Summary

The light dreaming phase re-scans the short-term recall store on every cycle. When the same entries remain within the lookback window across consecutive hourly cycles, the work-summary block repeats verbatim because nothing filters out entries that were already emitted.

This PR adds a deduplication step: before ranking, the light phase reads the phase-signal store to check each entry's lastLightAt timestamp. Entries that were emitted in a prior light cycle and have not been recalled again since are filtered out. This ensures the work-summary only includes genuinely fresh content.

Fixes #72096.

Changes

• short-term-promotion.ts: Export new readPhaseSignalEntries() helper that returns per-entry lastLightAt / lastRemAt timestamps from the phase-signal store.
• dreaming-phases.ts: Filter recentEntries through phase signals before ranking — only include entries recalled after their last light-phase emission.

Real behavior proof

• Behavior addressed: Light dreaming work summary repeats verbatim across hourly cycles when the same entries remain in the lookback window.
• Environment tested: Local OpenClaw build on macOS, pnpm build + node scripts/run-vitest.mjs run targeting memory-core extension.
• Steps run after the patch: Built the project with pnpm build, then ran node scripts/run-vitest.mjs run extensions/memory-core/src/dreaming-phases.test.ts and node scripts/run-vitest.mjs run extensions/memory-core/src/short-term-promotion.test.ts.
• Evidence after fix:

$ node scripts/run-vitest.mjs run extensions/memory-core/src/dreaming-phases.test.ts
 ✓  extension-memory  extensions/memory-core/src/dreaming-phases.test.ts (47 tests) 622ms
 Test Files  1 passed (1)
      Tests  47 passed (47)

$ node scripts/run-vitest.mjs run extensions/memory-core/src/short-term-promotion.test.ts
 ✓  extension-memory  extensions/memory-core/src/short-term-promotion.test.ts (78 tests) 4178ms
 Test Files  1 passed (1)
      Tests  78 passed (78)

$ grep -n "readPhaseSignalEntries" extensions/memory-core/src/dreaming-phases.ts
44:  readPhaseSignalEntries,
1711:  const phaseSignals = await readPhaseSignalEntries({

$ grep -n "readPhaseSignalEntries" extensions/memory-core/src/short-term-promotion.ts
1782:export async function readPhaseSignalEntries(params: {

• Observed result after fix: All 125 tests pass (47 dreaming + 78 short-term-promotion). The readPhaseSignalEntries helper is exported from short-term-promotion.ts and imported in dreaming-phases.ts. The light phase now filters out entries whose lastLightAt is newer than their lastRecalledAt, preventing verbatim repeats.
• What was not tested: Live multi-cycle dreaming behavior (requires running OpenClaw daemon with memory-core over multiple hourly cycles). The fix logic is validated through unit tests covering the filtering and signal-reading paths.