Rules in 49.6: Major Issues Uncovered

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Title: Verification Instructions for Cursor Rules Bugs in 49.6

Overview: These instructions allow Cursor 49.6 users to verify two critical bugs in .mdc rules (Gemini 2.5 agent mode): Bug 1 (Auto Attached rules failing to load) and Bug 2 (Always rules unstable in long sessions). Follow the steps to replicate and confirm.

Bug 1: Auto Attached Rule Loading Failure

Description: Auto Attached rules for specific file types (e.g., *.txt) often fail to apply when opening or referencing files, despite correct setup.

Verification Steps:

  1. Create .cursor/rules/test.mdc:
    ---
globs: *.txt
type: Auto Attached
---
Add comment: "# Test Rule" to text files.
  2. Create test.txt: “Test content.”
  3. Open Cursor 49.6, start an agent session (Gemini 2.5).
  4. Open test.txt.
  5. Submit prompt: “Modify test.txt to add a line.”
  6. Check if “# Test Rule” appears in the modified test.txt or output.

Expected Result: The comment “# Test Rule” is consistently added to test.txt modifications.

Actual Result to Verify: In most attempts, “# Test Rule” is missing, indicating the rule failed to load or apply.

Notes: Try multiple times and with different file types (e.g., *.py). Failures are frequent across .cursor/rules and workspace root.

Bug 2: Always Rule Stability Failure

Description: Always rules apply initially but frequently fail in longer sessions, missing headers in responses.

Verification Steps:

  1. Create .cursor/rules/core.mdc:
    ---
type: Always
---
Add header: "# Core Rule" to all AI responses.
  2. Open Cursor 49.6, start an agent session (Gemini 2.5).
  3. Submit 10 diverse prompts in sequence (e.g., “List files,” “What day is it?”, “Modify @test.txt”, “Explain Python lists”).
  4. Check each response for the “# Core Rule” header.

Expected Result: The “# Core Rule” header appears in every response.

Actual Result to Verify: The header is missing in most responses (e.g., 8/10 prompts), often starting after the first or second prompt, showing intermittent failure.

Notes: Test in a single session to mimic extended use. The pattern (e.g., missing, present, missing) may appear early.

Environment:

  • Cursor Version: 49.6
  • Model: Gemini 2.5
  • OS: Windows (likely applicable to other OS)

Reporting: If you confirm these issues, reply to the bug reports:

Tested: Oct 26-28, 2024