axiom-vision
Use when implementing ANY computer vision feature — image analysis, pose detection, person segmentation, subject lifting, text recognition, barcode scanning.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-vision- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads axiom-vision automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Computer Vision
You MUST use this skill for ANY computer vision work using the Vision framework.
Quick Reference
| Symptom / Task | Reference |
|---|---|
| Subject segmentation, lifting | See skills/vision-framework.md |
| Hand/body pose detection | See skills/vision-framework.md |
| Text recognition (OCR) | See skills/vision-framework.md |
| Barcode/QR code detection | See skills/vision-framework.md |
| Document scanning | See skills/vision-framework.md |
| DataScannerViewController | See skills/vision-framework.md |
| Structured document extraction (iOS 26+) | See skills/vision-framework.md |
| Isolate object excluding hand | See skills/vision-framework.md |
Tap-to-segment any object OS27 | See skills/vision-ref.md |
Vision on watchOS watchOS27 | See skills/vision-ref.md |
Vision tools for Foundation Models (BarcodeReaderTool, OCRTool) OS27 | See skills/vision-ref.md |
| Vision framework API reference | See skills/vision-ref.md |
| Visual Intelligence integration (iOS 26+, iPadOS27/macOS27) | See skills/vision-ref.md |
Sensitive content classification (nudity/gore/violence), categorized via detectedTypes (OS27) | See skills/vision-ref.md |
Group/cluster faces into people across a library, video highlights/key frames (OS27) | Use axiom-media (skills/media-intelligence.md) instead — MediaIntelligence clusters identities; Vision detects faces in one image |
| Subject not detected | See skills/vision-diag.md |
| Hand/body pose missing landmarks | See skills/vision-diag.md |
| Low confidence observations | See skills/vision-diag.md |
| UI freezing during processing | See skills/vision-diag.md |
| Coordinate conversion bugs | See skills/vision-diag.md |
| Text not recognized / wrong chars | See skills/vision-diag.md |
| Barcode not detected | See skills/vision-diag.md |
| DataScanner blank / no items | See skills/vision-diag.md |
| Document edges not detected | See skills/vision-diag.md |
Decision Tree
digraph vision {
start [label="Computer vision task" shape=ellipse];
what [label="What do you need?" shape=diamond];
start -> what;
what -> "skills/vision-framework.md" [label="implement feature"];
what -> "skills/vision-ref.md" [label="API reference"];
what -> "skills/vision-ref.md" [label="Visual Intelligence"];
what -> "skills/vision-ref.md" [label="tap-to-segment / watchOS / FM tools (27)"];
what -> "skills/vision-diag.md" [label="something broken"];
}
- Implementing (pose, segmentation, OCR, barcodes, documents, live scanning)? →
skills/vision-framework.md - Visual Intelligence system integration (camera/screenshot search; iOS 26+, iPadOS27/macOS27)? →
skills/vision-ref.md(Visual Intelligence section) - Tap-to-segment, Vision on watchOS, or Vision tools for Foundation Models (27 cycle)? →
skills/vision-ref.md - Need API reference / code examples? →
skills/vision-ref.md - Debugging issues (detection failures, confidence, coordinates)? →
skills/vision-diag.md
Critical Patterns
Implementation (skills/vision-framework.md):
- Decision tree for choosing the right Vision API
- Subject segmentation with VisionKit
- Isolating objects while excluding hands (combining APIs)
- Hand/body pose detection (21/19 landmarks)
- Text recognition (fast vs accurate modes)
- Barcode detection with symbology selection
- Document scanning and structured extraction (iOS 26+)
- Live scanning with DataScannerViewController
- CoreImage HDR compositing
Diagnostics (skills/vision-diag.md):
- Subject detection failures (edge of frame, lighting)
- Landmark tracking issues (confidence thresholds)
- Performance optimization (frame skipping, downscaling)
- Coordinate conversion (lower-left vs top-left origin)
- Text recognition failures (language, contrast)
- Barcode detection issues (symbology, size, glare)
- DataScanner troubleshooting (availability, data types)
Anti-Rationalization
| Thought | Reality |
|---|---|
| "Vision framework is just a request/handler pattern" | Vision has coordinate conversion, confidence thresholds, and performance gotchas. vision-framework.md covers them. |
| "I'll handle text recognition without the skill" | VNRecognizeTextRequest has fast/accurate modes and language-specific settings. vision-framework.md has the patterns. |
| "Subject segmentation is straightforward" | Instance masks have HDR compositing and hand-exclusion patterns. vision-framework.md covers complex scenarios. |
| "Visual Intelligence is just the camera API" | Visual Intelligence is a system-level feature requiring IntentValueQuery and SemanticContentDescriptor. vision-ref.md has the integration section. |
| "I'll just process on the main thread" | Vision blocks UI on older devices. Users on iPhone 12 will experience frozen app. 15 min to add background queue. |
Example Invocations
User: "How do I detect hand pose in an image?"
→ See skills/vision-framework.md
User: "Isolate a subject but exclude the user's hands"
→ See skills/vision-framework.md
User: "How do I read text from an image?"
→ See skills/vision-framework.md
User: "Scan QR codes with the camera"
→ See skills/vision-framework.md
User: "Subject detection isn't working"
→ See skills/vision-diag.md
User: "Text recognition returns wrong characters"
→ See skills/vision-diag.md
User: "Show me VNDetectHumanBodyPoseRequest examples"
→ See skills/vision-ref.md
User: "How do I make my app work with Visual Intelligence?"
→ See skills/vision-ref.md
User: "Let users tap an object in a photo to cut it out"
→ See skills/vision-ref.md (Iterative Segmentation)
User: "Can I use Vision in my watchOS app?"
→ See skills/vision-ref.md (Vision on watchOS)
User: "RecognizeDocumentsRequest API reference"
→ See skills/vision-ref.md
User: "Group faces into people across my library" / "cluster faces on-device into persons"
→ Use axiom-media (skills/media-intelligence.md) — identity clustering across assets, not per-image detection
FAQ
What does the axiom-vision skill do?
Use when implementing ANY computer vision feature — image analysis, pose detection, person segmentation, subject lifting, text recognition, barcode scanning.
How do I install axiom-vision?
Run npx skills add https://github.com/charleswiltgen/axiom --skill axiom-vision in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/axiom-vision/ (personal) or .claude/skills/axiom-vision/ (project).
Which AI agents can use axiom-vision?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is axiom-vision safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains axiom-vision?
It is published by charleswiltgen in charleswiltgen/axiom. It has 1,776 recorded installs.
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