Clean up smoke trigger label after successful test run

.github/workflows/smoke-codex.md

@@ -49,6 +49,8 @@ safe-outputs:
       close-older-issues: true
     add-labels:
       allowed: [smoke-codex]
+    remove-labels:
+      allowed: [smoke]
     hide-comment:
     messages:
       footer: "> 🔮 *The oracle has spoken through [{workflow_name}]({run_url})*"

.github/workflows/smoke-copilot.md

@@ -51,6 +51,8 @@ safe-outputs:
       close-older-issues: true
     add-labels:
       allowed: [smoke-copilot]
+    remove-labels:
+      allowed: [smoke]
     messages:
       footer: "> 📰 *BREAKING: Report filed by [{workflow_name}]({run_url})*"
       run-started: "📰 BREAKING: [{workflow_name}]({run_url}) is now investigating this {event_type}. Sources say the story is developing..."
@@ -89,4 +91,6 @@ strict: true
    - Overall status: PASS or FAIL
    - Mention the pull request author and any assignees
 
-If all tests pass, add the label `smoke-copilot` to the pull request.
+If all tests pass:
+- Add the label `smoke-copilot` to the pull request
+- Remove the label `smoke` from the pull request

actions/setup/js/safe_outputs_tools.json

@@ -304,13 +304,15 @@
           "items": {
             "type": "string"
           },
-          "description": "Label names to remove (e.g., ['bug', 'needs-triage']). Labels that don't exist on the item are silently skipped."
+          "minItems": 1,
+          "description": "Label names to remove (e.g., ['bug', 'needs-triage']). Labels that don't exist on the item are silently skipped. At least one label must be provided."
         },
         "item_number": {
           "type": "number",
           "description": "Issue or PR number to remove labels from. This is the numeric ID from the GitHub URL (e.g., 456 in github.com/owner/repo/issues/456). If omitted, removes labels from the item that triggered this workflow."
         }
       },
+      "required": ["labels"],
       "additionalProperties": false
     }
   },