SessionStart now warns (>=7d, warn-only) when the persistent trend store's
newest capture is stale, firing ONLY when the store already holds captures
(a never-scanned user is never nagged). Neutral wording — "scan for trends"
hits trend-spotter's own trigger; no hardcoded beat (de-niche invariant).
- store.ts: newestCaptureDate() — pure max-capturedAt staleness signal (SSOT)
- cli.ts: status [--json] subcommand (count + newest + daysStale)
- session-start.mjs: trendsNewestCapture() reads trends.json as raw JSON
(no tsx spawn at session start) + the reminder line, beside import-staleness
- tests: +3 store tests (newestCaptureDate) + hook subprocess test (3 cases:
>=7d fires, <7d silent, absent/empty silent + no crash)
- test-runner.sh: trends floor 21->24
Verified: trends 24/24 · all hook tests 131/131 · gate 89/0/0 · real render
confirms "Trend signals are N days old. Scan for trends…".
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RigJBiRFNtFZKCz21qNbQ4
[skip-docs] internal plumbing — standalone store, no command/agent/pipeline
surface change until slice 2 wiring (mirrors specifics-bank slice 2). CLAUDE.md
"Telling"/counts untouched; lint stays 84/0/0.
Research-engine §5 (foundation layer) slice 1: the deterministic STORE half of
the persistent trend store — a topic-tagged, provenance-bearing inventory of
trend signals captured over time, so the research engine accumulates HISTORY
instead of starting amnesiac each session. Trend-side twin of the lived-specifics
bank (same store/dedup/query discipline; dedupe key is normalized title+URL, not
free-text content). Generic by architecture: nothing niche-specific lives here —
topics and source are free-form, decided upstream via config/profile.
scripts/trends/ (sibling to specifics-bank, same tsx convention):
- src/types.ts — TrendRecord/TrendStore schema (schemaVersion 1), minimal
generic core: title, url, source, capturedAt, topics[], optional summary
- src/store.ts — pure store: normalizeField, title+url-hash id (= dedupe key),
load/save, addTrend (dedupe + topic union on re-capture; first-sighting
source/capturedAt kept), queryByTopic (overlap-ranked then recency), history
(time-scoped, since/limit)
- src/cli.ts — add / query / list; default store under
${LINKEDIN_STUDIO_DATA:-~/.claude/linkedin-studio}/trends/ so trend history
survives plugin upgrades/reinstalls (M0 data-path seam)
- tests/store.test.ts — 21/21 green; tsc clean
- README + .gitignore for node_modules/build
Capture/scoring agent + MCP-first routing land in slice 2; the CI binding guard
is deferred to wiring, mirroring the specifics-bank timeline.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
