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 tuanductran/hr-skills --skill hr-system-designgit clone --depth 1 https://github.com/tuanductran/hr-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/tuanductran/hr-skills/hr-system-design)<a href="https://agentmods.dev/skills/tuanductran/hr-skills/hr-system-design"><img src="https://agentmods.dev/badge/skills/tuanductran/hr-skills/hr-system-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/tuanductran/hr-skills/hr-system-design"><img src="https://agentmods.dev/badge/skills/tuanductran/hr-skills/hr-system-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 | $0.00062 | $0.00721 |
| Opus 5 | $0.00031 | $0.00360 |
| Sonnet 5 | $0.00012 | $0.00144 |
| Haiku 4.5 | $0.00006 | $0.00072 |
Grade A, and why
hr-system-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 9d 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 — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HR system design hiring
Helps HR and technical hiring teams design, run, and calibrate system design interviews used to assess senior software engineering candidates.
Supported tasks
- Designing system design interview prompts calibrated to seniority level
- Building evaluation rubrics for system design interviews
- Creating interviewer training materials for running system design rounds
- Drafting sample "good" and "weak" answer patterns for calibration
- Building a glossary of system design concepts for non-technical recruiters
- Designing a structured interview loop combining system design with other rounds
- Creating debrief templates for system design interview feedback
- Drafting take-home system design exercise briefs
- Building calibration sessions to align interviewers on scoring standards
- Creating candidate-facing guidance on what to expect in a system design interview
- Designing rubrics that separate design skill from communication skill
- Auditing past system design interview data for scoring consistency
Key prompts
Interview design
- "Create a system design interview prompt appropriate for a [seniority level] engineer."
- "Draft a 45-minute system design interview structure with time allocations per phase."
- "Design a system design prompt focused on [system type, e.g., URL shortener, chat app, rate limiter]."
- "Create a take-home system design exercise brief with clear deliverable expectations."
- "Draft candidate-facing guidance explaining what to expect in a system design interview."
Evaluation and calibration
- "Build an evaluation rubric for a system design interview covering scalability, trade-offs, and communication."
- "Draft example 'strong', 'adequate', and 'weak' answer patterns for a given system design prompt."
- "Create a calibration session agenda to align interviewers on scoring standards."
- "Design a rubric section specifically evaluating how a candidate communicates trade-offs."
- "Draft a debrief template for capturing system design interview feedback."
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.
- 9d ago First seen · 67 lines · 62 tokens per session scan A f3f8dcfd341c
hr-system-design is a skill published in the GitHub repository tuanductran/hr-skills (58 stars, last pushed today), licensed MIT. It adds 62 tokens to every session and 721 once invoked, about $0.0003 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.
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