ux-safety-privacy

ux-safety-privacy is a skill for Claude Code, Codex from parhamb/design-skills. It costs 53 tokens per session (902 once invoked), scanned A, original, MIT.

Guidance for designing and reviewing security- and privacy-sensitive parts of an app, such as sign-in protection, permissions, personal data, and device access.

In plain words
What is it for?
Use it when working on biometric sign-in, passkeys, two-factor authentication, permission prompts, data protection, privacy-policy access, notifications, or multi-device settings.
Why use it?
It helps make security requests understandable and prevents privacy controls from being hidden or poorly timed. It also checks that users can recover access and manage signed-in devices.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when working on biometric sign-in, passkeys, two-factor authentication, permission prompts, data protection, privacy-policy access, notifications, or multi-device settings.

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Install with agentmods
npx agentmods add skills/parhamb/design-skills/ux-safety-privacy
Install

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.

Any agent
npx skills add parhamb/design-skills --skill ux-safety-privacy
Clone the repo
git clone --depth 1 https://github.com/parhamb/design-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for ux-safety-privacy

README.md
[![agentmods](https://agentmods.dev/badge/skills/parhamb/design-skills/ux-safety-privacy/github.svg)](https://agentmods.dev/skills/parhamb/design-skills/ux-safety-privacy)
Your own site
<a href="https://agentmods.dev/skills/parhamb/design-skills/ux-safety-privacy"><img src="https://agentmods.dev/badge/skills/parhamb/design-skills/ux-safety-privacy/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.

agentmods 80×15 button for ux-safety-privacy

Your own site · 80×15
<a href="https://agentmods.dev/skills/parhamb/design-skills/ux-safety-privacy"><img src="https://agentmods.dev/badge/skills/parhamb/design-skills/ux-safety-privacy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 902 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00053 $0.00902
Opus 5 $0.00026 $0.00451
Sonnet 5 $0.00011 $0.00180
Haiku 4.5 $0.00005 $0.00090

Measured 12d ago against content hash 01c7527772c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ux-safety-privacy 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 12d 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.

ux-safety-privacy/SKILL.md · 95 lines

How it starts

The opening of the file, as written. The whole thing — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Safety and Privacy UX

Privacy is a user right. Security is a promise. Both must be designed for explicitly — users should not have to choose between convenience and protection.


Checklist

Item Guidance
Biometric authentication Face ID and fingerprint are available for app re-entry and sensitive actions.
Storage permission prompt Asked at the moment of use, not on launch. Explains why access is needed.
Location permission prompt Request "While Using" first. Upgrade to "Always" only when strictly necessary.
Permissions listed All required permissions are explained before the system dialog appears.
Data protection Data is encrypted at rest and in transit. Sensitive fields are masked.
Multi-device management User can view all signed-in devices and revoke access remotely from Settings.
Notification management Per-type notification toggles (transactional, promotional, security). See ux-notifications.
Two-factor authentication TOTP (authenticator app) available with SMS as fallback and backup codes for recovery.
Privacy policy link Accessible from Settings > About and during account creation. A link, not a buried PDF.
GDPR compliance Data export, data deletion, and consent management are implemented.
Analytics disclosure Analytics providers are listed in the privacy policy.

Permission Best Practices

Ask for permissions in context, not on launch. Requesting camera access when the user first opens the app feels invasive. Asking when the user taps the camera icon feels natural and logical.

Before the system permission dialog appears, show a pre-permission screen that explains what you are asking for and why. This dramatically improves the acceptance rate and reduces the chance the user denies and never comes back.

If a user denies a permission, always provide a recovery path. Show a message like "Enable in Settings > [App] > Camera" rather than silently disabling the feature.

Read the full file on GitHub · 95 lines

Changes

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.

  1. 12d ago First seen · 95 lines · 53 tokens per session scan A 01c7527772c0

Subscribe to this mod's changes

ux-safety-privacy is a skill published in the GitHub repository parhamb/design-skills (23 stars, last pushed 2mo ago), licensed MIT. It adds 53 tokens to every session and 902 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 2026-08-30.

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