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Unlimited agent tool rounds

Agent stages no longer have an artificial cap on tool rounds per input or subagent turns, so agents run until they complete their work or are interrupted.

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  • 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