Two-part fix from PR #268 (ported by Integration Tester after PR #268
was closed without merge):
PART 1 — workspace/builtin_tools/a2a_tools.py: Fixes AttributeError
when platform returns a plain string as the error field. Before:
data["error"].get("message") ← crashes if error is a string
After:
isinstance(err, dict) → err.get("message")
isinstance(err, str) → use err directly
otherwise → str(err)
Also guards result.get("parts") against non-dict result.
Includes fix for issue #279: empty-parts regression where
{"parts": []} returned "(no text)" instead of str(result).
PART 2 — .gitea/workflows/ and .github/workflows/
publish-workspace-server-image.yml: Removed dead "staging" branch
trigger. Trunk-based migration (2026-05-08) removed the staging branch
but the workflow triggers were not updated.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>