Desktop app: provider/model/MCP fail to load on startup

[ssc-esiemiat]

Summary

The Opencode desktop app is unusable since it fails to load provider/model/MCP information during roughly 80% of application starts for multiple users in my organization. This is a version regression: v1.18.4 works correctly; every version from v1.18.5 through v1.18.13 is broken. Downgrading to v1.18.4 fixes the issue. Windows 11 Enterprise.

On affected starts, a stack of toast errors appears immediately — one "Failed to reload [name]: UnsupportedContentType" and one "Failed to reload [name]: Cannot read properties of undefined (reading 'temperature')" per configured provider/MCP:

Environment

• Custom providers via @ai-sdk/openai-compatible (no built-in API keys)
• Last known good version: v1.18.4
• First broken version: v1.18.5
• Confirmed still broken: v1.18.13

Symptoms

• Renderer: Failed to finish bootstrap instance TypeError: Cannot read properties of undefined (reading 'temperature')
• Toast: "Failed to reload [ProjectName] — UnsupportedContentType"
• Toast: "Failed to reload [ProjectName] — Cannot read properties of undefined (reading 'temperature')"
• Provider list empty, MCP list empty, model selector shows nothing

Renderer logs (crash sessions)

[2026-07-31 08:41:55.871] [error] Failed to finish bootstrap instance TypeError: Cannot read properties of undefined (reading 'temperature')
[2026-07-31 08:30:51.103] [error] Failed to finish bootstrap instance TypeError: Cannot read properties of undefined (reading 'temperature')
[2026-07-29 17:15:46.086] [error] Failed to finish bootstrap instance TypeError: Cannot read properties of undefined (reading 'temperature')

Sidecar log (no errors during crash)

timestamp=2026-07-31T12:41:41.058Z level=INFO message=loading path="...opencode.jsonc"
timestamp=2026-07-31T12:41:44.176Z level=INFO message=bootstrapping directory="...WinISO-Builder"
timestamp=2026-07-31T12:41:44.229Z level=INFO message=init

Config loads at :41.058, init completes at :44.229. Renderer crash logged at :55.871, well after init completes.

What I tried

• OPENCODE_DISABLE_MODELS_FETCH=1 — did not fix
• OPENCODE_DISABLE_AUTOUPDATE=1 — did not fix
• autoupdate: false in opencode.jsonc — did not fix
• Relaunching repeatedly — Works every so often
• Downgrading to v1.18.4 — fixed

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [Bug] Desktop v1.17.14 Provider.list() TypeError crash - UI shows no models/providers on every startup #35772: Same Desktop/Windows symptoms — providers and models fail to load on startup with a TypeError in a similar code path (Cannot read properties of undefined)
• OpenCode Zen requests take ~5 minutes and sometimes throw UnsupportedContentType (Desktop v1.14.29, Windows) #39178: Same UnsupportedContentType error on Desktop (Windows)

If your issue is distinct (e.g. specific to the v1.18.5+ regression or the temperature property specifically), please add a note clarifying the difference from those issues so maintainers can track it separately.

[ssc-esiemiat]

These are not the same issues. They aren't even the same version of the Desktop app. That was just 1 error among many and it's most likely a coincidence that the error appears in multiple tickets.