# Shard Document Tool Rule

This rule defines the Shard Document tool.

## Tool Definition

When this tool is triggered, execute the following:

<tool id=".bmad/core/tasks/shard-doc" name="Shard Document"
  description="Splits large markdown documents into smaller, organized files based on level 2 (default) sections" webskip="true"
  standalone="true">
  <objective>Split large markdown documents into smaller, organized files based on level 2 sections using @kayvan/markdown-tree-parser tool</objective>

  <llm critical="true">
    <i>MANDATORY: Execute ALL steps in the flow section IN EXACT ORDER</i>
    <i>DO NOT skip steps or change the sequence</i>
    <i>HALT immediately when halt-conditions are met</i>
    <i>Each action xml tag within step xml tag is a REQUIRED action to complete that step</i>
    <i>Sections outside flow (validation, output, critical-context) provide essential context - review and apply throughout execution</i>
  </llm>

  <critical-context>
    <i>Uses `npx @kayvan/markdown-tree-parser` to automatically shard documents by level 2 headings and generate an index</i>
  </critical-context>

  <flow>
    <step n="1" title="Get Source Document">
      <action>Ask user for the source document path if not provided already</action>
      <action>Verify file exists and is accessible</action>
      <action>Verify file is markdown format (.md extension)</action>
      <action if="file not found or not markdown">HALT with error message</action>
    </step>

    <step n="2" title="Get Destination Folder">
      <action>Determine default destination: same location as source file, folder named after source file without .md extension</action>
      <action>Example: /path/to/architecture.md → /path/to/architecture/</action>
      <action>Ask user for the destination folder path ([y] to confirm use of default: [suggested-path], else enter a new path)</action>
      <action if="user accepts default">Use the suggested destination path</action>
      <action if="user provides custom path">Use the custom destination path</action>
      <action>Verify destination folder exists or can be created</action>
      <action>Check write permissions for destination</action>
      <action if="permission denied">HALT with error message</action>
    </step>

    <step n="3" title="Execute Sharding">
      <action>Inform user that sharding is beginning</action>
      <action>Execute command: `npx @kayvan/markdown-tree-parser [source-document] [destination-folder]`</action>
      <action>Capture command output and any errors</action>
      <action if="command fails">HALT and display error to user</action>
    </step>

    <step n="4" title="Verify Output">
      <action>Check that destination folder contains sharded files</action>
      <action>Verify index.md was created in destination folder</action>
      <action>Count the number of files created</action>
      <action if="no files created">HALT with error message</action>
    </step>

    <step n="5" title="Report Completion">
      <action>Display completion report to user including:</action>
      <i>- Source document path and name</i>
      <i>- Destination folder path</i>
      <i>- Number of section files created</i>
      <i>- Confirmation that index.md was created</i>
      <i>- Any tool output or warnings</i>
      <action>Inform user that sharding completed successfully</action>
    </step>
  </flow>

  <halt-conditions critical="true">
    <i>HALT if npx command fails or produces no output files</i>
  </halt-conditions>
</tool>

## Usage

Reference this tool with `@tool-shard-doc` to execute it.

## Module

Part of the BMAD CORE module.