feat: characterized the existing use cases as a baseline; every repo fake behaves like the real ones and can be told to fail, every use case is covered; gremlins runs clean on useCases

docs/development.md

@@ -4,7 +4,7 @@
 
 | Tool                          | Version                    | Install                                                  |
 |-------------------------------|----------------------------|----------------------------------------------------------|
-| [Go](https://go.dev/dl/)      | 1.25+ (see `go.mod`)       |                                                          |
+| [Go](https://go.dev/dl/)      | 1.27+ (see `go.mod`)       |                                                          |
 | [Node.js](https://nodejs.org) | 20.19+ or 22.12+ (22 LTS recommended) | `nvm install 22` — Vite and vue-tsc run on Node |
 | [Bun](https://bun.sh) (package manager and script runner) | 1.x | `powershell -c "irm bun.sh/install.ps1 \| iex"` or `curl -fsSL https://bun.sh/install \| bash` |
 | [Task](https://taskfile.dev)  | 3.43+                      | `go install github.com/go-task/task/v3/cmd/task@latest`  |