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diff --git a/scripts/tests/rename-ai-artifact.bats b/scripts/tests/rename-ai-artifact.bats
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+#!/usr/bin/env bats
+#
+# Tests for scripts/rename-ai-artifact.sh — rename an .ai artifact (workflow or
+# script) across the canonical + mirror trees, rewriting every reference and
+# leaving archived session records (history) untouched.
+#
+# Strategy: build a synthetic git repo mirroring the canonical/mirror layout in
+# a temp dir, copy the real script in, and run it there. The script resolves
+# the repo root from git, so it operates entirely on the fixture. The verify
+# step (workflow-integrity / sync-check) is best-effort and skips when those
+# scripts are absent, which they are in the fixture.
+
+REAL_REPO="$(cd "$(dirname "$BATS_TEST_FILENAME")/../.." && pwd)"
+SCRIPT_SRC="$REAL_REPO/scripts/rename-ai-artifact.sh"
+
+setup() {
+  REPO="$(mktemp -d -t rename-bats.XXXXXX)"
+  mkdir -p "$REPO/scripts"
+  cp "$SCRIPT_SRC" "$REPO/scripts/rename-ai-artifact.sh"
+  # Canonical + mirror trees.
+  for base in "$REPO/claude-templates/.ai" "$REPO/.ai"; do
+    mkdir -p "$base/workflows" "$base/scripts" "$base/sessions"
+    printf '* Summary\nThe foo workflow.\nTriggers: "run the foo workflow"\n' > "$base/workflows/foo.org"
+    printf '#+TITLE: Index\n- =foo.org= — the foo workflow.\n- =foobar.org= — unrelated, must survive.\n' > "$base/workflows/INDEX.org"
+    printf '* Summary\nThe foobar workflow (must not be touched by a foo rename).\n' > "$base/workflows/foobar.org"
+    printf '#!/usr/bin/env python3\n# foo-helper for the foo workflow\nprint("foo-helper")\n' > "$base/scripts/foo-helper.py"
+    printf 'Old session mentioning foo and foo.org — this is history.\n' > "$base/sessions/2026-01-01-old.org"
+  done
+  printf 'See foo.org and foo-helper.py. Also foobar.org stays.\n' > "$REPO/notes.org"
+  ( cd "$REPO" && git init -q && git add -A && git -c user.email=t@t -c user.name=t commit -qm init )
+}
+
+teardown() {
+  rm -rf "$REPO"
+}
+
+run_rename() {  # OLD NEW
+  ( cd "$REPO" && bash scripts/rename-ai-artifact.sh "$1" "$2" )
+}
+
+# --- Normal: workflow rename across both trees ---
+
+@test "rename: moves a workflow in both canonical and mirror" {
+  run run_rename foo.org bar.org
+  [ "$status" -eq 0 ]
+  [ -f "$REPO/claude-templates/.ai/workflows/bar.org" ]
+  [ -f "$REPO/.ai/workflows/bar.org" ]
+  [ ! -e "$REPO/claude-templates/.ai/workflows/foo.org" ]
+  [ ! -e "$REPO/.ai/workflows/foo.org" ]
+}
+
+@test "rename: rewrites references in the index and prose" {
+  run_rename foo.org bar.org
+  grep -q "=bar.org=" "$REPO/.ai/workflows/INDEX.org"
+  grep -q "run the bar workflow" "$REPO/.ai/workflows/bar.org"
+  grep -q "bar.org" "$REPO/notes.org"
+  ! grep -q "foo.org" "$REPO/notes.org"
+}
+
+# --- The kernel: history is untouched, near-miss names survive ---
+
+@test "rename: archived session records are left as history" {
+  run_rename foo.org bar.org
+  grep -q "mentioning foo and foo.org" "$REPO/.ai/sessions/2026-01-01-old.org"
+  grep -q "mentioning foo and foo.org" "$REPO/claude-templates/.ai/sessions/2026-01-01-old.org"
+}
+
+@test "rename: a longer name sharing the prefix is not corrupted" {
+  run_rename foo.org bar.org
+  # foobar.org and its index row must be intact — token-boundary matching.
+  [ -f "$REPO/.ai/workflows/foobar.org" ]
+  grep -q "=foobar.org=" "$REPO/.ai/workflows/INDEX.org"
+  grep -q "foobar.org stays" "$REPO/notes.org"
+}
+
+# --- Script artifact (no .org extension to strip cleanly) ---
+
+@test "rename: renames a script artifact and its references" {
+  run run_rename foo-helper.py baz-helper.py
+  [ "$status" -eq 0 ]
+  [ -f "$REPO/.ai/scripts/baz-helper.py" ]
+  [ -f "$REPO/claude-templates/.ai/scripts/baz-helper.py" ]
+  grep -q "baz-helper.py" "$REPO/notes.org"
+  ! grep -q "foo-helper" "$REPO/notes.org"
+}
+
+@test "rename: also rewrites the underscore module-name variant" {
+  # A python test imports the hyphenated script under an underscored module
+  # name, the way importlib.spec_from_file_location does. Renaming the script
+  # must update both the hyphen path and the underscore module name.
+  for base in "$REPO/claude-templates/.ai" "$REPO/.ai"; do
+    printf 'spec_from_file_location("foo_helper", "foo-helper.py")\n' \
+      > "$base/scripts/uses-helper.py"
+  done
+  ( cd "$REPO" && git add -A && git -c user.email=t@t -c user.name=t commit -qm add )
+  run run_rename foo-helper.py baz-helper.py
+  [ "$status" -eq 0 ]
+  grep -q 'spec_from_file_location("baz_helper", "baz-helper.py")' "$REPO/.ai/scripts/uses-helper.py"
+  ! grep -q "foo_helper" "$REPO/.ai/scripts/uses-helper.py"
+}
+
+# --- Errors ---
+
+@test "rename: refuses when the source artifact does not exist" {
+  run run_rename nope.org bar.org
+  [ "$status" -ne 0 ]
+  [[ "$output" == *"not found"* ]]
+}
+
+@test "rename: refuses when the target already exists" {
+  run run_rename foo.org foobar.org
+  [ "$status" -ne 0 ]
+  [[ "$output" == *"exists"* ]]
+}
+
+@test "rename: refuses bad usage (missing args)" {
+  run bash "$REPO/scripts/rename-ai-artifact.sh" only-one-arg
+  [ "$status" -ne 0 ]
+}