Prompt Grade
Prompt Grade scores each prompt you send against a seven-point rubric. The judge runs after the prompt is captured and produces a single letter grade from A+ down to F.
How a prompt is graded
Section titled “How a prompt is graded”Each prompt is checked against seven habits, each rooted in Anthropic’s Claude Code prompting guide. Not every check applies to every prompt — the judge marks which checks are applicable based on intent (fix, plan, explore, etc.).
The seven checks roll up into four pillars (Clarity · Context · Verification · Workflow) — see the Skill page for the full list.
APG — Average Prompt Grade
Section titled “APG — Average Prompt Grade”Each letter maps to a numeric score, rescaled to a 0–100 scale (A+ = 100, F = 0) so it lines up with the PRISM Score. APG is the mean across all scored prompts in the selected range.
APG = mean(prompt_score_0_100) across prompts where judge_status = "ok"The headline number is APG; the badge next to it is the closest letter grade.
Weak · Fair · Good · Great.
How it relates to other pages
Section titled “How it relates to other pages”- Skill summarizes APG as a 0–10 score and breaks it down by pillar.
- This page is the per-prompt drill-down — see which prompts pulled the average down and why.