diff --git a/packages/pi-coding-agent/src/cli.ts b/packages/pi-coding-agent/src/cli.ts
index b8b722ddc..c1efc7e72 100644
--- a/packages/pi-coding-agent/src/cli.ts
+++ b/packages/pi-coding-agent/src/cli.ts
@@ -12,7 +12,11 @@ import { bedrockProviderModule } from "@singularity-forge/pi-ai/bedrock-provider
 import { EnvHttpProxyAgent, setGlobalDispatcher } from "undici";
 import { main } from "./main.js";
 
-setGlobalDispatcher(new EnvHttpProxyAgent());
+// bodyTimeout/headersTimeout default to 300s in undici; long local-LLM stalls
+// (e.g. vLLM buffering a large tool call) exceed that and abort the SSE stream
+// with UND_ERR_BODY_TIMEOUT. Disable both — provider SDKs enforce their own
+// AbortController-based deadlines via retry.provider.timeoutMs.
+setGlobalDispatcher(new EnvHttpProxyAgent({ bodyTimeout: 0, headersTimeout: 0 }));
 setBedrockProviderModule(bedrockProviderModule);
 
 main(process.argv.slice(2));