Borrowing it
Nothing to install: this file belongs to MrUjjwalG/movi-player. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/MrUjjwalG/movi-player/main/AGENTS.mdgit clone --depth 1 https://github.com/MrUjjwalG/movi-playerWrote 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.
[](https://agentmods.dev/instructions/mrujjwalg/movi-player/agents-md)<a href="https://agentmods.dev/instructions/mrujjwalg/movi-player/agents-md"><img src="https://agentmods.dev/badge/instructions/mrujjwalg/movi-player/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.
<a href="https://agentmods.dev/instructions/mrujjwalg/movi-player/agents-md"><img src="https://agentmods.dev/badge/instructions/mrujjwalg/movi-player/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.08031 | $0.08031 |
| Opus 5.5 | $0.03212 | $0.03212 |
| Sonnet 5.5 | $0.01606 | $0.01606 |
| Haiku 4.5 | $0.00803 | $0.00803 |
Grade A, and why
movi-player 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 514 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — movi-player for AI coding assistants
This file orients an AI assistant (Claude, Cursor, Codex, Copilot, …) that has just been pointed at the movi-player repo or has it installed as a dependency. It is not end-user documentation — see README.md and https://moviplayer.com for that. The intent here is to make the assistant useful for debugging, extending, and integrating the player without re-discovering the architecture every conversation.
If you are an AI assistant: read this top to bottom once, then refer back by section when you take an action that touches the player.
1. What this is
movi-player is a browser video player that plays formats the native <video> element can't: MKV, HEVC, AV1, 4K HDR, multi-audio, embedded subtitles, encrypted streams. It does this with:
- FFmpeg (libavformat) compiled to WebAssembly for demuxing arbitrary container formats.
- WebCodecs API (Chrome, Safari 18+, Firefox 130+) for hardware-accelerated decoding when available, software dav1d/de265 in WASM as fallback.
- Canvas/WebGL2 for presentation (the spec for
<canvas>lets you render HDR viadisplay-p3color space; native<video>can't expose that on most browsers).
Shipped as a web component (<movi-player>) plus three lower-level entry points (/player, /demuxer) for programmatic use. License: Apache-2.0.
The same engine ships in four wrappers built on the web component: an Electron desktop app (desktop/, Win/Mac/Linux — local files, URLs, native always-on-top PiP, playlist), a Chrome extension (chrome-extension/), a Firefox add-on (firefox-extension/ — the Chrome extension's files copied in by its build.sh; only manifest.json is Gecko-specific, so edit shared UI in chrome-extension/), and a VS Code extension (vscode-extension/).
2. Package entry points
Set in package.json. Three bundle tiers, picked by import path:
| Import | Bundle size | What you get |
|---|---|---|
movi-player or movi-player/element |
~410 KB | Full web component including all controls, gestures, ambient mode, subtitle rendering, chapters, etc. |
movi-player/player |
~180 KB | MoviPlayer class — programmatic playback orchestration without UI. Bring your own canvas + controls. |
movi-player/demuxer |
~45 KB | Demuxer, source adapters, decoders. For metadata extraction, thumbnail generation, manual pipelines. |
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.
- 1mo ago Changed · +73 lines · +1,156 tokens per session c40bdfa0174a
- 2mo ago First seen · 441 lines · 6,875 tokens per session scan A b994974a1419
movi-player AGENTS.md is an instructions file published in the GitHub repository MrUjjwalG/movi-player (96 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 8,031 tokens to every session, about $0.0321 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.
movi-player AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| movi-player AGENTS.mdMrUjjwalG/movi-player | Instructions file | 96 | 1mo ago | Apache-2.0 | A | 8,031 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |