diff --git a/INTEGRATION.md b/INTEGRATION.md
index dcbd295..8a4428d 100644
--- a/INTEGRATION.md
+++ b/INTEGRATION.md
@@ -8,9 +8,9 @@ identically — see [`conformance/CONTRACT.md`](conformance/CONTRACT.md).
 
 ---
 
-## Install — 0.3.0 beta (public, no auth)
+## Install — 0.4.0 beta (public, no auth)
 
-Distributed publicly from **[`3HL-SCORE/public-sdks-score`](https://git.3halves-labs.com/3HL-SCORE/public-sdks-score)** (#284) — **no Gitea token / login required**. The iOS XCFramework is a public **release asset** (`mobile-v0.3.0`) on that repo; the Android artifacts live in the org's **Gitea Maven package registry** (anonymous read).
+Distributed publicly from **[`3HL-SCORE/public-sdks-score`](https://git.3halves-labs.com/3HL-SCORE/public-sdks-score)** (#284) — **no Gitea token / login required**. The iOS XCFramework is a public **release asset** (`mobile-v0.4.0`) on that repo; the Android artifacts live in the org's **Gitea Maven package registry** (anonymous read).
 
 ### Android — Gradle (public Maven registry)
 ```kotlin
@@ -18,7 +18,7 @@ repositories {
     maven { url = uri("https://git.3halves-labs.com/api/packages/3HL-SCORE/maven") } // public — no credentials
 }
 dependencies {
-    implementation("com.threehalveslabs.scoretracker:shared-android:0.3.0")
+    implementation("com.threehalveslabs.scoretracker:shared-android:0.4.0")
 }
 ```
 
@@ -34,17 +34,17 @@ add it by **git URL** — no registry config, no login:
 ```swift
 // your app's Package.swift
 dependencies: [
-    .package(url: "https://git.3halves-labs.com/3HL-SCORE/public-sdks-score.git", from: "0.3.0")
+    .package(url: "https://git.3halves-labs.com/3HL-SCORE/public-sdks-score.git", from: "0.4.0")
 ],
 // target: .product(name: "ScoreTracker", package: "public-sdks-score")
 ```
 Or in Xcode: **File → Add Packages…** → paste the URL. The binary `ScoreTrackerKit`
-target pulls the XCFramework from the **public** `mobile-v0.3.0` release asset (SPM
+target pulls the XCFramework from the **public** `mobile-v0.4.0` release asset (SPM
 verifies the checksum) — no `~/.netrc` credentials needed. Verified with an
 anonymous `swift package resolve`.
 
 ### iOS — direct XCFramework
-Download `ScoreTracker-pod.zip` from the **mobile-v0.3.0** release on
+Download `ScoreTracker-pod.zip` from the **mobile-v0.4.0** release on
 [`public-sdks-score`](https://git.3halves-labs.com/3HL-SCORE/public-sdks-score/releases).
 It holds `ScoreTrackerKit.xcframework` and the Swift facade sources
 (`Sources/ScoreTracker/`: `ScoreClient.swift`, `Exports.swift`, `AppLifecycle.swift`).
@@ -220,6 +220,27 @@ score.setTokenProvider { credentialsManager.awaitCredentials().accessToken }
 score.identify("auth0|abc123")
 ```
 
+### Signing in: traits and replay (#488)
+
+`identify` takes the fan's traits, sent on an `identify` event (consent-gated
+and PII-scrubbed like any props). Pass `replayAnonymousEvents` to re-send the
+events the app already sent while the fan was signed out, now with the fan
+attached, so a poll vote cast before sign-in still earns its karma:
+
+```swift
+score.identify(userId: "auth0|abc123", traits: ["team": "urc-leinster"], replayAnonymousEvents: true)
+```
+```kotlin
+score.identify("auth0|abc123", traits = mapOf("team" to "urc-leinster"), replayAnonymousEvents = true)
+```
+
+Replay is opt-in. It re-sends at most the last 100 anonymously sent events
+(`identifyReplayBufferSize` on the factory / `ScoreClient` init), only those
+current consent still allows, marked `_backfill: true` with `_originalEventId`.
+Events still waiting in the queue aren't replayed: they go out with the fan on
+the next flush. The buffer lives in memory only, so it's empty after a cold
+start.
+
 How the provider is used:
 - **Before each flush**, and **single-flight**: overlapping flushes share one
   in-flight call instead of starting several.
diff --git a/Package.swift b/Package.swift
index 393a791..18adba4 100644
--- a/Package.swift
+++ b/Package.swift
@@ -15,8 +15,8 @@ let package = Package(
     targets: [
         .binaryTarget(
             name: "ScoreTrackerKit",
-            url: "https://git.3halves-labs.com/3HL-SCORE/public-sdks-score/releases/download/mobile-v0.3.0/ScoreTrackerKit.xcframework.zip",
-            checksum: "81edf75ed592ef2b4cf17af8aea406333cebba62b2e5b69c28e386e8bc415a7d"
+            url: "https://git.3halves-labs.com/3HL-SCORE/public-sdks-score/releases/download/mobile-v0.4.0/ScoreTrackerKit.xcframework.zip",
+            checksum: "7a900bb0b672188f1bd994aa9161817f6318d2746a4c32c4a56ca95a27392ade"
         ),
         .target(
             name: "ScoreTracker",
diff --git a/README.md b/README.md
index f392973..e6d7ed0 100644
--- a/README.md
+++ b/README.md
@@ -9,13 +9,13 @@ Public, auth-free distribution of the **Score mobile tracker** SDKs for iOS and
 
 > This repo hosts the **consumable artifacts** (release assets + package manifests). The SDK source lives in 3 Halves Labs' private platform repo.
 
-## Install — 0.3.0 (no token / login required)
+## Install — 0.4.0 (no token / login required)
 
 ### iOS — Swift Package Manager
 Add this repo by git URL. There's no registry to configure and no login.
 ```swift
 // Package.swift
-dependencies: [ .package(url: "https://git.3halves-labs.com/3HL-SCORE/public-sdks-score.git", from: "0.3.0") ]
+dependencies: [ .package(url: "https://git.3halves-labs.com/3HL-SCORE/public-sdks-score.git", from: "0.4.0") ]
 // target: .product(name: "ScoreTracker", package: "public-sdks-score")
 ```
 Or in Xcode: **File → Add Packages…** and paste the URL. (The old Swift package
@@ -29,7 +29,7 @@ pod 'ScoreTracker',
 ```
 
 ### iOS — direct XCFramework
-Download `ScoreTracker-pod.zip` from the [`mobile-v0.3.0` release](https://git.3halves-labs.com/3HL-SCORE/public-sdks-score/releases). It contains `ScoreTrackerKit.xcframework` plus the Swift facade sources (`Sources/ScoreTracker/`). Drag the framework into Xcode and add the Swift files to your app target.
+Download `ScoreTracker-pod.zip` from the [`mobile-v0.4.0` release](https://git.3halves-labs.com/3HL-SCORE/public-sdks-score/releases). It contains `ScoreTrackerKit.xcframework` plus the Swift facade sources (`Sources/ScoreTracker/`). Drag the framework into Xcode and add the Swift files to your app target.
 
 ### Android — Gradle
 ```kotlin
@@ -37,7 +37,7 @@ repositories {
     maven { url = uri("https://git.3halves-labs.com/api/packages/3HL-SCORE/maven") } // public — no credentials
 }
 dependencies {
-    implementation("com.threehalveslabs.scoretracker:shared-android:0.3.0")
+    implementation("com.threehalveslabs.scoretracker:shared-android:0.4.0")
 }
 ```
 
diff --git a/ScoreTracker.podspec b/ScoreTracker.podspec
index 4459bfe..dc0a265 100644
--- a/ScoreTracker.podspec
+++ b/ScoreTracker.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'ScoreTracker'
-  s.version          = '0.3.0'
+  s.version          = '0.4.0'
   s.summary          = 'Score mobile tracker (iOS) — KMP shared core + Swift facade.'
   s.description      = <<-DESC
     Lightweight app analytics / fan-engagement tracker. Emits the same event
diff --git a/Sources/ScoreTracker/ScoreClient.swift b/Sources/ScoreTracker/ScoreClient.swift
index 783e71f..6a2e57a 100644
--- a/Sources/ScoreTracker/ScoreClient.swift
+++ b/Sources/ScoreTracker/ScoreClient.swift
@@ -30,7 +30,8 @@ public final class ScoreClient {
         locale: String? = nil,
         initialConsent: ConsentState = ConsentState.companion.NONE,
         pii: PiiOptions? = nil,
-        tokenRefreshTimeoutSeconds: Double = 5
+        tokenRefreshTimeoutSeconds: Double = 5,
+        identifyReplayBufferSize: Int = 100
     ) {
         let config = TrackerConfig(
             publishableKey: publishableKey,
@@ -42,7 +43,8 @@ public final class ScoreClient {
             config: config,
             initialConsent: initialConsent,
             pii: pii,
-            tokenRefreshTimeoutMs: Int64(tokenRefreshTimeoutSeconds * 1000)
+            tokenRefreshTimeoutMs: Int64(tokenRefreshTimeoutSeconds * 1000),
+            identifyReplayBufferSize: Int32(identifyReplayBufferSize)
         )
     }
 
@@ -82,8 +84,19 @@ public final class ScoreClient {
 
     // MARK: - Identity / Auth0
 
-    public func identify(userId: String, token: String? = nil) {
-        tracker.identify(userId: userId, token: token)
+    /// Bind events to the fan (#488). Sends an `identify` event carrying
+    /// `traits` (consent-gated and PII-scrubbed like any props). With
+    /// `replayAnonymousEvents`, events already sent before sign-in are re-sent
+    /// with the fan attached, marked `_backfill`, so a vote cast while signed
+    /// out earns its karma. Events still queued need no replay: they go out
+    /// with the user on the next flush.
+    public func identify(
+        userId: String,
+        token: String? = nil,
+        traits: [String: Any] = [:],
+        replayAnonymousEvents: Bool = false
+    ) {
+        tracker.identify(userId: userId, token: token, traits: traits, replayAnonymousEvents: replayAnonymousEvents)
     }
     public func setToken(_ token: String?) { tracker.setToken(token: token) }