fix(firewall): add api-proxy to allowed domains when enabled

[Claude]

The agent container was unable to communicate with the api-proxy sidecar because the api-proxy hostname was not in Squid's allowed domains list, causing all HTTP requests to http://api-proxy:10000 and http://api-proxy:10001 to be blocked.

Changes

• Domain whitelisting: Automatically include api-proxy in Squid's allowed domains when enableApiProxy is true
• Tests: Added coverage for api-proxy domain inclusion/exclusion based on configuration

Implementation

// src/docker-manager.ts
const domainsForSquid = config.enableApiProxy && networkConfig.proxyIp
  ? [...config.allowedDomains, 'api-proxy']
  : config.allowedDomains;

const squidConfig = generateSquidConfig({
  domains: domainsForSquid,
  // ...
});

The fix ensures agent-to-proxy communication works when API proxy sidecar is deployed with OpenAI or Anthropic API keys.

[Copilot]

Pull request overview

Fixes Squid domain allowlisting so the agent can reach the api-proxy sidecar hostname when API proxying is enabled, preventing Squid from blocking requests to http://api-proxy:10000 / :10001.

Changes:

• Add api-proxy to the Squid allowed domains list when enableApiProxy is enabled.
• Add unit tests intended to verify inclusion/exclusion of api-proxy in the generated squid.conf.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/docker-manager.ts	Extends the allowed domain list passed to generateSquidConfig to include api-proxy when API proxying is enabled.
src/docker-manager.test.ts	Adds tests to validate that api-proxy is present/absent in squid.conf depending on enableApiProxy.

Comments suppressed due to low confidence (1)

src/docker-manager.test.ts:1906

• Same issue as the prior test: errors from writeConfigs are ignored and the assertion is conditional on squid.conf existing, so the test may pass even when the config wasn’t generated. Prefer asserting the file was written (or mocking prerequisites) and then checking that api-proxy is absent when enableApiProxy is false.

      try {
        await writeConfigs(config);
      } catch {
        // May fail after writing configs
      }

      // Verify squid.conf does not include api-proxy when disabled
      const squidConfPath = path.join(testDir, 'squid.conf');
      if (fs.existsSync(squidConfPath)) {
        const content = fs.readFileSync(squidConfPath, 'utf-8');
        expect(content).toContain('github.com');
        expect(content).not.toContain('api-proxy');
      }

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[Copilot]

domainsForSquid appends 'api-proxy' unconditionally when enabled, which can create duplicate entries if the user already included api-proxy (or .api-proxy) in allowedDomains. Consider de-duping (e.g., via a Set or an includes check) before passing the list into generateSquidConfig to avoid redundant ACL lines.

Suggested change

	// When API proxy is enabled, add api-proxy to allowed domains so agent can communicate with it
	const domainsForSquid = config.enableApiProxy && networkConfig.proxyIp
	? [...config.allowedDomains, 'api-proxy']
	// Note: Use container path for SSL database since it's mounted at /var/spool/squid_ssl_db
	// When API proxy is enabled, add api-proxy to allowed domains so agent can communicate with it,
	// but avoid duplicating entries if the user already specified api-proxy (or .api-proxy).
	const hasApiProxyDomain =
	config.allowedDomains.includes('api-proxy') ||
	config.allowedDomains.includes('.api-proxy');
	const domainsForSquid = config.enableApiProxy && networkConfig.proxyIp
	? (hasApiProxyDomain ? config.allowedDomains : [...config.allowedDomains, 'api-proxy'])

[Copilot]

This test can pass without actually asserting anything: it swallows writeConfigs errors and then only checks the file contents if squid.conf exists. If writeConfigs fails before writing the config (e.g., missing seccomp profile), the if (fs.existsSync(...)) block is skipped and the test still passes. To make the coverage meaningful, ensure squid.conf is created (or mock the seccomp-profile copy) and assert existsSync is true, or spy on generateSquidConfig to verify the domains argument includes api-proxy.

This issue also appears on line 1894 of the same file.