docs: Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,3 +1,9 @@
+## Adding Features
+
+This repository uses [changesets](https://github.com/changesets/changesets) to manage package versioning. When adding a new feature, run `npx changeset add` from the root directory. This will prompt you for a short description of the change and let you interactively select which packages you've edited, and if there are major, minor or patch level changes.
+
+Commit the `.changesets` folder alongside your code when raising a pull request. The content of your changeset should be used as the body for your PR.
+
 ## Running Tests
 
 From the root directory:
@@ -6,3 +12,15 @@ From the root directory:
 pnpm build
 pnpm test
 ```
+
+## Releasing
+
+Releases are a two step process:
+
+1. Bump versions by aggregating unprocessed changesets using `npx changeset version`
+2. Commit all changes
+3. Publish packages using `npx changeset publish`
+
+GitHub Actions can perform both of these tasks. Any merge to `main` with unprocessed changesets results in a pull request with bumped versions. Any merge to main _without_ unprocessed changesets triggers `changeset publish`.
+
+@mheap tends to run `changeset version` locally, commit the bumped versions with a commit message in the format `release(package): x.y.z` and push to main to trigger a release.

README.md

@@ -1,3 +1,5 @@
 # Trello CLI
 
-This is a monorepo for everything related to Trello CLI. You're probably looking for the [trello CLI](https://github.com/mheap/trello-cli/tree/main/packages/trello-cli) README.
+This is a monorepo for everything related to Trello CLI. You're probably looking for the [trello CLI](https://github.com/mheap/trello-cli/tree/main/packages/trello-cli) README.
+
+For information on contributing, see [CONTRIBUTING.md](https://github.com/mheap/trello-cli/blob/main/CONTRIBUTING.md)