2 files changed, 77 insertions, 0 deletions
diff --git a/scripts/tests/install-ai.bats b/scripts/tests/install-ai.bats
index 9c6040c..14f1152 100644
--- a/scripts/tests/install-ai.bats
+++ b/scripts/tests/install-ai.bats
@@ -200,3 +200,39 @@ LAUNCHER="$REAL_REPO/claude-templates/bin/install-ai"
   [ "$status" -eq 0 ]
   [[ "$output" == *"Bootstrap .ai/"* ]]
 }
+
+# --- temp/ ephemeral-artifacts ignore (working/ tracked-from-creation ruling) ---
+
+@test "install-ai --gitignore: ignores temp/ but never working/" {
+  mkdir -p "$TEST_HOME/code/fresh"
+  (cd "$TEST_HOME/code/fresh" && git init -q)
+
+  run bash "$INSTALL_AI" --gitignore "$TEST_HOME/code/fresh"
+
+  [ "$status" -eq 0 ]
+  grep -qFx "temp/" "$TEST_HOME/code/fresh/.gitignore"
+  # working/ is the tracked home of in-progress work — it must never be ignored.
+  ! grep -qEx "/?working/?" "$TEST_HOME/code/fresh/.gitignore"
+}
+
+@test "install-ai --track: ignores temp/ even in track mode" {
+  mkdir -p "$TEST_HOME/code/tracked"
+  (cd "$TEST_HOME/code/tracked" && git init -q)
+
+  run bash "$INSTALL_AI" --track "$TEST_HOME/code/tracked"
+
+  [ "$status" -eq 0 ]
+  # temp/ is ephemeral regardless of whether the project tracks its .ai/ tooling.
+  grep -qFx "temp/" "$TEST_HOME/code/tracked/.gitignore"
+}
+
+@test "install-ai: temp/ ignore is idempotent (not re-added)" {
+  mkdir -p "$TEST_HOME/code/fresh"
+  (cd "$TEST_HOME/code/fresh" && git init -q)
+  printf 'temp/\n' > "$TEST_HOME/code/fresh/.gitignore"
+
+  run bash "$INSTALL_AI" --gitignore "$TEST_HOME/code/fresh"
+
+  [ "$status" -eq 0 ]
+  [ "$(grep -cFx 'temp/' "$TEST_HOME/code/fresh/.gitignore")" -eq 1 ]
+}
diff --git a/scripts/tests/sweep-gitignore-tooling.bats b/scripts/tests/sweep-gitignore-tooling.bats
index f18eac5..240c3be 100644
--- a/scripts/tests/sweep-gitignore-tooling.bats
+++ b/scripts/tests/sweep-gitignore-tooling.bats
@@ -190,3 +190,44 @@ make_project() {
   [ "$status" -eq 0 ]
   [[ "$output" != *"publicly reachable"* ]]
 }
+
+# --- temp/ ephemeral-artifacts backfill (mode-independent) ---
+
+@test "sweep: adds temp/ to a gitignore-mode project" {
+  make_project gimode $'.ai/\n'
+
+  run bash "$SWEEP" "$ROOT"
+
+  [ "$status" -eq 0 ]
+  grep -qFx "temp/" "$ROOT/gimode/.gitignore"
+}
+
+@test "sweep: adds temp/ to a TRACK-mode project too (temp/ is mode-independent)" {
+  make_project trackmode $'# build\nout/\n'
+
+  run bash "$SWEEP" "$ROOT"
+
+  [ "$status" -eq 0 ]
+  # The tooling set is skipped in track mode, but temp/ is not.
+  grep -qFx "temp/" "$ROOT/trackmode/.gitignore"
+  ! grep -qFx ".ai/" "$ROOT/trackmode/.gitignore"
+}
+
+@test "sweep: never adds working/" {
+  make_project gimode $'.ai/\n'
+
+  run bash "$SWEEP" "$ROOT"
+
+  [ "$status" -eq 0 ]
+  ! grep -qEx "/?working/?" "$ROOT/gimode/.gitignore"
+}
+
+@test "sweep: temp/ backfill is idempotent" {
+  make_project gimode $'.ai/\ntemp/\n'
+  bash "$SWEEP" "$ROOT" >/dev/null
+
+  run bash "$SWEEP" "$ROOT"
+
+  [ "$status" -eq 0 ]
+  [ "$(grep -cFx 'temp/' "$ROOT/gimode/.gitignore")" -eq 1 ]
+}