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fix(ai): honor server-provided slow_down interval in device-code polling

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GitHub's device flow documents slow_down as a rate limit: a poll that
arrives inside the throttle window is answered with slow_down instead of
the token, and the response's interval field reports the new required
minimum ("adds 5 seconds to the last interval"). A client that only
tracks its own +5s increment can stay behind the server's ratcheting
requirement when its timers fire early - common with WSL/VM clock drift
(microsoft/WSL#10006) - so every subsequent poll keeps hitting the rate
limit and login appears to hang forever even after the browser reports
the device as authorized.

Adopt the server-provided interval when a slow_down poll result carries
one, falling back to the RFC 8628 section 3.5 +5s increment otherwise.
GitHub Copilot passes the interval field through.

This restores part of the #1994 mitigations that were lost in the #4788
device-code refactor.

refs #6187
This commit is contained in:
Vegard Stikbakke
2026-07-03 22:21:25 +02:00
parent 23d1462611
commit 8133c94db9
5 changed files with 79 additions and 8 deletions
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packages/ai/CHANGELOG.md
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@@ -5,6 +5,7 @@
### Fixed
- Fixed GitHub Copilot device-code login polling to wait before the first token poll, avoiding incorrect device-code failures for some users after browser authorization ([#6187](https://github.com/earendil-works/pi/issues/6187)).
- Fixed OAuth device-code polling to honor the server-provided `slow_down` interval instead of only applying the RFC 8628 5-second increment, so GitHub Copilot login recovers instead of appearing to hang when polls arrive early (e.g. WSL/VM clock drift) ([#6187](https://github.com/earendil-works/pi/issues/6187)).
- Fixed OpenAI Codex user-agent construction to synchronously load Node OS metadata, avoiding a startup race that could report `pi (browser)` in Node/Bun.
- Fixed Fireworks GLM 5.2 Fast to use the OpenAI-compatible endpoint and `thinkingLevelMap`, aligning it with GLM 5.2 ([#6195](https://github.com/earendil-works/pi/issues/6195)).
- Fixed Amazon Bedrock prompt-cache points for Claude Fable 5 and Claude Sonnet 5 ([#6235](https://github.com/earendil-works/pi/issues/6235)).