feat(ai): upgrade to Opus 4.7 with adaptive thinking (#325)

apps/cli/src/commands/setup.ts

@@ -32,7 +32,10 @@ export async function setup(): Promise<void> {
 
   const config = await setupProvider(provider as Provider);
 
-  // 2. Save config
+  // 2. Adaptive thinking
+  await maybePromptAdaptiveThinking(config);
+
+  // 3. Save config
   saveConfig(config);
 
   const configPath = path.join(SHANNON_HOME, 'config.toml');
@@ -80,7 +83,7 @@ async function setupAnthropic(): Promise<ShannonConfig> {
       'Do you want to change the default models?\n' +
       '    Small  - claude-haiku-4-5-20251001\n' +
       '    Medium - claude-sonnet-4-6\n' +
-      '    Large  - claude-opus-4-6',
+      '    Large  - claude-opus-4-7',
     initialValue: false,
   });
   if (p.isCancel(customizeModels)) return cancelAndExit();
@@ -102,7 +105,7 @@ async function setupAnthropic(): Promise<ShannonConfig> {
 
     const large = await p.text({
       message: 'Large model ID',
-      initialValue: 'claude-opus-4-6',
+      initialValue: 'claude-opus-4-7',
       validate: required('Large model ID is required'),
     });
     if (p.isCancel(large)) return cancelAndExit();
@@ -140,7 +143,7 @@ async function setupCustomBaseUrl(): Promise<ShannonConfig> {
       'Do you want to change the default models?\n' +
       '    Small  - claude-haiku-4-5-20251001\n' +
       '    Medium - claude-sonnet-4-6\n' +
-      '    Large  - claude-opus-4-6',
+      '    Large  - claude-opus-4-7',
     initialValue: false,
   });
   if (p.isCancel(customizeModels)) return cancelAndExit();
@@ -162,7 +165,7 @@ async function setupCustomBaseUrl(): Promise<ShannonConfig> {
 
     const large = await p.text({
       message: 'Large model ID',
-      initialValue: 'claude-opus-4-6',
+      initialValue: 'claude-opus-4-7',
       validate: required('Large model ID is required'),
     });
     if (p.isCancel(large)) return cancelAndExit();
@@ -199,7 +202,7 @@ async function setupBedrock(): Promise<ShannonConfig> {
 
   const large = await p.text({
     message: 'Large model ID',
-    placeholder: 'us.anthropic.claude-opus-4-6',
+    placeholder: 'us.anthropic.claude-opus-4-7',
     validate: required('Large model ID is required'),
   });
   if (p.isCancel(large)) return cancelAndExit();
@@ -262,7 +265,7 @@ async function setupVertex(): Promise<ShannonConfig> {
     large: () =>
       p.text({
         message: 'Large model ID',
-        placeholder: 'claude-opus-4-6',
+        placeholder: 'claude-opus-4-7',
         validate: required('Large model ID is required'),
       }),
   });
@@ -281,6 +284,20 @@ async function setupVertex(): Promise<ShannonConfig> {
 
 // === Helpers ===
 
+async function maybePromptAdaptiveThinking(config: ShannonConfig): Promise<void> {
+  const m = config.models;
+  const hasOpus47 = !m || [m.small, m.medium, m.large].some((v) => v && /opus-4-[67]/.test(v));
+  if (!hasOpus47) return;
+
+  const enable = await p.confirm({
+    message: 'Enable adaptive thinking on Opus 4.6/4.7? Claude decides when and how deeply to reason.',
+    initialValue: true,
+  });
+  if (p.isCancel(enable)) return cancelAndExit();
+
+  config.core = { ...config.core, adaptive_thinking: enable };
+}
+
 async function promptSecret(message: string): Promise<string> {
   const value = await p.password({
     message,

apps/cli/src/config/resolver.ts

@@ -18,12 +18,14 @@ interface ConfigMapping {
   readonly env: string;
   readonly toml: string;
   readonly type: TOMLType;
+  readonly boolFormat?: 'numeric' | 'literal';
 }
 
 /** Maps every supported env var to its TOML path (section.key) and expected type. */
 const CONFIG_MAP: readonly ConfigMapping[] = [
   // Core
   { env: 'CLAUDE_CODE_MAX_OUTPUT_TOKENS', toml: 'core.max_tokens', type: 'number' },
+  { env: 'CLAUDE_ADAPTIVE_THINKING', toml: 'core.adaptive_thinking', type: 'boolean', boolFormat: 'literal' },
 
   // Anthropic
   { env: 'ANTHROPIC_API_KEY', toml: 'anthropic.api_key', type: 'string' },
@@ -56,9 +58,9 @@ type TOMLValue = string | number | boolean;
 type TOMLSection = Record<string, TOMLValue>;
 type TOMLConfig = Record<string, TOMLSection>;
 
-/** Read a nested TOML value by dotted path (e.g. "anthropic.api_key"). */
-function getTomlValue(config: TOMLConfig, path: string): string | undefined {
-  const [section, key] = path.split('.');
+/** Read a nested TOML value for a given mapping. */
+function getTomlValue(config: TOMLConfig, mapping: ConfigMapping): string | undefined {
+  const [section, key] = mapping.toml.split('.');
   if (!section || !key) return undefined;
 
   const sectionObj = config[section];
@@ -67,8 +69,10 @@ function getTomlValue(config: TOMLConfig, path: string): string | undefined {
   const value = sectionObj[key];
   if (value === undefined || value === null) return undefined;
 
-  // NOTE: env.ts checks bedrock/vertex via `=== '1'`, so booleans must map to "1"/"0"
-  if (typeof value === 'boolean') return value ? '1' : '0';
+  if (typeof value === 'boolean') {
+    if (mapping.boolFormat === 'literal') return value ? 'true' : 'false';
+    return value ? '1' : '0';
+  }
 
   return String(value);
 }
@@ -273,7 +277,7 @@ export function resolveConfig(): void {
   for (const mapping of CONFIG_MAP) {
     if (process.env[mapping.env]) continue;
 
-    const value = getTomlValue(toml, mapping.toml);
+    const value = getTomlValue(toml, mapping);
     if (value) {
       process.env[mapping.env] = value;
     }

apps/cli/src/config/writer.ts

@@ -8,7 +8,7 @@ import { getConfigFile } from '../home.js';
 // === Types ===
 
 export interface ShannonConfig {
-  core?: { max_tokens?: number };
+  core?: { max_tokens?: number; adaptive_thinking?: boolean };
   anthropic?: { api_key?: string; oauth_token?: string };
   custom_base_url?: { base_url?: string; auth_token?: string };
   bedrock?: { use?: boolean; region?: string; token?: string };

apps/cli/src/env.ts

@@ -26,6 +26,7 @@ const FORWARD_VARS = [
   'ANTHROPIC_MEDIUM_MODEL',
   'ANTHROPIC_LARGE_MODEL',
   'CLAUDE_CODE_MAX_OUTPUT_TOKENS',
+  'CLAUDE_ADAPTIVE_THINKING',
 ] as const;
 
 /**