# Claude Code 2.1.201: harness reminders drop the mid-conversation system role on Sonnet 5

> Single-line release. Claude Code no longer injects harness reminders using the mid-conversation system role in Claude Sonnet 5 sessions. The notes give no reason or user-facing effect.

| | |
|---|---|
| **Tool** | Claude Code |
| **Version** | 2.1.201 |
| **Kind** | release |
| **Published** | 2026-07-03 |
| **Observed** | 2026-08-11 |
| **Significance** | 2/5 |
| **Breaking** | no |
| **Categories** | api-change, model-support |

> **Note:** this classification is below our confidence threshold and is pending human review.

## What changed


- Claude Sonnet 5 sessions no longer use the mid-conversation system role for harness reminders


## Sources

- [changelog_md](https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md) — retrieved 2026-08-11

## Community

_No curated reactions recorded. Facts and community takes are kept in separate layers
and never blended._

---
Canonical: https://changelogs.info/claude-code/2-1-201
Entity: https://changelogs.info/claude-code
Event ID: `evt_2026-07-03_claude-code_2-1-201`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.