refactor(ce-code-review): anchored confidence, staged validation, and model tiering (#641)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

plugins/compound-engineering/skills/ce-code-review/references/walkthrough.md

@@ -10,7 +10,7 @@ Interactive mode only.
 
 The walk-through receives, from the orchestrator:
 
-- The merged findings list in severity order (P0 → P1 → P2 → P3), filtered to `gated_auto` and `manual` findings that survived the Stage 5 confidence gate. Advisory findings are included when they were surfaced to this phase (advisory findings normally live in the report-only queue, but when the review flow routes them here for acknowledgment they take the advisory variant below).
+- The merged findings list in severity order (P0 → P1 → P2 → P3), filtered to `gated_auto` and `manual` findings that survived the Stage 5 anchor gate (anchor 75+, with P0 escape at anchor 50). Advisory findings are included when they were surfaced to this phase (advisory findings normally live in the report-only queue, but when the review flow routes them here for acknowledgment they take the advisory variant below).
 - The cached tracker-detection tuple from `tracker-defer.md` (`{ tracker_name, confidence, named_sink_available, any_sink_available }`). `any_sink_available` determines whether the Defer option is offered; `named_sink_available` + `confidence` determine whether the label names the tracker inline.
 - The run id for artifact lookups.
 
@@ -156,7 +156,7 @@ For each finding's answer:
 - **Acknowledge — mark as reviewed** (advisory variant) — record Acknowledge in the in-memory decision list. Advance to the next finding. No side effects.
 - **Defer — file a [TRACKER] ticket** — invoke the tracker-defer flow from `tracker-defer.md`. The walk-through's position indicator stays on the current finding during any failure-path sub-question (Retry / Fall back / Convert to Skip). On success, record the tracker URL / reference in the in-memory decision list and advance. On conversion-to-Skip from the failure path, advance with the failure noted in the completion report.
 - **Skip — don't apply, don't track** — record Skip in the in-memory decision list. Advance. No side effects.
-- **LFG the rest — apply the agent's best judgment to this and remaining findings** — exit the walk-through loop. Dispatch the bulk preview from `bulk-preview.md`, scoped to the current finding and everything not yet decided. The preview header reports the count of already-decided findings ("K already decided"). If the user picks `Cancel` from the preview, return to the current finding's per-finding question (not to the routing question). If the user picks `Proceed`, execute the plan per `bulk-preview.md` — Apply findings join the in-memory Apply set with the ones the user already picked, Defer findings route through `tracker-defer.md`, Skip / Acknowledge no-op — then proceed to end-of-walk-through dispatch.
+- **LFG the rest — apply the agent's best judgment to this and remaining findings** — exit the walk-through loop. Before dispatching the bulk preview, run Stage 5b on the remaining action set (the current finding plus any not yet decided) using the same gate as LFG routing (option B): validator template at `references/validator-template.md`, 15-finding cap, parallel per-finding dispatch. Findings Stage 5b rejects are dropped from the remaining set. Then dispatch the bulk preview from `bulk-preview.md` scoped to the Stage 5b-validated survivors. The preview header reports the count of already-decided findings ("K already decided"). If the user picks `Cancel` from the preview, return to the current finding's per-finding question (not to the routing question). If the user picks `Proceed`, execute the plan per `bulk-preview.md` — Apply findings join the in-memory Apply set with the ones the user already picked, Defer findings route through `tracker-defer.md`, Skip / Acknowledge no-op — then proceed to end-of-walk-through dispatch.
 
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