Committed. The Git bundle is 5.76 MB, under the 8 MiB limit, with a clean working tree. Final state:

Delivered

• dist/ is a byte-for-byte mirror of the upstream cave-site. All 88 files listed in MANIFEST.json were downloaded and hashed before anything was written, with zero mismatches.
• dist/index.html differs from upstream only on line 740, the const CONFIG = line, where preview became false, the contract address was set, and start became 1791810000. The mirror script proves this by reversing the three edits in memory and re-hashing to the upstream value.
• dist/MANIFEST-PUBLISHED.txt lists the sha256 of every published file and passes sha256sum -c.
• scripts/mirror.py reproduces the whole download, verify, patch and publish flow and has an offline --verify mode. scripts/check-scripts.mjs parses both inline scripts as the typecheck stand-in. package.json carries only script aliases, so the lockfile is empty of packages and no node_modules exists.
• README.md covers install, preview, rebuild and publish plus the actual check results. DESIGN.md documents the tokens, typography, layout, breakpoints and components extracted from the source with line references. VALIDATION.md holds the Better Interface review, with an identical copy and the screenshots under artifacts/, which the workspace excludes from Git.

Checks that ran

• Manifest verification, published-manifest self-check and inline-script parse all passed.
• Headless Chromium rendered the export served under a subpath at four widths with no console errors, no failed requests and no broken images. Fonts loaded, the countdown and contract address render, and nav, FAQ, seat check, map selection, keyboard walk and reduced motion all behaved.

Limitations and open findings

• The assignment's MCP browser could not open the export because file URLs are blocked and no preview launcher was provided, so rendered evidence comes from a scripted Chromium run instead. No screen-reader, native-zoom or physical-device checks were made.
• The review found eight issues, none fixable under the verbatim brief: a clipped caption at 320px, a 3.4:1 primary button contrast, an unlabeled seat input, mouse-only map cells, duplicate "Opens in" button labels, 16px nav hit areas, no main landmark, and a browser-default focus ring. Each is recorded with file and line for upstream.