The diff touches only presentation/config: `app/layout.tsx` adds Open Graph and Twitter metadata derived from existing `site.name`/`site.subtitle`, `src/config/site.ts` adds a `url` and `ogImage` field with documented null-safe fallback, and a new static image is added under `public/images/`. No files under `content/` are touched, no citations, locators, verification labels, or assessments are added or altered, and the tooling found no citation identifiers to check. AGENTS.md is untouched and no check (CI, ratification, provenance display) is weakened or bypassed. The added dependencies are none — this uses Next's built-in `Metadata` type, consistent with §4's minimal-dependency rule — and the metadata is static, adding no live AI calls or servers. The only unverifiable element is the binary og-card image, described as a crop of existing house cover art; nothing in the diff suggests confidential (`arc/`/`notes.txt`/Hawke-derived) material, so I see no positive evidence of a §3.15 confidentiality problem. Ordinary imperfections (a 1.5 MB card image) are style, not violation.

The change only touches layout metadata, a new static image asset, and site configuration; it does not alter any epistemic content under content/ or the assessment/provenance machinery. No citations, sources, or locators are added, so rules about real citations, exact provenance, and calibrated uncertainty are not implicated. The comments describing the og-card as a crop of existing cover art are descriptive and do not create or modify evidence records. There is no modification of AGENTS.md or any other constitutional file, so §3.15 is respected. No checks or safeguards defined in §3.15 are weakened, and there is no indication of publishing confidential material. Therefore, the diff is consistent with the constitution’s requirements.

The pull request adds standard Next.js metadata properties (openGraph and twitter) to `app/layout.tsx` and the corresponding configuration in `src/config/site.ts` to support link previews. It introduces a static image file without adding new dependencies or modifying core domain models. This change is purely presentational, adheres to the Phase-1 static site constraints, and does not alter the epistemic ledger, assessments, or weaken any constitutional checks.

The diff only adds Open Graph/Twitter metadata in app/layout.tsx, a site.url/ogImage config in src/config/site.ts, and a static public/images/og-card.png. It does not touch AGENTS.md, content records, citations, assessments, or provenance, and citation tooling found no identifiers. No checks are weakened, no confidential-path material is cited, and no live AI, auth, or extra dependencies are introduced. The binary card is claimed as a crop of already-public house cover art; nothing in the visible text contradicts that or fabricates a source. This is ordinary Phase-1 presentation work under §§4, 7, and 8.

This is a pure presentation-layer change: it adds Open Graph/Twitter metadata in app/layout.tsx, two config values in src/config/site.ts, and a static og-card image. No content under content/ is touched, no citations are added (the mechanical verifier found none), no claims, evidence, sources, or assessments are modified, and AGENTS.md is untouched. The new site.url is deployment configuration, not a citation or locator, and is consistent with the existing repoUrl origin; the null-safe metadataBase pattern and honest comments about crawler fallback show no false precision or deceptive labeling. The binary og-card.png cannot be inspected in a diff, but the PR describes it as a crop of already-public house cover art, and there is no positive evidence it exposes confidential arc/ or notes.txt material — unfamiliarity with a binary asset is not itself evidence of violation. No dependencies are added, the static-export architecture is preserved, and none of the §3.15 checks are weakened or dodged.