diff --git a/lib/analyze-action.js b/lib/analyze-action.js
index 7e4e89eeab..b9c6cc2abe 100644
--- a/lib/analyze-action.js
+++ b/lib/analyze-action.js
@@ -108012,7 +108012,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/lib/autobuild-action.js b/lib/autobuild-action.js
index e495cffbee..f542bd4361 100644
--- a/lib/autobuild-action.js
+++ b/lib/autobuild-action.js
@@ -103130,6 +103130,10 @@ function getWorkflowRunAttempt() {
 function isSelfHostedRunner() {
   return process.env.RUNNER_ENVIRONMENT === "self-hosted";
 }
+var CCR_KEY_PREFIX = "dynamic/copilot-pull-request-reviewer";
+function isCCR() {
+  return process.env["CODEQL_ACTION_ANALYSIS_KEY" /* ANALYSIS_KEY */]?.startsWith(CCR_KEY_PREFIX) || false;
+}
 function prettyPrintInvocation(cmd, args) {
   return [cmd, ...args].map((x) => x.includes(" ") ? `'${x}'` : x).join(" ");
 }
@@ -104345,7 +104349,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/lib/init-action-post.js b/lib/init-action-post.js
index 1f1869f412..ea87c71e31 100644
--- a/lib/init-action-post.js
+++ b/lib/init-action-post.js
@@ -165338,7 +165338,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/lib/init-action.js b/lib/init-action.js
index 34c83bc4ae..e4841c5d33 100644
--- a/lib/init-action.js
+++ b/lib/init-action.js
@@ -105545,7 +105545,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/lib/setup-codeql-action.js b/lib/setup-codeql-action.js
index 445f3b5768..2a999e3fe5 100644
--- a/lib/setup-codeql-action.js
+++ b/lib/setup-codeql-action.js
@@ -103247,6 +103247,10 @@ function isSelfHostedRunner() {
 function isDynamicWorkflow() {
   return getWorkflowEventName() === "dynamic";
 }
+var CCR_KEY_PREFIX = "dynamic/copilot-pull-request-reviewer";
+function isCCR() {
+  return process.env["CODEQL_ACTION_ANALYSIS_KEY" /* ANALYSIS_KEY */]?.startsWith(CCR_KEY_PREFIX) || false;
+}
 function prettyPrintInvocation(cmd, args) {
   return [cmd, ...args].map((x) => x.includes(" ") ? `'${x}'` : x).join(" ");
 }
@@ -104246,7 +104250,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/lib/start-proxy-action.js b/lib/start-proxy-action.js
index 1aa9d0f634..7d43b435de 100644
--- a/lib/start-proxy-action.js
+++ b/lib/start-proxy-action.js
@@ -120267,6 +120267,10 @@ function getWorkflowRunAttempt() {
 function isSelfHostedRunner() {
   return process.env.RUNNER_ENVIRONMENT === "self-hosted";
 }
+var CCR_KEY_PREFIX = "dynamic/copilot-pull-request-reviewer";
+function isCCR() {
+  return process.env["CODEQL_ACTION_ANALYSIS_KEY" /* ANALYSIS_KEY */]?.startsWith(CCR_KEY_PREFIX) || false;
+}
 var persistedInputsKey = "persisted_inputs";
 var persistInputs = function() {
   const inputEnvironmentVariables = Object.entries(process.env).filter(
@@ -121039,7 +121043,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/lib/upload-sarif-action.js b/lib/upload-sarif-action.js
index e326893e67..f05e5330f7 100644
--- a/lib/upload-sarif-action.js
+++ b/lib/upload-sarif-action.js
@@ -107200,7 +107200,14 @@ var GitHubFeatureFlags = class {
   async loadApiResponse() {
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features."
+        "Not running against github.com. Using default values for all features."
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features."
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};
diff --git a/src/feature-flags.test.ts b/src/feature-flags.test.ts
index cdab85e279..6632cf2523 100644
--- a/src/feature-flags.test.ts
+++ b/src/feature-flags.test.ts
@@ -4,6 +4,7 @@ import * as path from "path";
 import test, { ExecutionContext } from "ava";
 
 import * as defaults from "./defaults.json";
+import { EnvVar } from "./environment";
 import {
   Feature,
   featureConfig,
@@ -37,29 +38,39 @@ test.beforeEach(() => {
 
 const testRepositoryNwo = parseRepositoryNwo("github/example");
 
-test(`All features are disabled if running against GHES`, async (t) => {
+test(`All features use default values if running against GHES`, async (t) => {
   await withTmpDir(async (tmpDir) => {
-    const loggedMessages = [];
+    const loggedMessages: LoggedMessage[] = [];
     const features = setUpFeatureFlagTests(
       tmpDir,
       getRecordingLogger(loggedMessages),
       { type: GitHubVariant.GHES, version: "3.0.0" },
     );
 
-    for (const feature of Object.values(Feature)) {
-      t.deepEqual(
-        await getFeatureIncludingCodeQlIfRequired(features, feature),
-        featureConfig[feature].defaultValue,
-      );
-    }
+    await assertAllFeaturesHaveDefaultValues(t, features);
+    assertLoggedMessage(
+      t,
+      loggedMessages,
+      "Not running against github.com. Using default values for all features.",
+    );
+  });
+});
 
-    t.assert(
-      loggedMessages.find(
-        (v: LoggedMessage) =>
-          v.type === "debug" &&
-          v.message ===
-            "Not running against github.com. Disabling all toggleable features.",
-      ) !== undefined,
+test(`All features use default values if running in CCR`, async (t) => {
+  await withTmpDir(async (tmpDir) => {
+    const loggedMessages: LoggedMessage[] = [];
+    const features = setUpFeatureFlagTests(
+      tmpDir,
+      getRecordingLogger(loggedMessages),
+    );
+
+    process.env[EnvVar.ANALYSIS_KEY] = "dynamic/copilot-pull-request-reviewer";
+
+    await assertAllFeaturesHaveDefaultValues(t, features);
+    assertLoggedMessage(
+      t,
+      loggedMessages,
+      "Feature flags are not supported in Copilot Code Review. Using default values for all features.",
     );
   });
 });
@@ -542,6 +553,30 @@ test("non-legacy feature flags should not start with codeql_action_", async (t)
   }
 });
 
+async function assertAllFeaturesHaveDefaultValues(
+  t: ExecutionContext<unknown>,
+  features: FeatureEnablement,
+) {
+  for (const feature of Object.values(Feature)) {
+    t.deepEqual(
+      await getFeatureIncludingCodeQlIfRequired(features, feature),
+      featureConfig[feature].defaultValue,
+    );
+  }
+}
+
+function assertLoggedMessage(
+  t: ExecutionContext<unknown>,
+  loggedMessages: LoggedMessage[],
+  expectedMessage: string,
+) {
+  t.assert(
+    loggedMessages.find(
+      (v: LoggedMessage) => v.type === "debug" && v.message === expectedMessage,
+    ) !== undefined,
+  );
+}
+
 function assertAllFeaturesUndefinedInApi(
   t: ExecutionContext<unknown>,
   loggedMessages: LoggedMessage[],
diff --git a/src/feature-flags.ts b/src/feature-flags.ts
index ea8cc1767b..04508089d9 100644
--- a/src/feature-flags.ts
+++ b/src/feature-flags.ts
@@ -3,6 +3,7 @@ import * as path from "path";
 
 import * as semver from "semver";
 
+import { isCCR } from "./actions-util";
 import { getApiClient } from "./api-client";
 import type { CodeQL } from "./codeql";
 import * as defaults from "./defaults.json";
@@ -664,7 +665,14 @@ class GitHubFeatureFlags {
     // Do nothing when not running against github.com
     if (!supportsFeatureFlags(this.gitHubVersion.type)) {
       this.logger.debug(
-        "Not running against github.com. Disabling all toggleable features.",
+        "Not running against github.com. Using default values for all features.",
+      );
+      this.hasAccessedRemoteFeatureFlags = false;
+      return {};
+    }
+    if (isCCR()) {
+      this.logger.debug(
+        "Feature flags are not supported in Copilot Code Review. Using default values for all features.",
       );
       this.hasAccessedRemoteFeatureFlags = false;
       return {};