Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add giginet/apple-icon-composer-skill/plugin install icon-composerWrote 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/giginet/apple-icon-composer-skill/compose-app-icon)<a href="https://agentmods.dev/skills/giginet/apple-icon-composer-skill/compose-app-icon"><img src="https://agentmods.dev/badge/skills/giginet/apple-icon-composer-skill/compose-app-icon/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/giginet/apple-icon-composer-skill/compose-app-icon"><img src="https://agentmods.dev/badge/skills/giginet/apple-icon-composer-skill/compose-app-icon.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 | $0.00127 | $0.07049 |
| Opus 5 | $0.00063 | $0.03524 |
| Sonnet 5 | $0.00025 | $0.01410 |
| Haiku 4.5 | $0.00013 | $0.00705 |
Grade A, and why
compose-app-icon 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.
How it starts
The opening of the file, as written. The whole thing — 447 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apple Icon Composer .icon packages
A .icon is a directory (macOS document package) containing a declarative icon.json and an Assets/ folder. This skill authors new packages, edits existing ones in place, and validates them against the bundled JSON Schema. All three workflows share one bundled uv project.
Icon Composer 1.x vs 2.0
The schema covers both generations. Icon Composer 2.0 (Xcode 27) added Liquid Glass controls and a forward-compatibility gate; everything a 1.x document contains still validates.
| Area | Icon Composer 1.x | Icon Composer 2.0 |
|---|---|---|
| Document capability gate | — | features: ["refractivity", "specular-location"] |
| Group blur | blur |
blur-material (blur is ignored by 2.0) |
| Refractivity | — | refractivity: { enabled, strength, depth } |
| Specular placement | — | specular-highlight-placement: automatic | inside | outside |
| Per-appearance shadow / translucency | nested keys | whole-object shadow-specializations / translucency-specializations |
| Specialization slot | appearance |
appearance + idiom + localization |
| RTL mirroring | — | implicit-asset-mirroring, asset-mirroring: { mirrorable } |
Group is required to carry shadow/translucency |
yes | no — omit either when it is specialized or left at its default |
features is a hard gate, not a hint: Icon Composer refuses to open a document listing a feature it does not recognize ("This document uses features from a newer version of Icon Composer"). That is the point — it stops Icon Composer 1.x from silently dropping a 2.0-only effect. So whenever a group carries any refractivity* key, the document must declare features: ["refractivity"], and any specular-highlight-placement* key requires "specular-location". The bundled schema enforces both.
Preflight: confirm uv is installed
Before running any commands, execute which uv. If it exits non-zero (no uv on PATH), stop and report the error to the user — this skill requires uv. Do not fall back to a system python3; the bundled pyproject.toml pins requires-python = ">=3.9" and dependency versions via uv.lock.
What ships with it
7 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.
- 9d ago First seen · 447 lines · 127 tokens per session scan A 4bbceb526cb7
compose-app-icon is a skill published in the GitHub repository giginet/apple-icon-composer-skill (34 stars, last pushed 15d ago), licensed Apache-2.0. It adds 127 tokens to every session and 7,049 once invoked, about $0.0006 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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