Borrowing it
Nothing to install: this file belongs to nklisch/claude-code-modes. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/nklisch/claude-code-modes/main/.claude/skills/prompt-evaluate/SKILL.mdgit clone --depth 1 https://github.com/nklisch/claude-code-modesWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/nklisch/claude-code-modes/prompt-evaluate)<a href="https://agentmods.dev/skills/nklisch/claude-code-modes/prompt-evaluate"><img src="https://agentmods.dev/badge/skills/nklisch/claude-code-modes/prompt-evaluate/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/nklisch/claude-code-modes/prompt-evaluate"><img src="https://agentmods.dev/badge/skills/nklisch/claude-code-modes/prompt-evaluate.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00079 | $0.01014 |
| Opus 5.5 | $0.00032 | $0.00406 |
| Sonnet 5.5 | $0.00016 | $0.00203 |
| Haiku 4.5 | $0.00008 | $0.00101 |
Grade A, and why
prompt-evaluate scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Prompt Evaluate
Score prompt content for claude-code-modes against 10 quality criteria grounded in Anthropic's emotion research and prompt engineering best practices.
Before starting
Read these references:
- references/emotion-research.md — emotion vector findings
- references/prompt-quality.md — 10 quality criteria with thresholds
- references/scoring-rubric.md — measurement methods and commands
Phase 1: Identify what to evaluate
Determine the target. Options:
A base directory — e.g., prompts/chill/ or a custom base path. Read all fragment files and the manifest.
A modifier file — e.g., prompts/modifiers/debug.md. Read the single file.
An assembled prompt — run bun run src/build-prompt.ts <preset> [--base <base>] --print to get the fully assembled output. This is the most comprehensive evaluation since it includes axis fragments and modifiers.
A file path provided by the user — read it directly.
If the user doesn't specify, ask what to evaluate.
Phase 2: Run measurements
For each of the 10 criteria, collect data using the methods in references/scoring-rubric.md.
Automated measurements
Run these commands against the target files:
# 1. Negative instruction count
grep -ciE '\b(don.t|do not|never|avoid|must not|should not|cannot)\b' <files>
# 2. ALL-CAPS emphasis count
grep -cE '\b(IMPORTANT|CRITICAL|MUST|NEVER|DO NOT)\b' <files>
# 4. Worked examples count
grep -c '<example>' <files>
# 5. Priority hierarchy presence
grep -ciE '(when.*conflict|priority|comes first|takes precedence)' <files>
# 7. Character count (token efficiency)
wc -c <files>
Manual assessments
For criteria that require reading and judgment (3, 6, 8, 9, 10), read the content and assess against the rubric thresholds.
Phase 3: Produce scorecard
Present results as a table. For each criterion, show: rating (Good/Concerning/Poor), measured value, and a specific finding.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 115 lines · 79 tokens per session scan A 3a30d9013c74
prompt-evaluate is a skill published in the GitHub repository nklisch/claude-code-modes (117 stars, last pushed 29d ago), licensed MIT. It adds 79 tokens to every session and 1,014 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
llm-app-patterns
Production-ready patterns for building LLM applications. Covers RAG pipelines, agent architectures, prompt IDEs, and LLMOps monitoring. Use when designing AI applications, implementing RAG, building agents, or setting up LLM observability.
prompt-engineer
Writes, refactors, and evaluates prompts for LLMs — generating optimized prompt templates, structured output schemas, evaluation rubrics, and test suites. Use when designing prompts for new LLM applications, refactoring existing prompts for better accuracy or token efficiency, implementing chain-of-thought or few-shot…
prompt-optimization
Improve a prompt on the evaluations workbench through a measured loop. Score the baseline first, then duplicate the target column, form a hypothesis from failing rows, edit the copy's prompt draft, run, compare pass rate and cost, and repeat until the numbers hold. Use when the user asks to optimize or improve a…
omh-model-optimization
This is a Hermes-native model-optimization workflow skill.
ideogram4
Prompting patterns for Ideogram 4 text-to-image — best-in-class in-image text rendering and exact color/layout control via structured JSON captions. Use when generating images that need legible on-image text (title cards, thumbnails, logos, signage, CTAs), precise brand colors, or controlled spatial layout. Triggers…
prompt-library-for-startups
AWS-curated copy-paste prompts for AI coding agents (MVP scaffolding, RAG chatbot with Claude on Bedrock, security baseline evaluation, cost anomaly detection, GPU quota requests, EKS deployment, Well-Architected review, etc.) plus downloadable installable agents (Multi-Account Transition Advisor, Bill Shock…