Track Claude Code 2.1.201 upstream release

[a5c-ai]

Upstream version update: Claude Code

• Previous graph version: 2.1.199
• Latest upstream version: 2.1.201
• Package checked: @anthropic-ai/claude-code
• Install method/package: unchanged, npm install -g @anthropic-ai/claude-code

Sources read:

• Release notes: https://github.com/anthropics/claude-code/releases/tag/v2.1.201
• npm latest check: npm view @anthropic-ai/claude-code@latest version returned 2.1.201

Research summary:
The v2.1.201 release notes say Claude Sonnet 5 sessions no longer use the mid-conversation system role for harness reminders. I found no published package-name, install-method, CLI flag, transport, or migration change in this release.

Likely system impact:

• Prompt/harness assembly metadata should recognize that Claude Sonnet 5 harness reminders are no longer represented as mid-conversation system-role messages.
• Stream transport, MCP handling, and CLI launch flags appear unchanged.
• Model capability metadata remains tied to the existing Claude Sonnet 5 support from prior records.

Migration notes:
No migration steps were published.

Assimilation checklist:

• Update Claude prompt/harness modeling notes: Sonnet 5 harness reminders no longer use mid-conversation system-role messages.
• Verify any Claude transcript parser does not require these reminders to appear as system role turns.
• Leave launchBehavior and install docs unchanged for @anthropic-ai/claude-code.

[a5c-ai]

Duplicate of #1167. See that issue for tracking.