1 files changed, 99 insertions, 0 deletions
diff --git a/scripts/tests/install-lang.bats b/scripts/tests/install-lang.bats
index ecfbe01..c00b915 100644
--- a/scripts/tests/install-lang.bats
+++ b/scripts/tests/install-lang.bats
@@ -79,6 +79,76 @@ teardown() {
   grep -qxF "coverage/" "$PROJECT/.gitignore"
 }
 
+@test "install-lang: seeds the language-neutral default CLAUDE.md when the bundle ships none" {
+  # Every shipping bundle now carries its own CLAUDE.md (python and typescript
+  # gained theirs 2026-07-23), so the fallback needs a synthetic bundle to
+  # exercise. Keep testing it: the fallback is what stops a bundle added later,
+  # before its CLAUDE.md is written, from inheriting another language's header.
+  fake="$REAL_REPO/languages/zz-test-noclaude"
+  mkdir -p "$fake/claude/rules"
+  printf '# rule\n' > "$fake/claude/rules/zz.md"
+  run bash "$INSTALL_LANG" zz-test-noclaude "$PROJECT"
+  rm -rf "$fake"
+
+  [ "$status" -eq 0 ]
+  [ -f "$PROJECT/CLAUDE.md" ]
+  # The default names no language, so it can't mislabel a project the way
+  # inheriting elisp's "Elisp project" header did.
+  ! grep -qi "Elisp project" "$PROJECT/CLAUDE.md"
+  grep -qF "names no language" "$PROJECT/CLAUDE.md"
+  [[ "$output" == *"language-neutral default"* ]]
+}
+
+@test "install-lang python: seeds the bundle's own CLAUDE.md, not the default" {
+  run bash "$INSTALL_LANG" python "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  grep -qF "Python project." "$PROJECT/CLAUDE.md"
+  [[ "$output" == *"CLAUDE.md installed (python)"* ]]
+}
+
+@test "install-lang typescript: seeds the bundle's own CLAUDE.md, not the default" {
+  run bash "$INSTALL_LANG" typescript "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  grep -qF "TypeScript/JavaScript project." "$PROJECT/CLAUDE.md"
+  [[ "$output" == *"CLAUDE.md installed (typescript)"* ]]
+}
+
+@test "install-lang elisp: seeds the bundle's own CLAUDE.md, not the default" {
+  run bash "$INSTALL_LANG" elisp "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  grep -qF "Elisp project." "$PROJECT/CLAUDE.md"
+  [[ "$output" == *"CLAUDE.md installed (elisp)"* ]]
+}
+
+@test "install-lang python: does not overwrite an existing CLAUDE.md without FORCE" {
+  echo "MY OWN CLAUDE" > "$PROJECT/CLAUDE.md"
+  run bash "$INSTALL_LANG" python "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  grep -qxF "MY OWN CLAUDE" "$PROJECT/CLAUDE.md"
+}
+
+@test "install-lang bash: full bundle lands (rules, hook, settings, githook, CLAUDE.md)" {
+  run bash "$INSTALL_LANG" bash "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  # Language + testing rules — the bundle's sync fingerprint
+  [ -f "$PROJECT/.claude/rules/bash.md" ]
+  [ -f "$PROJECT/.claude/rules/bash-testing.md" ]
+  # PostToolUse validate hook, executable and wired into settings
+  [ -x "$PROJECT/.claude/hooks/validate-bash.sh" ]
+  grep -qF "validate-bash.sh" "$PROJECT/.claude/settings.json"
+  # Pre-commit githook
+  [ -x "$PROJECT/githooks/pre-commit" ]
+  # The bundle ships its own CLAUDE.md, so it wins over the neutral default
+  grep -qF "Bash/shell project" "$PROJECT/CLAUDE.md"
+  # Gitignore footprint
+  grep -qxF ".claude/" "$PROJECT/.gitignore"
+}
+
 @test "install-lang go: full bundle lands (rules, hook, settings, githook, CLAUDE.md, coverage)" {
   run bash "$INSTALL_LANG" go "$PROJECT"
 
@@ -100,3 +170,32 @@ teardown() {
   grep -qxF ".claude/" "$PROJECT/.gitignore"
   grep -qxF "cover.out" "$PROJECT/.gitignore"
 }
+
+@test "install-lang python: full bundle lands (rules, hook, settings, githook, CLAUDE.md, coverage)" {
+  run bash "$INSTALL_LANG" python "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  [ -f "$PROJECT/.claude/rules/python-testing.md" ]
+  # PostToolUse validate hook, executable and wired into settings
+  [ -x "$PROJECT/.claude/hooks/validate-python.sh" ]
+  grep -qF "validate-python.sh" "$PROJECT/.claude/settings.json"
+  # Pre-commit githook — the secret scan. Absent until 2026-07-23.
+  [ -x "$PROJECT/githooks/pre-commit" ]
+  grep -qF "potential secret" "$PROJECT/githooks/pre-commit"
+  # Coverage slice
+  [ -f "$PROJECT/.claude/scripts/coverage-summary.py" ]
+  grep -qxF ".claude/" "$PROJECT/.gitignore"
+}
+
+@test "install-lang typescript: full bundle lands (rules, hook, settings, githook, CLAUDE.md, coverage)" {
+  run bash "$INSTALL_LANG" typescript "$PROJECT"
+
+  [ "$status" -eq 0 ]
+  [ -f "$PROJECT/.claude/rules/typescript-testing.md" ]
+  [ -x "$PROJECT/.claude/hooks/validate-typescript.sh" ]
+  grep -qF "validate-typescript.sh" "$PROJECT/.claude/settings.json"
+  [ -x "$PROJECT/githooks/pre-commit" ]
+  grep -qF "potential secret" "$PROJECT/githooks/pre-commit"
+  [ -f "$PROJECT/.claude/scripts/coverage-summary.js" ]
+  grep -qxF ".claude/" "$PROJECT/.gitignore"
+}