Improve skills and document updates

.agents/skills/references/artifact-policy.md

@@ -50,7 +50,7 @@ dependency closure before downloading.
 - Download artifacts into the selected helper state directory, normally:
 
   ```bash
-  <state_dir>/instances/<instance>/downloads/<plugin-id>/
+  <state_dir>/cache/downloads/<instance>/<plugin-id>/
   ```
 
 - Record SHA-256 checksums for downloaded or built artifacts.

.agents/skills/references/live-validation.md

@@ -9,8 +9,12 @@ Use this policy when a task changes or verifies a live BSManager instance.
   the current duration in `docs/SMOKETEST.md` unless the user requested a
   different duration.
 - Do not rely on `timeout` to kill the full game process tree.
-- Prefer the documented foreground Proton launch with a background watchdog that
+- On Linux, prefer the documented foreground Proton launch with a background watchdog that
   sleeps for the smoke window, then terminates Beat Saber by process name.
+- On native Windows, launch `Beat Saber.exe --no-yeet fpfc` from the instance
+  directory. Wait until `Logs/_latest.log` shows `MainSystemInit`, or about 20
+  seconds, then stop the `Beat Saber` process. See the Windows section in
+  `docs/SMOKETEST.md`.
 - After the run, confirm no Beat Saber process remains. If cleanup fails, say so
   and ask the user to close it manually.
 

.agents/skills/references/state-and-profiles.md

@@ -29,7 +29,8 @@ checkout locations.
 
 ## Profiles
 
-- Read `plugin-helper.local.toml` before choosing a configured profile:
+- `--state-dir .state` without a profile uses the `default` install id. A native Windows BSManager tree is the `windows` profile. When `plugin-helper.local.toml` is absent, pass `--config plugin-helper.windows.toml.example --profile windows`.
+- Read `plugin-helper.local.toml` before choosing a configured profile when that file exists:
 
   ```bash
   sed -n '1,220p' plugin-helper.local.toml