context_sensitive_lexer_scaling

Context-sensitive token classification for structural / prose braces and top-level import keywords must remain linear in document size.
The lexer records brace-depth changes sparsely ( not per-character tables ) and looks them up in log time while tokenising, so workspace language-server initialization and editor re-lexes stay bounded.
Code fences are skipped during the brace scan so example braces cannot inflate work or desync depth.
Bounded work still assumes the lexer / parser * returns *; unbounded hangs are cut by parse_budget_timeout.

Status: done

Interactive page: context_sensitive_lexer_scaling