Add support for reading Claude Code settings from ~/.claude/settings.json

src/config.ts

@@ -7,6 +7,7 @@ import { join } from 'node:path';
 import { withFallback, type FallbackEvent } from './fallback';
 import type { McpServerConfig } from './mcp';
 import { parsePermissions, type PermissionConfig } from './permission';
+import { readClaudeCodeSettings } from './providers';
 import { isToolSetName, type ToolSetName } from './tools';
 
 export type ProviderName = 'anthropic' | 'openai';
@@ -83,11 +84,23 @@ export async function loadConfig(): Promise<Config> {
   const envProvider = process.env['SHIRO_PROVIDER'];
   const provider = isProvider(envProvider) ? envProvider : isProvider(file.provider) ? file.provider : 'anthropic';
 
+  // When using the claude-code preset, read from ~/.claude/settings.json
+  const isClaudeCode = file.presetId === 'claude-code';
+  const claudeSettings = isClaudeCode ? await readClaudeCodeSettings() : {};
+
   return {
     provider,
     model: process.env['SHIRO_MODEL'] ?? file.model ?? DEFAULT_MODEL[provider],
-    baseURL: process.env['SHIRO_BASE_URL'] ?? file.baseURL ?? DEFAULT_BASE_URL[provider],
-    apiKey: process.env['SHIRO_API_KEY'] ?? file.apiKey ?? process.env[ENV_KEY[provider]],
+    baseURL:
+      process.env['SHIRO_BASE_URL'] ??
+      file.baseURL ??
+      claudeSettings.baseURL ??
+      DEFAULT_BASE_URL[provider],
+    apiKey:
+      process.env['SHIRO_API_KEY'] ??
+      file.apiKey ??
+      claudeSettings.apiKey ??
+      process.env[ENV_KEY[provider]],
     ...(file.presetId ? { presetId: file.presetId } : {}),
     ...(file.maxRetries !== undefined ? { maxRetries: file.maxRetries } : {}),
     ...(file.agent ? { agent: file.agent } : {}),

src/providers.ts

@@ -1,5 +1,31 @@
+import { homedir } from 'node:os';
+import { join } from 'node:path';
 import type { ProviderName } from './config';
 
+/**
+ * Reads ANTHROPIC_BASE_URL and ANTHROPIC_API_KEY from ~/.claude/settings.json
+ * so the claude-code preset reuses the endpoint and key Claude Code already has
+ * configured, rather than asking the user to type them again.
+ */
+export async function readClaudeCodeSettings(): Promise<{ baseURL?: string; apiKey?: string }> {
+  try {
+    const settingsPath = join(homedir(), '.claude', 'settings.json');
+    const f = Bun.file(settingsPath);
+    if (!(await f.exists())) return {};
+    const parsed: unknown = await f.json();
+    if (!parsed || typeof parsed !== 'object') return {};
+    const env = (parsed as { env?: unknown }).env;
+    if (!env || typeof env !== 'object') return {};
+    const envObj = env as Record<string, unknown>;
+    return {
+      baseURL: typeof envObj['ANTHROPIC_BASE_URL'] === 'string' ? envObj['ANTHROPIC_BASE_URL'] : undefined,
+      apiKey: typeof envObj['ANTHROPIC_API_KEY'] === 'string' ? envObj['ANTHROPIC_API_KEY'] : undefined,
+    };
+  } catch {
+    return {};
+  }
+}
+
 export type ProviderPreset = {
   id: string;
   label: string;
@@ -22,7 +48,15 @@ export const PRESETS: ProviderPreset[] = [
     baseURL: 'https://api.anthropic.com/v1',
     envKey: 'ANTHROPIC_API_KEY',
     keyHint: 'sk-ant-...',
-    fallbackModels: ['claude-sonnet-4-5', 'claude-opus-4-1', 'claude-haiku-4-5'],
+    fallbackModels: ['claude-sonnet-5', 'claude-opus-5', 'claude-haiku-4-5-20251001'],
+  },
+  {
+    id: 'claude-code',
+    label: 'Claude Code (via ~/.claude/settings.json)',
+    kind: 'anthropic',
+    baseURL: '', // Read from ~/.claude/settings.json
+    envKey: 'ANTHROPIC_API_KEY',
+    fallbackModels: ['claude-sonnet-5', 'claude-opus-5', 'claude-haiku-4-5-20251001'],
   },
   {
     id: 'openai',

src/ui/Onboard.tsx

@@ -4,7 +4,7 @@ import TextInput from 'ink-text-input';
 import Spinner from 'ink-spinner';
 import React, { useCallback, useState } from 'react';
 import type { Config, ProviderName } from '../config';
-import { fetchModels, PRESETS, type ProviderPreset } from '../providers';
+import { fetchModels, PRESETS, readClaudeCodeSettings, type ProviderPreset } from '../providers';
 
 export type OnboardResult = {
   presetId: string;
@@ -65,9 +65,9 @@ export function Onboard({
   );
 
   const afterBaseUrl = useCallback(
-    (preset: ProviderPreset, baseURL: string) => {
+    (preset: ProviderPreset, baseURL: string, settingsKey?: string) => {
       const fromEnv = preset.envKey ? process.env[preset.envKey] : undefined;
-      const key = preset.keyless ? 'local' : (fromEnv ?? '');
+      const key = preset.keyless ? 'local' : (settingsKey ?? fromEnv ?? '');
       if (key) return void loadModels(preset, baseURL, key);
       setDraft('');
       setStep({ name: 'api-key', preset, baseURL });
@@ -77,9 +77,16 @@ export function Onboard({
 
   const pickProvider = useCallback(
     (preset: ProviderPreset) => {
+      // The claude-code preset has no fixed endpoint: read the base URL and key
+      // from ~/.claude/settings.json, falling back to asking either if the file
+      // is absent or lacks the variable.
       if (preset.baseURL) return afterBaseUrl(preset, preset.baseURL);
+      void readClaudeCodeSettings().then(({ baseURL, apiKey }) =>
+        baseURL
+          ? afterBaseUrl(preset, baseURL, apiKey)
+          : setStep({ name: 'base-url', preset }),
+      );
       setDraft('');
-      setStep({ name: 'base-url', preset });
     },
     [afterBaseUrl],
   );