diff --git a/CLAUDE.md b/CLAUDE.md
index b0f9d16..8eaa7b2 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -2,13 +2,17 @@
 
 ## Project Overview
 
-A collection of reusable git hook scripts for automating code quality checks. Main focus: PHP/Laravel (PHPStan, Pint), shell script validation (ShellCheck), Docker linting, and commit message enhancement.
+A collection of reusable git hook scripts for automating code quality checks. Covers JavaScript/TypeScript, Python, PHP/Laravel, CSS, HTML, Markdown, YAML, Docker, and shell scripts.
 
 ## Directory Structure
 
 ```
+css/                        # CSS/SCSS/Less hooks
+├── check_stylelint.sh      # Stylelint for staged files
+└── check_stylelint_all.sh  # Stylelint for entire project
+
 docker/                     # Docker-related hooks
-├── check_hadolint.sh       # Dockerfile linter
+└── check_hadolint.sh       # Dockerfile linter
 
 git/                        # Git workflow hooks
 ├── check_branch_name.sh    # Branch naming convention validator
@@ -16,6 +20,26 @@ git/                        # Git workflow hooks
     ├── add_task_id_in_commit.sh
     └── prepare-commit-description.sh
 
+html/                       # HTML hooks
+├── check_htmlhint.sh       # HTMLHint for staged files
+└── check_htmlhint_all.sh   # HTMLHint for entire project
+
+javascript/                 # JavaScript/TypeScript hooks
+├── check_eslint_all.sh     # ESLint across the project
+├── check_prettier.sh       # Prettier on staged files
+├── check_prettier_all.sh   # Prettier on all TS files
+├── check_tsc_all.sh        # TypeScript type checking
+├── check_vitest.sh         # Vitest runner
+├── check_vitest_all.sh     # Full Vitest suite
+├── check_tests.sh          # Vitest for changed files
+├── check_tests_all.sh      # Full Vitest suite (wrapper)
+├── check_test_coverage.sh  # Vitest with coverage
+└── check_tests_exist.sh    # Test file existence validator
+
+markdown/                   # Markdown hooks
+├── check_markdownlint.sh     # markdownlint for staged files
+└── check_markdownlint_all.sh # markdownlint for entire project
+
 php/                        # PHP/Laravel hooks
 ├── check_phpstan.sh        # PHPStan with progressive error reduction
 ├── find_test.sh            # Unit test coverage validator
@@ -23,6 +47,15 @@ php/                        # PHP/Laravel hooks
 └── laravel/
     └── check_pint.sh       # Laravel Pint code style fixer
 
+python/                     # Python hooks
+├── check_flake8.sh         # Flake8 linting (local)
+├── check_flake8_in_docker.sh # Flake8 (Docker)
+├── check_mypy.sh           # Mypy type checking (local)
+├── check_mypy_in_docker.sh # Mypy (Docker)
+├── check_pytest.sh         # Pytest (local)
+├── check_pytest_in_docker.sh # Pytest (Docker)
+└── find_test.sh            # Service test existence validator
+
 shell/                      # Shell script validation
 └── check_shellcheck.sh     # ShellCheck via Docker
 
@@ -30,10 +63,20 @@ scripts/                    # Local utility scripts
 ├── check_shellcheck.sh     # ShellCheck (local execution)
 └── pre-commit-check.sh     # Pre-commit orchestrator
 
+yml/                        # YAML hooks
+├── check_yamllint.sh       # yamllint for staged files
+└── check_yamllint_all.sh   # yamllint for entire project
+
 tests/                      # Test framework
 ├── run_all.sh              # Run all test suites
 ├── lib/test_helper.bash    # Test utilities and assertions
-└── php/phpstan/            # PHPStan hook tests
+├── css/                    # CSS hook tests
+├── html/                   # HTML hook tests
+├── javascript/             # JavaScript hook tests
+├── markdown/               # Markdown hook tests
+├── php/                    # PHP hook tests
+├── python/                 # Python hook tests
+└── yml/                    # YAML hook tests
 ```
 
 ## Script Conventions
@@ -67,7 +110,13 @@ Every script must start with a description block after the shebang:
 ## Dependencies
 
 - Bash 4.0+, Git, jq
+- Node.js with npx (for JavaScript/TypeScript, CSS, HTML hooks)
+- Python 3, Flake8, Mypy, Pytest (for Python hooks)
 - PHP 8.1+, Composer (for PHPStan/Pint)
+- Stylelint via npx (for CSS hooks)
+- HTMLHint via npx (for HTML hooks)
+- markdownlint-cli (for Markdown hooks)
+- yamllint (for YAML hooks)
 - Docker (optional, for containerized checks)
 - ShellCheck (for shell validation)
 
diff --git a/README.md b/README.md
index c72e616..7098442 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,10 @@ A collection of reusable git hook scripts for automating code quality checks and
 - **JavaScript/TypeScript**: ESLint, Prettier, TypeScript type checking, Vitest test runner, test existence validation
 - **Python**: Flake8 linting, Mypy static analysis, Pytest runner, service test validation (local and Docker modes)
 - **PHP/Laravel**: PHPStan analysis with progressive error reduction, Pint code style fixing, test coverage validation
+- **CSS/SCSS/Less**: Stylelint code style validation
+- **HTML**: HTMLHint linting
+- **Markdown**: markdownlint style validation
+- **YAML**: yamllint style validation
 - **Docker**: Dockerfile linting with Hadolint
 - **Shell**: Script validation with ShellCheck
 - **Git**: Branch naming conventions, automatic task ID injection in commits
@@ -55,6 +59,34 @@ A collection of reusable git hook scripts for automating code quality checks and
 | `php/find_test.sh` | Validates that modified PHP classes have corresponding unit tests. |
 | `php/start_test_in_docker.sh` | Runs PHPUnit tests inside Docker for modified files. |
 
+### CSS / SCSS / Less
+
+| Script | Description |
+|--------|-------------|
+| `css/check_stylelint.sh` | Runs Stylelint on staged CSS/SCSS/Less files passed as arguments. |
+| `css/check_stylelint_all.sh` | Runs Stylelint on all CSS/SCSS/Less files in the project. Used in pre-push hooks. |
+
+### HTML
+
+| Script | Description |
+|--------|-------------|
+| `html/check_htmlhint.sh` | Runs HTMLHint on staged HTML files passed as arguments. |
+| `html/check_htmlhint_all.sh` | Runs HTMLHint on all HTML files in the project. Used in pre-push hooks. |
+
+### Markdown
+
+| Script | Description |
+|--------|-------------|
+| `markdown/check_markdownlint.sh` | Runs markdownlint on staged `.md` files passed as arguments. |
+| `markdown/check_markdownlint_all.sh` | Runs markdownlint on all `.md` files in the project. Used in pre-push hooks. |
+
+### YAML
+
+| Script | Description |
+|--------|-------------|
+| `yml/check_yamllint.sh` | Runs yamllint on staged `.yml`/`.yaml` files passed as arguments. |
+| `yml/check_yamllint_all.sh` | Runs yamllint on all `.yml`/`.yaml` files in the project. Used in pre-push hooks. |
+
 ### Git Workflow
 
 | Script | Description |
@@ -138,6 +170,46 @@ A collection of reusable git hook scripts for automating code quality checks and
 ./php/check_phpstan.sh strict src/Service.php
 ```
 
+### CSS / SCSS / Less
+
+```bash
+# Check staged files
+./css/check_stylelint.sh styles/main.css components/button.scss
+
+# Check all files in the project
+./css/check_stylelint_all.sh
+```
+
+### HTML
+
+```bash
+# Check staged files
+./html/check_htmlhint.sh templates/index.html templates/layout.html
+
+# Check all files in the project
+./html/check_htmlhint_all.sh
+```
+
+### Markdown
+
+```bash
+# Check staged files
+./markdown/check_markdownlint.sh README.md docs/guide.md
+
+# Check all files in the project
+./markdown/check_markdownlint_all.sh
+```
+
+### YAML
+
+```bash
+# Check staged files
+./yml/check_yamllint.sh .github/workflows/ci.yml docker-compose.yml
+
+# Check all files in the project
+./yml/check_yamllint_all.sh
+```
+
 ### Branch Name Validation
 
 ```bash
@@ -188,6 +260,18 @@ bash python/find_test.sh $FILES
 PHP_FILES=$(echo "$FILES" | grep '\.php$' || true)
 [[ -n "$PHP_FILES" ]] && bash php/check_phpstan.sh default $PHP_FILES
 
+# CSS/SCSS/Less
+bash css/check_stylelint.sh $FILES
+
+# HTML
+bash html/check_htmlhint.sh $FILES
+
+# Markdown
+bash markdown/check_markdownlint.sh $FILES
+
+# YAML
+bash yml/check_yamllint.sh $FILES
+
 # Shell
 SH_FILES=$(echo "$FILES" | grep '\.sh$' || true)
 [[ -n "$SH_FILES" ]] && bash scripts/check_shellcheck.sh $SH_FILES
@@ -207,6 +291,14 @@ SH_FILES=$(echo "$FILES" | grep '\.sh$' || true)
 ./tests/python/flake8/run.sh
 ./tests/python/mypy/run.sh
 ./tests/python/find_test/run.sh
+./tests/css/stylelint/run.sh
+./tests/css/stylelint_all/run.sh
+./tests/html/htmlhint/run.sh
+./tests/html/htmlhint_all/run.sh
+./tests/markdown/markdownlint/run.sh
+./tests/markdown/markdownlint_all/run.sh
+./tests/yml/yamllint/run.sh
+./tests/yml/yamllint_all/run.sh
 ```
 
 ## Requirements
@@ -214,9 +306,13 @@ SH_FILES=$(echo "$FILES" | grep '\.sh$' || true)
 - Bash 4.0+
 - Git
 - jq
-- Node.js with npx (for JavaScript/TypeScript hooks)
+- Node.js with npx (for JavaScript/TypeScript, CSS, HTML hooks)
 - Python 3, Flake8, Mypy, Pytest (for Python hooks)
 - PHP 8.1+ with Composer (for PHP hooks)
+- Stylelint (`npm install -g stylelint`) or via `npx`
+- HTMLHint (`npm install -g htmlhint`) or via `npx`
+- markdownlint-cli (`npm install -g markdownlint-cli`)
+- yamllint (`pip install yamllint` or system package)
 - Docker (optional, for Docker-based hooks)
 - ShellCheck (for shell validation)