chore: initial backup of Claude Code configuration

Includes: CLAUDE.md, settings.json, agents, commands, rules, skills,
hooks, contexts, evals, get-shit-done, plugin configs (installed list
and marketplace sources). Excludes credentials, runtime caches,
telemetry, session data, and plugin binary cache.

rules/README.md

@@ -0,0 +1,103 @@
+# Rules
+## Structure
+
+Rules are organized into a **common** layer plus **language-specific** directories:
+
+```
+rules/
+├── common/          # Language-agnostic principles (always install)
+│   ├── coding-style.md
+│   ├── git-workflow.md
+│   ├── testing.md
+│   ├── performance.md
+│   ├── patterns.md
+│   ├── hooks.md
+│   ├── agents.md
+│   └── security.md
+├── typescript/      # TypeScript/JavaScript specific
+├── python/          # Python specific
+├── golang/          # Go specific
+└── swift/           # Swift specific
+```
+
+- **common/** contains universal principles — no language-specific code examples.
+- **Language directories** extend the common rules with framework-specific patterns, tools, and code examples. Each file references its common counterpart.
+
+## Installation
+
+### Option 1: Install Script (Recommended)
+
+```bash
+# Install common + one or more language-specific rule sets
+./install.sh typescript
+./install.sh python
+./install.sh golang
+./install.sh swift
+
+# Install multiple languages at once
+./install.sh typescript python
+```
+
+### Option 2: Manual Installation
+
+> **Important:** Copy entire directories — do NOT flatten with `/*`.
+> Common and language-specific directories contain files with the same names.
+> Flattening them into one directory causes language-specific files to overwrite
+> common rules, and breaks the relative `../common/` references used by
+> language-specific files.
+
+```bash
+# Install common rules (required for all projects)
+cp -r rules/common ~/.claude/rules/common
+
+# Install language-specific rules based on your project's tech stack
+cp -r rules/typescript ~/.claude/rules/typescript
+cp -r rules/python ~/.claude/rules/python
+cp -r rules/golang ~/.claude/rules/golang
+cp -r rules/swift ~/.claude/rules/swift
+
+# Attention ! ! ! Configure according to your actual project requirements; the configuration here is for reference only.
+```
+
+## Rules vs Skills
+
+- **Rules** define standards, conventions, and checklists that apply broadly (e.g., "80% test coverage", "no hardcoded secrets").
+- **Skills** (`skills/` directory) provide deep, actionable reference material for specific tasks (e.g., `python-patterns`, `golang-testing`).
+
+Language-specific rule files reference relevant skills where appropriate. Rules tell you *what* to do; skills tell you *how* to do it.
+
+## Adding a New Language
+
+To add support for a new language (e.g., `rust/`):
+
+1. Create a `rules/rust/` directory
+2. Add files that extend the common rules:
+   - `coding-style.md` — formatting tools, idioms, error handling patterns
+   - `testing.md` — test framework, coverage tools, test organization
+   - `patterns.md` — language-specific design patterns
+   - `hooks.md` — PostToolUse hooks for formatters, linters, type checkers
+   - `security.md` — secret management, security scanning tools
+3. Each file should start with:
+   ```
+   > This file extends [common/xxx.md](../common/xxx.md) with <Language> specific content.
+   ```
+4. Reference existing skills if available, or create new ones under `skills/`.
+
+## Rule Priority
+
+When language-specific rules and common rules conflict, **language-specific rules take precedence** (specific overrides general). This follows the standard layered configuration pattern (similar to CSS specificity or `.gitignore` precedence).
+
+- `rules/common/` defines universal defaults applicable to all projects.
+- `rules/golang/`, `rules/python/`, `rules/typescript/`, etc. override those defaults where language idioms differ.
+
+### Example
+
+`common/coding-style.md` recommends immutability as a default principle. A language-specific `golang/coding-style.md` can override this:
+
+> Idiomatic Go uses pointer receivers for struct mutation — see [common/coding-style.md](../common/coding-style.md) for the general principle, but Go-idiomatic mutation is preferred here.
+
+### Common rules with override notes
+
+Rules in `rules/common/` that may be overridden by language-specific files are marked with:
+
+> **Language note**: This rule may be overridden by language-specific rules for languages where this pattern is not idiomatic.