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+# Release Instructions
+
+These are the steps to create a new onnxruntime-swift-package-manager release.
+Typically, an onnxruntime-swift-package-manager release will follow soon after an onnxruntime release.
+
+## 1. Sync onnxruntime Objective-C source files
+
+Check out the corresponding onnxruntime release version, i.e., a release tag.
+```
+cd <onnxruntime repo>
+git checkout <release tag, e.g., v1.20.0>
+```
+
+Sync the onnxruntime Objective-C source files.
+```
+# Replace objectivec directory.
+rm -r <onnxruntime-swift-package-manager repo>/objectivec
+cp -r <onnxruntime repo>/objectivec <onnxruntime-swift-package-manager repo>/objectivec
+```
+
+
+## 2. Update dependency versions in Package.swift
+
+Find the onnxruntime and onnxruntime-extensions binary target configuration in the Package.swift file. For example:
+
+https://github.com/microsoft/onnxruntime-swift-package-manager/blob/bbc428e168a0374eb7d0503cdb7c73fdc1d99751/Package.swift#L98-L104
+
+https://github.com/microsoft/onnxruntime-swift-package-manager/blob/bbc428e168a0374eb7d0503cdb7c73fdc1d99751/Package.swift#L110-L116
+
+```swift
+    // ORT release
+    package.targets.append(
+       Target.binaryTarget(name: "onnxruntime",
+                           url: "https://download.onnxruntime.ai/pod-archive-onnxruntime-c-1.19.2.zip",
+                           //                                                              ^^^^^^ Update version
+                           // SHA256 checksum
+                           checksum: "28787ee2f966a2c47eb293322c733c5dc4b5e3327cec321c1fe31a7c698edf68")
+                           //         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Update checksum
+    )
+```
+
+Update the version in the URL and checksum for both onnxruntime and onnxruntime-extensions targets.
+To get the checksum value, download the file from the updated URL and compute its SHA256 checksum.
+
+To compute a SHA256 checksum on Linux or MacOS:
+```
+sha256sum pod-archive-onnxruntime-c-x.y.z.zip
+```
+
+To compute a SHA256 checksum on Windows with Powershell:
+```
+(Get-FileHash -Algorithm SHA256 pod-archive-onnxruntime-c-x.y.z.zip).Hash.ToLower()
+```
+
+
+## 3. Check in updates and create a release
+
+Note: This repo is updated relatively infrequently, so we currently do not have a release process that uses a separate release branch.
+
+Check in the changes made in the previous steps to the `main` branch.
+
+Create a release tag from the `main` branch.
+
+The tag should match the tag of the corresponding onnxruntime release excluding the leading `v` in order to make it a valid semantic version string.
+E.g., for onnxruntime tag `v1.20.0`, the onnxruntime-swift-package-manager tag should be `1.20.0`.