Impact

Manual runs of Internal: Upgrade Check and Internal: Workflow Patrol cannot provide a model override, because both workflows reference $\{\{ inputs.model }} without declaring a model input. This makes model selection impossible for users dispatching these workflows and silently falls back to default behavior.

Reproduction Steps

1. Create this new minimal repro script:

import re
from pathlib import Path
import yaml

FILES = [
    Path('.github/workflows/upgrade-check.lock.yml'),
    Path('.github/workflows/workflow-patrol.lock.yml'),
]
INPUT_REF_RE = re.compile(r"\$\{\{\s*inputs\.([A-Za-z0-9_-]+)\s*\}\}")


def get_defined_inputs(doc):
    on = doc.get('on', {}) or {}
    wd_inputs = ((on.get('workflow_dispatch', {}) or {}).get('inputs', {}) or {}).keys()
    wc_inputs = ((on.get('workflow_call', {}) or {}).get('inputs', {}) or {}).keys()
    return set(wd_inputs) | set(wc_inputs)


def main():
    failures = []
    for path in FILES:
        text = path.read_text(encoding='utf-8')
        used = set(INPUT_REF_RE.findall(text))
        doc = yaml.safe_load(text) or {}
        defined = get_defined_inputs(doc)
        undefined = sorted(used - defined)
        if undefined:
            failures.append((str(path), undefined))

    if failures:
        print('FAIL: workflow references undefined input(s)')
        for path, names in failures:
            print(f'- {path}: {names}')
        raise SystemExit(1)

    print('PASS: all referenced inputs are declared')


if __name__ == '__main__':
    main()

2. Run:

python /tmp/gh-aw/agent/repro_undefined_model_input.py

Expected vs Actual

Expected: Any referenced workflow input (including model) is declared under on.workflow_dispatch.inputs and/or on.workflow_call.inputs.

Actual: The repro fails with undefined inputs:

FAIL: workflow references undefined input(s)
- .github/workflows/upgrade-check.lock.yml: ['model']
- .github/workflows/workflow-patrol.lock.yml: ['model']

Failing Test

(Full script shown above under Reproduction Steps.)

Evidence

• .github/workflows/upgrade-check.lock.yml:54-60 declares only title-prefix for workflow_dispatch.inputs, but references inputs.model at lines 142, 443, and 462.
• .github/workflows/workflow-patrol.lock.yml:54-60 declares only title-prefix for workflow_dispatch.inputs, but references inputs.model at lines 142, 433, and 452.
• Repro script exits non-zero (EXIT:1) and prints both undefined-input failures.

What is this? | From workflow: Trigger Bug Hunter

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• expires on Mar 10, 2026, 11:26 AM UTC