[POC] Add scriptc-pm (spm): augment pnpm installs with verified upstream TypeScript (POC)

.gitignore

@@ -13,6 +13,8 @@ node_modules/
 !tests/fixtures/npm/cases/*/node_modules/
 !tests/library-mode/*/node_modules/
 !tests/fixtures/provenance/node_modules/
+!tests/fixtures/source-overlays/project/node_modules/
+!tests/fixtures/source-overlays/project/node_modules/.pnpm/*/node_modules/
 !tests/fixtures/fetch/node_modules/
 !tests/fixtures/gateway-e2e/node_modules/
 !tests/fixtures/node-types/node_modules/
@@ -32,6 +34,7 @@ output/
 !tests/fixtures/npm/cases/workspace-copied/members/*/dist/
 !tests/fixtures/npm/cases/workspace-copied/node_modules/*/dist/
 !tests/fixtures/provenance/node_modules/*/dist/
+!tests/fixtures/source-overlays/project/node_modules/.pnpm/**/dist/
 .scriptc/
 *.log
 .DS_Store

examples/spm-demo/.gitignore

@@ -0,0 +1,5 @@
+node_modules/
+.scriptc-pm/
+.scriptc/
+bin/
+results/

examples/spm-demo/measure.sh

@@ -0,0 +1,32 @@
+#!/bin/sh
+# Compile every probe in src/ with scriptc, with and without extra flags
+# (e.g. --sources), and record coverage, build result and Node parity.
+#   sh measure.sh <label> [scriptc flags...]
+# Writes results/<label>/<probe>.{coverage,build,node,native}.txt and prints a TSV row per probe.
+set -u
+here=$(cd "$(dirname "$0")" && pwd)
+label=$1
+shift
+scriptc=${SCRIPTC:-scriptc}
+out="$here/results/$label"
+mkdir -p "$out" "$here/bin/$label"
+printf 'probe\tlabel\tanalyzed\tstatic\tpct\tblockers\tdeferred\tbuild\trun\n'
+for src in "$here"/src/*.ts; do
+  probe=$(basename "$src" .ts)
+  (cd "$here" && node "src/$probe.ts" >"$out/$probe.node.txt" 2>&1; echo "exit=$?" >>"$out/$probe.node.txt")
+  (cd "$here" && $scriptc coverage "src/$probe.ts" "$@" >"$out/$probe.coverage.txt" 2>&1)
+  analyzed=$(awk '/statements analyzed/ {print $3; exit}' "$out/$probe.coverage.txt")
+  static=$(awk '/compile statically/ {print $3; exit}' "$out/$probe.coverage.txt")
+  pct=$(awk '/compile statically/ {gsub(/[()%]/, "", $4); print $4; exit}' "$out/$probe.coverage.txt")
+  blockers=$(awk '/^  blockers:/ {b=1; next} /^  [a-z]/ {b=0} b && /^ +×[0-9]+/ {sub(/×/, "", $1); n+=$1} END {print n+0}' "$out/$probe.coverage.txt")
+  deferred=$(awk '/deferred to runtime/ {print $4; exit}' "$out/$probe.coverage.txt")
+  if (cd "$here" && $scriptc build "src/$probe.ts" -o "bin/$label/$probe" "$@" >"$out/$probe.build.txt" 2>&1); then
+    build=ok
+    (cd "$here" && "./bin/$label/$probe" >"$out/$probe.native.txt" 2>&1; echo "exit=$?" >>"$out/$probe.native.txt")
+    if cmp -s "$out/$probe.node.txt" "$out/$probe.native.txt"; then run=match; else run=DIFF; fi
+  else
+    build=FAIL
+    run=-
+  fi
+  printf '%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n' "$probe" "$label" "${analyzed:--}" "${static:--}" "${pct:--}" "$blockers" "${deferred:-0}" "$build" "$run"
+done

examples/spm-demo/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "spm-demo",
+  "private": true,
+  "type": "module",
+  "dependencies": {
+    "@openfeature/core": "1.9.2",
+    "@openfeature/server-sdk": "1.18.0",
+    "@typescript-eslint/typescript-estree": "8.20.0",
+    "async-sema": "3.1.1",
+    "fast-glob": "3.3.3",
+    "path-to-regexp": "6.3.0",
+    "semver": "7.6.2",
+    "smol-toml": "1.9.0",
+    "ts-api-utils": "2.1.0",
+    "typescript": "5.7.3",
+    "undici": "5.29.0"
+  },
+  "devDependencies": {
+    "@types/node": "24.0.0",
+    "@types/semver": "7.5.8"
+  }
+}