chore!: Flutter Major Release v6

.changeset/v6-hide-serialization.md

@@ -0,0 +1,5 @@
+---
+"posthog_flutter": major
+---
+
+- **Breaking:** remove `toMap()` from the config classes and `PostHogFeatureFlagResult.fromMap()` from the public API — they serialize the internal platform-channel wire format and were never meant for app code

.changeset/v6-platform-opt-in-out.md

@@ -0,0 +1,5 @@
+---
+"posthog_flutter": major
+---
+
+- **Breaking:** rename `enable()`/`disable()` to `optIn()`/`optOut()` on `PosthogFlutterPlatformInterface`, `PosthogFlutterIO` and `PosthogFlutterWeb`. Update direct calls to these platform classes, custom implementations, and test fakes/mocks. Calls to `Posthog().optIn()`/`optOut()` are unchanged

.changeset/v6-remove-5x-deprecations.md

@@ -0,0 +1,6 @@
+---
+"posthog_flutter": major
+---
+
+- **Breaking:** remove `Posthog().enable()` and `Posthog().disable()` — use `optIn()` and `optOut()`
+- **Breaking:** remove `PostHogConfig.sendFeatureFlagEvents` — use `sendFeatureFlagEvent`

.changeset/v6-remove-deprecated-apis.md

@@ -0,0 +1,10 @@
+---
+"posthog_flutter": major
+---
+
+- **Breaking:** bump minimum iOS deployment target from 13.0 to 15.0 and macOS from 10.15 to 11.0
+- **Breaking:** remove `PostHogConfig.apiKey` and the `com.posthog.posthog.API_KEY` manifest/Info.plist key — use `projectToken` and `com.posthog.posthog.PROJECT_TOKEN`
+- **Breaking:** remove `Posthog().getFeatureFlagPayload()` — use `getFeatureFlagResult(key, sendFeatureFlagEvent: false)` and read `payload`
+- **Breaking:** remove the `PostHogSessionReplayConfig.debouncerDelay` setter — use `PostHogSessionReplayConfig.throttleDelay`
+- **Breaking:** remove `PostHogDataMode.cellular` — use `PostHogDataMode.any`, which it always behaved like
+- Declare Android `minSdkVersion` 23 to match `posthog-android`, which has required it since 3.39.0. Apps on minSdk 21 or 22 already could not build with this plugin, so nothing changes for them

.changeset/v6-send-feature-flag-event-param.md

@@ -0,0 +1,5 @@
+---
+"posthog_flutter": major
+---
+
+- **Breaking:** `getFeatureFlagResult(sendEvent:)` is now `getFeatureFlagResult(sendFeatureFlagEvent:)`, matching `PostHogConfig.sendFeatureFlagEvent` and the native SDKs

.github/workflows/codeql.yml

@@ -24,7 +24,7 @@ jobs:
             runner: ubuntu-latest
           - language: swift
             build-mode: manual
-            runner: macos-15-xlarge
+            runner: macos-26
           - language: actions
             build-mode: none
             runner: ubuntu-latest
@@ -45,7 +45,7 @@ jobs:
         if: matrix.language == 'swift'
         uses: maxim-lobanov/setup-xcode@ed7a3b1fda3918c0306d1b724322adc0b8cc0a90 # v1.7.0
         with:
-          xcode-version: '16.4'
+          xcode-version: '26.4'
 
       - name: Install dependencies (Swift)
         if: matrix.language == 'swift'