diff --git a/Cargo.lock b/Cargo.lock
index 7ba4f1f6e1..0a5a1a01fe 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -264,16 +264,18 @@ dependencies = [
 
 [[package]]
 name = "agentic-coding-protocol"
-version = "0.0.7"
+version = "0.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a75f520bcc049ebe40c8c99427aa61b48ad78a01bcc96a13b350b903dcfb9438"
+checksum = "0e276b798eddd02562a339340a96919d90bbfcf78de118fdddc932524646fac7"
 dependencies = [
  "anyhow",
  "chrono",
+ "derive_more 2.0.1",
  "futures 0.3.31",
  "log",
  "parking_lot",
  "schemars",
+ "semver",
  "serde",
  "serde_json",
 ]
@@ -676,7 +678,7 @@ dependencies = [
  "anyhow",
  "async-trait",
  "collections",
- "derive_more",
+ "derive_more 0.99.19",
  "extension",
  "futures 0.3.31",
  "gpui",
@@ -739,7 +741,7 @@ dependencies = [
  "clock",
  "collections",
  "ctor",
- "derive_more",
+ "derive_more 0.99.19",
  "futures 0.3.31",
  "gpui",
  "icons",
@@ -775,7 +777,7 @@ dependencies = [
  "clock",
  "collections",
  "component",
- "derive_more",
+ "derive_more 0.99.19",
  "editor",
  "feature_flags",
  "fs",
@@ -1232,7 +1234,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "collections",
- "derive_more",
+ "derive_more 0.99.19",
  "gpui",
  "parking_lot",
  "rodio",
@@ -2925,7 +2927,7 @@ dependencies = [
  "cocoa 0.26.0",
  "collections",
  "credentials_provider",
- "derive_more",
+ "derive_more 0.99.19",
  "feature_flags",
  "fs",
  "futures 0.3.31",
@@ -3113,7 +3115,7 @@ dependencies = [
  "dap_adapters",
  "dashmap 6.1.0",
  "debugger_ui",
- "derive_more",
+ "derive_more 0.99.19",
  "editor",
  "envy",
  "extension",
@@ -3318,7 +3320,7 @@ name = "command_palette_hooks"
 version = "0.1.0"
 dependencies = [
  "collections",
- "derive_more",
+ "derive_more 0.99.19",
  "gpui",
  "workspace-hack",
 ]
@@ -4525,6 +4527,27 @@ dependencies = [
  "syn 2.0.101",
 ]
 
+[[package]]
+name = "derive_more"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "093242cf7570c207c83073cf82f79706fe7b8317e98620a47d5be7c3d8497678"
+dependencies = [
+ "derive_more-impl",
+]
+
+[[package]]
+name = "derive_more-impl"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bda628edc44c4bb645fbe0f758797143e4e07926f7ebf4e9bdfbd3d2ce621df3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.101",
+ "unicode-xid",
+]
+
 [[package]]
 name = "derive_refineable"
 version = "0.1.0"
@@ -6223,7 +6246,7 @@ dependencies = [
  "askpass",
  "async-trait",
  "collections",
- "derive_more",
+ "derive_more 0.99.19",
  "futures 0.3.31",
  "git2",
  "gpui",
@@ -7240,7 +7263,7 @@ dependencies = [
  "core-video",
  "cosmic-text",
  "ctor",
- "derive_more",
+ "derive_more 0.99.19",
  "embed-resource",
  "env_logger 0.11.8",
  "etagere",
@@ -7786,7 +7809,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "bytes 1.10.1",
- "derive_more",
+ "derive_more 0.99.19",
  "futures 0.3.31",
  "http 1.3.1",
  "log",
@@ -8224,7 +8247,7 @@ dependencies = [
  "async-trait",
  "cargo_metadata",
  "collections",
- "derive_more",
+ "derive_more 0.99.19",
  "extension",
  "fs",
  "futures 0.3.31",
@@ -14163,6 +14186,7 @@ dependencies = [
  "indexmap",
  "ref-cast",
  "schemars_derive",
+ "semver",
  "serde",
  "serde_json",
 ]
@@ -16124,7 +16148,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "collections",
- "derive_more",
+ "derive_more 0.99.19",
  "fs",
  "futures 0.3.31",
  "gpui",
diff --git a/Cargo.toml b/Cargo.toml
index f96240531f..5403f279c8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -404,7 +404,7 @@ zlog_settings = { path = "crates/zlog_settings" }
 # External crates
 #
 
-agentic-coding-protocol = "0.0.7"
+agentic-coding-protocol = { version = "0.0.9" }
 aho-corasick = "1.1"
 alacritty_terminal = { git = "https://github.com/zed-industries/alacritty.git", branch = "add-hush-login-flag" }
 any_vec = "0.14"
diff --git a/crates/acp/src/acp.rs b/crates/acp/src/acp.rs
index f89eab2032..8351aeaee0 100644
--- a/crates/acp/src/acp.rs
+++ b/crates/acp/src/acp.rs
@@ -875,7 +875,7 @@ impl AcpThread {
         &self,
     ) -> impl use<> + Future<Output = Result<acp::InitializeResponse, acp::Error>> {
         let connection = self.connection.clone();
-        async move { connection.request(acp::InitializeParams).await }
+        async move { connection.initialize().await }
     }
 
     pub fn authenticate(&self) -> impl use<> + Future<Output = Result<(), acp::Error>> {
@@ -1839,8 +1839,12 @@ mod tests {
     }
 
     impl acp::Agent for FakeAgent {
-        async fn initialize(&self) -> Result<acp::InitializeResponse, acp::Error> {
+        async fn initialize(
+            &self,
+            params: acp::InitializeParams,
+        ) -> Result<acp::InitializeResponse, acp::Error> {
             Ok(acp::InitializeResponse {
+                protocol_version: params.protocol_version,
                 is_authenticated: true,
             })
         }
diff --git a/tooling/workspace-hack/Cargo.toml b/tooling/workspace-hack/Cargo.toml
index 59f8449284..530c2cf925 100644
--- a/tooling/workspace-hack/Cargo.toml
+++ b/tooling/workspace-hack/Cargo.toml
@@ -107,7 +107,7 @@ rustc-hash = { version = "1" }
 rustix-d585fab2519d2d1 = { package = "rustix", version = "0.38", default-features = false, features = ["fs", "net", "std"] }
 rustls = { version = "0.23", features = ["ring"] }
 rustls-webpki = { version = "0.103", default-features = false, features = ["aws-lc-rs", "ring", "std"] }
-schemars = { version = "1", features = ["chrono04", "indexmap2"] }
+schemars = { version = "1", features = ["chrono04", "indexmap2", "semver1"] }
 sea-orm = { version = "1", features = ["runtime-tokio-rustls", "sqlx-postgres", "sqlx-sqlite"] }
 sea-query-binder = { version = "0.7", default-features = false, features = ["postgres-array", "sqlx-postgres", "sqlx-sqlite", "with-bigdecimal", "with-chrono", "with-json", "with-rust_decimal", "with-time", "with-uuid"] }
 semver = { version = "1", features = ["serde"] }
@@ -240,7 +240,7 @@ rustc-hash = { version = "1" }
 rustix-d585fab2519d2d1 = { package = "rustix", version = "0.38", default-features = false, features = ["fs", "net", "std"] }
 rustls = { version = "0.23", features = ["ring"] }
 rustls-webpki = { version = "0.103", default-features = false, features = ["aws-lc-rs", "ring", "std"] }
-schemars = { version = "1", features = ["chrono04", "indexmap2"] }
+schemars = { version = "1", features = ["chrono04", "indexmap2", "semver1"] }
 sea-orm = { version = "1", features = ["runtime-tokio-rustls", "sqlx-postgres", "sqlx-sqlite"] }
 sea-query-binder = { version = "0.7", default-features = false, features = ["postgres-array", "sqlx-postgres", "sqlx-sqlite", "with-bigdecimal", "with-chrono", "with-json", "with-rust_decimal", "with-time", "with-uuid"] }
 semver = { version = "1", features = ["serde"] }