google/gemini-flash-2.0 is not a valid OpenRouter model ID (segments reversed).
Every rerank and FunJudge call fails with HTTP 400 when REASONING_PROVIDER=openrouter
and LAST30DAYS_RERANK_MODEL is not explicitly pinned, silently falling back to
local-score heuristics.
OpenRouter error body:
{"message":"google/gemini-flash-2.0 is not a valid model ID","code":400}
Switching to google/gemini-3.1-flash-lite-preview, which matches the
GEMINI_FLASH_LITE constant already used by the native Gemini provider on
line 12 of the same file. This makes the Gemini and OpenRouter providers
consistent and avoids a future divergence.
Validated with /last30days 'Claude Opus 4.7' --quick:
- Rerank/FunJudge HTTP 400 errors: 1 per run -> 0
- 'Why: fallback-local-score' markers in output: every cluster -> 0
- LLM-generated 'Why:' reasoning lines: 0 -> 11
The Gemini 3.1 Flash Lite preview model is being discontinued on
May 25, 2026. Per Google's GA announcement, the underlying model
architecture is identical and only the model identifier needs to
be updated from `gemini-3.1-flash-lite-preview` to
`gemini-3.1-flash-lite`.
Also relaxes the `_require_gemini_31_preview` guard to accept any
`gemini-3.1-*` identifier (renamed to `_require_gemini_31`), so the
GA name and the still-preview `gemini-3.1-pro-preview` both pass.
1. N+1 queries in store.store_findings()
The old loop ran one SELECT per finding to check existence, then one
INSERT or UPDATE. 100 findings cost 200 serial SQLite roundtrips.
Now: one batch SELECT with WHERE source_url IN (...) builds a lookup
dict, then executemany() handles all inserts and updates. Query count
stays constant regardless of batch size. Benchmark on 500 findings:
~30ms to ~20ms; gap widens on slower storage.
2. O(n^2) source_items dedup in fusion.weighted_rrf()
Merging an item into an existing candidate ran any(existing.source ==
... for existing in candidate.source_items), linearly scanning a list
that grew with each merge. At 40 candidates with 20 source_items each,
fusion went quadratic. Now tracks (source, item_id) tuples in a
per-candidate set for O(1) lookup. The source_items list itself is
unchanged since other code iterates it.
3. Dead code removal
- providers.GeminiClient.ground_search() and .url_context_json(): zero
callers. Deleted.
- render._top_comment_excerpt(): zero callers. Deleted.
- env.is_reddit_available(): one-line wrapper around get_reddit_source.
Callers can check get_reddit_source(config) is not None directly.
Trevin Chow