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Unlimited agent tool rounds

Agent stages no longer have an artificial cap on tool rounds per input or subagent turns. Previously, the default limits could cause agents to stop mid-task on complex operations. Both max_tool_rounds_per_input and subagent max_turns now default to unlimited, so agents run until they complete their work or hit the context window.

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More

  • Condition expressions now support quoted strings: edge [label="status == \"ready\""]
  • "end" and "End" are now recognized as exit node identifiers alongside "END"
  • Edge selection now falls back to the default edge when no condition matches, instead of erroring
  • default_max_retries attribute renamed to max_retries on graph-level stylesheets
  • Removed error_policy and k_of_n/quorum attributes from parallel nodes — parallel stages now always wait for all branches
  • Subagents are now automatically cleaned up when a session closes, preventing orphaned background processes
  • All 5xx HTTP status codes from LLM providers are now classified as retryable server errors
  • Request timeouts from LLM providers are now treated as non-retryable by default to avoid redundant retries on slow requests
  • Fixed workflow slug lookup failing for split and resumed runs
  • Fixed split run metadata being lost across engine restarts
  • Fixed split run lifecycle lookup returning stale state