fix(runtime): strip inherited Anthropic routing env selectively

src/utils/shell-executor.ts

@@ -26,6 +26,28 @@ export function stripAnthropicEnv(env: NodeJS.ProcessEnv): NodeJS.ProcessEnv {
   return result;
 }
 
+const ANTHROPIC_ROUTING_ENV_KEYS = new Set([
+  'ANTHROPIC_BASE_URL',
+  'ANTHROPIC_AUTH_TOKEN',
+  'ANTHROPIC_API_KEY',
+]);
+
+/**
+ * Strip inherited Anthropic routing/auth env while preserving model intent.
+ * Used for nested settings-profile Claude launches where `--settings` already
+ * defines the provider transport and the parent process should only lend model
+ * defaults or effort hints.
+ */
+export function stripAnthropicRoutingEnv(env: NodeJS.ProcessEnv): NodeJS.ProcessEnv {
+  const result: NodeJS.ProcessEnv = {};
+  for (const key of Object.keys(env)) {
+    if (!ANTHROPIC_ROUTING_ENV_KEYS.has(key)) {
+      result[key] = env[key];
+    }
+  }
+  return result;
+}
+
 /**
  * Strip Claude Code nested-session guard env var from a process environment.
  *
@@ -137,14 +159,18 @@ export function execClaude(
   const webSearchEnv = getWebSearchHookEnv();
   const claudeLaunchEnv = getClaudeLaunchEnvOverrides();
 
-  // For account/default profiles, strip ANTHROPIC_* from parent env to prevent
-  // stale proxy config (e.g., from prior CLIProxy sessions) from interfering
-  // with native Claude API routing. Settings-based profiles explicitly inject
-  // their own ANTHROPIC_* values, so they don't need this protection.
+  // Strip inherited ANTHROPIC_* when the launch should not reuse parent routing.
+  // Account/default profiles need full isolation from prior proxy sessions.
+  // Settings profiles can selectively strip only routing/auth when `--settings`
+  // already carries the provider source of truth but the parent model intent
+  // should still flow into nested Team/subagent launches.
   const profileType = envVars?.CCS_PROFILE_TYPE;
-  const baseEnv =
-    profileType === 'account' || profileType === 'default'
-      ? stripAnthropicEnv(process.env)
+  const stripInheritedAnthropicEnv = profileType === 'account' || profileType === 'default';
+  const stripInheritedAnthropicRoutingEnv = envVars?.CCS_STRIP_INHERITED_ANTHROPIC_ENV === '1';
+  const baseEnv = stripInheritedAnthropicEnv
+    ? stripAnthropicEnv(process.env)
+    : stripInheritedAnthropicRoutingEnv
+      ? stripAnthropicRoutingEnv(process.env)
       : process.env;
 
   // Prepare environment (merge with base env if envVars provided)

tests/unit/utils/claudecode-env-stripping.test.ts

@@ -336,6 +336,37 @@ describe('CLAUDECODE environment stripping', () => {
     expect(normalizeSpy).toHaveBeenCalledWith(instancePath);
   });
 
+  it('execClaude strips inherited ANTHROPIC routing env but keeps model intent for settings-profile Claude launches', () => {
+    process.env.ANTHROPIC_BASE_URL = 'http://127.0.0.1:8317/api/provider/codex';
+    process.env.ANTHROPIC_AUTH_TOKEN = 'ccs-internal-managed';
+    process.env.ANTHROPIC_API_KEY = 'stale-api-key';
+    process.env.ANTHROPIC_MODEL = 'gpt-5.4';
+    process.env.ANTHROPIC_DEFAULT_OPUS_MODEL = 'gpt-5.4';
+    process.env.ANTHROPIC_DEFAULT_SONNET_MODEL = 'gpt-5.4';
+    process.env.ANTHROPIC_DEFAULT_HAIKU_MODEL = 'gpt-5.4-mini';
+    process.env.ANTHROPIC_SMALL_FAST_MODEL = 'gpt-5-codex-mini';
+
+    execClaude('claude', ['--help'], {
+      CCS_PROFILE_TYPE: 'settings',
+      CCS_STRIP_INHERITED_ANTHROPIC_ENV: '1',
+      CLAUDE_CONFIG_DIR: path.join(os.tmpdir(), 'ccs-settings-profile-instance'),
+      CCS_WEBSEARCH_SKIP: '1',
+    });
+
+    expect(spawnCalls.length).toBeGreaterThan(0);
+    const env = spawnCalls[0].options?.env as NodeJS.ProcessEnv;
+    expect(env.CCS_PROFILE_TYPE).toBe('settings');
+    expect(env.CLAUDE_CONFIG_DIR).toContain('ccs-settings-profile-instance');
+    expect(env.ANTHROPIC_BASE_URL).toBeUndefined();
+    expect(env.ANTHROPIC_AUTH_TOKEN).toBeUndefined();
+    expect(env.ANTHROPIC_API_KEY).toBeUndefined();
+    expect(env.ANTHROPIC_MODEL).toBe('gpt-5.4');
+    expect(env.ANTHROPIC_DEFAULT_OPUS_MODEL).toBe('gpt-5.4');
+    expect(env.ANTHROPIC_DEFAULT_SONNET_MODEL).toBe('gpt-5.4');
+    expect(env.ANTHROPIC_DEFAULT_HAIKU_MODEL).toBe('gpt-5.4-mini');
+    expect(env.ANTHROPIC_SMALL_FAST_MODEL).toBe('gpt-5-codex-mini');
+  });
+
   it('headless executor spawn path strips CLAUDECODE before spawn', async () => {
     writeConfigWithAutoUpdatePreference(false);
     process.env.CLAUDECODE = 'nested';