Generate WDK DDI API reference documentation pages from source code and stubs. Use when: writing API docs, generating reference pages, documenting a header, creating DDI documentation.
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Generate WDK DDI API reference documentation pages from source code and stubs. Use when: writing API docs, generating reference pages, documenting a header, creating DDI documentation.
argument-hint
Specify a header name (e.g. soundwireclass) and the path to the CSV file.
Generate API Docs
Generate complete API reference documentation pages for WDK DDI entities by combining stub files, OS source code declarations, and supplemental information from published docs.
No local repo clones required. All repo interactions use the Azure DevOps REST API. OS source lookups use the substrate-mcp MCP server.
Parameters
Parameter
Value
ADO Org
https://dev.azure.com/cpubwin
ADO Project
drivers
Docs Repo
wdk-ddi (branches: main, stubs/main)
Published Docs Repo
windows-driver-docs-ddi (branch: staging)
Content Path
wdk-ddi-src/content/{header}/
Stubs Branch
stubs/main (default; user may specify alternate)
Header Name
Provided by the user (without .h extension for path operations)
CSV Path
Provided by the user at any local path (e.g. D:\work\soundwireclass.csv)
Working Directory
Derived from CSV path (parent folder of the CSV file)
Output Path
{working_dir}\output\
Style Guide
Read remotely from wdk-ddi repo: .github/copilot-instructions.md on main
Prerequisites
The user provides a header name and a path to a CSV file (pre-provided or from the ai-docs-inventory skill). That is the only user requirement.
The substrate-mcp MCP server must be accessible for source code retrieval
The microsoft.docs.mcp MCP server should be accessible for supplemental info (non-fatal if unavailable)
Azure CLI (az) should be available for auth token acquisition. If not, the agent will prompt for an ADO Personal Access Token (PAT) once per session.
Procedure
Strip the .h extension from the user-provided header name to get {header} (e.g. soundwireclass.h → soundwireclass).
Resolve paths. The user provides a CSV path. Derive the working directory from it:
$csvPath = "{user-provided CSV path}"
if (-not (Test-Path $csvPath)) {
Write-Error "CSV not found at $csvPath. Please provide the CSV file first."
return
}
$workingDir = Split-Path $csvPath -Parent
$outputDir = Join-Path $workingDir "output"
Import-Csv $csvPath
If the CSV does not exist, inform the user and stop.
Obtain ADO auth token. Try Azure CLI first, then fall back to prompting for a PAT:
Parse the CSV file to get the list of target filenames. The CSV has a header row and one filename column with paths like wdk-ddi-src/content/{header}/{filename}.md.
Create the output directory if it doesn't exist; if it does, clear it:
For each target file listed in the CSV, skip index.md (the header landing page is handled separately in step 8).
For each remaining target file:
a. Get the stub or existing file
Use the ADO REST API to check if the file already exists on main:
# List files on main branch
$mainFiles = Invoke-RestMethod -Uri "$adoBase/wdk-ddi/items?scopePath=wdk-ddi-src/content/{header}/&recursionLevel=OneLevel&versionDescriptor.version=main&versionDescriptor.versionType=branch&api-version=7.0" -Headers $headers
List of all generated/updated files in {outputDir}
For each file, show the first 20 lines (frontmatter + description) as a sample
Highlight any metadata fields marked as TODO that the user should fill in manually (e.g. req.lib, req.dll, req.irql if not determinable from source)
Prompt the user to review the markdown files at: {outputDir}
Continue or stop. Ask the user:
Docs generated and ready for review in {outputDir}. Please review the files before proceeding — once submitted, a PR will be created in the wdk-ddi repo. Press y to submit them as a PR, or type n to stop and review further.
If the user types y: automatically invoke the ai-docs-submit skill, passing the same header name. Behave as if the user typed /ai-docs-submit {header}.
If the user types n: stop and tell them they can run it later with: /ai-docs-submit {header}
Tip: To run all three steps (inventory → generate → submit) with no interaction, use the ai-docs-autopilot skill instead.
If the target filename appears in the listing, retrieve it from main and use its content as the starting point — preserve existing text, but always update ms.date to today's date when making any content changes. Only write the file to the output folder if you make changes. Do not copy unchanged files.
Find 1-2 completed reference pages in the same header folder to use as formatting models. Use the ADO REST API to list files, then retrieve them:
# List existing completed docs of the same entity type in the {header} folder
$mainFiles = Invoke-RestMethod -Uri "$adoBase/wdk-ddi/items?scopePath=wdk-ddi-src/content/{header}/&recursionLevel=OneLevel&versionDescriptor.version=main&versionDescriptor.versionType=branch&api-version=7.0" -Headers $headers
# Filter for files matching the same prefix (e.g. "nf-") and pick 1-2
If no completed pages exist in the same folder, look in a related header folder. Read these model files to match their style.
e. Write the completed documentation page
Write the completed file to {outputDir}\{filename.md}. Follow these rules:
YAML Frontmatter
Preserve all existing metadata from the stub
Add ai-usage: ai-assisted if not already present
Set techroot to the same value as existing files in the same header folder. If no existing files, prompt user for value.
Always set ms.date to today's date in MM/DD/YYYY format — both for new files and when updating existing files with changes
Verify req.header, f1_keywords, api_name, topic_type are correct
req.header uses lowercase (e.g. classpnp.h). req.include-header uses sentence capitalization (e.g. Classpnp.h). Note that req.include-header does not always require a value — omit it or leave it empty when an include header is not applicable.
req.construct-type for macros: If the source declaration is a preprocessor macro (#define), set req.construct-type: macro, not function. The file prefix remains nf- and the title should say "macro" (e.g. CLEAR_FLAG_NOFENCE macro (classpnp.h)).
Leading underscores in UIDs: If the stub file's UID uses a leading underscore (e.g. NE:wdbgexts._POOL_HEADER_FIELD_NAME), preserve that underscore in the UID of the generated document. However, all customer-facing content (title, description, headings, prose) must use the version without the leading underscore (e.g. POOL_HEADER_FIELD_NAME). For api_name: and f1_keywords:, include both versions — the underscored name and the public name — so the page is discoverable by either form.
Content Sections (in order)
## -description
Write a concise one-paragraph summary of what the API does
Focus on the public API behavior, not internal implementation
Use bold for API names referenced in text
## -parameters (functions/callbacks/macros)
One ### -param {Name} [{direction}] subsection per parameter
Map SAL annotations to direction labels:
_In_ → [in]
_Out_ → [out]
_Inout_ → [in, out]
_In_opt_ → [in, optional]
_Out_opt_ → [out, optional]
_Reserved_ → [in] with note "Reserved. Must be zero/NULL."
Describe each parameter concisely
Macro parameters requiring address-of (&): If the macro implementation takes the address of a parameter (e.g. &(Flags)), describe the parameter as "An addressable {type} storage location (such as a variable or structure field)" rather than "A {type} value." A macro that takes &(param) requires an lvalue, not an arbitrary expression.
## -struct-fields (structures only)
One ### -field {FieldName} subsection per field
Union types use the structure classification. If the C source declares a union, it is still documented with the ns- file prefix and req.construct-type: structure. All prose (description, field descriptions, remarks, and cross-references from other pages) must call it a "structure", never a "union." The heading should read # {NAME} structure, not # {NAME} union.
## -enum-fields (enumerations only)
One ### -field {ValueName}:{NumericValue} subsection per value (if numeric value is known)
## -ioctlparameters (IOCTLs only)
Document input buffer, output buffer, and status block
## -returns (functions with return values)
Document the return type and possible return values
For NTSTATUS returns, list common status codes
## -remarks
Add usage notes, IRQL requirements, important caveats
Include code examples when helpful
If the entity is an extended version (ends in Ex, or a number like 2, 3, or V2), reference the base entity and document only the extensions
Don't generate repetitive information
Don't include internal implementation details
## -see-also
List related APIs as relative Markdown links, one per line
Write entries in alphabetical order
Use relative paths: [**OtherFunc**](nf-{header}-otherfunc.md) for same-header APIs
Use ../ paths for cross-header: [**CrossFunc**](../otherheader/nf-otherheader-crossfunc.md)
Formatting Rules
Use bold for API names in prose: **IoCreateFile**
Use italic for parameter name references in prose: *DesiredAccess*
Use site-relative links for learn.microsoft.com content: [title](/windows-hardware/drivers/...)
Code blocks use cpp language tag
Ensure exactly one blank line at the end of the file
Handle the header landing page (index.md). The landing page is automatically updated during the build to reflect the current API set, so it almost never needs manual editing once published.
Check if index.md already exists on main of wdk-ddi or staging of the published docs repo using the ADO REST API:
Content rules for a new index.md: After retrieving the stub, ensure the ## -description section follows this strict format:
Write no more than one sentence describing the header.
Immediately follow it with: This header is used by {tech.root display name}. For more information, see: [{tech.root display name}](../{tech.root}/index.md).
Replace {tech.root display name} with the human-readable technology area name and {tech.root} with the tech.root value from the frontmatter (e.g. _netvista → [Networking](/windows-hardware/drivers/ddi/_netvista/)).
Do not add any sections after -description. There must be no -remarks or -see-also sections in an index.md file.
Close editor tabs. After all files have been written to {outputDir}, close all open editor tabs so the workspace is not cluttered with generated files. Run the VS Code command workbench.action.closeAllEditors to close them.
