hello-test — SPEC.md

# SPEC — hello-test

Source brief: `inbox/hello-test.md`.

## Brief

Prove the pipeline moves. Create a Swift package `HelloCore` in this project with one
function `greet(name: String) -> String` returning "Hello, <name>!" and one XCTest
verifying it. Nothing else.

- type: experiment (throwaway; delete after pipeline is proven)
- stack: swift (reason: exercises the Swift lane of verify.sh, the flagship default)

## done_when

- `swift test` passes with >= 1 test in projects/hello-test
- SPEC.md contains this done_when block
- STAGE file contains BUILD

## Status

Current STAGE: BUILD. Package.swift, Sources/HelloCore, and Tests/HelloCoreTests
have been implemented; see UNKNOWNS.md for the blindspot pass that preceded this.