diff --git a/scripts/agent/run-scheduler-cycle.mjs b/scripts/agent/run-scheduler-cycle.mjs
index 5358a49..7a9b873 100644
--- a/scripts/agent/run-scheduler-cycle.mjs
+++ b/scripts/agent/run-scheduler-cycle.mjs
@@ -25,6 +25,8 @@ import {
   summarizeLockFailureReasons,
 } from './scheduler-lock.mjs';
 
+import { detectPlatform } from '../../src/utils.mjs';
+
 const VALID_CADENCES = new Set(['daily', 'weekly']);
 const ALL_EXCLUDED_REASON = 'All roster tasks currently claimed by other agents';
 const FAILURE_CATEGORY = {
@@ -35,7 +37,7 @@ const FAILURE_CATEGORY = {
 };
 
 function parseArgs(argv) {
-  const args = { cadence: null, platform: process.env.AGENT_PLATFORM || 'codex', model: process.env.AGENT_MODEL || null };
+  const args = { cadence: null, platform: process.env.AGENT_PLATFORM || detectPlatform() || 'unknown', model: process.env.AGENT_MODEL || null };
   for (let i = 0; i < argv.length; i += 1) {
     const value = argv[i];
     if (!value.startsWith('--') && !args.cadence) {
diff --git a/scripts/agent/scheduler-utils.mjs b/scripts/agent/scheduler-utils.mjs
index 5403122..cfef0d9 100644
--- a/scripts/agent/scheduler-utils.mjs
+++ b/scripts/agent/scheduler-utils.mjs
@@ -20,7 +20,12 @@ export function getSafeEnv() {
         key.startsWith('NOSTR_') ||
         key.startsWith('TORCH_') ||
         key.startsWith('SCHEDULER_') ||
-        key.startsWith('AGENT_')) {
+        key.startsWith('AGENT_') ||
+        key.startsWith('JULES_') ||
+        key.startsWith('CODEX_') ||
+        key.startsWith('CLAUDE_') ||
+        key.startsWith('ANTHROPIC_') ||
+        key.startsWith('GOOSE_')) {
       safeEnv[key] = process.env[key];
     }
   }
diff --git a/src/utils.mjs b/src/utils.mjs
index e091fa6..3c198fd 100644
--- a/src/utils.mjs
+++ b/src/utils.mjs
@@ -34,6 +34,7 @@ export function detectPlatform() {
   if (process.env.JULES_API_KEY || process.env.JULES_SESSION_ID) return 'jules';
   if (process.env.CODEX_API_KEY || process.env.CODEX_SESSION_ID) return 'codex';
   if (process.env.GOOSE_API_KEY || process.env.GOOSE_SESSION_ID) return 'goose';
+  if (process.env.CLAUDE_API_KEY || process.env.ANTHROPIC_API_KEY || process.env.CLAUDE_SESSION_ID) return 'claude';
   return null;
 }
 
diff --git a/test/utils.test.mjs b/test/utils.test.mjs
index 29f3526..0ce8d5a 100644
--- a/test/utils.test.mjs
+++ b/test/utils.test.mjs
@@ -2,7 +2,7 @@ import { describe, it, after } from 'node:test';
 import assert from 'node:assert';
 import fs from 'node:fs';
 import path from 'node:path';
-import { getIsoWeekStr, todayDateStr, nowUnix, ensureDir } from '../src/utils.mjs';
+import { getIsoWeekStr, todayDateStr, nowUnix, ensureDir, detectPlatform } from '../src/utils.mjs';
 
 describe('Date Utilities', () => {
   describe('todayDateStr', () => {
@@ -59,6 +59,64 @@ describe('Date Utilities', () => {
   });
 });
 
+describe('Platform Utilities', () => {
+  describe('detectPlatform', () => {
+    const originalEnv = { ...process.env };
+
+    // Helper to clear relevant env vars
+    const clearEnv = () => {
+      delete process.env.JULES_SESSION_ID;
+      delete process.env.JULES_API_KEY;
+      delete process.env.CODEX_SESSION_ID;
+      delete process.env.CODEX_API_KEY;
+      delete process.env.GOOSE_SESSION_ID;
+      delete process.env.GOOSE_API_KEY;
+      delete process.env.CLAUDE_SESSION_ID;
+      delete process.env.CLAUDE_API_KEY;
+      delete process.env.ANTHROPIC_API_KEY;
+    };
+
+    after(() => {
+      process.env = originalEnv;
+    });
+
+    it('detects jules', () => {
+      clearEnv();
+      process.env.JULES_SESSION_ID = 'test';
+      assert.strictEqual(detectPlatform(), 'jules');
+    });
+
+    it('detects codex', () => {
+      clearEnv();
+      process.env.CODEX_API_KEY = 'test';
+      assert.strictEqual(detectPlatform(), 'codex');
+    });
+
+    it('detects goose', () => {
+      clearEnv();
+      process.env.GOOSE_SESSION_ID = 'test';
+      assert.strictEqual(detectPlatform(), 'goose');
+    });
+
+    it('detects claude via CLAUDE_API_KEY', () => {
+      clearEnv();
+      process.env.CLAUDE_API_KEY = 'test';
+      assert.strictEqual(detectPlatform(), 'claude');
+    });
+
+    it('detects claude via ANTHROPIC_API_KEY', () => {
+      clearEnv();
+      process.env.ANTHROPIC_API_KEY = 'test';
+      assert.strictEqual(detectPlatform(), 'claude');
+    });
+
+    it('returns null if no platform detected', () => {
+      clearEnv();
+      assert.strictEqual(detectPlatform(), null);
+    });
+  });
+});
+
 describe('File Utilities', () => {
   describe('ensureDir', () => {
     const tempBase = fs.mkdtempSync(path.join(process.cwd(), 'test-utils-'));