feat(sdk): agent recursionLimit option#337
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Expose recursionLimit on agent() and wire it into the graph config (prepareAgentCall), so deep agents can exceed LangGraph's default 25 super-steps. Sourced from the DawnAgent descriptor, mirroring retry. Tests assert it reaches the invoke/stream config and is unset by default. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Adds a
recursionLimitoption toagent()that maps to LangGraph's per-run super-step ceiling (default 25). Deep agents — a coordinator that dispatches subagents and makes many tool calls — can raise the limit instead of aborting withRecursion limit of 25 reached without hitting a stop condition.Surfaced by dogfooding the flagship research demo (coordinator → per-sub-question researcher → many corpus tool calls → synthesize legitimately exceeds 25 steps).
Change (2 files + tests)
packages/sdk/src/agent.ts—recursionLimit?: numberonAgentConfig/DawnAgent, spread in theagent()factory (mirrors the existingretryoption).packages/langchain/src/agent-adapter.ts— inprepareAgentCall, setconfig.recursionLimitfrom the DawnAgent descriptor when present; LangGraph'sPregelreads it. Sourced fromoptions.entry, exactly likeretry.Test plan
packages/langchain/test/agent-adapter.test.ts— 2 new tests: the descriptor'srecursionLimitreaches the graph config; absent by default. (8/8 in the suite.)recursionLimit: 100instead of erroring at 25.🤖 Generated with Claude Code