diff --git a/apps/gittensory-ui/src/components/site/app-panels/activation-preview.test.tsx b/apps/gittensory-ui/src/components/site/app-panels/activation-preview.test.tsx
index f17747b431..113d8bbe99 100644
--- a/apps/gittensory-ui/src/components/site/app-panels/activation-preview.test.tsx
+++ b/apps/gittensory-ui/src/components/site/app-panels/activation-preview.test.tsx
@@ -96,7 +96,6 @@ describe("ActivationPreview", () => {
       ok: true,
       data: {
         repoFullName: "acme/widgets",
-        gateCheckMode: "enabled",
         reviewCheckMode: "required",
         checkRunMode: "enabled",
         linkedIssueGateMode: "advisory",
diff --git a/apps/gittensory-ui/src/components/site/app-panels/activation-preview.tsx b/apps/gittensory-ui/src/components/site/app-panels/activation-preview.tsx
index b188e20d4e..fa6165f873 100644
--- a/apps/gittensory-ui/src/components/site/app-panels/activation-preview.tsx
+++ b/apps/gittensory-ui/src/components/site/app-panels/activation-preview.tsx
@@ -34,7 +34,6 @@ type ActivationPreviewResponse = {
 
 type ActivationResponse = {
   repoFullName: string;
-  gateCheckMode: string;
   reviewCheckMode: string;
   checkRunMode: string;
   linkedIssueGateMode: string;
diff --git a/packages/gittensory-engine/src/types/manifest-deps-types.ts b/packages/gittensory-engine/src/types/manifest-deps-types.ts
index bae7e63f31..6b15989c72 100644
--- a/packages/gittensory-engine/src/types/manifest-deps-types.ts
+++ b/packages/gittensory-engine/src/types/manifest-deps-types.ts
@@ -155,6 +155,8 @@ export type RepositorySettings = {
   publicSignalLevel: "minimal" | "standard";
   checkRunMode: "off" | "enabled";
   checkRunDetailLevel: "minimal" | "standard";
+  /** @deprecated (#4618, tracked for removal in #5373) computed read-back of {@link reviewCheckMode}
+   *  below, kept only for API/dashboard back-compat display -- read `reviewCheckMode` instead. */
   gateCheckMode: "off" | "enabled";
   /** Scheduled re-gate sweep candidate ordering (#3815). `staleness` (default) picks whichever open PR the
    *  sweep has gone longest WITHOUT re-gating (see selectRegateCandidates), which is what gives the sweep its
diff --git a/src/openapi/schemas.ts b/src/openapi/schemas.ts
index 0769ae537d..47a51c95c1 100644
--- a/src/openapi/schemas.ts
+++ b/src/openapi/schemas.ts
@@ -670,6 +670,8 @@ export const RepositorySettingsSchema = z
     publicSignalLevel: z.enum(["minimal", "standard"]),
     checkRunMode: z.enum(["off", "enabled"]),
     checkRunDetailLevel: z.enum(["minimal", "standard"]),
+    // @deprecated (#4618, tracked for removal in #5373): computed read-back of reviewCheckMode kept only
+    // for API/dashboard back-compat display -- read reviewCheckMode instead.
     gateCheckMode: z.enum(["off", "enabled"]),
     regateSweepOrderMode: z.enum(["staleness", "oldest-first"]),
     reviewCheckMode: z.enum(["required", "visible", "disabled"]),
@@ -885,6 +887,8 @@ export const RepoSettingsPreviewSchema = z
       publicSignalLevel: z.enum(["minimal", "standard"]),
       checkRunMode: z.enum(["off", "enabled"]),
       checkRunDetailLevel: z.enum(["minimal", "standard"]),
+      // @deprecated (#4618, tracked for removal in #5373): computed read-back of reviewCheckMode kept only
+      // for API/dashboard back-compat display -- read reviewCheckMode instead.
       gateCheckMode: z.enum(["off", "enabled"]),
       regateSweepOrderMode: z.enum(["staleness", "oldest-first"]),
       reviewCheckMode: z.enum(["required", "visible", "disabled"]),
@@ -1288,6 +1292,8 @@ export const InstallationRepairSchema = z
           commentMode: z.enum(["off", "detected_contributors_only", "all_prs"]),
           publicAudienceMode: z.enum(["oss_maintainer", "gittensor_only"]),
           checkRunMode: z.enum(["off", "enabled"]),
+          // @deprecated (#4618, tracked for removal in #5373): computed read-back of reviewCheckMode kept only
+          // for API/dashboard back-compat display -- read reviewCheckMode instead.
           gateCheckMode: z.enum(["off", "enabled"]),
           reviewCheckMode: z.enum(["required", "visible", "disabled"]),
           autoProjectMilestoneMatch: z.enum(["off", "suggest", "auto"]).optional(),
@@ -2207,6 +2213,8 @@ export const RegistrationReadinessSchema = z
       commentMode: z.enum(["off", "detected_contributors_only", "all_prs"]),
       publicAudienceMode: z.enum(["oss_maintainer", "gittensor_only"]),
       checkRunMode: z.enum(["off", "enabled"]),
+      // @deprecated (#4618, tracked for removal in #5373): computed read-back of reviewCheckMode kept only
+      // for API/dashboard back-compat display -- read reviewCheckMode instead.
       gateCheckMode: z.enum(["off", "enabled"]),
       reviewCheckMode: z.enum(["required", "visible", "disabled"]),
       autoProjectMilestoneMatch: z.enum(["off", "suggest", "auto"]).optional(),
diff --git a/src/services/maintainer-activation.ts b/src/services/maintainer-activation.ts
index 350d302c92..71a80978a7 100644
--- a/src/services/maintainer-activation.ts
+++ b/src/services/maintainer-activation.ts
@@ -19,6 +19,8 @@ export type MaintainerActivationPreview = {
   repoFullName: string;
   generatedAt: string;
   // What's on today, so the UI can show the current state next to the one-click ramp.
+  /** @deprecated (#4618, tracked for removal in #5373) sourced from the computed read-back
+   *  `RepositorySettings["gateCheckMode"]` -- kept only for API/dashboard back-compat display. */
   currentGateMode: RepositorySettings["gateCheckMode"];
   aiReviewConfigured: boolean;
   evaluatedCount: number;
diff --git a/src/signals/registration-readiness.ts b/src/signals/registration-readiness.ts
index 4cc2fbe92f..42c9416254 100644
--- a/src/signals/registration-readiness.ts
+++ b/src/signals/registration-readiness.ts
@@ -36,6 +36,8 @@ export type GithubAppBehavior = {
   commentMode: RepositorySettings["commentMode"];
   publicAudienceMode: RepositorySettings["publicAudienceMode"];
   checkRunMode: RepositorySettings["checkRunMode"];
+  /** @deprecated (#4618, tracked for removal in #5373) computed read-back of {@link reviewCheckMode} kept
+   *  only for API/dashboard back-compat display -- read `reviewCheckMode` instead. */
   gateCheckMode: RepositorySettings["gateCheckMode"];
   reviewCheckMode: RepositorySettings["reviewCheckMode"];
   quietByDefault: boolean;
diff --git a/src/signals/settings-preview.ts b/src/signals/settings-preview.ts
index cd32be3b8b..c0bc9546da 100644
--- a/src/signals/settings-preview.ts
+++ b/src/signals/settings-preview.ts
@@ -191,6 +191,8 @@ export type RepoSettingsPreview = {
     publicSignalLevel: RepositorySettings["publicSignalLevel"];
     checkRunMode: RepositorySettings["checkRunMode"];
     checkRunDetailLevel: RepositorySettings["checkRunDetailLevel"];
+    /** @deprecated (#4618, tracked for removal in #5373) computed read-back of {@link reviewCheckMode}
+     *  kept only for API/dashboard back-compat display -- read `reviewCheckMode` instead. */
     gateCheckMode: RepositorySettings["gateCheckMode"];
     regateSweepOrderMode: RepositorySettings["regateSweepOrderMode"];
     reviewCheckMode: RepositorySettings["reviewCheckMode"];
diff --git a/src/types.ts b/src/types.ts
index 7c2d6ceecf..261afef5fc 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -715,10 +715,10 @@ export type RepositorySettings = {
   // #4620: "deep" removed -- it was never wired to any different behavior than "standard" (formatCheckRunOutput
   // and buildCheckRunAnnotations in rules/advisory.ts both branch only on `=== "minimal"` vs not).
   checkRunDetailLevel: "minimal" | "standard";
-  /** Legacy shadow of {@link reviewCheckMode} (#2852), deprecated (#4618): a computed read-back value only,
-   *  for API/dashboard back-compat display. `"enabled"` when `reviewCheckMode !== "disabled"`, else `"off"`
-   *  -- see getRepositorySettings/upsertRepositorySettings in db/repositories.ts. No write path accepts this
-   *  field anymore; set {@link reviewCheckMode} directly instead. */
+  /** @deprecated (#4618, tracked for removal in #5373) Legacy shadow of {@link reviewCheckMode} (#2852): a
+   *  computed read-back value only, for API/dashboard back-compat display. `"enabled"` when
+   *  `reviewCheckMode !== "disabled"`, else `"off"` -- see getRepositorySettings/upsertRepositorySettings in
+   *  db/repositories.ts. No write path accepts this field anymore; set {@link reviewCheckMode} directly instead. */
   gateCheckMode: "off" | "enabled";
   /** Scheduled re-gate sweep candidate ordering (#3815). `staleness` (default) picks whichever open PR the
    *  sweep has gone longest WITHOUT re-gating (see selectRegateCandidates), which is what gives the sweep its