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docs/phase12/DEPENDENCY_CHANGE_REPORT_v1.0.md

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+# Phase 12 Dependency Change Report
+
+## Result
+
+No direct production or development dependency was added, removed, or version-changed in Phase 12. The exact Phase 11 dependency graph and `pnpm-lock.yaml` are retained.
+
+## Rationale
+
+- Icons use a reviewed internal SVG map.
+- Dialog and drawer behavior use native `dialog` plus existing React utilities.
+- Tabs, accordion, segmented controls, menus, tooltips, and form primitives use platform semantics and existing React.
+- CSS Modules remain the sole component styling method.
+- Existing Vitest, Testing Library, Playwright, and axe packages cover automated tests.
+
+## Verification
+
+`scripts/validate-runtime-dependencies.mjs` confirms the exact pinned direct versions remain represented in the lockfile. `npm install --engine-strict=false --ignore-scripts --package-lock=false` was used only as a local fallback after registry failures prevented the required frozen pnpm installation.
+
+## Blocked gates
+
+- `pnpm install --frozen-lockfile`: blocked by registry DNS failures.
+- `pnpm audit --audit-level low`: blocked by registry DNS failures and timed out after retry scheduling.
+- Node 24.17.0 verification: unavailable on this host; Node 22.16.0 was used for local execution.
+
+These are tracked by P12-003 and P12-004.