diff --git a/scripts/src/gh-token-repository-override.test.ts b/scripts/src/gh-token-repository-override.test.ts
index 541b7b04..e1e3fff9 100644
--- a/scripts/src/gh-token-repository-override.test.ts
+++ b/scripts/src/gh-token-repository-override.test.ts
@@ -84,6 +84,22 @@ describe("GitHub repository token overrides", () => {
     expect(selected.probe).toMatchObject({ source: "yaml-token-source", scope: "repository-override", yamlSourcePriority: "before-env" });
   });
 
+  test("matches repository overrides without case sensitivity", () => {
+    delete process.env.GH_TOKEN;
+    delete process.env.GITHUB_TOKEN;
+    const authConfig = testAuthConfig();
+
+    for (const repo of ["PikaInc/selfmedia", "pikainc/SELFMEDIA", "PIKAINC/SELFMEDIA"]) {
+      const selected = resolveToken(repo, false, authConfig);
+      expect(selected.token).toBe("selfmedia-token");
+      expect(selected.probe).toMatchObject({ scope: "repository-override", sourceRef: "selfmedia-token.txt", valuesPrinted: false });
+    }
+
+    const global = resolveToken("PikasTech/UniDesk", false, authConfig);
+    expect(global.token).toBe("global-token");
+    expect(global.probe).toMatchObject({ scope: "global", sourceRef: "global-token.txt", valuesPrinted: false });
+  });
+
   test("uses the final positional repository for issue and PR token selection", () => {
     delete process.env.GH_TOKEN;
     delete process.env.GITHUB_TOKEN;
diff --git a/scripts/src/gh/auth-and-safety.ts b/scripts/src/gh/auth-and-safety.ts
index 2082c988..b9542157 100644
--- a/scripts/src/gh/auth-and-safety.ts
+++ b/scripts/src/gh/auth-and-safety.ts
@@ -31,6 +31,10 @@ export interface GitHubYamlAuthConfig {
   repositoryOverrides: GitHubYamlTokenSourceConfig[];
 }
 
+function repositoryLookupKey(repository: string): string {
+  return repository.toLowerCase();
+}
+
 export function readIssueLifecycleCommentBody(options: GitHubOptions, command: string): { body: string; bodySource: Record<string, unknown> } | null {
   if (options.comment === undefined && options.commentFile === undefined) return null;
   if (options.comment !== undefined) {
@@ -59,7 +63,10 @@ export function tokenFromEnvironment(): GitHubTokenProbe {
 }
 
 export function tokenFromYamlSource(repo: string, authConfig: GitHubYamlAuthConfig = readGitHubYamlAuthConfig()): { token: string | null; probe: GitHubTokenProbe } {
-  const override = authConfig.repositoryOverrides.find((candidate) => candidate.repository === repo) ?? null;
+  const repoLookupKey = repositoryLookupKey(repo);
+  const override = authConfig.repositoryOverrides.find((candidate) => (
+    candidate.repository !== undefined && repositoryLookupKey(candidate.repository) === repoLookupKey
+  )) ?? null;
   const config = override ?? authConfig.tokenSource;
   if (config === null || config.enabled === false) {
     return {
@@ -162,8 +169,9 @@ function readGitHubYamlAuthConfig(): GitHubYamlAuthConfig {
     const configRef = `${GITHUB_REPOSITORY_OVERRIDES_CONFIG_REF}[${index}]`;
     const override = asRecord(value, configRef);
     const repository = repositoryField(override, "repository", configRef);
-    if (seenRepositories.has(repository)) throw new Error(`${GITHUB_REPOSITORY_OVERRIDES_CONFIG_REF} contains duplicate repository ${repository}`);
-    seenRepositories.add(repository);
+    const repositoryKey = repositoryLookupKey(repository);
+    if (seenRepositories.has(repositoryKey)) throw new Error(`${GITHUB_REPOSITORY_OVERRIDES_CONFIG_REF} contains duplicate repository ${repository}`);
+    seenRepositories.add(repositoryKey);
     return {
       repository,
       priority: tokenSourcePriorityField(override, "priority", configRef),