From d77963fb3f539bc6210a1353cbc78e0cf9526f3e Mon Sep 17 00:00:00 2001
From: Askhz <1361267452@qq.com>
Date: Tue, 7 Apr 2026 20:32:32 +0800
Subject: [PATCH] feat: add costrict login provider

---
 src/components/ConsoleOAuthFlow.tsx   | 140 +++++++++++++++-
 src/costrict/provider/auth.ts         | 191 ++++++++++++++++++++++
 src/costrict/provider/credentials.ts  | 104 ++++++++++++
 src/costrict/provider/fetch.ts        | 122 ++++++++++++++
 src/costrict/provider/index.ts        | 225 ++++++++++++++++++++++++++
 src/costrict/provider/modelMapping.ts |  48 ++++++
 src/costrict/provider/models.ts       |  83 ++++++++++
 src/costrict/provider/oauth-params.ts |  58 +++++++
 src/costrict/provider/token.ts        | 119 ++++++++++++++
 src/services/api/claude.ts            |   6 +
 src/setup.ts                          |  63 ++++++++
 src/utils/model/modelOptions.ts       |  30 ++++
 src/utils/model/providers.ts          |   3 +
 src/utils/settings/types.ts           |   4 +-
 14 files changed, 1189 insertions(+), 7 deletions(-)
 create mode 100644 src/costrict/provider/auth.ts
 create mode 100644 src/costrict/provider/credentials.ts
 create mode 100644 src/costrict/provider/fetch.ts
 create mode 100644 src/costrict/provider/index.ts
 create mode 100644 src/costrict/provider/modelMapping.ts
 create mode 100644 src/costrict/provider/models.ts
 create mode 100644 src/costrict/provider/oauth-params.ts
 create mode 100644 src/costrict/provider/token.ts

diff --git a/src/components/ConsoleOAuthFlow.tsx b/src/components/ConsoleOAuthFlow.tsx
index 5264b32b3..4ce66cabe 100644
--- a/src/components/ConsoleOAuthFlow.tsx
+++ b/src/components/ConsoleOAuthFlow.tsx
@@ -16,7 +16,8 @@ import { getSettings_DEPRECATED, updateSettingsForSource } from '../utils/settin
 import { Select } from './CustomSelect/select.js'
 import { Spinner } from './Spinner.js'
 import TextInput from './TextInput.js'
-import { fi } from 'zod/v4/locales'
+import { ModelPicker } from './ModelPicker.js'
+import { useSetAppState } from '../state/AppState.js'
 
 type Props = {
   onDone(): void
@@ -28,6 +29,14 @@ type Props = {
 type OAuthStatus =
   | { state: 'idle' } // Initial state, waiting to select login method
   | { state: 'platform_setup' } // Show platform setup info (Bedrock/Vertex/Foundry)
+  | {
+      state: 'costrict_waiting'
+      url: string
+    } // CoStrict OAuth: browser opened, waiting for user to login
+  | {
+      state: 'costrict_model_select'
+      models: Array<{ id: string; name?: string }>
+    } // CoStrict: login done, select a model
   | {
       state: 'custom_platform'
       baseUrl: string
@@ -73,6 +82,7 @@ export function ConsoleOAuthFlow({
   mode = 'login',
   forceLoginMethod: forceLoginMethodProp,
 }: Props): React.ReactNode {
+  const setAppState = useSetAppState()
   const settings = getSettings_DEPRECATED() || {}
   const forceLoginMethod = forceLoginMethodProp ?? settings.forceLoginMethod
   const orgUUID = settings.forceLoginOrgUUID
@@ -273,6 +283,8 @@ export function ConsoleOAuthFlow({
         }
         // Reset modelType to anthropic when using OAuth login
         updateSettingsForSource('userSettings', { modelType: 'anthropic' } as any)
+        delete process.env.CLAUDE_CODE_USE_COSTRICT
+        setAppState(prev => ({ ...prev, mainLoopModel: null, mainLoopModelForSession: null }))
 
         setOAuthStatus({ state: 'success' })
         void sendNotification(
@@ -438,6 +450,7 @@ function OAuthStatusMessage({
   setLoginWithClaudeAi,
   onDone,
 }: OAuthStatusMessageProps): React.ReactNode {
+  const setAppState = useSetAppState()
   switch (oauthStatus.state) {
     case 'idle':
       return (
@@ -453,6 +466,16 @@ function OAuthStatusMessage({
           <Box>
             <Select
               options={[
+                {
+                  label: (
+                    <Text>
+                      CoStrict ·{' '}
+                      <Text dimColor>Sign in with CoStrict account</Text>
+                      {'\n'}
+                    </Text>
+                  ),
+                  value: 'costrict',
+                },
                 {
                   label: (
                     <Text>
@@ -530,7 +553,70 @@ function OAuthStatusMessage({
                 },
               ]}
               onChange={value => {
-                if (value === 'custom_platform') {
+                if (value === 'costrict') {
+                  void (async () => {
+                    try {
+                      const { generateState, getCoStrictBaseURL, buildCoStrictLoginURL, pollLoginToken } = await import('../costrict/provider/auth.js')
+                      const { generateMachineId, saveCoStrictCredentials } = await import('../costrict/provider/credentials.js')
+                      const { extractExpiryFromJWT } = await import('../costrict/provider/token.js')
+                      const { updateSettingsForSource } = await import('../utils/settings/settings.js')
+
+                      const baseUrl = getCoStrictBaseURL()
+                      const state = generateState()
+                      const machineId = generateMachineId()
+                      const loginUrl = buildCoStrictLoginURL(baseUrl, state, machineId)
+
+                      // 打开浏览器（复用 csc 的 openBrowser，Windows 用 rundll32 url,OpenURL 避免 & 被 cmd.exe 截断）
+                      const { openBrowser } = await import('../utils/browser.js')
+                      await openBrowser(loginUrl)
+
+                      setOAuthStatus({ state: 'costrict_waiting', url: loginUrl })
+
+                      // 轮询等待登录完成
+                      const tokens = await pollLoginToken(baseUrl, state, machineId)
+
+                      // 保存凭证
+                      const expiryDate = extractExpiryFromJWT(tokens.access_token)
+                      await saveCoStrictCredentials({
+                        id: 'csc',
+                        name: 'CSC Auth',
+                        access_token: tokens.access_token,
+                        refresh_token: tokens.refresh_token,
+                        state,
+                        machine_id: machineId,
+                        base_url: baseUrl,
+                        expiry_date: expiryDate,
+                        updated_at: new Date().toISOString(),
+                        expired_at: expiryDate ? new Date(expiryDate).toISOString() : undefined,
+                      })
+
+                      // 设置 modelType 为 costrict
+                      updateSettingsForSource('userSettings', { modelType: 'costrict' as any } as any)
+                      process.env.CLAUDE_CODE_USE_COSTRICT = '1'
+
+                      // 预取模型列表，填充同步缓存，并进入模型选择界面
+                      try {
+                        const { fetchCoStrictModels } = await import('../costrict/provider/models.js')
+                        const models = await fetchCoStrictModels(baseUrl, tokens.access_token)
+                        if (models.length > 0) {
+                          setOAuthStatus({ state: 'costrict_model_select', models })
+                          return
+                        }
+                      } catch {
+                        // 预取失败，直接进入 success
+                      }
+
+                      setOAuthStatus({ state: 'success' })
+                      void onDone()
+                    } catch (err: any) {
+                      setOAuthStatus({
+                        state: 'error',
+                        message: err.message || String(err),
+                        toRetry: { state: 'idle' },
+                      })
+                    }
+                  })()
+                } else if (value === 'custom_platform') {
                   logEvent('tengu_custom_platform_selected', {})
                   setOAuthStatus({
                     state: 'custom_platform',
@@ -696,10 +782,12 @@ function OAuthStatusMessage({
             })
           } else {
             for (const [k, v] of Object.entries(env)) process.env[k] = v
+            delete process.env.CLAUDE_CODE_USE_COSTRICT
+            setAppState(prev => ({ ...prev, mainLoopModel: null, mainLoopModelForSession: null }))
             setOAuthStatus({ state: 'success' })
             void onDone()
           }
-        }, [activeField, inputValue, displayValues, setOAuthStatus, onDone])
+        }, [activeField, inputValue, displayValues, setOAuthStatus, onDone, setAppState])
 
         const handleEnter = useCallback(() => {
           const idx = FIELDS.indexOf(activeField)
@@ -916,10 +1004,12 @@ function OAuthStatusMessage({
             })
           } else {
             for (const [k, v] of Object.entries(env)) process.env[k] = v
+            delete process.env.CLAUDE_CODE_USE_COSTRICT
+            setAppState(prev => ({ ...prev, mainLoopModel: null, mainLoopModelForSession: null }))
             setOAuthStatus({ state: 'success' })
             void onDone()
           }
-        }, [activeField, openaiInputValue, openaiDisplayValues, setOAuthStatus, onDone])
+        }, [activeField, openaiInputValue, openaiDisplayValues, setOAuthStatus, onDone, setAppState])
 
         const handleOpenAIEnter = useCallback(() => {
           const idx = OPENAI_FIELDS.indexOf(activeField)
@@ -1149,10 +1239,12 @@ function OAuthStatusMessage({
             })
           } else {
             for (const [k, v] of Object.entries(env)) process.env[k] = v
+            delete process.env.CLAUDE_CODE_USE_COSTRICT
+            setAppState(prev => ({ ...prev, mainLoopModel: null, mainLoopModelForSession: null }))
             setOAuthStatus({ state: 'success' })
             void onDone()
           }
-        }, [activeField, geminiInputValue, geminiDisplayValues, onDone, setOAuthStatus])
+        }, [activeField, geminiInputValue, geminiDisplayValues, onDone, setOAuthStatus, setAppState])
 
         const handleGeminiEnter = useCallback(() => {
           const idx = GEMINI_FIELDS.indexOf(activeField)
@@ -1275,6 +1367,44 @@ function OAuthStatusMessage({
         )
       }
 
+    case 'costrict_waiting':
+      return (
+        <Box flexDirection="column" gap={1}>
+          <Text>
+            Opening browser for CoStrict login. If it does not open
+            automatically, copy and paste this URL:
+          </Text>
+          <Box marginY={1}>
+            <Text color="cyan">{oauthStatus.url}</Text>
+          </Box>
+          <Text dimColor>Waiting for authentication...</Text>
+        </Box>
+      )
+
+    case 'costrict_model_select': {
+      const sortedModels = [...oauthStatus.models].sort((a, b) => a.id.localeCompare(b.id))
+      return (
+        <ModelPicker
+          initial={sortedModels[0]?.id ?? null}
+          headerText="Login successful. Select a CoStrict model to use:"
+          onSelect={(model) => {
+            const selected = model ?? sortedModels[0]?.id ?? ''
+            process.env.COSTRICT_MODEL = selected
+            setAppState(prev => ({ ...prev, mainLoopModel: selected, mainLoopModelForSession: null }))
+            setOAuthStatus({ state: 'success' })
+            void onDone()
+          }}
+          onCancel={() => {
+            const selected = sortedModels[0]?.id ?? ''
+            process.env.COSTRICT_MODEL = selected
+            setAppState(prev => ({ ...prev, mainLoopModel: selected, mainLoopModelForSession: null }))
+            setOAuthStatus({ state: 'success' })
+            void onDone()
+          }}
+        />
+      )
+    }
+
     case 'platform_setup':
       return (
         <Box flexDirection="column" gap={1} marginTop={1}>
diff --git a/src/costrict/provider/auth.ts b/src/costrict/provider/auth.ts
new file mode 100644
index 000000000..9344db0b4
--- /dev/null
+++ b/src/costrict/provider/auth.ts
@@ -0,0 +1,191 @@
+/**
+ * CoStrict OAuth 登录流程模块
+ * 负责浏览器登录、Token 轮询和登录 URL 构建
+ */
+
+import { randomBytes } from 'node:crypto'
+import {
+  generateMachineId,
+  saveCoStrictCredentials,
+  type CoStrictCredentials,
+} from './credentials.js'
+import { extractExpiryFromJWT } from './token.js'
+import { buildOAuthParams } from './oauth-params.js'
+
+/**
+ * 生成随机 state 字符串 (格式: {12hex}.{12hex})
+ */
+export function generateState(): string {
+  const part1 = randomBytes(6).toString('hex')
+  const part2 = randomBytes(6).toString('hex')
+  return `${part1}.${part2}`
+}
+
+/**
+ * 获取 CoStrict Base URL
+ * 优先级: 环境变量 > credentialsBaseUrl > 默认值
+ */
+export function getCoStrictBaseURL(credentialsBaseUrl?: string): string {
+  const envUrl = process.env.COSTRICT_BASE_URL
+  const defaultUrl = 'https://zgsm.sangfor.com'
+  const baseUrl = envUrl || credentialsBaseUrl || defaultUrl
+  return baseUrl.replace(/\/chat-rag\/api\/v1$/, '').replace(/\/$/, '')
+}
+
+/**
+ * 构建 CoStrict 登录 URL (初次登录包含 machine_code)
+ */
+export function buildCoStrictLoginURL(
+  baseUrl: string,
+  state: string,
+  machineId: string,
+): string {
+  const params = buildOAuthParams(true, machineId, state)
+  const queryString = params
+    .map(([k, v]) => `${k}=${encodeURIComponent(v)}`)
+    .join('&')
+  return `${baseUrl}/oidc-auth/api/v1/plugin/login?${queryString}`
+}
+
+/**
+ * 轮询 Token 端点获取登录凭证 (轮询时保留 machine_code)
+ */
+export async function pollLoginToken(
+  baseUrl: string,
+  state: string,
+  machineId: string,
+  maxAttempts = 120,
+  intervalMs = 5000,
+  abortSignal?: AbortSignal,
+): Promise<{ access_token: string; refresh_token: string }> {
+  const params = buildOAuthParams(true, machineId, state)
+  const queryString = params
+    .map(([k, v]) => `${k}=${encodeURIComponent(v)}`)
+    .join('&')
+  const url = `${baseUrl}/oidc-auth/api/v1/plugin/login/token?${queryString}`
+
+  const sleep = (ms: number) => new Promise(resolve => setTimeout(resolve, ms))
+
+  for (let attempt = 0; attempt < maxAttempts; attempt++) {
+    if (abortSignal?.aborted) throw new Error('Login cancelled by user')
+
+    await sleep(intervalMs)
+
+    try {
+      const response = await fetch(url, {
+        method: 'GET',
+        headers: { Accept: 'application/json' },
+        signal: abortSignal,
+      })
+
+      if (!response.ok) continue
+
+      const result = (await response.json()) as any
+
+      if (!result.success) {
+        const errorMsg = result.message || result.error || 'Unknown error'
+        if (
+          errorMsg.includes('invalid') ||
+          errorMsg.includes('expired') ||
+          errorMsg.includes('failed')
+        ) {
+          throw new Error(`Login failed: ${errorMsg}`)
+        }
+        continue
+      }
+
+      if (
+        !result.data?.access_token ||
+        !result.data?.refresh_token ||
+        result.data.access_token === '' ||
+        result.data.refresh_token === ''
+      ) {
+        continue
+      }
+
+      if (result.data.state !== state) continue
+
+      return {
+        access_token: result.data.access_token,
+        refresh_token: result.data.refresh_token,
+      }
+    } catch (error: any) {
+      if (error.name === 'AbortError' || error.message?.includes('aborted')) {
+        throw new Error('Login cancelled')
+      }
+      if (error.message?.includes('Login failed')) throw error
+      continue
+    }
+  }
+
+  throw new Error(
+    `Login timeout after ${(maxAttempts * intervalMs) / 1000} seconds. Please try again.`,
+  )
+}
+
+/**
+ * 执行完整的 CoStrict OAuth 登录流程
+ *
+ * 步骤:
+ * 1. 生成 state 和 machine_id
+ * 2. 打开浏览器
+ * 3. 轮询 Token 端点
+ * 4. 保存凭证到 ~/.costrict/share/auth.json
+ */
+export async function loginCoStrict(
+  openBrowser?: (url: string) => Promise<void>,
+  abortSignal?: AbortSignal,
+): Promise<CoStrictCredentials> {
+  const baseUrl = getCoStrictBaseURL()
+  const state = generateState()
+  const machineId = generateMachineId()
+  const loginUrl = buildCoStrictLoginURL(baseUrl, state, machineId)
+
+  if (openBrowser) {
+    await openBrowser(loginUrl)
+  } else {
+    const { spawn } = await import('node:child_process')
+    const platform = process.platform
+    let command: string
+    let args: string[]
+
+    if (platform === 'darwin') {
+      command = 'open'
+      args = [loginUrl]
+    } else if (platform === 'win32') {
+      command = 'cmd.exe'
+      args = ['/c', 'start', '', loginUrl]
+    } else {
+      command = 'xdg-open'
+      args = [loginUrl]
+    }
+
+    spawn(command, args, { detached: true, stdio: 'ignore' }).unref()
+  }
+
+  const tokens = await pollLoginToken(
+    baseUrl,
+    state,
+    machineId,
+    120,
+    5000,
+    abortSignal,
+  )
+
+  const expiryDate = extractExpiryFromJWT(tokens.access_token)
+  const credentials: CoStrictCredentials = {
+    id: 'csc',
+    name: 'CSC Auth',
+    access_token: tokens.access_token,
+    refresh_token: tokens.refresh_token,
+    state,
+    machine_id: machineId,
+    base_url: baseUrl,
+    expiry_date: expiryDate,
+    updated_at: new Date().toISOString(),
+    expired_at: expiryDate ? new Date(expiryDate).toISOString() : undefined,
+  }
+
+  await saveCoStrictCredentials(credentials)
+  return credentials
+}
diff --git a/src/costrict/provider/credentials.ts b/src/costrict/provider/credentials.ts
new file mode 100644
index 000000000..5bc58f80c
--- /dev/null
+++ b/src/costrict/provider/credentials.ts
@@ -0,0 +1,104 @@
+/**
+ * CoStrict 凭证管理模块
+ * 负责读写 ~/.costrict/share/auth.json，与 CoStrict IDE 插件共享凭证
+ */
+
+import { promises as fs } from 'node:fs'
+import { join } from 'node:path'
+import { homedir } from 'node:os'
+import { createHash } from 'node:crypto'
+
+/**
+ * CoStrict 凭证格式 (与 IDE 插件兼容)
+ */
+export interface CoStrictCredentials {
+  id: string // 标识符
+  name: string // 显示名称
+  access_token: string // OAuth 访问令牌
+  refresh_token?: string // OAuth 刷新令牌 (可选)
+  state?: string // OAuth 状态标识 (可选)
+  machine_id: string // 机器唯一标识 (SHA256)
+  base_url: string // CoStrict 服务器地址
+  expiry_date: number // Token 过期时间戳 (毫秒)
+  updated_at: string // 最后更新时间 (ISO 8601)
+  expired_at?: string // Token 过期时间 (ISO 8601)
+}
+
+/**
+ * 获取 CoStrict 凭证文件路径
+ * @returns ~/.costrict/share/auth.json
+ */
+export function getCoStrictCredentialsPath(): string {
+  return join(homedir(), '.costrict', 'share', 'auth.json')
+}
+
+/**
+ * 生成机器唯一标识 (SHA256)
+ * 基于平台、主机名、用户名
+ */
+export function generateMachineId(): string {
+  const os = require('node:os')
+  const platform = os.platform()
+  const hostname = os.hostname()
+  const username = os.userInfo().username
+  const machineInfo = `${platform}-${hostname}-${username}`
+  return createHash('sha256').update(machineInfo).digest('hex')
+}
+
+/**
+ * 加载 CoStrict 凭证
+ * @returns 凭证对象或 null
+ */
+export async function loadCoStrictCredentials(): Promise<CoStrictCredentials | null> {
+  try {
+    const filepath = getCoStrictCredentialsPath()
+    const content = await fs.readFile(filepath, 'utf-8')
+    const credentials = JSON.parse(content) as CoStrictCredentials
+
+    if (!credentials.access_token || !credentials.base_url) {
+      return null
+    }
+
+    return credentials
+  } catch (error: any) {
+    if (error.code === 'ENOENT') return null
+    if (error instanceof SyntaxError) return null
+    return null
+  }
+}
+
+/**
+ * 保存 CoStrict 凭证
+ */
+export async function saveCoStrictCredentials(
+  credentials: CoStrictCredentials,
+): Promise<void> {
+  const filepath = getCoStrictCredentialsPath()
+  const dir = join(homedir(), '.costrict', 'share')
+  await fs.mkdir(dir, { recursive: true, mode: 0o755 })
+  const content = JSON.stringify(credentials, null, 2)
+  await fs.writeFile(filepath, content, { encoding: 'utf-8', mode: 0o600 })
+}
+
+/**
+ * 删除 CoStrict 凭证
+ */
+export async function deleteCoStrictCredentials(): Promise<void> {
+  try {
+    await fs.unlink(getCoStrictCredentialsPath())
+  } catch (error: any) {
+    if (error.code !== 'ENOENT') throw error
+  }
+}
+
+/**
+ * 检查 CoStrict 凭证是否存在
+ */
+export async function hasCoStrictCredentials(): Promise<boolean> {
+  try {
+    await fs.access(getCoStrictCredentialsPath())
+    return true
+  } catch {
+    return false
+  }
+}
diff --git a/src/costrict/provider/fetch.ts b/src/costrict/provider/fetch.ts
new file mode 100644
index 000000000..73cfd7f1a
--- /dev/null
+++ b/src/costrict/provider/fetch.ts
@@ -0,0 +1,122 @@
+/**
+ * CoStrict 自定义 fetch 模块
+ * 动态注入 Authorization header 并处理 token 刷新
+ */
+
+import { randomUUID } from 'node:crypto'
+import {
+  loadCoStrictCredentials,
+  saveCoStrictCredentials,
+} from './credentials.js'
+import {
+  isCoStrictTokenValid,
+  refreshCoStrictToken,
+  extractExpiryFromJWT,
+} from './token.js'
+
+import { createRequire } from 'module'
+
+function getVersion(): string {
+  try {
+    if (typeof MACRO !== 'undefined' && MACRO.VERSION) return MACRO.VERSION
+  } catch { /* ignore */ }
+  try {
+    const require = createRequire(import.meta.url)
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    const pkg = require('../../../package.json') as { version: string }
+    return pkg.version
+  } catch {
+    return '1.0.0'
+  }
+}
+
+const VERSION = getVersion()
+
+/**
+ * 创建自定义 fetch 函数，用于 CoStrict API 请求
+ *
+ * 功能:
+ * 1. 动态读取凭证
+ * 2. 预防性 Token 刷新（请求前检查）
+ * 3. 注入 Authorization 和 CoStrict 特有 headers
+ * 4. 反应性 401 错误恢复（自动重试一次）
+ */
+export function createCoStrictFetch(): typeof fetch {
+  return async (input: RequestInfo | URL, init?: RequestInit) => {
+    // ========== 步骤 1: 动态读取凭证 ==========
+    let creds = await loadCoStrictCredentials()
+
+    if (!creds) {
+      throw new Error(
+        'CoStrict credentials not found. Please run /costrict-login first.',
+      )
+    }
+
+    // ========== 步骤 2: 预防性 Token 刷新 ==========
+    if (creds.refresh_token && !isCoStrictTokenValid(creds)) {
+      try {
+        const refreshed = await refreshCoStrictToken({
+          baseUrl: creds.base_url,
+          refreshToken: creds.refresh_token,
+          state: creds.state,
+        })
+        const updatedCreds = {
+          ...creds,
+          access_token: refreshed.access_token,
+          refresh_token: refreshed.refresh_token,
+          expiry_date: extractExpiryFromJWT(refreshed.access_token),
+          updated_at: new Date().toISOString(),
+          expired_at: new Date(
+            extractExpiryFromJWT(refreshed.access_token),
+          ).toISOString(),
+        }
+        await saveCoStrictCredentials(updatedCreds)
+        creds = updatedCreds
+      } catch {
+        // 刷新失败，继续使用旧 token 尝试
+      }
+    }
+
+    // ========== 步骤 3: 构建 headers ==========
+    const headers = new Headers(init?.headers)
+    headers.set('Authorization', `Bearer ${creds.access_token}`)
+    headers.set('HTTP-Referer', 'https://github.com/zgsm-ai/costrict-cli')
+    headers.set('X-Title', 'CoStrict-CLI')
+    headers.set('X-Costrict-Version', `costrict-cli-${VERSION}`)
+    headers.set('X-Request-ID', randomUUID())
+    headers.set('zgsm-client-id', creds.machine_id)
+    headers.set('zgsm-client-ide', 'cli')
+
+    // ========== 步骤 4: 发起请求 ==========
+    const response = await fetch(input, { ...init, headers })
+
+    // ========== 步骤 5: 反应性 401 恢复 ==========
+    if (response.status === 401 && creds.refresh_token) {
+      try {
+        const refreshed = await refreshCoStrictToken({
+          baseUrl: creds.base_url,
+          refreshToken: creds.refresh_token,
+          state: creds.state,
+        })
+        const updatedCreds = {
+          ...creds,
+          access_token: refreshed.access_token,
+          refresh_token: refreshed.refresh_token,
+          expiry_date: extractExpiryFromJWT(refreshed.access_token),
+          updated_at: new Date().toISOString(),
+          expired_at: new Date(
+            extractExpiryFromJWT(refreshed.access_token),
+          ).toISOString(),
+        }
+        await saveCoStrictCredentials(updatedCreds)
+        headers.set('Authorization', `Bearer ${refreshed.access_token}`)
+        headers.set('X-Request-ID', randomUUID())
+        return fetch(input, { ...init, headers })
+      } catch {
+        // 重试失败，返回原始 401 响应
+      }
+    }
+
+    return response
+  }
+}
diff --git a/src/costrict/provider/index.ts b/src/costrict/provider/index.ts
new file mode 100644
index 000000000..69faf495b
--- /dev/null
+++ b/src/costrict/provider/index.ts
@@ -0,0 +1,225 @@
+/**
+ * CoStrict 查询入口
+ * 复用 OpenAI 兼容路径，注入 CoStrict 自定义 fetch 和 baseURL
+ */
+
+import type { BetaToolUnion } from '@anthropic-ai/sdk/resources/beta/messages/messages.mjs'
+import type { SystemPrompt } from '../../utils/systemPromptType.js'
+import type {
+  Message,
+  StreamEvent,
+  SystemAPIErrorMessage,
+  AssistantMessage,
+} from '../../types/message.js'
+import type { Tools } from '../../Tool.js'
+import type { Options } from '../../services/api/claude.js'
+import OpenAI from 'openai'
+import { getProxyFetchOptions } from '../../utils/proxy.js'
+import { anthropicMessagesToOpenAI } from '../../services/api/openai/convertMessages.js'
+import {
+  anthropicToolsToOpenAI,
+  anthropicToolChoiceToOpenAI,
+} from '../../services/api/openai/convertTools.js'
+import { adaptOpenAIStreamToAnthropic } from '../../services/api/openai/streamAdapter.js'
+import { normalizeMessagesForAPI } from '../../utils/messages.js'
+import { toolToAPISchema } from '../../utils/api.js'
+import { logForDebugging } from '../../utils/debug.js'
+import { addToTotalSessionCost } from '../../cost-tracker.js'
+import { calculateUSDCost } from '../../utils/modelCost.js'
+import {
+  createAssistantAPIErrorMessage,
+  normalizeContentFromAPI,
+} from '../../utils/messages.js'
+import { randomUUID } from 'crypto'
+import { createCoStrictFetch } from './fetch.js'
+import { resolveCoStrictModel } from './modelMapping.js'
+import { getCoStrictBaseURL } from './auth.js'
+import { loadCoStrictCredentials } from './credentials.js'
+
+/**
+ * CoStrict 查询路径
+ * 与 queryModelOpenAI 结构相同，使用 CoStrict 自定义 fetch 和 baseURL
+ */
+export async function* queryModelCoStrict(
+  messages: Message[],
+  systemPrompt: SystemPrompt,
+  tools: Tools,
+  signal: AbortSignal,
+  options: Options,
+): AsyncGenerator<StreamEvent | AssistantMessage | SystemAPIErrorMessage, void> {
+  try {
+    // 1. 解析模型名
+    const costrictModel = resolveCoStrictModel(options.model)
+
+    // 2. 获取 CoStrict base URL
+    const creds = await loadCoStrictCredentials()
+    const baseUrl = getCoStrictBaseURL(creds?.base_url)
+    const chatBaseURL = `${baseUrl}/chat-rag/api/v1`
+
+    // 3. 规范化消息
+    const messagesForAPI = normalizeMessagesForAPI(messages, tools)
+
+    // 4. 构建工具 schema
+    const toolSchemas = await Promise.all(
+      tools.map(tool =>
+        toolToAPISchema(tool, {
+          getToolPermissionContext: options.getToolPermissionContext,
+          tools,
+          agents: options.agents,
+          allowedAgentTypes: options.allowedAgentTypes,
+          model: options.model,
+        }),
+      ),
+    )
+    const standardTools = toolSchemas.filter(
+      (t): t is BetaToolUnion & { type: string } => {
+        const anyT = t as Record<string, unknown>
+        return (
+          anyT.type !== 'advisor_20260301' && anyT.type !== 'computer_20250124'
+        )
+      },
+    )
+
+    // 5. 转换为 OpenAI 格式
+    const openaiMessages = anthropicMessagesToOpenAI(messagesForAPI, systemPrompt)
+    const openaiTools = anthropicToolsToOpenAI(standardTools)
+    const openaiToolChoice = anthropicToolChoiceToOpenAI(options.toolChoice)
+
+    // 6. 创建专用的 CoStrict OpenAI 客户端（不缓存，每次使用新的 fetch）
+    const costrictFetch = createCoStrictFetch()
+    const client = new OpenAI({
+      apiKey: 'costrict-managed', // 实际 token 由 createCoStrictFetch 注入
+      baseURL: chatBaseURL,
+      maxRetries: 0,
+      timeout: parseInt(process.env.API_TIMEOUT_MS || String(600 * 1000), 10),
+      dangerouslyAllowBrowser: true,
+      fetchOptions: getProxyFetchOptions({ forAnthropicAPI: false }) as RequestInit,
+      fetch: costrictFetch as any,
+    })
+
+    logForDebugging(
+      `[CoStrict] model=${costrictModel}, baseURL=${chatBaseURL}, messages=${openaiMessages.length}, tools=${openaiTools.length}`,
+    )
+
+    // 7. 调用 API（流式）
+    const stream = await client.chat.completions.create(
+      {
+        model: costrictModel,
+        messages: openaiMessages,
+        ...(openaiTools.length > 0 && {
+          tools: openaiTools,
+          ...(openaiToolChoice && { tool_choice: openaiToolChoice }),
+        }),
+        stream: true,
+        stream_options: { include_usage: true },
+        ...(options.temperatureOverride !== undefined && {
+          temperature: options.temperatureOverride,
+        }),
+      },
+      { signal },
+    )
+
+    // 8. 转换流并 yield 事件
+    const adaptedStream = adaptOpenAIStreamToAnthropic(stream, costrictModel)
+
+    const contentBlocks: Record<number, any> = {}
+    let partialMessage: any = undefined
+    let usage = {
+      input_tokens: 0,
+      output_tokens: 0,
+      cache_creation_input_tokens: 0,
+      cache_read_input_tokens: 0,
+    }
+    let ttftMs = 0
+    const start = Date.now()
+
+    for await (const event of adaptedStream) {
+      switch (event.type) {
+        case 'message_start': {
+          partialMessage = (event as any).message
+          ttftMs = Date.now() - start
+          if ((event as any).message?.usage) {
+            usage = { ...usage, ...((event as any).message.usage) }
+          }
+          break
+        }
+        case 'content_block_start': {
+          const idx = (event as any).index
+          const cb = (event as any).content_block
+          if (cb.type === 'tool_use') {
+            contentBlocks[idx] = { ...cb, input: '' }
+          } else if (cb.type === 'text') {
+            contentBlocks[idx] = { ...cb, text: '' }
+          } else if (cb.type === 'thinking') {
+            contentBlocks[idx] = { ...cb, thinking: '', signature: '' }
+          } else {
+            contentBlocks[idx] = { ...cb }
+          }
+          break
+        }
+        case 'content_block_delta': {
+          const idx = (event as any).index
+          const delta = (event as any).delta
+          const block = contentBlocks[idx]
+          if (!block) break
+          if (delta.type === 'text_delta') {
+            block.text = (block.text || '') + delta.text
+          } else if (delta.type === 'input_json_delta') {
+            block.input = (block.input || '') + delta.partial_json
+          } else if (delta.type === 'thinking_delta') {
+            block.thinking = (block.thinking || '') + delta.thinking
+          } else if (delta.type === 'signature_delta') {
+            block.signature = delta.signature
+          }
+          break
+        }
+        case 'content_block_stop': {
+          const idx = (event as any).index
+          const block = contentBlocks[idx]
+          if (!block || !partialMessage) break
+          const m: AssistantMessage = {
+            message: {
+              ...partialMessage,
+              content: normalizeContentFromAPI([block], tools, options.agentId),
+            },
+            requestId: undefined,
+            type: 'assistant',
+            uuid: randomUUID(),
+            timestamp: new Date().toISOString(),
+          }
+          yield m
+          break
+        }
+        case 'message_delta': {
+          const deltaUsage = (event as any).usage
+          if (deltaUsage) usage = { ...usage, ...deltaUsage }
+          break
+        }
+        case 'message_stop':
+          break
+      }
+
+      if (
+        event.type === 'message_stop' &&
+        usage.input_tokens + usage.output_tokens > 0
+      ) {
+        const costUSD = calculateUSDCost(costrictModel, usage as any)
+        addToTotalSessionCost(costUSD, usage as any, options.model)
+      }
+
+      yield {
+        type: 'stream_event',
+        event,
+        ...(event.type === 'message_start' ? { ttftMs } : undefined),
+      } as StreamEvent
+    }
+  } catch (error) {
+    const errorMsg = error instanceof Error ? error.message : String(error)
+    logForDebugging(`[CoStrict] Error: ${errorMsg}`, { level: 'error' })
+    yield createAssistantAPIErrorMessage({
+      content: `CoStrict API Error: ${errorMsg}`,
+      apiError: 'api_error',
+      error: error instanceof Error ? error : new Error(String(error)),
+    })
+  }
+}
diff --git a/src/costrict/provider/modelMapping.ts b/src/costrict/provider/modelMapping.ts
new file mode 100644
index 000000000..73a415f3d
--- /dev/null
+++ b/src/costrict/provider/modelMapping.ts
@@ -0,0 +1,48 @@
+/**
+ * CoStrict 模型名称解析模块
+ * 将 Anthropic 模型名映射到 CoStrict 模型名
+ */
+
+import { getCachedCoStrictModels } from './models.js'
+
+function getModelFamily(model: string): 'haiku' | 'sonnet' | 'opus' | null {
+  if (/haiku/i.test(model)) return 'haiku'
+  if (/opus/i.test(model)) return 'opus'
+  if (/sonnet/i.test(model)) return 'sonnet'
+  return null
+}
+
+/**
+ * 解析 CoStrict 模型名
+ *
+ * 优先级:
+ * 1. 传入的 model 本身就是已知的 CoStrict 模型 ID（用户通过 /model 明确选择）
+ * 2. COSTRICT_MODEL 环境变量（管理员全局覆盖 / 登录默认值）
+ * 3. COSTRICT_DEFAULT_{FAMILY}_MODEL 环境变量（按模型族）
+ * 4. 已缓存的 CoStrict 模型列表中的第一个
+ * 5. 直接透传原始模型名（最后兜底）
+ */
+export function resolveCoStrictModel(anthropicModel: string): string {
+  const cleanModel = anthropicModel.replace(/\[1m\]$/, '')
+
+  // 优先级 1: 如果传入的 model 本身就是已知 CoStrict 模型 ID，直接使用
+  const cached = getCachedCoStrictModels()
+  if (cached.some(m => m.id === cleanModel)) return cleanModel
+
+  // 优先级 2: COSTRICT_MODEL 环境变量
+  if (process.env.COSTRICT_MODEL) return process.env.COSTRICT_MODEL
+
+  // 优先级 3: COSTRICT_DEFAULT_{FAMILY}_MODEL 环境变量
+  const family = getModelFamily(cleanModel)
+  if (family) {
+    const envVar = `COSTRICT_DEFAULT_${family.toUpperCase()}_MODEL`
+    const override = process.env[envVar]
+    if (override) return override
+  }
+
+  // 优先级 4: 缓存中的第一个模型
+  if (cached.length > 0) return cached[0].id
+
+  // 优先级 5: 透传原始模型名
+  return cleanModel
+}
diff --git a/src/costrict/provider/models.ts b/src/costrict/provider/models.ts
new file mode 100644
index 000000000..16743ba5d
--- /dev/null
+++ b/src/costrict/provider/models.ts
@@ -0,0 +1,83 @@
+/**
+ * CoStrict 动态模型列表模块
+ * 从 /ai-gateway/api/v1/models 获取可用模型，1小时缓存
+ */
+
+export interface CoStrictModel {
+  id: string
+  name?: string
+  object?: string
+  created?: number
+  owned_by?: string
+  supportsImages?: boolean
+  contextWindow?: number
+  maxTokens?: number
+  creditConsumption?: number
+  creditDiscount?: number
+  [key: string]: any
+}
+
+interface ModelCache {
+  models: CoStrictModel[]
+  timestamp: number
+}
+
+let modelCache: ModelCache | null = null
+const CACHE_TTL_MS = 60 * 60 * 1000 // 1 小时
+
+/**
+ * 获取 CoStrict 可用模型列表
+ */
+export async function fetchCoStrictModels(
+  baseUrl: string,
+  accessToken: string,
+): Promise<CoStrictModel[]> {
+  if (modelCache && Date.now() - modelCache.timestamp < CACHE_TTL_MS) {
+    return modelCache.models
+  }
+
+  try {
+    const response = await fetch(`${baseUrl}/ai-gateway/api/v1/models`, {
+      method: 'GET',
+      headers: {
+        Authorization: `Bearer ${accessToken}`,
+        Accept: 'application/json',
+      },
+    })
+
+    if (!response.ok) {
+      throw new Error(`Failed to fetch models: HTTP ${response.status}`)
+    }
+
+    const data = (await response.json()) as { data?: CoStrictModel[] }
+    const models = data.data || []
+
+    if (models.length === 0) return getDefaultModels()
+
+    modelCache = { models, timestamp: Date.now() }
+    return models
+  } catch {
+    // 有旧缓存则使用旧缓存
+    if (modelCache) return modelCache.models
+    return getDefaultModels()
+  }
+}
+
+function getDefaultModels(): CoStrictModel[] {
+  return [
+    { id: 'gpt-4', name: 'GPT-4' },
+    { id: 'gpt-3.5-turbo', name: 'GPT-3.5 Turbo' },
+  ]
+}
+
+export function clearModelCache(): void {
+  modelCache = null
+}
+
+/**
+ * 同步读取已缓存的模型列表（不发起网络请求）
+ * 供 modelOptions.ts 等同步上下文使用
+ */
+export function getCachedCoStrictModels(): CoStrictModel[] {
+  return modelCache?.models ?? []
+}
diff --git a/src/costrict/provider/oauth-params.ts b/src/costrict/provider/oauth-params.ts
new file mode 100644
index 000000000..6e84f5fef
--- /dev/null
+++ b/src/costrict/provider/oauth-params.ts
@@ -0,0 +1,58 @@
+/**
+ * CoStrict OAuth 参数构建模块
+ */
+
+import { createRequire } from 'module'
+
+// 优先使用构建时注入的 MACRO.VERSION，否则回退到 package.json（与 opencode Installation.VERSION 逻辑一致）
+function getVersion(): string {
+  try {
+    // MACRO.VERSION 由 Bun dev/build 构建时注入（scripts/defines.ts）
+    if (typeof MACRO !== 'undefined' && MACRO.VERSION) return MACRO.VERSION
+  } catch {
+    // 动态 import 时 MACRO 尚未定义，继续回退
+  }
+  try {
+    const require = createRequire(import.meta.url)
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    const pkg = require('../../../package.json') as { version: string }
+    return pkg.version
+  } catch {
+    return '1.0.0'
+  }
+}
+
+const COSTRICT_PLUGIN_VERSION = `costrict-cli-${getVersion()}`
+
+/**
+ * 构建标准的 OAuth 查询参数
+ *
+ * @param includeMachineCode 是否包含 machine_code (登录和轮询时需要，刷新时不需要)
+ * @param machineId 机器唯一标识
+ * @param state OAuth state (可选)
+ */
+export function buildOAuthParams(
+  includeMachineCode: boolean,
+  machineId?: string,
+  state?: string,
+): [string, string][] {
+  const params: [string, string][] = []
+
+  if (includeMachineCode) {
+    if (!machineId) throw new Error('machineId is required when includeMachineCode is true')
+    params.push(['machine_code', machineId])
+  }
+
+  if (state) {
+    params.push(['state', state])
+  }
+
+  params.push(
+    ['provider', 'casdoor'],
+    ['plugin_version', COSTRICT_PLUGIN_VERSION],
+    ['vscode_version', COSTRICT_PLUGIN_VERSION],
+    ['uri_scheme', 'costrict-cli'],
+  )
+
+  return params
+}
diff --git a/src/costrict/provider/token.ts b/src/costrict/provider/token.ts
new file mode 100644
index 000000000..03ea93224
--- /dev/null
+++ b/src/costrict/provider/token.ts
@@ -0,0 +1,119 @@
+/**
+ * CoStrict Token 管理模块
+ * 负责 Token 验证、刷新和 JWT 解析
+ */
+
+import type { CoStrictCredentials } from './credentials.js'
+import { buildOAuthParams } from './oauth-params.js'
+
+interface JWTPayload {
+  exp?: number
+  iat?: number
+  [key: string]: any
+}
+
+/**
+ * 解析 JWT Token (不验证签名)
+ */
+export function parseJWT(token: string): JWTPayload {
+  const parts = token.split('.')
+  if (parts.length !== 3) throw new Error('Invalid JWT format')
+  const decoded = Buffer.from(parts[1], 'base64url').toString('utf-8')
+  return JSON.parse(decoded) as JWTPayload
+}
+
+/**
+ * 从 JWT Token 提取过期时间 (毫秒)
+ */
+export function extractExpiryFromJWT(token: string): number {
+  try {
+    const payload = parseJWT(token)
+    return payload.exp ? payload.exp * 1000 : 0
+  } catch {
+    return 0
+  }
+}
+
+/**
+ * 三层 Token 验证策略
+ */
+export function isCoStrictTokenValid(credentials: CoStrictCredentials): boolean {
+  const now = Date.now()
+  const bufferMs = 30 * 60 * 1000 // 30 分钟
+
+  // 策略 1: expiry_date (30 分钟缓冲)
+  if (credentials.expiry_date) {
+    return now < credentials.expiry_date - bufferMs
+  }
+
+  // 策略 2: refresh_token JWT
+  if (credentials.refresh_token) {
+    try {
+      const payload = parseJWT(credentials.refresh_token)
+      if (payload.exp) return payload.exp * 1000 > now
+    } catch {
+      // fall through
+    }
+  }
+
+  // 策略 3: access_token JWT (30 分钟缓冲)
+  try {
+    const payload = parseJWT(credentials.access_token)
+    if (payload.exp) return now < payload.exp * 1000 - bufferMs
+  } catch {
+    // fall through
+  }
+
+  return false
+}
+
+export interface RefreshTokenParams {
+  baseUrl: string
+  refreshToken: string
+  state?: string
+}
+
+export interface RefreshTokenResponse {
+  access_token: string
+  refresh_token: string
+}
+
+/**
+ * 刷新 CoStrict Token
+ * ⚠️ 刷新时**排除** machine_code 参数
+ */
+export async function refreshCoStrictToken(
+  params: RefreshTokenParams,
+): Promise<RefreshTokenResponse> {
+  const queryParams = buildOAuthParams(false, undefined, params.state)
+  const queryString = queryParams
+    .map(([k, v]) => `${k}=${encodeURIComponent(v)}`)
+    .join('&')
+
+  const url = `${params.baseUrl}/oidc-auth/api/v1/plugin/login/token?${queryString}`
+
+  const response = await fetch(url, {
+    method: 'GET',
+    headers: {
+      Authorization: `Bearer ${params.refreshToken}`,
+      Accept: 'application/json',
+    },
+  })
+
+  if (!response.ok) {
+    const body = await response.text()
+    throw new Error(
+      response.status === 400 || response.status === 401
+        ? `Refresh token is invalid or expired (${response.status}): ${body}`
+        : `Token refresh failed with status ${response.status}: ${body}`,
+    )
+  }
+
+  const data = (await response.json()) as RefreshTokenResponse
+
+  if (!data.access_token || !data.refresh_token) {
+    throw new Error('Token refresh response is missing required fields')
+  }
+
+  return data
+}
diff --git a/src/services/api/claude.ts b/src/services/api/claude.ts
index e45565546..8faecb576 100644
--- a/src/services/api/claude.ts
+++ b/src/services/api/claude.ts
@@ -1356,6 +1356,12 @@ async function* queryModel(
     return
   }
 
+  if (getAPIProvider() === 'costrict') {
+    const { queryModelCoStrict } = await import('../../costrict/provider/index.js')
+    yield* queryModelCoStrict(messagesForAPI, systemPrompt, filteredTools, signal, options)
+    return
+  }
+
   // Instrumentation: Track message count after normalization
   logEvent('tengu_api_after_normalize', {
     postNormalizedMessageCount: messagesForAPI.length,
diff --git a/src/setup.ts b/src/setup.ts
index 985e8577a..331c5c1f6 100644
--- a/src/setup.ts
+++ b/src/setup.ts
@@ -46,6 +46,7 @@ import type { PermissionMode } from './utils/permissions/PermissionMode.js'
 import { getPlanSlug } from './utils/plans.js'
 import { saveWorktreeState } from './utils/sessionStorage.js'
 import { profileCheckpoint } from './utils/startupProfiler.js'
+import { getAPIProvider } from './utils/model/providers.js'
 import {
   createTmuxSessionForWorktree,
   createWorktreeForSession,
@@ -380,6 +381,68 @@ export async function setup(
   void prefetchApiKeyFromApiKeyHelperIfSafe(getIsNonInteractiveSession()) // Prefetch safely - only executes if trust already confirmed
   profileCheckpoint('setup_after_prefetch')
 
+  // CoStrict provider: 启动时恢复凭证并预取模型列表
+  if (getAPIProvider() === 'costrict') {
+    void (async () => {
+      try {
+        const { loadCoStrictCredentials, saveCoStrictCredentials } = await import('./costrict/provider/credentials.js')
+        const { isCoStrictTokenValid, refreshCoStrictToken, extractExpiryFromJWT } = await import('./costrict/provider/token.js')
+        const { fetchCoStrictModels } = await import('./costrict/provider/models.js')
+        const { getCoStrictBaseURL } = await import('./costrict/provider/auth.js')
+
+        const creds = await loadCoStrictCredentials()
+        if (!creds) {
+          // 没有凭证，清除 modelType 让下次启动回到登录界面
+          const { updateSettingsForSource } = await import('./utils/settings/settings.js')
+          updateSettingsForSource('userSettings', { modelType: undefined } as any)
+          return
+        }
+
+        // 验证 / 刷新 token（注意 refreshCoStrictToken 接收 RefreshTokenParams，字段名与 CoStrictCredentials 不同）
+        let activeCreds = creds
+        if (!isCoStrictTokenValid(creds)) {
+          if (creds.refresh_token) {
+            try {
+              const refreshed = await refreshCoStrictToken({
+                baseUrl: getCoStrictBaseURL(creds.base_url),
+                refreshToken: creds.refresh_token,
+                state: creds.state,
+              })
+              activeCreds = {
+                ...creds,
+                access_token: refreshed.access_token,
+                refresh_token: refreshed.refresh_token,
+                expiry_date: extractExpiryFromJWT(refreshed.access_token),
+                updated_at: new Date().toISOString(),
+              }
+              await saveCoStrictCredentials(activeCreds)
+            } catch {
+              // 刷新失败，清除 modelType 提示重新登录
+              const { updateSettingsForSource } = await import('./utils/settings/settings.js')
+              updateSettingsForSource('userSettings', { modelType: undefined } as any)
+              return
+            }
+          } else {
+            // 无 refresh_token，清除 modelType
+            const { updateSettingsForSource } = await import('./utils/settings/settings.js')
+            updateSettingsForSource('userSettings', { modelType: undefined } as any)
+            return
+          }
+        }
+
+        // 预取模型列表，填充同步缓存
+        const baseUrl = getCoStrictBaseURL(activeCreds.base_url)
+        const models = await fetchCoStrictModels(baseUrl, activeCreds.access_token)
+        if (models.length > 0 && !process.env.COSTRICT_MODEL) {
+          process.env.COSTRICT_MODEL = models[0].id
+        }
+        process.env.CLAUDE_CODE_USE_COSTRICT = '1'
+      } catch {
+        // 初始化失败不阻断启动
+      }
+    })()
+  }
+
   // Pre-fetch data for Logo v2 - await to ensure it's ready before logo renders.
   // --bare / SIMPLE: skip — release notes are interactive-UI display data,
   // and getRecentActivity() reads up to 10 session JSONL files.
diff --git a/src/utils/model/modelOptions.ts b/src/utils/model/modelOptions.ts
index 6d84a187f..c84c59272 100644
--- a/src/utils/model/modelOptions.ts
+++ b/src/utils/model/modelOptions.ts
@@ -378,6 +378,36 @@ function getModelOptionsBase(fastMode = false): ModelOption[] {
     return standardOptions
   }
 
+  // CoStrict provider: 从缓存中动态展示 CoStrict 可用模型
+  if (getAPIProvider() === 'costrict') {
+    // 延迟 require 避免循环依赖，且该模块只在 costrict provider 下加载
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    const { getCachedCoStrictModels } = require('../../costrict/provider/models.js') as typeof import('../../costrict/provider/models.js')
+    const cachedModels = getCachedCoStrictModels()
+    if (cachedModels.length > 0) {
+      const sorted = [...cachedModels].sort((a, b) => a.id.localeCompare(b.id))
+      return sorted.map(m => {
+        const description =
+          m.id === 'Auto'
+            ? `${Math.round((m.creditDiscount ?? 0) * 100)}% discount`
+            : `${m.creditConsumption ?? '?'}x credit`
+        return {
+          value: m.id,
+          label: m.id,
+          description,
+        }
+      })
+    }
+    // 缓存尚未加载（凭证过期或首次加载中），提示用户重新登录
+    return [
+      {
+        value: null,
+        label: 'CoStrict (not logged in)',
+        description: 'Run /login to sign in with CoStrict again',
+      },
+    ]
+  }
+
   // PAYG 1P API: Default (Sonnet) + Sonnet 1M + Opus 4.6 + Opus 1M + Haiku
   if (getAPIProvider() === 'firstParty') {
     const payg1POptions = [getDefaultOptionForUser(fastMode)]
diff --git a/src/utils/model/providers.ts b/src/utils/model/providers.ts
index 823384f2d..b5b55444c 100644
--- a/src/utils/model/providers.ts
+++ b/src/utils/model/providers.ts
@@ -10,12 +10,14 @@ export type APIProvider =
   | 'openai'
   | 'gemini'
   | 'grok'
+  | 'costrict'
 
 export function getAPIProvider(): APIProvider {
   const modelType = getInitialSettings().modelType
   if (modelType === 'openai') return 'openai'
   if (modelType === 'gemini') return 'gemini'
   if (modelType === 'grok') return 'grok'
+  if (modelType === 'costrict') return 'costrict'
 
   if (isEnvTruthy(process.env.CLAUDE_CODE_USE_BEDROCK)) return 'bedrock'
   if (isEnvTruthy(process.env.CLAUDE_CODE_USE_VERTEX)) return 'vertex'
@@ -24,6 +26,7 @@ export function getAPIProvider(): APIProvider {
   if (isEnvTruthy(process.env.CLAUDE_CODE_USE_OPENAI)) return 'openai'
   if (isEnvTruthy(process.env.CLAUDE_CODE_USE_GEMINI)) return 'gemini'
   if (isEnvTruthy(process.env.CLAUDE_CODE_USE_GROK)) return 'grok'
+  if (isEnvTruthy(process.env.CLAUDE_CODE_USE_COSTRICT)) return 'costrict'
 
   return 'firstParty'
 }
diff --git a/src/utils/settings/types.ts b/src/utils/settings/types.ts
index edeecb190..d6304f6c7 100644
--- a/src/utils/settings/types.ts
+++ b/src/utils/settings/types.ts
@@ -373,10 +373,10 @@ export const SettingsSchema = lazySchema(() =>
         .optional()
         .describe('Tool usage permissions configuration'),
       modelType: z
-        .enum(['anthropic', 'openai', 'gemini', 'grok'])
+        .enum(['anthropic', 'openai', 'gemini', 'grok', 'costrict'])
         .optional()
         .describe(
-          'API provider type. "anthropic" uses the Anthropic API (default), "openai" uses the OpenAI Chat Completions API, "gemini" uses the Gemini API, and "grok" uses the xAI Grok API (OpenAI-compatible). ' +
+          'API provider type. "anthropic" uses the Anthropic API (default), "openai" uses the OpenAI Chat Completions API, "gemini" uses the Gemini API, "grok" uses the xAI Grok API (OpenAI-compatible), and "costrict" uses the CoStrict API. ' +
             'When set to "openai", configure OPENAI_API_KEY, OPENAI_BASE_URL, and OPENAI_MODEL. When set to "gemini", configure GEMINI_API_KEY and optional GEMINI_BASE_URL. When set to "grok", configure GROK_API_KEY (or XAI_API_KEY), optional GROK_BASE_URL, GROK_MODEL, and GROK_MODEL_MAP.',
         ),
       model: z