# Gamertan Tend

Tend is an opinionated release and deployment tool for small Go services on
Linux, systemd, and Caddy. It packages a clean pushed commit, records exact
build provenance, activates a health-checked candidate, and keeps rollback
state explicit.

The first preview deliberately supports two quiet deployment shapes:

- Caddy-switched blue/green services.
- A singleton service with an isolated transient candidate check.

It does not manage databases, migrations, containers, Kubernetes, or arbitrary
shell hooks. Application-specific data activation remains application-specific.

## Commands

```text
tend check    --config tend.json
tend package  --config tend.json --version v0.1.0-preview.1 --out dist
tend deploy   --config /etc/example/tend.json --artifact FILE --sha256 HEX --approve-sha256 HEX
tend status   --config /etc/example/tend.json
tend rollback --config /etc/example/tend.json
tend prune    --config /etc/example/tend.json --keep 3 [--apply]
```

`deploy`, `rollback`, and applied pruning are target-host operations. Transfer
credentials and production configuration stay outside source repositories.
Dry-run and digest approval are intentional friction.

The first public preview has completed maintenance releases and explicit
rollback/reactivation for both Gamertan and the Sandwich Hime website using one
reviewed Tend candidate. See the dated
[dogfood evidence](docs/DOGFOOD_EVIDENCE.md) for exact scope and limitations.
The canonical public repository begins with a sanitized root snapshot rather
than the private development history.

## Licensing

Tend and its release machinery are AGPL-3.0-only. Reusable example
configuration and service templates under `examples/` are 0BSD.