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Author SHA1 Message Date
root
622e124b8f phase 2: matrix.downgrade reads WeakModels from config 
migrate the strong-model auto-downgrade gate from a hardcoded weak
list to cfg.Models.WeakModels. backward compatible: existing API
preserved, callers that don't migrate keep using DefaultWeakModels.

changes:
- internal/matrix/downgrade.go: split IsWeakModel into rule-based
  base (`:free` suffix/infix) + literal-list lookup. New
  IsWeakModelInList(model, list) takes the config-supplied list.
  DowngradeInput grows a WeakModels field; nil falls back to
  DefaultWeakModels (preserves pre-phase-2 behavior).
- internal/workflow/modes.go: add MatrixDowngradeWithWeakList(list)
  factory mirroring MatrixSearch's pattern. Plain MatrixDowngrade
  kept for backward compat.
- cmd/matrixd/main.go: handlers struct holds weakModels populated
  from cfg.Models.WeakModels at startup; handleDowngrade threads it
  into every DowngradeInput.
- cmd/observerd/main.go: registerBuiltinModes accepts weakModels
  and uses the factory variant. observerd reads cfg.Models.WeakModels
  in main().

end-to-end verified: downgrade + matrix + observer + workflow smokes
all pass. Existing TestMaybeDowngrade_TruthTable + TestIsWeakModel
unchanged (backward compat). Two new tests cover the config path:
- TestIsWeakModelInList — covers rule + literal + empty + nil
- TestMaybeDowngrade_WithConfigList — verifies cfg list overrides
  default

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
 2026-04-29 23:52:18 -05:00
root
3968ec8a7b matrix: strong-model downgrade gate — SPEC §3.4 component 4 of 5 
Pure-Go port of mode.rs::execute's pass5 downgrade gate (Rust
2026-04-26). Adds POST /v1/matrix/downgrade endpoint via matrixd.

The gate captures the pass5 finding: composing matrix corpora into
codereview_lakehouse on a strong model LOST 5/5 head-to-head reps
against matrix-free codereview_isolation on grok-4.1-fast (p=0.031).
Strong models have enough native capacity that bug fingerprints +
adversarial framing + file content carry them; matrix chunks
displace depth-of-analysis.

Logic (matches Rust mode.rs:614-632):
  if mode == codereview_lakehouse
     && !forced_mode
     && !LH_FORCE_FULL_ENRICHMENT
     && !is_weak_model(model)
  → flip to codereview_isolation, record downgraded_from

is_weak_model captures the empirical weak-list:
  - `:free` suffix or `:free/` infix (OpenRouter free tier)
  - qwen3.5:latest, qwen3:latest (local last-resort rungs)
  - everything else → strong by default

Tests:
  - 3 unit tests in internal/matrix/downgrade_test.go: IsWeakModel
    coverage, MaybeDowngrade truth table (5 rows), forced-mode
    precedence (forced beats every other bypass)
  - scripts/downgrade_smoke.sh: 6 assertions through gateway covering
    all 5 truth-table rows + empty-mode 400

14-smoke regression sweep all green (D1-D6, G1, G1P, G2,
storaged_cap, pathway, matrix, relevance, downgrade).

SPEC §3.4 progress: 4 of 5 components shipped (corpus builders,
multi-corpus retrieve+merge, relevance filter, downgrade gate).
Last component is learning-loop integration.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
 2026-04-29 19:17:55 -05:00