# opencode 1.18.9: legacy MCP SDK client compatibility restored

> Follow-up patch restoring compatibility with legacy MCP SDK clients, plus desktop crash fixes and an opt-in V2 desktop sidecar backed by the bundled CLI service.

| | |
|---|---|
| **Tool** | opencode |
| **Version** | v1.18.9 |
| **Kind** | release |
| **Published** | 2026-07-28 |
| **Observed** | 2026-08-11 |
| **Significance** | 2/5 |
| **Breaking** | no |
| **Categories** | fix, feature |

## What changed


Core:
- Restored compatibility with legacy MCP SDK clients

Desktop:
- Fixed a Solid cleanup crash that could break navigation
- Home session loading no longer suspends the whole page while the session list updates
- Opt-in V2 desktop sidecar backed by the bundled CLI service
- Collapsible model provider sections in V2 settings; extra vertical borders removed from the V2 home projects view


## Sources

- [github_release](https://github.com/anomalyco/opencode/releases/tag/v1.18.9) — retrieved 2026-08-11

## Community

_No curated reactions recorded. Facts and community takes are kept in separate layers
and never blended._

---
Canonical: https://changelogs.info/opencode/v1-18-9
Entity: https://changelogs.info/opencode
Event ID: `evt_2026-07-28_opencode_v1-18-9`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.