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Prefer Claude user ID for telemetry identity #1249

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Merged
juliusmarminge merged 1 commit into from
Mar 20, 2026
+24 −1
Merged

Prefer Claude user ID for telemetry identity #1249

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25 changes: 24 additions & 1 deletion apps/server/src/telemetry/Identify.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,10 @@ const CodexAuthJsonSchema = Schema.Struct({
}),
});

const ClaudeJsonSchema = Schema.Struct({
userID: Schema.String,
});

class IdentifyUserError extends Schema.TaggedErrorClass<IdentifyUserError>()("IdentifyUserError", {
message: Schema.String,
cause: Schema.optional(Schema.Defect),
Expand Down Expand Up @@ -37,6 +41,19 @@ const getCodexAccountId = Effect.gen(function* () {
return authJson.tokens.account_id;
});

const getClaudeUserId = Effect.gen(function* () {
const fileSystem = yield* FileSystem.FileSystem;
const path = yield* Path.Path;

const claudeJsonPath = path.join(homedir(), ".claude.json");
const claudeJson = yield* Effect.flatMap(
fileSystem.readFileString(claudeJsonPath),
Schema.decodeEffect(Schema.fromJsonString(ClaudeJsonSchema)),
);

return claudeJson.userID;
});

const upsertAnonymousId = Effect.gen(function* () {
const fileSystem = yield* FileSystem.FileSystem;
const path = yield* Path.Path;
Expand All @@ -59,14 +76,20 @@ const upsertAnonymousId = Effect.gen(function* () {
/**
* getTelemetryIdentifier - Users are "identified" by finding the first match of the following, then hashing the value.
* 1. ~/.codex/auth.json tokens.account_id
* 2. ~/.t3/telemetry/anonymous-id
* 2. ~/.claude.json userID
* 3. ~/.t3/telemetry/anonymous-id
*/
export const getTelemetryIdentifier = Effect.gen(function* () {
const codexAccountId = yield* Effect.result(getCodexAccountId);
if (codexAccountId._tag === "Success") {
return yield* hash(codexAccountId.success);
}

const claudeUserId = yield* Effect.result(getClaudeUserId);
if (claudeUserId._tag === "Success") {
return yield* hash(claudeUserId.success);
}

const anonymousId = yield* Effect.result(upsertAnonymousId);
if (anonymousId._tag === "Success") {
return yield* hash(anonymousId.success);
Expand Down