Add ofrak-developer Claude skill

claude/Makefile

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+.PHONY: install uninstall clean
+
+SKILL_NAME := ofrak-developer
+SKILL_DIR := $(CURDIR)/$(SKILL_NAME)
+CLAUDE_SKILLS_DIR := $(HOME)/.claude/skills
+INSTALL_PATH := $(CLAUDE_SKILLS_DIR)/$(SKILL_NAME)
+
+install:
+	@echo "Installing $(SKILL_NAME) skill..."
+	@mkdir -p $(CLAUDE_SKILLS_DIR)
+	@ln -sf $(SKILL_DIR) $(INSTALL_PATH)
+	@echo "✓ Skill installed at $(INSTALL_PATH)"
+
+uninstall:
+	@echo "Uninstalling $(SKILL_NAME) skill..."
+	@rm -f $(INSTALL_PATH)
+	@echo "✓ Skill uninstalled"
+
+package:
+	@echo "Packaging $(SKILL_NAME) skill..."
+	@zip -r $(SKILL_NAME).zip $(SKILL_DIR)
+	@echo "✓ Skill packaged at $(SKILL_NAME).zip"
+
+clean: uninstall

claude/README.md

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+# OFRAK Developer Skill for Claude Code
+
+A Claude Code skill for OFRAK contributors and developers. This skill provides guidance for writing OFRAK scripts, creating/modifying OFRAK components, adding tests, fixing bugs, and contributing to OFRAK internals while maintaining 100% code coverage.
+
+## Overview
+
+This skill enables Claude Code to:
+- Write OFRAK scripts and components following best practices
+- Create comprehensive tests with 100% code coverage
+- Develop and modify OFRAK internals
+- Debug and fix OFRAK-related issues
+- Follow OFRAK coding standards and conventions
+
+## Prerequisites
+
+- Claude Code
+
+## Installation
+
+### Quick Install
+
+```bash
+# Install the skill
+make install
+```
+
+This will create a symlink from `~/.claude/skills/ofrak-developer` to the skill directory.
+
+### Manual Installation
+
+If you prefer to install manually:
+
+```bash
+mkdir -p ~/.claude/skills
+ln -sf $(pwd)/ofrak-developer ~/.claude/skills/ofrak-developer
+```
+
+### Packaging
+
+```bash
+make package
+```
+This will create `ofrak-developer.zip`, which can be installed in the Claude Code desktop app.
+
+## Usage
+
+Once installed, the skill is automatically available in Claude Code when working on OFRAK-related projects.
+
+### Activating the Skill
+
+The skill activates automatically when you ask Claude Code to work on OFRAK development tasks, such as creating components, adding tests, or modifying OFRAK internals.
+
+### Common Use Cases
+
+#### 1. Creating a New OFRAK Component
+
+```
+Create a new OFRAK unpacker component for XYZ format
+```
+
+The skill will:
+- Generate the component following OFRAK patterns
+- Create comprehensive tests
+- Ensure proper type annotations
+- Follow OFRAK coding standards
+
+#### 2. Adding Tests
+
+```
+Add tests for the ExampleAnalyzer component
+```
+
+The skill will:
+- Create test fixtures
+- Write unit tests with 100% coverage
+- Follow OFRAK testing conventions
+- Use proper mocking and assertions
+
+#### 3. Fixing Bugs
+
+```
+Fix the bug in the ELF unpacker where sections are not properly aligned
+```
+
+The skill will:
+- Analyze the issue
+- Implement the fix
+- Add regression tests
+- Maintain code coverage
+
+#### 4. Writing OFRAK Scripts
+
+```
+Write a script to unpack and analyze all embedded resources in this firmware
+```
+
+The skill will:
+- Use OFRAK APIs correctly
+- Follow best practices
+- Add proper error handling
+- Include documentation
+
+## What Makes This Different from the General OFRAK Skill?
+
+This skill is specifically for **OFRAK contributors and developers**. It:
+- Knows OFRAK internals and architecture
+- Enforces 100% code coverage requirements
+- Follows OFRAK contribution guidelines
+- Uses OFRAK development patterns
+- Understands the OFRAK codebase structure
+
+For **using** OFRAK (not developing it), see the general `ofrak-user` skill.
+
+## Skill Features
+
+- ✅ Component development guidance
+- ✅ Test generation with full coverage
+- ✅ Code review against OFRAK standards
+- ✅ Bug fixing with regression tests
+- ✅ Documentation generation
+- ✅ Type annotation enforcement
+
+## Uninstalling
+
+To remove the skill:
+
+```bash
+make uninstall
+```
+
+Or manually:
+
+```bash
+rm ~/.claude/skills/ofrak-developer
+```
+
+## Feedback
+
+We want your feedback! Please open an issue on [OFRAK Github](https://github.com/redballoonsecurity/ofrak/issues).