Before creating ANY new documentation, plans, or artifacts, ALWAYS check if similar documents alr...
SkillScore35Maintained
Automatic
◆Product Management pack
Last verified 8/19/2026
What it changes
Passed 7 of 19 test cases with the skill, and 3 of 19 without it.
Without skill17%
With skill35%
Checks it passed that the model alone missed
The response checks for existing onboarding PRDs before generating a new document.
The response checks for existing push notification epics before creating a new epic.
The response checks for existing search feature specifications before drafting a new spec.
and 1 more in the full report
4 fixed4 passed either way15 still failing0 broke
Pass-rate lift
+17 pp
Tokens
-7%
Agent turns
0%
Response time
-8%
Model gemini-3.6-flashMeasured 8/19/2026v18 of 23 cases passed with skill · 19 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 4
Prompt
We need a user story for migrating PostgreSQL data to DynamoDB. Create a new story file for this database task immediately.
What was checked, without and with the skill
Checked
Without skill
With skill
The response checks for existing database migration user stories before creating a new file.
Missed
Passed
case-06 · gemini-3.6-flash · 8/19/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md3 linessingle file
Check Existing Artifacts
Before creating ANY new documentation, plans, or artifacts, ALWAYS check if similar documents already exist in the project. Search for existing epics, PRDs, stories, and planning documents. NEVER create new versions of documents that already exist—update the existing ones instead. Failing to check causes duplicate/conflicting documents, wasted effort, and version confusion.