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CodexSkillManager: Instructions file for Codex

AGENTS.md

CodexSkillManager AGENTS.md is an instructions file for Codex, OpenCode from Dimillian/CodexSkillManager. It costs 880 tokens per session, scanned A, original, MIT.

Project instructions for CodexSkillManager, a small macOS app that lists installed Codex skills. It explains the app's SwiftUI interface, folder scanning, build commands, and release packaging.

In plain words
What is it for?
Use it when editing, building, running, packaging, signing, notarizing, or releasing CodexSkillManager.
Why use it?
It gives coding agents the project facts and required checks so changes can be built and packaged consistently.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads ~/.codex paths; mentions Codex.

This is Dimillian/CodexSkillManager's own configuration. It tells Codex and OpenCode how to work on CodexSkillManager itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything CodexSkillManager configures →

not rated 1.4krepo +2 9mo ago A scan 880 tokens original MIT
View source ↗ Dimillian/CodexSkillManager
About the project

Codex Skill Manager is a macOS SwiftUI application for browsing and managing local skills used by Codex and Claude Code. Developers use it to inspect, import, remove, search, and download skills from Clawdhub. Its catalogue instruction supports the app's workflow for managing Codex skills.

Dimillian/CodexSkillManager · 1,379 stars · on GitHub

Reuse

Borrowing it

Nothing to install: this file belongs to Dimillian/CodexSkillManager. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Dimillian/CodexSkillManager/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Dimillian/CodexSkillManager

Made for: Codex, OpenCode.

Wrote 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.

agentmods badge for CodexSkillManager AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/dimillian/codexskillmanager/agents-md"><img src="https://agentmods.dev/badge/instructions/dimillian/codexskillmanager/agents-md/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.

agentmods 80×15 button for CodexSkillManager AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/dimillian/codexskillmanager/agents-md"><img src="https://agentmods.dev/badge/instructions/dimillian/codexskillmanager/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 880 This file is loaded in full into every session.
When invoked 880 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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 5.1 $0.00880 $0.00880
Opus 5.5 $0.00352 $0.00352
Sonnet 5.5 $0.00176 $0.00176
Haiku 4.5 $0.00088 $0.00088

Measured 2mo ago against content hash fa42ec8ea182, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

CodexSkillManager AGENTS.md scanned grade A with 0 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 2mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CodexSkillManager

What this app is

CodexSkillManager is a small macOS SwiftUI app built with SwiftPM (no Xcode project) that lists the Codex skills installed in the user's public skills folder.

How it works

  • The app scans ~/.codex/skills and ~/.codex/skills/public for subdirectories.
  • Each directory name becomes a skill entry.
  • The UI is a SwiftUI NavigationSplitView with a list on the left and a detail view on the right.
  • The detail view shows the skill name and its full path.

Build and run

  • Build: swift build
  • Run: swift run CodexSkillManager When editing this app, build after each change and fix any compile errors before continuing.

Packaging and release

Use the macos-spm-app-packaging skill for packaging, notarization, appcast, and GitHub release steps. Local packaging helpers live in Scripts/:

  • Scripts/compile_and_run.sh: package (adhoc sign) + launch the .app.
  • Scripts/package_app.sh: build and create CodexSkillManager.app.
  • Scripts/sign-and-notarize.sh: sign + notarize for releases.
  • Scripts/make_appcast.sh: generate Sparkle appcast from a zip.
  • Scripts/generate_sparkle_keys.sh: generate Sparkle keypair and export private key.

Sparkle env vars (set in ~/.zshrc):

  • SPARKLE_PUBLIC_KEY
  • SPARKLE_PRIVATE_KEY_FILE
  • SPARKLE_FEED_URL

Release flow (commit → changelog → notarize → appcast → GitHub release)

  1. Update version: bump MARKETING_VERSION and BUILD_NUMBER in version.env.
  2. Build: swift build.
  3. Commit + push:
    • git add -A
    • git commit -m "feat: ..." (or other Conventional Commit type)
    • git push
  4. Write release notes (short, user-facing bullets) and save to a file, e.g. /tmp/codexskillmanager-release-notes-<version>.md.
  5. Notarize and package:
    • APP_STORE_CONNECT_API_KEY_P8="/path/to/key.p8" APP_STORE_CONNECT_KEY_ID="..." APP_STORE_CONNECT_ISSUER_ID="..." APP_IDENTITY="Developer ID Application: ..."
    • ./Scripts/sign-and-notarize.sh
    • Note: SPARKLE_PUBLIC_KEY must be set (and SPARKLE_FEED_URL if non-default) or the build will be missing Sparkle keys and updates will not work.
  6. Generate Sparkle appcast entry:
    • SPARKLE_PRIVATE_KEY_FILE="..." ./Scripts/make_appcast.sh CodexSkillManager-<version>.zip https://raw.githubusercontent.com/Dimillian/CodexSkillManager/main/appcast.xml
    • Note: Sparkle uses the build number (BUILD_NUMBER) for sparkle:version, so it must increase each release.
    • git add appcast.xml
    • git commit -m "chore: update sparkle appcast"
    • git push
  7. Publish GitHub release (creates the tag):
    • gh release create v<version> CodexSkillManager-<version>.zip appcast.xml --title "Codex Skill Manager <version>" --notes-file /tmp/codexskillmanager-release-notes-<version>.md

Read the full file on GitHub · 59 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. 2mo ago First seen · 59 lines · 880 tokens per session scan A fa42ec8ea182

Subscribe to this mod's changes

CodexSkillManager AGENTS.md is an instructions file published in the GitHub repository Dimillian/CodexSkillManager (1,379 stars, last pushed 9mo ago), licensed MIT. It adds 880 tokens to every session, about $0.0035 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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