diff --git a/apps/server/src/telemetry/Identify.test.ts b/apps/server/src/telemetry/Identify.test.ts
index ab151821789a..91216c12f919 100644
--- a/apps/server/src/telemetry/Identify.test.ts
+++ b/apps/server/src/telemetry/Identify.test.ts
@@ -77,6 +77,49 @@ it.layer(NodeServices.layer)("telemetry identity", (it) => {
     ),
   );
 
+  it.effect("falls back quietly when Codex authenticates with an API key", () => {
+    const logs: CapturedLog[] = [];
+    const logger = makeCaptureLogger(logs);
+
+    return Effect.gen(function* () {
+      const config = yield* ServerConfig.ServerConfig;
+      const fileSystem = yield* FileSystem.FileSystem;
+      const path = yield* Path.Path;
+      const homeDirectory = path.join(config.baseDir, "home");
+      const codexAuthPath = path.join(homeDirectory, ".codex", "auth.json");
+      const anonymousId = "api-key-fallback-anonymous-id";
+      const privateApiKey = "sk-private-openai-api-key";
+
+      yield* fileSystem.makeDirectory(path.dirname(codexAuthPath), { recursive: true });
+      yield* fileSystem.writeFileString(
+        codexAuthPath,
+        `{"auth_mode":"apikey","OPENAI_API_KEY":"${privateApiKey}"}`,
+      );
+      yield* fileSystem.writeFileString(config.anonymousIdPath, anonymousId);
+
+      const identifier = yield* Identify.getTelemetryIdentifierForHome(homeDirectory);
+
+      assert.equal(identifier, sha256(anonymousId));
+      assert.isUndefined(findIdentityLog(logs, "codex", "TelemetryIdentityDecodeError"));
+      assert.isUndefined(findIdentityLog(logs, "codex", "TelemetryIdentityReadError"));
+      const allLogs = logs
+        .map((log) =>
+          [String(log.message), ...Object.values(log.annotations).map(String)].join("\n"),
+        )
+        .join("\n");
+      assert.notInclude(allLogs, privateApiKey);
+    }).pipe(
+      Effect.provide(
+        Layer.merge(
+          ServerConfig.layerTest(process.cwd(), {
+            prefix: "t3-telemetry-identify-apikey-",
+          }),
+          Logger.layer([logger], { mergeWithExisting: false }),
+        ),
+      ),
+    );
+  });
+
   it.effect("logs structured decode context and falls back from malformed Codex auth", () => {
     const logs: CapturedLog[] = [];
     const logger = makeCaptureLogger(logs);
diff --git a/apps/server/src/telemetry/Identify.ts b/apps/server/src/telemetry/Identify.ts
index b6c3d0066dff..7c252c442c27 100644
--- a/apps/server/src/telemetry/Identify.ts
+++ b/apps/server/src/telemetry/Identify.ts
@@ -10,10 +10,17 @@ import * as Schema from "effect/Schema";
 
 import * as ServerConfig from "../config.ts";
 
+/**
+ * Codex omits `tokens` entirely when the install authenticates with an API key
+ * rather than a ChatGPT account, so an absent `tokens` is a supported install
+ * and not a malformed file.
+ */
 const CodexAuthJsonSchema = Schema.Struct({
-  tokens: Schema.Struct({
-    account_id: Schema.String,
-  }),
+  tokens: Schema.optional(
+    Schema.Struct({
+      account_id: Schema.String,
+    }),
+  ),
 });
 
 const ClaudeJsonSchema = Schema.Struct({
@@ -183,7 +190,9 @@ const getCodexAccountId = Effect.fn("TelemetryIdentity.getCodexAccountId")(funct
     ),
   );
 
-  return Option.some(authJson.tokens.account_id);
+  return authJson.tokens === undefined
+    ? Option.none<string>()
+    : Option.some(authJson.tokens.account_id);
 });
 
 const getClaudeUserId = Effect.fn("TelemetryIdentity.getClaudeUserId")(function* (
@@ -250,6 +259,9 @@ const upsertAnonymousId = Effect.gen(function* () {
  * 1. ~/.codex/auth.json tokens.account_id
  * 2. ~/.claude.json userID
  * 3. ~/.t3/telemetry/anonymous-id
+ *
+ * A missing file or an API-key-only Codex auth.json falls through quietly. Only
+ * unreadable or malformed files warn.
  */
 export const getTelemetryIdentifierForHome = Effect.fn("getTelemetryIdentifierForHome")(
   function* (homeDirectory: string) {
diff --git a/docs/fork/0007-codex-api-key-auth-is-supported.md b/docs/fork/0007-codex-api-key-auth-is-supported.md
new file mode 100644
index 000000000000..0040bf477855
--- /dev/null
+++ b/docs/fork/0007-codex-api-key-auth-is-supported.md
@@ -0,0 +1,27 @@
+# 0007: API-key Codex installs are not reported as broken
+
+- PR: [TrogonStack/t3code#15](https://github.com/TrogonStack/t3code/pull/15)
+- Status: active
+
+## What you can do now
+
+- Run Codex authenticated with an API key instead of a ChatGPT account
+  without a warning and a stack trace on every server start. Telemetry falls
+  back to the anonymous identifier quietly, the same way it already did when
+  there is no Codex auth file at all.
+- An auth file that really is unreadable or corrupt still warns, so the
+  warning keeps meaning something.
+
+## Why
+
+API keys are a supported way to authenticate Codex, so an install using one
+is healthy and should not read as a malfunction in the logs. A warning that
+fires on every start of a working setup is worse than no warning, because it
+teaches you to scroll past the one that matters.
+
+## Upstream considerations
+
+Nothing here is fork-specific, so this belongs upstream as an ordinary bug
+fix. Submit it, then delete this entry once it merges. The surface is small
+enough that carrying it in the meantime costs nothing at sync time, though it
+does sit in a shared file, so a sync must not drop it.
diff --git a/docs/fork/README.md b/docs/fork/README.md
index d86972f85fdd..c8249d1b7c13 100644
--- a/docs/fork/README.md
+++ b/docs/fork/README.md
@@ -27,6 +27,7 @@ Each entry uses these sections:
 
 ## Ledger
 
-| #    | Divergence                                                                            | PR                                                 | Status |
-| ---- | ------------------------------------------------------------------------------------- | -------------------------------------------------- | ------ |
-| 0003 | [Native subagent threads for Claude orchestrators](./0003-native-subagent-threads.md) | [#3](https://github.com/TrogonStack/t3code/pull/3) | active |
+| #    | Divergence                                                                                     | PR                                                   | Status |
+| ---- | ---------------------------------------------------------------------------------------------- | ---------------------------------------------------- | ------ |
+| 0003 | [Native subagent threads for Claude orchestrators](./0003-native-subagent-threads.md)          | [#3](https://github.com/TrogonStack/t3code/pull/3)   | active |
+| 0007 | [API-key Codex installs are not reported as broken](./0007-codex-api-key-auth-is-supported.md) | [#15](https://github.com/TrogonStack/t3code/pull/15) | active |