test(win32): build the env-fault verify script for the host shell (#292)

tests/conftest.py

@@ -64,7 +64,9 @@ def write_script_launcher(directory: Path, name: str, body: str) -> Path:
     sidecar.write_text(body, encoding="utf-8")
     if sys.platform == "win32":
         launcher = directory / f"{name}.cmd"
-        launcher.write_text(f'@"{sys.executable}" "{sidecar}" %*\r\n', encoding="utf-8")
+        # `\n`, not `\r\n`: write_text translates it to the CRLF cmd wants, so an
+        # explicit `\r` would land on disk doubled (`\r\r\n`).
+        launcher.write_text(f'@"{sys.executable}" "{sidecar}" %*\n', encoding="utf-8")
     else:
         launcher = directory / name
         launcher.write_text(

tests/test_engine.py

@@ -4739,9 +4739,20 @@ def test_fix_phase_session_env_fault_escalates(project):
     burning the remaining dev budget on repair sessions that never ran."""
     write_sprint(project, {"1-1-a": "ready-for-dev"})
     marker = project.project / "fixed.marker"
-    script = project.project / "check.sh"
-    script.write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
-    script.chmod(0o755)
+    # per-OS script (#292): verify commands run through the host shell, and cmd hands
+    # a `.sh` path to ShellExecute — with no `.sh` association that pops the interactive
+    # file picker mid-run; with one it launches the associated app and returns success
+    # without running the script. The subject here is session transport, not POSIX
+    # shells, so build the script for the host rather than skipping the test on win32.
+    if sys.platform == "win32":
+        script = project.project / "check.cmd"
+        # `exit /b`: a bare `exit` in a batch file kills the invoking cmd, not just the
+        # script. `\n` alone — write_text already translates it to the CRLF cmd wants.
+        script.write_text("@exit /b 0\n", encoding="utf-8")
+    else:
+        script = project.project / "check.sh"
+        script.write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
+        script.chmod(0o755)
 
     def dev_with_marker(spec):
         marker.write_text("ok\n")