1 files changed, 18 insertions, 18 deletions
diff --git a/src/gap_pipeline/pipeline.py b/src/gap_pipeline/pipeline.py
index 307ba81..76ae722 100644
--- a/src/gap_pipeline/pipeline.py
+++ b/src/gap_pipeline/pipeline.py
@@ -15,6 +15,7 @@ from .models import (
     KernelPlan,
     KernelRunResult,
     ModelCallRecord,
+    ProofPlanDAG,
 )
 from .prompts import (
     FIX_SYSTEM_PROMPT,
@@ -91,7 +92,10 @@ class KernelPipeline:
         )
         return response.data
 
-    async def extract_plan(self, item: CanonicalItem) -> KernelPlan:
+    async def extract_plan(
+        self,
+        item: CanonicalItem,
+    ) -> tuple[KernelPlan, ProofPlanDAG]:
         request_id = f"{item.item_id}.plan"
         payload = await self._call(
             self.proposer,
@@ -100,21 +104,10 @@ class KernelPipeline:
             user_prompt=kernel_plan_user(item),
         )
         plan = KernelPlan.model_validate(payload)
-        nodes = [
-            {
-                "node_id": f"n{index}",
-                "method_label": step,
-                "dependencies": [] if index == 1 else [f"n{index - 1}"],
-            }
-            for index, step in enumerate(plan.core_steps, start=1)
-        ]
+        dag = ProofPlanDAG.from_plan(plan)
         self.store.write_stage(
             "01_proof_dag",
-            {
-                "nodes": nodes,
-                "terminal_node_id": nodes[-1]["node_id"],
-                "construction": "ordered core_steps returned verbatim by Prompt-A",
-            },
+            dag,
             request_id=request_id,
         )
         self.store.write_stage(
@@ -130,7 +123,7 @@ class KernelPipeline:
             },
             request_id=request_id,
         )
-        return plan
+        return plan, dag
 
     async def generate_candidate(
         self,
@@ -163,6 +156,7 @@ class KernelPipeline:
         *,
         item: CanonicalItem,
         plan: KernelPlan,
+        dag: ProofPlanDAG,
         candidate: KernelCandidate,
         iteration: int,
         judge_id: int,
@@ -172,9 +166,9 @@ class KernelPipeline:
             judge,
             request_id=request_id,
             system_prompt=JUDGE_SYSTEM_PROMPT,
-            user_prompt=judge_user(item, plan, candidate),
+            user_prompt=judge_user(item, plan, dag, candidate),
         )
-        return JudgeVerdict.model_validate(payload)
+        return JudgeVerdict.model_validate(payload).validate_coverage(dag)
 
     async def _repair(
         self,
@@ -220,8 +214,10 @@ class KernelPipeline:
         *,
         item: CanonicalItem,
         plan: KernelPlan,
+        dag: ProofPlanDAG,
         candidate: KernelCandidate,
     ) -> KernelRunResult:
+        dag.validate_plan(plan)
         current = candidate
         iterations: list[IterationRecord] = []
         pass_streak = 0
@@ -236,6 +232,7 @@ class KernelPipeline:
                             judge,
                             item=item,
                             plan=plan,
+                            dag=dag,
                             candidate=current,
                             iteration=iteration,
                             judge_id=judge_id,
@@ -269,6 +266,7 @@ class KernelPipeline:
                     item_id=item.item_id,
                     status="accepted",
                     plan=plan,
+                    proof_dag=dag,
                     accepted_candidate=current,
                     iterations=iterations,
                     accepted_candidate_sha256=current_sha,
@@ -288,6 +286,7 @@ class KernelPipeline:
             item_id=item.item_id,
             status="rejected",
             plan=plan,
+            proof_dag=dag,
             iterations=iterations,
             rejection_reason="no two consecutive unanimous rounds within T=15",
         )
@@ -297,10 +296,11 @@ class KernelPipeline:
     async def run(self, item: CanonicalItem) -> KernelRunResult:
         self.store.write_input(item)
         self.store.write_config(self.config)
-        plan = await self.extract_plan(item)
+        plan, dag = await self.extract_plan(item)
         candidate = await self.generate_candidate(item, plan)
         return await self.verify_candidate(
             item=item,
             plan=plan,
+            dag=dag,
             candidate=candidate,
         )