From 5c622e3e46fb46cc41f9a2897e41b01aeecf9c21 Mon Sep 17 00:00:00 2001
From: Ben Brandt <benjamin.j.brandt@gmail.com>
Date: Thu, 15 Jan 2026 21:51:10 +0100
Subject: [PATCH] acp: Always pass env to builtin agents (#46946)

Closes #40327

The env vars were only getting added if a custom command was provided.
But it makes sense in either case to be able to specify your env vars,
so now these are applied regardless.

Closes #ISSUE

Release Notes:

- acp: Fix for env vars not being properly applied to built-in ACP
agents.
---
 crates/project/src/agent_server_store.rs | 32 ++++++++++++++++++++----
 1 file changed, 27 insertions(+), 5 deletions(-)

diff --git a/crates/project/src/agent_server_store.rs b/crates/project/src/agent_server_store.rs
index 9dde27b705d27b048a4b68179bc8dd30c5d1ed56..e9ff05403bde91b67904942db8cb5d5e17fa4817 100644
--- a/crates/project/src/agent_server_store.rs
+++ b/crates/project/src/agent_server_store.rs
@@ -609,6 +609,10 @@ impl AgentServerStore {
                     .gemini
                     .clone()
                     .and_then(|settings| settings.custom_command()),
+                settings_env: new_settings
+                    .gemini
+                    .as_ref()
+                    .and_then(|settings| settings.env.clone()),
                 ignore_system_version: new_settings
                     .gemini
                     .as_ref()
@@ -625,6 +629,10 @@ impl AgentServerStore {
                     .codex
                     .clone()
                     .and_then(|settings| settings.custom_command()),
+                settings_env: new_settings
+                    .codex
+                    .as_ref()
+                    .and_then(|settings| settings.env.clone()),
                 http_client: http_client.clone(),
                 no_browser: downstream_client
                     .as_ref()
@@ -641,6 +649,10 @@ impl AgentServerStore {
                     .claude
                     .clone()
                     .and_then(|settings| settings.custom_command()),
+                settings_env: new_settings
+                    .claude
+                    .as_ref()
+                    .and_then(|settings| settings.env.clone()),
             }),
         );
         self.external_agents
@@ -1347,6 +1359,7 @@ struct LocalGemini {
     node_runtime: NodeRuntime,
     project_environment: Entity<ProjectEnvironment>,
     custom_command: Option<AgentServerCommand>,
+    settings_env: Option<HashMap<String, String>>,
     ignore_system_version: bool,
 }
 
@@ -1363,6 +1376,7 @@ impl ExternalAgentServer for LocalGemini {
         let node_runtime = self.node_runtime.clone();
         let project_environment = self.project_environment.downgrade();
         let custom_command = self.custom_command.clone();
+        let settings_env = self.settings_env.clone();
         let ignore_system_version = self.ignore_system_version;
         let root_dir: Arc<Path> = root_dir
             .map(|root_dir| Path::new(root_dir))
@@ -1381,8 +1395,9 @@ impl ExternalAgentServer for LocalGemini {
                 .await
                 .unwrap_or_default();
 
+            env.extend(settings_env.unwrap_or_default());
+
             let mut command = if let Some(mut custom_command) = custom_command {
-                env.extend(custom_command.env.unwrap_or_default());
                 custom_command.env = Some(env);
                 custom_command
             } else if !ignore_system_version
@@ -1445,6 +1460,7 @@ struct LocalClaudeCode {
     node_runtime: NodeRuntime,
     project_environment: Entity<ProjectEnvironment>,
     custom_command: Option<AgentServerCommand>,
+    settings_env: Option<HashMap<String, String>>,
 }
 
 impl ExternalAgentServer for LocalClaudeCode {
@@ -1460,6 +1476,7 @@ impl ExternalAgentServer for LocalClaudeCode {
         let node_runtime = self.node_runtime.clone();
         let project_environment = self.project_environment.downgrade();
         let custom_command = self.custom_command.clone();
+        let settings_env = self.settings_env.clone();
         let root_dir: Arc<Path> = root_dir
             .map(|root_dir| Path::new(root_dir))
             .unwrap_or(paths::home_dir())
@@ -1478,8 +1495,9 @@ impl ExternalAgentServer for LocalClaudeCode {
                 .unwrap_or_default();
             env.insert("ANTHROPIC_API_KEY".into(), "".into());
 
+            env.extend(settings_env.unwrap_or_default());
+
             let (mut command, login_command) = if let Some(mut custom_command) = custom_command {
-                env.extend(custom_command.env.unwrap_or_default());
                 custom_command.env = Some(env);
                 (custom_command, None)
             } else {
@@ -1537,6 +1555,7 @@ struct LocalCodex {
     project_environment: Entity<ProjectEnvironment>,
     http_client: Arc<dyn HttpClient>,
     custom_command: Option<AgentServerCommand>,
+    settings_env: Option<HashMap<String, String>>,
     no_browser: bool,
 }
 
@@ -1553,6 +1572,7 @@ impl ExternalAgentServer for LocalCodex {
         let project_environment = self.project_environment.downgrade();
         let http = self.http_client.clone();
         let custom_command = self.custom_command.clone();
+        let settings_env = self.settings_env.clone();
         let root_dir: Arc<Path> = root_dir
             .map(|root_dir| Path::new(root_dir))
             .unwrap_or(paths::home_dir())
@@ -1574,8 +1594,9 @@ impl ExternalAgentServer for LocalCodex {
                 env.insert("NO_BROWSER".to_owned(), "1".to_owned());
             }
 
+            env.extend(settings_env.unwrap_or_default());
+
             let mut command = if let Some(mut custom_command) = custom_command {
-                env.extend(custom_command.env.unwrap_or_default());
                 custom_command.env = Some(env);
                 custom_command
             } else {
@@ -2030,11 +2051,12 @@ pub struct BuiltinAgentServerSettings {
 }
 
 impl BuiltinAgentServerSettings {
-    pub(crate) fn custom_command(self) -> Option<AgentServerCommand> {
+    fn custom_command(self) -> Option<AgentServerCommand> {
         self.path.map(|path| AgentServerCommand {
             path,
             args: self.args.unwrap_or_default(),
-            env: self.env,
+            // Settings env are always applied, so we don't need to supply them here as well
+            env: None,
         })
     }
 }