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Agent skill

Fix Codesign Error

by robinebers in robinebers/openusage

Slash command that inspects a macOS signing or entitlement failure and explains the minimum fix path.

MITAuto-check passedAgent Workflows

Install Fix Codesign Error

skills CLI
$ npx skills add robinebers/openusage --skill fix-codesign-error -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install robinebers/openusage fix-codesign-error --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/robinebers/openusage.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/fix-codesign-error .claude/skills/fix-codesign-error && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
fix-codesign-error
GitHub stars
4.3k
Token cost
~280 tokens
SKILL.md length
113 words
Files
1
Skills in repo
25
Repo updated
First seen
Licence
MIT

At a glance

Slash command that inspects a macOS signing or entitlement failure and explains the minimum fix path.

  • Works in 4 steps: Inspect the app bundle, executable,… → Determine whether the problem is… → Summarize the exact failure class in… → …
  • Tasks that involve Hooks and plugins
  • SKILL.md covers Arguments, Workflow and Guardrails
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Fix Codesign Error is an agent skill from robinebers/openusage. Slash command that inspects a macOS signing or entitlement failure and explains the minimum fix path. Invoke explicitly with /fix-codesign-error — this skill never self-triggers.

Its SKILL.md is about 280 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Hooks and plugins. It works with macOS. The repository describes itself as: Burning through your subscriptions too fast? Paying for stuff you never use? Stop guessing. OpenUsage is free and open source. The licence is MIT.

When your agent uses it

  • Tasks that involve Hooks and plugins

Example prompts

  • “/fix-codesign-error”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Inspect the app bundle, executable, signing info, and entitlements.
  2. Determine whether the problem is identity, provisioning, hardened runtime, sandboxing, or trust policy.
  3. Summarize the exact failure class in plain language.
  4. Provide the minimal repair sequence or validation command.

What it can do on your machine

Read from SKILL.md and the folder at commit cb21465. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Fix Codesign Error loads about 280 tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 113 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~280

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from robinebers/openusage at commit cb21465, republished under its MIT licence (© robinebers). 113 words, ~280 tokens.

Download SKILL.mdSave it as .claude/skills/fix-codesign-error/SKILL.md (or your agent's skills folder).
name
fix-codesign-error
description
Slash command that inspects a macOS signing or entitlement failure and explains the minimum fix path. Invoke explicitly with /fix-codesign-error — this skill never self-triggers.
disable-model-invocation
true

Fix Codesign Error

Inspect a macOS signing or entitlement failure and explain the minimum fix path.

Arguments

  • app: path to .app bundle or binary (optional)
  • identity: signing identity hint (optional)
  • mode: inspect or repair-plan (optional, default: inspect)

Workflow

  1. Inspect the app bundle, executable, signing info, and entitlements.
  2. Determine whether the problem is identity, provisioning, hardened runtime, sandboxing, or trust policy.
  3. Summarize the exact failure class in plain language.
  4. Provide the minimal repair sequence or validation command.

Guardrails

  • Never invent entitlements; read them from the binary or source files.
  • Distinguish local development signing problems from distribution or notarization failures.
  • Prefer verifiable commands like codesign -d, spctl, and plutil over guesswork.

© robinebers, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/fix-codesign-error of robinebers/openusage.

Open the folder on GitHubat commit cb21465

Compare with similar skills

Fix Codesign Error next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Fix Codesign Error compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Fix Codesign Error this skillrobinebers/openusage4.3k—~280Automated safety check: PassMIT
OpenGUI Installer for DSHCore-Mate/OpenGUI1.8k—~1.1kAutomated safety check: PassCustom licence
OpenGUI Plugin InstallerCore-Mate/OpenGUI1.8k—~1kAutomated safety check: PassCustom licence
cmux Diagnosticsmanaflow-ai/cmux28k1 repos~819Automated safety check: PassCustom licence
Hook Development for Claude Code Pluginsanthropics/claude-plugins-official38k11 repos~4.1kAutomated safety check: NotesApache-2.0
Claude Code Agent Developmentanthropics/claude-plugins-official38k8 repos~2.8kAutomated safety check: PassApache-2.0

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Works with

Categories

Questions about Fix Codesign Error

What does Fix Codesign Error do?

Slash command that inspects a macOS signing or entitlement failure and explains the minimum fix path. Fix Codesign Error is an agent skill from robinebers/openusage. Slash command that inspects a macOS signing or entitlement failure and explains the minimum fix path.

When should I use Fix Codesign Error?

Fix Codesign Error fits situations like: tasks that involve Hooks and plugins.

How do I install Fix Codesign Error in Claude Code?

Run `npx skills add robinebers/openusage --skill fix-codesign-error -a claude-code`. Or copy the skill folder (.agents/skills/fix-codesign-error in robinebers/openusage) into .claude/skills/fix-codesign-error in your project. Claude Code loads it when a task matches its description.

How do I install Fix Codesign Error in Codex?

Run `npx skills add robinebers/openusage --skill fix-codesign-error -a codex`. Or copy the skill folder (.agents/skills/fix-codesign-error in robinebers/openusage) into .agents/skills/fix-codesign-error in your project. Codex loads it when a task matches its description.

Can I use Fix Codesign Error in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add robinebers/openusage --skill fix-codesign-error -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fix-codesign-error, .gemini/skills/fix-codesign-error, .github/skills/fix-codesign-error and .opencode/skills/fix-codesign-error in your project.

What does Fix Codesign Error need to run?

SKILL.md names no scripts, command-line tools or credentials: Fix Codesign Error is instructions for the agent only.

Does Fix Codesign Error access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Fix Codesign Error safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Fix Codesign Error use?

Fix Codesign Error is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Fix Codesign Error use?

About 280 tokens (SKILL.md is roughly 1.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Fix Codesign Error?

Skills that share tags, products or a category with Fix Codesign Error: OpenGUI Installer for DSH (Core-Mate/OpenGUI, 1.8k stars), OpenGUI Plugin Installer (Core-Mate/OpenGUI, 1.8k stars), cmux Diagnostics (manaflow-ai/cmux, 28k stars) and Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Fix Codesign Error?

robinebers (a GitHub user) maintains it in robinebers/openusage, which has 4,333 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on October 6, 2026.

Source: robinebers/openusage on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.