docs(plugin-dev): identity & ownership — author, fork attribution, CHANGELOG (#46)

* docs(plugin-dev): identity & ownership — author, fork attribution, CHANGELOG

- Replace upstream author (Daisy Hollman) with Nuno Salvação in README.md
- Add fork attribution section referencing anthropics/claude-plugins-official
- Update Contributing section to point to nsalvacao-claude-code-plugins repo
- Create CHANGELOG.md documenting v1.0.0 changes vs upstream baseline
- Fix two pre-existing MD012 (multiple blank lines) markdownlint errors

Roadmap: v1.1 — Identity & Ownership (all 3 items done)

Generated by Nuno Salvação

Co-Authored-By: Nexo <nexo.modeling@gmail.com>

* fix(plugin-dev): align README version with CHANGELOG and marketplace.json

Version section showed 0.1.0 (upstream baseline) after introducing CHANGELOG.md
which starts at 1.0.0. Update to 1.0.0 and reference CHANGELOG for details.

Addresses Gemini review comment on PR #46.

Generated by Nuno Salvação

Co-Authored-By: Nexo <nexo.modeling@gmail.com>

---------

Co-authored-by: Nexo <nexo.modeling@gmail.com>

Author: nsalvacao

plugins/plugin-dev/CHANGELOG.md

@@ -0,0 +1,41 @@
+# CHANGELOG — plugin-dev
+
+This file tracks all notable changes made in this fork relative to the upstream source.
+
+Upstream: [anthropics/claude-plugins-official](https://github.com/anthropics/claude-plugins-official)
+Fork maintained by: Nuno Salvação
+
+---
+
+## [1.0.0] — 2026-03-12
+
+### Added
+
+- Registered `plugin-dev` as a marketplace plugin in `.claude-plugin/marketplace.json` (v1.0.0).
+- `plugin-validation.yml` CI now includes `plugin-dev` in README and marketplace sync checks.
+
+### Fixed
+
+- `validate-hook-schema.sh`: arithmetic bug replaced (`((n++))` → `n=$((n+1))`) — prevents
+  premature exit under `set -e` when the counter starts at 0.
+- `validate-hook-schema.sh`: added wrapper format detection and unwrap support — the canonical
+  `{"hooks":{...}}` wrapper format is now accepted and validated correctly.
+- `hooks/hooks.json` in all 6 plugins: migrated from direct format to wrapper format
+  (`{"hooks":{"EventName":[...]}}`) as required by the Claude Code runtime.
+- `hook-development/SKILL.md`: corrected canonical `hooks.json` format documentation from
+  direct format to wrapper format throughout.
+- `hook-development/references/migration.md`: updated all hook configuration examples to use
+  the correct wrapper format.
+
+---
+
+## [Upstream Baseline]
+
+Content inherited from `anthropics/claude-plugins-official` at fork point (2026-03-12):
+
+- 7 skills: `hook-development`, `mcp-integration`, `plugin-structure`, `plugin-settings`,
+  `command-development`, `agent-development`, `skill-development`
+- 3 agents: `agent-creator`, `plugin-validator`, `skill-reviewer`
+- 1 command: `create-plugin`
+- Validation scripts: `validate-hook-schema.sh`, `validate-agent.sh`, `validate-settings.sh`,
+  `parse-frontmatter.sh`, `test-hook.sh`, `hook-linter.sh`

plugins/plugin-dev/README.md

@@ -1,5 +1,7 @@
 # Plugin Development Toolkit
 
+An independent fork of [anthropics/claude-plugins-official](https://github.com/anthropics/claude-plugins-official), maintained by Nuno Salvação with improvements to validation tooling, canonical formats, and documentation.
+
 A comprehensive toolkit for developing Claude Code plugins with expert guidance on hooks, MCP integration, plugin structure, and marketplace publishing.
 
 ## Overview
@@ -192,7 +194,6 @@ 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 +224,6 @@ 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:
@@ -378,20 +378,26 @@ All skills emphasize:
 
 ## Contributing
 
-This plugin is part of the claude-code-marketplace. To contribute improvements:
+This plugin is part of [nsalvacao-claude-code-plugins](https://github.com/nsalvacao/nsalvacao-claude-code-plugins). To contribute improvements:
 
-1. Fork the marketplace repository
-2. Make changes to plugin-dev/
+1. Fork the repository
+2. Make changes to `plugins/plugin-dev/`
 3. Test locally with `cc --plugin-dir`
-4. Create PR following marketplace-publishing guidelines
+4. Create a PR following the repository's contribution guidelines
 
 ## Version
 
-0.1.0 - Initial release with seven comprehensive skills and three validation agents
+1.0.0 - Forked from upstream. See CHANGELOG.md for details.
 
 ## Author
 
-Daisy Hollman (daisy@anthropic.com)
+Nuno Salvação
+
+## Fork Attribution
+
+This plugin is an independent fork of [anthropics/claude-plugins-official](https://github.com/anthropics/claude-plugins-official).
+Original work by Daisy Hollman (daisy@anthropic.com) and the Anthropic team.
+See [CHANGELOG.md](./CHANGELOG.md) for a full list of changes made in this fork.
 
 ## License