Error Classes

Error Hierarchy

Error
├── ConnectorError
├── OperationError
├── AbortError
├── TimeoutError
├── ExecError
└── AggregateError
    └── ApplyError

---

ConnectorError

Transport-level failures — connection refused, authentication failure, etc.

import { ConnectorError } from 'sysopkit';

class ConnectorError extends Error {
  name: 'ConnectorError';
  constructor(message: string, conn: Connector);
}

Property	Type	Description
conn	Connector	The connector that failed

---

OperationError

Operation-specific failures wrapping an underlying cause.

import { OperationError } from 'sysopkit';

class OperationError extends Error {
  name: 'OperationError';
  constructor(message: string, cause?: Error);
}

Property	Type	Description
cause	Error | undefined	The underlying error

---

AbortError

Execution was cancelled via AbortSignal. Use isAbortError() to check safely across realm boundaries.

import { AbortError, isAbortError } from 'sysopkit';

class AbortError extends Error {
  name: 'AbortError';
  constructor(message?: string); // default: 'Aborted'
}

function isAbortError(err: unknown): boolean;

---

TimeoutError

Operation exceeded the time limit set by timeout().

import { TimeoutError } from 'sysopkit';

class TimeoutError extends Error {
  name: 'TimeoutError';
  constructor(message?: string);
}

---

ExecError

Command execution failure. Carries the command, exit code, and full output.

import { ExecError } from 'sysopkit';

class ExecError extends Error {
  name: 'ExecError';
  constructor(message: string, cmd: string[], exitCode: number, stdout: string, stderr: string);
}

Property	Type	Description
cmd	string[]	The command that failed
exitCode	number	Process exit code
stdout	string	Full stdout output
stderr	string	Full stderr output

---

ApplyError

Multi-host apply failures. Extends AggregateError with per-host results.

import { ApplyError } from 'sysopkit';

class ApplyError<R = unknown> extends AggregateError {
  name: 'ApplyError';
  constructor(errors: unknown[], message: string, results: ApplyResult<R>[]);
}

Property	Type	Description
results	ApplyResult<R>[]	Per-host success/failure results

type ApplyResult<T> = ApplySuccess<T> | ApplyFailure;

interface ApplySuccess<T> {
  success: true;
  conn: Connector;
  result: T;
}

interface ApplyFailure {
  success: false;
  conn: Connector;
  error: unknown;
}

---

ShellError

Thrown by sh() and bash() operations for non-zero exit codes outside the 64-78 BSD usage error range.

import { ShellError } from 'sysopkit/op/sh';

class ShellError extends ExecError {
  // inherits cmd, exitCode, stdout, stderr from ExecError
}