# tristack.jsonc (/docs/tristack-config)



## What is it? [#what-is-it]

`tristack.jsonc` is a small config file written to your project root when you create a project. It captures the stack choices you selected (language, framework, frontend, ORM, migrations, database, package manager, addons) and the command that reproduces them.

Where: `./tristack.jsonc`

## Format [#format]

The file is JSONC (JSON with comments) and mirrors the resolved `ProjectConfig`:

```jsonc
// TriStack configuration for this project.
{
  "version": "0.1.0",
  "createdAt": "2026-01-01T00:00:00.000Z",
  "reproducibleCommand": "uvx tristack my-api --language python --framework fastapi --frontend none --orm sqlmodel --migrations alembic --database sqlite --package-manager uv --addons docker ruff pytest --git --install",
  "language": "python",
  "framework": "fastapi",
  "frontend": "none",
  "orm": "sqlmodel",
  "migrations": "alembic",
  "database": "sqlite",
  "packageManager": "uv",
  "addons": ["docker", "ruff", "pytest"],
}
```

Notes:

* Values mirror what you selected during project creation
* `version` is the CLI version used to create the project
* `createdAt` is an ISO timestamp of when the project was scaffolded
* `reproducibleCommand` is the exact non-interactive command that reproduces this stack (prefixed with `uvx tristack` for Python stacks and `tristack` for Go/Rust stacks)
* The JSONC format lets future versions add comments without breaking parsers

## Safe to delete [#safe-to-delete]

It's safe to delete for normal development — the generated code is the source of truth. Its main purpose today is bookkeeping: knowing what stack a project uses and how to reproduce it. Keeping it costs nothing and gives editors and tooling a stable record of the project's configuration.

See also: the [Agent Workflows](/docs/cli/agent-workflows) page for the JSON-first input shape that validates against this config.