Merge bugfix/macos-gnu-coreutils into develop

lib/tests/fast-libs.test.sh

@@ -36,17 +36,20 @@ check T4-none "$(bash "$L" detect "$tmp/cpp" >/dev/null 2>&1; echo $?)" 1
 check T5-missing "$(bash "$L" cache-status "$tmp/js" || true)" missing
 mkdir -p "$tmp/js/.ctx7-cache"; touch "$tmp/js/.ctx7-cache/react-core.md"
 check T6-fresh "$(bash "$L" cache-status "$tmp/js")" fresh
-touch -d '10 days ago' "$tmp/js/.ctx7-cache/react-core.md"
+# `touch -d '10 days ago'` is GNU-only; BSD touch (macOS) wants -t with an
+# absolute stamp. perl's utime is the one spelling both platforms ship.
+perl -e 'my $t = time - 10*86400; utime $t, $t, $ARGV[0]' \
+  "$tmp/js/.ctx7-cache/react-core.md"
 check T7-stale "$(bash "$L" cache-status "$tmp/js" || true)" stale
 
 # --- hook: fires once per session, silent on stable projects ---
 hook() { printf '{"prompt":"add a hook","session_id":"%s","cwd":"%s"}' \
   "$1" "$2" | TMPDIR="$tmp" bash "$H"; }
 check H1-fires "$(hook s1 "$tmp/js" | grep -c 'Fast-moving')" 1
-check H2-once "$(hook s1 "$tmp/js" | wc -l)" 0
-check H3-cpp-quiet "$(hook s2 "$tmp/cpp" | wc -l)" 0
+check H2-once "$(hook s1 "$tmp/js" | wc -l | tr -d ' ')" 0
+check H3-cpp-quiet "$(hook s2 "$tmp/cpp" | wc -l | tr -d ' ')" 0
 check H4-notif-quiet \
   "$(printf '{"prompt":"<task-notification>x","session_id":"s3","cwd":"%s"}' \
-    "$tmp/js" | TMPDIR="$tmp" bash "$H" | wc -l)" 0
+    "$tmp/js" | TMPDIR="$tmp" bash "$H" | wc -l | tr -d ' ')" 0
 
 printf 'PASS=%s FAIL=%s\n' "$pass" "$fail"; [ "$fail" -eq 0 ]

lib/tests/run-release-candidate.sh

@@ -38,7 +38,11 @@ echo
 ( cd "$WORK" || exit 1
   bash "$GITFLOW" start release 4.0.0 >/dev/null            # base develop → release/4.0.0 (lib L49/L71)
   printf '4.0.0\n' > version.txt                            # prep: version bump
-  sed -i 's/## \[Unreleased\]/## [Unreleased]\n\n## [4.0.0] — 2026-06-30/' CHANGELOG.md
+  # awk, not `sed -i`: BSD sed (macOS) needs a suffix argument after -i AND
+  # does not expand \n in the replacement — the edit silently did nothing
+  # there, so the CHANGELOG assertion below failed for the wrong reason.
+  awk '{ print; if ($0 == "## [Unreleased]") { print ""; print "## [4.0.0] — 2026-06-30" } }' \
+    CHANGELOG.md > CHANGELOG.tmp && cat CHANGELOG.tmp > CHANGELOG.md && rm -f CHANGELOG.tmp
   git commit -qam "chore(release): 4.0.0 — version.txt + CHANGELOG"
   bash "$GITFLOW" finish >/dev/null                         # fan-out main+develop+delete (lib L108-111)
   # TAG = the gap. Lives in the SKILL (lib untouched). RED skips it, GREEN does it.