errors

var (
	ErrNoAgents       = &CrewError{Code: "NO_AGENTS", Message: "crew must have at least one agent"}
	ErrNoTasks        = &CrewError{Code: "NO_TASKS", Message: "crew must have at least one task"}
	ErrAgentNil       = &CrewError{Code: "AGENT_NIL", Message: "task agent cannot be nil"}
	ErrLLMFailed      = &CrewError{Code: "LLM_FAILED", Message: "LLM call failed"}
	ErrMaxIterations  = &CrewError{Code: "MAX_ITER", Message: "agent reached max iterations"}
	ErrMaxRPM         = &CrewError{Code: "MAX_RPM", Message: "rate limit exceeded"}
	ErrInvalidProcess = &CrewError{Code: "INVALID_PROCESS", Message: "unsupported process type"}
	ErrToolFailed     = &CrewError{Code: "TOOL_FAILED", Message: "tool execution failed"}
	ErrGuardrail      = &CrewError{Code: "GUARDRAIL", Message: "output failed guardrail check"}
	ErrTaskFailed     = &CrewError{Code: "TASK_FAILED", Message: "task execution failed"}
	ErrNoMatchingPath = &CrewError{Code: "NO_MATCHING_PATH", Message: "no matching path for task output condition"}
	ErrCycleDetected  = &CrewError{Code: "CYCLE_DETECTED", Message: "flow DAG contains a cycle"}
	// @sk-task production-features#T1.1: sentinel errors for checkpoint (AC-013)
	ErrCheckpointNotFound = &CrewError{Code: "CHECKPOINT_NOT_FOUND", Message: "checkpoint not found"}

	// @sk-task async-crew-execution#T1.2: add sentinel error ErrCrewBusy (AC-010)
	ErrCrewBusy = &CrewError{Code: "CREW_BUSY", Message: "crew is already executing asynchronously"}

	// @sk-task replay-system#T1.1: add sentinel error ErrTaskNotFound (AC-003)
	ErrTaskNotFound = &CrewError{Code: "TASK_NOT_FOUND", Message: "task not found in checkpoint"}

	// @sk-task file-io-tools#T1.1: add sentinel errors ErrPathTraversal and ErrStringNotFound (AC-002, AC-007)
	ErrPathTraversal  = &CrewError{Code: "PATH_TRAVERSAL", Message: "path escapes the allowed root directory"}
	ErrStringNotFound = &CrewError{Code: "STRING_NOT_FOUND", Message: "search string not found in file"}

	// @sk-task conditional-tasks#T1.1: condition evaluation failure sentinel (AC-005, AC-012)
	ErrConditionFailed = &CrewError{Code: "CONDITION_FAILED", Message: "task condition evaluation failed"}
)