Lift the research engine's deterministic core out of agents/trend-spotter.md prose
into pure, tested TypeScript under scripts/trends/, behind a CLI seam the agent calls.
- B1 src/item.ts: TrendItem ingress envelope + normalizeItem/normalizeItems
(required-field validation, topic normalize+dedupe via store's normalizeField,
optional publishedAt ISO-validate). No id (store derives it); no store bridge
(capturedAt injection is R2).
- B2 src/score.ts: per-mode weight consts mirroring the SSOT
(references/trend-scoring-modes.md), composite (weighted sum, [1,10] guard),
band (5-band map + exact SSOT action strings), triage (keep>=threshold, rank desc,
annotate composite+band). Owns ONLY the arithmetic; the five judgment scores stay
model-side.
- CLI normalize/score: JSON payload on STDIN, JSON to stdout (the existing --json
output toggle is untouched); exit 2 on bad invocation, 0 otherwise.
- Wire trend-spotter.md to name 'src/cli.ts score' as the deterministic-step owner
(prose pointer; the agent still supplies the five scores). Domain-general.
- Gate: TRENDS_TESTS_FLOOR 24->62; new unconditional Section 16g (score.ts both-mode
weight-sets + trend-spotter scorer-pointer + non-vacuity self-test);
ASSERT_BASELINE_FLOOR 84->87.
TDD: logic-RED proven (33/34 item+score fail on assertions, not module-not-found),
then GREEN (trends suite 62/62); CLI RED 2/4 -> GREEN 4/4. Full gate 102/0/0.
No store-schema change (SCHEMA_VERSION stays 1).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VmHCQjJHUyWwxGAVVjNLgp
Kjell Tore Guttormsen
24775f4493