review: code simplification and cleanup

tests/release-fragment-contract.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+tmp="$(mktemp -d)"
+trap 'rm -rf "$tmp"' EXIT
+
+cd "$repo_root"
+FRAG_REPO='sow-tools' \
+FRAG_SHA='abc123' \
+FRAG_ARTIFACT='registry.example/sow/sow-tools:"quoted"' \
+FRAG_URL=$'https://example.invalid/releases\nnext' \
+FRAG_RUN_ID='run-1' \
+FRAG_OUT="$tmp/fragment.json" \
+  ./scripts/emit-release-fragment.sh
+
+jq -e '.repo == "sow-tools" and .artifact == "registry.example/sow/sow-tools:\"quoted\"" and (.publish_url | contains("next"))' \
+  "$tmp/fragment.json" >/dev/null
+
+echo "release-fragment-contract: JSON escapes env values"