# AGENTS.md

Exercise repo: illustrating the transition from DB-backed domain classes
(`DbBase` inheritance) to plain domain objects + DTOs + mappers.
Diagrams: `before-after-dto.mmd`, `after-dto.mmd` (source sketch:
`before-after-dto-sketch.png`).

## Running dotnet

dotnet SDK 10 is installed **via mise** (see `mise.toml`). It is NOT on PATH in
agent/sandbox shells, and SDK 10 additionally fails without
`DOTNET_CLI_HOME` in some shells. Always use the wrappers:

```sh
scripts/dotnet.sh build db-subclass-to-dto.sln
scripts/dotnet.sh test db-subclass-to-dto.sln
scripts/run-tests.sh          # full test suite, from repo root
```

The wrappers cd to the repo root (the test runner must run from the parent
directory of the test project), export `DOTNET_CLI_HOME`, and invoke
`mise exec -- dotnet ...`. Do not call bare `dotnet`.

## Yaks (task management with yx)

Tasks are managed with the `yx` CLI; yaks live in git (event store), snapshot
in `.yaks/` (gitignored). Work one yak at a time:

```sh
yx list                        # all yaks and states
yx show "<yak name>"           # full yak context (the task instructions)
yx start "<yak name>"          # set state to wip
yx done "<yak name>"           # set state to done (only after acceptance
                               # criteria pass and changes are committed)
```

- The yak context in `yx show` is the authoritative task description; follow
  its acceptance criteria before `yx done`.
- Children block their parent: do prerequisites (nested under a yak) first.
- Add new tasks: `yx add "<name>"` (nest with `--under "<parent>"`).
- If yx complains `.yaks is not gitignored`, keep `.yaks` in `.gitignore`.

## Conventions

- Target framework: net10.0 (SDK pinned by mise).
- Tests: xUnit, one `tests/BeforeAfter.Tests/` project.
- No EF Core / SQLite / AutoMapper — the DB layer is a small hand-rolled fake
  (pure managed code, cross-platform).
- Commit per yak with a message referencing the yak.