Agent Breaking Changes_

← Cline

Cline SDK v0.0.88

2026-09-30 · official notes

Summary

• Direct Anthropic requests now ask the Claude API for its recommended server-side refusal fallback (anthropic.fallbacks: "default"), and OpenRouter and Cline requests for Anthropic models set provider.
• A Stop issued while a turn is still being prepared is no longer dropped. The agent runtime ignores abort() with no run in flight, so a Stop that landed between runTurn() entry and the run start (sessi
• Content-filtered turns are no longer reported as empty responses. content-filter is a new AgentModelFinishReason, mapped by both the AI SDK and ApiHandler adapters (including the compat round trip); t

Full notes

- Direct Anthropic requests now ask the Claude API for its recommended server-side refusal fallback (`anthropic.fallbacks: "default"`), and OpenRouter and Cline requests for Anthropic models set `provider.allow_fallbacks` so a request can fail over to another upstream provider instead of failing outright
- A Stop issued while a turn is still being prepared is no longer dropped. The agent runtime ignores `abort()` with no run in flight, so a Stop that landed between `runTurn()` entry and the run start (session persistence, the git metadata refresh, credential sync) was lost and the turn kept running while the host showed it as stopped. `LocalRuntimeHost` now re-sends the abort once the run exists, and clears a leftover between-turns abort flag when a new turn starts so it can't cancel the next prompt
- Content-filtered turns are no longer reported as empty responses. `content-filter` is a new `AgentModelFinishReason`, mapped by both the AI SDK and ApiHandler adapters (including the compat round trip); the run fails with a message saying the response was blocked by a content filter and suggesting a rephrase, and the run-failed `sdk.error` event carries the turn's finish reason
- Resuming an existing session works again. 0.0.87 added a duplicate-start guard that rejected starting an existing session ID with "session already exists", which blocked desktop and TUI resume; the guard is reverted, and the cloud controller keeps initial thinking and reasoning-effort preferences in session metadata instead
- `NodeHubClient` registers `{ version, pid }` metadata (version defaults to the `@cline/core` version, overridable with `clientVersion`). `hub.client.registered` includes it, and the Cline Hub web app shows it for connected clients and in join/leave events
- `@ai-sdk/amazon-bedrock` moves to `^5.0.98`, so Nova 2 Lite with high reasoning effort no longer returns a 400
- Refreshed the model catalog. GPT-6.1 Sol becomes the default model for OpenAI, OpenRouter, GitHub Copilot, Cortecs, Eden AI, Kilo Gateway, both LLM Gateway providers, NanoGPT, OpenCode Zen, and Requesty. Vercel AI Gateway moves to Ling 3.1 Flash, Tempr Gateway to MiMo V2.6 Flash, CrossModel and Ofox to Claude Sonnet 5.5, Pioneer to GLiNER 2.5 Decide, and Scaleway to Qwen 3.8 27B. New models include Grok 4.7 on Bedrock, DeepSeek V4.1 Flash on Nebius, and Qwen 3.8 27B on Cerebras and Groq; the Claude Opus 4 variants are dropped

**Full Changelog**: https://github.com/cline/cline/compare/sdk/sdk/v0.0.87...sdk/sdk/v0.0.88