gsd-debugger

Specialist sub-agent invoked by /gsd-debug that “investigates bugs with persistent session state tracking hypotheses and evidence.” State persists to .planning/debug/, so a debugging investigation survives across turns and sessions. Applies pattern-systematic-debugging.

Its cross-framework counterpart is Matt Pocock’s mp-diagnosing-bugs skill — both run a disciplined, evidence-tracking debugging loop rather than guess-and-check (see equivalent_to).

See Also