Project Layout 
Keep tests close to your codebase while remaining portable and CI‑ready.
Recommended structure
your-project/
├── .catalyst/
│   ├── tests.toml            # default test suite
│   └── data/                 # request bodies and fixtures
│       ├── create-user.json
│       └── payloads/
├── .env.local                # local env vars (optional)
└── ...Conventions
- Default file: 
.catalyst/tests.toml(override with--file). - Relative file paths resolve from the test file directory.
 - Use 
data/for request bodies; preferbody_filefor large payloads. - Keep secrets in env vars; reference with 
$. 
Multiple suites
- Create additional files: 
.catalyst/staging.toml,.catalyst/perf.toml. - Select with 
--file .catalyst/staging.toml.