docs: simulation tests section for agent tests

[Him188]

Adds a Simulation tests section to the agent tests page: what a simulation test is, how to describe the simulated user, success conditions, tool mocks, assertions, repeat runs and how to read the result.

Also covers the channel a Multi Turn test runs on, expected call counts on required tool calls, the 50 message limit on a seeded conversation, why a broken or timed out conversation is never judged, and that repeats only apply to Run all. It also covers that an unmocked tool fails under Mock all, mocking integration tools (and Confirm write for gated writes), how tools missing from an agent are counted, and what a run error says about its cause. Regular expressions use one dialect, JavaScript, everywhere. It also explains that a run with a missing mock needs review, calling the real endpoint for chosen tools, error entries, entry order, and a note for teams used to unmocked tools calling their real endpoint. Publish after the matching fish-agent release, since the page describes its runtime behavior.

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Summary by CodeRabbit

• Documentation
  • Expanded guidance for configuring and running Single Turn, Tool, and Multi Turn tests, including simulated-user scenarios, channels, success conditions, tool mocks, assertions, repeat runs, and interpreting results and errors.
  • Documented expanded Multi Turn test limits and dynamic-variable behavior.
  • Clarified that Multi Turn tests run on custom endpoints and use their configured channel; Single Turn and Tool tests remain unsupported on custom endpoints.
  • Clarified that mocked tools in Multi Turn tests use the first mock response, while live calls in preview reach the real endpoint.

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Project	Status	Preview	Updated
hanabiaiinc	🟢 Ready	View Preview	Sep 28, 2026, 10:54 AM

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• agents/test/agent-tests.mdx

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📝 Walkthrough

Walkthrough

The test guide now covers Single Turn, Tool, and Multi Turn tests. It describes setup, evaluation, tool behavior, repeated runs, results, and limits. Related build guides clarify Multi Turn endpoint, channel, and mock-response behavior.

Changes

Agent test documentation

Layer / File(s)	Summary
Test types and setup agents/test/agent-tests.mdx	The guide distinguishes the three test types, updates the creation flow, and describes their configuration and evaluation.
Multi Turn configuration and tool behavior agents/test/agent-tests.mdx, agents/build/custom-llm.mdx, agents/build/dynamic-variables.mdx, agents/build/webhook-tools.mdx	The guide describes Multi Turn scenarios, channels, success conditions, tool-mocking strategies, assertions, and repeat behavior. The build guides clarify custom endpoint support, channel values, and mock responses.
Execution, results, and limits agents/test/agent-tests.mdx	The guide covers test removal behavior, individual and batch run results, pass-rate reporting, and test limits.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 2f4bf

The documentation update is mergeable after normal checks; no actionable issue remains in the supplied evidence.

Architecture Summary

Architecture risk: 🔵 Low · up to 2f4bf

The change affects 1 system.

Changed systems: agents

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — agents (service) was modified; 4 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in agents/build/custom-llm.mdx: The limitation now excludes Single Turn and Tool tests specifically and states that Multi Turn tests use the custom endpoint; the scripted-test refusal to substitute a platform model remains.
• observed — Modified behavior in agents/build/dynamic-variables.mdx: The system.channel notes now say Multi Turn tests use their configured channel; Web SDK, API, preview, Single Turn tests, and Tool tests use web_voice, replacing the note that all agent test sessions use web_voice.
• observed — Modified behavior in agents/build/webhook-tools.mdx: The mock-response description now documents that multi-turn agent tests mocking all tools use the first mock response. It removes the statement that mocks do not intercept preview calls; the text still says live calls reach the real endpoint.
• observed — Modified behavior in agents/test/agent-tests.mdx: The description now covers scripted conversations or simulated users, and the introduction adds a test-type overview. It replaces the “How a test works” section with Single Turn, Tool, and Multi Turn summaries, and clarifies that Single Turn and Tool webhook calls make real HTTP requests while Multi Turn tests mock tools by default.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a simulation tests section to the agent tests documentation.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.

Inline comments:
Review comments at @agents/test/agent-tests.mdx:
- Line 112: Update the “Required tool calls” guidance to state that forbidding
matching calls requires setting both the minimum and maximum to zero; setting
only the maximum to zero conflicts with the default minimum of one.

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ℹ️ Review info

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Configuration used: defaults

Review profile: CHILL

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Run ID: bbdd2be0-fc2f-4122-8551-06aba12aff9e

📥 Commits

Reviewing files that changed from the base of the PR and between a28ca2d and 707a63a.

📒 Files selected for processing (4)

• agents/build/custom-llm.mdx
• agents/build/dynamic-variables.mdx
• agents/build/webhook-tools.mdx
• agents/test/agent-tests.mdx

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