Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add cosmicstack-labs/mercury-agent-skills --skill assessment-designgit clone --depth 1 https://github.com/cosmicstack-labs/mercury-agent-skillsWrote 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/cosmicstack-labs/mercury-agent-skills/assessment-design)<a href="https://agentmods.dev/skills/cosmicstack-labs/mercury-agent-skills/assessment-design"><img src="https://agentmods.dev/badge/skills/cosmicstack-labs/mercury-agent-skills/assessment-design/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/cosmicstack-labs/mercury-agent-skills/assessment-design"><img src="https://agentmods.dev/badge/skills/cosmicstack-labs/mercury-agent-skills/assessment-design.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 | $0.00021 | $0.00503 |
| Opus 5 | $0.00010 | $0.00251 |
| Sonnet 5 | $0.00004 | $0.00101 |
| Haiku 4.5 | $0.00002 | $0.00050 |
Grade A, and why
assessment-design 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 8d 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.
What it actually says
Assessment Design
Create fair, effective assessments that measure real learning.
Assessment Types
| Type | Purpose | Frequency | Examples |
|---|---|---|---|
| Diagnostic | Find starting point | Before instruction | Pre-test, KWL chart |
| Formative | Guide learning | Ongoing | Exit tickets, quizzes, discussion |
| Summative | Evaluate achievement | End of unit | Exam, project, presentation |
| Authentic | Real-world application | Culminating | Portfolio, case study, simulation |
| Competency-based | Demonstrate mastery | On demand | Performance tasks, certifications |
Rubric Design
Analytic Rubric (Preferred)
| Criteria | 1 - Novice | 2 - Developing | 3 - Proficient | 4 - Exemplary |
|---|---|---|---|---|
| Clarity | Unclear, confusing | Somewhat clear | Clear and organized | Exceptionally clear |
| Evidence | No support | Limited support | Relevant support | Compelling, diverse evidence |
| Analysis | Summary only | Some analysis | Good analysis | Deep, nuanced insight |
Holistic Rubric
Single score based on overall quality. Faster but less specific.
Best Practices
- Define 3-5 criteria aligned to learning objectives
- Use observable, specific language (not "good" or "poor")
- Include examples or exemplars for each level
- Share rubrics before the assessment
- Calibrate with other assessors before grading
Feedback Principles
- Timely: Within 24-48 hours or before next similar task
- Specific: "Your thesis statement clearly argues X" (not "good job")
- Actionable: "Try using a clearer topic sentence at paragraph start"
- Kind: Address the work, not the person
- Forward-looking: "For next time, consider..."
Competency-Based Assessment
- Learners advance upon demonstration of mastery
- Multiple assessment opportunities
- No penalty for first attempts
- Focus on skills and application, not time spent
- Personalized learning paths
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.
- 8d ago First seen · 57 lines · 21 tokens per session scan A 61cc848cf670
assessment-design is a skill published in the GitHub repository cosmicstack-labs/mercury-agent-skills (470 stars, last pushed 17d ago), licensed MIT. It adds 21 tokens to every session and 503 once invoked, about $0.0001 per session on Opus 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 2026-09-03.
Other skills, from other repositories
math-olympiad
Solve competition math problems (IMO, Putnam, USAMO, AIME) with adversarial verification that catches the errors self-verification misses. Activates when asked to 'solve this IMO problem', 'prove this olympiad inequality', 'verify this competition proof', 'find a counterexample', 'is this proof correct', or for any…
google-agents-cli-onboarding
Onboarding entrypoint for agents-cli in Agent Platform. It should be used when the user wants to "create a new agent", "develop an agent", "build an agent using ADK", "run the agent locally", "debug agent code", "test an agent", "evaluate an agent", "deploy an agent", "publish an agent", "monitor an agent", or needs…
practice-cognition
A method for testing ideas in practice, learning from the results, and improving the next attempt through repeated cycles.
rust-learner
Learn Rust language features and crate updates. Use when user asks about Rust version changelog, what's new in Rust, crate updates, Cargo.toml dependencies, tokio/serde/axum features, or any Rust ecosystem questions.
81-pipecat
Create your Pipecat skill from official documentation, then learn to improve it throughout the chapter.
35-google-adk-reliable-agents
Create your Google Agent Development Kit skill in one prompt, then learn to improve it throughout the chapter.