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Automated CLI reference docs

docs-builder can generate a complete CLI reference section from a JSON schema file that describes your tool's commands, namespaces, flags, and arguments. The generated pages render usage synopses, parameter definitions, and examples directly from that schema — no hand-maintained markdown required.

The schema format is documented at argh-cli-schema.json.

Note

docs-builder supports automatic schema generation through the __schema meta-command, a built-in feature of the Nullean.Argh CLI framework. For other frameworks, add a command or script to your build tooling that writes an equivalent JSON file.

  1. Create a schema file

    Add a mechanism to your CLI that outputs a schema JSON matching the argh-cli-schema.json format. The schema describes your CLI's structure: top-level commands, namespaces, nested sub-namespaces, per-parameter types and descriptions, usage synopses, and examples.

    Once you have a way to generate the schema, write it to a file in your docs repository and commit it:

    # Example — replace with whatever generates your schema
my-tool export-schema > docs/cli-schema.json

    Commit that file. It is the source of truth for the generated reference section.

    Tip

    Add a CI step that regenerates the schema and fails if the checked-in copy has drifted:

    - name: Check CLI schema is up to date
  run: |
    my-tool export-schema > docs/cli-schema.json.tmp
    diff docs/cli-schema.json docs/cli-schema.json.tmp || \
      (echo "cli-schema.json is out of date — regenerate and commit it" && exit 1)
    rm docs/cli-schema.json.tmp

  2. Add a cli: entry to docset.yml

    In your docset.yml, add a cli: entry to the toc: section pointing at the schema file:

    toc:
  - cli: cli-schema.json

    That's the minimal setup. docs-builder generates a navigation subtree and a page for every namespace and command.

    To give the section a stable URL prefix and a home for supplemental docs, also set folder: to the directory name you want to use:

    toc:
  - cli: cli-schema.json
    folder: cli-reference

    Use children: to prepend hand-written pages — installation guides, conceptual overviews, or quick-start tutorials — before the auto-generated reference. All schema-generated pages follow the listed children:

    toc:
  - cli: cli-schema.json
    folder: cli-reference
    children:
      - file: installation.md
      - file: getting-started.md

  3. Write supplemental content for namespaces and commands

    Drop a supplemental file into the folder for any namespace or command page where you want to add context, usage examples, or richer parameter descriptions. The generated parameter table and usage synopsis are always present — supplemental files let you add to them.

    See Writing supplemental content for the full rules on file naming and heading conventions.

  4. Done

    Your CLI reference section is live. As your CLI evolves, regenerate the schema and commit — the docs update automatically on the next build.

    Navigation indicators — generated pages show a ns (purple) or cmd (amber) badge in the sidebar, making it easy to see at a glance which pages come from the schema and which are hand-written.

    Schema version — the JSON includes a schemaVersion field. Check the schema spec for the current version when updating your schema generator.

docset.yml key Description
cli: <path> Path to the schema JSON, relative to docset.yml
folder: <path> Supplemental docs folder; also sets the URL prefix
children: Regular toc items prepended before generated pages