diff --git a/.github/workflows/Documentation.yml b/.github/workflows/Documentation.yml
new file mode 100644
index 0000000..b32eb49
--- /dev/null
+++ b/.github/workflows/Documentation.yml
@@ -0,0 +1,27 @@
+name: Documentation
+
+on:
+  push:
+    branches:
+      - main
+    tags: '*'
+  pull_request:
+
+# The reusable documentation workflow requests these permissions for its
+# build job; declare them here so the call starts even when the repo's
+# default GITHUB_TOKEN permissions are read-only.
+permissions:
+  actions: write
+  contents: write
+  pull-requests: write
+  statuses: write
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  build-and-deploy-docs:
+    name: "Documentation"
+    uses: "SciML/.github/.github/workflows/documentation.yml@v1"
+    secrets: "inherit"
diff --git a/docs/Project.toml b/docs/Project.toml
new file mode 100644
index 0000000..e88887d
--- /dev/null
+++ b/docs/Project.toml
@@ -0,0 +1,8 @@
+[deps]
+Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+SciMLTesting = "09d9d899-5365-40a9-917a-5f67fddea283"
+
+[compat]
+Documenter = "1"
+SciMLTesting = "2"
+julia = "1.10"
diff --git a/docs/make.jl b/docs/make.jl
new file mode 100644
index 0000000..c629544
--- /dev/null
+++ b/docs/make.jl
@@ -0,0 +1,20 @@
+using Documenter
+using SciMLTesting
+
+makedocs(;
+    modules = [SciMLTesting],
+    authors = "SciML Contributors",
+    sitename = "SciMLTesting.jl",
+    format = Documenter.HTML(;
+        prettyurls = get(ENV, "CI", "false") == "true",
+        canonical = "https://docs.sciml.ai/SciMLTesting/stable/",
+    ),
+    pages = [
+        "Home" => "index.md",
+        "API" => "api.md",
+    ],
+)
+
+deploydocs(;
+    repo = "github.com/SciML/SciMLTesting.jl.git",
+)
diff --git a/docs/src/api.md b/docs/src/api.md
index 8f518ff..7655519 100644
--- a/docs/src/api.md
+++ b/docs/src/api.md
@@ -1,5 +1,29 @@
 # API Reference
 
-```@autodocs
-Modules = [SciMLTesting]
+## Test dispatch
+
+```@docs
+read_test_groups
+current_group
+detect_sublibrary_group
+run_tests
+run_everything
+```
+
+## Test environments
+
+```@docs
+activate_group_env
+develop_sources!
+with_clean_persistent_tasks_sources
+```
+
+## Quality assurance
+
+```@docs
+run_qa
+run_explicit_imports
+run_api_docs
+public_api_names
+public_reexports
 ```
diff --git a/docs/src/index.md b/docs/src/index.md
new file mode 100644
index 0000000..dde6628
--- /dev/null
+++ b/docs/src/index.md
@@ -0,0 +1,28 @@
+# SciMLTesting.jl
+
+```@docs
+SciMLTesting
+```
+
+## Usage
+
+A package's `test/runtests.jl` replaces its hand-written `GROUP` ladder with a
+single call to [`run_tests`](@ref):
+
+```julia
+using SciMLTesting
+
+run_tests()
+```
+
+The groups a package supports are declared in `test/test_groups.toml`. A group
+that has its own environment can be selected by name through the `GROUP`
+environment variable, which is what CI lanes use:
+
+```sh
+GROUP=Core julia --project -e 'using Pkg; Pkg.test()'
+```
+
+## API
+
+See the [API Reference](@ref) for the full list of exported helpers.