Workflow is a TypeScript SDK for building applications and AI agents whose work can continue reliably across steps and be observed while running. It is for developers creating durable workflows and orchestration logic for applications or agents. The catalogue add-ons provide workflows, rules, instructions, settings, commands, and agents for using the SDK.
Borrowing it
Nothing to install: this file belongs to vercel/workflow. 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/vercel/workflow/main/AGENTS.mdgit clone --depth 1 https://github.com/vercel/workflowWrote 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/vercel/workflow/agents-md)<a href="https://agentmods.dev/instructions/vercel/workflow/agents-md"><img src="https://agentmods.dev/badge/instructions/vercel/workflow/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/vercel/workflow/agents-md"><img src="https://agentmods.dev/badge/instructions/vercel/workflow/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 | $0.10420 | $0.10420 |
| Opus 5.5 | $0.04168 | $0.04168 |
| Sonnet 5.5 | $0.02084 | $0.02084 |
| Haiku 4.5 | $0.01042 | $0.01042 |
Grade A, and why
workflow 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 today.
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 — 591 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent instructions
CRITICAL RULES:
- NEVER push directly to the
mainorstablebranches - Do not remove or break agent-discoverable docs sitemap behavior: keep docs/app/sitemap.md/route.ts and docs/app/[lang]/sitemap.md/route.ts, and keep the sitemap link in docs/app/[lang]/llms.mdx/[[...slug]]/route.ts.
Overview
Workflow SDK is a durable functions framework for JavaScript/TypeScript that enables writing long-running, stateful application logic on top of stateless compute. The runtime persists progress as an event log and deterministically replays code to reconstruct state after cold starts, failures, or scale events.
This repository contains the client-side SDK code for workflows, along with example apps that showcase Workflow SDK in action.
Architecture
Core components
- packages/core: Core workflow runtime and primitives (
@workflow/core) - packages/next: Next.js integration (
@workflow/next) - packages/cli: Command-line interface (
@workflow/cli) - packages/world: Core interfaces and types for workflow storage backends (
@workflow/world) - packages/world-local: Filesystem-based workflow backend for local development and testing (
@workflow/world-local) - packages/world-vercel: Production workflow backend for Vercel platform deployments (
@workflow/world-vercel) - packages/swc-plugin-workflow: SWC compiler plugin for workflow transformations
- workbench/example: Basic workflow examples using the CLI (aka "standalone mode")
- workbench/nextjs-turbopack: Workflow examples using the Next.js integration
Workflow execution model
Workflows consist of two types of functions:
- Workflow functions (
"use workflow"): Orchestrators that run in a sandboxed VM without full Node.js access - Step functions (
"use step"): Individual pieces of logic with full Node.js runtime access
The framework uses compiler transformations to split workflow files into separate bundles for client, workflow, and step execution contexts.
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.
- today Changed · +8 lines · +162 tokens per session 581f686a06a5
- yesterday Changed · +1 lines · +59 tokens per session dc911a887c70
- 6d ago Changed · +11 lines · +190 tokens per session 2cae271beb38
- 1mo ago Changed · +16 lines · +968 tokens per session 4fdf999f3042
- 1mo ago Changed · +4 lines · +77 tokens per session 2a1bd4aad562
- 1mo ago Changed · +2 lines · +98 tokens per session 15ff57959989
- 1mo ago Changed · +5 lines · +76 tokens per session 90ba6b0c516b
- 2mo ago Changed · +1 lines · +92 tokens per session 6295078afd7c
- 2mo ago First seen · 543 lines · 8,698 tokens per session scan A f6fabb8c5999
workflow AGENTS.md is an instructions file published in the GitHub repository vercel/workflow (2,493 stars, last pushed today), licensed Apache-2.0. It adds 10,420 tokens to every session, about $0.0417 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.
workflow AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| workflow AGENTS.mdvercel/workflow | Instructions file | 2.5k | today | Apache-2.0 | A | 10,420 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |