diff --git a/.pi/prompts/is.md b/.pi/prompts/is.md
index f57561f6..28053dfe 100644
--- a/.pi/prompts/is.md
+++ b/.pi/prompts/is.md
@@ -6,14 +6,16 @@ Analyze GitHub issue(s): $ARGUMENTS
 For each issue:
 
 1. Read the issue in full, including all comments and linked issues/PRs.
+2. Do not trust analysis written in the issue. Independently verify behavior and derive your own analysis from the code and execution path.
 
-2. **For bugs**:
+3. **For bugs**:
    - Ignore any root cause analysis in the issue (likely wrong)
    - Read all related code files in full (no truncation)
    - Trace the code path and identify the actual root cause
    - Propose a fix
 
-3. **For feature requests**:
+4. **For feature requests**:
+   - Do not trust implementation proposals in the issue without verification
    - Read all related code files in full (no truncation)
    - Propose the most concise implementation approach
    - List affected files and changes needed