jackwener/OpenCLI · error · CommandExecutionError

Gemini model discovery returned a malformed result

Error message

Gemini model discovery returned a malformed result

What it means

requireDiscoveredModels in clis/gemini/ask.js checks that, after envelope unwrapping, model discovery yielded an array. If the unwrapped value is not an array, this CommandExecutionError is thrown. It ensures askCommand only proceeds with a well-formed list of discovered model rows.

Source

Thrown at clis/gemini/ask.js:39

}
const NO_RESPONSE_PREFIX = '[NO RESPONSE]';

/**
 * Validate a --model value for gemini ask.
 * Throws ArgumentError for short aliases or invalid formats.
 */
function unwrapBrowserBridgeEnvelope(value) {
    if (value && typeof value === 'object' && !Array.isArray(value) && 'session' in value) {
        if ('data' in value) return value.data;
        throw new CommandExecutionError('Gemini model discovery returned a malformed Browser Bridge envelope');
    }
    return value;
}

function requireDiscoveredModels(value) {
    const unwrapped = unwrapBrowserBridgeEnvelope(value);
    if (!Array.isArray(unwrapped)) {
        throw new CommandExecutionError('Gemini model discovery returned a malformed result');
    }
    for (const row of unwrapped) {
        if (!row || typeof row.model !== 'string' || !Array.isArray(row.thinkingValues)) {
            throw new CommandExecutionError('Gemini model discovery returned a malformed row');
        }
    }
    return unwrapped;
}

function validateAskModelValue(value) {
    if (!value) {
        throw new ArgumentError(
            '--model requires a canonical model id (e.g. "2.5-flash"). ' +
            'Use "opencli gemini models" to list available values.'
        );
    }
    // Reject short aliases like "pro", "flash", "flash-lite" that lack a version number.
    if (!/\d+\.\d+/.test(value)) {

View on GitHub (pinned to 49907e53dc)

Solutions

1. Run `opencli gemini models` to verify discovery works on this account/session
2. Retry the ask command after the browser page fully loads
3. Pass `--model` explicitly with a canonical id (e.g. 2.5-flash) to bypass reliance on discovery output shape
4. Update opencli if Gemini's UI changed the discovery result shape

Example fix

null

if (!Array.isArray(discoveryResult)) {
  console.warn('Model discovery did not yield a list; pass --model explicitly');
}

function isDiscoveredModelArray(value) {
  return Array.isArray(value) && value.length > 0 &&
    value.every(r => r && typeof r.model === 'string' && Array.isArray(r.thinkingValues));
}

try {
  const models = await geminiAsk(args);
} catch (err) {
  if (err.message.includes('malformed result')) {
    // fall back to explicit model selection
    return geminiAsk({ ...args, model: '2.5-flash' });
  }
  throw err;
}

When it happens

Trigger: `opencli gemini ask` runs model discovery and receives `null`, `undefined`, an object, or a string after envelope unwrap — e.g. discovery found no models and the bridge returned null instead of [].

Common situations: Gemini UI rendered a variant page without the model list; bridge automation failed silently and returned an empty/None result; regional or A/B UI differences change discovery output type.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

Related errors

• Gemini model discovery returned a malformed Browser Bridge e
• Gemini model discovery returned a malformed row
• ${pickerResult?.reason || 'Failed to open Gemini model picke
• Gemini model discovery returned no selectable models. Gemini
• Could not select thinking level '${thinkingValue}' in the Ge

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/91ffeb89a4cd2939. Report an issue: GitHub.