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docs(sandboxes): document the copilot/github credential split #25821

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docs(sandboxes): document the copilot/github credential split #25821

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docs(sandboxes): document the copilot/github credential split
mdelapenya Aug 13, 2026
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docs(sandboxes): fix Vale lint (Git capitalization)
mdelapenya Aug 13, 2026
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16 changes: 16 additions & 0 deletions content/manuals/ai/sandboxes/security/credentials.md
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Expand Up @@ -134,6 +134,7 @@ reads and the API domains the proxy injects credentials into:
| Service | Environment variables | API domains |
| ------------ | ---------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| `anthropic` | `ANTHROPIC_API_KEY` | `api.anthropic.com`, `console.anthropic.com`, `claude.ai`, `mcp-proxy.anthropic.com` |
| `copilot` | `COPILOT_GITHUB_TOKEN` | `api.githubcopilot.com`, `api.business.githubcopilot.com`, `api.enterprise.githubcopilot.com`, `api.individual.githubcopilot.com`, `copilot.github.com` |
| `cursor` | `CURSOR_API_KEY` | `api2.cursor.sh`, `api3.cursor.sh`, `repo42.cursor.sh`, `cursor.com` |
| `droid` | `FACTORY_API_KEY` | `api.factory.ai`, `app.factory.ai`, `relay.factory.ai` |
| `github` | `GH_TOKEN`, `GITHUB_TOKEN` | `api.github.com`, `github.com`, `raw.githubusercontent.com`, `gist.github.com`, `copilot.github.com`, `api.githubcopilot.com` |
Expand All @@ -148,6 +149,21 @@ reads and the API domains the proxy injects credentials into:
When you store a secret with `sbx secret set <service>`, the proxy injects
it into requests to the listed API domains.

> [!NOTE]
> `github` and `copilot` are separate secrets because they need different
> token types. GitHub Copilot's own API rejects classic personal access
> tokens, so it needs a fine-grained PAT with the `Copilot Requests`
> permission — but a fine-grained PAT can't also cover general `gh`/Git
> access the way a classic PAT does. Set `github` to a classic PAT (or an
> OAuth-based token) for repository access, and `copilot` to a fine-grained

@dvdksn dvdksn Aug 14, 2026

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Maybe this is more helpful, wdyt?

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> OAuth-based token) for repository access, and `copilot` to a fine-grained
> OAuth-based token generated with `gh auth token`) for repository access, and `copilot` to a fine-grained

> PAT for Copilot API access.
>
> `api.githubcopilot.com` and `copilot.github.com` appear under both rows
> because which secret injects into them depends on the kit: the `copilot`
> kit uses its own `copilot` secret for them, while other kits (`opencode`,
> `docker-agent`) route the same domains through their `github` secret
> instead.

### Services declared by kits

Custom kits can declare their own service identifiers in `spec.yaml`. In
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