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`multi_turn_simulation()` calls `POST /agents/{systemVersionId}/simulate`
once per turn. That endpoint was removed from the API in
scorecard-ai/scorecard#1008, which retired the Sim Agents and multi-turn
simulation surfaces, so every call now 404s. The helper cannot be made
to work from the client side.
Removes `src/scorecard_ai/lib/_multi_turn_simulation.py` and its exports
from `scorecard_ai.lib`: `multi_turn_simulation`, `StopCheck`,
`StopChecks`, `ChatMessage`, and `ConversationInfo`. Nothing else in the
package imported the module.
BREAKING CHANGE: `multi_turn_simulation`, `StopCheck`, `StopChecks`,
`ChatMessage`, and `ConversationInfo` are no longer exported from
`scorecard_ai.lib`. The API endpoint they relied on no longer exists, so
pinning an older SDK version does not keep them working.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Yash1hi
approved these changes
Sep 22, 2026
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multi_turn_simulation()callsPOST /agents/{systemVersionId}/simulateonce per conversation turn (_multi_turn_simulation.py:210). That endpoint was removed from the API in scorecard-ai/scorecard#1008, which retired the Sim Agents, Endpoints, and Playground surfaces along with endpoint runs and multi-turn simulation.Every call to the helper now 404s, and there is no client-side way to make it work — the simulated-user turn was computed server-side from a Sim Agent's system version, and Sim Agents are gone.
What this removes
src/scorecard_ai/lib/_multi_turn_simulation.pyin full.scorecard_ai.lib:multi_turn_simulation,StopCheck,StopChecks,ChatMessage,ConversationInfo.Nothing else in the package imported that module —
_helpers.pyandwrap_llms.pyare untouched, andrun_and_evaluate/async_run_and_evaluate/wrap*are unaffected.Why removal rather than a deprecation shim
Pinning an older SDK version does not help here: the endpoint is gone server-side, so the helper is dead for every released version, not just this one. A shim that always raises would leave ~300 lines of unreachable code behind for no working upgrade path.
The trade-off is that
from scorecard_ai.lib import ChatMessagenow raisesImportErrorrather than failing at call time.ChatMessagewas aTypedDictofrole/contentdefined inside the multi-turn module and used only by it, so anyone depending on it can replace it with their own two-field dict.Marked
feat!with aBREAKING CHANGE:trailer so release-please cuts a major.Test plan
ruff check src/scorecard_ai/lib/— all checks passed.ruff format --check src/scorecard_ai/lib/— 4 files already formatted.pip install -e .into a clean venv, then importedscorecard_aiandscorecard_ai.lib: both import cleanly,__all__is down to the six surviving names, and none of the five removed names resolve.CHANGELOG.mdentry, left alone.Related
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