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v0.7.2 — Route via process.env (real fix for stale ANTHROPIC_BASE_URL)

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@X-15 X-15 released this 25 Apr 13:05
v0.7.2
48415f9

Real fix for the stale-ANTHROPIC_BASE_URL bug

v0.7.1's attempt to clean up claudeCode.environmentVariables in deactivate() didn't work — VS Code unloads the extension before the async settings write commits, and the entry stayed in settings.json. v0.7.2 stops writing to settings.json entirely.

The new approach: process.env

All VS Code extensions in a window share a single Node.js extension host process — and therefore one process.env. Claude Code's spawn explicitly merges process.env with the user setting when launching claude (verified in anthropic.claude-code 2.1.120):

function OV(V) {
  let K = _14(e6("environmentVariables")),
      B = { ...process.env };               // ← inherits parent env
  if (V) B.PATH = V;
  B.MCP_CONNECTION_NONBLOCKING = "true";
  for (let x of K) if (x.name) B[x.name] = x.value || "";
  return B.CLAUDE_CODE_ENTRYPOINT = "claude-vscode", B;
}

So we just set process.env.ANTHROPIC_BASE_URL = 'http://127.0.0.1:9801' in our activate(). Claude Code's subprocess inherits it. Nothing persists to disk.

Why this is reliable

process.env is in-memory state of the extension host. Modification is synchronous. deactivate() does a synchronous delete process.env.ANTHROPIC_BASE_URL (or restores the prior value if there was one) before VS Code unloads us. No async race with the settings service. No stale settings.json entry possible.

When VS Code restarts with our extension uninstalled: extension host starts fresh, nothing for Claude Code to inherit, traffic goes direct to api.anthropic.com. Clean.

Automatic migration

If you have a stale ANTHROPIC_BASE_URL entry left behind by 0.6.x / 0.7.0 / 0.7.1: install v0.7.2 and the entry is removed automatically on activate (cleanupLegacyEnvSetting). Conservative — only removes entries whose value contains 127.0.0.1. User-set values (corp proxy, AWS Bedrock router) are left alone.

Preserves your existing ANTHROPIC_BASE_URL

If you have ANTHROPIC_BASE_URL set to a non-proxy URL in your shell (or another tool sets it), we save the prior value before overriding and restore it on deactivate. Enable Proxy Mode prompts before replacing an explicit non-proxy value.

Install

code --install-extension claude-code-cache-fix-0.7.2.vsix

If you were stuck with the 0.7.1 bug, just install v0.7.2 — no manual cleanup needed.

Verify

After install, open user settings.json. The ANTHROPIC_BASE_URL entry should be gone from claudeCode.environmentVariables. The proxy should still be live (Show Status → "Proxy listening: Yes"), and the proxy log at ~/.claude/cache-fix-proxy-log.ndjson should still receive entries on each Claude Code call.

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