Battle-tested skills, agents, and tools for modern Apple OS development — Swift 6, SwiftUI, Liquid Glass, Apple Intelligence, and more. Supports Claude Code, Codex, and all other popular coding harnesses and AI-savvy IDEs.
> /plugin marketplace add charleswiltgen/axiom> /plugin install axiom@axiom-marketplace
Repo: charleswiltgen/axiom
What's inside
Battle-tested skills, agents, and tools for modern Apple OS development — Swift 6, SwiftUI, Liquid Glass, Apple Intelligence, and more. Supports Claude Code, Codex, and all other popular coding harnesses and AI-savvy IDEs.
Axiom gives AI coding assistants deep Apple OS development expertise — the kind that prevents data loss from bad migrations, catches memory leaks before users complain, and stops you from spending 30 minutes debugging a zombie xcodebuild process.
.ips, MetricKit, and Apple's legacy .crash text crashes, with automatic dSYM discovery and pattern categorizationEvery discipline skill is TDD-tested against real developer pressure scenarios. Learn more about quality.
OS 27 in progress. Axiom is on a 27.x beta that tracks Apple's OS 27 developer betas — OS-27 coverage lands continuously through the beta season. Guidance for OS 26 and earlier stays stable.
/plugin marketplace add CharlesWiltgen/Axiom
Then search for "axiom" in the /plugin menu and install.
See the MCP setup guide.
pi install git:github.com/CharlesWiltgen/Axiom
One command installs the skills plus the /axiom-* commands and hooks. See the Pi setup guide.
See the Xcode integration guide.
Skills activate automatically based on your questions. Just ask:
"I'm getting BUILD FAILED in Xcode"
"How do I fix Swift 6 concurrency errors?"
"My app has memory leaks"
"I need to add a database column safely"
"Show me what my app is logging"
"Symbolicate this crash file"
You can also use commands directly:
/axiom:console # Capture simulator console output
/axiom:analyze-crash # Parse and triage .ips, MetricKit, or .crash reports
/axiom:fix-build # Diagnose build failures
/axiom:audit memory # Scan for memory leaks
/axiom:audit concurrency # Check for data races
/axiom:health-check # Run all relevant auditors
Full documentation, skill catalog, and guides at charleswiltgen.github.io/Axiom.
.agents/
plugins/
marketplace.json
.claude-plugin/
marketplace.json
plugins/
axiom/
agents/
accessibility-auditor.md
build-fixer.md
build-optimizer.md
camera-auditor.md
codable-auditor.md
concurrency-auditor.md
core-data-auditor.md
crash-analyzer.md
database-schema-auditor.md
energy-auditor.md
foundation-models-auditor.md
grdb-performance-auditor.md
health-check.md
iap-auditor.md
iap-implementation.md
icloud-auditor.md
liquid-glass-auditor.md
memory-auditor.md
modernization-helper.md
networking-auditor.md
performance-profiler.md
resize-auditor.md
screenshot-validator.md
security-privacy-scanner.md
simulator-tester.md
spm-conflict-resolver.md
spritekit-auditor.md
storage-auditor.md
swift-performance-analyzer.md
swift-simplifier.md
swiftdata-auditor.md
swiftui-architecture-auditor.md
swiftui-layout-auditor.md
swiftui-nav-auditor.md
swiftui-performance-analyzer.md
test-debugger.md
test-failure-analyzer.md
test-runner.md
testing-auditor.md
textkit-auditor.md
triage-analyzer.md
ux-flow-auditor.md
bin/
xclog
xcprof
xcsym
xcui
claude-code.json
commands/
analyze-crash.md
ask.md
audit.md
compare-traces.md
console.md
fix-build.md
health-check.md
modernize.md
optimize-build.md
profile.md
resolve-deps.md
run-tests.md
screenshot.md
status.md
test-fixtures/
concurrency-antipatterns.swift
test-simulator.md
triage.md
ui.md
hooks/
hooks.json
metadata.txt
posttool-bash-hints_test.py
posttool-bash-hints.py
pretool-crash-route_test.py
pretool-crash-route.py
project_detect_test.py
project_detect.py
session-start_test.py
session-start.py
session-start.sh
subagent-start_test.py
subagent-start.py
swift-guardrails_test.py
swift-guardrails.py
user-prompt-submit_test.py
user-prompt-submit.py
README.md
skills/
axiom-accessibility/
SKILL.md
skills/
accessibility-auditor.md
accessibility-diag.md
ux-flow-audit.md
watchos-a11y.md
axiom-ai/
SKILL.md
skills/
core-ai.md
coreml-compression.md
coreml-conversion.md
coreml-training.md
foundation-models-adapters-diag.md
foundation-models-adapters-ref.md
foundation-models-adapters.md
foundation-models-auditor.md
foundation-models-diag.md
foundation-models-evaluations-diag.md
foundation-models-evaluations-ref.md
foundation-models-evaluations.md
foundation-models-guardrails.md
foundation-models-ref.md
foundation-models.md
ios-ml.md
suggested-actions.md
training-paths.md
axiom-apple-docs/
SKILL.md
skills/
apple-docs-research.md
axiom-build/
SKILL.md
skills/
build-debugging.md
build-performance.md
lldb-ref.md
lldb.md
modernization-helper.md
xcode-debugging.md
axiom-concurrency/
SKILL.md
skills/
assume-isolated.md
concurrency-auditor.md
concurrency-profiling.md
isolation-inheritance-diag.md
swift-concurrency-ref.md
swift-concurrency.md
synchronization.md
axiom-data/
SKILL.md
skills/
cloud-sync-diag.md
cloud-sync.md
cloudkit-ref.md
codable-auditor.md
codable.md
core-data-auditor.md
core-data-diag.md
core-data.md
database-migration.md
database-schema-auditor.md
grdb-app-groups.md
grdb-performance-auditor.md
grdb-performance.md
grdb.md
icloud-auditor.md
icloud-drive-ref.md
realm-migration-ref.md
sql-json-ref.md
sqlite-fts-ref.md
sqlitedata-migration.md
sqlitedata-ref.md
sqlitedata.md
storage-auditor.md
storage-diag.md
storage-management-ref.md
storage.md
swiftdata-auditor.md
swiftdata-migration-diag.md
swiftdata-migration.md
swiftdata.md
axiom-design/
SKILL.md
skills/
app-composition.md
hig-ref.md
hig.md
liquid-glass-auditor.md
liquid-glass-ref.md
liquid-glass.md
sf-symbols-ref.md
sf-symbols.md
typography-ref.md
axiom-games/
SKILL.md
skills/
game-input.md
spritekit-auditor.md
spritekit-diag.md
spritekit-ref.md
spritekit.md
axiom-graphics/
SKILL.md
skills/
display-performance.md
hdr-color-ref.md
metal-migration-diag.md
metal-migration-ref.md
metal-migration.md
realitykit-diag.md
realitykit-ref.md
realitykit.md
resizable-rendering.md
scenekit-ref.md
scenekit.md
usdkit.md
axiom-health/
SKILL.md
skills/
authorization-and-privacy.md
clinical-and-mobility.md
fundamentals.md
queries.md
sync-and-background.md
wellbeing-and-medications.md
workoutkit.md
workouts.md
axiom-integration/
SKILL.md
skills/
accessorysetupkit-ref.md
accessorysetupkit.md
alarmkit-ref.md
app-discoverability.md
app-intents-ref.md
app-shortcuts-ref.md
background-assets-ref.md
background-assets.md
background-processing-diag.md
background-processing-ref.md
background-processing.md
callkit-livecommunicationkit-ref.md
callkit-livecommunicationkit.md
contacts-ref.md
contacts.md
core-spotlight-ref.md
eventkit-ref.md
eventkit.md
extensions-widgets-ref.md
extensions-widgets.md
iap-auditor.md
in-app-purchases.md
live-activities-ref.md
live-activities.md
local-push-connectivity.md
localization-research-ref.md
localization.md
privacy-ux.md
push-notifications-diag.md
push-notifications-ref.md
push-notifications.md
shareplay-ref.md
shareplay.md
storekit-ref.md
timer-patterns-ref.md
timer-patterns.md
weatherkit.md
axiom-location/
SKILL.md
skills/
core-location-diag.md
core-location-ref.md
core-location.md
mapkit-diag.md
mapkit-ref.md
mapkit.md
axiom-macos/
SKILL.md
skills/
appkit-interop.md
appkit-modernization.md
direct-distribution.md
ios-apps-on-mac.md
menus-and-commands.md
sandbox-and-file-access.md
screencapturekit-ref.md
screencapturekit.md
settings.md
swiftui-differences.md
windows.md
axiom-media/
SKILL.md
skills/
avfoundation-ref.md
avfoundation-video-ref.md
camera-auditor.md
camera-capture-diag.md
camera-capture-ref.md
camera-capture.md
carplay-hig.md
carplay-navigation-ref.md
carplay-templates-ref.md
dockkit.md
haptics.md
media-intelligence.md
music-understanding.md
now-playing-carplay.md
now-playing-musickit.md
now-playing.md
photo-library-ref.md
photo-library.md
screen-capture.md
shareplay-playback.md
shazamkit-ref.md
shazamkit.md
system-media-routing.md
axiom-networking/
SKILL.md
skills/
network-framework-ref.md
networking-auditor.md
networking-diag.md
networking-discipline.md
networking-legacy.md
networking-migration.md
axiom-payments/
SKILL.md
skills/
apple-pay-ref.md
apple-pay-vs-iap.md
apple-pay-web-ref.md
apple-pay-web.md
apple-pay.md
payments-diag.md
tap-to-pay-ref.md
tap-to-pay.md
wallet-extensions-ref.md
wallet-orders.md
wallet-passes-ref.md
wallet-passes.md
axiom-performance/
SKILL.md
skills/
app-launch.md
energy-auditor.md
energy-diag.md
energy-ref.md
energy.md
hang-diagnostics.md
memory-auditor.md
memory-debugging.md
metrickit-ref.md
objc-block-retain-cycles.md
performance-profiling.md
swift-performance-analyzer.md
swift-performance.md
trace-comparison.md
xctrace-ref.md
axiom-security/
SKILL.md
skills/
agentic-security.md
app-attest.md
code-signing-diag.md
code-signing-ref.md
code-signing.md
cryptokit-ref.md
cryptokit.md
file-protection-ref.md
keychain-diag.md
keychain-ref.md
keychain.md
passkeys.md
security-privacy-scanner.md
axiom-shipping/
SKILL.md
skills/
app-clips-ref.md
app-clips.md
app-review-guidelines.md
app-store-connect-ref.md
app-store-diag.md
app-store-ref.md
app-store-submission.md
asc-mcp.md
expert-review-checklist.md
production-triage.md
testflight-triage.md
axiom-swift/
SKILL.md
skills/
deep-link-debugging.md
ownership-conventions.md
swift-modern.md
swift-simplifier.md
transferable-ref.md
tvos.md
axiom-swiftui/
SKILL.md
skills/
26-ref.md
... 1374 moreFAQ
axiom is a Claude Code plugin with 66 hand-picked skills for development work, indexed on Flowy. Install it with the command on its page. It includes axiom-accessibility, axiom-ai, axiom-analyze-crash. Its skills do not fire on their own yet. Request auto-invocation to have Flowy route them as you prompt. Free and open source.