# TONL v1 fixture assumptions

These fixtures define Mercury Toolbox's Rust-native TONL v1 surface for tests
and examples.

The representation is JSON-backed and line-oriented:

- A document object is written as `key = <JSON value>` per non-empty line.
- Record streams are separated by `---`.
- Lines beginning with `#` are comments.
- Values after `=` must be valid JSON literals, arrays, or objects.
- Non-object root values are represented by the reserved `$ = <JSON value>` key.

This keeps TONL deterministic, streamable, and easy to convert to and from JSON
or JSONL without a Node/TypeScript runtime.