[BryanFRD]

Summary

• Add schema/fixture.schema.json with full JSON Schema (draft 2020-12) for fixture definition files
• Covers all fields: meta, config, packages, commits, tags, branches, hooks, generate, expect
• Uses $defs/commit for shared commit structure between top-level and branch commits
• Update README to show $schema usage in example and add schema dir to directory tree

Closes #58

[Copilot]

Pull request overview

Adds a JSON Schema to formalize the fixture definition JSON format, enabling editor autocomplete/validation for consumers, and updates the README to document schema usage.

Changes:

• Added schema/fixture.schema.json (JSON Schema draft 2020-12) describing fixture definition files.
• Documented $schema usage in the README example.
• Updated the README directory tree to include the new schema/ directory.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
schema/fixture.schema.json	Introduces the JSON Schema for fixture definition JSON files.
README.md	Documents how to reference the schema and lists it in the repo structure.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

meta.name and meta.description are validated as non-empty in generator/src/validate.rs (it errors on empty strings), but the schema currently allows empty strings. Consider adding minLength: 1 to both fields so editor validation matches runtime validation.

Suggested change

	"type": "string",
	"description": "Unique identifier for this fixture (used as directory name)."
	},
	"description": {
	"type": "string",
	"type": "string",
	"minLength": 1,
	"description": "Unique identifier for this fixture (used as directory name)."
	},
	"description": {
	"type": "string",
	"minLength": 1,

[Copilot]

config.format is restricted to json|toml|json5, but the generator code explicitly supports unknown formats by falling back to ferrflow.json (see resolve_unknown_format_falls_back_to_json test). With the current schema, definitions that work at runtime (e.g. format: "yaml") will be flagged invalid by editors. Consider removing the enum constraint and instead using examples/description to document the known values, or otherwise allow arbitrary strings.

Suggested change

	"enum": ["json", "toml", "json5"],
	"default": "json",
	"description": "Config file format. Determines the default filename if 'filename' is not set."
	"default": "json",
	"examples": ["json", "toml", "json5"],
	"description": "Config file format. Known values include 'json', 'toml', and 'json5'. Determines the default filename if 'filename' is not set. Unknown values are allowed and fall back to the default 'ferrflow.json' filename behavior."