[MODEL] Subagent(s) of Claude Code Opus 4.7 missed trivial items

Preflight Checklist

• [x] I have searched existing issues for similar behavior reports
• [x] This report does NOT contain sensitive information (API keys, passwords, etc.)

Type of Behavior Issue

Subagent behaved unexpectedly

What You Asked Claude to Do

659d8bd6-5f59-4ba3-9073-8e800a67bd8d.txt

Explore subagent, invoked under an Opus 4.7 main session, failed to catch TrackItem placement bugs in MembersController.EditLicence POST and a missing TrackItem in DeleteConfirmed — both trivially findable by grep. If subagents silently run on a weaker model, the user should be able to see/override that per invocation.

Attached is the session Log

What Claude Actually Did

See session Log

Expected Behavior

See session Log

Files Affected

See session Log

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Haven't tried to reproduce

Steps to Reproduce

_No response_

Claude Model

Opus

Relevant Conversation

See session Log

Impact

High - Significant unwanted changes

Claude Code Version

Claude Code CLI 2.1.81.

Platform

Anthropic API

Additional Context

See session Log