fix(reflection): per-section legacy filtering prevents resolved items from being revived (P1+P2)

- Add resolvedAt/resolvedBy/resolutionNote metadata to ReflectionItemMetadata
- Filter out resolved items from reflection loading (P1 fix)
- Per-section legacy filtering to prevent cross-section revival (P2 fix)

Author: jlin53882

src/reflection-item-store.ts

@@ -23,6 +23,12 @@ export interface ReflectionItemMetadata {
   baseWeight: number;
   quality: number;
   sourceReflectionPath?: string;
+  /** Unix timestamp when the item was marked resolved. Undefined = unresolved. */
+  resolvedAt?: number;
+  /** Agent ID that marked this item resolved. */
+  resolvedBy?: string;
+  /** Optional note explaining why the item was resolved. */
+  resolutionNote?: string;
 }
 
 export interface ReflectionItemPayload {

src/reflection-store.ts

@@ -252,8 +252,70 @@ export function loadAgentReflectionSlicesFromEntries(params: LoadReflectionSlice
   const itemRows = reflectionRows.filter(({ metadata }) => metadata.type === "memory-reflection-item");
   const legacyRows = reflectionRows.filter(({ metadata }) => metadata.type === "memory-reflection");
 
-  const invariantCandidates = buildInvariantCandidates(itemRows, legacyRows);
-  const derivedCandidates = buildDerivedCandidates(itemRows, legacyRows);
+  // [P1] Filter out resolved items — passive suppression for #447
+  // resolvedAt === undefined means unresolved (default)
+  const unresolvedItemRows = itemRows.filter(({ metadata }) => metadata.resolvedAt === undefined);
+  const resolvedItemRows = itemRows.filter(({ metadata }) => metadata.resolvedAt !== undefined);
+
+  const hasItemRows = itemRows.length > 0;
+  const hasLegacyRows = legacyRows.length > 0;
+
+  // Collect normalized text of resolved items so we can detect whether legacy
+  // rows are pure duplicates of already-resolved content.
+  const resolvedInvariantTexts = new Set(
+    resolvedItemRows
+      .filter(({ metadata }) => metadata.itemKind === "invariant")
+      .flatMap(({ entry }) => sanitizeInjectableReflectionLines([entry.text]))
+      .map((line) => normalizeReflectionLineForAggregation(line))
+  );
+  const resolvedDerivedTexts = new Set(
+    resolvedItemRows
+      .filter(({ metadata }) => metadata.itemKind === "derived")
+      .flatMap(({ entry }) => sanitizeInjectableReflectionLines([entry.text]))
+      .map((line) => normalizeReflectionLineForAggregation(line))
+  );
+
+  // Check whether legacy rows add any content not already covered by resolved items.
+  const legacyHasUniqueInvariant = legacyRows.some(({ metadata }) =>
+    toStringArray(metadata.invariants).some(
+      (line) => !resolvedInvariantTexts.has(normalizeReflectionLineForAggregation(line))
+    )
+  );
+  const legacyHasUniqueDerived = legacyRows.some(({ metadata }) =>
+    toStringArray(metadata.derived).some(
+      (line) => !resolvedDerivedTexts.has(normalizeReflectionLineForAggregation(line))
+    )
+  );
+
+  // Suppress when:
+  // 1) there were item rows, all are resolved, and there are no legacy rows, OR
+  // 2) there were item rows, all are resolved, legacy rows exist BUT all of their
+  //    content duplicates already-resolved items (prevents legacy fallback from
+  //    reviving just-resolved advice — the P1 bug fixed here).
+  const shouldSuppress =
+    hasItemRows &&
+    unresolvedItemRows.length === 0 &&
+    (!hasLegacyRows || (!legacyHasUniqueInvariant && !legacyHasUniqueDerived));
+  if (shouldSuppress) {
+    return { invariants: [], derived: [] };
+  }
+
+  // [P2] Per-section legacy filtering: only pass legacy rows that have unique
+  // content for this specific section. Prevents resolved items in section A from being
+  // revived when section B has unique legacy content (cross-section legacy fallback bug).
+  const invariantLegacyRows = legacyRows.filter(({ metadata }) =>
+    toStringArray(metadata.invariants).some(
+      (line) => !resolvedInvariantTexts.has(normalizeReflectionLineForAggregation(line))
+    )
+  );
+  const derivedLegacyRows = legacyRows.filter(({ metadata }) =>
+    toStringArray(metadata.derived).some(
+      (line) => !resolvedDerivedTexts.has(normalizeReflectionLineForAggregation(line))
+    )
+  );
+
+  const invariantCandidates = buildInvariantCandidates(unresolvedItemRows, invariantLegacyRows);
+  const derivedCandidates = buildDerivedCandidates(unresolvedItemRows, derivedLegacyRows);
 
   const invariants = rankReflectionLines(invariantCandidates, {
     now,