diff --git a/Cargo.lock b/Cargo.lock
index f76ff73..eab3cc5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1690,7 +1690,7 @@ checksum = "9e1c906769ad99c88eaa54e728060edef082f8e358ff32030cb7c7d315e81109"
 
 [[package]]
 name = "tree-ring-memory-cli"
-version = "0.15.3"
+version = "0.15.4"
 dependencies = [
  "chrono",
  "clap",
@@ -1709,7 +1709,7 @@ dependencies = [
 
 [[package]]
 name = "tree-ring-memory-core"
-version = "0.15.3"
+version = "0.15.4"
 dependencies = [
  "chrono",
  "libc",
@@ -1725,7 +1725,7 @@ dependencies = [
 
 [[package]]
 name = "tree-ring-memory-sqlite"
-version = "0.15.3"
+version = "0.15.4"
 dependencies = [
  "rusqlite",
  "serde",
diff --git a/Cargo.toml b/Cargo.toml
index 8de24e2..a7a45ec 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ members = [
 resolver = "2"
 
 [workspace.package]
-version = "0.15.3"
+version = "0.15.4"
 edition = "2021"
 license = "MIT"
 authors = ["TerminallyLazy"]
diff --git a/crates/tree-ring-memory-cli/Cargo.toml b/crates/tree-ring-memory-cli/Cargo.toml
index aaef226..ad2df87 100644
--- a/crates/tree-ring-memory-cli/Cargo.toml
+++ b/crates/tree-ring-memory-cli/Cargo.toml
@@ -26,8 +26,8 @@ semver.workspace = true
 sha2.workspace = true
 tempfile.workspace = true
 uuid.workspace = true
-tree-ring-memory-core = { path = "../tree-ring-memory-core", version = "0.15.3" }
-tree-ring-memory-sqlite = { path = "../tree-ring-memory-sqlite", version = "0.15.3" }
+tree-ring-memory-core = { path = "../tree-ring-memory-core", version = "0.15.4" }
+tree-ring-memory-sqlite = { path = "../tree-ring-memory-sqlite", version = "0.15.4" }
 
 [dev-dependencies]
 rusqlite.workspace = true
diff --git a/crates/tree-ring-memory-cli/src/activation/adapters.rs b/crates/tree-ring-memory-cli/src/activation/adapters.rs
index 0687a6d..fd28f7f 100644
--- a/crates/tree-ring-memory-cli/src/activation/adapters.rs
+++ b/crates/tree-ring-memory-cli/src/activation/adapters.rs
@@ -15,8 +15,12 @@ pub const AGENT_ZERO_PLUGIN_MANIFEST_ENV: &str = "TREE_RING_AGENT_ZERO_PLUGIN_MA
 
 const AGENT_ZERO_CAPABILITY_FILE: &str = "activation-capability.json";
 const AGENT_ZERO_CAPABILITY_KIND: &str = "tree-ring-agent-zero-plugin-capability";
-const AGENT_ZERO_CAPABILITY_CONTRACTS: &[(&str, &str, &str)] =
-    &[("3.1.0", "0.14.0", "0.14"), ("3.2.0", "0.15.3", "0.15")];
+const AGENT_ZERO_CAPABILITY_CONTRACTS: &[(&str, &str, &str)] = &[
+    ("3.1.0", "0.14.0", "0.14"),
+    ("3.2.0", "0.15.3", "0.15"),
+    ("3.3.0", "0.15.3", "0.15"),
+    ("3.3.1", "0.15.3", "0.15"),
+];
 const MAX_AGENT_ZERO_CAPABILITY_BYTES: u64 = 16 * 1024;
 
 /// Project paths used by activation. Adapter plans always target this root.
@@ -1113,6 +1117,24 @@ mod tests {
             Some(AgentZeroPluginManifest::compatible())
         );
 
+        fs::write(
+            plugin.join("plugin.yaml"),
+            "name: tree_ring_memory\nversion: 3.3.1\n",
+        )
+        .unwrap();
+        fs::write(
+            &descriptor,
+            capability_document(true).replace(
+                "\"plugin_version\":\"3.2.0\"",
+                "\"plugin_version\":\"3.3.1\"",
+            ),
+        )
+        .unwrap();
+        assert_eq!(
+            read_agent_zero_plugin_manifest(&project, &descriptor),
+            Some(AgentZeroPluginManifest::compatible())
+        );
+
         fs::write(
             plugin.join("plugin.yaml"),
             "name: tree_ring_memory\nversion: 3.1.0\n",
diff --git a/crates/tree-ring-memory-cli/tests/harness_activation_acceptance.rs b/crates/tree-ring-memory-cli/tests/harness_activation_acceptance.rs
index 0a8606e..1154bc1 100644
--- a/crates/tree-ring-memory-cli/tests/harness_activation_acceptance.rs
+++ b/crates/tree-ring-memory-cli/tests/harness_activation_acceptance.rs
@@ -918,13 +918,13 @@ fn install_agent_zero_plugin(base: &Path) -> PathBuf {
     fs::create_dir_all(&plugin).unwrap();
     fs::write(
         plugin.join("plugin.yaml"),
-        "name: tree_ring_memory\nversion: 3.2.0\n",
+        "name: tree_ring_memory\nversion: 3.3.1\n",
     )
     .unwrap();
     let descriptor = plugin.join("activation-capability.json");
     fs::write(
         &descriptor,
-        r#"{"schema_version":1,"kind":"tree-ring-agent-zero-plugin-capability","plugin_id":"tree_ring_memory","plugin_version":"3.2.0","activation_protocol_version":1,"tree_ring_version":{"min":"0.15.3","minor":"0.15"},"enabled":true}"#,
+        r#"{"schema_version":1,"kind":"tree-ring-agent-zero-plugin-capability","plugin_id":"tree_ring_memory","plugin_version":"3.3.1","activation_protocol_version":1,"tree_ring_version":{"min":"0.15.3","minor":"0.15"},"enabled":true}"#,
     )
     .unwrap();
     descriptor