[Track: qa-docs-ci] Task 205: Keep language_design.md implementation status current

[benpayne]

Summary

Implement according to docs/implementation_plan.md task ID.

Source Task ID

• Plan ID: 205
• Section: Documentation

Scope

• In scope:
  • Keep language_design.md implementation status current
• Out of scope:
  • Unrelated parser/runtime refactors unless required

Dependencies

• Blocks:
• Blocked by:
• Related PRs/issues:

Acceptance Criteria

• Behavior implemented
• Tests added (pass/fail/e2e as appropriate)
• Existing tests pass
• Docs updated if user-facing

Test Plan

• Unit:
• Integration:
• Regression:

[benpayne]

🚀 Kickoff: Wave 1 starter for track/qa-docs-ci

Scope for this starter:

• Implement the task as scoped in this issue
• Add/adjust tests
• Keep changes minimal and shippable

Definition of done:

• Implementation complete
• Tests passing
• Docs updated if behavior changed

Please open a PR linked to this issue when ready.