fix: route codex remote https through local proxy chain

src/cliproxy/codex-reasoning-proxy.ts

@@ -24,6 +24,8 @@ export interface CodexReasoningProxyConfig {
   modelMap: CodexReasoningModelMap;
   defaultEffort?: CodexReasoningEffort;
   traceFilePath?: string;
+  /** Skip TLS certificate validation for self-signed remote HTTPS proxies */
+  allowSelfSigned?: boolean;
   /**
    * Path prefix to strip from incoming requests before forwarding to upstream.
    * Used for remote proxy mode where upstream expects /v1/messages, not /api/provider/codex/v1/messages.
@@ -179,6 +181,7 @@ export class CodexReasoningProxy {
       | 'defaultEffort'
       | 'traceFilePath'
       | 'disableEffort'
+      | 'allowSelfSigned'
     >
   > &
     Pick<CodexReasoningProxyConfig, 'modelMap' | 'stripPathPrefix'>;
@@ -203,6 +206,7 @@ export class CodexReasoningProxy {
       traceFilePath: config.traceFilePath ?? '',
       stripPathPrefix: config.stripPathPrefix,
       disableEffort: config.disableEffort ?? false,
+      allowSelfSigned: config.allowSelfSigned ?? false,
     };
     this.modelEffort = buildCodexModelEffortMap(this.config.modelMap, this.config.defaultEffort);
   }
@@ -508,6 +512,38 @@ export class CodexReasoningProxy {
     return url.protocol === 'https:' ? https.request : http.request;
   }
 
+  private startResponseTimeout(upstreamReq: http.ClientRequest): () => void {
+    const deadline = setTimeout(() => {
+      upstreamReq.destroy(new Error('Upstream request timeout'));
+    }, this.config.timeoutMs);
+    upstreamReq.setTimeout(this.config.timeoutMs, () => {
+      upstreamReq.destroy(new Error('Upstream request timeout'));
+    });
+    return () => clearTimeout(deadline);
+  }
+
+  private buildRequestOptions(
+    upstreamUrl: URL,
+    method: string | undefined,
+    headers: http.OutgoingHttpHeaders
+  ): https.RequestOptions {
+    const options: https.RequestOptions = {
+      protocol: upstreamUrl.protocol,
+      hostname: upstreamUrl.hostname,
+      port: upstreamUrl.port,
+      path: upstreamUrl.pathname + upstreamUrl.search,
+      method,
+      timeout: this.config.timeoutMs,
+      headers,
+    };
+
+    if (upstreamUrl.protocol === 'https:' && this.config.allowSelfSigned) {
+      options.rejectUnauthorized = false;
+    }
+
+    return options;
+  }
+
   private forwardRaw(
     originalReq: http.IncomingMessage,
     clientRes: http.ServerResponse,
@@ -515,17 +551,15 @@ export class CodexReasoningProxy {
   ): Promise<void> {
     return new Promise((resolve, reject) => {
       const requestFn = this.getRequestFn(upstreamUrl);
+      let clearResponseTimeout: () => void = () => undefined;
       const upstreamReq = requestFn(
-        {
+        this.buildRequestOptions(
-          protocol: upstreamUrl.protocol,
+          upstreamUrl,
-          hostname: upstreamUrl.hostname,
+          originalReq.method,
-          port: upstreamUrl.port,
+          this.buildForwardHeaders(originalReq.headers)
-          path: upstreamUrl.pathname + upstreamUrl.search,
+        ),
-          method: originalReq.method,
-          timeout: this.config.timeoutMs,
-          headers: this.buildForwardHeaders(originalReq.headers),
-        },
         (upstreamRes) => {
+          clearResponseTimeout();
           clientRes.writeHead(upstreamRes.statusCode || 200, upstreamRes.headers);
           upstreamRes.pipe(clientRes);
           upstreamRes.on('end', () => resolve());
@@ -533,8 +567,12 @@ export class CodexReasoningProxy {
         }
       );
 
+      clearResponseTimeout = this.startResponseTimeout(upstreamReq);
       upstreamReq.on('timeout', () => upstreamReq.destroy(new Error('Upstream request timeout')));
-      upstreamReq.on('error', reject);
+      upstreamReq.on('error', (err) => {
+        clearResponseTimeout();
+        reject(err);
+      });
       originalReq.pipe(upstreamReq);
     });
   }
@@ -549,17 +587,15 @@ export class CodexReasoningProxy {
     return new Promise((resolve, reject) => {
       const bodyString = JSON.stringify(body);
       const requestFn = this.getRequestFn(upstreamUrl);
+      let clearResponseTimeout: () => void = () => undefined;
       const upstreamReq = requestFn(
-        {
+        this.buildRequestOptions(
-          protocol: upstreamUrl.protocol,
+          upstreamUrl,
-          hostname: upstreamUrl.hostname,
+          originalReq.method,
-          port: upstreamUrl.port,
+          this.buildForwardHeaders(originalReq.headers, bodyString)
-          path: upstreamUrl.pathname + upstreamUrl.search,
+        ),
-          method: originalReq.method,
-          timeout: this.config.timeoutMs,
-          headers: this.buildForwardHeaders(originalReq.headers, bodyString),
-        },
         (upstreamRes) => {
+          clearResponseTimeout();
           const statusCode = upstreamRes.statusCode || 200;
           if (statusCode >= 200 && statusCode < 300) {
             clientRes.writeHead(statusCode, upstreamRes.headers);
@@ -631,8 +667,12 @@ export class CodexReasoningProxy {
         }
       );
 
+      clearResponseTimeout = this.startResponseTimeout(upstreamReq);
       upstreamReq.on('timeout', () => upstreamReq.destroy(new Error('Upstream request timeout')));
-      upstreamReq.on('error', reject);
+      upstreamReq.on('error', (err) => {
+        clearResponseTimeout();
+        reject(err);
+      });
       upstreamReq.write(bodyString);
       upstreamReq.end();
     });

src/cliproxy/executor/https-tunnel-policy.ts

@@ -0,0 +1,33 @@
+import type { CLIProxyProvider } from '../types';
+
+interface HttpsTunnelPolicyInput {
+  provider: CLIProxyProvider;
+  useRemoteProxy: boolean;
+  protocol?: 'http' | 'https';
+  host?: string;
+  isComposite?: boolean;
+}
+
+/**
+ * Claude only needs the HTTPS tunnel when it would otherwise talk directly to a
+ * remote HTTPS CLIProxy. Single-provider Codex launches already route Claude
+ * through local HTTP proxy layers, so those layers can connect upstream via
+ * HTTPS without adding another local tunnel.
+ */
+export function shouldStartHttpsTunnel({
+  provider,
+  useRemoteProxy,
+  protocol,
+  host,
+  isComposite,
+}: HttpsTunnelPolicyInput): boolean {
+  if (!useRemoteProxy || protocol !== 'https' || !host) {
+    return false;
+  }
+
+  if (provider === 'codex' && !isComposite) {
+    return false;
+  }
+
+  return true;
+}

src/cliproxy/executor/index.ts

@@ -126,6 +126,7 @@ import {
   resolveRuntimeThinkingOverride,
   shouldDisableCodexReasoning,
 } from './thinking-override-resolver';
+import { shouldStartHttpsTunnel } from './https-tunnel-policy';
 
 /** Default executor configuration */
 const DEFAULT_CONFIG: ExecutorConfig = {
@@ -1017,7 +1018,15 @@ export async function execClaudeWithCLIProxy(
   let httpsTunnel: HttpsTunnelProxy | null = null;
   let tunnelPort: number | null = null;
 
-  if (useRemoteProxy && proxyConfig.protocol === 'https' && proxyConfig.host) {
+  const useHttpsTunnel = shouldStartHttpsTunnel({
+    provider,
+    useRemoteProxy,
+    protocol: proxyConfig.protocol,
+    host: proxyConfig.host,
+    isComposite: cfg.isComposite,
+  });
+
+  if (useHttpsTunnel && proxyConfig.host) {
     try {
       httpsTunnel = new HttpsTunnelProxy({
         remoteHost: proxyConfig.host,
@@ -1028,13 +1037,15 @@ export async function execClaudeWithCLIProxy(
       });
       tunnelPort = await httpsTunnel.start();
       log(
-        `HTTPS tunnel started on port ${tunnelPort} → https://${proxyConfig.host}:${proxyConfig.port}`
+        `HTTPS tunnel started on port ${tunnelPort} -> https://${proxyConfig.host}:${proxyConfig.port}`
       );
     } catch (error) {
       const err = error as Error;
       console.error(warn(`Failed to start HTTPS tunnel: ${err.message}`));
       throw new Error(`HTTPS tunnel startup failed: ${err.message}`);
     }
+  } else if (useRemoteProxy && proxyConfig.protocol === 'https' && provider === 'codex') {
+    log('HTTPS tunnel skipped for Codex; local proxy chain will connect to remote HTTPS directly');
   }
 
   const imageAnalysisProxyTarget =
@@ -1135,6 +1146,7 @@ export async function execClaudeWithCLIProxy(
         upstreamBaseUrl: initialEnvVars.ANTHROPIC_BASE_URL,
         verbose,
         warnOnSanitize: true,
+        allowSelfSigned: useRemoteProxy ? (proxyConfig.allowSelfSigned ?? false) : false,
       });
       toolSanitizationPort = await toolSanitizationProxy.start();
       log(`Tool sanitization proxy active on port ${toolSanitizationPort}`);
@@ -1173,6 +1185,7 @@ export async function execClaudeWithCLIProxy(
           defaultEffort: 'medium',
           disableEffort: codexThinkingOff,
           traceFilePath: traceEnabled ? path.join(getCcsDir(), 'codex-reasoning-proxy.log') : '',
+          allowSelfSigned: useRemoteProxy ? (proxyConfig.allowSelfSigned ?? false) : false,
           modelMap: {
             defaultModel: initialEnvVars.ANTHROPIC_MODEL,
             opusModel: initialEnvVars.ANTHROPIC_DEFAULT_OPUS_MODEL,

src/cliproxy/tool-sanitization-proxy.ts

@@ -37,6 +37,8 @@ export interface ToolSanitizationProxyConfig {
   warnOnSanitize?: boolean;
   /** Request timeout in milliseconds */
   timeoutMs?: number;
+  /** Skip TLS certificate validation for self-signed remote HTTPS proxies */
+  allowSelfSigned?: boolean;
 }
 
 /**
@@ -162,6 +164,7 @@ export class ToolSanitizationProxy {
       verbose: config.verbose ?? false,
       warnOnSanitize: config.warnOnSanitize ?? true,
       timeoutMs: config.timeoutMs ?? 120000,
+      allowSelfSigned: config.allowSelfSigned ?? false,
     };
     this.debugMode = process.env.CCS_DEBUG === '1';
     this.logFilePath = this.initLogFile();
@@ -469,6 +472,38 @@ export class ToolSanitizationProxy {
     return url.protocol === 'https:' ? https.request : http.request;
   }
 
+  private startResponseTimeout(upstreamReq: http.ClientRequest): () => void {
+    const deadline = setTimeout(() => {
+      upstreamReq.destroy(new Error('Upstream request timeout'));
+    }, this.config.timeoutMs);
+    upstreamReq.setTimeout(this.config.timeoutMs, () => {
+      upstreamReq.destroy(new Error('Upstream request timeout'));
+    });
+    return () => clearTimeout(deadline);
+  }
+
+  private buildRequestOptions(
+    upstreamUrl: URL,
+    method: string | undefined,
+    headers: http.OutgoingHttpHeaders
+  ): https.RequestOptions {
+    const options: https.RequestOptions = {
+      protocol: upstreamUrl.protocol,
+      hostname: upstreamUrl.hostname,
+      port: upstreamUrl.port,
+      path: upstreamUrl.pathname + upstreamUrl.search,
+      method,
+      timeout: this.config.timeoutMs,
+      headers,
+    };
+
+    if (upstreamUrl.protocol === 'https:' && this.config.allowSelfSigned) {
+      options.rejectUnauthorized = false;
+    }
+
+    return options;
+  }
+
   private forwardRaw(
     originalReq: http.IncomingMessage,
     clientRes: http.ServerResponse,
@@ -476,16 +511,15 @@ export class ToolSanitizationProxy {
   ): Promise<void> {
     return new Promise((resolve, reject) => {
       const requestFn = this.getRequestFn(upstreamUrl);
+      let clearResponseTimeout: () => void = () => undefined;
       const upstreamReq = requestFn(
-        {
+        this.buildRequestOptions(
-          protocol: upstreamUrl.protocol,
+          upstreamUrl,
-          hostname: upstreamUrl.hostname,
+          originalReq.method,
-          port: upstreamUrl.port,
+          this.buildForwardHeaders(originalReq.headers)
-          path: upstreamUrl.pathname + upstreamUrl.search,
+        ),
-          method: originalReq.method,
-          headers: this.buildForwardHeaders(originalReq.headers),
-        },
         (upstreamRes) => {
+          clearResponseTimeout();
           clientRes.writeHead(upstreamRes.statusCode || 200, upstreamRes.headers);
           upstreamRes.pipe(clientRes);
           upstreamRes.on('end', () => resolve());
@@ -493,8 +527,12 @@ export class ToolSanitizationProxy {
         }
       );
 
+      clearResponseTimeout = this.startResponseTimeout(upstreamReq);
       upstreamReq.on('timeout', () => upstreamReq.destroy(new Error('Upstream request timeout')));
-      upstreamReq.on('error', reject);
+      upstreamReq.on('error', (err) => {
+        clearResponseTimeout();
+        reject(err);
+      });
       originalReq.pipe(upstreamReq);
     });
   }
@@ -512,16 +550,15 @@ export class ToolSanitizationProxy {
     return new Promise((resolve, reject) => {
       const bodyString = JSON.stringify(body);
       const requestFn = this.getRequestFn(upstreamUrl);
+      let clearResponseTimeout: () => void = () => undefined;
       const upstreamReq = requestFn(
-        {
+        this.buildRequestOptions(
-          protocol: upstreamUrl.protocol,
+          upstreamUrl,
-          hostname: upstreamUrl.hostname,
+          originalReq.method,
-          port: upstreamUrl.port,
+          this.buildForwardHeaders(originalReq.headers, bodyString)
-          path: upstreamUrl.pathname + upstreamUrl.search,
+        ),
-          method: originalReq.method,
-          headers: this.buildForwardHeaders(originalReq.headers, bodyString),
-        },
         (upstreamRes) => {
+          clearResponseTimeout();
           const chunks: Buffer[] = [];
 
           upstreamRes.on('data', (chunk: Buffer) => chunks.push(chunk));
@@ -564,8 +601,12 @@ export class ToolSanitizationProxy {
         }
       );
 
+      clearResponseTimeout = this.startResponseTimeout(upstreamReq);
       upstreamReq.on('timeout', () => upstreamReq.destroy(new Error('Upstream request timeout')));
-      upstreamReq.on('error', reject);
+      upstreamReq.on('error', (err) => {
+        clearResponseTimeout();
+        reject(err);
+      });
       upstreamReq.write(bodyString);
       upstreamReq.end();
     });
@@ -585,16 +626,15 @@ export class ToolSanitizationProxy {
     return new Promise((resolve, reject) => {
       const bodyString = JSON.stringify(body);
       const requestFn = this.getRequestFn(upstreamUrl);
+      let clearResponseTimeout: () => void = () => undefined;
       const upstreamReq = requestFn(
-        {
+        this.buildRequestOptions(
-          protocol: upstreamUrl.protocol,
+          upstreamUrl,
-          hostname: upstreamUrl.hostname,
+          originalReq.method,
-          port: upstreamUrl.port,
+          this.buildForwardHeaders(originalReq.headers, bodyString)
-          path: upstreamUrl.pathname + upstreamUrl.search,
+        ),
-          method: originalReq.method,
-          headers: this.buildForwardHeaders(originalReq.headers, bodyString),
-        },
         (upstreamRes) => {
+          clearResponseTimeout();
           clientRes.writeHead(upstreamRes.statusCode || 200, upstreamRes.headers);
 
           // Track upstream SSE lifecycle events (guards against empty proxy responses)
@@ -712,8 +752,12 @@ export class ToolSanitizationProxy {
         }
       );
 
+      clearResponseTimeout = this.startResponseTimeout(upstreamReq);
       upstreamReq.on('timeout', () => upstreamReq.destroy(new Error('Upstream request timeout')));
-      upstreamReq.on('error', reject);
+      upstreamReq.on('error', (err) => {
+        clearResponseTimeout();
+        reject(err);
+      });
       upstreamReq.write(bodyString);
       upstreamReq.end();
     });

tests/unit/cliproxy/https-tunnel-policy.test.ts

@@ -0,0 +1,57 @@
+import { describe, expect, it } from 'bun:test';
+import { shouldStartHttpsTunnel } from '../../../src/cliproxy/executor/https-tunnel-policy';
+
+describe('HTTPS tunnel startup policy', () => {
+  it('skips the tunnel for single-provider Codex remote HTTPS launches', () => {
+    expect(
+      shouldStartHttpsTunnel({
+        provider: 'codex',
+        useRemoteProxy: true,
+        protocol: 'https',
+        host: 'remote.example.test',
+      })
+    ).toBe(false);
+  });
+
+  it('keeps the tunnel for non-Codex remote HTTPS launches', () => {
+    expect(
+      shouldStartHttpsTunnel({
+        provider: 'gemini',
+        useRemoteProxy: true,
+        protocol: 'https',
+        host: 'remote.example.test',
+      })
+    ).toBe(true);
+  });
+
+  it('keeps the tunnel for composite HTTPS launches', () => {
+    expect(
+      shouldStartHttpsTunnel({
+        provider: 'codex',
+        useRemoteProxy: true,
+        protocol: 'https',
+        host: 'remote.example.test',
+        isComposite: true,
+      })
+    ).toBe(true);
+  });
+
+  it('does not start a tunnel without a remote HTTPS target', () => {
+    expect(
+      shouldStartHttpsTunnel({
+        provider: 'codex',
+        useRemoteProxy: true,
+        protocol: 'http',
+        host: 'remote.example.test',
+      })
+    ).toBe(false);
+    expect(
+      shouldStartHttpsTunnel({
+        provider: 'codex',
+        useRemoteProxy: false,
+        protocol: 'https',
+        host: 'remote.example.test',
+      })
+    ).toBe(false);
+  });
+});

tests/unit/cliproxy/remote-proxy-chain-regression.test.ts

@@ -0,0 +1,180 @@
+import { describe, expect, it } from 'bun:test';
+import * as http from 'http';
+import * as https from 'https';
+import type { AddressInfo } from 'net';
+import { CodexReasoningProxy } from '../../../src/cliproxy/codex-reasoning-proxy';
+import { ToolSanitizationProxy } from '../../../src/cliproxy/tool-sanitization-proxy';
+
+const SELF_SIGNED_KEY = `-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----`;
+
+const SELF_SIGNED_CERT = `-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----`;
+
+function listen(server: http.Server | https.Server): Promise<number> {
+  return new Promise((resolve) => {
+    server.listen(0, '127.0.0.1', () => {
+      resolve((server.address() as AddressInfo).port);
+    });
+  });
+}
+
+function close(server: http.Server | https.Server): Promise<void> {
+  return new Promise((resolve) => {
+    const fallback = setTimeout(resolve, 100);
+    server.close(() => {
+      clearTimeout(fallback);
+      resolve();
+    });
+    server.closeAllConnections?.();
+    server.closeIdleConnections?.();
+  });
+}
+
+describe('remote proxy chain regression', () => {
+  it('lets the local Codex reasoning proxy connect directly to self-signed HTTPS upstreams', async () => {
+    let forwardedPath = '';
+    let forwardedReasoningEffort: unknown;
+    const upstream = https.createServer(
+      { key: SELF_SIGNED_KEY, cert: SELF_SIGNED_CERT },
+      (req, res) => {
+        forwardedPath = req.url || '';
+        const chunks: Buffer[] = [];
+        req.on('data', (chunk: Buffer) => chunks.push(chunk));
+        req.on('end', () => {
+          const parsed = JSON.parse(Buffer.concat(chunks).toString('utf8'));
+          forwardedReasoningEffort = parsed.reasoning?.effort;
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({ content: [{ type: 'text', text: 'ok' }] }));
+        });
+      }
+    );
+    const upstreamPort = await listen(upstream);
+    const proxy = new CodexReasoningProxy({
+      upstreamBaseUrl: `https://localhost:${upstreamPort}`,
+      allowSelfSigned: true,
+      stripPathPrefix: '/api/provider/codex',
+      defaultEffort: 'medium',
+      modelMap: {
+        defaultModel: 'gpt-5.4',
+      },
+    });
+
+    try {
+      const proxyPort = await proxy.start();
+      const response = await fetch(`http://127.0.0.1:${proxyPort}/api/provider/codex/v1/messages`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ model: 'gpt-5.4', messages: [] }),
+      });
+
+      expect(response.status).toBe(200);
+      expect(await response.json()).toEqual({ content: [{ type: 'text', text: 'ok' }] });
+      expect(forwardedPath).toBe('/v1/messages');
+      expect(forwardedReasoningEffort).toBe('xhigh');
+    } finally {
+      proxy.stop();
+      await close(upstream);
+    }
+  });
+
+  it('routes Codex through tool sanitization to a self-signed remote HTTPS proxy', async () => {
+    let forwardedPath = '';
+    let forwardedReasoningEffort: unknown;
+    const upstream = https.createServer(
+      { key: SELF_SIGNED_KEY, cert: SELF_SIGNED_CERT },
+      (req, res) => {
+        forwardedPath = req.url || '';
+        const chunks: Buffer[] = [];
+        req.on('data', (chunk: Buffer) => chunks.push(chunk));
+        req.on('end', () => {
+          const parsed = JSON.parse(Buffer.concat(chunks).toString('utf8'));
+          forwardedReasoningEffort = parsed.reasoning?.effort;
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({ content: [{ type: 'text', text: 'ok' }] }));
+        });
+      }
+    );
+    const upstreamPort = await listen(upstream);
+    const toolProxy = new ToolSanitizationProxy({
+      upstreamBaseUrl: `https://localhost:${upstreamPort}`,
+      allowSelfSigned: true,
+      warnOnSanitize: false,
+    });
+    let codexProxy: CodexReasoningProxy | null = null;
+
+    try {
+      const toolPort = await toolProxy.start();
+      codexProxy = new CodexReasoningProxy({
+        upstreamBaseUrl: `http://127.0.0.1:${toolPort}`,
+        stripPathPrefix: '/api/provider/codex',
+        defaultEffort: 'medium',
+        modelMap: {
+          defaultModel: 'gpt-5.4',
+        },
+      });
+      const codexPort = await codexProxy.start();
+      const response = await fetch(`http://127.0.0.1:${codexPort}/api/provider/codex/v1/messages`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          model: 'gpt-5.4',
+          messages: [],
+          tools: [{ name: 'read', input_schema: {}, cache_control: { type: 'ephemeral' } }],
+        }),
+      });
+
+      expect(response.status).toBe(200);
+      expect(await response.json()).toEqual({ content: [{ type: 'text', text: 'ok' }] });
+      expect(forwardedPath).toBe('/v1/messages');
+      expect(forwardedReasoningEffort).toBe('xhigh');
+    } finally {
+      codexProxy?.stop();
+      toolProxy.stop();
+      await close(upstream);
+    }
+  });
+});