[Regression in v1.0.42] setup-bun token usage broken on GHES

Describe the bug
This commit (merged in #861) breaks installs GitHub Enterprise Server (GHES) because it expects a token valid for github.com.

To Reproduce
Steps to reproduce the behavior:

Run GitHub Enterprise Server
Setup GitHub Actions workflow using anthropics/claude-code-action per official docs
Trigger action
See error

Expected behavior
This action, along with the setup-bun action, should minimize use of GitHub API to avoid API limits rather than requiring token usage. Alternatively, expose a separate input to be passed to setup-bun rather than defaulting to the token passed to claude-code-action as this one is needed for interacting with GHES repositories.

Screenshots

Workflow yml file

API Provider

[ ] Anthropic First-Party API (default)
[ ] AWS Bedrock
[ ] GCP Vertex

Additional context
N/A

Apologies everyone, noticed this bug while testing #861 internally but forgot to push latest changes to the PR before it was merged...
Actual fix is in #901

Can confirm that this exact error also occurs on GitHub Enterprise (GHE) as well

What actions/create-github-app-token@v1 shows in the logs:

Run actions/create-github-app-token@v1
  with:
    app-id: ***
    private-key: ***
  
    github-api-url: https://api.{name of our domain}.ghe.com/

Error:

Error: Error: Failed to fetch url https://api.github.com/repos/oven-sh/bun/git/refs/tags. (status code: 401, status text: Unauthorized)
{
  "message": "Bad credentials",
  "documentation_url": "https://docs.github.com/rest",
  "status": "401"
}

I was running into the same issue today and created #1001 to resolve it :)

Actual 'fix' is #913 for anyone hitting this. However, for some reason the team is behind on merging docs PRs.

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[Regression in v1.0.42] setup-bun token usage broken on GHES #896

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[Regression in v1.0.42] setup-bun token usage broken on GHES #896

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peloyeje commented on Feb 4, 2026

uda832 commented on Feb 4, 2026

luka5 commented on Mar 3, 2026

dr-goo commented on Mar 17, 2026

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