diff --git a/.claude/memory/learnings.md b/.claude/memory/learnings.md
index 49cea12..c3f9909 100644
--- a/.claude/memory/learnings.md
+++ b/.claude/memory/learnings.md
@@ -94,4 +94,15 @@ rules:
     ```
   - Detection of "is this MCP correctly set up?" must look for the derived name (`caveman-shrink-*`), not the bare proxy name. Bare-name registration is treated as broken.
   - Default install scripts should NOT auto-register middleware MCPs — print the snippet for the user to choose an upstream. See `install-plugins.sh` STEP 5.5.
-- **Reference**: commit `9b20b84`, `lib/detect-plugins.sh:detect_caveman_shrink`, `install-plugins.sh` STEP 5.5 MCP block.
\ No newline at end of file
+- **Reference**: commit `9b20b84`, `lib/detect-plugins.sh:detect_caveman_shrink`, `install-plugins.sh` STEP 5.5 MCP block.
+
+## LRN-007 — `toggle-external.sh enable` missed source-only state
+
+- **Date**: 2026-05-06
+- **Pattern**: `lib/toggle-external.sh enable <tool>` for npx/external skills (`darwin-skill`, `find-skills`, `emil-design-eng`) handled 2 states only: symlink in `skills-disabled/` → move to `skills/`, or symlink in `skills/` → already enabled. Missed 3rd: source dir at `~/.agents/skills/<tool>` but no symlink. First-run after `make plugin` lands here until `bash link.sh` runs. `enable` errored `not installed — run: make plugin` — misleading, plugin already installed.
+- **Context**: user ran `./lib/toggle-external.sh enable darwin-skill` after fresh install. `~/.agents/skills/darwin-skill/` populated by `install-plugins.sh` STEP 8.5 npx call, but `link.sh` (separate step) not run, so `skills/darwin-skill` symlink never created. Fix `lib/toggle-external.sh:161-179` — add `elif [ -d "$src" ]` branch creating symlink direct when source dir present. Error message now show resolved source path.
+- **Future application**:
+  - Any toggle script for tools with separate install + symlink steps must check 3 states: disabled-dir, enabled-dir, source-only. Source-only branch create symlink in place, not fail.
+  - Error messages name path checked, not abstract tool name — caller verify install vs symlink state without rereading script.
+  - Symmetric pairs (`enable`/`disable`) both handle same lifecycle states; missing state in one half = silent dead end.
+- **Reference**: `lib/toggle-external.sh:161-179`, `link.sh:69-83`, `install-plugins.sh:598-633` STEP 8.5.
\ No newline at end of file