jackwener/OpenCLI · error · CommandExecutionError

Bilibili conclusion API returned malformed model_result

Error message

Bilibili conclusion API returned malformed model_result

What it means

After parsing (or when model_result is already an object), readModelResult validates that model_result is a non-null, non-array object. Bilibili's conclusion API can return model_result as null or an unexpected scalar when no AI summary exists; this CommandExecutionError signals the response shape is not the expected summary structure.

Source

Thrown at clis/bilibili/summary.js:88

}

function readModelResult(data, bvid) {
    if (!data || typeof data !== 'object' || Array.isArray(data)) {
        throw new CommandExecutionError('Bilibili conclusion API returned malformed data');
    }
    if (data.code !== 0) {
        throw new EmptyResultError('bilibili summary', `Bilibili has not generated an AI summary for ${bvid}.`);
    }
    let modelResult = data.model_result;
    if (typeof modelResult === 'string') {
        try {
            modelResult = JSON.parse(modelResult);
        } catch {
            throw new CommandExecutionError('Bilibili conclusion API returned malformed model_result JSON');
        }
    }
    if (!modelResult || typeof modelResult !== 'object' || Array.isArray(modelResult)) {
        throw new CommandExecutionError('Bilibili conclusion API returned malformed model_result');
    }
    const summary = String(modelResult.summary ?? '').trim();
    if (!summary) {
        throw new EmptyResultError('bilibili summary', `Bilibili has not generated an AI summary for ${bvid}.`);
    }
    const outline = modelResult.outline ?? [];
    if (!Array.isArray(outline)) {
        throw new CommandExecutionError('Bilibili conclusion API returned malformed outline');
    }
    return { summary, outline };
}

function rowsFromModel(model) {
    const rows = [{ time: '', content: model.summary }];
    for (const section of model.outline) {
        if (!section || typeof section !== 'object' || Array.isArray(section)) {
            throw new CommandExecutionError('Bilibili conclusion API returned malformed outline section');
        }

View on GitHub (pinned to 49907e53dc)

Solutions

  1. Check whether the video actually has an AI summary (try it in the Bilibili web UI) — absence is a valid API outcome, not necessarily a bug.
  2. Log data.model_result and its typeof before the call to see the real shape.
  3. Confirm you are passing the conclusion payload's model_result, not the whole response.
  4. Handle null model_result as an empty-summary case in your own wrapper.
  5. Update the client if Bilibili changed the response schema.

Example fix

// before
if (!modelResult || typeof modelResult !== 'object' || Array.isArray(modelResult)) {
    throw new CommandExecutionError('Bilibili conclusion API returned malformed model_result');
}
// after
if (!modelResult || typeof modelResult !== 'object' || Array.isArray(modelResult)) {
    return null; // no AI summary for this video
}
Defensive patterns

Strategy: type-guard

Validate before calling

const mr = data?.model_result;
const ok = mr !== null && typeof mr === 'object' && !Array.isArray(mr);
if (!ok) console.warn('no usable model_result for', bvid);

Type guard

function isModelResult(v) {
  return v !== null && typeof v === 'object' && !Array.isArray(v) && typeof v.summary === 'string';
}

Try / catch

try {
  const model = await readModelResult(page, bvid);
} catch (e) {
  if (String(e.message).endsWith('malformed model_result')) return null;
  throw e;
}

Prevention

When it happens

Trigger: model_result is null, a number/boolean, or an array — e.g. the conclusion endpoint returned code 0 but with an empty model_result, or the caller passed the wrong payload object into readModelResult.

Common situations: Videos without an AI conclusion where the API still returns code 0; API contract changes on Bilibili's side; accidentally passing the outer response or view payload instead of the conclusion payload.

Understand the failure class

Background: Schema validation failed / invalid input schema: payload rejected because its shape doesn't match the expected schema — this error's family across 28 libraries.

Related errors

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/8cab0ea6c3d7420e. Report an issue: GitHub.