docs(tmux): clarify tmux usage instructions

Amolith created 

Improve instructions for generating session IDs and naming windows.
Remove markdown bold from section headers. Add warning about excessive
tokens from full scrollback capture.

Change summary

skills/working-with-tmux/SKILL.md | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

Detailed changes

skills/working-with-tmux/SKILL.md 🔗 

@@ -17,7 +17,7 @@ First, verify you are running inside tmux:
 echo $TMUX
 ```
 
-If this returns empty, you are not running inside tmux. Create a new session named `agent-$(openssl rand -hex 3)`.
+If this returns empty, you are not running inside tmux. Use `echo "agent-$(openssl rand -hex 3)"` to generate a unique session ID, then create a new session with a window named after what you're working on. You may skip step 2.1, creating the new window within an existing session.
 
 Once verified, check your current windows:
 
@@ -47,19 +47,19 @@ To run a command (e.g., a dev server) in a way that persists and can be inspecte
 
 You can read the output of that pane at any time without switching your context.
 
-**Get the current visible screen:**
+Get the current visible screen:
 
 ```bash
 tmux capture-pane -p -t "server-log"
 ```
 
-**Get the entire history (scrollback):**
+Get the entire history (scrollback, can produce _excessive_ tokens):
 
 ```bash
 tmux capture-pane -p -S - -t "server-log"
 ```
 
-_Use this if the output might have scrolled off the screen._
+Prefer to pipe the full scrollback buffer through grep/sed/tac/etc. to view just the content between your last command and the next prompt (exclusive).
 
 ## 4. Interact with the Process