refactor(#651): consolidate verification-status routing into one queryable seam (#755)

* refactor(#651): consolidate verification-status routing into one queryable seam

The passed/gaps_found/human_needed verification status was re-encoded as
bare strings across three prose surfaces (gsd-verifier emits, execute-phase
routes, ship gates), each independently deciding the per-status next action
with no parity coupling — the DEFECT.GENERATIVE-FIX class.

Give the enum one home: src/verification.cts (-> bin/lib/verification.cjs)
exposing `gsd_run query verification.status <phaseDir>` returning a typed
{status, next_action, next_command}. ship.md and execute-phase.md now consume
the query instead of re-deriving the routing in prose; gsd-verifier.md points
at the shared vocabulary as the single emitter (values unchanged).

Also fixes the latent broad-grep status misread (DEFECT.FRONTMATTER-SCALAR-
BROAD-GREP): execute-phase.md read `grep "^status:"` over the whole report, so
a body `status:` line could misroute a valid phase. Extraction is now
frontmatter-scoped in one place. A parity test fails if a verifier status
gains no route. Lands the two CONTEXT.md DEFECT entries captured on the issue.

Closes #651

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(#651): set changeset pr to 755

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

src/verification-command-router.cts

@@ -0,0 +1,56 @@
+/**
+ * Verification-status subcommand router.
+ * Routes `verification.status <phaseDir>` to verification.cmdVerificationStatus.
+ *
+ * Note: `verification` (reads verifier-emitted status) is distinct from `verify`
+ * (runs verification checks like plan-structure/artifacts). Keep them separate.
+ *
+ * ADR-457 build-at-publish: source in src/verification-command-router.cts,
+ * compiled to gsd-core/bin/lib/verification-command-router.cjs (gitignored).
+ */
+
+// eslint-disable-next-line @typescript-eslint/no-require-imports
+import cjsCommandRouterAdapter = require('./cjs-command-router-adapter.cjs');
+const { routeCjsCommandFamily } = cjsCommandRouterAdapter;
+
+// ─── Types ────────────────────────────────────────────────────────────────────
+
+interface VerificationModule {
+  cmdVerificationStatus(cwd: string, phaseDirArg: string | undefined, raw: boolean): void;
+}
+
+interface RouteVerificationCommandOptions {
+  verification: VerificationModule;
+  args: string[];
+  cwd: string;
+  raw: boolean;
+  error: (message: string) => void;
+}
+
+// ─── Implementation ───────────────────────────────────────────────────────────
+
+const VERIFICATION_SUBCOMMANDS = ['status'];
+
+function routeVerificationCommand({
+  verification,
+  args,
+  cwd,
+  raw,
+  error,
+}: RouteVerificationCommandOptions): void {
+  routeCjsCommandFamily({
+    args,
+    subcommands: VERIFICATION_SUBCOMMANDS,
+    unsupported: {},
+    error,
+    unknownMessage: (_subcommand: string, available: string[]) =>
+      `Unknown verification subcommand. Available: ${available.join(', ')}`,
+    handlers: {
+      status: () => verification.cmdVerificationStatus(cwd, args[2], raw),
+    },
+  });
+}
+
+export = {
+  routeVerificationCommand,
+};