Borrowing it
Nothing to install: this file belongs to Iron-Ham/XcodePreviews. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Iron-Ham/XcodePreviews/main/.codex/skills/xcode-preview-capture/SKILL.mdgit clone --depth 1 https://github.com/Iron-Ham/XcodePreviewsWrote 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/iron-ham/xcodepreviews/xcode-preview-capture)<a href="https://agentmods.dev/skills/iron-ham/xcodepreviews/xcode-preview-capture"><img src="https://agentmods.dev/badge/skills/iron-ham/xcodepreviews/xcode-preview-capture/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/iron-ham/xcodepreviews/xcode-preview-capture"><img src="https://agentmods.dev/badge/skills/iron-ham/xcodepreviews/xcode-preview-capture.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00041 | $0.00362 |
| Opus 5.5 | $0.00016 | $0.00145 |
| Sonnet 5.5 | $0.00008 | $0.00072 |
| Haiku 4.5 | $0.00004 | $0.00036 |
Grade A, and why
xcode-preview-capture scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Xcode Preview Capture (Codex)
Use this skill to build SwiftUI previews and inspect screenshots.
Prerequisites
- Xcode + iOS Simulator installed
- Swift toolchain (preview-tool auto-builds on first run)
PREVIEW_BUILD_PATHset to this repository root- Example:
export PREVIEW_BUILD_PATH=/absolute/path/to/XcodePreviews
- Example:
Primary Command
Use the unified entry point first:
"${PREVIEW_BUILD_PATH}"/scripts/preview \
"<path-to-file.swift>" \
--output /tmp/preview.png
The script auto-detects:
- Xcode project with
#Preview-> dynamic target injection - Swift Package -> SPM preview workflow
- Standalone Swift file -> minimal host build
Capture Current Simulator
"${PREVIEW_BUILD_PATH}"/scripts/preview \
--capture \
--output /tmp/preview.png
Workflow
- Run
scripts/previewwith the requested file or--capture. - Confirm the output path exists.
- Open
/tmp/preview*.pngand analyze the rendered UI. - Report structure, styling, and visible issues (alignment, clipping, contrast, etc.).
Troubleshooting
- No simulator booted: run
sim-manager.sh boot "iPhone 17 Pro". - Build failure: surface the error and suggest targeted fixes.
- Wrong project detected: pass
--projector--workspaceexplicitly.
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.
- 1mo ago First seen · 52 lines · 41 tokens per session scan A 80abf5aa7276
xcode-preview-capture is a skill published in the GitHub repository Iron-Ham/XcodePreviews (152 stars, last pushed 3mo ago), licensed MIT. It adds 41 tokens to every session and 362 once invoked, about $0.0002 per session on Opus 5.5. 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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