refactor: drop dead materialize() + cross-backend parity script (−425 LOC)

lefthook.yml

@@ -63,10 +63,10 @@ pre-push:
     # mirrors the SKIP behaviour of scripts/pack-determinism-audit.sh.
     - name: verdict
       run: |
-        if [ -f .codehub/graph.duckdb ] || [ -f .codehub/graph.lbug ]; then
+        if [ -f .codehub/graph.lbug ]; then
           {pnpm} codehub verdict --base origin/main --head HEAD
         else
-          echo "verdict skipped: no .codehub/graph.duckdb or graph.lbug (run 'mise run och:self-analyze' first)"
+          echo "verdict skipped: no .codehub/graph.lbug (run 'mise run och:self-analyze' first)"
         fi
       skip:
         - merge

packages/cli/src/commands/list.ts

@@ -34,10 +34,8 @@ type Health = "ok" | "path-missing" | "graph-missing";
 
 function classifyHealth(entry: RepoEntry): Health {
   if (!existsSync(entry.path)) return "path-missing";
-  // Backend-aware probe: any of `meta.json`, `graph.duckdb`, or
-  // `graph.lbug` under `.codehub/` counts as "indexed". The legacy
-  // hard-coded `graph.duckdb` check pre-dated the M3 backend split and
-  // would have flagged every `CODEHUB_STORE=lbug` repo as broken.
+  // Indexed probe: presence of `meta.json` / `graph.lbug` under `.codehub/`
+  // counts as "indexed" (lbug is the only graph backend post-ADR 0016).
   if (!codehubIsIndexed(entry.path)) return "graph-missing";
   return "ok";
 }

packages/scip-ingest/src/derive.ts

@@ -8,7 +8,7 @@
  * definition. Innermost enclosing wins.
  */
 
-import type { ScipDocument, ScipIndex, ScipOccurrence, ScipRange } from "./parse.js";
+import type { ScipDocument, ScipIndex, ScipRange } from "./parse.js";
 import { SCIP_ROLE_DEFINITION, SCIP_ROLE_IMPORT } from "./parse.js";
 
 export interface DerivedEdge {
@@ -245,13 +245,6 @@ function findDefinition(doc: ScipDocument, symbol: string): ScipRange | null {
   return null;
 }
 
-export function findOccurrencesBySymbol(
-  doc: ScipDocument,
-  symbol: string,
-): readonly ScipOccurrence[] {
-  return doc.occurrences.filter((o) => o.symbol === symbol);
-}
-
 /**
  * Build a SCIP-symbol -> definition-site map from an index.
  *

packages/scip-ingest/src/index.ts

@@ -8,30 +8,15 @@
  *   2. `parseScipIndex(fsReadSync(path))` decodes the protobuf stream.
  *   3. `deriveIndex(index)` computes caller->callee edges via innermost-
  *      enclosing-range attribution (see `./derive.ts`).
- *   4. `materialize(edges)` produces blast-score metrics +
- *      reach-forward / reach-backward closures for the MCP retrieval
- *      pack.
- *   5. Consumers (the `scip-index` ingestion phase) convert
+ *   4. Consumers (the `scip-index` ingestion phase) convert
  *      DerivedEdge → CodeRelation with
  *        `reason = "scip:<indexer-name>@<version>"` and
  *        `confidence = 1.0`, fulfilling the oracle-edge contract that
  *      `confidence-demote` and downstream consumers expect.
  */
 
 export type { DerivedEdge, DerivedIndex, DerivedRelation, DerivedSymbol } from "./derive.js";
-export {
-  buildSymbolDefIndex,
-  deriveEdges,
-  deriveIndex,
-  findOccurrencesBySymbol,
-} from "./derive.js";
-export type {
-  BlastMetrics,
-  MaterializeOptions,
-  MaterializeResult,
-  ReachPair,
-} from "./materialize.js";
-export { materialize } from "./materialize.js";
+export { buildSymbolDefIndex, deriveEdges, deriveIndex } from "./derive.js";
 export type {
   ScipDocument,
   ScipIndex,
@@ -57,10 +42,4 @@ export type {
   IndexerResult,
   RunIndexerOptions,
 } from "./runners/index.js";
-export {
-  buildCommand,
-  defaultCobolProleapPaths,
-  detectLanguages,
-  runIndexer,
-  SCIP_DOTNET_MIN_SDK_MAJOR,
-} from "./runners/index.js";
+export { buildCommand, detectLanguages, runIndexer } from "./runners/index.js";

packages/storage/src/graphdb-adapter.ts

@@ -1312,7 +1312,7 @@ export class GraphDbStore implements IGraphStore {
     }
   }
 
-  /** Replaces `WITH RECURSIVE ... USING KEY (ancestor_id)` — see {@link DuckDbStore.traverseAncestors}. */
+  /** Ancestor traversal via a Cypher variable-length upward walk (the lbug analogue of a recursive ancestor query). */
   async traverseAncestors(opts: AncestorTraversalOptions): Promise<readonly TraverseResult[]> {
     return this.traverseDirectionalGd(opts, "up");
   }