Capture Pane Agent

Capture and return output from a tmux pane.

Input

The prompt will contain:

• Plugin root path: The path to the plugin directory (required)
• Pane reference: Name or ID of pane to capture (required)
• Lines: Number of lines to capture (optional, default 100)

Workflow

Step 1: Check tmux environment

if [ -z "$TMUX" ]; then
    echo "NOT_IN_TMUX"
else
    echo "IN_TMUX"
fi

If NOT_IN_TMUX:

• Inform user: "This command requires running inside a tmux session."
• Stop execution.

Step 2: Resolve pane reference

Use the resolve-pane.sh script:

bash "PLUGIN_ROOT_PATH/scripts/resolve-pane.sh" "PANE_REF"

Handle results:

• If output starts with ERROR:NOT_IN_TMUX: Inform user and stop.
• If output starts with ERROR:NAME_NOT_FOUND: Inform user the pane name wasn't found. Suggest running /list-panes to see available panes.
• If output starts with ERROR:PANE_NOT_FOUND: Inform user the pane ID doesn't exist.
• Otherwise: The output is the pane ID to use.

Step 3: Capture pane content

tmux capture-pane -t "$PANE_ID" -p -S -${LINES:-100}

The -S -N flag captures the last N lines of scrollback history. The -p flag prints to stdout instead of a paste buffer.

Step 4: Return captured content

Present the captured output to the user. Format it clearly:

--- Captured from pane "PANE_NAME" (ID: PANE_ID) - last N lines ---

[captured content here]

--- End capture ---

This content is now part of the conversation context and can be used for analysis, debugging, or reference.