Produce a deterministic large-scale SBOM graph fixture (~40k nodes) with policy overlay snapshot for perf/regression suites (UI/CLI/Graph API). Align with current graph node/edge schema and overlay format used by StellaOps.Graph.Indexer and Vulnerability Explorer. Ensure offline parity: fixtures packaged for Offline Kit consumption (NDJSON + manifest hashes). Overlay format resolved: policy.overlay.v1 with overlay_id = sha256(tenant|nodeId|overlayKind), verdict + severity, optional edge to policy rule node for bench compatibility. SBOM bundle source: scanner surface mock bundle v1; swap in real cache when approved without schema changes. Tenant: demo-tenant; timestamps frozen to 2025-11-22T00:00:00Z. Location: docs/samples/graph/graph-40k/ nodes.ndjson: 40,000 component nodes (pkg:pypi/demo-*)edges.ndjson: 100,071 DEPENDS_ON edges (fan-out ≤4, DAG order)overlay.ndjson: 100 policy.overlay.v1 records (verdict/severity + optional policy-rule edge)manifest.json: hashes (SHA-256) and counts (nodes d14e8c64…, edges 143a2944…, overlay 627a0d8c…)README.md and verify.py: usage, hashes, offline verificationDeterministic generator docs/samples/graph/scripts/generate_canonical.py (seed 424242, snapshot graph-40k-policy-overlay-20251122). Writes nodes/edges/overlay with sorted keys, then manifest with hashes/counts. verify.py recomputes hashes/counts to confirm reproducibility.Synthetic deterministic graphs under docs/samples/graph/interim/:graph-50k (50k nodes, ~200k edges)graph-100k (100k nodes, ~400k edges) Minimal schema (id, kind, name, version, tenant), seeded RNG, stable ordering, manifests with hashes. Purpose: throughput/latency benches; overlay-free. Regenerate if Graph overlay schema changes; update manifest/hashes and downstream references. Consider adding advisory/VEX nodes once Graph/Concelier schema freeze lands; currently component-focused. Wire graph-40k into BENCH-GRAPH-21-001/002 results and UI fixtures (SAMPLES-GRAPH-24-004). Add CAS/DSSE manifest once Offline Kit package format is finalized. 