rdmsm4x changelog — Amagansett preview edge audit

Read-only audit completed for /Users/richh/dev/_handoff/codex-out/amagansett-white-preview-fidelity-20260825.

• Scope: amagansett-preview-edge routing, static assets, Access evidence, headers/cache, SPA fallback, deployment dry-run, and six-preview extensibility.
• File created: /Users/richh/dev/_handoff/codex-out/amagansett-technical-audits-20260825/worker-amagansett-preview-edge.md.
• Commands: focused Vitest worker test, strict TypeScript check, preview Vite build, preview Wrangler dry-run, root Worker dry-run, and local Vite preview curl smoke checks.
• Evidence: focused worker tests 6/6 passed; typecheck passed; preview build passed; Wrangler read 8 assets and exited successfully; no deploy or credentials accessed.
• Verdict: conditional fail for independent Worker acceptance because Access, security/cache headers, and fallback behavior are not encoded or locally tested; six-card extension does not require an architecture change.
• Backup/undo: no source files changed; remove the audit artifact and this changelog only if the owner explicitly requests cleanup.
• Outstanding owner action: capture live unauthenticated Access and production fallback/header probes before accepting the edge Worker.