Enum AgentError 

pub enum AgentError {
    Model(ModelError),
    Capability(String),
    Cancelled {
        reason: String,
    },
    CapabilityOrder(CapabilityOrderError),
    StructuredOutput(String),
    DynamicInstruction(String),
    OutputRetryLimitExceeded {
        retries: usize,
    },
    ToolRetryLimitExceeded {
        tool: String,
        max_retries: usize,
    },
    StepLimitExceeded {
        steps: usize,
    },
    UsageLimit(UsageLimitError),
    ExecutionSuspended {
        node: AgentExecutionNode,
        reason: String,
    },
    Executor(AgentExecutorError),
    ToolCallsRequireTools,
}

Bare agent runtime error.

Variants

Model(ModelError)

Model adapter failed.

Capability(String)

Capability hook failed.

Cancelled

Runtime execution was cancelled cooperatively.

Fields

reason: String

Human-readable cancellation reason.

CapabilityOrder(CapabilityOrderError)

Capability ordering failed.

StructuredOutput(String)

Structured output parsing failed.

DynamicInstruction(String)

Dynamic instruction generation failed.

OutputRetryLimitExceeded

Output retry budget was exceeded.

Fields

retries: usize

Retry count.

ToolRetryLimitExceeded

Tool retry budget was exceeded.

Fields

tool: String

Tool name.

max_retries: usize

Retry limit for this tool.

StepLimitExceeded

Maximum step count was exceeded.

Fields

steps: usize

Step count.

UsageLimit(UsageLimitError)

Usage limit was exceeded.

ExecutionSuspended

Execution was suspended at a durable checkpoint.

Fields

node: AgentExecutionNode

Suspended execution node.

reason: String

Suspend reason.

Executor(AgentExecutorError)

Durable executor failed.

ToolCallsRequireTools

Model returned tool calls before tool execution exists in this bare runtime.

Implementations

impl AgentError

pub const fn public_code(&self) -> &'static str

Return the stable category safe for durable and client-visible surfaces.

pub fn public_message(&self) -> String

Return a diagnostic safe for durable events and client-visible surfaces.

Free-form provider, capability, instruction, executor, and cancellation details are intentionally omitted because they can contain request content, credentials, or host internals. The original typed error remains available to local callers and telemetry.

Trait Implementations

impl Debug for AgentError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for AgentError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for AgentError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<AgentExecutorError> for AgentError

fn from(source: AgentExecutorError) -> Self

Converts to this type from the input type.

impl From<CapabilityOrderError> for AgentError

fn from(source: CapabilityOrderError) -> Self

Converts to this type from the input type.

impl From<ModelError> for AgentError

fn from(source: ModelError) -> Self

Converts to this type from the input type.

impl From<UsageLimitError> for AgentError

fn from(source: UsageLimitError) -> Self

Converts to this type from the input type.