feat: builtin subagents

[uinstinct]

Description

Add 2 builtin subagents: navigator and code reviewer.

• is added automatically only when anthropic provider is present with a local api key
• also fix tool calls hung in subagent
• fix nested subagent execution
• put subagent tool out of beta

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Checklist

• [] I've read the contributing guide
• [] The relevant docs, if any, have been updated or created
• [] The relevant tests, if any, have been updated or created

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Tests

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Continue Tasks: ❌ 7 failed — View all

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Summary by cubic

Adds built-in Navigator and Generalist subagents (auto-added when using Anthropic with a local API key) and enables the Subagent tool by default. Improves tool result handling in subagents and blocks nested subagent calls.

• New Features

  • Built-in subagents: navigator and generalist; included when Anthropic has a direct API key.
  • Subagent tool is always on; removes the --beta-subagent-tool flag.
  • Refined subagent tool description with dynamic listing of available subagents.

• Bug Fixes

  • Tool call results are recorded in subagents even without ChatHistoryService; no more hangs.
  • Prevents nested subagent invocation with a clear error.

^{Written for commit 96cc2f8. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 8 files

[sestinj]

For now, I think we should still make sure that we have a way to disable sub-agents, even if we have them on by default, just in case we need to roll something back. e.g. CN_DISABLE_SUBAGENTS=1.

[cubic-dev-ai]

1 issue found across 4 files (changes from recent commits).

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="extensions/cli/src/tools/subagent.test.ts">

<violation number="1" location="extensions/cli/src/tools/subagent.test.ts:6">
P2: Mock path no longer matches the imported module path, so getAgentNames/getSubagent won’t be mocked and vi.mocked(...).mockReturnValue may fail or run real logic.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review.}