Hi all!

First of all I want to say I absolutely love github actions, great work! I used them every day and they are a delight. I started to poke around and build my own actions.
My aim with one of them is to, whenever I push a commit to my publish branch of a given repo, I want an action to run and run git rebase publish on the master branch. Seems pretty straight forward. 
I built and tested it here: https://github.com/MaximeHeckel/github-action-rebase/tree/publish

However, I can’t seem to perform a successful rebase operation:

/usr/bin/git rebase publish
First, rewinding head to replay your work on top of it...

Applying: Initial Commit

Using index info to reconstruct a base tree...

Falling back to patching base and 3-way merge...

CONFLICT (add/add): Merge conflict in README.md

Auto-merging README.md

No changes -- Patch already applied.

Applying: feat(action): First iteration of the rebase github action

Using index info to reconstruct a base tree...

Falling back to patching base and 3-way merge...

CONFLICT (add/add): Merge conflict in index.js

Auto-merging index.js

CONFLICT (add/add): Merge conflict in dist/index.js

Auto-merging dist/index.js

CONFLICT (add/add): Merge conflict in .gitignore

Auto-merging .gitignore

CONFLICT (add/add): Merge conflict in .github/workflows/test.yml

Auto-merging .github/workflows/test.yml

error: Failed to merge in the changes.

hint: Use 'git am --show-current-patch' to see the failed patch

Patch failed at 0002 feat(action): First iteration of the rebase github action

Resolve all conflicts manually, mark them as resolved with

"git add/rm <conflicted_files>", then run "git rebase --continue".

You can instead skip this commit: run "git rebase --skip".

To abort and get back to the state before "git rebase", run "git rebase --abort".

Despite looking around and trying different approaches to debug this, I can’t make it work.
The branches do not conflict when running the same command manually obviously.

What am I doing wrong? Am I missing something obvious?

Workflow example: https://github.com/MaximeHeckel/github-action-rebase/blob/publish/.github/workflows/test.yml

Source: https://github.com/MaximeHeckel/github-action-rebase/blob/publish/index.js

Thank you in advance!