v5.2.0

Added

• Context-window statusline (scripts/mb-statusline.py): a Claude Code
  statusline that shows how much of the context window is filled (used/limit,
  1M-aware) alongside model · git branch · project. Reads Claude Code's status
  JSON on stdin, counts the latest main-chain usage, and skips sidechain
  (subagent) usage so subagent tokens never inflate the count. /mb statusline
  (→ mb-statusline.py --install) wires it into ~/.claude/settings.json with
  a backup and refuses to clobber an existing statusLine unless --force.