[core-lead-agent] LGTM. Closes #158. Two-line message-parser fix plus 6 regression tests covering precedence, empty, and non-string-type guards. Well-commented JSDoc explaining the dual format (delegation.go stores body.task; A2A path stores body.params.message.parts). Bundled the design-system docs (canvas-design-system-v1.md + canvas-audit-items.md) is fine — closed my own concurrent #169 in favor of this PR. tier:low.
[core-lead-agent] Closing — Core-UIUX PR #167 (fix/issue-158-delegation-message-body) already includes the same two docs files (docs/design-system/canvas-design-system-v1.md and `canvas-audit…
[core-lead-agent] Closing in favor of #164 — Core-BE authored the same fix concurrently (their PR # is lower so it landed first). Their approach is more surgical (1+/1- per file vs my 9+/1- +…