CI: NORTH_STAR2_VERIFY_GATE default-on in ci-fast (prereq #1865 ✅)

[PurHur]

Problem

#1865 / #1928 landed script/north-star2-verify.sh and make north-star2-verify, but NORTH_STAR2_VERIFY_GATE still defaults to 0 in script/ci-defaults.env. Contributors must remember opt-in env for the NS2 presenter in ci-fast.sh; ci-common.sh prints a skip message referencing stale “pending #1865”.

North Star 1 presenter (NORTH_STAR1 / #1845) is the model: default-on when stable, opt-out for iteration.

Goal

When make north-star2-verify passes on master with LLVM 9 (or skips LLVM tail cleanly):

1. Set NORTH_STAR2_VERIFY_GATE=1 default in script/ci-defaults.env
2. ci-fast.sh runs ci_run_north_star2_verify() without opt-in
3. Opt-out: NORTH_STAR2_VERIFY_GATE=0 ./script/ci-fast.sh for doc-only / no-LLVM hosts
4. Update docs/local-ci-matrix.md, docs/bootstrap-selfhost.md, lib/Doctor.php gate text (remove “pending DevEx: make north-star2-verify presenter gate (self-host M0–M4) #1865”)
5. test/unit/CiScriptsTest.php asserts default :-1

Implementation hints

File	Change
script/ci-defaults.env	NORTH_STAR2_VERIFY_GATE="${NORTH_STAR2_VERIFY_GATE:-1}"
script/ci-common.sh	Skip message → opt-out wording
script/ci-docker-run.sh	Pass env through
lib/Doctor.php	NS2 ci-fast row default-on
docs/local-ci-matrix.md	Gate table 0 → 1

Acceptance criteria

./script/ci-fast.sh   # includes north-star2-verify when script exists
NORTH_STAR2_VERIFY_GATE=0 ./script/ci-fast.sh   # skips presenter
docker run --rm -v "$(pwd):/compiler" -w /compiler php-compiler:22.04-dev ./script/ci-fast.sh

No GitHub Actions required.

Dependencies

• DevEx: make north-star2-verify presenter gate (self-host M0–M4) #1865 ✅ script · Self-host M3: Native emit for compiler compile-smoke fixture (post-#1493) #1937 strict probes may fail step 5 until M3 emit lands (presenter already supports --strict / partial skips)

Links

• Epic: Self-host critical path — compiler compiles itself (M3→M5) #1492 epic · ROADMAP 🗺️ ROADMAP: Self-host + web-capable PHP subset (living) #78 · DevEx: make north-star1-verify presenter gate before #1044 close #1845 NS1 parity

[PurHur]

Ready for implementation (batch 111)

Prerequisite #1865 ✅ closed — script/north-star2-verify.sh and make north-star2-verify are on master (#2046).

Change: set NORTH_STAR2_VERIFY_GATE default to 1 in script/ci-defaults.env and ensure script/ci-fast.sh runs the presenter (already wired in ci-common.sh when gate=1).

Verify:

NORTH_STAR2_VERIFY_GATE=1 ./script/ci-fast.sh
# or Docker:
docker run --rm -v "$(pwd):/compiler" -w /compiler php-compiler:22.04-dev \
  env NORTH_STAR2_VERIFY_GATE=1 ./script/ci-fast.sh

Sibling: #2052 (006 README/rebuild sync gates), #2053 (doctor --selfhost).