Add stopWhen property to DurableAgent

[Copilot]

DurableAgent now supports stopWhen for controlling agent execution, matching AI SDK 6's ToolLoopAgent interface for portability.

Implementation

• DurableAgent: Added stopWhen to constructor options and stream() method, accepting StopCondition<ToolSet> or arrays
• Step tracking: Builds StepResult objects from tool calls/results to pass to condition evaluators
• Safe parsing: Added safeJsonParse() to handle invalid JSON in tool inputs/outputs without crashing
• Type exports: Re-exported StopCondition, StepResult, stepCountIs, hasToolCall from @workflow/ai for convenience

Usage

import { DurableAgent } from '@workflow/ai/agent';
import { stepCountIs, hasToolCall } from '@workflow/ai';

const agent = new DurableAgent({
  model: 'anthropic/claude-opus',
  tools: { getWeather: { /* ... */ } },
  stopWhen: stepCountIs(10), // Stop after 10 steps
});

// Or override per-stream
await agent.stream({
  messages: [{ role: 'user', content: 'What is the weather?' }],
  stopWhen: [stepCountIs(5), hasToolCall('getWeather')], // Stop on either condition
});

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fonts.googleapis.com
  • Triggering command: /usr/local/bin/node /home/REDACTED/work/workflow/workflow/node_modules/.pnpm/next@15.5.4_@opentelemetry+api@1.9.0_react-dom@19.1.0_react@19.1.0__react@19.1.0/node_modules/next/dist/compiled/jest-worker/processChild.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

the DurableAgent class in workflow/ai package is meant to be very similar in interface to the ToolLoopAgent class in AI sdk 6. One of the things it's missing is the stopWhen property. Implement that and ensure it is compatible with the same options/types as the AI sdk version for easy portability

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[changeset-bot]

🦋 Changeset detected

Latest commit: 163acc9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@workflow/ai	Patch

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