deepseek-ai/deepseek-harness · error · Error

cannot read "${requestedPath}" as an image: model "${model}"

Error message

cannot read "${requestedPath}" as an image: model "${model}" does not declare image input; switch to an image-capable model to read images

What it means

Error "cannot read "${requestedPath}" as an image: model "${model}" does not declare image input; switch to an image-capable model to read images" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/fs/tool-fs/src/read-image.ts:97

/**
 * Enforce the strict image-capability gate for the calling route. Resolves the
 * session's latest routed provider/model (request header config, then agent
 * options) and requires the exact resolved route to declare `image` input explicitly.
 * @param ctx - the plugin context used to resolve the optional `llm` service.
 * @param exec - the tool-execution context supplying the calling agent.
 * @param requestedPath - the raw, not-yet-resolved path rendered in refusal messages.
 */
export async function assertImageCapableRoute(ctx: Context, exec: ToolExecution, requestedPath: string): Promise<void> {
  const routed = exec.agent?.session.requestHeader()?.config
  const provider = routed?.provider ?? exec.agent?.options.provider
  const model = routed?.model ?? exec.agent?.options.model
  const llm = ctx.get('llm')
  if (provider === undefined || model === undefined || llm === undefined) {
    throw new Error(`cannot read "${requestedPath}" as an image: the current model route could not be resolved`)
  }
  const active = await llm.resolveModelInfo(provider, model, exec.signal)
  if (active.inputModalities === undefined || !active.inputModalities.includes('image')) {
    throw new Error(`cannot read "${requestedPath}" as an image: model "${model}" does not declare image input; switch to an image-capable model to read images`)
  }
}

/**
 * Re-brand a structured image outcome into the durable attachment reference an
 * `ImageBlock` carries.
 * @param image - the image metadata from the output schema.
 * @returns the branded attachment reference.
 */
export function imageRefFromValue(image: ImageReadValue['image']): ImageAttachmentRef {
  return {
    attachmentId: AttachmentId(image.attachmentId),
    mediaType: image.mediaType,
    bytes: image.bytes,
    width: image.width,
    height: image.height,
    ...image.name === undefined ? {} : { name: image.name },
    ...image.originalDimensions === undefined ? {} : {

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/fs/tool-fs/src/read-image.ts:97 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of deepseek-ai/deepseek-harness@b150a551b8 (2026-08-24). Data as JSON: /api/errors/637f6f29a2c8e5d7. Report an issue: GitHub.