axiom-mapkit

axiom-mapkit is a skill for Claude Code, Codex from ComeOnOliver/skillshub. It costs 41 tokens per session (4,444 once invoked), scanned A, original, MIT.

A pattern guide for building maps and location features with Apple MapKit in iOS apps.

In plain words
What is it for?
Use it when adding maps, pins, search, directions, clustering, or custom map views, and when deciding between SwiftUI Map and MKMapView.
Why use it?
It highlights design choices and common mistakes that can cause UI freezes, map update loops, missing annotations, or poor performance.

Skill for Claude CodeCodex

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

Good fit Use it when adding maps, pins, search, directions, clustering, or custom map views, and when deciding between SwiftUI Map and MKMapView.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/comeonoliver/skillshub/axiom-mapkit
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 ComeOnOliver/skillshub --skill axiom-mapkit
Clone the repo
git clone --depth 1 https://github.com/ComeOnOliver/skillshub

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 axiom-mapkit

README.md
[![agentmods](https://agentmods.dev/badge/skills/comeonoliver/skillshub/axiom-mapkit/github.svg)](https://agentmods.dev/skills/comeonoliver/skillshub/axiom-mapkit)
Your own site
<a href="https://agentmods.dev/skills/comeonoliver/skillshub/axiom-mapkit"><img src="https://agentmods.dev/badge/skills/comeonoliver/skillshub/axiom-mapkit/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 axiom-mapkit

Your own site · 80×15
<a href="https://agentmods.dev/skills/comeonoliver/skillshub/axiom-mapkit"><img src="https://agentmods.dev/badge/skills/comeonoliver/skillshub/axiom-mapkit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,444 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 $0.00041 $0.04444
Opus 5 $0.00020 $0.02222
Sonnet 5 $0.00008 $0.00889
Haiku 4.5 $0.00004 $0.00444

Measured 9d ago against content hash d539e49db75b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

axiom-mapkit 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.

skills/CharlesWiltgen/Axiom/axiom-mapkit/SKILL.md · 556 lines

How it starts

The opening of the file, as written. The whole thing — 556 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MapKit Patterns

MapKit patterns and anti-patterns for iOS apps. Prevents common mistakes: using MKMapView when SwiftUI Map suffices, annotations in view bodies, setRegion loops, and performance issues with large annotation counts.

When to Use

  • Adding a map to your iOS app
  • Displaying annotations, markers, or custom pins
  • Implementing search (address, POI, autocomplete)
  • Adding directions/routing to a map
  • Debugging map display issues (annotations not showing, region jumping)
  • Optimizing map performance with many annotations
  • Deciding between SwiftUI Map and MKMapView
  • axiom-mapkit-ref — Complete API reference
  • axiom-mapkit-diag — Symptom-based troubleshooting
  • axiom-core-location — Location authorization and monitoring

Part 1: Anti-Patterns (with Time Costs)

Anti-Pattern Time Cost Fix
Using MKMapView when SwiftUI Map suffices 2-4 hours UIViewRepresentable boilerplate Use SwiftUI Map {} for standard map features (iOS 17+)
Creating annotations in SwiftUI view body UI freeze with 100+ items, view recreation on every update Move annotations to model, use @State or @Observable
No annotation view reuse (MKMapView) Memory spikes, scroll lag with 500+ annotations dequeueReusableAnnotationView(withIdentifier:for:)
setRegion in updateUIView without guard Infinite loop — region change triggers update, update sets region Guard with mapView.region != region or use flag
Ignoring MapCameraPosition (SwiftUI) Can't programmatically control camera, broken "center on user" Bind position parameter to @State var cameraPosition
Synchronous geocoding on main thread UI freeze for 1-3 seconds per geocode Use CLGeocoder().geocodeAddressString with async/await
Not filtering annotations to visible region Loading all 10K annotations at once Use mapView.annotations(in:) or fetch by visible region
Ignoring resultTypes in MKLocalSearch Irrelevant results, slow search Set .resultTypes = [.pointOfInterest] or .address to filter

Read the full file on GitHub · 556 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. 9d ago First seen · 556 lines · 41 tokens per session scan A d539e49db75b

Subscribe to this mod's changes

axiom-mapkit is a skill published in the GitHub repository ComeOnOliver/skillshub (63 stars, last pushed 2mo ago), licensed MIT. It adds 41 tokens to every session and 4,444 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.