OpenCode v1.17.5–v1.17.6: MCP Client Capabilities Declaration and Snowflake OAuth
SST
SST shipped two OpenCode releases on June 13, 2026. v1.17.6 formally declares OpenCode's supported MCP client capabilities — establishing a stable compatibility target for MCP server authors. v1.17.5 adds external browser OAuth for Snowflake Cortex (enabling auth without embedding credentials), improves project copy management and session move flows in the v2 API, recovers expired MCP sessions instead of leaving tools disconnected, returns structured MCP tool output in human-readable form, and fixes duplicate renderable IDs that could break TUI rendering. The desktop layer gains updated oc-2 color themes and improved terminal resize handling.
Why it matters
The MCP client capabilities declaration in v1.17.6 gives MCP server developers a stable target, reducing breakage from protocol mismatches. Snowflake Cortex OAuth makes OpenCode usable in enterprise data workflows without credential embedding.
Importance: 2/5
Two consecutive releases with MCP interoperability improvements and enterprise OAuth; steady cadence in the open-source coding agent space.