[ENHANCEMENT] Z AI: Toggle to use GLM Coding Plan

[hannesrudolph]

Type

Enhancement

Problem

Users with a Z AI GLM Coding Plan want to use their plan in Roo Code without spending API credits.

Context

• Affects users who have an active GLM Coding Plan with Z AI.
• Provider guidance indicates coding-specific endpoints:
  • International (Z AI): https://api.z.ai/api/coding/paas/v4
  • China (bigmodel): https://open.bigmodel.cn/api/coding/paas/v4
• Standard endpoints for normal API credits:
  • International: https://api.z.ai/api/paas/v4
  • China: https://open.bigmodel.cn/api/paas/v4
• When the plan's window limit is reached, access pauses until the next refresh cycle. Continuing via credits currently requires manually reverting to the standard endpoints.
• We cannot reliably detect plan limits from the client.

Desired behavior

• Add a toggle in Settings > Providers > Z AI: Use GLM Coding Plan.
• Default: Off.
• When On: route Z AI requests through the coding-plan endpoints based on the selected region:
  • International: https://api.z.ai/api/coding/paas/v4
  • China: https://open.bigmodel.cn/api/coding/paas/v4
• When Off: route through the standard endpoints:
  • International: https://api.z.ai/api/paas/v4
  • China: https://open.bigmodel.cn/api/paas/v4
• If requests appear paused due to plan limits, show a brief notice explaining the situation and that the user can turn the toggle Off to continue with API credits.

Constraints/Preferences

• Keep the control lightweight and unobtrusive.
• Remember the user's choice for the Z AI provider.
• Include brief helper text under the toggle explaining behavior and manual switchback.
• No automatic fallback at limit for now.

I'm exploring a potential fix for adding the GLM Coding Plan toggle and will open a PR to share progress

Opened a PR with my attempt at addressing this issue: #8002

The implementation adds a toggle in Settings > Providers > Z AI that allows users with a GLM Coding Plan to route requests through the coding plan endpoints instead of using API credits. The toggle is OFF by default and users can manually switch between plan and credits as needed.

Most CI checks are passing. The translation check failure is expected since only English translations were added - other languages would need to be added by the maintainers. Feedback welcome!

[daniel-lxs]

Fixed by #8003