feat(P03): rubric scoring engine + calibration (Wave 2)
Task 3-2-01: prompts/grading.py (grader-v1 rubric, 4 criteria x 0-4 anchors, a-4 churn
advisory) + grading/engine.py — GradingEngine with the BINDING G-4 gate-first ordering
(INCOMPLETE_FLOODED -> gaps -> empty; LLM unreachable for gated traces; first-class
UNGRADABLE_* GradeRecords, model="none" provenance), digest-only prompts (D-028; planted
marker proven absent from all provider messages), D-020 reused via one module-direct
import of agents/structured (grep-auditable). RubricScore validated per-criterion.
Task 3-2-02: corpus/trace_fixtures.py (D-021-aligned archetype IDs) + ordering-contract
calibration test (strong>=lazy on process; strong>struggling on correctness; digest
feature separation asserted deterministically).
54 grading tests green; suite 272 green; ruff clean.
---ci---
phase: 3
milestone: v0.3
status: execute
requirements: {covered: [REQ-3-004], partial: []}
---/ci---
CIAgent
1a46606827