dsh-markitdown

中文 | Microsoft MarkItDown integration for DeepSeek Harness (dsh).

Convert PDF, Office, HTML, images, audio and more to Markdown through model-facing tools — no MCP, no bundled binaries. The plugin drives the markitdown Python package (python -m markitdown) in whichever Python interpreter you configure.

What you get

• markitdown_check — probes the configured interpreter and reports the installed MarkItDown version (plus LLM-helper readiness when configured), or the exact setup command when something is missing.
• markitdown_convert — converts one source or a batch to Markdown:
  • path: one absolute local file path or an http(s) URL (e.g. a YouTube link with the [all] extra installed);
  • paths: batch of up to 16 paths/URLs, per-source failures captured;
  • stdinBase64: canonical base64 bytes via MarkItDown stdin (requires extensionHint/mimeHint);
  • hints map to the CLI: extensionHint (-x, also admits unlisted local extensions), mimeHint (-m), charsetHint (-c), keepDataUris; URL sources are downloaded with connection-pinned egress validation (the address that is checked is the address that is connected to — no DNS-rebinding gap) and converted from the downloaded bytes; loopback, private and link-local targets are refused unless allowPrivateUrls;
  • output writes the single-source result to a file, outputDir writes <name>.md per source; otherwise Markdown comes back inline.
• DOCX image export: embedded Word images are exported as files and the data-URI placeholders are replaced with file links, so the session can open the originals (read_image) and ask follow-up questions instead of trusting a one-shot description. With output the images go to a sibling <name>.media/ directory and links are relative; with outputDir each <name>.media/ sits beside its Markdown; inline conversions use a temp directory referenced absolutely. No model or API key is involved.
• Optional image descriptions: on the dedicated Settings → MarkItDown page (not inside the plugin inventory), a toggle turns on model-written descriptions for each exported image, and one card per provider — OpenAI, DeepSeek, or a custom endpoint — keeps each provider's model and API key, with the active card driving conversions. Keys go to the dsh credential store, never the profile configuration; the per-provider apiKeyEnv reference and the environment variable remain as fallbacks. Ships the python/llm_convert.py helper and requires the openai package for descriptions only. DOCX gets extra handling because markitdown 0.1.x never sends Word images to the LLM: the helper unpacks word/media in document order, exports (and, when enabled, describes) each image once, and replaces the placeholders in place. Descriptions run at temperature=0, must transcribe verbatim, mark unreadable text and undeterminable senders instead of guessing, and name the source part for later inspection.
• markitdown skill — bundled workflow (environment check → convert → report caveats) with per-format expectations and known limitations.

Supported local inputs: PDF, DOCX/DOC, PPTX/PPT, XLSX/XLS, CSV, JSON, XML, HTML/HTM, EPUB, MD, Outlook MSG, ZIP (contained files converted in place), JPG/JPEG/PNG/GIF/TIFF/BMP (EXIF, OCR when available), WAV/MP3 (transcription, needs the [all] extra).

Install

Prerequisite: Python with MarkItDown installed in it:

python -m pip install 'markitdown[all]'

Install the plugin into dsh from the Git repository (any profile's Plugins page → install from source, or the equivalent CLI command):

github:AlbertZJ/dsh-markitdown

Configuration

All fields are optional; the defaults work when python on PATH has the package.

- name: 'dsh-markitdown'
  config:
    # Python interpreter running `-m markitdown`. On Windows where only the
    # launcher exists, use `py` or an absolute path, e.g.
    # C:/Users/you/AppData/Local/Programs/Python/Python312/python.exe
    command: python
    timeoutMs: 60000        # per-conversion deadline
    maxInputBytes: 52428800 # 50 MiB source limit
    maxOutputBytes: 8388608 # 8 MiB captured-output cap (process is killed past it)
    # Optional: keep all reads and writes inside one workspace. Paths are
    # resolved with symlinks followed and must stay under this root.
    # allowedRoot: D:/work/documents
    # Optional: LLM-assisted conversion (LLM-described embedded images).
    # Requires `pip install openai`. Configure providers and keys on the
    # Settings → MarkItDown page; the fields below are the profile storage
    # it writes (active provider + one profile per provider).
    # llmProvider: deepseek
    # llmProviders:
    #   openai:   { baseUrl: https://api.openai.com/v1, model: gpt-4o, apiKeyEnv: OPENAI_API_KEY }
    #   deepseek: { baseUrl: https://api.deepseek.com/v1, model: deepseek-chat, apiKeyEnv: DEEPSEEK_API_KEY }
    #   custom:   { baseUrl: https://api.example.com/v1, model: my-model, apiKeyEnv: MARKITDOWN_API_KEY }
    # Legacy single-provider fields, used only when llmProvider is unset:
    # llmModel: gpt-4o
    # llmBaseUrl: https://api.deepseek.com/v1
    # llmApiKeyEnv: OPENAI_API_KEY
    # Have the active model describe each exported DOCX image (default off;
    # images are always exported and linked either way). Toggle it on the
    # Settings → MarkItDown page.
    # describeImages: false
    # Allow URL sources in LLM mode (default off: internal content must not
    # leave the host through the LLM API).
    # llmAllowUrls: false
    # Permit third-party MarkItDown converter plugins (CLI -p); default off.
    # allowPlugins: false
    # Allow URL sources resolving to loopback/private/link-local addresses
    # (default off; SSRF guard for URL conversion).
    # allowPrivateUrls: false

Verify

pnpm install
pnpm run build
pnpm run verify   # structural checks (package, patch, skills, lib, locale)

verify.mjs needs no dependencies and also runs in CI on every push.

Notes and limitations

• Conversion runs as a child process of the dsh host; the harness Bash approval flow does not gate it, so the plugin validates paths (absolute, existing, extension allow-list, size cap) before invoking MarkItDown.
• Scanned PDFs without a text layer convert to little or no text.
• Complex layouts flatten into linear Markdown. DOCX embedded images are exported as files (<name>.media/ beside the Markdown) and linked by path; inline conversions export to a temp directory that the OS may clean up, so pass output/outputDir when the images should persist. With allowedRoot set, inline conversions keep the data URIs rather than writing outside the workspace.
• Image descriptions are one-shot: when exact wording matters, open the exported original (read_image) instead of trusting the description.
• This plugin does not install Python packages by itself; run markitdown_check and follow its setup guidance.

License

MIT. MarkItDown itself is MIT-licensed by Microsoft and is not bundled — install it into your Python environment as above.