The existing wheel-smoke catches AgentCard kwarg-shape regressions
(state_transition_history, supported_protocols) but doesn't catch the
SDK-contract drift class that #2193 just fixed in production: the
a2a-sdk 1.x rename of /.well-known/agent.json →
/.well-known/agent-card.json, plus AGENT_CARD_WELL_KNOWN_PATH moving
to a2a.utils.constants. main.py's readiness probe hardcoded the old
literal and 404'd every attempt, silently dropping every workspace's
initial_prompt for ~weeks before a user reported it.
Two additions to the smoke block:
1. Mount alignment: build an AgentCard, call create_agent_card_routes(),
and assert AGENT_CARD_WELL_KNOWN_PATH is among the mounted paths.
Catches a future SDK release that decouples the constant value
from the route factory's mount path. The source-tree test
(workspace/tests/test_agent_card_well_known_path.py) catches the
main.py side; this catches the SDK side BEFORE PyPI upload.
2. Message helper smoke: import a2a.helpers.new_text_message and
instantiate one. The v0→v1 cheat sheet (memory:
reference_a2a_sdk_v0_to_v1_migration.md) flagged this as a real
migration find — main.py and a2a_executor.py call it in hot
paths, so an import break errors every reply before the message
even leaves the workspace.
Verified by running the equivalent Python inside
ghcr.io/molecule-ai/workspace-template-langgraph:latest:
✓ well-known mount alignment OK (/.well-known/agent-card.json)
✓ message helper import + call OK
Closes the structural-fix half of the #2193 finding from the code-
review-and-quality pass: "the wheel publish smoke didn't catch this.
This is the 7th a2a-sdk migration find of this kind. Task #131 is the
right root-cause fix."
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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