A macOS add-on that changes Claude Code and Codex editor themes to match the computer’s light or dark system appearance. It includes the gruvbox-light and sunset-drive themes and installs them on first use.

Use it to synchronize Claude Code and Codex between light and dark themes on macOS, including the bundled custom themes.

The editor theme can otherwise stay different from the rest of the desktop after the system appearance changes. This keeps the two editors aligned with macOS automatically when a prompt is submitted.

auto-theme — Plugin by IvanLutsenko

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.

Claude Code

/plugin marketplace add IvanLutsenko/awac-ai-agent-plugins

agentmods

npx agentmods add plugins/ivanlutsenko/awac-ai-agent-plugins/auto-theme

Clone the repo

git clone --depth 1 https://github.com/IvanLutsenko/awac-ai-agent-plugins

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

auto-theme 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 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.

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.

plugins/auto-theme/.claude-plugin/plugin.json · 27 lines

What it actually says

{
  "name": "auto-theme",
  "description": "Syncs Claude Code and Codex themes with macOS system appearance (light/dark) on every prompt. Bundles custom gruvbox-light / sunset-drive themes and installs them on first run.",
  "version": "1.1.2",
  "author": {
    "name": "Ivan Lutsenko",
    "email": "[email protected]",
    "url": "https://github.com/IvanLutsenko"
  },
  "keywords": ["theme", "dark-mode", "light-mode", "macos", "appearance", "auto"],
  "license": "MIT",
  "hooks": {
    "UserPromptSubmit": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "bash ${CLAUDE_PLUGIN_ROOT}/sync-theme.sh",
            "timeout": 10
          }
        ]
      }
    ]
  }
}

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.

2d ago First seen · 27 lines scan A f1f3af3f42e2

Subscribe to this mod's changes

auto-theme is a plugin published in the GitHub repository IvanLutsenko/awac-ai-agent-plugins (2 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.

Data and AI

auto-theme

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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