diff --git a/config.yaml b/config.yaml
index ab4cb09c..79bdaacc 100644
--- a/config.yaml
+++ b/config.yaml
@@ -492,6 +492,20 @@ uenvs:
         daint: [gh200]
         santis: [gh200]
         clariden: [gh200]
+  srt:
+    "26.4":
+      recipes:
+        zen2: "26.4"
+        zen3: "26.4"
+        gh200: "26.4"
+        a100: "26.4"
+      deploy:
+        daint: [gh200]
+        santis: [gh200]
+        clariden: [gh200]
+        eiger: [zen2]
+        bristen: [a100]
+      mount: "/user-tools"
   vasp:
     "v6.4.2":
       recipes:
diff --git a/recipes/srt/26.4/compilers.yaml b/recipes/srt/26.4/compilers.yaml
new file mode 100644
index 00000000..65120c9f
--- /dev/null
+++ b/recipes/srt/26.4/compilers.yaml
@@ -0,0 +1,2 @@
+gcc:
+  version: "14"
diff --git a/recipes/srt/26.4/config.yaml b/recipes/srt/26.4/config.yaml
new file mode 100644
index 00000000..0a34ffaa
--- /dev/null
+++ b/recipes/srt/26.4/config.yaml
@@ -0,0 +1,10 @@
+name: srt
+spack:
+  repo: https://github.com/spack/spack.git
+  commit: releases/v1.1
+  packages:
+    repo: https://github.com/spack/spack-packages.git
+    commit: 1a32c3379c9fa28549c68b7931712d81831304df # 2025-12-16
+store: /user-tools
+description: Anthropic Sandbox Runtime (srt) and its Linux runtime dependencies (bubblewrap, socat, ripgrep, node-js)
+version: 2
diff --git a/recipes/srt/26.4/environments.yaml b/recipes/srt/26.4/environments.yaml
new file mode 100644
index 00000000..9c87fa9f
--- /dev/null
+++ b/recipes/srt/26.4/environments.yaml
@@ -0,0 +1,17 @@
+srt:
+  compiler: [gcc]
+  unify: true
+  specs:
+  - python@3.12 # Node.js uses gyp for its build system, which is notoriously sensitive to Python versions. 
+  - node-js
+  - npm            # Add this as a standalone spec as it is not automatically included with node-js
+  - bubblewrap
+  - socat
+  - ripgrep
+  views:
+    srt:
+      link: roots
+      uenv:
+        prefix_paths:
+          PATH: [bin]
+          LD_LIBRARY_PATH: [lib, lib64]
diff --git a/recipes/srt/26.4/modules.yaml b/recipes/srt/26.4/modules.yaml
new file mode 100644
index 00000000..8fc2550e
--- /dev/null
+++ b/recipes/srt/26.4/modules.yaml
@@ -0,0 +1,20 @@
+modules:
+  # Paths to check when creating modules for all module sets
+  prefix_inspections:
+    bin:
+      - PATH
+    lib:
+      - LD_LIBRARY_PATH
+    lib64:
+      - LD_LIBRARY_PATH
+
+  default:
+    arch_folder: false
+    tcl:
+      all:
+        autoload: none
+      hash_length: 0
+      exclude_implicits: true
+      exclude: []
+      projections:
+        all: '{name}/{version}'
diff --git a/recipes/srt/26.4/post-install b/recipes/srt/26.4/post-install
new file mode 100755
index 00000000..2f7b33dd
--- /dev/null
+++ b/recipes/srt/26.4/post-install
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Description: Install @anthropic-ai/sandbox-runtime via npm into the srt spack view directory, so the srt binary is co-located with node/npm/ripgrep.
+
+# UENV specific environment variables
+export ENV_MOUNT={{ env.mount }}    # export ENV_MOUNT=/user-environment
+
+# Find the node-js and npm prefixes installed by Spack
+NODE_HOME=$(spack -C $ENV_MOUNT/config location -i node-js)
+NPM_HOME=$(spack -C $ENV_MOUNT/config location -i npm)
+
+# Add node and npm to the active PATH for this execution context
+export PATH="${NODE_HOME}/bin:${NPM_HOME}/bin:${PATH}"
+
+# Install @anthropic-ai/sandbox-runtime globally with --prefix set to the srt spack view directory ($ENV_MOUNT/env/srt).
+# This places the srt binary at $ENV_MOUNT/env/srt/bin/srt, alongside the spack-linked node, npm, ripgrep, bwrap and socat binaries in that view's bin/.
+npm install --global --prefix $ENV_MOUNT/env/srt @anthropic-ai/sandbox-runtime
+