GHA: add GHA-based version bumping workflow

.github/workflows/bump.yaml

@@ -0,0 +1,19 @@
+name: Bump Version
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'New version (e.g. 0.1.0)'
+        required: true
+        type: string
+
+jobs:
+  bump:
+    uses: tidywf/.github/.github/workflows/bump.yaml@main
+    permissions:
+      contents: write
+    with:
+      pkg_name: nemo
+      pkg_version: ${{ inputs.version }}
+    secrets: inherit

CLAUDE.md

@@ -127,7 +127,17 @@ R code is formatted with [air](https://github.com/posit-dev/air) (100-char line
 
 ## Version Bumping and Release Workflow
 
-Use `make bump VERSION=x.y.z` to bump the version. This runs `bump-my-version` (configured in `.bumpversion.toml`), which updates all version references across the repo in a single commit with the message `Bump version: OLD => NEW`. The CI workflow (`deploy.yaml`) triggers on that commit message pattern to build and publish the conda package and docs.
+Bumping is done via the `.github/workflows/bump.yaml` GitHub Actions workflow, which installs the package, bumps all version references, renders `README.qmd`, and pushes a single `Bump version: OLD => NEW` commit directly to the branch (using the bot token to bypass branch protection). The `deploy.yaml` workflow triggers on that commit message pattern.
+
+Trigger it from the CLI:
+
+```bash
+make bump VERSION=x.y.z BRANCH=dev
+# or on main:
+make bump VERSION=x.y.z BRANCH=main
+```
+
+This calls `gh workflow run bump.yaml --ref BRANCH --field version=VERSION` under the hood. Can also be triggered via the GitHub Actions UI: Actions → Bump Version → Run workflow.
 
 ## CI/CD: `.github/workflows/deploy.yaml`
 

Makefile

@@ -21,9 +21,9 @@ build-readme: build readme
 
 bump:
 ifndef VERSION
-	$(error VERSION is not set. Usage: make bump VERSION=x.y.z)
+	$(error VERSION is not set. Usage: make bump VERSION=x.y.z BRANCH=dev)
 endif
-	@bump-my-version bump --new-version $(VERSION)
-	@$(MAKE) --no-print-directory build-readme
-	@git add README.md
-	@git commit --amend --no-edit
+ifndef BRANCH
+	$(error BRANCH is not set. Usage: make bump VERSION=x.y.z BRANCH=dev)
+endif
+	@gh workflow run bump.yaml --ref $(BRANCH) --field version=$(VERSION)