feat: publish Gamertan Tend preview source

Sanitized root snapshot from private source commit a72903c63e1753f9e6ffbf40453c0830bdfc05c5 and tree 295641e67eef5979da76746d8ae271249568263e. Private development history and workflows are excluded by the exact allowlist. AI-assisted: OpenAI Codex helped implement, test, and audit this preview. Signed-off-by: Cole Speelman <crspeelman@gmail.com>
2026-08-14 14:01:02 -04:00
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+# 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.