feat: automatic cloudflare login

[john-royal]

Automatically logs in with Cloudflare when Wrangler config is unavailable or if the token refresh fails. Should help with #438.

• This does introduce a new dependency, open — this is because opening the URL cross-platform gets messy fast. I tried a simpler in-house method but seemed to completely butcher the URL. Happy to look at this further if we want to avoid the dependency.
• Auto-login is disabled when CI is detected or if the terminal seems to be non-interactive.
• Right now this is built into the current Cloudflare client setup, but we might want to make this part of the alchemy create CLI.

Idea: It would be really cool if we marked API requests as requiring specific scopes so we can start the reauthorization flow automatically if we hit an auth error.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/sam-goodwin/alchemy@475

commit: 96f1a5f

[github-actions]

🚀 Website Preview Deployed

Your website preview is ready!

Preview URL:

This preview was built from commit de8f66b

---

_{🤖 This comment will be updated automatically when you push new commits to this PR.}

[sam-goodwin]

@claude please add a new command in alchemy/bin for alchemy login that:

1. opens the same login flow to cloudflare like this PR does
2. allows overriding the scopes via a CLI argument

[claude]

Claude finished @sam-goodwin's task —— View job

---

I've successfully added the alchemy login command that reuses the login flow from this PR!

Tasks:

• Read repository guidelines and understand existing CLI structure
• Analyze the current login flow implementation
• Extract reusable login logic
• Create new CLI command with scope override support
• Test the implementation
• Run linting and formatting
• Commit changes

✅ Implementation Complete!

I've successfully added the alchemy login command with the following features:

1. Reusable Login Function: Created loginToCloudflare() in auth.ts that accepts custom scopes
2. CLI Command: Added login command to the CLI router with scope override support
3. User Experience: Clean command interface with progress messages and scope listings

Usage:

# Login with default scopes (all available)
alchemy login

# Login with custom scopes
alchemy login --scopes="account:read,user:read,workers:write"

The implementation:

• ✅ Passes biome linting and formatting
• ✅ Builds successfully with TypeScript
• ✅ Follows repository conventions
• ✅ Handles interactive terminal detection
• ✅ Provides clear error messages

Committed as: adf84ef - All changes have been added to this PR branch.

[github-actions]

🚀 Website Preview Deployed

Your website preview is ready!

Preview URL: https://9f7588d3-alchemy-website.alchemy-run.workers.dev

This preview was built from commit d6d05d6

---

_{🤖 This comment will be updated automatically when you push new commits to this PR.}

[john-royal]

Replaced by #631