What is screen-time-api-engineer?

A development guide for apps that use Apple's Screen Time APIs, which provide access to screen-use controls and activity data. It requires decisions to be checked against Apple's documentation, SDK files, and project evidence.

Use it when implementing permissions, family activity selection, app and activity labels, blocking policies, signing, distribution, or App Store review preparation.

It helps avoid relying on outdated examples or uncertain assumptions about Apple's APIs. It also makes unclear conclusions and supporting evidence explicit.

screen-time-api-engineer — Skill for Claude Code and Codex by Siddhu7007: A development guide for apps that use Apple's Screen…

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.

agentmods

npx agentmods add skills/siddhu7007/screen-time-api-agent-skill/screen-time-api-engineer

Any agent

npx skills add Siddhu7007/screen-time-api-agent-skill --skill screen-time-api-engineer

Clone the repo

git clone --depth 1 https://github.com/Siddhu7007/screen-time-api-agent-skill

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/siddhu7007/screen-time-api-agent-skill/screen-time-api-engineer.svg)](https://agentmods.dev/skills/siddhu7007/screen-time-api-agent-skill/screen-time-api-engineer)

Your own site

<a href="https://agentmods.dev/skills/siddhu7007/screen-time-api-agent-skill/screen-time-api-engineer"><img src="https://agentmods.dev/badge/skills/siddhu7007/screen-time-api-agent-skill/screen-time-api-engineer.svg" alt="Measured on agentmods" height="20"></a>

Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 943 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

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.

Model	Per session	Once invoked
Fable 5	$0.00079	$0.00943
Opus 5	$0.00039	$0.00472
Sonnet 5	$0.00016	$0.00189
Haiku 4.5	$0.00008	$0.00094

Measured 5d ago against content hash 98bad1764f9c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

screen-time-api-engineer 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 5d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/check_required_sections.sh, scripts/check_source_coverage.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/screen-time-api-engineer/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Screen Time API Engineer

Use this skill to implement and harden Screen Time API apps with a docs-first evidence model.

Rules

Use this evidence order for decisions:
1. Canonical Apple docs and WWDC
2. Local SDK interfaces/headers
3. Project-observed implementations (Project Alpha/Project Beta)
4. Field notes (forums/medium)
If sources conflict, prefer canonical + SDK behavior.
Mark uncertain conclusions as inference and include a caveat.

Quick Start Workflow

Identify user goal category.
Open matching references from references/guides.
Cross-check critical API claims in references/evidence.
If implementation quality or regressions matter, use references/rundowns.
Produce output with explicit source/confidence labeling.

Goal to Reference Map

Entitlements, signing, distribution approval:
- references/guides/02-authorization-setup.md
- references/guides/19-release-and-app-review-checklist.md
Family activity picker and token handling:
- references/guides/03-familycontrols-selection-and-token-model.md
- references/guides/04-displaying-activity-labels-and-real-app-icons.md
Shield policy and store behavior:
- references/guides/05-managedsettings-enforcement-patterns.md
- references/guides/06-web-blocking-and-webdomain-policy.md
Custom shield UI/action:
- references/guides/07-managedsettingsui-custom-shield-systems.md
- references/guides/08-shield-actions-and-response-strategies.md
Scheduling and monitor callbacks:
- references/guides/09-deviceactivity-scheduling-thresholds-and-errors.md
- references/guides/10-deviceactivity-monitor-extension-playbook.md
Usage analytics reporting:
- references/guides/11-deviceactivity-report-analytics-architecture.md
Web usage control/reporting via ScreenTime framework:
- references/guides/12-screentime-framework-web-usage-reporting.md
Onboarding and permission UX:
- references/guides/13-onboarding-and-permission-ui-blueprints.md
End-to-end implementation reference:
- references/guides/14-app-and-website-blocking-reference-implementation.md
Project deep dives and comparative hardening:
- references/guides/15-project-alpha-implementation-analysis.md
- references/guides/16-project-beta-implementation-analysis.md
- references/rundowns/12-cross-project-rundown.md
Bug prevention, testing, and preflight:
- references/guides/17-hardening-checklist-bug-prevention.md
- references/guides/18-testing-matrix-device-only-edge-cases.md
- references/guides/21-preflight-rundown.md

Read the full file on GitHub · 80 lines

Files

What ships with it

36 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.

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.

5d ago First seen · 80 lines · 79 tokens per session scan A 98bad1764f9c

Subscribe to this mod's changes

screen-time-api-engineer is a skill published in the GitHub repository Siddhu7007/screen-time-api-agent-skill (24 stars, last pushed 6mo ago), licensed MIT. It adds 79 tokens to every session and 943 once invoked, about $0.0004 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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