remotion-agent-catalog: Instructions file for Codex

AGENTS.md

remotion-agent-catalog AGENTS.md is an instructions file for Codex, OpenCode from victorsodre/remotion-agent-catalog. It costs 2,416 tokens per session, scanned A, original, MIT.

A project instruction file for Remotion, a JavaScript framework for creating videos with React. It documents six easy-to-miss rules about video sizes, scenes, sequences, and data passed into compositions.

In plain words
What is it for?
Copy it into a Remotion project to guide agents when creating or changing compositions, including landscape, vertical, scaled, and data-driven scenes.
Why use it?
It gives coding agents the project’s implementation rules before they edit video compositions. This helps prevent silent layout problems such as incorrectly sized text or content spilling outside the frame.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is victorsodre/remotion-agent-catalog's own configuration. It tells Codex and OpenCode how to work on remotion-agent-catalog itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything remotion-agent-catalog configures →

Reuse

Borrowing it

Nothing to install: this file belongs to victorsodre/remotion-agent-catalog. 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/victorsodre/remotion-agent-catalog/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/victorsodre/remotion-agent-catalog

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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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.

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<a href="https://agentmods.dev/instructions/victorsodre/remotion-agent-catalog/agents-md"><img src="https://agentmods.dev/badge/instructions/victorsodre/remotion-agent-catalog/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,416 This file is loaded in full into every session.
When invoked 2,416 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 5.1 $0.02416 $0.02416
Opus 5 $0.01208 $0.01208
Sonnet 5 $0.00483 $0.00483
Haiku 4.5 $0.00242 $0.00242

Measured yesterday against content hash e6b0424c7abb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

remotion-agent-catalog 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 yesterday.

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.

AGENTS.md · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Copy this guide into a Remotion project before an agent writes a composition. In this repository, start with README.md and docs/ARQUITETURA.md. The npm run catalog command mentioned below belongs to the source generator and is intentionally absent here.

catalog.json is generated. Never edit it by hand in this repository.

Six failure modes

These were found by breaking real compositions. Most fail silently.

1. useVideoConfig() reports the composition, not its container

Components that calculate font size, safe area, or percentage positions read the dimensions of their <Composition>, not the element that contains them. transform: scale() shrinks the frame but not its layout calculations.

  • To show a 1920×1080 scene in a cell, use the cena: true Item flag so it renders at full size before it is scaled.
  • For vertical work, create a real 1080×1920 <Composition>.
  • cena: true is also required for canvas-percentage components such as SimulatedCursor.

2. Sequence renders an AbsoluteFill

It leaves normal flow. Several Sequence elements inside a space-between flex layout collapse into the upper-left corner. Stack them with explicit absolute top and left positions, as in src/playground/pecas.tsx.

3. defaultProps crosses a JSON boundary

React elements arrive as {key, ref, props} and can trigger React error #31. Do not pass JSX through defaultProps; build stable page components in the module instead:

const COMPONENTES = Object.fromEntries(
  PAGINAS.map((p) => [p.id, () => <Pagina {...p} />]),
);

4. Effect order and type matter

  • Generators (checkerboard, rings, lightLeak, zigzag) draw new pixels and discard what was below.
  • Filters (thermalVision, halftone, pixelate, duotone, zoomBlur) transform existing pixels.

A filter with no input produces nothing; a generator at the end erases previous work. Configure effects explicitly—many defaults, including duotone({}), are not useful.

Read the full file on GitHub · 118 lines

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. yesterday Changed · -115 lines · -1,689 tokens per session e6b0424c7abb
  2. 9d ago First seen · 233 lines · 4,105 tokens per session scan A 31c144b33f7a

Subscribe to this mod's changes

remotion-agent-catalog AGENTS.md is an instructions file published in the GitHub repository victorsodre/remotion-agent-catalog (11 stars, last pushed 2d ago), licensed MIT. It adds 2,416 tokens to every session, about $0.0121 per session on Opus 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.

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