# Local candidate check

Use `releasekit.Check` to verify a candidate against the current local
repository state:

```go
result, err := releasekit.Check(ctx, releasekit.ReleaseRequest{
	RepositoryDir: "/work/project",
	Product:       "Example",
	Version:       "v1.2.3",
	Validation: releasekit.ValidationSpec{
		Go: releasekit.GoValidationSpec{Race: true, FullVet: true},
	},
	AdditionalChecks: func(ctx context.Context, candidate releasekit.Candidate) error {
		return runProjectChecks(ctx, candidate.RepositoryDir)
	},
})
if err != nil {
	return err
}
fmt.Println(result.Version, result.Commit)
```

The repository must have a clean index and worktree on `main`, and the selected
version must be stable `vMAJOR.MINOR.PATCH`. The committed
`docs/releases/<version>.md` note must have a first Markdown H1 containing the
product name and exact version as complete title elements. No local tag with
that version may already exist.

ReleaseKit runs one `go test -mod=readonly -count=1 ./...` suite with the
available compatible local Go toolchain. Set `Validation.Go.Race` to run that
suite with `-race`; set `Validation.Go.FullVet` to run
`go vet -mod=readonly ./...` after successful tests, with test-time vet disabled
for the suite. Set `Validation.Go.CompileTargets` to compile packages for each
complete target pair after tests and vet. Package compilation uses
`CGO_ENABLED=0`, writes no artifact, and does not execute a target binary; its
failures use the `package-compile` identity and include the target. The zero
values retain the ordinary native test behavior and select no compilation.
Set `Validation.GoFormat` to check committed regular Go files using the Go
formatter built into ReleaseKit. It includes vendor and nested-module source,
ignores symlink blobs and worktree changes, and reports unformatted paths as
`go-format` without rewriting files. Its zero value disables the check; it runs
after tests, selected vet, and package compilation, before `AdditionalChecks`.
ReleaseKit calls `AdditionalChecks` once after shared validation when supplied.
It does not download a different toolchain automatically. If race prerequisites
are unavailable, the `go-test` check fails rather than being skipped; a selected
full-vet failure is reported as `go-vet`. The suite uses the Go host target,
disables workspace and module network access, and ignores ambient `GOFLAGS`,
experiment, and CPU feature overrides. Effective cache and native cgo/C-tool
settings are preserved, including values from Go's persistent environment
file. The check revalidates the branch, commit, and cleanliness after
validation.

A successful check is evidence about the local candidate only. It does not
check whether a remote branch or tag is available and does not create a tag.
The [`check` command](../cli.md) reads the product and optional additional
commands from `releasekit.json`.

## Publishing the source tag

`releasekit.Publish` uses the same request and validation order: the standard
suite runs first, followed by `AdditionalChecks` when supplied. It then performs
authoritative remote checks, annotated-tag creation, and an exact tag push. The
selected remote must publish `main` at the captured commit and must not already
contain the selected version tag. A successful result includes the endpoint and
tag object ID. Publication states distinguish an unattempted push, a tag that
was created locally but not pushed, a successful push, a guard conflict, and an
unresolved push error. See the [publication guide](publish.md) for the complete
workflow.

When a push reports an error, ReleaseKit makes one bounded query for the
authoritative tag. An exact tag object match confirms success. An absent tag is
reported as `not_published`, a different object as `conflict`, and an unreadable
query as `unknown`. The local annotated tag is retained in every case; an
`unknown` result is neither success nor proof that the remote lacks the tag.