From 4427817ff6d3bf224dbd3b16070ce79a0b13e5fb Mon Sep 17 00:00:00 2001
From: Eric Allam <eallam@icloud.com>
Date: Wed, 13 Aug 2025 14:21:53 +0100
Subject: [PATCH] fix: legacyDevProcessCwdBehaviour defaults to true

This fixes an issue with prisma not being able to locate the native
add-on binary
---
 .changeset/afraid-waves-divide.md        |  5 +++++
 packages/cli-v3/src/dev/devSupervisor.ts | 10 ++++++----
 packages/core/src/v3/config.ts           |  4 ++--
 3 files changed, 13 insertions(+), 6 deletions(-)
 create mode 100644 .changeset/afraid-waves-divide.md

diff --git a/.changeset/afraid-waves-divide.md b/.changeset/afraid-waves-divide.md
new file mode 100644
index 0000000000..3ab19fb2df
--- /dev/null
+++ b/.changeset/afraid-waves-divide.md
@@ -0,0 +1,5 @@
+---
+"trigger.dev": patch
+---
+
+Make the default of legacyDevProcessCwdBehaviour true instead of false (prevents breaking prismaExtension)
diff --git a/packages/cli-v3/src/dev/devSupervisor.ts b/packages/cli-v3/src/dev/devSupervisor.ts
index a445748473..fdbc3795fb 100644
--- a/packages/cli-v3/src/dev/devSupervisor.ts
+++ b/packages/cli-v3/src/dev/devSupervisor.ts
@@ -358,10 +358,12 @@ class DevSupervisor implements WorkerRuntime {
           config: this.options.config,
         });
 
-        const cwd =
-          this.options.config.legacyDevProcessCwdBehaviour === true
-            ? undefined
-            : worker.build.outputPath;
+        const legacyDevProcessCwdBehaviour =
+          typeof this.options.config.legacyDevProcessCwdBehaviour === "boolean"
+            ? this.options.config.legacyDevProcessCwdBehaviour
+            : true;
+
+        const cwd = legacyDevProcessCwdBehaviour === true ? undefined : worker.build.outputPath;
 
         //new run
         runController = new DevRunController({
diff --git a/packages/core/src/v3/config.ts b/packages/core/src/v3/config.ts
index 08d1e90359..b5caba64b9 100644
--- a/packages/core/src/v3/config.ts
+++ b/packages/core/src/v3/config.ts
@@ -280,10 +280,10 @@ export type TriggerConfig = {
   processKeepAlive?: ProcessKeepAlive;
 
   /**
-   * @default false
+   * @default true
    * @description If set to true when running the dev CLI, the current working directory will be set to where the command is run from.
    *
-   * The new default (when this flag isn't passed) is to set the current working directory to the build directory.
+   * Setting this to `false` will set the current working directory to the build directory.
    * This more closely matches the behavior of the CLI when running in production and is highly recommended.
    *
    * This impacts the value of process.cwd() in your task code.