PR11.5: Statement Ergonomics

[agentc1]

Milestone PR11.5

Dependencies

• PR11.4: Signature and Control-Flow Syntax #80

Unlocks

• PR11.6: Alternate Block Syntax Modes #82

Acceptance Criteria

• Optional semicolons and statement-local var declarations are the only syntax admissions in scope for this milestone.
• Semicolon insertion and statement-local declaration legality are bounded so they do not accidentally broaden task, block, or unrelated statement semantics.
• Corpus migration guidance plus Rosetta-side readability and ambiguity evidence back the admitted statement-ergonomics surface.