diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -87,6 +87,9 @@ stack manage --dir ~/deployments/todo-k8s stop
  - A [sign in with Ethereum](https://docs.login.xyz/) web app with fixturenet blockchain: https://github.com/bozemanpass/siwe-express-example
  - Todo List Web App with back-end: https://github.com/bozemanpass/example-todo-list
 
+For the wider set of related projects — wrapper schemes, companion stacks, test fixtures and the
+host-provisioning tools — see [docs/related-repositories.md](./docs/related-repositories.md).
+
 ## Install
 
 Stack runs on Linux, macos and Windows under WSL2. Both x86-64 and ARM64 are supported.
diff --git a/docs/README.md b/docs/README.md
index f72b9db..327fde1 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -55,3 +55,4 @@ stack authors should read [stack-files.md](stack-files.md) first.
 | --- | --- |
 | [CONTRIBUTING.md](CONTRIBUTING.md) | How to contribute: developer-mode install, coding standards, and submitting changes. |
 | [recent-features.md](recent-features.md) | Changelog of recently added features, with links to the pull requests that introduced them. |
+| [related-repositories.md](related-repositories.md) | The other repositories in the `stack` orbit — wrapper schemes, companion stacks, examples, test fixtures, and the host-provisioning tools — and each one's relationship to this project. |
diff --git a/docs/related-repositories.md b/docs/related-repositories.md
new file mode 100644
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+++ b/docs/related-repositories.md
@@ -0,0 +1,93 @@
+# Related Repositories
+
+`stack` is one piece of a larger set of repositories. Some are consumed directly by the tool
+(wrapper schemes it fetches, companion stacks it deploys), some exist only to be fetched and
+deployed by the test suite, and some are separate tools that solve the parts of the problem
+`stack` deliberately does not — creating the machine, provisioning the cluster.
+
+This page lists them and says what each one's connection to `stack` actually is. Repositories
+live in the [bozemanpass](https://github.com/bozemanpass) GitHub organization unless noted;
+the deployment-host tools live in [stirlingbridge](https://github.com/stirlingbridge).
+
+## Container wrappers
+
+Wrapper repositories provide the recipes that build an application repository with no container
+build of its own into a runnable image. `stack` fetches these two automatically when a wrapper
+is needed and none has been fetched yet — the list is hard-coded in
+`src/stack/build/wrappers.py`. See [wrappers.md](wrappers.md).
+
+| Repository | Relationship |
+| --- | --- |
+| [stack-wrapper-webapp](https://github.com/bozemanpass/stack-wrapper-webapp) | Default wrapper repo. Provides the `webapp`, `nextjs`, and `node-service` schemes and their base images for node.js applications. |
+| [stack-wrapper-static-content](https://github.com/bozemanpass/stack-wrapper-static-content) | Default wrapper repo. Provides the `static-content` scheme: a repository of static HTML served by nginx. |
+
+## Companion stacks
+
+Stacks that implement a `stack` feature but ship as their own repository, fetched and deployed
+alongside the application stack rather than built into the tool.
+
+| Repository | Relationship |
+| --- | --- |
+| [docker-ingress-stack](https://github.com/bozemanpass/docker-ingress-stack) | Implements the Docker-mode HTTPS ingress described in [ingress.md](ingress.md) — the reverse proxy that `stack`'s ingress annotations configure. |
+| [backup-stack](https://github.com/bozemanpass/backup-stack) | The container and stack components for the backup/restore design in [backup.md](backup.md). Initial scaffold; exercised by `tests/backup/run-test.sh`. |
+
+## Examples and demos
+
+Real applications that are packaged as stacks. These double as the worked examples in the
+README and as fixtures for the deployment tests.
+
+| Repository | Relationship |
+| --- | --- |
+| [example-todo-list](https://github.com/bozemanpass/example-todo-list) | The canonical example: React frontend, Node backend, PostgreSQL. Used in the README quickstart and by the Docker and Kubernetes deploy tests. |
+| [siwe-express-example](https://github.com/bozemanpass/siwe-express-example) | Sign-in-with-Ethereum Express app with a fixturenet blockchain — a stack with substantial pre-start setup. |
+| [example-stateful-container](https://github.com/bozemanpass/example-stateful-container) | Shows a container using a bind mount that retains host `uid:gid` ownership. |
+
+## Test fixtures
+
+Repositories that exist so the test suite has something real to fetch, build, and deploy. They
+are not intended for use outside testing.
+
+| Repository | Relationship |
+| --- | --- |
+| [stack-test-stacks](https://github.com/bozemanpass/stack-test-stacks) | The stack definitions used by the smoke, database, backup, and static-content tests, plus the container definitions they build (`stack-files/containers/`). The main external-stack fixture. |
+| [stack-test-static-content](https://github.com/bozemanpass/stack-test-static-content) | A repository of nothing but static HTML — the input to the `static-content` wrapper in `tests/static-content-test`. |
+| [test-progressive-web-app](https://github.com/bozemanpass/test-progressive-web-app) | A Next.js PWA, built by `tests/webapp-test` to exercise the webapp build path. Mirror of the upstream cerc-io repo. |
+| [stack-test-project](https://github.com/bozemanpass/stack-test-project) | A minimal project repository for testing project-related tooling. |
+
+## Deployment host tooling
+
+`stack` deploys *to* a Docker host or a Kubernetes cluster; it does not create one. These tools
+do that, and are what the docs and the k3s test reach for when a real host is needed. They are
+independent projects — `stack` does not depend on them at runtime.
+
+| Repository | Relationship |
+| --- | --- |
+| [stirlingbridge/machine](https://github.com/stirlingbridge/machine) | Creates and manages cloud VMs (DigitalOcean, Vultr, GCP). Used by `demo/k8s-host.sh` and `tests/k3s-deploy` to stand up a deployment host; recommended in [from-laptop-to-production.md](from-laptop-to-production.md). |
+| [stirlingbridge/machine-provisioning](https://github.com/stirlingbridge/machine-provisioning) | `cloud-init` scripts that turn a fresh VM into a Docker host or single-node k3s cluster. Its `k3s-node.sh` establishes the cluster contract that [gateway-api.md](gateway-api.md) and `deploy/k8s/gateway.py` assume. |
+
+## Agent skills
+
+| Repository | Relationship |
+| --- | --- |
+| [no-paas](https://github.com/bozemanpass/no-paas) | A Claude Code plugin marketplace cataloguing the agent skills for deploying without a PaaS. `stack`'s own skill is mastered in this repo under `skills/`; `no-paas` points at it, at the `machine` and `machine-provisioning` skills, and adds the cross-tool toolchain journeys. |
+
+## Referenced in the docs
+
+Not part of the toolchain, but named in the documentation as concrete examples, so worth
+knowing about when a doc example does not seem to come from anywhere.
+
+| Repository | Relationship |
+| --- | --- |
+| [gitea-containers](https://github.com/bozemanpass/gitea-containers) | The multi-container repository whose `act-runner` container is used throughout [stack-files.md](stack-files.md) to explain `ref`, `path`, and `content-root`. |
+
+## Dormant
+
+Older stacks kept for reference; not exercised by any current test or doc.
+
+[gitea-stack](https://github.com/bozemanpass/gitea-stack),
+[fixturenet-eth-stack](https://github.com/bozemanpass/fixturenet-eth-stack),
+[blockscout-stack](https://github.com/bozemanpass/blockscout-stack),
+[din-caddy-stack](https://github.com/bozemanpass/din-caddy-stack),
+[go-nitro-stack](https://github.com/bozemanpass/go-nitro-stack),
+[tensor-demo-stack](https://github.com/bozemanpass/tensor-demo-stack),
+[stack-test-laconicd](https://github.com/bozemanpass/stack-test-laconicd).