diff --git a/CHANGELOG.md b/CHANGELOG.md
index 318949d..f25408a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Change Log
 
+## [3.1.0] - 2026-06-26
+
+### Changed
+
+- Adopted Swift's Approachable Concurrency upcoming-feature flags
+  (`NonisolatedNonsendingByDefault` and `InferIsolatedConformances`),
+  aligning the package's async execution semantics with modern Swift 6
+  defaults. No public API signatures changed: the async `from(string:)`
+  parsers and the `from(xml:)` `AsyncStream` producers behave the same
+  from a caller's perspective.
+- Dropped the now-redundant `@preconcurrency` qualifier from
+  `import RegexBuilder` across all parser files. Sendability of the
+  cached, actor-confined compiled regexes is still provided by the
+  package's `Regex: @retroactive @unchecked Sendable` conformance, which
+  is retained until the standard library conforms `Regex` to `Sendable`
+  itself.
+
 ## [3.0.1] - 2026-05-14
 
 ### Changed
diff --git a/Package.swift b/Package.swift
index 1e882f9..e4213f4 100644
--- a/Package.swift
+++ b/Package.swift
@@ -2,6 +2,11 @@
 
 import PackageDescription
 
+let approachableConcurrency: [SwiftSetting] = [
+  .enableUpcomingFeature("NonisolatedNonsendingByDefault"),
+  .enableUpcomingFeature("InferIsolatedConformances")
+]
+
 let package = Package(
   name: "SwiftMETAR",
   defaultLocalization: "en",
@@ -35,7 +40,8 @@ let package = Package(
     .target(
       name: "SwiftMETAR",
       dependencies: [.product(name: "NumberKit", package: "swift-numberkit")],
-      resources: [.process("Resources")]
+      resources: [.process("Resources")],
+      swiftSettings: approachableConcurrency
     ),
     .target(
       name: "METARFormatting",
@@ -43,11 +49,13 @@ let package = Package(
         "SwiftMETAR",
         .product(name: "BuildableMacro", package: "BuildableMacro")
       ],
-      resources: [.process("Resources")]
+      resources: [.process("Resources")],
+      swiftSettings: approachableConcurrency
     ),
     .testTarget(
       name: "SwiftMETARTests",
-      dependencies: ["SwiftMETAR", "Quick", "Nimble"]
+      dependencies: ["SwiftMETAR", "Quick", "Nimble"],
+      swiftSettings: approachableConcurrency
     ),
     .executableTarget(
       name: "DecodeMETAR",
@@ -55,7 +63,8 @@ let package = Package(
         "SwiftMETAR",
         "METARFormatting",
         .product(name: "ArgumentParser", package: "swift-argument-parser")
-      ]
+      ],
+      swiftSettings: approachableConcurrency
     ),
     .executableTarget(
       name: "DecodeTAF",
@@ -63,14 +72,16 @@ let package = Package(
         "SwiftMETAR",
         "METARFormatting",
         .product(name: "ArgumentParser", package: "swift-argument-parser")
-      ]
+      ],
+      swiftSettings: approachableConcurrency
     ),
     .executableTarget(
       name: "DecodeWindsAloft",
       dependencies: [
         "SwiftMETAR",
         .product(name: "ArgumentParser", package: "swift-argument-parser")
-      ]
+      ],
+      swiftSettings: approachableConcurrency
     )
   ],
   swiftLanguageModes: [.v5, .v6]
diff --git a/Sources/SwiftMETAR/Common/Parsers/ConditionsParser.swift b/Sources/SwiftMETAR/Common/Parsers/ConditionsParser.swift
index ab0063b..d3fd6ad 100644
--- a/Sources/SwiftMETAR/Common/Parsers/ConditionsParser.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/ConditionsParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class ConditionsParser {
   private let coverageRef = Reference<Coverage>()
diff --git a/Sources/SwiftMETAR/Common/Parsers/DateParser.swift b/Sources/SwiftMETAR/Common/Parsers/DateParser.swift
index 10ddc31..707ce5a 100644
--- a/Sources/SwiftMETAR/Common/Parsers/DateParser.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/DateParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class DayHourMinuteParser {
   private let dateRef = Reference<(UInt8, UInt8, UInt8)>()
diff --git a/Sources/SwiftMETAR/Common/Parsers/NumericParsers.swift b/Sources/SwiftMETAR/Common/Parsers/NumericParsers.swift
index 4cd8351..4534396 100644
--- a/Sources/SwiftMETAR/Common/Parsers/NumericParsers.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/NumericParsers.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class FractionParser {
   let ref = Reference<Substring>()
diff --git a/Sources/SwiftMETAR/Common/Parsers/VisibilityParser.swift b/Sources/SwiftMETAR/Common/Parsers/VisibilityParser.swift
index 9ac5f1e..c937e93 100644
--- a/Sources/SwiftMETAR/Common/Parsers/VisibilityParser.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/VisibilityParser.swift
@@ -1,6 +1,6 @@
 import Foundation
 import NumberKit
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class VisibilityParser {
   private let integerParser = IntegerDistanceParser()
diff --git a/Sources/SwiftMETAR/Common/Parsers/WeatherParser.swift b/Sources/SwiftMETAR/Common/Parsers/WeatherParser.swift
index ef321f0..c503a47 100644
--- a/Sources/SwiftMETAR/Common/Parsers/WeatherParser.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/WeatherParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class WeatherParser {
   private let intensityRef = Reference<Weather.Intensity>()
diff --git a/Sources/SwiftMETAR/Common/Parsers/WindParser.swift b/Sources/SwiftMETAR/Common/Parsers/WindParser.swift
index 063c816..a19f2da 100644
--- a/Sources/SwiftMETAR/Common/Parsers/WindParser.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/WindParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class WindParser {
   let directionRef = Reference<DirectionString>()
diff --git a/Sources/SwiftMETAR/Common/Parsers/WindshearParser.swift b/Sources/SwiftMETAR/Common/Parsers/WindshearParser.swift
index 298056b..d255c6f 100644
--- a/Sources/SwiftMETAR/Common/Parsers/WindshearParser.swift
+++ b/Sources/SwiftMETAR/Common/Parsers/WindshearParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class WindshearParser {
   private let heightRef = Reference<UInt16>()
diff --git a/Sources/SwiftMETAR/METAR/Parsers/AltimeterParser.swift b/Sources/SwiftMETAR/METAR/Parsers/AltimeterParser.swift
index 982f707..d3eb897 100644
--- a/Sources/SwiftMETAR/METAR/Parsers/AltimeterParser.swift
+++ b/Sources/SwiftMETAR/METAR/Parsers/AltimeterParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class AltimeterParser {
   private let unitRef = Reference<Substring>()
diff --git a/Sources/SwiftMETAR/METAR/Parsers/METARTemperatureParser.swift b/Sources/SwiftMETAR/METAR/Parsers/METARTemperatureParser.swift
index b1aac23..cf5064a 100644
--- a/Sources/SwiftMETAR/METAR/Parsers/METARTemperatureParser.swift
+++ b/Sources/SwiftMETAR/METAR/Parsers/METARTemperatureParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class METARTemperatureParser {
   private let tempParser = AlphaSignedIntegerParser(width: 2)
diff --git a/Sources/SwiftMETAR/METAR/Parsers/RVRParser.swift b/Sources/SwiftMETAR/METAR/Parsers/RVRParser.swift
index 83b5d9b..7bfb35f 100644
--- a/Sources/SwiftMETAR/METAR/Parsers/RVRParser.swift
+++ b/Sources/SwiftMETAR/METAR/Parsers/RVRParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class RVRParser {
   private let runwayRef = Reference<Substring>()
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/RemarkDirectionParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/RemarkDirectionParser.swift
index 39e3921..e5284bb 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/RemarkDirectionParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/RemarkDirectionParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class RemarkDirectionParser {
   private static let directionFromString: [String: Remark.Direction] = [
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/RemarkParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/RemarkParser.swift
index c9b7a3d..d3e1f65 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/RemarkParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/RemarkParser.swift
@@ -1,6 +1,6 @@
 import Foundation
 import NumberKit
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 protocol RemarkParser {
   var urgency: Remark.Urgency { get }
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/AircraftMishapParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/AircraftMishapParser.swift
index f5a69de..cf4ede3 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/AircraftMishapParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/AircraftMishapParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class AircraftMishapParser: RemarkParser {
   private static let rx = Regex {
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/CloudTypesParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/CloudTypesParser.swift
index 98051fe..00dcdd4 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/CloudTypesParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/CloudTypesParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class CloudTypesParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/CorrectionParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/CorrectionParser.swift
index 3dba48f..5febb66 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/CorrectionParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/CorrectionParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class CorrectionParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyPrecipitationAmountParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyPrecipitationAmountParser.swift
index fa7e85a..74b476b 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyPrecipitationAmountParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyPrecipitationAmountParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class DailyPrecipitationAmountParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyTemperatureExtremeParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyTemperatureExtremeParser.swift
index 425b8c5..049e72c 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyTemperatureExtremeParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/DailyTemperatureExtremeParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class DailyTemperatureExtremeParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/HailstoneSizeParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/HailstoneSizeParser.swift
index 067e953..c4e0a6f 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/HailstoneSizeParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/HailstoneSizeParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class HailstoneSizeParser: RemarkParser {
   var urgency = Remark.Urgency.urgent
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/HourlyPrecipitationAmountParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/HourlyPrecipitationAmountParser.swift
index 03e0664..9077a53 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/HourlyPrecipitationAmountParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/HourlyPrecipitationAmountParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class HourlyPrecipitationAmountParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/LastParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/LastParser.swift
index 5b00f6d..996d427 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/LastParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/LastParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class LastParser: RemarkParser {
   private static let rx = Regex {
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/LightningParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/LightningParser.swift
index f77b3a2..9403e7c 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/LightningParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/LightningParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class LightningParser: RemarkParser {
   var urgency = Remark.Urgency.urgent
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/MaintenanceParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/MaintenanceParser.swift
index a3f9e5b..97e6536 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/MaintenanceParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/MaintenanceParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class MaintenanceParser: RemarkParser {
   private static let rx = Regex {
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/NOSIGParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/NOSIGParser.swift
index a078c22..83aedb2 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/NOSIGParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/NOSIGParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class NOSIGParser: RemarkParser {
   private static let rx = Regex {
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/NavalForecasterParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/NavalForecasterParser.swift
index b2d3742..353d9a9 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/NavalForecasterParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/NavalForecasterParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class NavalForecasterParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/NextParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/NextParser.swift
index 320de92..f0ecf37 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/NextParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/NextParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class NextParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/NoAmendmentsAfterParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/NoAmendmentsAfterParser.swift
index b45c1d2..0f17fcd 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/NoAmendmentsAfterParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/NoAmendmentsAfterParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class NoAmendmentsAfterParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/NoSPECIParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/NoSPECIParser.swift
index d9c7088..6678b88 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/NoSPECIParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/NoSPECIParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class NoSPECIParser: RemarkParser {
   private static let rx = Regex {
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObscurationParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObscurationParser.swift
index 6899c47..aab3060 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObscurationParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObscurationParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class ObscurationParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservationTypeParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservationTypeParser.swift
index 428b158..4c1e9c6 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservationTypeParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservationTypeParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class ObservationTypeParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedPrecipitationParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedPrecipitationParser.swift
index 4a7bfe6..e559158 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedPrecipitationParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedPrecipitationParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class ObservedPrecipitationParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedVisibilityParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedVisibilityParser.swift
index 53ad0e7..ba5a35c 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedVisibilityParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/ObservedVisibilityParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class ObservedVisibilityParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/PeakWindsParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/PeakWindsParser.swift
index da70349..2d331c6 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/PeakWindsParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/PeakWindsParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class PeakWindsParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicIceAccretionAmountParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicIceAccretionAmountParser.swift
index a9b6223..d4a6d07 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicIceAccretionAmountParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicIceAccretionAmountParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class PeriodicIceAccretionAmountParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicPrecipitationAmountParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicPrecipitationAmountParser.swift
index 100f5ef..eef5d06 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicPrecipitationAmountParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/PeriodicPrecipitationAmountParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class PeriodicPrecipitationAmountParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/PrecipitationBeginEndParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/PrecipitationBeginEndParser.swift
index 7e57e66..288374d 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/PrecipitationBeginEndParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/PrecipitationBeginEndParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class PrecipitationBeginEndParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/PressureTendencyParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/PressureTendencyParser.swift
index 895a143..cac2c4c 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/PressureTendencyParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/PressureTendencyParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class PressureTendencyParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidPressureChangeParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidPressureChangeParser.swift
index da88646..d328afb 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidPressureChangeParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidPressureChangeParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class RapidPressureChangeParser: RemarkParser {
   var urgency = Remark.Urgency.caution
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidSnowIncreaseParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidSnowIncreaseParser.swift
index 7305869..3d388cd 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidSnowIncreaseParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/RapidSnowIncreaseParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class RapidSnowIncreaseParser: RemarkParser {
   var urgency = Remark.Urgency.caution
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/RelativeHumidityParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/RelativeHumidityParser.swift
index a7a7f4f..298a372 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/RelativeHumidityParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/RelativeHumidityParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class RelativeHumidityParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayCeilingParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayCeilingParser.swift
index 96e62ff..e770e0f 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayCeilingParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayCeilingParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class RunwayCeilingParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayVisibilityParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayVisibilityParser.swift
index 80ddc00..620f2b2 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayVisibilityParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/RunwayVisibilityParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class RunwayVisibilityParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SeaLevelPressureParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SeaLevelPressureParser.swift
index aac2a98..f726980 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SeaLevelPressureParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SeaLevelPressureParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SeaLevelPressureParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SectorVisibilityParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SectorVisibilityParser.swift
index c33f4f4..db8bda9 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SectorVisibilityParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SectorVisibilityParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SectorVisibilityParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SensorStatusParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SensorStatusParser.swift
index dbef965..6b2545f 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SensorStatusParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SensorStatusParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SensorStatusParser: RemarkParser {
   var urgency = Remark.Urgency.caution
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SignificantCloudsParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SignificantCloudsParser.swift
index 5ff979a..ce3a9df 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SignificantCloudsParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SignificantCloudsParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SignificantCloudsParser: RemarkParser {
   var urgency = Remark.Urgency.caution
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SixHourTemperatureExtremeParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SixHourTemperatureExtremeParser.swift
index 01bd081..f65b89e 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SixHourTemperatureExtremeParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SixHourTemperatureExtremeParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SixHourTemperatureExtremeParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SnowDepthParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SnowDepthParser.swift
index f1035b6..3029b16 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SnowDepthParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SnowDepthParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SnowDepthParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/SunshineDurationParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/SunshineDurationParser.swift
index 807a246..682ea96 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/SunshineDurationParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/SunshineDurationParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class SunshineDurationParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/TemperatureDewpointParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/TemperatureDewpointParser.swift
index 05aff47..2b0d86e 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/TemperatureDewpointParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/TemperatureDewpointParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class TemperatureDewpointParser: RemarkParser {
   private static let indeterminate = "////"
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormBeginEndParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormBeginEndParser.swift
index 7ba85d5..2fe52af 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormBeginEndParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormBeginEndParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class ThunderstormBeginEndParser: RemarkParser {
   var urgency = Remark.Urgency.caution
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormLocationParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormLocationParser.swift
index a864768..b8b6055 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormLocationParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/ThunderstormLocationParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class ThunderstormLocationParser: RemarkParser {
   var urgency = Remark.Urgency.urgent
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/TornadicActivityParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/TornadicActivityParser.swift
index a36d00b..79b4d24 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/TornadicActivityParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/TornadicActivityParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class TornadicActivityParser: RemarkParser {
   var urgency = Remark.Urgency.urgent
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableCeilingHeightParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableCeilingHeightParser.swift
index 7cf75d4..1139bc8 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableCeilingHeightParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableCeilingHeightParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class VariableCeilingHeightParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariablePrevailingVisibilityParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariablePrevailingVisibilityParser.swift
index 2b059de..2244e6d 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariablePrevailingVisibilityParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariablePrevailingVisibilityParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class VariablePrevailingVisibilityParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableSkyConditionParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableSkyConditionParser.swift
index 6d52514..f4decfb 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableSkyConditionParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableSkyConditionParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class VariableSkyConditionParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableWindDirectionParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableWindDirectionParser.swift
index e338fd6..3ca6345 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableWindDirectionParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/VariableWindDirectionParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class VariableWindDirectionParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/WaterEquivalentDepthParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/WaterEquivalentDepthParser.swift
index 73ff599..7897554 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/WaterEquivalentDepthParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/WaterEquivalentDepthParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class WaterEquivalentDepthParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/WindChangeParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/WindChangeParser.swift
index 07ce81a..a4b7826 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/WindChangeParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/WindChangeParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class WindChangeParser: RemarkParser {
   var urgency = Remark.Urgency.routine
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/WindDataEstimatedParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/WindDataEstimatedParser.swift
index 47e8478..798e84d 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/WindDataEstimatedParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/WindDataEstimatedParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class WindDataEstimatedParser: RemarkParser {
   private static let rx = Regex {
diff --git a/Sources/SwiftMETAR/Remarks/Parsers/Types/WindShiftParser.swift b/Sources/SwiftMETAR/Remarks/Parsers/Types/WindShiftParser.swift
index 4b0c2cd..7c2d186 100644
--- a/Sources/SwiftMETAR/Remarks/Parsers/Types/WindShiftParser.swift
+++ b/Sources/SwiftMETAR/Remarks/Parsers/Types/WindShiftParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 final class WindShiftParser: RemarkParser {
   var urgency = Remark.Urgency.caution
diff --git a/Sources/SwiftMETAR/Support/Regex+Sendable.swift b/Sources/SwiftMETAR/Support/Regex+Sendable.swift
index 9c8163c..a02d2cc 100644
--- a/Sources/SwiftMETAR/Support/Regex+Sendable.swift
+++ b/Sources/SwiftMETAR/Support/Regex+Sendable.swift
@@ -1,3 +1,7 @@
+// `Regex` is not yet `Sendable` in the standard library, but the parser actors cache
+// compiled regexes in immutable stored properties and only ever match against them inside
+// their own isolation domain, so sharing them is safe. The `@retroactive` annotation marks
+// this conformance for removal once the stdlib conforms `Regex` to `Sendable` itself.
 extension Regex: @retroactive @unchecked Sendable {
   func matches(_ string: String) throws -> Bool {
     try wholeMatch(in: string) != nil
diff --git a/Sources/SwiftMETAR/TAF/Parsers/IcingParser.swift b/Sources/SwiftMETAR/TAF/Parsers/IcingParser.swift
index 8c41646..9abdbdd 100644
--- a/Sources/SwiftMETAR/TAF/Parsers/IcingParser.swift
+++ b/Sources/SwiftMETAR/TAF/Parsers/IcingParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class IcingParser {
   private let typeRef = Reference<Icing.IcingType?>()
diff --git a/Sources/SwiftMETAR/TAF/Parsers/PeriodParser.swift b/Sources/SwiftMETAR/TAF/Parsers/PeriodParser.swift
index db8f43a..bd33612 100644
--- a/Sources/SwiftMETAR/TAF/Parsers/PeriodParser.swift
+++ b/Sources/SwiftMETAR/TAF/Parsers/PeriodParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class PeriodParser {
   func parse(_ parts: inout [String.SubSequence], referenceDate: Date? = nil) throws -> TAF.Group
diff --git a/Sources/SwiftMETAR/TAF/Parsers/TAFTemperatureParser.swift b/Sources/SwiftMETAR/TAF/Parsers/TAFTemperatureParser.swift
index f25eec2..ee34310 100644
--- a/Sources/SwiftMETAR/TAF/Parsers/TAFTemperatureParser.swift
+++ b/Sources/SwiftMETAR/TAF/Parsers/TAFTemperatureParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class TAFTemperatureParser {
   private let typeRef = Reference<TAF.Temperature.TemperatureType?>()
diff --git a/Sources/SwiftMETAR/TAF/Parsers/TurbulenceParser.swift b/Sources/SwiftMETAR/TAF/Parsers/TurbulenceParser.swift
index 6591c56..5d9761c 100644
--- a/Sources/SwiftMETAR/TAF/Parsers/TurbulenceParser.swift
+++ b/Sources/SwiftMETAR/TAF/Parsers/TurbulenceParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class TurbulenceParser {
   private let typeRef = Reference<Character>()
diff --git a/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftDataGroupParser.swift b/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftDataGroupParser.swift
index 8225a28..5cff28c 100644
--- a/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftDataGroupParser.swift
+++ b/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftDataGroupParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class WindsAloftDataGroupParser {
 
diff --git a/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftHeaderParser.swift b/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftHeaderParser.swift
index aeca6b9..b123319 100644
--- a/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftHeaderParser.swift
+++ b/Sources/SwiftMETAR/WindsAloft/Parsers/WindsAloftHeaderParser.swift
@@ -1,5 +1,5 @@
 import Foundation
-@preconcurrency import RegexBuilder
+import RegexBuilder
 
 class WindsAloftHeaderParser {