A knowledge guide for GPUI, a framework for building graphical user interfaces. It covers user actions, background work, application state, layout, events, focus, and tests.

Use it when building or debugging GPUI applications, including custom interface elements, keyboard controls, asynchronous tasks, shared state, layout, event handling, and tests.

It helps an agent work with GPUI concepts without having to look up how its interface and state systems fit together.

How feigeCode/navop configures Codex

Reuse

Borrowing it

Nothing to install: this file belongs to feigeCode/navop. 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/feigeCode/navop/main/.codex/skills/gpui/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/feigeCode/navop

Made for: Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/feigecode/navop/gpui/github.svg)](https://agentmods.dev/skills/feigecode/navop/gpui)

Your own site

<a href="https://agentmods.dev/skills/feigecode/navop/gpui"><img src="https://agentmods.dev/badge/skills/feigecode/navop/gpui/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/feigecode/navop/gpui"><img src="https://agentmods.dev/badge/skills/feigecode/navop/gpui.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 744 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00090	$0.00744
Opus 5.5	$0.00036	$0.00298
Sonnet 5.5	$0.00018	$0.00149
Haiku 4.5	$0.00009	$0.00074

Measured 2mo ago against content hash fadc5bfcf4d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gpui 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.

.codex/skills/gpui/SKILL.md · 44 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

22 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

2mo ago First seen · 44 lines · 90 tokens per session scan A fadc5bfcf4d0

Subscribe to this mod's changes

gpui is a skill published in the GitHub repository feigeCode/navop (2,095 stars, last pushed today), with no licence file. It adds 90 tokens to every session and 744 once invoked, about $0.0004 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.

Design and UX Frontend ai-agents clickhouse dameng duckdb iotdb kingbase

gpui next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
gpuifeigeCode/navop	Skill	2.1k	today	none	A	90	Codex
analytical-databases-expertpersonamanagmentlayer/pcl	Skill	44	11d ago	Apache-2.0	A	100	Claude Code
product-designchmonitor/chmonitor	Skill	304	yesterday	GPL-3.0	A	89	Claude Code
ui-ux-auditchmonitor/chmonitor	Skill	304	yesterday	GPL-3.0	A	85	Claude Code
principle-exhaust-the-design-spacechmonitor/chmonitor	Skill	304	yesterday	GPL-3.0	A	41	Claude Code
principle-experience-firstchmonitor/chmonitor	Skill	304	yesterday	GPL-3.0	A	37	Claude Code
webgl-holographic-foilnexu-io/open-design	Skill	106k	today	Apache-2.0	A	41	Claude Code, Codex

navop: Skill for Codex