refactor: consolidate loopback OAuth-callback pattern (altimate.ts + browser-handoff.ts)
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 68/100
- Issue type
- Refactor
- Clarity
- Mostly clear
- Activity status
- Active
- Tech stack
- typescript
- Domain
- authentication, security
Research direction
Compare packages/opencode/src/altimate/workspace/browser-handoff.ts with altimate.ts's gateway sign-in flow, focusing first on their loopback-listener patterns and the existing Host-header guard. Done means both flows call a shared helper and altimate.ts applies the same DNS-rebinding check; verify the two sign-in flows still work correctly.
Written by the indexing model from the issue text.
Description
Found during v0.9.7 release review (Tech Lead persona), referencing the deliberate duplication called out in eb1124ee8c (#1100)'s own commit message ('shared-helper refactor is a follow-up ticket once both flows have prod experience').
packages/opencode/src/altimate/workspace/browser-handoff.ts duplicates the loopback-listener pattern from altimate.ts's gateway sign-in flow. In the process, browser-handoff.ts added a DNS-rebinding Host-header guard that altimate.ts does NOT have (confirmed via git log v0.9.6..HEAD -- .../altimate.ts = empty, i.e. altimate.ts is unchanged this release).
Scope this refactor to:
- Extract a shared loopback-listener helper both flows call.
- Backport the Host-header DNS-rebinding check into altimate.ts's sign-in flow so it gets the same hardening.
Not urgent — both flows currently work correctly on their own, this is a maintainability/consistency cleanup.
- Dominant language
- TypeScript
- Stars
- 813
- Forks
- 134
- Avg merge
- 1d 19h
- Merged PRs (30d)
- 64
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