lite-render-perf

Guidance for keeping React rendering in the `apps/lite` application responsive. React is a JavaScript library for building user interfaces, and rendering is the work of producing what appears on screen.

In plain words
What is it for?
It is for changing or reviewing render-time calculations, context, Redux or query subscriptions, row lists, and slow or overly re-rendering Lite screens.
Why use it?
It helps find performance regressions caused by repeated calculations, shared state subscriptions, queries, contexts, or lists of table-like rows.

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/gitbutlerapp/gitbutler/lite-render-perf
Any agent
npx skills add gitbutlerapp/gitbutler --skill lite-render-perf
Clone the repo
git clone --depth 1 https://github.com/gitbutlerapp/gitbutler

Made for: Claude Code, Codex.

Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,527 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00088 $0.02527
Opus 5 $0.00044 $0.01264
Sonnet 5 $0.00018 $0.00505
Haiku 4.5 $0.00009 $0.00253

Measured 3d ago against content hash f78e4a94b12b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

lite-render-perf scanned grade A with 1 finding 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 3d 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.

Makes network callslowCapability

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

`curl http://127.0.0.1:9222/json` lists debug targets. Pick the entry with
.agents/skills/lite-render-perf/SKILL.md · 227 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 3d ago First seen · 227 lines · 88 tokens per session scan A f78e4a94b12b

Subscribe to this mod's changes

lite-render-perf is a skill published in the GitHub repository gitbutlerapp/gitbutler (21,592 stars, last pushed 3d ago), with no licence file. It adds 88 tokens to every session and 2,527 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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