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 Stijnman/grok-custom-skills --skill voice-agent-designgit clone --depth 1 https://github.com/Stijnman/grok-custom-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/stijnman/grok-custom-skills/voice-agent-design)<a href="https://agentmods.dev/skills/stijnman/grok-custom-skills/voice-agent-design"><img src="https://agentmods.dev/badge/skills/stijnman/grok-custom-skills/voice-agent-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/stijnman/grok-custom-skills/voice-agent-design"><img src="https://agentmods.dev/badge/skills/stijnman/grok-custom-skills/voice-agent-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00045 | $0.00411 |
| Opus 5 | $0.00023 | $0.00205 |
| Sonnet 5 | $0.00009 | $0.00082 |
| Haiku 4.5 | $0.00005 | $0.00041 |
Grade A, and why
voice-agent-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.
What it actually says
Voice Agent Design
Purpose
Design a voice-agent specification that is concise, understandable, and safe for callers. The skill is vendor-neutral and does not assume a specific telephony or model provider.
Workflow
- Define the agent’s purpose, audience, supported tasks, and explicit exclusions.
- Draft a short conversation flow: greeting, disclosure where appropriate, intent capture, information gathering, resolution, confirmation, and close.
- Identify sensitive data, recording notices, retention rules, and a path to a human representative.
- List every external action, such as booking, messaging, payment, or account change, and require explicit confirmation immediately before it occurs.
- Define failure handling for uncertainty, silence, interruption, bad transfer, and urgent or sensitive topics.
- Write a test plan covering normal, ambiguous, adversarial, and escalation calls.
Safety boundaries
Obtain explicit consent before voice cloning a real person. Do not imitate a person without authorization, conceal an AI identity where disclosure is required, or make promises the system cannot verify. Keep recordings and transcripts to the minimum authorized scope.
Error handling
| Situation | Response |
|---|---|
| Intent remains unclear | Ask one concise clarification, then offer human handoff. |
| Caller requests a consequential action | Restate scope and obtain confirmation before acting. |
| Sensitive or emergency topic arises | Follow the approved escalation path; do not improvise advice. |
| Tool or knowledge source fails | State the limitation, avoid guessing, and offer a safe alternative. |
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 · 39 lines · 45 tokens per session scan A 56a610ba390e
voice-agent-design is a skill published in the GitHub repository Stijnman/grok-custom-skills (9 stars, last pushed yesterday), licensed MIT. It adds 45 tokens to every session and 411 once invoked, about $0.0002 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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