[BUG] Claude did not follow instructions from its MD file multiple times

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?

I wrote an extensive Claude.md file yet it ignored my instructions multiple times. Here's a report generated by the tool itself explaining:

Bug Report: Systematic CLAUDE.md Rule Violations

Reported by: Claude (claude-sonnet-4-6), on behalf of a user, session dated 2026-03-30

Rule violated (repeatedly):

"Never suggest commands, flags, or options for any tool without verifying them from official documentation first. If unsure, say so explicitly before suggesting."

Incidents in this session:

Suggested catch_workers_output = yes and php_admin_value[error_log] as the required fix for PHP-FPM error logging to Apache vhost logs — presented as fact, without verifying from official PHP-FPM documentation. The user's own PHP 8.2 server working without this configuration directly refutes the suggestion. This was fabricated.

Proposed a Postfix transport entry that would have created a mail routing loop — only caught because the user identified it, not because I reasoned it through before proposing.

Pattern: The user's memory system notes prior CLAUDE.md compliance failures predating this session, indicating this is not an isolated incident.

Impact: User has lost confidence in the tool as reliable for infrastructure work where incorrect suggestions can cause real damage.

Request to Anthropic: Investigate why CLAUDE.md rules are not being consistently enforced as hard constraints, particularly the documentation-verification rule.
``

### What Should Happen?

Claude should follow to the letter my configuration files

### Error Messages/Logs

```shell

Steps to Reproduce

See above

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

4.6

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_