AGENTS.md

Writing code

Code is the source of truth: before writing anything, read the v1 code for existing helpers, harnesses, and interfaces instead of reinventing them. Prefer verifiers-native task, trace, server, harness, and runtime interfaces over repeated path/import/discovery plumbing in user packages.
Minimal config surface: expose as few knobs as possible, but as many as needed.
Keep tasksets small: a basic taskset fits in a few dozen idiomatic lines — typed data/task/config classes, load(), and decorated scoring on the task. Don't override Taskset.__init__ (implement load()); don't override Harness.__init__ (use setup()).

Always use uv: run code and commands with uv run, never raw python. Make sure uv is installed (docs).
Scaffold environments: create a new taskset/environment with uv run init <name> (uv run init -h lists options like -T/-H), and run evals with uv run eval <taskset>.
Validate TOML first: validate config .toml files before running them.
Don't add dependencies: never add dependencies or optional extras to the top-level pyproject.toml.

Kept intentionally minimal: docs/, skills/, and configs/ are deliberately sparse. Don't touch them unless your change breaks their assumptions.
Docs reflect main, not history: describe the current state of the codebase only — no removed/legacy fields, migration paths, or "this used to be X" anecdotes.

Use bundled skills first: the skills in skills/ cover the core workflows — create-environments (build or migrate a v1 taskset/environment/harness), evaluate-environments (configure and run evals), and brainstorm (ideation and research planning). Reach for them before doing the work by hand.

Prefer e2e tests over unit tests: v1's end-to-end tests are sufficient — extra unit tests clog the repo. Editing existing tests is fine; to check your own work, write a temporary script instead of committing new tests.
Run the contributor checks: run uv run pre-commit install once, then for touched areas uv run ruff check --fix ., uv run pytest tests/, and uv run pre-commit run --all-files (see docs/legacy/development.md).