diff --git a/errors.go b/errors.go
index 502509b9a..829730fec 100644
--- a/errors.go
+++ b/errors.go
@@ -7,38 +7,68 @@ import (
 )
 
 type (
-	TransportError          = qerr.TransportError
-	ApplicationError        = qerr.ApplicationError
+	// TransportError indicates an error that occurred on the QUIC transport layer.
+	// Every transport error other than CONNECTION_REFUSED and APPLICATION_ERROR is
+	// likely a bug in the implementation.
+	TransportError = qerr.TransportError
+	// ApplicationError is an application-defined error.
+	ApplicationError = qerr.ApplicationError
+	// VersionNegotiationError indicates a failure to negotiate a QUIC version.
 	VersionNegotiationError = qerr.VersionNegotiationError
-	StatelessResetError     = qerr.StatelessResetError
-	IdleTimeoutError        = qerr.IdleTimeoutError
-	HandshakeTimeoutError   = qerr.HandshakeTimeoutError
+	// StatelessResetError indicates a stateless reset was received.
+	// This can happen when the peer reboots, or when packets are misrouted.
+	// See section 10.3 of RFC 9000 for details.
+	StatelessResetError = qerr.StatelessResetError
+	// IdleTimeoutError indicates that the connection timed out because it was inactive for too long.
+	IdleTimeoutError = qerr.IdleTimeoutError
+	// HandshakeTimeoutError indicates that the connection timed out before completing the handshake.
+	HandshakeTimeoutError = qerr.HandshakeTimeoutError
 )
 
 type (
-	TransportErrorCode   = qerr.TransportErrorCode
+	// TransportErrorCode is a QUIC transport error code, see section 20 of RFC 9000.
+	TransportErrorCode = qerr.TransportErrorCode
+	// ApplicationErrorCode is an QUIC application error code.
 	ApplicationErrorCode = qerr.ApplicationErrorCode
-	StreamErrorCode      = qerr.StreamErrorCode
+	// StreamErrorCode is a QUIC stream error code. The meaning of the value is defined by the application.
+	StreamErrorCode = qerr.StreamErrorCode
 )
 
 const (
-	NoError                   = qerr.NoError
-	InternalError             = qerr.InternalError
-	ConnectionRefused         = qerr.ConnectionRefused
-	FlowControlError          = qerr.FlowControlError
-	StreamLimitError          = qerr.StreamLimitError
-	StreamStateError          = qerr.StreamStateError
-	FinalSizeError            = qerr.FinalSizeError
-	FrameEncodingError        = qerr.FrameEncodingError
-	TransportParameterError   = qerr.TransportParameterError
-	ConnectionIDLimitError    = qerr.ConnectionIDLimitError
-	ProtocolViolation         = qerr.ProtocolViolation
-	InvalidToken              = qerr.InvalidToken
+	// NoError is the NO_ERROR transport error code.
+	NoError = qerr.NoError
+	// InternalError is the INTERNAL_ERROR transport error code.
+	InternalError = qerr.InternalError
+	// ConnectionRefused is the CONNECTION_REFUSED transport error code.
+	ConnectionRefused = qerr.ConnectionRefused
+	// FlowControlError is the FLOW_CONTROL_ERROR transport error code.
+	FlowControlError = qerr.FlowControlError
+	// StreamLimitError is the STREAM_LIMIT_ERROR transport error code.
+	StreamLimitError = qerr.StreamLimitError
+	// StreamStateError is the STREAM_STATE_ERROR transport error code.
+	StreamStateError = qerr.StreamStateError
+	// FinalSizeError is the FINAL_SIZE_ERROR transport error code.
+	FinalSizeError = qerr.FinalSizeError
+	// FrameEncodingError is the FRAME_ENCODING_ERROR transport error code.
+	FrameEncodingError = qerr.FrameEncodingError
+	// TransportParameterError is the TRANSPORT_PARAMETER_ERROR transport error code.
+	TransportParameterError = qerr.TransportParameterError
+	// ConnectionIDLimitError is the CONNECTION_ID_LIMIT_ERROR transport error code.
+	ConnectionIDLimitError = qerr.ConnectionIDLimitError
+	// ProtocolViolation is the PROTOCOL_VIOLATION transport error code.
+	ProtocolViolation = qerr.ProtocolViolation
+	// InvalidToken is the INVALID_TOKEN transport error code.
+	InvalidToken = qerr.InvalidToken
+	// ApplicationErrorErrorCode is the APPLICATION_ERROR transport error code.
 	ApplicationErrorErrorCode = qerr.ApplicationErrorErrorCode
-	CryptoBufferExceeded      = qerr.CryptoBufferExceeded
-	KeyUpdateError            = qerr.KeyUpdateError
-	AEADLimitReached          = qerr.AEADLimitReached
-	NoViablePathError         = qerr.NoViablePathError
+	// CryptoBufferExceeded is the CRYPTO_BUFFER_EXCEEDED transport error code.
+	CryptoBufferExceeded = qerr.CryptoBufferExceeded
+	// KeyUpdateError is the KEY_UPDATE_ERROR transport error code.
+	KeyUpdateError = qerr.KeyUpdateError
+	// AEADLimitReached is the AEAD_LIMIT_REACHED transport error code.
+	AEADLimitReached = qerr.AEADLimitReached
+	// NoViablePathError is the NO_VIABLE_PATH_ERROR transport error code.
+	NoViablePathError = qerr.NoViablePathError
 )
 
 // A StreamError is used to signal stream cancellations.