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Plex Documentation
Plex is a coding agent for building ambitious software. Use it to understand your codebase, plan and build features, fix bugs, review changes, and work with the tools you already use.
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Composer ghost
Rewrite the ghost-text pipeline to reduce suggestion latency, add multi-line preview, and handle cancellation when the user keeps typing.
Search ghost text render path
On it. I'll profile the current pipeline, fix the cancellation race, and add multi-line ghost-text rendering with proper stale-completion cleanup.
Summary
Ghost-text pipeline rewritten: p50 latency down 40%, multi-line preview renders inline, and stale completions are cancelled on keystroke.
9 return useMemo(() => {
10 if (!isPinned) {
13 const pinnedIconSize = isCompact ? 14 : 16;
14 const pinnedButtonSizeClass = isCompact ? 'h-5 w-5' : 'h-6 w-6';
15 }
31 return (
32 <div className="flex items-center self-stretch">
1 import { useEffect, useRef } from 'react';
4 export function useResizeObserver({ callback }) {
9 callbackRef.current = callback;
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Quickstart
Install Plex, connect a model provider, and ship your first agent-built feature in minutes.
Agent overview
Learn how the coding agent plans, edits, verifies, and reports back on every task.
Editor & automation
Ghost suggestions, quick-edit, cloud agents, and GitHub sync working together.
What you can do with Plex
Describe the app and Plex scaffolds the full project — configs, routes, styles — then keeps iterating with you file by file while you make the decisions.
- Ghost suggestions inline as you type, plus ⌘K quick-edit on any selection.
- Live preview with a streaming terminal, right beside the code.
- Two-way GitHub import and export with no plan gates.
- Cloud agents that build, test, and report back with a walkthrough.
Models
One request walks a fallback chain across Gemini, Groq, and OpenRouter. A quota hit on one provider just means the next one answers — see Models & Pricing.