Interim synthetic fixtures (50k/100k) are generated via docs/samples/graph/interim/generate.py (deterministic, hashes in manifest). Use these for BENCH-GRAPH-21-001/002 until overlay schema is finalized. Canonical fixture remains blocked on overlay field confirmation from Graph Guild. Inputs: scanner surface mock bundle v1 (or real caches when cleared), overlay schema from Graph Guild, tenant demo-tenant.Determinism: RANDOM_SEED=424242, timestamps frozen to 2025-11-22T00:00:00Z, UTF-8, sorted keys/rows.Generation steps (once unblocked): Parse mock SBOM bundle → node/edge sets per Graph schema. Generate policy overlay snapshot using final overlay fields; include verdict, ruleId, severity, provenance hash. Write NDJSON (nodes.ndjson, edges.ndjson, overlays/policy.ndjson) sorted by id. Emit manifest.json with SHA-256, counts, timestamps; DSSE-sign manifest for offline kits. Add verify.sh to recompute hashes and validate counts/overlay fields. Receive overlay field mapping + file naming from Graph Guild (was due 2025-11-22). Confirm allowed mock SBOM source list and artifact naming (Graph Guild / SBOM Service Guild). Provide expected node/edge cardinality breakdown to guide generation. Interim: docs/samples/graph/interim/generate.py Canonical (to write): docs/samples/graph/scripts/generate-canonical.py + verify.sh (DSSE + hash check), once schema confirmed. 