From 38dc6ebdf4df4aea60b0a0b8c28ad998c0670cfe Mon Sep 17 00:00:00 2001
From: Brace Sproul <braceasproul@gmail.com>
Date: Wed, 18 Jun 2025 11:58:15 -0700
Subject: [PATCH] fix: Improve DX for getting port for agent (#221)

* fix: Improve DX for getting port for agent

* docs
---
 README.md                                   | 4 ++++
 apps/open-swe/.env.example                  | 6 +++++-
 apps/open-swe/src/utils/langgraph-client.ts | 6 ++----
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 42dc7701..e18491e0 100644
--- a/README.md
+++ b/README.md
@@ -52,6 +52,10 @@ DAYTONA_API_KEY=""
 GITHUB_TOKEN_ENCRYPTION_KEY=""
 # Used for setting the git user name & email for commits.
 GITHUB_APP_NAME="open-swe-dev"
+
+# Defaults to 2024 if not set.
+# LGP will automatically set this for you in production.
+# PORT="2024"
 ```
 
 And the web `.env` file should contain the following variables:
diff --git a/apps/open-swe/.env.example b/apps/open-swe/.env.example
index b818e3c9..59a99c61 100644
--- a/apps/open-swe/.env.example
+++ b/apps/open-swe/.env.example
@@ -16,4 +16,8 @@ DAYTONA_API_KEY=""
 # Should be the same value as the one used in the web app.
 GITHUB_TOKEN_ENCRYPTION_KEY=""
 # Used for setting the git user name & email for commits.
-GITHUB_APP_NAME="open-swe-dev"
\ No newline at end of file
+GITHUB_APP_NAME="open-swe-dev"
+
+# Defaults to 2024 if not set.
+# LGP will automatically set this for you in production.
+# PORT="2024"
diff --git a/apps/open-swe/src/utils/langgraph-client.ts b/apps/open-swe/src/utils/langgraph-client.ts
index 0592a1df..4c91a377 100644
--- a/apps/open-swe/src/utils/langgraph-client.ts
+++ b/apps/open-swe/src/utils/langgraph-client.ts
@@ -4,9 +4,7 @@ export function createLangGraphClient(options?: {
   defaultHeaders?: Record<string, string>;
   includeApiKey?: boolean;
 }) {
-  if (!process.env.PORT) {
-    throw new Error("PORT environment variable not found");
-  }
+  const port = process.env.PORT ?? "2024";
   if (options?.includeApiKey && !process.env.LANGGRAPH_API_KEY) {
     throw new Error("LANGGRAPH_API_KEY not found");
   }
@@ -14,7 +12,7 @@ export function createLangGraphClient(options?: {
     ...(options?.includeApiKey && {
       apiKey: process.env.LANGGRAPH_API_KEY,
     }),
-    apiUrl: `http://localhost:${process.env.PORT}`,
+    apiUrl: `http://localhost:${port}`,
     defaultHeaders: options?.defaultHeaders,
   });
 }