deepseek-ai/deepseek-harness · error · Error

cannot read "${requestedPath}" as an image: the current mode

Error message

cannot read "${requestedPath}" as an image: the current model route could not be resolved

What it means

Error "cannot read "${requestedPath}" as an image: the current model route could not be resolved" thrown in deepseek-ai/deepseek-harness.

Source

Thrown at packages/fs/tool-fs/src/read-image.ts:93

export function imageMediaTypeForPath(filePath: string): ImageMediaType | undefined {
  return IMAGE_EXTENSIONS[extname(filePath).toLowerCase()]
}

/**
 * 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,

View on GitHub (pinned to b150a551b8)

When it happens

Trigger: Thrown at packages/fs/tool-fs/src/read-image.ts:93 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/789f973335c4ddf2. Report an issue: GitHub.