Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/Kasempiternal/axiom-v2npx agentmods add skills/kasempiternal/axiom-v2/ax-build-refWrote 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/kasempiternal/axiom-v2/ax-build-ref)<a href="https://agentmods.dev/skills/kasempiternal/axiom-v2/ax-build-ref"><img src="https://agentmods.dev/badge/skills/kasempiternal/axiom-v2/ax-build-ref/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/kasempiternal/axiom-v2/ax-build-ref"><img src="https://agentmods.dev/badge/skills/kasempiternal/axiom-v2/ax-build-ref.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 | $0.00033 | $0.03343 |
| Opus 5 | $0.00016 | $0.01672 |
| Sonnet 5 | $0.00007 | $0.00669 |
| Haiku 4.5 | $0.00003 | $0.00334 |
Grade B, and why
ax-build-ref scanned grade B with 1 finding 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 10d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo xcode-select -s /Applications/Xcode-16.app How it starts
The opening of the file, as written. The whole thing — 470 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Build Reference
Quick Patterns
Find Your Scheme
xcodebuild -list
Show Build Settings
xcodebuild -showBuildSettings -scheme YourScheme
xcodebuild -showBuildSettings -scheme YourScheme | grep FRAMEWORK_SEARCH_PATHS
xcodebuild -showBuildSettings -configuration Debug > debug.txt
xcodebuild -showBuildSettings -configuration Release > release.txt
Build Commands
# Basic build
xcodebuild build -scheme YourScheme
# Build for simulator
xcodebuild build -scheme YourScheme \
-destination 'platform=iOS Simulator,name=iPhone 16'
# Build for device
xcodebuild build -scheme YourScheme \
-destination 'platform=iOS,name=Your iPhone'
# Workspace build (CocoaPods)
xcodebuild -workspace YourApp.xcworkspace -scheme YourScheme build
# Project-only build (no CocoaPods)
xcodebuild -project YourApp.xcodeproj -scheme YourScheme build
# Clean build
xcodebuild clean build -scheme YourScheme
# Verbose output
xcodebuild -verbose build -scheme YourScheme
# Build with timing summary
xcodebuild build -scheme YourScheme -showBuildTimingSummary
# Build for testing (faster, no run)
xcodebuild build-for-testing -scheme YourScheme
xcodebuild test-without-building -scheme YourScheme
# Archive
xcodebuild archive -scheme YourApp \
-archivePath ./build/YourApp.xcarchive
# Build with specific setting override
xcodebuild build -scheme YourScheme \
COMPILATION_CACHE_ENABLE_CACHING=YES
Test Commands
# Run all tests
xcodebuild test -scheme YourScheme \
-destination 'platform=iOS Simulator,name=iPhone 16'
# Run specific test class
xcodebuild test -scheme YourScheme \
-destination 'platform=iOS Simulator,name=iPhone 16' \
-only-testing:YourTests/SpecificTestClass
# Run specific test method
xcodebuild test -scheme YourScheme \
-destination 'platform=iOS Simulator,name=iPhone 16' \
-only-testing:YourTests/SpecificTestClass/testMethodName
Decision Tree
Need to build?
├─ What file type?
│ ├─ .xcworkspace -> xcodebuild -workspace
│ ├─ .xcodeproj -> xcodebuild -project
│ └─ Package.swift -> swift build
├─ What destination?
│ ├─ Simulator -> -destination 'platform=iOS Simulator,name=iPhone 16'
│ ├─ Device -> -destination 'platform=iOS,name=Device Name'
│ └─ macOS -> -destination 'platform=macOS'
├─ What configuration?
│ ├─ Debug -> -configuration Debug (default)
│ └─ Release -> -configuration Release
└─ Need special flags?
├─ Timing -> -showBuildTimingSummary
├─ Verbose -> -verbose
└─ Override setting -> SETTING_NAME=value
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.
- 10d ago First seen · 470 lines · 33 tokens per session scan B 6a9af242d0b1
ax-build-ref is a skill published in the GitHub repository Kasempiternal/axiom-v2 (4 stars, last pushed 6mo ago), licensed MIT. It adds 33 tokens to every session and 3,343 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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