docs(pty): keep model experience field canonical

packages/pty/tool-pty/README.md

@@ -44,9 +44,7 @@ Prefix-stable while tool visibility and definitions are unchanged.
 
 #### What the model sees
 
-Spawn returns the id and bounded MOTD. Send/read return bounded terminal text plus readiness/history markers. Background mode returns a generic task id. Results remain in session history until compaction; incremental task reads do not repeat consumed output.
-
-Programmatic callers receive typed session snapshots, bounded send/read DTOs, signal and close outcomes, or `{ kind: "background", taskId }`; Native rendering preserves the text above.
+Spawn returns the id and bounded MOTD. Send/read return bounded terminal text plus readiness/history markers. Background mode returns a generic task id. Results remain in session history until compaction; incremental task reads do not repeat consumed output. Programmatic callers receive typed session snapshots, bounded send/read DTOs, signal and close outcomes, or `{ kind: "background", taskId }`; Native rendering preserves the text above.
 
 #### Token effect