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 TalissonVitorino/kmp-ios-skills --skill activitykitgit clone --depth 1 https://github.com/TalissonVitorino/kmp-ios-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/talissonvitorino/kmp-ios-skills/activitykit)<a href="https://agentmods.dev/skills/talissonvitorino/kmp-ios-skills/activitykit"><img src="https://agentmods.dev/badge/skills/talissonvitorino/kmp-ios-skills/activitykit/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/talissonvitorino/kmp-ios-skills/activitykit"><img src="https://agentmods.dev/badge/skills/talissonvitorino/kmp-ios-skills/activitykit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 4 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Prompt Injection · line 47 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- medium Rogue Agent · line 42 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 47 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 259 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 | $0.00168 | $0.03644 |
| Opus 5 | $0.00084 | $0.01822 |
| Sonnet 5 | $0.00034 | $0.00729 |
| Haiku 4.5 | $0.00017 | $0.00364 |
Grade A, and why
activitykit 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.
How it starts
The opening of the file, as written. The whole thing — 270 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ActivityKit — Live Activities & Dynamic Island (iOS)
Real-time, glanceable state (delivery, ride, order, workout, transfer) on the Lock Screen, in the Dynamic Island, StandBy, the Apple Watch Smart Stack, the Mac menu bar, and the CarPlay Dashboard. Grounded in Apple's ActivityKit + WidgetKit. iOS 16.1+; targets the iOS 26 era.
- Widget/timeline counterpart:
widgetkit(Home/Lock Screen widgets, timelines, App Groups). Live Activity UI lives in the widget extension and shares the App Group with the app. - Server-side push delivery:
push-notifications(APNs auth, topics). Interactive buttons in an activity:app-intents(Button(intent:)/Toggle(intent:), no app launch). - Shared money formatting in the UI:
swift-formatstyle; if the model comes from KMP shared code, keep it a value type crossing the boundary perkmp-ios-integration.
Contents
- When it fits (and when not)
- Project setup
- Data model: ActivityAttributes + ContentState
- Lifecycle: request / update / end
- Observing state & tokens
- UI: ActivityConfiguration, Lock Screen, Dynamic Island
- Push-to-update (APNs)
- Apple Watch / CarPlay
- Correctness checklist
- References:
references/push.md(APNs payloads & channels),references/dynamic-island.md(region layout rules)
When it fits (and when not)
- Fits: a single, live, user-initiated event with a foreseeable end — order/delivery tracking, ride status, a running timer, a transfer clearing, a live score. One activity per real-world event.
- Doesn't fit: general marketing, always-on dashboards, or content with no end state. The system limits how many activities an app runs and how often they update; abuse gets throttled.
- Budget: combined
ContentState+ActivityAttributespayload must stay ≤ 4 KB. Keep the model tiny — ids and small scalars, not blobs or images. - Users can disable Live Activities per-app in Settings — always gate on authorization.
What ships with it
2 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.
- 12d ago First seen · 270 lines · 168 tokens per session scan A f49dce9d5187
activitykit is a skill published in the GitHub repository TalissonVitorino/kmp-ios-skills (12 stars, last pushed 17d ago), licensed MIT. It adds 168 tokens to every session and 3,644 once invoked, about $0.0008 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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