[FEATURE] Report process id or window id in OSC99 notifications

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I would like to have the urgent flag on a window where claude just completed. I sometimes have multiple instances (some long running, some short, some exploratory) and I have no real idea what window just completed and even if you provided the name I don't necessarily remember where in my i3 workspace it is.

Proposed Solution

If the urgent bit was flipped I would get an immediate pointer to the workspace and window, greatly improving my efficiency. But to do that I need to be able to know which window id it was but they all report the same Claude Code title and no identifying information. A process id or window id would be the the way to do that.

In the terminal doing xdotool search --pid $PPID will get the window id, providing the PPID will also work here (it will be my kitty terminal).

Alternative Solutions

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Priority

High - Significant impact on productivity

Feature Category

Interactive mode (TUI)

Use Case Example

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Additional Context

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