Skip to content

C1.7 g.X - AutoCal weak-signal FieldHeavy delta-aware stopgap (Option A)

Intent

  • Prevent weak-signal FieldHeavy AutoCal recommendations from forcing a prune flip (prune_enabled:false) that is safe only on baseline_prune_off but causes large overhead when applied as a delta to common prune_on_* baselines.
  • Make the smallest harness-only change with deterministic behavior and no RenderHealth gating changes.

Codex Summary

Implemented Option A only: RecommendationEngine now emits no prune delta for weak-signal FieldHeavy instead of forcing prune_off.

What changed - Weak-signal FieldHeavy branch no longer sets preset.enable_tlas_prune. - Branch now returns a no-op prune delta with updated note: - fieldheavy:weak_signal:no_prune_delta

Why this is the smallest safe move - It avoids cross-baseline prune flips entirely for the weak-signal case. - It preserves probe/archetype detection and preset generation determinism. - It avoids widening acceptance-policy scope or matrix aggregation changes in this patch.

Diff Summary

  • Files changed:
  • RendererCore/Testing/RecommendationEngine.cs

  • Docs/CalibRoadmap/PatchLogs/C1_7_g_X.md

  • RendererCore/Testing/RecommendationEngine.cs

  • Weak-signal FieldHeavy preset branch now returns no prune delta and updates note text from prune_off to no_prune_delta. Anchors: RendererCore/Testing/RecommendationEngine.cs:28, RendererCore/Testing/RecommendationEngine.cs:30

Behavior/Trust Impact

  • Harness-only AutoCal preset recommendation behavior changes for one case:
  • FieldHeavy + weak signal no longer recommends a prune flip.
  • No renderer hot-loop changes.
  • No RenderHealth gating changes.

Validation

  • dotnet build "Physical Light and Camera Units.sln" -c Debug -> pass (warnings only)

Recommendation (next step)

  • Option B is the stronger long-term fix because it enforces delta-budget safety at acceptance time across the baseline matrix.
  • Option C is a narrower harness workaround but risks masking cross-baseline fragility rather than preventing it.

Update - Option B (implemented)

Implemented Option B with a minimal harness-only matrix aggregation path for prune-delta presets.

What changed - Acceptance now aggregates shadow-eval pair outcomes across the matrix when the preset contains a prune delta (enable_tlas_prune.HasValue). - Per-pair accept decisions are emitted as defer with reason=matrix_pending while aggregation is in progress. - A final existing-format AutoCalDecision is emitted at matrix end using aggregate acceptance policy: - accept_matrix - matrix_pair_reject - matrix_pair_defer - matrix_overhead_exceeds_max

Notes - No renderer hot-loop or RenderHealth gating changes. - No new log format was added; this reuses existing AutoCalDecision lines and emits one final matrix-level decision when aggregation is active. - Aggregation is enabled conservatively for any preset with a prune delta (not only weak-signal FieldHeavy).

Diff Summary (Option B)

  • Files changed:
  • RendererCore/Testing/CalibrationAcceptancePolicy.cs

  • RendererCore/Testing/RenderTestRunner.cs

  • RendererCore/Testing/CalibrationAcceptancePolicy.cs

  • Added matrix-level shadow-eval input + finalization helpers (CalibrationShadowEvalMatrixInput, DecideFromShadowEvalMatrix(...)). Anchors: RendererCore/Testing/CalibrationAcceptancePolicy.cs:47, RendererCore/Testing/CalibrationAcceptancePolicy.cs:149

  • Added matrix outcome reasons (matrix_pair_reject, matrix_pair_defer, accept_matrix). Anchors: RendererCore/Testing/CalibrationAcceptancePolicy.cs:179, RendererCore/Testing/CalibrationAcceptancePolicy.cs:186, RendererCore/Testing/CalibrationAcceptancePolicy.cs:204

  • RendererCore/Testing/RenderTestRunner.cs

  • Enable matrix aggregation only for prune-delta presets (preset.enable_tlas_prune.HasValue). Anchor: RendererCore/Testing/RenderTestRunner.cs:690
  • Accumulate per-pair shadow decisions and coerce interim pair accepts to matrix_pending (defer) while preserving existing per-pair logs. Anchors: RendererCore/Testing/RenderTestRunner.cs:826, RendererCore/Testing/RenderTestRunner.cs:880, RendererCore/Testing/RenderTestRunner.cs:959, RendererCore/Testing/RenderTestRunner.cs:995
  • Emit final matrix-level decision at matrix shutdown before state reset. Anchor: RendererCore/Testing/RenderTestRunner.cs:1461

Validation (Option B)

  • dotnet build "Physical Light and Camera Units.sln" -c Debug -> pass (warnings only)