## Why
Skill completion inserts a trailing space, leaving unwanted whitespace when the next typed character is punctuation, such as `$rustdoc ,`.
## What changed
Replace the space inserted by skill completion when immediately followed by common closing punctuation, producing `$rustdoc,` instead. Support both skill mention pickers, including full-width punctuation and `》`, while preserving skill bindings.
Preserve existing draft whitespace and keep the separator for pasted text or punctuation entered after cursor navigation. Classify buffered punctuation as typing or a paste burst before deciding whether to remove the space.
## Testing
Add regression tests for punctuation, existing spacing, cursor navigation, and paste bursts, plus a snapshot covering `》`, recovery state, and preserved skill bindings.
GitOrigin-RevId: 8988add8092e8cb5f0618ef834590d52a81ad576
Benjamin Carlsson
1455fda735