fix: use Responses for Azure o4-mini smoke requests

.github/workflows/smoke-copilot-byok-aoai-apikey.md

@@ -55,6 +55,8 @@ safe-outputs:
 timeout-minutes: 15
 env:
   COPILOT_MODEL: o4-mini-aw
+  # Copilot's chat-completions fallback sends temperature=0, which o4-mini rejects.
+  COPILOT_PROVIDER_WIRE_API: responses
 sandbox:
   agent:
     id: awf

.github/workflows/smoke-copilot-byok-aoai-entra.md

@@ -60,6 +60,8 @@ safe-outputs:
 timeout-minutes: 15
 env:
   COPILOT_MODEL: o4-mini-aw
+  # Copilot's chat-completions fallback sends temperature=0, which o4-mini rejects.
+  COPILOT_PROVIDER_WIRE_API: responses
   AWF_AUTH_TYPE: github-oidc
   AWF_AUTH_PROVIDER: azure
 sandbox:

docs/api-proxy-sidecar.md

@@ -1012,6 +1012,11 @@ not a production-wide alias or a generic fallback. Update the confirmed mapping
 and pinned pricing together if that Azure deployment changes its underlying
 model.
 
+Both smokes explicitly select `COPILOT_PROVIDER_WIRE_API=responses` so Copilot
+does not send its generic chat-completions `temperature=0` default, which
+`o4-mini` rejects. The wire deployment remains `o4-mini-aw`, and the same
+workflow-scoped prices and budget limits apply.
+
 ### Caller attribution (`x-awf-caller`)
 
 The agent harness may set an optional `x-awf-caller` request header so that

scripts/ci/configure-aoai-smoke-pricing.test.ts

@@ -87,6 +87,17 @@ test.each(['apikey', 'entra'])('postprocessing configures only the Azure %s smok
   expect(() => applyGeneralWorkflowPatches('', workflow)).toThrow('Missing AWF config staging');
 });
 
+test.each(['apikey', 'entra'])('the %s smoke uses Responses without changing the priced wire deployment', mode => {
+  const name = `smoke-copilot-byok-aoai-${mode}`;
+  const source = fs.readFileSync(path.join(root, `.github/workflows/${name}.md`), 'utf8');
+  const lock = fs.readFileSync(path.join(root, `.github/workflows/${name}.lock.yml`), 'utf8');
+  for (const content of [source.split('---')[1], lock]) {
+    expect(yaml.load(content)).toMatchObject({
+      env: { COPILOT_MODEL: 'o4-mini-aw', COPILOT_PROVIDER_WIRE_API: 'responses' },
+    });
+  }
+});
+
 test.each(['apikey', 'entra'])('the actual generated %s config stage installs pricing before AWF launches', mode => {
   const lockPath = path.join(root, `.github/workflows/smoke-copilot-byok-aoai-${mode}.lock.yml`);
   const content = fs.readFileSync(lockPath, 'utf8');