chore: Laviolette Bridge 3.22.0 changelog.

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "submodules/vcpkg"]
 	path = extern/vcpkg
 	url = https://github.com/Microsoft/vcpkg.git
+[submodule "extern/vcpkg-windows"]
+	path = extern/vcpkg-windows
+	url = https://github.com/microsoft/vcpkg.git

COPYING_NOTES.md

@@ -42,7 +42,10 @@ Proton Mail Bridge includes the following 3rd party software:
 * [go-smtp](https://github.com/emersion/go-smtp) available under [license](https://github.com/emersion/go-smtp/blob/master/LICENSE) 
 * [go-vcard](https://github.com/emersion/go-vcard) available under [license](https://github.com/emersion/go-vcard/blob/master/LICENSE) 
 * [color](https://github.com/fatih/color) available under [license](https://github.com/fatih/color/blob/master/LICENSE) 
+* [cbor](https://github.com/fxamacker/cbor/v2) available under [license](https://github.com/fxamacker/cbor/v2/blob/master/LICENSE) 
 * [sentry-go](https://github.com/getsentry/sentry-go) available under [license](https://github.com/getsentry/sentry-go/blob/master/LICENSE) 
+* [ctaphid](https://github.com/go-ctap/ctaphid) available under [license](https://github.com/go-ctap/ctaphid/blob/master/LICENSE) 
+* [winhello](https://github.com/go-ctap/winhello) available under [license](https://github.com/go-ctap/winhello/blob/master/LICENSE) 
 * [resty](https://github.com/go-resty/resty/v2) available under [license](https://github.com/go-resty/resty/v2/blob/master/LICENSE) 
 * [dbus](https://github.com/godbus/dbus) available under [license](https://github.com/godbus/dbus/blob/master/LICENSE) 
 * [mock](https://github.com/golang/mock) available under [license](https://github.com/golang/mock/blob/master/LICENSE) 
@@ -52,6 +55,7 @@ Proton Mail Bridge includes the following 3rd party software:
 * [html2text](https://github.com/jaytaylor/html2text) available under [license](https://github.com/jaytaylor/html2text/blob/master/LICENSE) 
 * [go-locale](https://github.com/jeandeaual/go-locale) available under [license](https://github.com/jeandeaual/go-locale/blob/master/LICENSE) 
 * [go-keychain](https://github.com/keybase/go-keychain) available under [license](https://github.com/keybase/go-keychain/blob/master/LICENSE) 
+* [go-libfido2](https://github.com/keys-pub/go-libfido2) available under [license](https://github.com/keys-pub/go-libfido2/blob/master/LICENSE) 
 * [dns](https://github.com/miekg/dns) available under [license](https://github.com/miekg/dns/blob/master/LICENSE) 
 * [memory](https://github.com/pbnjay/memory) available under [license](https://github.com/pbnjay/memory/blob/master/LICENSE) 
 * [errors](https://github.com/pkg/errors) available under [license](https://github.com/pkg/errors/blob/master/LICENSE) 
@@ -70,7 +74,6 @@ Proton Mail Bridge includes the following 3rd party software:
 * [grpc](https://google.golang.org/grpc) available under [license](https://github.com/grpc/grpc-go/blob/master/LICENSE) 
 * [protobuf](https://google.golang.org/protobuf) available under [license](https://github.com/protocolbuffers/protobuf/blob/main/LICENSE) 
 * [plist](https://howett.net/plist) available under [license](https://github.com/DHowett/go-plist/blob/main/LICENSE) 
-* [compute](https://cloud.google.com/go/compute) available under [license](https://pkg.go.dev/cloud.google.com/go/compute?tab=licenses) 
 * [metadata](https://cloud.google.com/go/compute/metadata) available under [license](https://pkg.go.dev/cloud.google.com/go/compute/metadata?tab=licenses) 
 * [bcrypt](https://github.com/ProtonMail/bcrypt) available under [license](https://github.com/ProtonMail/bcrypt/blob/master/LICENSE) 
 * [go-crypto](https://github.com/ProtonMail/go-crypto) available under [license](https://github.com/ProtonMail/go-crypto/blob/master/LICENSE) 
@@ -111,6 +114,7 @@ Proton Mail Bridge includes the following 3rd party software:
 * [multierror](https://github.com/joeshaw/multierror) available under [license](https://github.com/joeshaw/multierror/blob/master/LICENSE) 
 * [go](https://github.com/json-iterator/go) available under [license](https://github.com/json-iterator/go/blob/master/LICENSE) 
 * [cpuid](https://github.com/klauspost/cpuid/v2) available under [license](https://github.com/klauspost/cpuid/v2/blob/master/LICENSE) 
+* [cose](https://github.com/ldclabs/cose) available under [license](https://github.com/ldclabs/cose/blob/master/LICENSE) 
 * [go-urn](https://github.com/leodido/go-urn) available under [license](https://github.com/leodido/go-urn/blob/master/LICENSE) 
 * [go-colorable](https://github.com/mattn/go-colorable) available under [license](https://github.com/mattn/go-colorable/blob/master/LICENSE) 
 * [go-isatty](https://github.com/mattn/go-isatty) available under [license](https://github.com/mattn/go-isatty/blob/master/LICENSE) 
@@ -131,6 +135,7 @@ Proton Mail Bridge includes the following 3rd party software:
 * [golang-asm](https://github.com/twitchyliquid64/golang-asm) available under [license](https://github.com/twitchyliquid64/golang-asm/blob/master/LICENSE) 
 * [codec](https://github.com/ugorji/go/codec) available under [license](https://github.com/ugorji/go/codec/blob/master/LICENSE) 
 * [tagparser](https://github.com/vmihailenco/tagparser/v2) available under [license](https://github.com/vmihailenco/tagparser/v2/blob/master/LICENSE) 
+* [float16](https://github.com/x448/float16) available under [license](https://github.com/x448/float16/blob/master/LICENSE) 
 * [smetrics](https://github.com/xrash/smetrics) available under [license](https://github.com/xrash/smetrics/blob/master/LICENSE) 
 * [go-ordered-json](https://gitlab.com/c0b/go-ordered-json) available under [license](https://gitlab.com/c0b/go-ordered-json/blob/master/LICENSE) 
 * [go.opencensus.io](https://pkg.go.dev/go.opencensus.io?tab=licenses) available under [license](https://pkg.go.dev/go.opencensus.io?tab=licenses) 
@@ -142,9 +147,11 @@ Proton Mail Bridge includes the following 3rd party software:
 * [appengine](https://google.golang.org/appengine) available under [license](https://pkg.go.dev/google.golang.org/appengine?tab=licenses) 
 * [genproto](https://google.golang.org/genproto) available under [license](https://pkg.go.dev/google.golang.org/genproto?tab=licenses) 
 * [yaml](https://gopkg.in/yaml.v3) available under [license](https://github.com/go-yaml/yaml/blob/v3.0.1/LICENSE)  available under [license](https://github.com/go-yaml/yaml/blob/v3.0.1/LICENSE) 
-* [go-autostart](https://github.com/ElectroNafta/go-autostart) available under [license](https://github.com/ElectroNafta/go-autostart/blob/master/LICENSE) 
+* [go-autostart](https://github.com/ProtonMail/go-autostart) available under [license](https://github.com/ProtonMail/go-autostart/blob/master/LICENSE) 
 * [go-message](https://github.com/ProtonMail/go-message) available under [license](https://github.com/ProtonMail/go-message/blob/master/LICENSE) 
 * [go-smtp](https://github.com/ProtonMail/go-smtp) available under [license](https://github.com/ProtonMail/go-smtp/blob/master/LICENSE) 
-* [resty](https://github.com/LBeernaertProton/resty/v2) available under [license](https://github.com/LBeernaertProton/resty/v2/blob/master/LICENSE) 
+* [winhello](https://github.com/ProtonMail/winhello) available under [license](https://github.com/ProtonMail/winhello/blob/master/LICENSE) 
-* [go-keychain](https://github.com/cuthix/go-keychain) available under [license](https://github.com/cuthix/go-keychain/blob/master/LICENSE) 
+* [resty](https://github.com/ProtonMail/resty/v2) available under [license](https://github.com/ProtonMail/resty/v2/blob/master/LICENSE) 
+* [go-keychain](https://github.com/ProtonMail/go-keychain) available under [license](https://github.com/ProtonMail/go-keychain/blob/master/LICENSE) 
+* [go-libfido2](https://github.com/ProtonMail/go-libfido2) available under [license](https://github.com/ProtonMail/go-libfido2/blob/master/LICENSE) 
 <!-- END AUTOGEN -->

Changelog.md

@@ -3,6 +3,61 @@
 Changelog [format](http://keepachangelog.com/en/1.0.0/)
 
 
+## Laviolette Bridge 3.22.0
+
+### Added
+* BRIDGE-358: Hover tooltip for IMAP/SMTP settings clipboard UI actions.
+* BRIDGE-356: Added support for unavailable keychain retries on Linux, such that we don't wipe the vault. Feature flag support before Bridge initialization. 
+* BRIDGE-278: Rollout feature flag support.
+* BRIDGE-151: Additional sentry reporting related to auto-update failures.
+* BRIDGE-361: Debug information on the utilized keychain helper.
+* BRIDGE-396: Observability caching and metrics for vault related issues.
+* BRIDGE-449: Generic IMAP OK heartbeat for long lasting commands.
+
+### Changed
+* BRIDGE-374: Modified MBOX header sanitization logic, it now ensures that RFC822 headers are present before stripping content.
+* BRIDGE-391: Simplified internal label conflict resolver.
+* BRIDGE-409: Increased the import size limit to 55MB.
+* BRIDGE-369: Bumped gopenpgp to v2.9.0. 
+* BRIDGE-455: Bumped Go to 1.24.11.
+* BRIDGE-424: FIDO2 support.
+
+### Fixed
+* BRIDGE-395: Don't store the last utilized keychain as the user preference on Windows & macOS.
+* BRIDGE-387: Use the address gluon ID, instead of the address ID to fetch message counts.
+* BRIDGE-394: Prevent the RFC822 parser from mutating the message literal.
+* BRIDGE-355: Prevent Bridge from crashing when an unknown message charset is detected on Import.
+* BRIDGE-447: Adjusted error message for message import size limitation.
+
+
+## Kanmon Bridge 3.21.2
+
+### Fixed
+* BRIDGE-406: Fixed faulty certificate chain validation logic. Made certificate pin checks exclusive to leaf certificates.
+
+
+## Kanmon Bridge 3.21.1
+
+### Changed
+* BRIDGE-383: Extended internal mailbox conflict resolution logic and minor changes to the mailbox conflict pre-checker. 
+
+
+## Kanmon Bridge 3.21.0
+
+### Added 
+* BRIDGE-379: Mailbox pre-check on Bridge startup & conflict resolver for Bridge internal mailboxes. 
+
+### Changed
+* BRIDGE-376: Explicitly catch Gluon DB mailbox name conflicts and report them to Sentry.
+* BRIDGE-373: Extend user mailbox conflict resolver logging & report sync errors to Sentry.
+* BRIDGE-366: Kill switch support for IMAP IDLE.
+* BRIDGE-363: Observability metric support for IMAP connections.
+
+### Fixed
+* BRIDGE-377: Correct API label field usage on user label conflict resolver - update handler (event loop).
+* BRIDGE-378: Fix incorrect field usage for system mailbox names.
+
+
 ## Jubilee Bridge 3.20.1
 
 ### Fixed

Makefile

@@ -9,10 +9,10 @@ TARGET_OS?=${GOOS}
 ROOT_DIR:=$(realpath .)
 
 ## Build
-.PHONY: build build-gui build-nogui build-launcher versioner hasher
+.PHONY: build build-gui build-nogui build-launcher versioner hasher install-libfido2
 
 # Keep version hardcoded so app build works also without Git repository.
-BRIDGE_APP_VERSION?=3.20.1+git
+BRIDGE_APP_VERSION?=3.22.0+git
 APP_VERSION:=${BRIDGE_APP_VERSION}
 APP_FULL_NAME:=Proton Mail Bridge
 APP_VENDOR:=Proton AG
@@ -32,6 +32,24 @@ BUILD_FLAGS_LAUNCHER:=${BUILD_FLAGS}
 GO_LDFLAGS:=$(addprefix -X github.com/ProtonMail/proton-bridge/v3/internal/constants., Version=${APP_VERSION} Revision=${REVISION} Tag=${TAG} BuildTime=${BUILD_TIME})
 GO_LDFLAGS+=-X "github.com/ProtonMail/proton-bridge/v3/internal/constants.FullAppName=${APP_FULL_NAME}"
 
+## Libfido2 set-up.
+# We use vcpkg for libfido2 on *nix systems.
+VCPKG_ROOT_NIX := $(ROOT_DIR)/extern/vcpkg
+
+ifeq "${TARGET_OS}" "darwin"
+    VCPKG_INSTALLED_ARM := $(VCPKG_ROOT_NIX)/installed/arm64-osx
+    VCPKG_INSTALLED_X64 := $(VCPKG_ROOT_NIX)/installed/x64-osx
+
+	LIBFIDO2_CFLAGS_ARM64 := -I$(VCPKG_INSTALLED_ARM)/include
+	LIBFIDO2_LDFLAGS_ARM64 := -L$(VCPKG_INSTALLED_ARM)/lib -lfido2 -lcbor -lssl -lcrypto
+
+	LIBFIDO2_CFLAGS_X64 := -I$(VCPKG_INSTALLED_X64)/include
+	LIBFIDO2_LDFLAGS_X64 := -L$(VCPKG_INSTALLED_X64)/lib -lfido2 -lcbor -lssl -lcrypto
+endif
+ifeq "${TARGET_OS}" "linux"
+    LIBFIDO2_LDFLAGS := -lfido2 -lcbor -lssl -lcrypto
+endif
+
 ifneq "${DSN_SENTRY}" ""
 	GO_LDFLAGS+=-X github.com/ProtonMail/proton-bridge/v3/internal/constants.DSNSentry=${DSN_SENTRY}
 endif
@@ -95,8 +113,14 @@ go-build=go build $(1) -o $(2) $(3)
 go-build-finalize=${go-build}
 ifeq "${GOOS}-$(shell uname -m)" "darwin-arm64"
 	go-build-finalize= \
-		MACOSX_DEPLOYMENT_TARGET=${MACOS_MIN_VERSION_ARM64} CGO_ENABLED=1 CGO_CFLAGS="-mmacosx-version-min=${MACOS_MIN_VERSION_ARM64}" GOARCH=arm64 $(call go-build,$(1),$(2)_arm,$(3)) && \
+		MACOSX_DEPLOYMENT_TARGET=${MACOS_MIN_VERSION_ARM64} CGO_ENABLED=1 \
-		MACOSX_DEPLOYMENT_TARGET=${MACOS_MIN_VERSION_AMD64} CGO_ENABLED=1 CGO_CFLAGS="-mmacosx-version-min=${MACOS_MIN_VERSION_AMD64}" GOARCH=amd64 $(call go-build,$(1),$(2)_amd,$(3)) && \
+    	CGO_CFLAGS="-mmacosx-version-min=${MACOS_MIN_VERSION_ARM64} ${LIBFIDO2_CFLAGS_ARM64}" \
+    	CGO_LDFLAGS="${LIBFIDO2_LDFLAGS_ARM64}" \
+		GOARCH=arm64 $(call go-build,$(1),$(2)_arm,$(3)) && \
+		MACOSX_DEPLOYMENT_TARGET=${MACOS_MIN_VERSION_AMD64} CGO_ENABLED=1 \
+		CGO_CFLAGS="-mmacosx-version-min=${MACOS_MIN_VERSION_AMD64} ${LIBFIDO2_CFLAGS_X64}" \
+		CGO_LDFLAGS="${LIBFIDO2_LDFLAGS_X64}" \
+		GOARCH=amd64 $(call go-build,$(1),$(2)_amd,$(3)) && \
 		lipo -create -output $(2) $(2)_arm $(2)_amd && rm -f $(2)_arm $(2)_amd
 endif
 
@@ -107,6 +131,14 @@ ifeq "${GOOS}" "windows"
 		$(if $(4), && rm -f ${4},)
 endif
 
+ifneq "${GOOS}" "darwin"
+ifneq "${GOOS}" "windows"
+	go-build-finalize= \
+		CGO_LDFLAGS="${LIBFIDO2_LDFLAGS}" \
+		$(call go-build,$(1),$(2),$(3))
+endif
+endif
+
 ${EXE_NAME}: gofiles  ${RESOURCE_FILE}
 	$(call go-build-finalize,${BUILD_FLAGS},"${LAUNCHER_EXE}","./cmd/${TARGET_CMD}/","${ROOT_DIR}/cmd/${TARGET_CMD}/${RESOURCE_FILE}")
 	mv ${LAUNCHER_EXE} ${BRIDGE_EXE}
@@ -137,7 +169,7 @@ ${DEPLOY_DIR}/linux: ${EXE_TARGET} build-launcher
 	cp -pf ./dist/${EXE_NAME}.desktop ${DEPLOY_DIR}/linux/
 	mv ${LAUNCHER_EXE} ${DEPLOY_DIR}/linux/
 
-${DEPLOY_DIR}/darwin: ${EXE_TARGET} build-launcher
+${DEPLOY_DIR}/darwin: install-libfido2 ${EXE_TARGET} build-launcher
 	mv ${EXE_GUI_TARGET} ${EXE_TARGET_DARWIN}
 	mv ${EXE_TARGET} ${DARWINAPP_CONTENTS}/MacOS/${BRIDGE_EXE_NAME}
 	perl -i -pe"s/>${BRIDGE_GUI_EXE_NAME}/>${LAUNCHER_EXE}/g" ${DARWINAPP_CONTENTS}/Info.plist
@@ -411,6 +443,10 @@ clean-vcpkg:
 	rm -rf ./.git/submodule/vcpkg
 	rm -rf ./extern/vcpkg
 	git checkout -- extern/vcpkg
+	git submodule deinit -f ./extern/vcpkg-windows
+	rm -rf ./.git/submodule/vcpkg-windows
+	rm -rf ./extern/vcpkg-windows
+	git checkout -- extern/vcpkg-windows
 
 clean: clean-vendor clean-gui clean-vcpkg
 	rm -rf vendor-cache
@@ -423,6 +459,15 @@ clean: clean-vendor clean-gui clean-vcpkg
 	rm -f ${LAUNCHER_EXE} ${BRIDGE_EXE} ${BRIDGE_EXE_NAME}
 
 
+install-libfido2:
+ifeq "${TARGET_OS}" "darwin"
+	git submodule update --init --recursive ${VCPKG_ROOT_NIX} || \
+		{ echo "Failed to init vcpkg submodule"; exit 1; }
+	${VCPKG_ROOT_NIX}/bootstrap-vcpkg.sh -disableMetrics
+	cd extern/vcpkg && ./vcpkg install libfido2:arm64-osx libfido2:x64-osx
+endif
+
+
 .PHONY: generate
 generate:
 	go generate ./...

README.md

@@ -1,5 +1,5 @@
 # Proton Mail Bridge
-Copyright (c) 2025 Proton AG
+Copyright (c) 2026 Proton AG
 
 This repository holds the Proton Mail Bridge application.
 For a detailed build information see [BUILDS](./BUILDS.md).

ci/build.yml

@@ -1,5 +1,4 @@
 ---
-
 .script-build:
   stage: build
   needs: ["lint"]
@@ -22,6 +21,7 @@
       - bridge_*.tgz
       - vault-editor
       - bridge-rollout
+
 build-linux:
   extends:
     - .script-build
@@ -33,6 +33,7 @@ build-linux-qa:
     - .rules-branch-manual-MR-and-devel-always
   variables:
     BUILD_TAGS: "build_qa"
+    VCPKG_MAX_CONCURRENCY: 1
 
 build-darwin:
   extends:

ci/env.yml

@@ -1,6 +1,4 @@
-
 ---
-
 .env-windows:
   extends:
     - .image-windows-virt-build
@@ -15,10 +13,10 @@
     BRIDGE_SYNC_FORCE_MINIMUM_SPEC: 1
     VCPKG_DEFAULT_BINARY_CACHE: ${CI_PROJECT_DIR}/.cache
   cache:
-    key: windows-vcpkg-go-0
+    key: windows-vcpkg-go-1
     paths:
       - .cache
-    when: 'always'
+    when: "always"
 
 .env-darwin:
   extends:
@@ -36,7 +34,7 @@
     key: darwin-go-and-vcpkg
     paths:
       - .cache
-    when: 'always'
+    when: "always"
 
 .env-linux-build:
   extends:
@@ -47,7 +45,7 @@
     key: linux-vcpkg
     paths:
       - .cache
-    when: 'always'
+    when: "always"
   before_script:
     - export BRIDGE_SYNC_FORCE_MINIMUM_SPEC=1
     - !reference [.before-script-git-config, before_script]
@@ -56,4 +54,3 @@
     - export GOPATH="$CI_PROJECT_DIR/.cache"
   tags:
     - shared-large
-

ci/setup.yml

@@ -1,7 +1,5 @@
 ---
-
 include:
-  - project: 'go/bridge-internal'
+  - project: "go/bridge-internal"
-    ref: 'master'
+    ref: "master"
-    file: 'ci/runners-setup.yml'
+    file: "ci/runners-setup.yml"
-

ci/test.yml

@@ -1,6 +1,4 @@
-
 ---
-
 lint:
   stage: test
   extends:
@@ -33,8 +31,6 @@ lint-bug-report-preview:
     paths:
       - coverage/**
 
-
-
 test-linux:
   extends:
     - .image-linux-test
@@ -93,7 +89,6 @@ test-integration-race:
     paths:
       - integration-race-job.log
 
-
 test-integration-nightly:
   extends:
     - test-integration
@@ -131,12 +126,43 @@ test-coverage:
     paths:
       - coverage*
       - coverage/**
-    when: 'always'
+    when: "always"
     reports:
       coverage_report:
         coverage_format: cobertura
         path: coverage.xml
 
+test-e2e-ui:
+  stage: test
+  extends:
+    - .rules-branch-manual-scheduled-and-test-branch-always
+  tags:
+    - inbox-hyperv-windows-v1
+  image: windows-2022-inbox-gui-1.0.0
+  variables:
+    REQUIRES_GRAPHICAL_CONSOLE: true
+  before_script:
+    - echo "Downloading dotnet dependencies"
+    - cd ./tests/e2e/ui_tests/windows_os/
+    - dotnet restore ./ProtonMailBridge.UI.Tests.csproj
+    - dotnet list package
+  script:
+    - |
+      pwsh "$Env:CI_PROJECT_DIR/tests/e2e/ui_tests/windows_os/InstallerScripts/Get-BridgeInstaller.ps1"
+    - |
+      $Env:no_grpc_proxy="127.0.0.1"
+      $no_grpc_proxy="127.0.0.1"
+      dotnet test ./ProtonMailBridge.UI.Tests.csproj -- NUnit.Where="cat != TemporarilyExcluded"
+  after_script:
+    - |
+      cp "C:\Users\gitlab-runner\AppData\Roaming\protonmail\bridge-v3\logs\*" "$Env:CI_PROJECT_DIR\tests\e2e\ui_tests\windows_os\Results\artifacts\Logs\"
+    - |
+      pwsh "$Env:CI_PROJECT_DIR\tests\e2e\ui_tests\windows_os\InstallerScripts\Remove-Bridge.ps1"
+  artifacts:
+    paths:
+      - tests/e2e/ui_tests/windows_os/Results/artifacts/*
+    when: always
+
 go-vuln-check:
   extends:
     - .image-linux-test
@@ -150,4 +176,3 @@ go-vuln-check:
     when: always
     paths:
       - vulns*
-

cmd/Desktop-Bridge/main.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

cmd/Desktop-Bridge/main_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

cmd/launcher/main.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -31,6 +31,7 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/crash"
 	"github.com/ProtonMail/proton-bridge/v3/internal/locations"
 	"github.com/ProtonMail/proton-bridge/v3/internal/logging"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/sentry"
 	"github.com/ProtonMail/proton-bridge/v3/internal/updater"
 	"github.com/ProtonMail/proton-bridge/v3/internal/useragent"
@@ -164,7 +165,7 @@ func main() { //nolint:funlen
 
 	// On windows, if you use Run(), a terminal stays open; we don't want that.
 	if //goland:noinspection GoBoolExpressions
-	runtime.GOOS == "windows" {
+	runtime.GOOS == platform.WINDOWS {
 		err = cmd.Start()
 	} else {
 		err = cmd.Run()

cmd/launcher/main_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

go.mod

@@ -1,16 +1,16 @@
 module github.com/ProtonMail/proton-bridge/v3
 
-go 1.24
+go 1.24.4
 
-toolchain go1.24.2
+toolchain go1.24.11
 
 require (
 	github.com/0xAX/notificator v0.0.0-20220220101646-ee9b8921e557
 	github.com/Masterminds/semver/v3 v3.2.0
-	github.com/ProtonMail/gluon v0.17.1-0.20250604083016-c6e17f8461b1
+	github.com/ProtonMail/gluon v0.17.1-0.20260112123503-2046c95ca745
 	github.com/ProtonMail/go-autostart v0.0.0-20210130080809-00ed301c8e9a
-	github.com/ProtonMail/go-proton-api v0.4.1-0.20250417134000-e624a080f7ba
+	github.com/ProtonMail/go-proton-api v0.4.1-0.20260109112619-daf7af47921d
-	github.com/ProtonMail/gopenpgp/v2 v2.8.2-proton
+	github.com/ProtonMail/gopenpgp/v2 v2.9.0-proton
 	github.com/PuerkitoBio/goquery v1.8.1
 	github.com/abiosoft/ishell v2.0.0+incompatible
 	github.com/allan-simon/go-singleinstance v0.0.0-20210120080615-d0997106ab37
@@ -26,41 +26,44 @@ require (
 	github.com/emersion/go-smtp v0.15.1-0.20221021114529-49b17434419d
 	github.com/emersion/go-vcard v0.0.0-20230331202150-f3d26859ccd3
 	github.com/fatih/color v1.13.0
+	github.com/fxamacker/cbor/v2 v2.9.0
 	github.com/getsentry/sentry-go v0.15.0
+	github.com/go-ctap/ctaphid v0.8.1
+	github.com/go-ctap/winhello v0.1.0
 	github.com/go-resty/resty/v2 v2.7.0
 	github.com/godbus/dbus v4.1.0+incompatible
 	github.com/golang/mock v1.6.0
-	github.com/google/go-cmp v0.6.0
+	github.com/google/go-cmp v0.7.0
-	github.com/google/uuid v1.3.0
+	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-multierror v1.1.1
 	github.com/jaytaylor/html2text v0.0.0-20211105163654-bc68cce691ba
 	github.com/jeandeaual/go-locale v0.0.0-20220711133428-7de61946b173
 	github.com/keybase/go-keychain v0.0.0
+	github.com/keys-pub/go-libfido2 v1.5.4-0.20250104233141-2534349bd685
 	github.com/miekg/dns v1.1.50
 	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58
 	github.com/pkg/errors v0.9.1
 	github.com/pkg/profile v1.7.0
-	github.com/sirupsen/logrus v1.9.2
+	github.com/sirupsen/logrus v1.9.3
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.11.1
 	github.com/urfave/cli/v2 v2.24.4
 	github.com/vmihailenco/msgpack/v5 v5.3.5
 	go.uber.org/goleak v1.2.1
 	golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1
-	golang.org/x/net v0.38.0
+	golang.org/x/net v0.42.0
-	golang.org/x/oauth2 v0.7.0
+	golang.org/x/oauth2 v0.30.0
-	golang.org/x/sys v0.31.0
+	golang.org/x/sys v0.35.0
-	golang.org/x/text v0.23.0
+	golang.org/x/text v0.28.0
 	google.golang.org/api v0.114.0
-	google.golang.org/grpc v1.56.3
+	google.golang.org/grpc v1.75.1
-	google.golang.org/protobuf v1.33.0
+	google.golang.org/protobuf v1.36.6
 	howett.net/plist v1.0.0
 )
 
 require (
-	cloud.google.com/go/compute v1.19.1 // indirect
+	cloud.google.com/go/compute/metadata v0.7.0 // indirect
-	cloud.google.com/go/compute/metadata v0.2.3 // indirect
 	github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf // indirect
-	github.com/ProtonMail/go-crypto v1.1.4-proton // indirect
+	github.com/ProtonMail/go-crypto v1.3.0-proton // indirect
 	github.com/ProtonMail/go-mime v0.0.0-20230322103455-7d82a3887f2f // indirect
 	github.com/ProtonMail/go-srp v0.0.7 // indirect
 	github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db // indirect
@@ -68,7 +71,7 @@ require (
 	github.com/bytedance/sonic v1.9.1 // indirect
 	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
 	github.com/chzyer/test v1.0.0 // indirect
-	github.com/cloudflare/circl v1.5.0 // indirect
+	github.com/cloudflare/circl v1.6.1 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
 	github.com/cronokirby/saferith v0.33.0 // indirect
 	github.com/cucumber/gherkin-go/v19 v19.0.3 // indirect
@@ -87,7 +90,7 @@ require (
 	github.com/goccy/go-json v0.10.2 // indirect
 	github.com/gofrs/uuid v4.3.0+incompatible // indirect
 	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
-	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/google/pprof v0.0.0-20211214055906-6f57359322fd // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
 	github.com/googleapis/gax-go/v2 v2.7.1 // indirect
@@ -98,6 +101,7 @@ require (
 	github.com/joeshaw/multierror v0.0.0-20140124173710-69b34d4ec901 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/ldclabs/cose v1.3.2 // indirect
 	github.com/leodido/go-urn v1.2.4 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.19 // indirect
@@ -114,27 +118,30 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
-	github.com/stretchr/objx v0.5.0 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	gitlab.com/c0b/go-ordered-json v0.0.0-20201030195603-febf46534d5a // indirect
 	go.opencensus.io v0.24.0 // indirect
 	golang.org/x/arch v0.3.0 // indirect
-	golang.org/x/crypto v0.36.0 // indirect
+	golang.org/x/crypto v0.41.0 // indirect
-	golang.org/x/mod v0.17.0 // indirect
+	golang.org/x/mod v0.26.0 // indirect
-	golang.org/x/sync v0.12.0 // indirect
+	golang.org/x/sync v0.16.0 // indirect
-	golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d // indirect
+	golang.org/x/tools v0.35.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 
 replace (
-	github.com/ProtonMail/go-autostart => github.com/ElectroNafta/go-autostart v0.0.0-20250402094843-326608c16033
+	github.com/ProtonMail/go-autostart => github.com/ProtonMail/go-autostart v0.0.0-20250402094843-326608c16033
 	github.com/emersion/go-message => github.com/ProtonMail/go-message v0.13.1-0.20240919135104-3bc88e6a9423
 	github.com/emersion/go-smtp => github.com/ProtonMail/go-smtp v0.0.0-20231109081432-2b3d50599865
-	github.com/go-resty/resty/v2 => github.com/LBeernaertProton/resty/v2 v2.0.0-20231129100320-dddf8030d93a
+	github.com/go-ctap/winhello => github.com/ProtonMail/winhello v0.0.0-20250918145518-a739b7dc2e56
-	github.com/keybase/go-keychain => github.com/cuthix/go-keychain v0.0.0-20240103134243-0b6a41580b77
+	github.com/go-resty/resty/v2 => github.com/ProtonMail/resty/v2 v2.0.0-20250929142426-e3dc6308c80b
+	github.com/keybase/go-keychain => github.com/ProtonMail/go-keychain v0.0.0-20250929142014-ea8548dff768
+	github.com/keys-pub/go-libfido2 => github.com/ProtonMail/go-libfido2 v0.0.0-20250916110427-df894d6d07a1
 )

go.sum

@@ -7,10 +7,8 @@ cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTj
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
 cloud.google.com/go v0.110.0 h1:Zc8gqp3+a9/Eyph2KDmcGaPtbKRIoqq4YTlL4NMD0Ys=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/compute v1.19.1 h1:am86mquDUgjGNWxiGn+5PGLbmgiWXlE/yNWpIpNvuXY=
+cloud.google.com/go/compute/metadata v0.7.0 h1:PBWF+iiAerVNe8UCHxdOt6eHLVc3ydFeOCw78U8ytSU=
-cloud.google.com/go/compute v1.19.1/go.mod h1:6ylj3a05WF8leseCdIf77NK0g1ey+nj5IKd5/kvShxE=
+cloud.google.com/go/compute/metadata v0.7.0/go.mod h1:j5MvL9PprKL39t166CoB1uVHfQMs4tFQZZcKwksXUjo=
-cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
-cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
 cloud.google.com/go/longrunning v0.4.1 h1:v+yFJOfKC3yZdY6ZUI933pIYdhyhV8S3NpWrXWmg7jM=
@@ -23,36 +21,50 @@ github.com/0xAX/notificator v0.0.0-20220220101646-ee9b8921e557 h1:l6surSnJ3RP4qA
 github.com/0xAX/notificator v0.0.0-20220220101646-ee9b8921e557/go.mod h1:sTrmvD/TxuypdOERsDOS7SndZg0rzzcCi1b6wQMXUYM=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/ElectroNafta/go-autostart v0.0.0-20250402094843-326608c16033 h1:d2RB9rQmSusb0K+qSgB+DAY+8i+AXZ/o+oDHj2vAUaA=
-github.com/ElectroNafta/go-autostart v0.0.0-20250402094843-326608c16033/go.mod h1:o0nKiWcK0e2G/90uL6akWRkzOV4mFcZmvpBPpigJvdw=
 github.com/Kodeworks/golang-image-ico v0.0.0-20141118225523-73f0f4cfade9/go.mod h1:7uhhqiBaR4CpN0k9rMjOtjpcfGd6DG2m04zQxKnWQ0I=
-github.com/LBeernaertProton/resty/v2 v2.0.0-20231129100320-dddf8030d93a h1:eQO/GF/+H8/9udc9QAgieFr+jr1tjXlJo35RAhsUbWY=
-github.com/LBeernaertProton/resty/v2 v2.0.0-20231129100320-dddf8030d93a/go.mod h1:iiP/OpA0CkcL3IGt1O0+/SIItFUbkkyw5BGXiVdTu+A=
 github.com/Masterminds/semver/v3 v3.2.0 h1:3MEsd0SM6jqZojhjLWWeBY+Kcjy9i6MQAeY7YgDP83g=
 github.com/Masterminds/semver/v3 v3.2.0/go.mod h1:qvl/7zhW3nngYb5+80sSMF+FG2BjYrf8m9wsX0PNOMQ=
-github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2yDvg=
+github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
-github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
+github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/ProtonMail/bcrypt v0.0.0-20210511135022-227b4adcab57/go.mod h1:HecWFHognK8GfRDGnFQbW/LiV7A3MX3gZVs45vk5h8I=
 github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf h1:yc9daCCYUefEs69zUkSzubzjBbL+cmOXgnmt9Fyd9ug=
 github.com/ProtonMail/bcrypt v0.0.0-20211005172633-e235017c1baf/go.mod h1:o0ESU9p83twszAU8LBeJKFAAMX14tISa0yk4Oo5TOqo=
-github.com/ProtonMail/gluon v0.17.1-0.20250604083016-c6e17f8461b1 h1:FvkPBZF/M5GpZTy+hzhaheyi+Z5XWeZOL5GKVKqj85Y=
+github.com/ProtonMail/gluon v0.17.1-0.20251127091939-17b9426ae8f7 h1:PaqJBeXv30G45LFglNMUxChxzGPg+V870BplSGrt0RM=
-github.com/ProtonMail/gluon v0.17.1-0.20250604083016-c6e17f8461b1/go.mod h1:0/c03TzZPNiSgY5UDJK1iRDkjlDPwWugxTT6et2qDu8=
+github.com/ProtonMail/gluon v0.17.1-0.20251127091939-17b9426ae8f7/go.mod h1:OMwmLjgk6yJHX/P5KPck9WOcBVWIJLvuGZjj/8Ts/cw=
+github.com/ProtonMail/gluon v0.17.1-0.20260108112233-b3e52866fa57 h1:aH0EeiBq/5c1rNI/1xzAmJWKgf+nFcqrKCUTUUV4/Sc=
+github.com/ProtonMail/gluon v0.17.1-0.20260108112233-b3e52866fa57/go.mod h1:YbW3CyxVxdbXiEGBwOxTW9nczPa8tA58HMkxosSf8bw=
+github.com/ProtonMail/gluon v0.17.1-0.20260112123503-2046c95ca745 h1:SHUpYnPoW78xQYAZCCcONiFMJDopk1a7vn7P42kYKMM=
+github.com/ProtonMail/gluon v0.17.1-0.20260112123503-2046c95ca745/go.mod h1:YbW3CyxVxdbXiEGBwOxTW9nczPa8tA58HMkxosSf8bw=
+github.com/ProtonMail/go-autostart v0.0.0-20250402094843-326608c16033 h1:4r/ALoiixOOyjc1WhpwlkrcSFtRnc1GHWhk7ERELwbs=
+github.com/ProtonMail/go-autostart v0.0.0-20250402094843-326608c16033/go.mod h1:oTGdE7/DlWIr23G0IKW3OXK9wZ5Hw1GGiaJFccTvZi4=
 github.com/ProtonMail/go-crypto v0.0.0-20230321155629-9a39f2531310/go.mod h1:8TI4H3IbrackdNgv+92dI+rhpCaLqM0IfpgCgenFvRE=
-github.com/ProtonMail/go-crypto v1.1.4-proton h1:KIo9uNlk3vzlwI7o5VjhiEjI4Ld1TDixOMnoNZyfpFE=
+github.com/ProtonMail/go-crypto v1.3.0-proton h1:tAQKQRZX/73VmzK6yHSCaRUOvS/3OYSQzhXQsrR7yUM=
-github.com/ProtonMail/go-crypto v1.1.4-proton/go.mod h1:zNoyBJW3p/yVWiHNZgfTF9VsjwqYof5YY0M9kt2QaX0=
+github.com/ProtonMail/go-crypto v1.3.0-proton/go.mod h1:9whxjD8Rbs29b4XWbB8irEcE8KHMqaR2e7GWU1R+/PE=
+github.com/ProtonMail/go-keychain v0.0.0-20250929142014-ea8548dff768 h1:fTHlbASGfwJ4x4EeQ/JX7CX0YBfbFEcYm2nA6puPaWs=
+github.com/ProtonMail/go-keychain v0.0.0-20250929142014-ea8548dff768/go.mod h1:ZoZU1fnBy3mOLWr3Pg+Y2+nTKtu6ypDte2kZg9HvSwY=
+github.com/ProtonMail/go-libfido2 v0.0.0-20250916110427-df894d6d07a1 h1:MpPKmpti7MswJG5il3A+P24+iGxMj8V7/3JSMSRM1+c=
+github.com/ProtonMail/go-libfido2 v0.0.0-20250916110427-df894d6d07a1/go.mod h1:92J9LtSBl0UyUWljElJpTbMMNhC6VeY8dshsu40qjjo=
 github.com/ProtonMail/go-message v0.13.1-0.20240919135104-3bc88e6a9423 h1:p8nBDxvRnvDOyrcePKkPpErWGhDoTqpX8a1c54CcSu0=
 github.com/ProtonMail/go-message v0.13.1-0.20240919135104-3bc88e6a9423/go.mod h1:NBAn21zgCJ/52WLDyed18YvYFm5tEoeDauubFqLokM4=
 github.com/ProtonMail/go-mime v0.0.0-20230322103455-7d82a3887f2f h1:tCbYj7/299ekTTXpdwKYF8eBlsYsDVoggDAuAjoK66k=
 github.com/ProtonMail/go-mime v0.0.0-20230322103455-7d82a3887f2f/go.mod h1:gcr0kNtGBqin9zDW9GOHcVntrwnjrK+qdJ06mWYBybw=
-github.com/ProtonMail/go-proton-api v0.4.1-0.20250417134000-e624a080f7ba h1:DFBngZ7u/f69flRFzPp6Ipo6PKEyflJlA5OCh52yDB4=
+github.com/ProtonMail/go-proton-api v0.4.1-0.20251127095056-9039cd6bf32a h1:g5A/1Jg7JR8MXucKDUJv48LnXq1mOSlI2yXo6/X4R/s=
-github.com/ProtonMail/go-proton-api v0.4.1-0.20250417134000-e624a080f7ba/go.mod h1:eXIoLyIHxvPo8Kd9e1ygYIrAwbeWJhLi3vgSz2crlK4=
+github.com/ProtonMail/go-proton-api v0.4.1-0.20251127095056-9039cd6bf32a/go.mod h1:Xv7eeoGjaOLMZcjJj++yWNV99q5enByr0WcuF/ltTRA=
+github.com/ProtonMail/go-proton-api v0.4.1-0.20260108112223-c9e6b92ad1fc h1:azlBBcGC5Y6FuEFRCY16pXh8vy268C9JBS6oU/AA33k=
+github.com/ProtonMail/go-proton-api v0.4.1-0.20260108112223-c9e6b92ad1fc/go.mod h1:aVHyE5kG38rm99RQYuP3wWn8QuJpM5Me6KHaIDD92Qs=
+github.com/ProtonMail/go-proton-api v0.4.1-0.20260109112619-daf7af47921d h1:q8y/G0qLRTxZr1xXk/kKFd2xwiyq44Yn2vI0xJJ6bhA=
+github.com/ProtonMail/go-proton-api v0.4.1-0.20260109112619-daf7af47921d/go.mod h1:aVHyE5kG38rm99RQYuP3wWn8QuJpM5Me6KHaIDD92Qs=
 github.com/ProtonMail/go-smtp v0.0.0-20231109081432-2b3d50599865 h1:EP1gnxLL5Z7xBSymE9nSTM27nRYINuvssAtDmG0suD8=
 github.com/ProtonMail/go-smtp v0.0.0-20231109081432-2b3d50599865/go.mod h1:qm27SGYgoIPRot6ubfQ/GpiPy/g3PaZAVRxiO/sDUgQ=
 github.com/ProtonMail/go-srp v0.0.7 h1:Sos3Qk+th4tQR64vsxGIxYpN3rdnG9Wf9K4ZloC1JrI=
 github.com/ProtonMail/go-srp v0.0.7/go.mod h1:giCp+7qRnMIcCvI6V6U3S1lDDXDQYx2ewJ6F/9wdlJk=
-github.com/ProtonMail/gopenpgp/v2 v2.8.2-proton h1:MMVgE6nk5Ulh9Ud5L1Xc5iaPKE85FbfKQV17ZMucrR0=
+github.com/ProtonMail/gopenpgp/v2 v2.9.0-proton h1:K3YRIBJo3YVObikaV9y1KWYGxFWRML+pFaiyh8ON2xA=
-github.com/ProtonMail/gopenpgp/v2 v2.8.2-proton/go.mod h1:+PjybET6fgcLzldFy1hpy7s8VibZ0T1hLFbxnnMk0lo=
+github.com/ProtonMail/gopenpgp/v2 v2.9.0-proton/go.mod h1:NJ4RywdeD2sXCJyRRwb0ZYCx+QwGi14HUmlyNPegiwI=
+github.com/ProtonMail/resty/v2 v2.0.0-20250929142426-e3dc6308c80b h1:0GYNP0odNPJFn1fbfwthcYPd3it0AVntvSaCjh2nlaE=
+github.com/ProtonMail/resty/v2 v2.0.0-20250929142426-e3dc6308c80b/go.mod h1:iiP/OpA0CkcL3IGt1O0+/SIItFUbkkyw5BGXiVdTu+A=
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@@ -94,8 +106,8 @@ github.com/chzyer/test v1.0.0 h1:p3BQDXSxOhOG0P9z6/hGnII4LGiEPOYBhs8asl/fC04=
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@@ -114,8 +126,6 @@ github.com/cucumber/godog v0.12.5/go.mod h1:u6SD7IXC49dLpPN35kal0oYEjsXZWee4pW6T
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@@ -161,6 +171,8 @@ github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BMXYYRWT
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@@ -172,6 +184,8 @@ github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE
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@@ -180,6 +194,10 @@ github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200625191551-73d3c3675aa3/go.mod h1:tQ2
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@@ -194,6 +212,8 @@ github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MG
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@@ -221,9 +241,8 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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@@ -232,9 +251,8 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -243,8 +261,8 @@ github.com/google/pprof v0.0.0-20211214055906-6f57359322fd h1:1FjCyPC+syAzJ5/2S8
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@@ -325,6 +343,8 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
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@@ -418,8 +438,8 @@ github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb
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@@ -441,8 +461,9 @@ github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf/go.mod h1:RJID2RhlZKId02n
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@@ -453,8 +474,8 @@ github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO
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-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/subosito/gotenv v1.2.0/go.mod h1:N0PQaV/YGNqwC0u51sEeR/aUtSLEXKX9iv69rRypqCw=
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/twitchyliquid64/golang-asm v0.15.1 h1:SU5vSMR7hnwNxj24w34ZyCi/FmDZTkS4MhqMhdFk5YI=
@@ -467,6 +488,8 @@ github.com/vmihailenco/msgpack/v5 v5.3.5 h1:5gO0H1iULLWGhs2H5tbAHIZTV8/cYafcFOr9
 github.com/vmihailenco/msgpack/v5 v5.3.5/go.mod h1:7xyJ9e+0+9SaZT0Wt1RGleJXzli6Q/V5KbhBonMG9jc=
 github.com/vmihailenco/tagparser/v2 v2.0.0 h1:y09buUbR+b5aycVFQs/g70pqKVZNBmxwAhO7/IwNM9g=
 github.com/vmihailenco/tagparser/v2 v2.0.0/go.mod h1:Wri+At7QHww0WTrCBeu4J6bNtoV6mEfg5OIWRZA9qds=
+github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
+github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU=
 github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8=
@@ -480,6 +503,18 @@ go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.24.0 h1:y73uSU6J157QMP2kn2r30vwW1A2W2WFwSCGnAVxeaD0=
 go.opencensus.io v0.24.0/go.mod h1:vNK8G9p7aAivkbmorf4v+7Hgx+Zs0yY+0fOtgBfjQKo=
+go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
+go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
+go.opentelemetry.io/otel v1.37.0 h1:9zhNfelUvx0KBfu/gb+ZgeAfAgtWrfHJZcAqFC228wQ=
+go.opentelemetry.io/otel v1.37.0/go.mod h1:ehE/umFRLnuLa/vSccNq9oS1ErUlkkK71gMcN34UG8I=
+go.opentelemetry.io/otel/metric v1.37.0 h1:mvwbQS5m0tbmqML4NqK+e3aDiO02vsf/WgbsdpcPoZE=
+go.opentelemetry.io/otel/metric v1.37.0/go.mod h1:04wGrZurHYKOc+RKeye86GwKiTb9FKm1WHtO+4EVr2E=
+go.opentelemetry.io/otel/sdk v1.37.0 h1:ItB0QUqnjesGRvNcmAcU0LyvkVyGJ2xftD29bWdDvKI=
+go.opentelemetry.io/otel/sdk v1.37.0/go.mod h1:VredYzxUvuo2q3WRcDnKDjbdvmO0sCzOvVAiY+yUkAg=
+go.opentelemetry.io/otel/sdk/metric v1.37.0 h1:90lI228XrB9jCMuSdA0673aubgRobVZFhbjxHHspCPc=
+go.opentelemetry.io/otel/sdk/metric v1.37.0/go.mod h1:cNen4ZWfiD37l5NhS+Keb5RXVWZWpRE+9WyVCpbo5ps=
+go.opentelemetry.io/otel/trace v1.37.0 h1:HLdcFNbRQBE2imdSEgm/kwqmQj1Or1l/7bW6mxVK7z4=
+go.opentelemetry.io/otel/trace v1.37.0/go.mod h1:TlgrlQ+PtQO5XFerSPUYG0JSgGyryXewPGyayAWSBS0=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
 go.uber.org/goleak v1.2.1/go.mod h1:qlT2yGI9QafXHhZZLxlSuNsMw3FFLxBr+tBRlmO1xH4=
@@ -498,8 +533,8 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.7.0/go.mod h1:pYwdfH91IfpZVANVyUOhSIPZaFoJGxTFbZhFTx+dXZU=
 golang.org/x/crypto v0.14.0/go.mod h1:MVFd36DqK4CsrnJYDkBA3VC4m2GkXAM0PvzMCn4JQf4=
-golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34=
+golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
-golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc=
+golang.org/x/crypto v0.41.0/go.mod h1:pO5AFd7FA68rFak7rOAGVuygIISepHftHnr8dr6+sUc=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -525,8 +560,8 @@ golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.17.0 h1:zY54UmvipHiNd+pm+m0x9KhZ9hl1/7QNMyxXbc6ICqA=
+golang.org/x/mod v0.26.0 h1:EGMPT//Ezu+ylkCijjPc+f4Aih7sZvaAr+O3EHBxvZg=
-golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.26.0/go.mod h1:/j6NAhSk8iQ723BGAUyoAcn7SlD7s15Dp9Nd/SfeaFQ=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -555,13 +590,13 @@ golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
 golang.org/x/net v0.9.0/go.mod h1:d48xBJpPfHeWQsugry2m+kC02ZBRGRgulfHnEXEuWns=
 golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
-golang.org/x/net v0.38.0 h1:vRMAPTMaeGqVhG5QyLJHqNDwecKTomGeqbnfZyKlBI8=
+golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
-golang.org/x/net v0.38.0/go.mod h1:ivrbrMbzFq5J41QOQh0siUuly180yBYtLp+CKbEaFx8=
+golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.7.0 h1:qe6s0zUXlPX80/dITx3440hWZ7GwMwgDDyrSGTPJG/g=
+golang.org/x/oauth2 v0.30.0 h1:dnDm7JmhM45NNpd8FDDeLhK6FwqbOf4MLCM9zb1BOHI=
-golang.org/x/oauth2 v0.7.0/go.mod h1:hPLQkd9LyjfXTiRohC/41GhcFqxisoUQ99sCUOHO9x4=
+golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -571,8 +606,8 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.12.0 h1:MHc5BpPuC30uJk597Ri8TV3CNZcTLu6B6z4lJy+g6Jw=
+golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
-golang.org/x/sync v0.12.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -611,8 +646,8 @@ golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
+golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
-golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -632,8 +667,8 @@ golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.8.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
-golang.org/x/text v0.23.0 h1:D71I7dUrlY+VX0gQShAThNGHFxZ13dGLBHQLVl1mJlY=
+golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
-golang.org/x/text v0.23.0/go.mod h1:/BLNzu4aZCJ1+kcD0DNRotWKage4q2rGVAg4o22unh4=
+golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
@@ -663,12 +698,14 @@ golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d h1:vU5i/LfpvrRCpgM/VPfJLg5KjxD3E+hfT1SH+d9zLwg=
+golang.org/x/tools v0.35.0 h1:mBffYraMEf7aa0sB+NuKnuCy8qI/9Bughn8dC2Gu5r0=
-golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
+golang.org/x/tools v0.35.0/go.mod h1:NKdj5HkL/73byiZSJjqJgKn3ep7KjFkBOkR/Hps3VPw=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
+gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
 google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
@@ -701,8 +738,8 @@ google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyac
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
-google.golang.org/grpc v1.56.3 h1:8I4C0Yq1EjstUzUJzpcRVbuYA2mODtEmpWiQoN/b2nc=
+google.golang.org/grpc v1.75.1 h1:/ODCNEuf9VghjgO3rqLcfg8fiOP0nSluljWFlDxELLI=
-google.golang.org/grpc v1.56.3/go.mod h1:I9bI3vqKfayGqPUAwGdOSu7kt6oIJLixfffKrpXqQ9s=
+google.golang.org/grpc v1.75.1/go.mod h1:JtPAzKiq4v1xcAB2hydNlWI2RnF85XXcV0mhKXr2ecQ=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -712,10 +749,8 @@ google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
-google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -732,6 +767,7 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

internal/app/app.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -39,7 +39,10 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/frontend/theme"
 	"github.com/ProtonMail/proton-bridge/v3/internal/locations"
 	"github.com/ProtonMail/proton-bridge/v3/internal/logging"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/sentry"
+	"github.com/ProtonMail/proton-bridge/v3/internal/services/observability"
+	"github.com/ProtonMail/proton-bridge/v3/internal/unleash"
 	"github.com/ProtonMail/proton-bridge/v3/internal/useragent"
 	"github.com/ProtonMail/proton-bridge/v3/internal/vault"
 	"github.com/ProtonMail/proton-bridge/v3/pkg/keychain"
@@ -285,56 +288,61 @@ func run(c *cli.Context) error {
 							logrus.WithError(err).Error("Failed to get settings path")
 						}
 
+						featureFlags := unleash.GetStartupFeatureFlagsAndStore(constants.APIHost, version, locations.ProvideUnleashStartupCachePath)
+
 						return withSingleInstance(settings, locations.GetLockFile(), version, func() error {
 							// Look for available keychains
 							return WithKeychainList(crashHandler, func(keychains *keychain.List) error {
-								// Unlock the encrypted vault.
+								// Pre-init the observability service, load the cached metrics.
-								return WithVault(reporter, locations, keychains, crashHandler, func(v *vault.Vault, insecure, corrupt bool) error {
+								return observability.WithObservability(locations, func(obsService *observability.Service) error {
-									if !v.Migrated() {
+									// Unlock the encrypted vault.
-										// Migrate old settings into the vault.
+									return WithVault(reporter, locations, keychains, obsService, featureFlags, crashHandler, func(v *vault.Vault, insecure, corrupt bool) error {
-										if err := migrateOldSettings(v); err != nil {
+										if !v.Migrated() {
-											logrus.WithError(err).Error("Failed to migrate old settings")
+											// Migrate old settings into the vault.
-										}
+											if err := migrateOldSettings(v); err != nil {
-
+												logrus.WithError(err).Error("Failed to migrate old settings")
-										// Migrate old accounts into the vault.
-										if err := migrateOldAccounts(locations, keychains, v); err != nil {
-											logrus.WithError(err).Error("Failed to migrate old accounts")
-										}
-
-										// The vault has been migrated.
-										if err := v.SetMigrated(); err != nil {
-											logrus.WithError(err).Error("Failed to mark vault as migrated")
-										}
-									}
-
-									logrus.WithFields(logrus.Fields{
-										"lastVersion": v.GetLastVersion().String(),
-										"showAllMail": v.GetShowAllMail(),
-										"updateCh":    v.GetUpdateChannel(),
-										"autoUpdate":  v.GetAutoUpdate(),
-										"rollout":     v.GetUpdateRollout(),
-										"DoH":         v.GetProxyAllowed(),
-									}).Info("Vault loaded")
-
-									// Load the cookies from the vault.
-									return withCookieJar(v, func(cookieJar http.CookieJar) error {
-										// Create a new bridge instance.
-										return withBridge(c, exe, locations, version, identifier, crashHandler, reporter, v, cookieJar, keychains, func(b *bridge.Bridge, eventCh <-chan events.Event) error {
-											if insecure {
-												logrus.Warn("The vault key could not be retrieved; the vault will not be encrypted")
-												b.PushError(bridge.ErrVaultInsecure)
 											}
 
-											if corrupt {
+											// Migrate old accounts into the vault.
-												logrus.Warn("The vault is corrupt and has been wiped")
+											if err := migrateOldAccounts(locations, keychains, v); err != nil {
-												b.PushError(bridge.ErrVaultCorrupt)
+												logrus.WithError(err).Error("Failed to migrate old accounts")
 											}
 
-											// Remove old updates files
+											// The vault has been migrated.
-											b.RemoveOldUpdates()
+											if err := v.SetMigrated(); err != nil {
+												logrus.WithError(err).Error("Failed to mark vault as migrated")
+											}
+										}
 
-											// Run the frontend.
+										logrus.WithFields(logrus.Fields{
-											return runFrontend(c, crashHandler, restarter, locations, b, eventCh, quitCh, c.Int(flagParentPID))
+											"lastVersion": v.GetLastVersion().String(),
+											"showAllMail": v.GetShowAllMail(),
+											"updateCh":    v.GetUpdateChannel(),
+											"autoUpdate":  v.GetAutoUpdate(),
+											"rollout":     v.GetUpdateRollout(),
+											"DoH":         v.GetProxyAllowed(),
+										}).Info("Vault loaded")
+
+										// Load the cookies from the vault.
+										return withCookieJar(v, func(cookieJar http.CookieJar) error {
+											// Create a new bridge instance.
+											return withBridge(c, exe, locations, version, identifier, obsService, crashHandler, reporter, v, cookieJar, keychains, func(b *bridge.Bridge, eventCh <-chan events.Event) error {
+												if insecure {
+													logrus.Warn("The vault key could not be retrieved; the vault will not be encrypted")
+													b.PushError(bridge.ErrVaultInsecure)
+												}
+
+												if corrupt {
+													logrus.Warn("The vault is corrupt and has been wiped")
+													b.PushError(bridge.ErrVaultCorrupt)
+												}
+
+												// Remove old updates files
+												b.RemoveOldUpdates()
+
+												// Run the frontend.
+												return runFrontend(c, crashHandler, restarter, locations, b, eventCh, quitCh, c.Int(flagParentPID))
+											})
 										})
 									})
 								})
@@ -577,5 +585,5 @@ func setDeviceCookies(jar *cookies.Jar) error {
 }
 
 func onMacOS() bool {
-	return runtime.GOOS == "darwin"
+	return runtime.GOOS == platform.MACOS
 }

internal/app/bridge.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -33,6 +33,7 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/events"
 	"github.com/ProtonMail/proton-bridge/v3/internal/locations"
 	"github.com/ProtonMail/proton-bridge/v3/internal/sentry"
+	"github.com/ProtonMail/proton-bridge/v3/internal/services/observability"
 	"github.com/ProtonMail/proton-bridge/v3/internal/updater"
 	"github.com/ProtonMail/proton-bridge/v3/internal/useragent"
 	"github.com/ProtonMail/proton-bridge/v3/internal/vault"
@@ -52,6 +53,7 @@ func withBridge(
 	locations *locations.Locations,
 	version *semver.Version,
 	identifier *useragent.UserAgent,
+	obsService *observability.Service,
 	crashHandler *crash.Handler,
 	reporter *sentry.Reporter,
 	vault *vault.Vault,
@@ -100,6 +102,7 @@ func withBridge(
 		updater,
 		version,
 		keychains,
+		obsService,
 
 		// The API stuff.
 		constants.APIHost,

internal/app/frontend.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/app/migration.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -138,7 +138,14 @@ func migrateOldAccounts(locations *locations.Locations, keychains *keychain.List
 	if err != nil {
 		return fmt.Errorf("failed to get helper: %w", err)
 	}
-	keychain, _, err := keychain.NewKeychain(helper, "bridge", keychains.GetHelpers(), keychains.GetDefaultHelper())
+
+	keychain, _, err := keychain.NewKeychain(
+		helper, "bridge",
+		keychains.GetHelpers(),
+		keychains.GetDefaultHelper(),
+		0,
+		make(map[string]bool),
+	)
 	if err != nil {
 		return fmt.Errorf("failed to create keychain: %w", err)
 	}

internal/app/migration_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -31,6 +31,7 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/cookies"
 	"github.com/ProtonMail/proton-bridge/v3/internal/legacy/credentials"
 	"github.com/ProtonMail/proton-bridge/v3/internal/locations"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/updater"
 	"github.com/ProtonMail/proton-bridge/v3/internal/vault"
 	"github.com/ProtonMail/proton-bridge/v3/pkg/algo"
@@ -85,7 +86,7 @@ func TestMigratePrefsToVaultWithoutKeys(t *testing.T) {
 
 func TestKeychainMigration(t *testing.T) {
 	// Migration tested only for linux.
-	if runtime.GOOS != "linux" {
+	if runtime.GOOS != platform.LINUX {
 		return
 	}
 
@@ -134,7 +135,13 @@ func TestKeychainMigration(t *testing.T) {
 func TestUserMigration(t *testing.T) {
 	kcl := keychain.NewTestKeychainsList()
 
-	kc, _, err := keychain.NewKeychain("mock", "bridge", kcl.GetHelpers(), kcl.GetDefaultHelper())
+	kc, _, err := keychain.NewKeychain(
+		"mock", "bridge",
+		kcl.GetHelpers(),
+		kcl.GetDefaultHelper(),
+		0,
+		make(map[string]bool),
+	)
 	require.NoError(t, err)
 
 	require.NoError(t, kc.Put("brokenID", "broken"))

internal/app/singleinstance.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/app/vault.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -20,25 +20,31 @@ package app
 import (
 	"crypto/sha256"
 	"encoding/hex"
+	"errors"
 	"fmt"
 	"path"
+	"runtime"
 
 	"github.com/ProtonMail/gluon/async"
 	"github.com/ProtonMail/proton-bridge/v3/internal/certs"
 	"github.com/ProtonMail/proton-bridge/v3/internal/constants"
 	"github.com/ProtonMail/proton-bridge/v3/internal/locations"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/sentry"
+	"github.com/ProtonMail/proton-bridge/v3/internal/services/observability"
+	"github.com/ProtonMail/proton-bridge/v3/internal/unleash"
 	"github.com/ProtonMail/proton-bridge/v3/internal/vault"
+	"github.com/ProtonMail/proton-bridge/v3/internal/vault/observabilitymetrics"
 	"github.com/ProtonMail/proton-bridge/v3/pkg/keychain"
 	"github.com/sirupsen/logrus"
 )
 
-func WithVault(reporter *sentry.Reporter, locations *locations.Locations, keychains *keychain.List, panicHandler async.PanicHandler, fn func(*vault.Vault, bool, bool) error) error {
+func WithVault(reporter *sentry.Reporter, locations *locations.Locations, keychains *keychain.List, obsSender observability.BasicSender, featureFlags unleash.FeatureFlagStartupStore, panicHandler async.PanicHandler, fn func(*vault.Vault, bool, bool) error) error {
 	logrus.Debug("Creating vault")
 	defer logrus.Debug("Vault stopped")
 
 	// Create the encVault.
-	encVault, insecure, corrupt, err := newVault(reporter, locations, keychains, panicHandler)
+	encVault, insecure, corrupt, err := newVault(reporter, locations, keychains, obsSender, featureFlags, panicHandler)
 	if err != nil {
 		return fmt.Errorf("could not create vault: %w", err)
 	}
@@ -60,7 +66,7 @@ func WithVault(reporter *sentry.Reporter, locations *locations.Locations, keycha
 	return fn(encVault, insecure, corrupt != nil)
 }
 
-func newVault(reporter *sentry.Reporter, locations *locations.Locations, keychains *keychain.List, panicHandler async.PanicHandler) (*vault.Vault, bool, error, error) {
+func newVault(reporter *sentry.Reporter, locations *locations.Locations, keychains *keychain.List, obsSender observability.BasicSender, featureFlags unleash.FeatureFlagStartupStore, panicHandler async.PanicHandler) (*vault.Vault, bool, error, error) {
 	vaultDir, err := locations.ProvideSettingsPath()
 	if err != nil {
 		return nil, false, nil, fmt.Errorf("could not get vault dir: %w", err)
@@ -74,7 +80,14 @@ func newVault(reporter *sentry.Reporter, locations *locations.Locations, keychai
 		lastUsedHelper string
 	)
 
-	if key, helper, err := loadVaultKey(vaultDir, keychains); err != nil {
+	if key, helper, err := loadVaultKey(vaultDir, keychains, featureFlags); err != nil {
+		if errors.Is(err, keychain.ErrPreferredKeychainNotAvailable) {
+			if err := vault.IncrementKeychainFailedAttemptCount(vaultDir); err != nil {
+				logrus.WithError(err).Error("Failed to increment failed keychain attempt count")
+			}
+			return &vault.Vault{}, false, nil, err
+		}
+
 		if reporter != nil {
 			if rerr := reporter.ReportMessageWithContext("Could not load/create vault key", map[string]any{
 				"keychainDefaultHelper":       keychains.GetDefaultHelper(),
@@ -90,6 +103,9 @@ func newVault(reporter *sentry.Reporter, locations *locations.Locations, keychai
 
 		// We store the insecure vault in a separate directory
 		vaultDir = path.Join(vaultDir, "insecure")
+
+		// Schedule the relevant observability metric for sending.
+		obsSender.AddMetrics(observabilitymetrics.GenerateVaultKeyFetchGenericErrorMetric())
 	} else {
 		vaultKey = key
 		lastUsedHelper = helper
@@ -103,29 +119,53 @@ func newVault(reporter *sentry.Reporter, locations *locations.Locations, keychai
 
 	userVault, corrupt, err := vault.New(vaultDir, gluonCacheDir, vaultKey, panicHandler)
 	if err != nil {
+		obsSender.AddMetrics(observabilitymetrics.GenerateVaultCreationGenericErrorMetric())
 		return nil, false, corrupt, fmt.Errorf("could not create vault: %w", err)
 	}
 
-	// Remember the last successfully used keychain and store that as the user preference.
+	if corrupt != nil {
-	if err := vault.SetHelper(vaultDir, lastUsedHelper); err != nil {
+		obsSender.AddMetrics(observabilitymetrics.GenerateVaultCreationCorruptErrorMetric())
-		logrus.WithError(err).Error("Could not store last used keychain helper")
+	}
+
+	// Remember the last successfully used keychain on Linux and store that as the user preference.
+	if runtime.GOOS == platform.LINUX {
+		if err := vault.SetHelper(vaultDir, lastUsedHelper); err != nil {
+			logrus.WithError(err).Error("Could not store last used keychain helper")
+		}
+
+		if err := vault.ResetFailedKeychainAttemptCount(vaultDir); err != nil {
+			logrus.WithError(err).Error("Could not reset and save failed keychain attempt count")
+		}
 	}
 
 	return userVault, insecure, corrupt, nil
 }
 
 // loadVaultKey - loads the key used to encrypt the vault alongside the keychain helper used to access it.
-func loadVaultKey(vaultDir string, keychains *keychain.List) (key []byte, keychainHelper string, err error) {
+func loadVaultKey(vaultDir string, keychains *keychain.List, featureFlags unleash.FeatureFlagStartupStore) (key []byte, keychainHelper string, err error) {
 	keychainHelper, err = vault.GetHelper(vaultDir)
 	if err != nil {
 		return nil, keychainHelper, fmt.Errorf("could not get keychain helper: %w", err)
 	}
 
-	kc, keychainHelper, err := keychain.NewKeychain(keychainHelper, constants.KeyChainName, keychains.GetHelpers(), keychains.GetDefaultHelper())
+	keychainFailedAttemptCount, err := vault.GetKeychainFailedAttemptCount(vaultDir)
+	if err != nil {
+		return nil, keychainHelper, fmt.Errorf("could not get keychain failed attempt count: %w", err)
+	}
+
+	kc, keychainHelper, err := keychain.NewKeychain(
+		keychainHelper, constants.KeyChainName,
+		keychains.GetHelpers(),
+		keychains.GetDefaultHelper(),
+		keychainFailedAttemptCount,
+		featureFlags,
+	)
 	if err != nil {
 		return nil, keychainHelper, fmt.Errorf("could not create keychain: %w", err)
 	}
 
+	logrus.WithField("keychainHelper", keychainHelper).Info("Initialized keychain helper")
+
 	key, err = vault.GetVaultKey(kc)
 	if err != nil {
 		if keychain.IsErrKeychainNoItem(err) {
@@ -134,6 +174,12 @@ func loadVaultKey(vaultDir string, keychains *keychain.List) (key []byte, keycha
 			return key, keychainHelper, err
 		}
 
+		if keychain.ShouldRetryPreferredKeychain(featureFlags, keychainHelper) {
+			if keychainFailedAttemptCount < keychain.MaxFailedKeychainAttemptsLinux {
+				return nil, keychainHelper, keychain.PreferredKeychainRetryError(keychainFailedAttemptCount)
+			}
+		}
+
 		return nil, keychainHelper, fmt.Errorf("could not check for vault key: %w", err)
 	}
 

internal/bridge/api.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/api_default.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/api_qa.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/bridge.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -42,6 +42,7 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/events"
 	"github.com/ProtonMail/proton-bridge/v3/internal/focus"
 	"github.com/ProtonMail/proton-bridge/v3/internal/identifier"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/safe"
 	"github.com/ProtonMail/proton-bridge/v3/internal/sentry"
 	"github.com/ProtonMail/proton-bridge/v3/internal/services/imapsmtpserver"
@@ -57,6 +58,7 @@ import (
 	"github.com/bradenaw/juniper/xslices"
 	"github.com/elastic/go-sysinfo/types"
 	"github.com/go-resty/resty/v2"
+	uuid "github.com/google/uuid"
 	"github.com/sirupsen/logrus"
 )
 
@@ -166,6 +168,7 @@ func New(
 	updater Updater, // the updater to fetch and install updates
 	curVersion *semver.Version, // the current version of the bridge
 	keychains *keychain.List, // usable keychains
+	obsService *observability.Service,
 
 	apiURL string, // the URL of the API to use
 	cookieJar http.CookieJar, // the cookie jar to use
@@ -204,6 +207,7 @@ func New(
 		keychains,
 		panicHandler,
 		reporter,
+		obsService,
 
 		api,
 		identifier,
@@ -240,6 +244,7 @@ func newBridge(
 	keychains *keychain.List,
 	panicHandler async.PanicHandler,
 	reporter reporter.Reporter,
+	obsService *observability.Service,
 
 	api *proton.Manager,
 	identifier identifier.Identifier,
@@ -271,9 +276,9 @@ func newBridge(
 		return nil, fmt.Errorf("failed to create focus service: %w", err)
 	}
 
-	unleashService := unleash.NewBridgeService(ctx, api, locator, panicHandler)
+	unleashService := unleash.NewBridgeService(ctx, api, locator, panicHandler, vault.GetFeatureFlagStickyKey())
 
-	observabilityService := observability.NewService(ctx, panicHandler)
+	obsService.Initialize(ctx, panicHandler)
 
 	bridge := &Bridge{
 		vault: vault,
@@ -315,11 +320,11 @@ func newBridge(
 		lastVersion: lastVersion,
 
 		tasks:       tasks,
-		syncService: syncservice.NewService(panicHandler, observabilityService),
+		syncService: syncservice.NewService(panicHandler, obsService),
 
 		unleashService: unleashService,
 
-		observabilityService: observabilityService,
+		observabilityService: obsService,
 
 		notificationStore: notifications.NewStore(locator.ProvideNotificationsCachePath),
 
@@ -334,7 +339,7 @@ func newBridge(
 		reporter,
 		uidValidityGenerator,
 		&bridgeIMAPSMTPTelemetry{b: bridge},
-		observabilityService,
+		obsService,
 		unleashService,
 	)
 
@@ -686,7 +691,7 @@ func (bridge *Bridge) HasAPIConnection() bool {
 // then we verify whether the gluon cache exists using the "new" username (provided by the DB path in this case)
 // if so we modify the cache directory in the user vault.
 func (bridge *Bridge) verifyUsernameChange() {
-	if runtime.GOOS != "darwin" {
+	if runtime.GOOS != platform.MACOS {
 		return
 	}
 
@@ -785,3 +790,7 @@ func (bridge *Bridge) SetHostVersionGetterTest(fn func(host types.Host) string)
 func (bridge *Bridge) SetRolloutPercentageTest(rollout float64) error {
 	return bridge.vault.SetUpdateRollout(rollout)
 }
+
+func (bridge *Bridge) GetFeatureFlagStickyKey() uuid.UUID {
+	return bridge.vault.GetFeatureFlagStickyKey()
+}

internal/bridge/bridge_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -45,6 +45,7 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/focus"
 	"github.com/ProtonMail/proton-bridge/v3/internal/locations"
 	"github.com/ProtonMail/proton-bridge/v3/internal/services/imapsmtpserver"
+	"github.com/ProtonMail/proton-bridge/v3/internal/services/observability"
 	"github.com/ProtonMail/proton-bridge/v3/internal/unleash"
 	"github.com/ProtonMail/proton-bridge/v3/internal/updater"
 	"github.com/ProtonMail/proton-bridge/v3/internal/user"
@@ -56,6 +57,7 @@ import (
 	imapid "github.com/emersion/go-imap-id"
 	"github.com/emersion/go-sasl"
 	"github.com/emersion/go-smtp"
+	"github.com/google/uuid"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/goleak"
 )
@@ -778,6 +780,30 @@ func TestBridge_ChangeCacheDirectory(t *testing.T) {
 	})
 }
 
+func TestBridge_FeatureFlagStickyKey_Persistence(t *testing.T) {
+	var uuidOne uuid.UUID
+	var uuidTwo uuid.UUID
+
+	withEnv(t, func(ctx context.Context, s *server.Server, netCtl *proton.NetCtl, locator bridge.Locator, vaultKey []byte) {
+		withBridge(ctx, t, s.GetHostURL(), netCtl, locator, vaultKey, func(b *bridge.Bridge, _ *bridge.Mocks) {
+			uuidOne = b.GetFeatureFlagStickyKey()
+		})
+		withBridge(ctx, t, s.GetHostURL(), netCtl, locator, vaultKey, func(b *bridge.Bridge, _ *bridge.Mocks) {
+			require.Equal(t, uuidOne, b.GetFeatureFlagStickyKey())
+		})
+	})
+
+	withEnv(t, func(ctx context.Context, s *server.Server, netCtl *proton.NetCtl, locator bridge.Locator, vaultKey []byte) {
+		withBridge(ctx, t, s.GetHostURL(), netCtl, locator, vaultKey, func(b *bridge.Bridge, _ *bridge.Mocks) {
+			uuidTwo = b.GetFeatureFlagStickyKey()
+			require.NotEqual(t, uuidOne, uuidTwo)
+		})
+		withBridge(ctx, t, s.GetHostURL(), netCtl, locator, vaultKey, func(b *bridge.Bridge, _ *bridge.Mocks) {
+			require.Equal(t, uuidTwo, b.GetFeatureFlagStickyKey())
+		})
+	})
+}
+
 func TestBridge_ChangeAddressOrder(t *testing.T) {
 	withEnv(t, func(ctx context.Context, s *server.Server, netCtl *proton.NetCtl, locator bridge.Locator, vaultKey []byte) {
 		// Create a user.
@@ -919,6 +945,7 @@ func withBridgeNoMocks(
 		mocks.Updater,
 		v2_3_0,
 		keychain.NewTestKeychainsList(),
+		observability.NewTestService(),
 
 		// The API stuff.
 		apiURL,

internal/bridge/bug_report.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/configure.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/debug.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/draft_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/errors.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/events.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/heartbeat.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/identifier.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/imap.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/imapsmtp_telemetry.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/keychain.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/locations.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/main_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/mocks/gluon_mocks.go

@@ -88,3 +88,18 @@ func (mr *MockReporterMockRecorder) ReportMessageWithContext(arg0, arg1 interfac
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ReportMessageWithContext", reflect.TypeOf((*MockReporter)(nil).ReportMessageWithContext), arg0, arg1)
 }
+
+
+// ReportWarningWithContext mocks base method.
+func (m *MockReporter) ReportWarningWithContext(arg0 string, arg1 map[string]interface{}) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ReportWarningWithContext", arg0, arg1)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// ReportWarningWithContext indicates an expected call of ReportWarningWithContext.
+func (mr *MockReporterMockRecorder) ReportWarningWithContext(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ReportWarningWithContext", reflect.TypeOf((*MockReporter)(nil).ReportMessageWithContext), arg0, arg1)
+}

internal/bridge/mocks/matcher.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/observability_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/refresh_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/send_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/sentry_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/server_manager_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/settings.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/settings_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/smtp.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/sync_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/sync_unix_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/tls.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/types.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/unleash_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/updates.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -344,7 +344,12 @@ func (bridge *Bridge) installUpdate(ctx context.Context, job installJob) {
 
 		case err != nil:
 			log.WithError(err).Error("The update could not be installed")
-
+			if reporterErr := bridge.reporter.ReportMessageWithContext(
+				"Cannot install update",
+				reporter.Context{"error": err},
+			); reporterErr != nil {
+				log.WithError(reporterErr).Error("Failed to report update error")
+			}
 			bridge.publish(events.UpdateFailed{
 				Release: job.Release,
 				Silent:  job.Silent,

internal/bridge/updates_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -28,6 +28,7 @@ import (
 	"github.com/ProtonMail/go-proton-api/server"
 	bridgePkg "github.com/ProtonMail/proton-bridge/v3/internal/bridge"
 	"github.com/ProtonMail/proton-bridge/v3/internal/events"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/updater"
 	"github.com/ProtonMail/proton-bridge/v3/internal/updater/versioncompare"
 	"github.com/elastic/go-sysinfo/types"
@@ -331,7 +332,7 @@ func Test_Update_CheckOSVersion_NoUpdate(t *testing.T) {
 
 			bridge.CheckForUpdates()
 
-			if runtime.GOOS == "darwin" {
+			if runtime.GOOS == platform.MACOS {
 				require.Equal(t, events.UpdateNotAvailable{}, <-updateNotAvailableCh)
 			} else {
 				require.Equal(t, events.UpdateInstalled{
@@ -442,7 +443,7 @@ func Test_Update_CheckOSVersion_HasUpdate(t *testing.T) {
 
 			bridge.CheckForUpdates()
 
-			if runtime.GOOS == "darwin" {
+			if runtime.GOOS == platform.MACOS {
 				require.Equal(t, events.UpdateInstalled{
 					Release: expectedUpdateRelease,
 					Silent:  true,

internal/bridge/user.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/user_event_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -37,6 +37,7 @@ import (
 	"github.com/ProtonMail/proton-bridge/v3/internal/bridge"
 	"github.com/ProtonMail/proton-bridge/v3/internal/constants"
 	"github.com/ProtonMail/proton-bridge/v3/internal/events"
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 	"github.com/ProtonMail/proton-bridge/v3/internal/user"
 	"github.com/bradenaw/juniper/stream"
 	"github.com/bradenaw/juniper/xslices"
@@ -77,7 +78,7 @@ func TestBridge_User_RefreshEvent(t *testing.T) {
 		withBridge(ctx, t, s.GetHostURL(), netCtl, locator, storeKey, func(bridge *bridge.Bridge, _ *bridge.Mocks) {
 			syncCh, closeCh := chToType[events.Event, events.SyncFinished](bridge.GetEvents(events.SyncFinished{}))
 
-			if runtime.GOOS != "windows" {
+			if runtime.GOOS != platform.WINDOWS {
 				require.Equal(t, userID, (<-syncCh).UserID)
 			}
 			require.Equal(t, userID, (<-syncCh).UserID)

internal/bridge/user_events.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/bridge/user_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/cert_store_darwin.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/cert_store_darwin_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/cert_store_linux.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/cert_store_windows.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/installer.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/tls.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/certs/tls_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/clientconfig/applemail.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/clientconfig/applemail_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/constants/constants.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //
@@ -21,6 +21,8 @@ package constants
 import (
 	"fmt"
 	"runtime"
+
+	"github.com/ProtonMail/proton-bridge/v3/internal/platform"
 )
 
 const VendorName = "protonmail"
@@ -72,13 +74,13 @@ const (
 // nolint:goconst
 func getAPIOS() string {
 	switch runtime.GOOS {
-	case "darwin":
+	case platform.MACOS:
 		return "macos"
 
-	case "linux":
+	case platform.LINUX:
 		return "linux"
 
-	case "windows":
+	case platform.WINDOWS:
 		return "windows"
 
 	default:

internal/constants/host_default.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/constants/host_qa.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/constants/update_default.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/constants/update_qa.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/constants/version_default.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //

internal/constants/version_qa.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/constants/version_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //

internal/cookies/jar.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/cookies/jar_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/crash/actions.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/crash/handler.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/crash/handler_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/dialer/dialer_basic.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //
@@ -22,6 +22,8 @@ import (
 	"crypto/tls"
 	"net"
 	"net/http"
+	"net/url"
+	"strings"
 	"time"
 )
 
@@ -29,6 +31,11 @@ type TLSDialer interface {
 	DialTLSContext(ctx context.Context, network, address string) (conn net.Conn, err error)
 }
 
+type SecureTLSDialer interface {
+	DialTLSContext(ctx context.Context, network, address string) (conn net.Conn, err error)
+	ShouldSkipCertificateChainVerification(address string) bool
+}
+
 func SetBasicTransportTimeouts(t *http.Transport) {
 	t.MaxIdleConns = 100
 	t.MaxIdleConnsPerHost = 100
@@ -71,6 +78,35 @@ func NewBasicTLSDialer(hostURL string) *BasicTLSDialer {
 	}
 }
 
+func extractDomain(hostname string) string {
+	parts := strings.Split(hostname, ".")
+	if len(parts) >= 2 {
+		return strings.Join(parts[len(parts)-2:], ".")
+	}
+	return hostname
+}
+
+// ShouldSkipCertificateChainVerification determines whether certificate chain validation should be skipped.
+// It compares the domain of the requested address with the configured host URL domain.
+// Returns true if the domains don't match (skip verification), false if they do (perform verification).
+//
+// NOTE: This assumes single-part TLDs (.com, .me) and won't handle multi-part TLDs correctly.
+func (d *BasicTLSDialer) ShouldSkipCertificateChainVerification(address string) bool {
+	parsedURL, err := url.Parse(d.hostURL)
+	if err != nil {
+		return true
+	}
+
+	addressHost, _, err := net.SplitHostPort(address)
+	if err != nil {
+		addressHost = address
+	}
+
+	hostDomain := extractDomain(parsedURL.Host)
+	addressDomain := extractDomain(addressHost)
+	return addressDomain != hostDomain
+}
+
 // DialTLSContext returns a connection to the given address using the given network.
 func (d *BasicTLSDialer) DialTLSContext(ctx context.Context, network, address string) (conn net.Conn, err error) {
 	return (&tls.Dialer{
@@ -78,7 +114,7 @@ func (d *BasicTLSDialer) DialTLSContext(ctx context.Context, network, address st
 			Timeout: 30 * time.Second,
 		},
 		Config: &tls.Config{
-			InsecureSkipVerify: address != d.hostURL, //nolint:gosec
+			InsecureSkipVerify: d.ShouldSkipCertificateChainVerification(address), //nolint:gosec
 		},
 	}).DialContext(ctx, network, address)
 }

internal/dialer/dialer_basic_test.go

@@ -0,0 +1,134 @@
+// Copyright (c) 2026 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Proton Mail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package dialer
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestBasicTLSDialer_ShouldSkipCertificateChainVerification(t *testing.T) {
+	tests := []struct {
+		hostURL  string
+		address  string
+		expected bool
+	}{
+		{
+			hostURL:  "https://mail-api.proton.me",
+			address:  "mail-api.proton.me:443",
+			expected: false,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "proton.me",
+			expected: false,
+		},
+		{
+			hostURL:  "https://api.proton.me",
+			address:  "mail.proton.me:443",
+			expected: false,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "mail-api.proton.me:443",
+			expected: false,
+		},
+		{
+			hostURL:  "https://mail-api.proton.me",
+			address:  "proton.me:443",
+			expected: false,
+		},
+		{
+			hostURL:  "https://mail.google.com",
+			address:  "mail-api.proton.me:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://mail-api.protonmail.com",
+			address:  "mail-api.proton.me:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "google.com:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "proton.com:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "example.me:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "mail.example.com:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://proton.me",
+			address:  "proton.me",
+			expected: false,
+		},
+		{
+			hostURL:  "https://proton.me:8080",
+			address:  "proton.me:443",
+			expected: true,
+		},
+		{
+			hostURL:  "https://proton.me/api/v1",
+			address:  "proton.me:443",
+			expected: false,
+		},
+		{
+			hostURL:  "https://proton.black",
+			address:  "mail-api.pascal.proton.black",
+			expected: false,
+		},
+		{
+			hostURL:  "https://mail-api.pascal.proton.black",
+			address:  "mail-api.pascal.proton.black",
+			expected: false,
+		},
+		{
+			hostURL:  "https://mail-api.pascal.proton.black",
+			address:  "proton.black:332",
+			expected: false,
+		},
+		{
+			hostURL:  "https://mail-api.pascal.proton.black",
+			address:  "proton.me",
+			expected: true,
+		},
+		{
+			hostURL:  "https://mail-api.pascal.proton.black",
+			address:  "proton.me:332",
+			expected: true,
+		},
+	}
+
+	for _, tt := range tests {
+		dialer := NewBasicTLSDialer(tt.hostURL)
+		result := dialer.ShouldSkipCertificateChainVerification(tt.address)
+		require.Equal(t, tt.expected, result)
+	}
+}

internal/dialer/dialer_pinning.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -50,12 +50,12 @@ var TrustedAPIPins = []string{ //nolint:gochecknoglobals
 }
 
 // TLSReportURI is the address where TLS reports should be sent.
-const TLSReportURI = "https://reports.protonmail.ch/reports/tls"
+const TLSReportURI = "https://reports.proton.me/reports/tls"
 
 // PinningTLSDialer wraps a TLSDialer to check fingerprints after connecting and
 // to report errors if the fingerprint check fails.
 type PinningTLSDialer struct {
-	dialer     TLSDialer
+	dialer     SecureTLSDialer
 	pinChecker PinChecker
 	reporter   Reporter
 	tlsIssueCh chan struct{}
@@ -68,13 +68,13 @@ type Reporter interface {
 
 // PinChecker is used to check TLS keys of connections.
 type PinChecker interface {
-	CheckCertificate(conn net.Conn) error
+	CheckCertificate(conn net.Conn, certificateChainVerificationSkipped bool) error
 }
 
 // NewPinningTLSDialer constructs a new dialer which only returns TCP connections to servers
 // which present known certificates.
 // It checks pins using the given pinChecker and reports issues using the given reporter.
-func NewPinningTLSDialer(dialer TLSDialer, reporter Reporter, pinChecker PinChecker) *PinningTLSDialer {
+func NewPinningTLSDialer(dialer SecureTLSDialer, reporter Reporter, pinChecker PinChecker) *PinningTLSDialer {
 	return &PinningTLSDialer{
 		dialer:     dialer,
 		pinChecker: pinChecker,
@@ -85,6 +85,7 @@ func NewPinningTLSDialer(dialer TLSDialer, reporter Reporter, pinChecker PinChec
 
 // DialTLSContext dials the given network/address, returning an error if the certificates don't match the trusted pins.
 func (p *PinningTLSDialer) DialTLSContext(ctx context.Context, network, address string) (net.Conn, error) {
+	shouldSkipCertificateChainVerification := p.dialer.ShouldSkipCertificateChainVerification(address)
 	conn, err := p.dialer.DialTLSContext(ctx, network, address)
 	if err != nil {
 		return nil, err
@@ -95,7 +96,7 @@ func (p *PinningTLSDialer) DialTLSContext(ctx context.Context, network, address
 		return nil, err
 	}
 
-	if err := p.pinChecker.CheckCertificate(conn); err != nil {
+	if err := p.pinChecker.CheckCertificate(conn, shouldSkipCertificateChainVerification); err != nil {
 		if tlsConn, ok := conn.(*tls.Conn); ok && p.reporter != nil {
 			p.reporter.ReportCertIssue(TLSReportURI, host, port, tlsConn.ConnectionState())
 		}

internal/dialer/dialer_pinning_checker.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //
@@ -41,3 +41,15 @@ func NewTLSPinChecker(trustedPins []string) *TLSPinChecker {
 func certFingerprint(cert *x509.Certificate) string {
 	return fmt.Sprintf(`pin-sha256=%q`, algo.HashBase64SHA256(string(cert.RawSubjectPublicKeyInfo)))
 }
+
+func (p *TLSPinChecker) isCertFoundInKnownPins(cert *x509.Certificate) bool {
+	fingerprint := certFingerprint(cert)
+
+	for _, pin := range p.trustedPins {
+		if pin == fingerprint {
+			return true
+		}
+	}
+
+	return false
+}

internal/dialer/dialer_pinning_checker_default.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //
@@ -25,8 +25,8 @@ import (
 	"net"
 )
 
-// CheckCertificate returns whether the connection presents a known TLS certificate.
+// CheckCertificate verifies that the connection presents a known pinned leaf TLS certificate.
-func (p *TLSPinChecker) CheckCertificate(conn net.Conn) error {
+func (p *TLSPinChecker) CheckCertificate(conn net.Conn, certificateChainVerificationSkipped bool) error {
 	tlsConn, ok := conn.(*tls.Conn)
 	if !ok {
 		return errors.New("connection is not a TLS connection")
@@ -34,14 +34,31 @@ func (p *TLSPinChecker) CheckCertificate(conn net.Conn) error {
 
 	connState := tlsConn.ConnectionState()
 
-	for _, peerCert := range connState.PeerCertificates {
+	// When certificate chain verification is enabled (e.g., for known API hosts), we expect the TLS handshake to produce verified chains.
-		fingerprint := certFingerprint(peerCert)
+	// We then validate that the leaf certificate of at least one verified chain matches a known pinned public key.
+	if !certificateChainVerificationSkipped {
+		if len(connState.VerifiedChains) == 0 {
+			return errors.New("no verified certificate chains")
+		}
 
-		for _, pin := range p.trustedPins {
+		for _, chain := range connState.VerifiedChains {
-			if pin == fingerprint {
+			// Check if the leaf certificate is one of the trusted pins.
+			if p.isCertFoundInKnownPins(chain[0]) {
 				return nil
 			}
 		}
+
+		return ErrTLSMismatch
+	}
+
+	// When certificate chain verification is skipped (e.g., for DoH proxies using self-signed certs),
+	// we only validate the leaf certificate against known pinned public keys.
+	if len(connState.PeerCertificates) == 0 {
+		return errors.New("no peer certificates available")
+	}
+
+	if p.isCertFoundInKnownPins(connState.PeerCertificates[0]) {
+		return nil
 	}
 
 	return ErrTLSMismatch

internal/dialer/dialer_pinning_checker_qa.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //
@@ -23,6 +23,6 @@ import "net"
 
 // CheckCertificate returns whether the connection presents a known TLS certificate.
 // The QA implementation always returns nil.
-func (p *TLSPinChecker) CheckCertificate(conn net.Conn) error {
+func (p *TLSPinChecker) CheckCertificate(conn net.Conn, _ bool) error {
 	return nil
 }

internal/dialer/dialer_pinning_report.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //

internal/dialer/dialer_pinning_reporter.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //

internal/dialer/dialer_pinning_reporter_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //

internal/dialer/dialer_pinning_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //
@@ -64,8 +64,7 @@ func TestTLSPinInvalid(t *testing.T) {
 	checkTLSIssueHandler(t, 1, called)
 }
 
-// Disabled for now we'll need to patch this up.
+func TestTLSPinNoMatch(t *testing.T) {
-func _TestTLSPinNoMatch(t *testing.T) { //nolint:unused
 	skipIfProxyIsSet(t)
 
 	called, _, reporter, checker, cm := createClientWithPinningDialer(getRootURL())
@@ -91,12 +90,22 @@ func TestTLSSignedCertWrongPublicKey(t *testing.T) {
 	r.Error(t, err, "expected dial to fail because of wrong public key")
 }
 
+/*
+For the following test the SSL pin rotates from time to time. Thus, the pin needs to be updated accordingly.
+A new pin can be extracted by running the following command:
+
+		echo | openssl s_client -connect rsa4096.badssl.com:443 2>/dev/null | \
+	  	openssl x509 -pubkey -noout | \
+		openssl pkey -pubin -outform DER | \
+		openssl dgst -sha256 -binary | \
+		base64
+*/
 func TestTLSSignedCertTrustedPublicKey(t *testing.T) {
 	skipIfProxyIsSet(t)
 
 	_, dialer, _, checker, _ := createClientWithPinningDialer("")
 	copyTrustedPins(checker)
-	checker.trustedPins = append(checker.trustedPins, `pin-sha256="FlvTPG/nIMKtOj9nelnEjujwSZ5EDyfiKYxZgbXREls="`)
+	checker.trustedPins = append(checker.trustedPins, `pin-sha256="GGNnH/+pMnSFwy6vEDvfi5TRVWMpC5IINu3BHRM1c4E="`)
 	_, err := dialer.DialTLSContext(context.Background(), "tcp", "rsa4096.badssl.com:443")
 	r.NoError(t, err, "expected dial to succeed because public key is known and cert is signed by CA")
 }

internal/dialer/dialer_proxy.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.Bridge.
 //

internal/dialer/dialer_proxy_provider.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/dialer/dialer_proxy_provider_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/dialer/dialer_proxy_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //

internal/dialer/dialer_test.go

@@ -1,4 +1,4 @@
-// Copyright (c) 2025 Proton AG
+// Copyright (c) 2026 Proton AG
 //
 // This file is part of Proton Mail Bridge.
 //