chore: prepare release v0.3.1 (#194)

## Summary

Hotfix release v0.3.1 addressing issues discovered immediately after
v0.3.0:

- **[BANG] placeholder regression** - PR #192 introduced dynamic context
injection documentation with literal `!` backtick patterns, causing
shell execution errors during skill loading
- **Missing documentation updates** - Skill counts and LSP Integration
entries were not updated in CONTRIBUTING.md and README.md

## Changes

### Fixed
- Replace `!` with `[BANG]` in skill-development dynamic context
examples

### Documentation  
- Update skill counts from 8 to 9 in CONTRIBUTING.md and README.md
- Add LSP Integration to README skills table
- Add 0.3.x to SECURITY.md supported versions

### Version Bump
- 0.3.0 → 0.3.1 in plugin.json, marketplace.json, CLAUDE.md
- Updated CHANGELOG.md with release notes

## Checklist

- [x] Version updated in plugin.json, marketplace.json, CLAUDE.md
- [x] CHANGELOG.md updated with release notes
- [x] Markdownlint passes
- [x] Skill loads without shell execution errors

## Test Plan

- [x] Verified `skill-development` skill loads without `!` backtick
errors
- [x] Confirmed all `[BANG]` placeholders are in place via `rg '!\`'
plugins/plugin-dev/skills/`

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

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: sjnims

.claude-plugin/marketplace.json

@@ -6,13 +6,13 @@
   },
   "metadata": {
     "description": "Unofficial plugin-dev plugin marketplace for plugin-dev Claude Code plugin - the plugin itself was initially created by Daisy Hollman at Anthropic.",
-    "version": "0.3.0"
+    "version": "0.3.1"
   },
   "plugins": [
     {
       "name": "plugin-dev",
       "description": "Comprehensive toolkit for developing Claude Code plugins. Includes 9 expert skills covering hooks, MCP integration, LSP servers, commands, agents, marketplaces, and best practices. AI-assisted plugin creation and validation.",
-      "version": "0.3.0",
+      "version": "0.3.1",
       "author": {
         "name": "Daisy Hollman",
         "url": "https://github.com/anthropics/claude-code/",

CHANGELOG.md

@@ -7,6 +7,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.1] - 2026-01-24
+
+### Fixed
+
+- **Replace `!` with `[BANG]` in skill-development** - Fixed regression from #192 where dynamic context injection examples used literal `!` backtick patterns, causing shell execution errors during skill loading
+
+### Documentation
+
+- **Update skill counts for LSP integration** - Updated CONTRIBUTING.md and README.md to reflect 9 skills (was 8)
+- **Add LSP Integration to README skills table** - Added missing entry for LSP skill triggers
+- **Add 0.3.x to SECURITY.md** - Added current version to supported versions table
+
 ## [0.3.0] - 2026-01-24
 
 ### Changed
@@ -207,7 +219,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Based on original plugin by Daisy Hollman at Anthropic
 - Expanded with enhanced skills, additional utilities, and CI/CD infrastructure
 
-[Unreleased]: https://github.com/sjnims/plugin-dev/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/sjnims/plugin-dev/compare/v0.3.1...HEAD
+[0.3.1]: https://github.com/sjnims/plugin-dev/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/sjnims/plugin-dev/compare/v0.2.1...v0.3.0
 [0.2.1]: https://github.com/sjnims/plugin-dev/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/sjnims/plugin-dev/compare/v0.1.0...v0.2.0

CLAUDE.md

@@ -6,7 +6,7 @@ Guidance for Claude Code working in this repository.
 
 Plugin marketplace containing the **plugin-dev** plugin - a toolkit for developing Claude Code plugins. Provides 9 skills, 3 agents, 3 slash commands.
 
-**Version**: v0.3.0 | [CHANGELOG.md](CHANGELOG.md)
+**Version**: v0.3.1 | [CHANGELOG.md](CHANGELOG.md)
 
 ## MCP Tool Requirements (CRITICAL)
 

CONTRIBUTING.md

@@ -49,12 +49,12 @@ Before contributing, ensure you have:
    ```
    plugins/plugin-dev/
    ├── commands/      # 3 slash commands
-   ├── skills/        # 8 skills
+   ├── skills/        # 9 skills
    └── agents/        # 3 specialized agents
    ```
 
 3. **Understand the plugin components**:
-   - 8 skills for different plugin development aspects
+   - 9 skills for different plugin development aspects
    - 3 agents for validation and generation
    - 3 slash commands: `/plugin-dev:start` (entry point), `/plugin-dev:create-plugin`, `/plugin-dev:create-marketplace`
 

README.md

@@ -33,7 +33,7 @@ A comprehensive toolkit for developing Claude Code plugins with expert guidance
 
 ## Overview
 
-The plugin-dev toolkit provides **8 specialized skills**, **3 validation agents**, and **3 slash commands** to help you build high-quality Claude Code plugins:
+The plugin-dev toolkit provides **9 specialized skills**, **3 validation agents**, and **3 slash commands** to help you build high-quality Claude Code plugins:
 
 - **Skills** provide domain expertise loaded on-demand via trigger phrases
 - **Agents** automate validation and generation tasks
@@ -118,6 +118,7 @@ Skills load automatically when you ask relevant questions. Each skill includes c
 | ------------------------- | --------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- |
 | **Hook Development**      | `create a hook`, `PreToolUse hook`, `validate tool use`, `prompt-based hooks`, `block dangerous commands` | Event-driven automation, operation validation, policy enforcement   |
 | **MCP Integration**       | `add MCP server`, `integrate MCP`, `.mcp.json`, `Model Context Protocol`, `stdio/SSE server`              | External service integration, API connections, database access      |
+| **LSP Integration**       | `add LSP server`, `configure language server`, `set up LSP`, `code intelligence`, `pyright-lsp`           | Language server integration, code navigation, type information      |
 | **Plugin Structure**      | `plugin structure`, `plugin.json`, `auto-discovery`, `component organization`                             | Starting new plugins, organizing components, manifest configuration |
 | **Plugin Settings**       | `plugin settings`, `.local.md files`, `YAML frontmatter`, `per-project settings`                          | Configuration storage, user preferences, per-project state          |
 | **Command Development**   | `create a slash command`, `command frontmatter`, `command arguments`                                      | Slash commands, argument handling, command organization             |

SECURITY.md

@@ -6,6 +6,7 @@ We release patches for security vulnerabilities for the following versions:
 
 | Version | Supported          |
 | ------- | ------------------ |
+| 0.3.x   | :white_check_mark: |
 | 0.2.x   | :white_check_mark: |
 | 0.1.x   | :white_check_mark: |
 

plugins/plugin-dev/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "plugin-dev",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "Comprehensive toolkit for developing Claude Code plugins. Includes 9 expert skills covering hooks, MCP integration, LSP servers, commands, agents, marketplaces, and best practices. AI-assisted plugin creation and validation.",
   "author": {
     "name": "Daisy Hollman",

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

@@ -228,13 +228,13 @@ Execute commands to inject their output into skill context using backtick syntax
 ## Current Project Status
 
 The git status is:
-!`git status --short`
+[BANG]`git status --short`
 
 Recent commits:
-!`git log --oneline -5`
+[BANG]`git log --oneline -5`
 ```
 
-**Syntax:** `` !`command` ``
+**Syntax:** `` [BANG]`command` ``
 
 **Use cases:**