diff --git a/skills/subagent-driven-development/SKILL.md b/skills/subagent-driven-development/SKILL.md
index b3dfb6f9..d8ca0815 100644
--- a/skills/subagent-driven-development/SKILL.md
+++ b/skills/subagent-driven-development/SKILL.md
@@ -260,6 +260,8 @@ a ledger file, not only in todos.
 - The ledger is your recovery map: the commits it names exist in git even
   when your context no longer remembers creating them. After compaction,
   trust the ledger and `git log` over your own recollection.
+- `git clean -fdx` will destroy the ledger (it's git-ignored scratch); if
+  that happens, recover from `git log`.
 
 ## Prompt Templates
 
diff --git a/tests/claude-code/run-skill-tests.sh b/tests/claude-code/run-skill-tests.sh
index cdb8da6e..c94cfec9 100755
--- a/tests/claude-code/run-skill-tests.sh
+++ b/tests/claude-code/run-skill-tests.sh
@@ -74,6 +74,7 @@ done
 # List of skill tests to run (fast unit tests)
 tests=(
     "test-worktree-path-policy.sh"
+    "test-sdd-workspace.sh"
     "test-subagent-driven-development.sh"
 )