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Type of Behavior Issue

Claude modified files I didn't ask it to modify

What You Asked Claude to Do

⏺ Mistakes made today, in order:

1. Wrong color mapping — Proposed 3-band layout for 4 colors. User had to correct: "FOUR." Required a rewrite.
2. MeshBasicMaterial shipped — Spec explicitly said MeshStandardMaterial. Missed it. Required a separate fix pass (Gap 1).
3. sRGB color space shipped — Spec explicitly said linear. Missed it. Required a separate fix pass (Gap 2).

What Claude Actually Did

⏺ Mistakes made today, in order:

1. Wrong color mapping — Proposed 3-band layout for 4 colors. User had to correct: "FOUR." Required a rewrite.
2. MeshBasicMaterial shipped — Spec explicitly said MeshStandardMaterial. Missed it. Required a separate fix pass (Gap 1).
3. sRGB color space shipped — Spec explicitly said linear. Missed it. Required a separate fix pass (Gap 2).

Expected Behavior

⏺ Mistakes made today, in order:

1. Wrong color mapping — Proposed 3-band layout for 4 colors. User had to correct: "FOUR." Required a rewrite.
2. MeshBasicMaterial shipped — Spec explicitly said MeshStandardMaterial. Missed it. Required a separate fix pass (Gap 1).
3. sRGB color space shipped — Spec explicitly said linear. Missed it. Required a separate fix pass (Gap 2).

Files Affected

Permission Mode

Accept Edits was ON (auto-accepting changes)

Can You Reproduce This?

Yes, every time with the same prompt

Steps to Reproduce

_No response_

Claude Model

Sonnet

Relevant Conversation

Impact

Critical - Data loss or corrupted project

Claude Code Version

Opus 4.6

Platform

Anthropic API

Additional Context

_No response_