diff --git a/.github/workflows/bump-develop-version.yml b/.github/workflows/bump-develop-version.yml
index db8c952ade..83dbf28ab0 100644
--- a/.github/workflows/bump-develop-version.yml
+++ b/.github/workflows/bump-develop-version.yml
@@ -102,8 +102,13 @@ jobs:
           jq '.version' wheels.json
 
       - name: Open bump PR
+        # add-paths: commit only wheels.json, whatever else is in the tree.
+        # CI: a PR opened with GITHUB_TOKEN does not trigger workflows. Whoever
+        # handles the bump PR pushes a commit (an empty one is fine) to its
+        # branch to start CI.
         uses: peter-evans/create-pull-request@v8.1.1
         with:
+          add-paths: wheels.json
           branch: "auto-bump/develop-${{ env.NEW_VERSION }}"
           title: "chore: bump develop snapshot target to ${{ env.NEW_VERSION }}"
           body: |
diff --git a/.github/workflows/rustcfml-version-check.yml b/.github/workflows/rustcfml-version-check.yml
index bb817cbc90..abdc725b3c 100644
--- a/.github/workflows/rustcfml-version-check.yml
+++ b/.github/workflows/rustcfml-version-check.yml
@@ -54,9 +54,23 @@ jobs:
       - name: Open bump PR
         # Only from develop: a branch dispatch that happens to go green must not
         # open a bump PR built on a feature branch.
+        #
+        # add-paths: the suite run leaves logs and caches in the working tree
+        # (public/logs/, tools/ci/__pycache__/), and create-pull-request stages
+        # every change by default, so commit only the files bump-pin.sh and
+        # --write-baseline produce (#4577).
+        #
+        # CI: a PR opened with GITHUB_TOKEN does not trigger workflows. Whoever
+        # handles the bump PR pushes a commit (an empty one is fine) to its
+        # branch to start CI, as for the develop version bump.
         if: env.RUSTCFML_LATEST != '' && github.ref == 'refs/heads/develop'
         uses: peter-evans/create-pull-request@v8.1.1
         with:
+          add-paths: |
+            tools/rustcfml/ENGINE_VERSION
+            tools/rustcfml/ENGINE_SHA256
+            tools/rustcfml/baseline.json
+            cli/lucli/services/rustcfml/RustCFMLEngine.cfc
           branch: "auto-bump/rustcfml-${{ env.RUSTCFML_LATEST }}"
           title: "chore(rustcfml): bump engine pin to ${{ env.RUSTCFML_LATEST }}"
           body: |
diff --git a/.gitignore b/.gitignore
index 8480c16646..612a3feec3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -120,3 +120,9 @@ lucee.json.test-local.bak
 
 # Built at release/snapshot time by tools/build/scripts/build-docs-index.mjs (wheels lookup)
 cli/lucli/data/docs-index.json
+
+# Written by the demo app and test runs (e.g. the RustCFML version check, #4577)
+public/logs/
+
+# Python bytecode from tools/ci scripts
+__pycache__/