Borrowing it
Nothing to install: this file belongs to elahlabs/elah. 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/elahlabs/elah/main/AGENTS.mdgit clone --depth 1 https://github.com/elahlabs/elahWrote 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/elahlabs/elah/agents-md)<a href="https://agentmods.dev/instructions/elahlabs/elah/agents-md"><img src="https://agentmods.dev/badge/instructions/elahlabs/elah/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/elahlabs/elah/agents-md"><img src="https://agentmods.dev/badge/instructions/elahlabs/elah/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 | $0.02168 | $0.02168 |
| Opus 5.5 | $0.00867 | $0.00867 |
| Sonnet 5.5 | $0.00434 | $0.00434 |
| Haiku 4.5 | $0.00217 | $0.00217 |
Grade A, and why
elah 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 9d 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 — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Brief for coding agents working inside this repository.
Building an app that consumes Elah, rather than working on Elah itself? Read
docs/ai/ELAH_FOR_AI_AGENTS.mdinstead — it is a single self-contained integration guide and needs no repo checkout.
What this is
Elah is a browser-native, frame-accurate video editing engine. A framework-agnostic core (timeline engine, pure resolver, WebGL2 renderer, WebCodecs decode, MP4 export) with React bindings layered on top, plus a headless CLI that renders the same projects server-side.
Three invariants hold everywhere. Do not violate them:
- Time is integer frames. Never store or compute positions in float seconds. Convert at
the edges with
secondsToFrames/framesToSeconds. - One mutation funnel. Every project edit goes through
TimelineEngine. The Zustand stores are read-only mirrors — writing to them desyncs the UI and breaks undo. - The resolver is pure.
resolveTimeline(frame, project) → Scenehas no side effects and no I/O. Renderers consumeSceneand nothing else; they never read the engine or the project directly.
Layout
| Path | What lives there |
|---|---|
packages/core |
Engine, resolver, WebGL2 renderer, demux/decode, stores, export. Zero React — enforced by src/no-react-imports.test.ts. |
packages/react |
React bindings only: editor context, store hooks, audio hooks. |
packages/timeline |
The <Timeline> UI — tracks, clips, ruler, playhead, drag/trim/snap. |
packages/editor |
Batteries-included composition: EditorProvider, Preview, panels. Re-exports the public API of the three above. |
packages/cli |
elah build / export / serve — headless rendering via Playwright + system Chrome. Versioned independently. |
apps/web |
The marketing + docs site (elah.dev). Docs pages are hand-written TSX, not MDX. |
apps/server |
Render-server example built on @elah/cli. |
examples/ |
Standalone example apps that install from npm. Outside the root workspace on purpose — see examples/AGENTS.md. |
packages/react-native |
@elah/react-native 0.1.0, pre-release, not published. Today: the platform-free timeline model (src/timeline/model/, Node tests, no React Native import allowed there). Versions independently, like the CLI. |
apps/mobile |
Expo dev harness for @elah/react-native. Not a root workspace member: own node_modules and lockfile (Expo pins React 19.2; the root hoists React 18). Metro loads @elah/* from packages/*/src and refuses the root @elah/core (its import.meta). See its README.md. |
docs/react-native/ |
Hand-off docs for the React Native binding (audit, architecture, workstreams, and the contributor issue drafts in issues/). Start at its README.md. |
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.
- 9d ago Changed · +3 lines · +185 tokens per session 51ae683bdfe0
- 1mo ago Changed · +29 lines · +415 tokens per session 39c0dc920ced
- 2mo ago First seen · 119 lines · 1,568 tokens per session scan A edaaf6895227
elah AGENTS.md is an instructions file published in the GitHub repository elahlabs/elah (72 stars, last pushed 6d ago), licensed Apache-2.0. It adds 2,168 tokens to every session, about $0.0087 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.
elah AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| elah AGENTS.mdelahlabs/elah | Instructions file | 72 | 6d ago | Apache-2.0 | A | 2,168 | 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 |