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AgentError

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pub(all) suberror AgentError {
  Model(String)
  Session(SessionError)
  Runtime(RuntimeError)
  ToolLoopExceeded(consumed~ : Int, limit~ : Int)
  PipelineAborted(String)
} derive(
Debug)

impl Show for AgentError

CommandError

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pub(all) suberror CommandError {
  NotFound(String)
  InvalidArgs(reason~ : String)
  ExecutionFailed(String)
} derive(
Debug)

Errors raised by CommandPort.invoke: unknown command id, invalid args, or execution failure.

CompositionError

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pub(all) suberror CompositionError {
  ToolCollision(String, String, manifests~ : Array[String])
  CommandCollision(String, manifests~ : Array[String])
  MissingModel
  MultipleModels(manifests~ : Array[String])
  EmptyManifests
  ManifestSchemaError(manifest_id~ : String, detail~ : String)
  EmptyPort(String)
  ExtensionComposeFailed(manifest_id~ : String, detail~ : String)
} derive(
Debug)

Composition errors raised during Agent::new (manifest aggregation failures).

Every variant that involves a specific extension carries manifest_id so callers can locate the offending extension without guessing. Multi-party collisions carry the list of involved manifest ids.

MemoryError

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pub(all) suberror MemoryError {
  Store(String)
  Search(String)
  Delete(String)
} derive(
Debug)

impl Show for MemoryError

ModelError

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pub(all) suberror ModelError {
  RequestBuild(String)
  Transport(String)
  ResponseParse(String)
  RateLimited(RateLimitInfo)
} derive(
Debug)

impl Show for ModelError

RuntimeError

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pub(all) suberror RuntimeError {
  UnknownTool(String)
  InvocationFailed(String)
  Transport(String)
  ToolAlreadyRegistered(String)
} derive(
Debug)

RuntimeError::to_string

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fn RuntimeError::to_string(self : RuntimeError) -> String

SessionError

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pub(all) suberror SessionError {
  Load(String)
  Save(String)
} derive(
Debug)

SessionError::to_string

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fn SessionError::to_string(self : SessionError) -> String

UiError

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pub(all) suberror UiError {
  Unsupported(detail~ : String)
  Cancelled
  InvalidRequest(detail~ : String)
  IoFailure(detail~ : String)
} derive(
Debug)

Errors raised by UiPort implementations. UiPort::request MUST raise one of these typed variants instead of an untyped error, so that callers can distinguish "user cancelled" from "this UI doesn't support requests".
impl Show for UiError

RateLimitInfo

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pub(all) struct RateLimitInfo {
  status : Int
  message : String
  reset_at_ms : Int64?
  provider_code : String?
} derive(Eq, 
Debug)

Structured quota/rate-limit verdict returned by a provider (the HTTP 429 family). Raised as ModelError::RateLimited instead of Transport so hosts can schedule recovery from typed data instead of parsing strings.

reset_at_ms is the Unix epoch in milliseconds at which the provider stated the quota window frees; None means no explicit reset time was stated, so waiting is not schedulable and the caller should treat the verdict as terminal for this turn. provider_code is the provider's own machine code for the verdict when available (for example z.ai "1308", OpenAI "usage_limit_reached"). message is a bounded excerpt of the provider message, safe to display.

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