docs(vision): package READMEs, Model Experience, and the capability Agent Note

Document the four image-recognition packages and the vision group, register the vision domain in the package index, add the capability decision as an Agent Note, declare the invariants peer dep, and drop the unused agents injection from the consumer. Co-Authored-By: Claude <noreply@anthropic.com>
2026-08-14 11:15:59 +08:00
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+# @deepseek-ai/dsh-tool-image-recognition
+
+Model-facing image-recognition consumer. Registers a bundled `image-recognition`
+skill and a `recognize_image` tool, and hooks `agent/pre-step` to deterministically
+inject the skill body when a step input carries an image, so the model recognizes
+the image before continuing the task.
+
+## Config
+
+| Key | Type | Meaning |
+|---|---|---|
+| `detectImageBlocks` | boolean | Inject the skill body when a step input carries an image content block (default true). |
+| `detectImagePaths` | boolean | Inject the skill body when a step input text names an image file path or URL (default true). |
+
+Detection is a cheap signal (image content block or path/URL in text), never an
+image-byte read. The injection guarantees the skill instructions are present; the
+model still drives the actual `recognize_image` call.
+
+## Model Experience
+
+### Tool schema
+
+#### What the model sees
+
+The model sees the generated [`recognize_image` schema](../../../docs/tool-catalog.md#deepseek-aidsh-tool-image-recognition). The tool takes an `image` (file path, https URL, or data URL) and an optional `prompt` naming what to extract, and returns the recognized text from the configured provider.
+
+#### Token effect
+
+Fixed schema cost per request while the tool is visible.
+
+#### KV Cache effect
+
+Prefix-stable while the tool definition and visibility are unchanged.
+
+### Skill body
+
+#### What the model sees
+
+The `image-recognition` skill appears in the session skill catalog and loads through the `skill` tool; its body instructs the model to recognize an image with `recognize_image` first and act on the recognized text as ground truth. The rendered body is:
+
+##### Skill body template
+
+```markdown
+<skill_content name="image-recognition">
+<skill_instructions>
+When the task involves an image (an attached image, an image file path, or an image URL), FIRST recognize its content before continuing the task:
+1. Determine which image the task refers to from the conversation (attachment, path, or URL).
+2. Call `recognize_image` with that image and, when useful, a `prompt` naming what to extract.
+3. Use the recognized text as ground truth to complete the original task.
+Do not guess at image contents from a filename or description — run `recognize_image` and act on its result.
+</skill_instructions>
+</skill_content>
+```
+
+#### Token effect
+
+The catalog entry costs one line; loading the skill body costs its full text once per load.
+
+#### KV Cache effect
+
+Prefix-stable until the skill body loads; the loaded body appends as a new suffix.
+
+### Image-task injection
+
+#### What the model sees
+
+When a step input carries an image (an image content block, or a text block naming an image file path or URL — see Config), the plugin injects the `image-recognition` skill body as a plugin-sourced user message at the front of the step.
+
+#### Token effect
+
+One injected user message per image-bearing step while detection is on.
+
+#### KV Cache effect
+
+Injected messages append after the reusable prefix, forming a per-step suffix that resets when no image is present.
+
+### System prompt section
+
+#### What the model sees
+
+A `tool:image-recognition` system-prompt section adds the guidance below:
+
+##### System prompt guidance
+
+```markdown
+When a task involves an image, recognize it first with `recognize_image` before continuing; do not infer image contents from a filename or description.
+```
+
+#### Token effect
+
+One fixed system-prompt sentence per request.
+
+#### KV Cache effect
+
+Prefix-stable while the guidance text is unchanged.
+
+## Known Limitations and Deferred Work
+
+- Path/URL detection is heuristic and can be disabled; misdetections are possible.
+- Requires a configured, available provider — see `dsh-image-recognition-http`.