diff --git a/src/AcDream.Plugin.Abstractions/IAcDreamPlugin.cs b/src/AcDream.Plugin.Abstractions/IAcDreamPlugin.cs
new file mode 100644
index 0000000..ba59c63
--- /dev/null
+++ b/src/AcDream.Plugin.Abstractions/IAcDreamPlugin.cs
@@ -0,0 +1,9 @@
+// src/AcDream.Plugin.Abstractions/IAcDreamPlugin.cs
+namespace AcDream.Plugin.Abstractions;
+
+public interface IAcDreamPlugin
+{
+    void Initialize(IPluginHost host);
+    void Enable();
+    void Disable();
+}
diff --git a/src/AcDream.Plugin.Abstractions/ILogger.cs b/src/AcDream.Plugin.Abstractions/ILogger.cs
new file mode 100644
index 0000000..a7199cf
--- /dev/null
+++ b/src/AcDream.Plugin.Abstractions/ILogger.cs
@@ -0,0 +1,9 @@
+// src/AcDream.Plugin.Abstractions/ILogger.cs
+namespace AcDream.Plugin.Abstractions;
+
+public interface ILogger
+{
+    void Info(string message);
+    void Warn(string message);
+    void Error(string message, Exception? exception = null);
+}
diff --git a/src/AcDream.Plugin.Abstractions/IPluginHost.cs b/src/AcDream.Plugin.Abstractions/IPluginHost.cs
new file mode 100644
index 0000000..065a533
--- /dev/null
+++ b/src/AcDream.Plugin.Abstractions/IPluginHost.cs
@@ -0,0 +1,11 @@
+// src/AcDream.Plugin.Abstractions/IPluginHost.cs
+namespace AcDream.Plugin.Abstractions;
+
+/// <summary>
+/// Entry point for a plugin into the acdream runtime. The surface will grow
+/// across phases as more systems come online. For Phase 1 only ILogger is real.
+/// </summary>
+public interface IPluginHost
+{
+    ILogger Log { get; }
+}
diff --git a/src/AcDream.Plugin.Abstractions/Placeholder.cs b/src/AcDream.Plugin.Abstractions/Placeholder.cs
deleted file mode 100644
index 1cbfb0f..0000000
--- a/src/AcDream.Plugin.Abstractions/Placeholder.cs
+++ /dev/null
@@ -1,3 +0,0 @@
-// src/AcDream.Plugin.Abstractions/Placeholder.cs
-namespace AcDream.Plugin.Abstractions;
-internal static class Placeholder { }