diff --git a/.changeset/patch-group-github-output-redirects.md b/.changeset/patch-group-github-output-redirects.md
new file mode 100644
index 00000000000..21cc4b0d739
--- /dev/null
+++ b/.changeset/patch-group-github-output-redirects.md
@@ -0,0 +1,5 @@
+---
+"gh-aw": patch
+---
+
+Group the consecutive `$GITHUB_OUTPUT` redirects in the MCP setup scripts and their tests to satisfy SC2129 shellcheck and keep output handling consistent.
diff --git a/actions/setup/js/mcp_server_core.test.cjs b/actions/setup/js/mcp_server_core.test.cjs
index 0fe25fc0ffd..fd8ca154458 100644
--- a/actions/setup/js/mcp_server_core.test.cjs
+++ b/actions/setup/js/mcp_server_core.test.cjs
@@ -781,9 +781,11 @@ echo "result=success" >> $GITHUB_OUTPUT
       fs.writeFileSync(
         handlerPath,
         `#!/bin/bash
-echo "first=value1" >> $GITHUB_OUTPUT
-echo "second=value2" >> $GITHUB_OUTPUT
-echo "third=value with spaces" >> $GITHUB_OUTPUT
+{
+  echo "first=value1"
+  echo "second=value2"
+  echo "third=value with spaces"
+} >> $GITHUB_OUTPUT
 `,
         { mode: 0o755 }
       );
diff --git a/actions/setup/sh/start_mcp_gateway.sh b/actions/setup/sh/start_mcp_gateway.sh
index 52513ab2edc..accd64aa221 100755
--- a/actions/setup/sh/start_mcp_gateway.sh
+++ b/actions/setup/sh/start_mcp_gateway.sh
@@ -422,7 +422,9 @@ print_timing $SCRIPT_START_TIME "Overall gateway startup"
 echo ""
 
 # Output PID as GitHub Actions step output for use in cleanup
-echo "gateway-pid=$GATEWAY_PID" >> $GITHUB_OUTPUT
 # Output port and API key for use in stop script (per MCP Gateway Specification v1.1.0)
-echo "gateway-port=${MCP_GATEWAY_PORT}" >> $GITHUB_OUTPUT
-echo "gateway-api-key=${MCP_GATEWAY_API_KEY}" >> $GITHUB_OUTPUT
+{
+  echo "gateway-pid=$GATEWAY_PID"
+  echo "gateway-port=${MCP_GATEWAY_PORT}"
+  echo "gateway-api-key=${MCP_GATEWAY_API_KEY}"
+} >> $GITHUB_OUTPUT
diff --git a/actions/setup/sh/start_safe_inputs_server.sh b/actions/setup/sh/start_safe_inputs_server.sh
index 1787104cd25..ecc1667dbe6 100755
--- a/actions/setup/sh/start_safe_inputs_server.sh
+++ b/actions/setup/sh/start_safe_inputs_server.sh
@@ -126,5 +126,7 @@ for i in {1..10}; do
 done
 
 # Output the configuration for the MCP client
-echo "port=$GH_AW_SAFE_INPUTS_PORT" >> "$GITHUB_OUTPUT"
-echo "api_key=$GH_AW_SAFE_INPUTS_API_KEY" >> "$GITHUB_OUTPUT"
+{
+  echo "port=$GH_AW_SAFE_INPUTS_PORT"
+  echo "api_key=$GH_AW_SAFE_INPUTS_API_KEY"
+} >> "$GITHUB_OUTPUT"
diff --git a/actions/setup/sh/start_safe_outputs_server.sh b/actions/setup/sh/start_safe_outputs_server.sh
index 50195cff75e..a7449058e05 100755
--- a/actions/setup/sh/start_safe_outputs_server.sh
+++ b/actions/setup/sh/start_safe_outputs_server.sh
@@ -126,5 +126,7 @@ for i in {1..60}; do
 done
 
 # Output the configuration for the MCP client
-echo "port=$GH_AW_SAFE_OUTPUTS_PORT" >> "$GITHUB_OUTPUT"
-echo "api_key=$GH_AW_SAFE_OUTPUTS_API_KEY" >> "$GITHUB_OUTPUT"
+{
+  echo "port=$GH_AW_SAFE_OUTPUTS_PORT"
+  echo "api_key=$GH_AW_SAFE_OUTPUTS_API_KEY"
+} >> "$GITHUB_OUTPUT"