[bot] Mistral Conversations API (`beta.conversations.start/append/restart`) not instrumented

[braintrust-bot]

Summary

The @mistralai/mistralai TypeScript SDK exposes a beta.conversations resource with six generative execution methods for stateful, multi-turn agent conversations with handoffs. None are instrumented — no channels, no plugin handler, no wrapper proxy, and no auto-instrumentation config. Calls to any beta.conversations.* method produce no Braintrust spans.

The Conversations API is Mistral's new agentic execution surface for server-side managed multi-turn conversations. Unlike the existing agents.complete/agents.stream methods (which are stateless, single-turn agent calls already instrumented in this repo), the Conversations API maintains conversation state server-side and supports multi-agent orchestration with handoffs.

What instrumentation is missing

SDK Method	Description
client.beta.conversations.start()	Create a conversation and run initial completion
client.beta.conversations.append()	Append entries to an existing conversation and run completion
client.beta.conversations.restart()	Restart a conversation from a given entry
client.beta.conversations.startStream()	Create a conversation with streaming response
client.beta.conversations.appendStream()	Append entries with streaming response
client.beta.conversations.restartStream()	Restart a conversation with streaming response

All six are generative execution endpoints — each triggers model inference, runs tool executions server-side, and returns generated responses (or streams of events). They are not CRUD endpoints (the list/get/delete/getHistory/getMessages endpoints are excluded here).

No coverage in any instrumentation layer:

• Wrapper (js/src/wrappers/mistral.ts, lines 76–94): The mistralProxy switch only handles chat, fim, agents, and embeddings. No beta or conversations case.
• Auto-instrumentation config (js/src/auto-instrumentations/configs/mistral.ts): Only defines configs for Chat, Fim, Agents, and Embeddings classes. No config for any Conversations methods.
• Channels (js/src/instrumentation/plugins/mistral-channels.ts): No channel definitions for conversation endpoints.
• Plugin (js/src/instrumentation/plugins/mistral-plugin.ts): No handler for conversation calls.
• Vendor types (js/src/vendor-sdk-types/mistral.ts): MistralClient only declares chat, fim, agents, embeddings. No beta or conversations property.

A grep for conversation across js/src/wrappers/mistral.ts and js/src/instrumentation/plugins/mistral-plugin.ts returns zero matches.

Braintrust docs status

not_found — The Braintrust Mistral integration page at https://www.braintrust.dev/docs/integrations/ai-providers/mistral documents chat completions, FIM, embeddings, agents, audio, and OCR. Conversations are not mentioned.

Upstream references

• Mistral Conversations docs: https://docs.mistral.ai/agents/agents
• Mistral Conversations API endpoints: https://docs.mistral.ai/api/endpoint/beta/conversations
• Mistral TypeScript SDK: https://github.com/mistralai/client-ts — client.beta.conversations resource with start(), append(), restart(), startStream(), appendStream(), restartStream() methods
• API endpoints: POST /v1/conversations (start), POST /v1/conversations/{id} (append), POST /v1/conversations/{id}/restart
• Status: Beta in upstream SDK and API

Precedent in this repo

• Mistral agents.complete and agents.stream are instrumented (stateless single-turn agent calls)
• The Conversations API is the natural evolution providing stateful multi-turn agent orchestration
• Comparable agentic execution surfaces are instrumented for other providers:
  • Claude Agent SDK: agent.query() instrumented
  • Google ADK: Runner.runAsync, BaseAgent.runAsync instrumented
  • Anthropic: beta.messages.toolRunner instrumented

Local files inspected

• js/src/wrappers/mistral.ts — lines 76–94: proxy switch (no beta or conversations case)
• js/src/auto-instrumentations/configs/mistral.ts — full file: no conversations configs
• js/src/instrumentation/plugins/mistral-channels.ts — no conversations channels
• js/src/instrumentation/plugins/mistral-plugin.ts — no conversations handlers
• js/src/vendor-sdk-types/mistral.ts — MistralClient missing beta/conversations
• e2e/scenarios/mistral-instrumentation/scenario.impl.mjs — no conversations test scenarios