docs(dox): build out the DOX AGENTS.md hierarchy

Root Child DOX Index assembled, plus a per-module AGENTS.md across the tree
(core/*, infrastructure/*, apps/*, testing/*, and docs/examples/frontend/etc),
each following the DOX section shape: Purpose, Ownership, Local Contracts,
Work Guidance, Verification, Child DOX Index.

core/critique/AGENTS.md

@@ -0,0 +1,31 @@
+# core/critique — AGENTS.md
+
+## Purpose
+
+Critic calibration tracking: projects critic outcome history into `CriticCalibrationState` so the kernel can adapt critic weighting over time.
+
+## Ownership
+
+CORREX kernel team.
+
+## Local Contracts
+
+- `CriticCalibrationState` — accumulated calibration data rebuilt from `CritiqueCalibrationEvents` (defined in `core:events`).
+- `CriticCalibrationReducer` / `DefaultCriticCalibrationReducer` — standard reducer, only `state.copy(...)`.
+- `CriticCalibrationProjector` — wraps the reducer as `Projection<CriticCalibrationState>`.
+- No repository class here; callers use `EventReplayer<CriticCalibrationState>` directly or wire their own.
+
+## Work Guidance
+
+- Follow the standard Events→State→Reducer→Projector pattern (see `core/AGENTS.md`).
+- No promotion logic in this module — calibration data is read by `core:kernel`; decisions are made there.
+
+## Verification
+
+```bash
+./gradlew :core:critique:test --rerun-tasks
+```
+
+## Child DOX Index
+
+No child AGENTS.md (leaf module).