fix: resolve markdownlint issues

- Convert bold pseudo-headings to proper headings
- Fix heading level increments (h2→h3, not h2→h4)
- Add blank lines around headings
- Remove extra blank lines in README
- Fix bare URL for email address

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: sjnims

README.md

@@ -192,7 +192,6 @@ Use this workflow for structured, high-quality plugin development from concept t
 
 **Use when:** Creating new skills for plugins or improving existing skill quality.
 
-
 ## Installation
 
 Install from claude-code-marketplace:
@@ -223,7 +222,6 @@ cc --plugin-dir /path/to/plugin-dev
    - Ask: "Create a PreToolUse hook that validates file writes"
    - The hook-development skill gives working examples and utilities
 
-
 ## Development Workflow
 
 The plugin-dev toolkit supports your entire plugin development lifecycle:
@@ -391,7 +389,7 @@ This plugin is part of the claude-code-marketplace. To contribute improvements:
 
 ## Author
 
-Daisy Hollman (daisy@anthropic.com)
+Daisy Hollman (<daisy@anthropic.com>)
 
 ## License
 

plugins/plugin-dev/commands/create-plugin.md

@@ -422,4 +422,4 @@ Every component must meet these standards:
 
 ---
 
-**Begin with Phase 1: Discovery**
+Begin with Phase 1: Discovery.

plugins/plugin-dev/skills/command-development/references/testing-strategies.md

@@ -298,7 +298,7 @@ EOF
 
 **Test scenarios:**
 
-**Scenario 1: Command + Hook Integration**
+#### Scenario 1: Command + Hook Integration
 
 ```bash
 # Setup: Command that triggers a hook
@@ -311,7 +311,7 @@ EOF
 # Verify: Hook executes and validates before command completes
 ```
 
-**Scenario 2: Command Sequence**
+#### Scenario 2: Command Sequence
 
 ```bash
 # Setup: Multi-command workflow
@@ -325,7 +325,7 @@ EOF
 # Verify: State file cleaned up
 ```
 
-**Scenario 3: Command + MCP Integration**
+#### Scenario 3: Command + MCP Integration
 
 ```bash
 # Setup: Command uses MCP tools
@@ -643,7 +643,7 @@ Before releasing a command:
 
 ### Common Issues and Solutions
 
-**Issue: Command not appearing in /help**
+#### Issue: Command not appearing in /help
 
 ```bash
 # Check file location
@@ -659,7 +659,7 @@ head -n 20 .claude/commands/my-command.md
 claude --debug
 ```
 
-**Issue: Arguments not substituting**
+#### Issue: Arguments not substituting
 
 ```bash
 # Verify syntax
@@ -670,7 +670,7 @@ grep '\$ARGUMENTS' .claude/commands/my-command.md
 echo "Test: \$1 and \$2" > .claude/commands/test-args.md
 ```
 
-**Issue: Bash commands not executing**
+#### Issue: Bash commands not executing
 
 ```bash
 # Check allowed-tools
@@ -684,7 +684,7 @@ date
 echo "test"
 ```
 
-**Issue: File references not working**
+#### Issue: File references not working
 
 ```bash
 # Check @ syntax

plugins/plugin-dev/skills/hook-development/SKILL.md

@@ -533,7 +533,7 @@ All matching hooks run **in parallel**:
 
 Create hooks that activate conditionally by checking for a flag file or configuration:
 
-**Pattern: Flag file activation**
+### Pattern: Flag file activation
 
 ```bash
 #!/bin/bash
@@ -550,7 +550,7 @@ input=$(cat)
 # ... validation logic ...
 ```
 
-**Pattern: Configuration-based activation**
+### Pattern: Configuration-based activation
 
 ```bash
 #!/bin/bash

plugins/plugin-dev/skills/mcp-integration/references/tool-usage.md

@@ -314,7 +314,8 @@ Steps:
 
 ### Batching Requests
 
-**Good: Single query with filters**
+#### Good: Single query with filters
+
 ```markdown
 Steps:
 1. Call mcp__plugin_api_server__search with filters:
@@ -324,7 +325,8 @@ Steps:
 2. Process all results
 ```
 
-**Avoid: Many individual queries**
+#### Avoid: Many individual queries
+
 ```markdown
 Steps:
 1. For each item ID:

plugins/plugin-dev/skills/plugin-settings/SKILL.md

@@ -61,7 +61,7 @@ Contact @team-lead with questions.
 
 ### From Hooks (Bash Scripts)
 
-**Pattern: Check existence and parse frontmatter**
+#### Pattern: Check existence and parse frontmatter
 
 ```bash
 #!/bin/bash

plugins/plugin-dev/skills/skill-development/references/skill-creation-workflow.md

@@ -182,7 +182,7 @@ After testing the skill, users may request improvements. Often this happens righ
 - Pointers to references/examples/scripts
 - Most common use cases
 
-**Keep under 3,000 words, ideally 1,500-2,000 words**
+Keep under 3,000 words, ideally 1,500-2,000 words.
 
 ### What Goes in references/
 
@@ -194,7 +194,7 @@ After testing the skill, users may request improvements. Often this happens righ
 - Edge cases and troubleshooting
 - Extensive examples and walkthroughs
 
-**Each reference file can be large (2,000-5,000+ words)**
+Each reference file can be large (2,000-5,000+ words).
 
 ### What Goes in examples/
 
@@ -205,7 +205,7 @@ After testing the skill, users may request improvements. Often this happens righ
 - Template files
 - Real-world usage examples
 
-**Users can copy and adapt these directly**
+Users can copy and adapt these directly.
 
 ### What Goes in scripts/
 
@@ -216,7 +216,7 @@ After testing the skill, users may request improvements. Often this happens righ
 - Parsing utilities
 - Automation scripts
 
-**Should be executable and documented**
+Should be executable and documented.
 
 ## Writing Style Guide