Switch dapperdata to prettier for config formatting

.github/prompts/template-testing.prompt.md → .agents/skills/template-testing/SKILL.md

@@ -1,4 +1,5 @@
 ---
+name: template-testing
 description: "Comprehensive testing of the cookiecutter template across all configurations."
 ---
 
@@ -39,7 +40,7 @@ make mypy_check  # Type checking
 make ruff_check  # Linting
 ```
 
-Note: Formatting issues (dapperdata, tomlsort, paracelsus) can be auto-fixed with `make chores` and are not critical for validation.
+Note: Formatting issues (prettier, tomlsort, paracelsus) can be auto-fixed with `make chores` and are not critical for validation.
 
 #### Step 3: Verify Results
 
@@ -136,15 +137,13 @@ Standard configurations should produce these results:
 After testing, provide a summary that includes:
 
 1. **Configuration Results**: For each tested configuration
-
    - Configuration name
    - Number of tests run
    - Number of tests passed/failed
    - Code coverage percentage
    - Any errors or warnings
 
 2. **Test Output Analysis**: Key findings from test execution
-
    - Any deprecation warnings
    - Performance issues
    - Coverage gaps in important modules

README.md

@@ -10,7 +10,7 @@ Transform any Python idea into a production-ready project in minutes. This Cooki
 
 ## Why Choose This Template?
 
-- **Modern Development Tools**: Get a fully configured environment with Ruff (formatting/linting), mypy (type checking), pytest (testing), and pre-commit hooks ready to use
+- **Modern Development Tools**: Get a fully configured environment with Ruff (formatting/linting), prettier (YAML/JSON/Markdown formatting), mypy (type checking), pytest (testing), and pre-commit hooks ready to use
 - **Production-Ready Frameworks**: Optional integration with FastAPI (web APIs), Celery (distributed tasks), SQLAlchemy + Alembic (database ORM), and QuasiQueue (multiprocessing)
 - **Professional Infrastructure**: Includes Docker containerization, GitHub Actions CI/CD, Pydantic Settings for configuration, and Makefile automation
 - **Developer-Friendly CLI**: Optional Typer integration for building beautiful command-line interfaces with automatic help and shell completion
@@ -47,6 +47,7 @@ Every project created with this template includes these essential components:
 
 - **[Ruff](https://docs.astral.sh/ruff/)**: Blazingly fast Python linter and formatter (10-100x faster than Black) that replaces multiple tools (Flake8, isort, Black) with a single, zero-configuration solution written in Rust
 - **[mypy](https://mypy.readthedocs.io/en/stable/)**: Industry-standard static type checker that catches type-related bugs before runtime, providing IDE autocompletion and making refactoring safer
+- **[prettier](https://prettier.io/)**: Universal code formatter for YAML, JSON, Markdown, and other config files, running via npx with no Python dependency needed and consistent formatting across all supported file types
 - **[pytest](https://docs.pytest.org/)**: Python's most popular testing framework with powerful fixtures, parametrization, full async/await support, and extensive plugin ecosystem for testing web apps, databases, and more
 - **Coverage reporting**: Comprehensive test coverage tracking with support for multiprocess and distributed applications, ensuring your tests exercise all code paths
 
@@ -153,7 +154,7 @@ Pick and choose the features you need. Unused components are completely removed
 **Comprehensive [GitHub Actions](https://docs.github.com/en/actions)**
 
 - Matrix testing across multiple Python versions (3.10, 3.11, 3.12, 3.13, 3.14) to ensure broad compatibility before release
-- Automated code quality enforcement with Ruff for formatting and linting, mypy for type checking, and pytest for test execution
+- Automated code quality enforcement with Ruff for formatting and linting, prettier for YAML/JSON/Markdown formatting, mypy for type checking, and pytest for test execution
 - Fully automated PyPI publishing triggered by git tags, with automatic changelog generation, version bumping, and release notes from commit messages
 - Container image building and multi-architecture publishing to GitHub Container Registry and Docker Hub, with automatic tagging based on branches and release/tag versions
 - Intelligent dependency updates using Dependabot and [uv](https://pypi.org/project/uv/) lockfile management for fast, reproducible builds and automated PR creation for updates

{{cookiecutter.__package_slug}}/.github/workflows/prettier.yaml

@@ -0,0 +1,14 @@
+name: Configuration File Formatting
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Check Formatting
+        run: npx --yes prettier --check . --log-level warn

{{cookiecutter.__package_slug}}/.prettierignore

@@ -0,0 +1,7 @@
+.venv/
+{{cookiecutter.__package_slug}}.egg-info/
+tmp/
+.*/**/*.md
+{%- if cookiecutter.include_sqlalchemy == "y" %}
+docs/dev/database.md
+{%- endif %}

{{cookiecutter.__package_slug}}/AGENTS.md

@@ -25,7 +25,7 @@ git mv old_path new_path # ALWAYS use git mv for moving or renaming files, never
 ### Testing and Validation
 
 ```bash
-make tests # Run all tests and checks (pytest, ruff, black, mypy, dapperdata, tomlsort)
+make tests # Run all tests and checks (pytest, ruff, black, mypy, prettier, tomlsort)
 make pytest # Run pytest with coverage report
 make pytest_loud # Run pytest with debug logging enabled
 uv run pytest # Run pytest directly with uv, adding any arguments and options needed
@@ -37,17 +37,17 @@ uv run pytest # Run pytest directly with uv, adding any arguments and options ne
 make ruff_check # Check code with ruff linter
 make black_check # Check code formatting with ruff format using the black format
 make mypy_check # Run type checking with mypy
-make dapperdata_check # Check data file formatting
+make prettier_check # Check markdown/json/yaml/etc formatting with prettier
 make tomlsort_check # Check TOML file linting and formatting
 ```
 
 ### Code Formatting (Auto-fix)
 
 ```bash
-make chores # Run all formatting fixes (ruff, black, dapperdata, tomlsort)
+make chores # Run all formatting fixes (ruff, black, prettier, tomlsort)
 make ruff_fixes # Auto-fix ruff issues
 make black_fixes # Auto-format code with ruff using the black format
-make dapperdata_fixes # Auto-format data files
+make prettier_fixes # Auto-format markdown/json/yaml/etc
 make tomlsort_fixes # Auto-format TOML files
 ```
 

{{cookiecutter.__package_slug}}/docs/dev/dependencies.md

@@ -110,7 +110,7 @@ Development dependencies are organized in the `[project.optional-dependencies]`
 - **ruff**: Fast Python linter and formatter (replaces Black, isort, Flake8)
 - **mypy**: Static type checker for catching type-related bugs
 - **build**: PEP 517 build frontend for creating distribution packages
-- **dapperdata**: Data formatting and validation tool
+- **prettier**: Universal code formatter for YAML, JSON, Markdown, and other config files (runs via npx)
 - **glom**: Nested data access and transformation
 - **greenlet**: Lightweight concurrent programming support (required for coverage with async)
 - **toml-sort**: Automatic TOML file sorting for consistency

{{cookiecutter.__package_slug}}/docs/dev/github.md

@@ -37,11 +37,11 @@ The project includes the following GitHub Actions workflows in `.github/workflow
 - **Purpose**: Validates type hints and catches type-related errors
 - **Command**: `make mypy_check`
 
-**dapperdata.yaml** - Data Format Validation
+**prettier.yaml** - Configuration File Formatting
 
 - **Trigger**: Every push and pull request
-- **Purpose**: Validates data file formatting (YAML, JSON, etc.)
-- **Command**: `make dapperdata_check`
+- **Purpose**: Validates markdown/JSON/YAML/config file formatting with prettier
+- **Command**: `make prettier_check`
 
 **tomlsort.yaml** - TOML File Sorting
 

{{cookiecutter.__package_slug}}/docs/dev/makefile.md

@@ -150,7 +150,7 @@ make uv
 
 - Fixes linting issues with Ruff
 - Formats code with Black (via Ruff)
-- Formats data files with dapperdata
+- Formats markdown/JSON/YAML/config files with prettier
 - Sorts TOML files
 {%- if cookiecutter.include_sqlalchemy == "y" %}
 - Updates database schema documentation
@@ -197,21 +197,22 @@ make ruff_fixes
 make black_fixes
 ```
 
-### `make dapperdata_fixes`
+### `make prettier_fixes`
 
-**Purpose**: Format JSON and YAML data files.
+**Purpose**: Format markdown, JSON, YAML, and other config files.
 
 **What it does**:
 
-- Pretty-prints JSON files
 - Formats YAML files consistently
-- Fixes indentation and structure
+- Pretty-prints JSON files
+- Formats markdown files
+- Handles other supported file types (TOML, CSS, etc.)
 
 **Usage**:
 
 ```bash
-# Format data files
-make dapperdata_fixes
+# Format config and data files
+make prettier_fixes
 ```
 
 ### `make tomlsort_fixes`
@@ -243,7 +244,7 @@ make tomlsort_fixes
 3. Checks linting (ruff)
 4. Checks formatting (black)
 5. Runs type checking (mypy)
-6. Checks data file formatting
+6. Checks config/markdown formatting (prettier)
 7. Checks TOML file sorting
 {%- if cookiecutter.include_sqlalchemy == "y" %}
 8. Verifies database schema documentation is up-to-date
@@ -363,20 +364,20 @@ make black_check
 make mypy_check
 ```
 
-### `make dapperdata_check`
+### `make prettier_check`
 
-**Purpose**: Check data file formatting without modifying.
+**Purpose**: Check markdown, JSON, YAML, and config file formatting without modifying.
 
 **What it does**:
 
-- Verifies JSON/YAML files are properly formatted
+- Verifies YAML/JSON/markdown files are properly formatted
 - Exits with error if files need formatting
 
 **Usage**:
 
 ```bash
-# Check data file formatting
-make dapperdata_check
+# Check config and data file formatting
+make prettier_check
 ```
 
 ### `make tomlsort_check`

{{cookiecutter.__package_slug}}/docs/dev/testing.md

@@ -790,7 +790,7 @@ Tests run automatically on every push and pull request via GitHub Actions. The C
 2. **Checks code formatting** with ruff
 3. **Performs type checking** with mypy
 4. **Validates linting rules** with ruff
-5. **Checks data formatting** with dapperdata
+5. **Checks config/markdown formatting** with prettier
 6. **Verifies TOML formatting** with toml-sort
 
 See the [GitHub Actions documentation](./github.md) for more details on CI configuration.

{{cookiecutter.__package_slug}}/makefile

@@ -58,10 +58,10 @@ pre-commit:
 
 {%- if cookiecutter.include_sqlalchemy == "y" %}
 .PHONY: chores
-chores: ruff_fixes black_fixes dapperdata_fixes tomlsort_fixes document_schema
+chores: ruff_fixes black_fixes prettier_fixes tomlsort_fixes document_schema
 {%- else %}
 .PHONY: chores
-chores: ruff_fixes black_fixes dapperdata_fixes tomlsort_fixes
+chores: ruff_fixes black_fixes prettier_fixes tomlsort_fixes
 {%- endif %}
 
 .PHONY: ruff_fixes
@@ -72,9 +72,9 @@ ruff_fixes:
 black_fixes:
 	$(UV) run ruff format .
 
-.PHONY: dapperdata_fixes
-dapperdata_fixes:
-	$(UV) run python -m dapperdata.cli pretty . --no-dry-run
+.PHONY: prettier_fixes
+prettier_fixes:
+	npx --yes prettier --write . --log-level warn
 
 .PHONY: tomlsort_fixes
 tomlsort_fixes:
@@ -86,10 +86,10 @@ tomlsort_fixes:
 
 {%- if cookiecutter.include_sqlalchemy == "y" %}
 .PHONY: tests
-tests: install pytest ruff_check black_check mypy_check dapperdata_check tomlsort_check paracelsus_check
+tests: install pytest ruff_check black_check mypy_check prettier_check tomlsort_check paracelsus_check
 {%- else %}
 .PHONY: tests
-tests: install pytest ruff_check black_check mypy_check dapperdata_check tomlsort_check
+tests: install pytest ruff_check black_check mypy_check prettier_check tomlsort_check
 {%- endif %}
 
 .PHONY: pytest
@@ -112,9 +112,9 @@ black_check:
 mypy_check:
 	$(UV) run mypy ${PACKAGE_SLUG}
 
-.PHONY: dapperdata_check
-dapperdata_check:
-	$(UV) run python -m dapperdata.cli pretty .
+.PHONY: prettier_check
+prettier_check:
+	npx --yes prettier --check . --log-level warn
 
 .PHONY: tomlsort_check
 tomlsort_check:

{{cookiecutter.__package_slug}}/pyproject.toml

@@ -65,7 +65,6 @@ dependencies = [
 [dependency-groups]
 dev = [
   "build",
-  "dapperdata",
   "glom",
   "greenlet",
 {%- if cookiecutter.include_fastapi == "y" %}