fix: identify OpenCode Go requests by session

packages/vscode/src/opencodeGoQuota.ts

@@ -11,7 +11,7 @@ const toWindow = (usedPercent: number, resetAt: string) => ({
 });
 
 export const fetchOpenCodeGoUsage = async (credential: OpenCodeGoCredential) => {
-  const response = await fetch('https://opencode.ai/zen/go/v1/usage', { headers: { Accept: 'application/json', Authorization: `Bearer ${credential.apiKey}` }, signal: AbortSignal.timeout(15_000) });
+  const response = await fetch('https://opencode.ai/zen/go/v1/usage', { headers: { Accept: 'application/json', Authorization: `Bearer ${credential.apiKey}`, 'x-opencode-session': 'openchamber-usage' }, signal: AbortSignal.timeout(15_000) });
   if (response.status === 401 || response.status === 403 || (response.status >= 300 && response.status < 400)) throw new Error('OpenCode Go authentication failed');
   if (!response.ok) throw new Error(`OpenCode Go usage API returned HTTP ${response.status}`);
   const payload = await response.json().catch(() => null) as { usage?: Record<string, { percent?: unknown; resetsAt?: unknown }> } | null;

packages/vscode/src/quotaProviders.test.ts

@@ -99,6 +99,7 @@ describe('OpenCode Go quota provider (VS Code parity)', () => {
 
     assert.equal(result.ok, true);
     assert.equal((request?.headers as Record<string, string>).Authorization, 'Bearer test-token');
+    assert.equal((request?.headers as Record<string, string>)['x-opencode-session'], 'openchamber-usage');
     assert.equal(result.usage!.windows['5h']!.usedPercent, 25);
     assert.throws(() => fs.statSync(legacyPath));
   });