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.
npx skills add Kasempiternal/axiom-v2 --skill ax-buildgit clone --depth 1 https://github.com/Kasempiternal/axiom-v2Wrote 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)<a href="https://agentmods.dev/skills/kasempiternal/axiom-v2/ax-build"><img src="https://agentmods.dev/badge/skills/kasempiternal/axiom-v2/ax-build/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"><img src="https://agentmods.dev/badge/skills/kasempiternal/axiom-v2/ax-build.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 | $0.00026 | $0.04187 |
| Opus 5 | $0.00013 | $0.02093 |
| Sonnet 5 | $0.00005 | $0.00837 |
| Haiku 4.5 | $0.00003 | $0.00419 |
Grade C, and why
ax-build scanned grade C 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf ~/Library/Developer/Xcode/DerivedData/* How it starts
The opening of the file, as written. The whole thing — 530 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Build & Fix
Quick Patterns
Environment-First Diagnostics (Run BEFORE Debugging Code)
80% of mysterious Xcode issues are environment problems, not code bugs.
# 1. Check for zombie processes
ps aux | grep -E "xcodebuild|Simulator" | grep -v grep
# 2. Check Derived Data size (>10GB = stale)
du -sh ~/Library/Developer/Xcode/DerivedData
# 3. Check simulator states
xcrun simctl list devices | grep -E "Booted|Booting|Shutting Down"
Interpretation:
- 0 processes + small Derived Data + no stuck sims = environment clean, investigate code
- 10+ processes OR >10GB OR stuck simulators = environment problem, clean first
- Stale code executing OR intermittent failures = clean Derived Data regardless of size
Clean Everything (Stale Builds / "No such module")
xcodebuild clean -scheme YourScheme
rm -rf ~/Library/Developer/Xcode/DerivedData/*
rm -rf .build/ build/
xcodebuild build -scheme YourScheme \
-destination 'platform=iOS Simulator,name=iPhone 16'
SPM Package Not Found
rm -rf ~/Library/Developer/Xcode/DerivedData
rm -rf ~/Library/Caches/org.swift.swiftpm
xcodebuild -resolvePackageDependencies
xcodebuild clean build -scheme YourScheme
CocoaPods Clean Reinstall
rm -rf Pods/
rm Podfile.lock
pod install
open YourApp.xcworkspace # Always workspace, never .xcodeproj
Simulator Recovery
xcrun simctl shutdown all
xcrun simctl list devices
# If still stuck:
xcrun simctl erase <device-uuid>
# Nuclear option:
killall -9 Simulator
Kill Zombie Processes
killall -9 xcodebuild
ps aux | grep xcodebuild | grep -v grep
Isolate Failing Test
xcodebuild test -scheme YourScheme \
-destination 'platform=iOS Simulator,name=iPhone 16' \
-only-testing:YourTests/SpecificTestClass
Crash Log Analysis
# Recent crashes
ls -lt ~/Library/Logs/DiagnosticReports/*.crash | head -5
# Symbolicate address
atos -o YourApp.app.dSYM/Contents/Resources/DWARF/YourApp \
-arch arm64 0x<address>
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 · 530 lines · 26 tokens per session scan C 42cb6fd4449b
ax-build is a skill published in the GitHub repository Kasempiternal/axiom-v2 (4 stars, last pushed 6mo ago), licensed MIT. It adds 26 tokens to every session and 4,187 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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