifacts and their source/hash metadata. |
+| 2026-08-28 | AgentBus reconnect and runtime switch | Verified at observation time; time-sensitive | [Archived legacy progress](../../archive/project-history/2026-08-28/legacy-planning-with-files-progress-final.md) | Repeated 4/4-ready samples after authorized restart; live status must be rechecked when needed. |
+
+## When To Add Evidence
+
+Add a topic file when a task depends on logs, commits, test output, external docs, bug reproduction, experiments, or postmortem-level reasoning.
+
+Keep task progress in `30-worklog/`; keep reusable workflow lessons in `60-reflection/`.

.project-docs/50-evidence/topic-template.md

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+# Evidence Topic: {short title}
+
+## Metadata
+
+- Date:
+- Status: Active | Resolved | Superseded | Stale
+- Scope:
+- Confidence: Fact | Inference | Hypothesis
+- Source:
+- Last verified:
+- Stale trigger:
+
+## Question
+
+What needed evidence?
+
+## Evidence
+
+- Commit:
+- Files:
+- Commands:
+- Logs:
+- External source:
+
+## Finding
+
+What does the evidence support?
+
+## Impact
+
+What future planning or implementation should this affect?
+
+## Open Items
+
+-