{"record":{"id":"08998a335775946c","repo":"musistudio/claude-code-router","slug":"aspect-ratio-is-required-for-target-protocol","errorCode":null,"errorMessage":"aspect_ratio is required for ${target.protocol}.","messagePattern":"aspect_ratio is required for (.+?)\\.","errorType":"validation","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/core/src/media/service.ts","lineNumber":170,"sourceCode":"    const constraints = videoGenerationConstraints(target.protocol);\n    const durationValue = numberValue(args.duration) ?? constraints.defaultDuration;\n    if (durationValue === undefined) throw new Error(`duration is required for ${target.protocol}.`);\n    if (!Number.isInteger(durationValue)) throw new Error(\"duration must be an integer number of seconds.\");\n    if (constraints.durations && !constraints.durations.includes(durationValue)) {\n      throw new Error(`duration must be one of ${constraints.durations.join(\", \")} seconds for ${target.protocol}.`);\n    }\n    if (constraints.durationMinimum !== undefined && constraints.durationMaximum !== undefined &&\n      (durationValue < constraints.durationMinimum || durationValue > constraints.durationMaximum)) {\n      throw new Error(`duration must be between ${constraints.durationMinimum} and ${constraints.durationMaximum} seconds for ${target.protocol}.`);\n    }\n    const resolution = optionalString(args.resolution) ?? constraints.defaultResolution;\n    if (!resolution) throw new Error(`resolution is required for ${target.protocol}.`);\n    if (!constraints.resolutions.includes(resolution)) {\n      throw new Error(`resolution must be one of ${constraints.resolutions.join(\", \")} for ${target.protocol}.`);\n    }\n    const aspectRatio = optionalString(args.aspect_ratio);\n    if (constraints.requiredParameters.includes(\"aspect_ratio\") && !aspectRatio) {\n      throw new Error(`aspect_ratio is required for ${target.protocol}.`);\n    }\n    if (aspectRatio && !constraints.aspectRatios.includes(aspectRatio)) {\n      throw new Error(`aspect_ratio must be one of ${constraints.aspectRatios.join(\", \")} for ${target.protocol}.`);\n    }\n    const request: VideoGenerateRequest = {\n      aspectRatio,\n      duration: durationValue,\n      images: args.images === undefined && args.image === undefined ? [] : this.validateImages(args.images ?? args.image, 1, 7),\n      prompt: requiredPrompt(args.prompt),\n      resolution\n    };\n    const job = this.submit(\"video-generate\", request, modelPlan, optionalString(args.idempotency_key));\n    return this.publicJob(job);\n  }\n\n  getJob(id: string): PublicMediaJob {\n    const job = this.jobStore.get(id);\n    if (!job) throw new Error(`Media job not found: ${id}`);","sourceCodeStart":152,"sourceCodeEnd":188,"githubUrl":"https://github.com/musistudio/claude-code-router/blob/99f24806c6a2c660b16e53e95211c517448a6c90/packages/core/src/media/service.ts#L152-L188","documentation":"Thrown when the protocol marks aspect_ratio as a required parameter (constraints.requiredParameters includes \"aspect_ratio\") and no aspect_ratio argument was provided. Only some providers make this mandatory.","triggerScenarios":"Starting video generation on a protocol that requires aspect_ratio without passing args.aspect_ratio.","commonSituations":"Switching to a provider that mandates aspect ratio where the previous one defaulted it (e.g. 16:9); minimal request payloads copied from another integration.","solutions":["Pass an allowed aspect ratio: videoStart({ aspect_ratio: \"16:9\", ... })","Check constraints.aspectRatios for the accepted values (listed in error 218's message)","Drive your UI's required-field state from constraints.requiredParameters"],"exampleFix":"// before\nmedia.videoStart({ prompt, duration: 5, resolution: \"720p\" }, modelInput);\n\n// after\nmedia.videoStart({ prompt, duration: 5, resolution: \"720p\", aspect_ratio: \"16:9\" }, modelInput);","handlingStrategy":"validation","validationCode":"const c = videoGenerationConstraints(protocol);\nif (c.requiredParameters.includes(\"aspect_ratio\") && !args.aspect_ratio) {\n  throw new Error(\"aspect_ratio required\");\n}","typeGuard":"const requiresAspectRatio = (c: VideoConstraints): boolean =>\n  c.requiredParameters.includes(\"aspect_ratio\");","tryCatchPattern":null,"preventionTips":["Mark aspect_ratio required in the UI when the protocol demands it","Pass a known-good default like 16:9 when unsure"],"tags":["media","video","validation","aspect-ratio"],"backgroundTag":"missing-required-parameter","analyzedSha":"99f24806c6a2c660b16e53e95211c517448a6c90","analyzedAt":"2026-08-27T04:11:01.184Z","schemaVersion":2},"datasetVersion":"2026-08-27T08:17:20.692Z"}