apple-image-representation-workflow

A guide for reading, writing, inspecting, and converting images across Apple image frameworks and file formats.

In plain words
What is it for?
Use it for image decoding and encoding, metadata, thumbnails, multi-frame files, orientation and scale, and conversion among UIKit, AppKit, Core Graphics, Core Image, and Core Video types.
Why use it?
It prevents file data, displayed pixels, metadata, thumbnails, and image representations from being treated as the same thing.

Skill for Claude CodeCodex

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/gaelic-ghost/socket/apple-image-representation-workflow
Any agent
npx skills add gaelic-ghost/socket --skill apple-image-representation-workflow
Clone the repo
git clone --depth 1 https://github.com/gaelic-ghost/socket

Made for: Claude Code, Codex.

Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,263 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.

ModelPer sessionOnce invoked
Fable 5 $0.00081 $0.01263
Opus 5 $0.00041 $0.00632
Sonnet 5 $0.00016 $0.00253
Haiku 4.5 $0.00008 $0.00126

Measured 2d ago against content hash 70c388654cf1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

apple-image-representation-workflow 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 2d 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.

plugins/apple-dev-skills/skills/apple-image-representation-workflow/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Apple Image Representation Workflow

Purpose

Guide image source, destination, representation, and conversion work without flattening distinct Apple image types into a generic wrapper. Keep file encoding, rendered pixels, processing recipes, platform display containers, metadata, and auxiliary images visibly separate.

When To Use

  • Use for Image I/O sources and destinations, metadata, thumbnails, incremental loading, multi-frame images, CGImage, NSImage, NSImageRep, NSBitmapImageRep, UIImage, and representation conversion.
  • Recommend core-image-processing-workflow when filters, compositing, RAW development, custom kernels, or rendering are primary.
  • Recommend the Vision workflow when the requested outcome is recognition or analysis rather than representation ownership.

Single-Path Workflow

  1. Classify the request:
    • source inspection or decoding
    • incremental loading or thumbnailing
    • metadata or auxiliary data
    • destination encoding or multi-frame output
    • Core Graphics raster ownership
    • AppKit representation or drawing
    • UIKit image display ownership
    • conversion or repair
  2. Apply the Apple docs gate:
    • read current Image I/O, Core Graphics, AppKit, or UIKit documentation first
    • state the documented behavior relied on
    • check API, image-format, auxiliary-data, and platform availability before promising a decode, encode, or representation path
    • apply ../../shared/references/apple-image-type-ownership.md
    • use references/image-io-decoding-encoding-and-metadata.md for source and destination work
    • use references/apple-image-representations-and-bridging.md for type selection and conversion
  3. Preserve source meaning:
    • inspect type, frame count, dimensions, properties, orientation, color profile, alpha, dynamic range, and auxiliary data before conversion
    • choose decode-time thumbnailing or incremental loading when the workload requires it
    • identify whether metadata and original encoded bytes must survive
  4. Choose the representation:
    • CGImage for concrete raster pixels and Core Graphics drawing
    • CIImage for a lazy processing graph
    • NSImage and NSImageRep for macOS display-oriented multi-representation behavior
    • UIImage for UIKit display semantics including scale and orientation
    • CVPixelBuffer for frame-oriented media and hardware interop
  5. Encode deliberately:
    • choose destination type, frame count, properties, metadata policy, orientation policy, color profile, compression, and auxiliary-data policy
    • add every image or frame
    • require successful CGImageDestinationFinalize before claiming output exists
  6. Return one recommendation with source facts, chosen types, conversion losses, decode/encode plan, memory and cancellation policy, diagnostics, and validation.

Read the full file on GitHub · 93 lines

Files

What ships with it

4 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.

  1. 2d ago First seen · 93 lines · 81 tokens per session scan A 70c388654cf1

Subscribe to this mod's changes

apple-image-representation-workflow is a skill published in the GitHub repository gaelic-ghost/socket (7 stars, last pushed 6d ago), licensed Apache-2.0. It adds 81 tokens to every session and 1,263 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 2026-08-31.

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