cdd-tooling 0.1.2

Reference implementation of Contract-Driven Development tooling

CDD Tooling

Reference implementation of Contract-Driven Development tooling.

Implements CDD Spec 1.1.5

Installation

# Via pip
pip install cdd-tooling

# With PDF analysis support
pip install cdd-tooling[pdf]

# Via pipx (recommended for CLI use)
pipx install cdd-tooling[pdf]

# From source (editable)
git clone https://github.com/thegdyne/cdd-tooling.git
cd cdd-tooling
pip install -e ".[dev,pdf]"

Quick Start

# Analyze a reference artifact
cdd analyze reference.pdf -o analysis/baseline/

# Write contracts grounded in the analysis
# ... edit contracts/project.yaml ...

# Verify paths resolve
cdd paths contracts/

# Validate contracts
cdd lint contracts/

# Run a single contract in isolation
cdd isolate contracts/feature.yaml

# Run all tests
cdd test contracts/

# Compare output to baseline
cdd analyze output.pdf -o analysis/output/
cdd compare analysis/baseline/ analysis/output/

Commands

Command	Description
cdd spec --version	Show spec/tool version
cdd paths <contracts/>	Verify file paths in contracts resolve
cdd analyze <file> -o <dir>	Extract baseline from PDF/HTML/source
cdd compare <baseline> <output>	Compare two analyses
cdd lint <contracts/>	Validate contract schema + coverage
cdd test <contracts/>	Run contract tests
cdd isolate <contract>	Run single contract in isolated workspace
cdd coverage <contracts/>	Requirement coverage report

Paths

# Verify all file paths in contracts resolve correctly
cdd paths contracts/

# Single contract
cdd paths contracts/feature.yaml

# JSON output
cdd paths contracts/ --json

Pre-gate check that catches path errors before running tests. Extracts paths from files: fields and shell command arguments, verifies they resolve relative to the contract directory.

Analyze

# PDF analysis (requires [pdf] extra)
cdd analyze form.pdf -o analysis/

# HTML analysis
cdd analyze wireframe.html -o analysis/

# Source reference (Python, JS, SuperCollider, etc.)
cdd analyze src/gui/window.py -o analysis/baseline/

# Output varies by type:
#   PDF/HTML: structure.json, elements.md, layout.md
#   Source:   source.<ext>, structure.json, PATTERNS.md, elements.md

Source Reference Handler

For readable source files, captures a frozen snapshot for reference-based development:

cdd analyze src/existing_module.py -o analysis/baseline/

Creates:

analysis/baseline/
├── source.py          # Frozen snapshot of reference
├── structure.json     # Metadata (hash, timestamp, lines)
├── PATTERNS.md        # Pattern template (fill in)
└── elements.md        # Summary

Supported types: .py, .js, .ts, .jsx, .tsx, .scd, .sc, .yaml, .json, .sh, .md, .css, .sql, .rs, .go, .rb, .lua, .c, .cpp, .java, .swift, .kt

Workflow:

1. Analyze existing code: cdd analyze reference.py -o analysis/baseline/
2. Fill in PATTERNS.md with patterns to preserve
3. Write contract based on documented patterns
4. Implement against contract

Compare

# Compare baseline to output (PDF, HTML, or source)
cdd compare analysis/baseline/ analysis/output/

# PDF/HTML: Shows exact deviations
#   ✗ Element spacing: baseline 15pt, output 12pt (deviation: 3pt)
#   ✓ Field dimensions: match within tolerance

# Source: Hash-based comparison
#   ✓ Files are identical
#   ✗ Files differ - use contracts to verify structural requirements

# JSON output for CI
cdd compare analysis/baseline/ analysis/output/ --json

Lint

# Basic validation
cdd lint contracts/

# Strict mode (warnings become errors)
cdd lint contracts/ --strict

# JSON output for CI
cdd lint contracts/ --json

Test

# Run all tests
cdd test contracts/

# With variables
cdd test contracts/ --var target=my_component

# Filter by test ID
cdd test contracts/ --only T001

# JSON output
cdd test contracts/ --json

Isolate

Run a single contract in a clean, isolated workspace. Solves the problem of cdd test running all contracts in a directory.

# Run single contract in isolation
cdd isolate contracts/feature.yaml

# Verbose output (show setup steps)
cdd isolate contracts/feature.yaml -v

# Keep work directory after run (for debugging)
cdd isolate contracts/feature.yaml --keep

# Keep work directory only on failure
cdd isolate contracts/feature.yaml --keep-on-fail

# Preview without running (dry run)
cdd isolate contracts/feature.yaml --dry-run

# Only run path verification
cdd isolate contracts/feature.yaml --paths-only

# Custom work directory
cdd isolate contracts/feature.yaml -w /tmp/my-test

How it works:

1. Auto-detects project root (looks for .cdd/, .git/, or src/ + contracts/)
2. Creates temporary workspace in /tmp/cdd-isolate-<hash>-<pid>/
3. Copies only the specified contract
4. Symlinks required source directories
5. Runs cdd paths then cdd test
6. Cleans up (unless --keep)

Exit codes:

Code	Meaning
0	Paths and tests passed
1	Test failure
2	Path verification failed
3	Contract parse error
4	Project root not found
5	Invalid source path

Coverage

# Show requirement coverage
cdd coverage contracts/

# Fail if uncovered requirements exist
cdd coverage contracts/ --strict

Executors

Executor	Status	Actions	Use Case
python	✅ Full	call, call_n	Python functions
shell	✅ Full	shell	CLI tools, scripts
static	⚠️ Partial	(file assertions)	Regex/content checks
sclang	⚠️ Stub	render_nrt	SuperCollider audio

Note: The sclang executor currently returns "not_implemented". Full NRT rendering support is planned for Phase 3.

Known Issues

Issue	Status	Workaround
cdd test file.yaml runs all contracts in directory	Fixed	Use cdd isolate or --only T001
Static executor $.file.content returns null	Open	Use shell executor with grep instead

Spec Compatibility

This tooling implements CDD Spec version 1.1.5.

Tooling Version	Spec Version	Status
0.1.x	1.1.x	Current

The cdd_spec field in your contracts declares which spec version you're targeting. Tooling validates compatibility at runtime.

Documentation

• CDD Spec — The methodology and normative specification
• CHANGELOG.md — Tooling version history
• ROADMAP.md — Implementation status and future plans
• CDD_ANALYSIS_AND_IMPROVEMENTS.md — Detailed implementation notes

Development

# Clone
git clone https://github.com/thegdyne/cdd-tooling.git
cd cdd-tooling

# Install in dev mode
pip install -e ".[dev,pdf]"

# Run tests
pytest

# Lint
ruff check src/

License

MIT