docs: gate hf skill install behind --install-cli

plans/harborforge-cli-go-plan.md

@@ -155,6 +155,18 @@ Default target location:
 
 The implementation should be profile-aware, but default to the standard OpenClaw profile path above.
 
+#### Special rule for `skills/hf/`
+
+The plugin `skills/` directory should include an `hf/` subfolder.
+
+However:
+- if installer is run **without** `--install-cli`, do **not** copy `skills/hf/` into the OpenClaw profile skills directory
+- if installer is run **with** `--install-cli`, then `skills/hf/` should be copied together with the CLI installation flow
+
+In other words:
+- normal plugin install copies regular plugin skills
+- `hf` skill content is gated behind `--install-cli`
+
 ### 8. Implication for implementation planning
 
 This means the CLI plan is no longer only about `hf` command syntax.