diff --git a/orx-jvm/orx-git-archiver/src/main/kotlin/GitArchiver.kt b/orx-jvm/orx-git-archiver/src/main/kotlin/GitArchiver.kt
index 005f070f..03106413 100644
--- a/orx-jvm/orx-git-archiver/src/main/kotlin/GitArchiver.kt
+++ b/orx-jvm/orx-git-archiver/src/main/kotlin/GitArchiver.kt
@@ -5,9 +5,17 @@ import org.openrndr.AssetMetadata
 import org.openrndr.Extension
 import org.openrndr.Program
 
-internal interface GitProvider {
+interface GitProvider {
     fun commitChanges(commitMessage: String)
     fun headReference(): String
+    fun logReferences(count: Int): List<String>
+    fun show(reference: String) : String
+
+    companion object {
+        fun create() : GitProvider {
+            return if (nativeGitInstalled()) NativeGit() else JavaGit()
+        }
+    }
 }
 
 val logger = KotlinLogging.logger { }
@@ -20,7 +28,7 @@ class GitArchiver : Extension {
 
     var autoCommitMessage = "auto commit"
 
-    private val git: GitProvider = if (nativeGitInstalled()) NativeGit() else JavaGit()
+    private val git: GitProvider = GitProvider.create()
 
     override fun setup(program: Program) {
         logger.info {
@@ -33,6 +41,8 @@ class GitArchiver : Extension {
             }"
         }
 
+        autoCommitMessage = "auto commit from ${program.name}"
+
         val oldMetadataFunction = program.assetMetadata
         program.assetMetadata = {
             val oldMetadata = oldMetadataFunction()
diff --git a/orx-jvm/orx-git-archiver/src/main/kotlin/JavaGit.kt b/orx-jvm/orx-git-archiver/src/main/kotlin/JavaGit.kt
index 9123d6d8..7b1cca9b 100644
--- a/orx-jvm/orx-git-archiver/src/main/kotlin/JavaGit.kt
+++ b/orx-jvm/orx-git-archiver/src/main/kotlin/JavaGit.kt
@@ -24,13 +24,11 @@ class JavaGit : GitProvider {
         return id.name.take(7)
     }
 
-//    fun tag(name: String): Boolean {
-//        val existing = git.tagList().call().find { it.name == name }
-//        if (existing != null) {
-//            git.tag().setName(name).call()
-//        } else {
-//            logger.warn { "tag $name exists" }
-//        }
-//        return existing != null
-//    }
+    override fun logReferences(count: Int): List<String> {
+        TODO("Not yet implemented")
+    }
+
+    override fun show(reference: String): String {
+        TODO("Not yet implemented")
+    }
 }
\ No newline at end of file
diff --git a/orx-jvm/orx-git-archiver/src/main/kotlin/NativeGit.kt b/orx-jvm/orx-git-archiver/src/main/kotlin/NativeGit.kt
index e10bc086..47ee0e58 100644
--- a/orx-jvm/orx-git-archiver/src/main/kotlin/NativeGit.kt
+++ b/orx-jvm/orx-git-archiver/src/main/kotlin/NativeGit.kt
@@ -25,6 +25,18 @@ class NativeGit : GitProvider {
     override fun headReference(): String {
         return listOf("git", "rev-parse", "--short", "HEAD").runCommand(dir)!!.first.trimEnd()
     }
+
+    override fun logReferences(count: Int): List<String> {
+        val (out, err) = listOf("git", "log", "-$count", "--pretty=format:%h").runCommand(dir) ?: error("failed to get log references")
+        return out.split("\n").map { it.trim() }
+    }
+
+    override fun show(reference: String): String {
+        val (out, err) = listOf("git", "show", reference, "-U0").runCommand(dir) ?: error("failed to get diff")
+        return out
+    }
+
+
 }
 
 internal fun nativeGitInstalled(): Boolean {