diff --git a/.github/workflows/publish-packagist.yml b/.github/workflows/publish-packagist.yml
index b299f7f..c632370 100644
--- a/.github/workflows/publish-packagist.yml
+++ b/.github/workflows/publish-packagist.yml
@@ -2,6 +2,9 @@ name: Publish Packagist
 on:
   workflow_dispatch:
 
+  release:
+    types: [published]
+
 jobs:
   publish:
     name: publish
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 4336a6c..85b7578 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "3.15.0"
+  ".": "3.15.1"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index 27548de..ea1fdd4 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 8
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fstagehand-5d0052068f044366d6d31570d9712922c9a80fdd6f9995af815e9afc075507ef.yml
-openapi_spec_hash: c0cb787da075d8cd2d938c05b36b5efa
-config_hash: 4252fc025e947bc0fd6b2abd91a0cc8e
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/browserbase%2Fstagehand-6fd391f729eb05dc7b6168adff89e6198bc545ebd4ff737494d72288870e0977.yml
+openapi_spec_hash: ee16862542659f47acc8dcd5669c7623
+config_hash: 7386d24e2f03a3b2a89b3f6881446348
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bed625a..946a17b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 3.15.1 (2026-02-20)
+
+Full Changelog: [v3.15.0...v3.15.1](https://github.com/browserbase/stagehand-php/compare/v3.15.0...v3.15.1)
+
+### Chores
+
+* **internal:** remove mock server code ([084d88e](https://github.com/browserbase/stagehand-php/commit/084d88e9049da3fc2acca9f2077cb37eb5dacd8a))
+* **release:** add packagist trigger on published release ([61d3be2](https://github.com/browserbase/stagehand-php/commit/61d3be273bc999a751fc060e338edd784c30136e))
+* update mock server docs ([3a5e75e](https://github.com/browserbase/stagehand-php/commit/3a5e75efcd92d87945e5f4970c5deef392e6f98a))
+
 ## 3.15.0 (2026-02-18)
 
 Full Changelog: [v3.14.0...v3.15.0](https://github.com/browserbase/stagehand-php/compare/v3.14.0...v3.15.0)
diff --git a/README.md b/README.md
index f6147b6..d62b538 100644
--- a/README.md
+++ b/README.md
@@ -80,7 +80,7 @@ The REST API documentation can be found on [docs.stagehand.dev](https://docs.sta
 <!-- x-release-please-start-version -->
 
 ```
-composer require "browserbase/stagehand 3.15.0"
+composer require "browserbase/stagehand 3.15.1"
 ```
 
 <!-- x-release-please-end -->
diff --git a/scripts/mock b/scripts/mock
deleted file mode 100755
index 0b28f6e..0000000
--- a/scripts/mock
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-cd "$(dirname "$0")/.."
-
-if [[ -n "$1" && "$1" != '--'* ]]; then
-  URL="$1"
-  shift
-else
-  URL="$(grep 'openapi_spec_url' .stats.yml | cut -d' ' -f2)"
-fi
-
-# Check if the URL is empty
-if [ -z "$URL" ]; then
-  echo "Error: No OpenAPI spec path/url provided or found in .stats.yml"
-  exit 1
-fi
-
-echo "==> Starting mock server with URL ${URL}"
-
-# Run prism mock on the given spec
-if [ "$1" == "--daemon" ]; then
-  npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock "$URL" &> .prism.log &
-
-  # Wait for server to come online
-  echo -n "Waiting for server"
-  while ! grep -q "✖  fatal\|Prism is listening" ".prism.log" ; do
-    echo -n "."
-    sleep 0.1
-  done
-
-  if grep -q "✖  fatal" ".prism.log"; then
-    cat .prism.log
-    exit 1
-  fi
-
-  echo
-else
-  npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock "$URL"
-fi
diff --git a/scripts/test b/scripts/test
index 4b777e0..63df137 100755
--- a/scripts/test
+++ b/scripts/test
@@ -4,52 +4,6 @@ set -e
 
 cd "$(dirname "$0")/.."
 
-RED='\033[0;31m'
-GREEN='\033[0;32m'
-YELLOW='\033[0;33m'
-NC='\033[0m' # No Color
 
-function prism_is_running() {
-  curl --silent "http://localhost:4010" >/dev/null 2>&1
-}
-
-kill_server_on_port() {
-  pids=$(lsof -t -i tcp:"$1" || echo "")
-  if [ "$pids" != "" ]; then
-    kill "$pids"
-    echo "Stopped $pids."
-  fi
-}
-
-function is_overriding_api_base_url() {
-  [ -n "$TEST_API_BASE_URL" ]
-}
-
-if ! is_overriding_api_base_url && ! prism_is_running ; then
-  # When we exit this script, make sure to kill the background mock server process
-  trap 'kill_server_on_port 4010' EXIT
-
-  # Start the dev server
-  ./scripts/mock --daemon
-fi
-
-if is_overriding_api_base_url ; then
-  echo -e "${GREEN}✔ Running tests against ${TEST_API_BASE_URL}${NC}"
-  echo
-elif ! prism_is_running ; then
-  echo -e "${RED}ERROR:${NC} The test suite will not run without a mock Prism server"
-  echo -e "running against your OpenAPI spec."
-  echo
-  echo -e "To run the server, pass in the path or url of your OpenAPI"
-  echo -e "spec to the prism command:"
-  echo
-  echo -e "  \$ ${YELLOW}npm exec --package=@stainless-api/prism-cli@5.15.0 -- prism mock path/to/your.openapi.yml${NC}"
-  echo
-
-  exit 1
-else
-  echo -e "${GREEN}✔ Mock prism server is running with your OpenAPI spec${NC}"
-  echo
-fi
 
 exec -- ./vendor/bin/pest --colors=always
diff --git a/src/Version.php b/src/Version.php
index e076d54..eb5d29e 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -5,5 +5,5 @@
 namespace Stagehand;
 
 // x-release-please-start-version
-const VERSION = '3.15.0';
+const VERSION = '3.15.1';
 // x-release-please-end
diff --git a/tests/Services/SessionsTest.php b/tests/Services/SessionsTest.php
index ab14125..14abf28 100644
--- a/tests/Services/SessionsTest.php
+++ b/tests/Services/SessionsTest.php
@@ -44,7 +44,7 @@ protected function setUp(): void
     public function testAct(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->act(
@@ -60,7 +60,7 @@ public function testAct(): void
     public function testActWithOptionalParams(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->act(
@@ -88,7 +88,7 @@ public function testActWithOptionalParams(): void
     public function testEnd(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->end(
@@ -103,7 +103,7 @@ public function testEnd(): void
     public function testExecute(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->execute(
@@ -122,7 +122,7 @@ public function testExecute(): void
     public function testExecuteWithOptionalParams(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->execute(
@@ -163,7 +163,7 @@ public function testExecuteWithOptionalParams(): void
     public function testExtract(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->extract(
@@ -178,7 +178,7 @@ public function testExtract(): void
     public function testNavigate(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->navigate(
@@ -194,7 +194,7 @@ public function testNavigate(): void
     public function testNavigateWithOptionalParams(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->navigate(
@@ -216,7 +216,7 @@ public function testNavigateWithOptionalParams(): void
     public function testObserve(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->observe(
@@ -231,7 +231,7 @@ public function testObserve(): void
     public function testReplay(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->replay(
@@ -246,7 +246,7 @@ public function testReplay(): void
     public function testStart(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->start(modelName: 'openai/gpt-4o');
@@ -259,7 +259,7 @@ public function testStart(): void
     public function testStartWithOptionalParams(): void
     {
         if (UnsupportedMockTests::$skip) {
-            $this->markTestSkipped('Prism tests are disabled');
+            $this->markTestSkipped('Mock server tests are disabled');
         }
 
         $result = $this->client->sessions->start(