v2.0.0 — OpenCode SDK v2 Migration

What's Changed

Migrates the provider from OpenCode SDK v1 to v2 (@opencode-ai/sdk/v2), adding support for new v2 capabilities and hardening the implementation.

Core Migration

• SDK v2 API style: All SDK calls migrated from nested { path, body } to v2 flat parameter style ({ sessionID, directory, ... })
• Import path: @opencode-ai/sdk → @opencode-ai/sdk/v2
• Dependency bumps: @ai-sdk/provider ^3.0.8, @ai-sdk/provider-utils ^4.0.15, ai ^6.0.85

New Features

• Permission/tool approval flow: Emits tool-approval-request stream parts from permission.asked events; handles tool-approval-response parts via permission.reply() API
• Native structured output: JSON mode uses OpenCode's native json_schema format with retryCount instead of prompt-based instructions
• File/source content streaming: handleFilePart() fully implemented — handles data URLs, HTTP URLs, and source metadata
• New settings: permission (ruleset), variant, directory (per-request routing), outputFormatRetryCount
• New error types: ContextOverflowError → "length", StructuredOutputError → "error"

Hardening

• Question events: question.asked emits a stream error part with warning; related events are known no-ops
• Known v2 events/parts: All new v2 event and part types explicitly handled (no "Unknown" debug spam)
• Safe tool input serialization: safeStringifyToolInput() with try/catch fallback
• Typed approval client: ApprovalClient interface replaces loose typing
• File part diagnostics: Debug logs when file parts are skipped
• Non-prefix tool input delta: Prevents data loss on non-incremental input changes

Deprecations

• tools setting → use permission ruleset
• cwd setting → use directory

Tests

• 283 tests passing (up from 278)

Full Changelog: v1.0.0...v2.0.0