[BUG] VS Code extension hides assistant messages after mid-turn API error + harness retry

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When viewing a past session in the VS Code extension transcript, an entire assistant turn (including its final text response and many tool calls) is invisible in the UI, even though the underlying .jsonl session file contains all the data correctly.

• Claude Code VS Code extension
• Linux (WSL2), Ubuntu

What Should Happen?

All assistant content from the same logical turn should render, including content produced after a transient API error and harness-driven retry.

Error Messages/Logs

Steps to Reproduce

The affected turn has this shape in the JSONL:

1. Assistant issues several tool calls (e.g. WebSearch).
2. Tool results return.
3. An API Error: The socket connection was closed unexpectedly message appears as a synthetic assistant entry.
4. The harness automatically retries; many more tool calls (Write, Bash, etc.) succeed.
5. The assistant produces a final long-form text response.

In the VS Code transcript renderer, only items from step 1 are shown. Steps 2–5 are silently dropped. The user sees orphan tool-call entries with no follow-up, which looks like the assistant never replied.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.133

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

Actual

Renderer appears to treat the synthetic API Error assistant entry as the end of the turn and stops drawing subsequent records.