docs(cli-registry): annotate overlays.credStore as declared-for-later

Review item 4 named THREE live tables duplicating registry data. Two are now
read from the entry (`defaultRemoteCommandForMode`, `defaultDockerCommandForMode`);
the third, `resolveDockerCredentialArtifacts`, is not — and it was left neither
wired nor annotated, which is the state that item explicitly rules out.

It is not wired because the shape cannot express the live table: `credStore` is
ONE store per CLI, and `CRED_STORES` needs two for gemini (`.gemini` for the
CLI's own auth plus `.config/gcloud` for Vertex), while deepseek's entry declares
none at all even though `.dsh` is seeded. Wiring it means making the field an
array and correcting those two entries — a change to credential seeding, which
is at once the worst thing in that file to get wrong and the least covered by
tests, since every docker IO path is no-op'd under vitest. It belongs in its own
change, measured against a real container.

So it is annotated instead, at the field, in the type's declared-for-later
header, in docs/cli-registry.md, and in the pinned DECLARED_FOR_LATER list — the
last of which means wiring it later makes a test fail rather than leaving a
stale comment behind.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WQkoi1cNegqVwZHgzx5SbJ

docs/cli-registry.md

@@ -103,6 +103,8 @@ This matters because it is invisible when it is wrong. `capabilities.privilegedP
 
 Treat those values as **transcribed, not authoritative** — nothing enforces that `echo.policy` matches `_updateLocalEchoState`'s fallthrough, or that `accent` matches the gradient CSS paints, so re-measure before wiring one up. A field that is both wrong and unread is worse than an absent one, because the next reader trusts it; `test/cli-registry-no-id-branching.test.ts` pins the list so it cannot quietly grow, and wiring one up makes its line there fail, which is the direction you want.
 
+`overlays.credStore` is in the same category, for a sharper reason: the Docker credential-seeding path still reads its own `CRED_STORES` table, because this shape allows ONE store per CLI and the live table needs two for gemini (`.gemini` for the CLI's own auth plus `.config/gcloud` for Vertex), while deepseek declares none here even though `.dsh` is seeded. Wiring it means making the field an array and correcting those two entries — a change to credential seeding, which is simultaneously the worst thing here to get wrong and the least covered by tests, since every docker IO path is no-op'd under vitest.
+
 Everything else in the interface is live, including `overlays.remote` / `overlays.docker`, which back `defaultRemoteCommandForMode()` and `defaultDockerCommandForMode()` directly. Those two used to be hardcoded `Record<…CommandMode, string>` tables duplicating the registry with nothing keeping the two in step; `test/location-overlay-commands.test.ts` pins every resulting command as a literal string.
 
 ## Resolve at call time, never at import

src/config/cli-registry/types.ts

@@ -443,6 +443,19 @@ export interface CliOverlays {
    */
   remote?: { command?: string } | { disabled: true };
   docker?: { command?: string } | { disabled: true };
+  /**
+   * ⚠️ DECLARED-FOR-LATER, unlike `remote`/`docker` above, which are live.
+   *
+   * The Docker credential-seeding path still reads its own `CRED_STORES` table in
+   * `docker-hosts.ts`, because this shape cannot yet express that table: it allows ONE store
+   * per CLI, and the live table needs two for gemini (`.gemini` for the CLI's own auth plus
+   * `.config/gcloud` for Vertex), while deepseek's entry here declares none at all even
+   * though `.dsh` is seeded. Wiring it therefore means making this an ARRAY and correcting
+   * those two entries — a change to credential seeding, which is both the highest-consequence
+   * thing in this file to get wrong and the least covered by tests, since every docker IO
+   * path is no-op'd under vitest. It belongs in its own change, measured against a real
+   * container.
+   */
   credStore?: CliCredStore;
 }
 
@@ -453,7 +466,7 @@ export interface CliOverlays {
 /**
  * ⚠️ DECLARED-FOR-LATER: fields no code reads yet.
  *
- * `shortBadge`, `accent`, `capabilities.echo`, `capabilities.wheelForward`,
+ * `shortBadge`, `accent`, `overlays.credStore`, `capabilities.echo`, `capabilities.wheelForward`,
  * `capabilities.keyboardAccessory` and `capabilities.maxFrameBytes` all describe FRONTEND
  * behaviour, and the frontend is deliberately untouched by the change that introduced this
  * registry — `app.js`, `terminal-ui.js`, `styles.css` and friends keep their own

test/cli-registry-no-id-branching.test.ts

@@ -315,6 +315,9 @@ describe('declared-for-later fields', () => {
     'capabilities.wheelForward',
     'capabilities.keyboardAccessory',
     'capabilities.maxFrameBytes',
+    // The Docker credential-seeding path still reads its own CRED_STORES table: this shape
+    // allows ONE store per CLI and the live table needs two for gemini. See CliOverlays.
+    'overlays.credStore',
   ];
 
   /** Read every `.ts` under src/, minus the registry itself (which of course names them). */