refactor(skills): convert index-docs.xml to native skill directory

src/core/module-help.csv

@@ -2,7 +2,7 @@ module,phase,name,code,sequence,workflow-file,command,required,agent,options,des
 core,anytime,Brainstorming,BSP,,_bmad/core/workflows/brainstorming/workflow.md,bmad-brainstorming,false,analyst,,"Generate diverse ideas through interactive techniques. Use early in ideation phase or when stuck generating ideas.",{output_folder}/brainstorming/brainstorming-session-{{date}}.md,,
 core,anytime,Party Mode,PM,,_bmad/core/workflows/party-mode/workflow.md,bmad-party-mode,false,party-mode facilitator,,"Orchestrate multi-agent discussions. Use when you need multiple agent perspectives or want agents to collaborate.",,
 core,anytime,bmad-help,BH,,skill:bmad-help,bmad-help,false,,,"Get unstuck by showing what workflow steps come next or answering BMad Method questions.",,
-core,anytime,Index Docs,ID,,_bmad/core/tasks/index-docs.xml,bmad-index-docs,false,,,"Create lightweight index for quick LLM scanning. Use when LLM needs to understand available docs without loading everything.",,
+core,anytime,Index Docs,ID,,skill:bmad-index-docs,bmad-index-docs,false,,,"Create lightweight index for quick LLM scanning. Use when LLM needs to understand available docs without loading everything.",,
 core,anytime,Shard Document,SD,,_bmad/core/tasks/shard-doc.xml,bmad-shard-doc,false,,,"Split large documents into smaller files by sections. Use when doc becomes too large (>500 lines) to manage effectively.",,
 core,anytime,Editorial Review - Prose,EP,,skill:bmad-editorial-review-prose,bmad-editorial-review-prose,false,,,"Review prose for clarity, tone, and communication issues. Use after drafting to polish written content.",report located with target document,"three-column markdown table with suggested fixes",
 core,anytime,Editorial Review - Structure,ES,,skill:bmad-editorial-review-structure,bmad-editorial-review-structure,false,,,"Propose cuts, reorganization, and simplification while preserving comprehension. Use when doc produced from multiple subprocesses or needs structural improvement.",report located with target document,

src/core/tasks/bmad-index-docs/SKILL.md

@@ -0,0 +1,6 @@
+---
+name: bmad-index-docs
+description: 'Generates or updates an index.md to reference all docs in the folder. Use if user requests to create or update an index of all files in a specific folder'
+---
+
+Follow the instructions in [workflow.md](workflow.md).

src/core/tasks/bmad-index-docs/bmad-skill-manifest.yaml

@@ -0,0 +1 @@
+type: skill

src/core/tasks/bmad-index-docs/workflow.md

@@ -0,0 +1,61 @@
+# Index Docs
+
+**Goal:** Generate or update an index.md to reference all docs in a target folder.
+
+
+## EXECUTION
+
+### Step 1: Scan Directory
+
+- List all files and subdirectories in the target location
+
+### Step 2: Group Content
+
+- Organize files by type, purpose, or subdirectory
+
+### Step 3: Generate Descriptions
+
+- Read each file to understand its actual purpose and create brief (3-10 word) descriptions based on the content, not just the filename
+
+### Step 4: Create/Update Index
+
+- Write or update index.md with organized file listings
+
+
+## OUTPUT FORMAT
+
+```markdown
+# Directory Index
+
+## Files
+
+- **[filename.ext](./filename.ext)** - Brief description
+- **[another-file.ext](./another-file.ext)** - Brief description
+
+## Subdirectories
+
+### subfolder/
+
+- **[file1.ext](./subfolder/file1.ext)** - Brief description
+- **[file2.ext](./subfolder/file2.ext)** - Brief description
+
+### another-folder/
+
+- **[file3.ext](./another-folder/file3.ext)** - Brief description
+```
+
+
+## HALT CONDITIONS
+
+- HALT if target directory does not exist or is inaccessible
+- HALT if user does not have write permissions to create index.md
+
+
+## VALIDATION
+
+- Use relative paths starting with ./
+- Group similar files together
+- Read file contents to generate accurate descriptions - don't guess from filenames
+- Keep descriptions concise but informative (3-10 words)
+- Sort alphabetically within groups
+- Skip hidden files (starting with .) unless specified

src/core/tasks/bmad-skill-manifest.yaml

@@ -1,8 +1,3 @@
-index-docs.xml:
-  canonicalId: bmad-index-docs
-  type: task
-  description: "Generates or updates an index.md to reference all docs in the folder"
-
 shard-doc.xml:
   canonicalId: bmad-shard-doc
   type: task