asc-notarization

A procedure for preparing macOS apps for distribution outside Apple’s App Store using Developer ID signing and Apple notarization.

In plain words
What is it for?
It is for archiving, signing, exporting, and notarizing a macOS app built with Xcode.
Why use it?
It checks the certificates, authentication, tools, and build before submission, helping avoid signing or notarization failures.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/abdullah4ai/apple-developer-toolkit/asc-notarization
Any agent
npx skills add Abdullah4AI/apple-developer-toolkit --skill asc-notarization
Clone the repo
git clone --depth 1 https://github.com/Abdullah4AI/apple-developer-toolkit

Made for: Claude Code, Codex.

Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,601 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00047 $0.01601
Opus 5 $0.00023 $0.00800
Sonnet 5 $0.00009 $0.00320
Haiku 4.5 $0.00005 $0.00160

Measured 2d ago against content hash e71916140346, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

asc-notarization scanned grade C with 2 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 2d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -sL "LOG_URL" | python3 -m json.tool

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -sL "LOG_URL" | python3 -m json.tool
Origin

This is a copy

100% identical to asc-notarization — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

swiftship/internal/skills/data/features/asc-notarization/SKILL.md · 213 lines

How it starts

The opening of the file, as written. The whole thing — 213 lines — stays where its author put it; the contents beside it link to each section on GitHub.

macOS Notarization

Use this skill when you need to notarize a macOS app for distribution outside the App Store.

Preconditions

  • Xcode installed and command line tools configured.
  • Auth is configured (asc auth login or ASC_* env vars).
  • A Developer ID Application certificate in the local keychain.
  • The app's Xcode project builds for macOS.

Preflight: Verify Signing Identity

Before archiving, confirm a valid Developer ID Application identity exists:

security find-identity -v -p codesigning | grep "Developer ID Application"

If no identity is found, create one at https://developer.apple.com/account/resources/certificates/add (the App Store Connect API does not support creating Developer ID certificates).

Fix Broken Trust Settings

If codesign or xcodebuild fails with "Invalid trust settings" or "errSecInternalComponent", the certificate may have custom trust overrides that break the chain:

# Check for custom trust settings
security dump-trust-settings 2>&1 | grep -A1 "Developer ID"

# If overrides exist, export the cert and remove them
security find-certificate -c "Developer ID Application" -p ~/Library/Keychains/login.keychain-db > /tmp/devid-cert.pem
security remove-trusted-cert /tmp/devid-cert.pem

Verify Certificate Chain

After fixing trust settings, verify the chain is intact:

codesign --deep --force --options runtime --sign "Developer ID Application: YOUR NAME (TEAM_ID)" /path/to/any.app 2>&1

The signing must show the chain: Developer ID Application → Developer ID Certification Authority → Apple Root CA.

Step 1: Archive

xcodebuild archive \
  -scheme "YourMacScheme" \
  -configuration Release \
  -archivePath /tmp/YourApp.xcarchive \
  -destination "generic/platform=macOS"

Step 2: Export with Developer ID

Create an ExportOptions plist for Developer ID distribution:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>method</key>
    <string>developer-id</string>
    <key>signingStyle</key>
    <string>automatic</string>
    <key>teamID</key>
    <string>YOUR_TEAM_ID</string>
</dict>
</plist>

Read the full file on GitHub · 213 lines

Changes

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.

  1. 2d ago First seen · 213 lines · 47 tokens per session scan C e71916140346

Subscribe to this mod's changes

asc-notarization is a skill published in the GitHub repository Abdullah4AI/apple-developer-toolkit (10 stars, last pushed 5d ago), licensed MIT. It adds 47 tokens to every session and 1,601 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). It is 100% identical to asc-notarization, differing in 0 lines, and is treated as a copy.

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