What is agentic-development-starter-kit AGENTS.md?

Instructions for maintaining the Agentic Development Starter Kit, a package that adds reusable agent skills and optional Cursor setup to applications. They distinguish work on the kit from installing it in an adopter's app.

Use them when changing the kit, syncing it, updating adopter installations, working with profiles, or using the create-adsk command.

They prevent contributors from copying files by hand or building the wrong installation and product model.

How rhyanvargas/agentic-development-starter-kit configures Codex and O

Reuse

Borrowing it

Nothing to install: this file belongs to rhyanvargas/agentic-development-starter-kit. 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/rhyanvargas/agentic-development-starter-kit/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/rhyanvargas/agentic-development-starter-kit

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/rhyanvargas/agentic-development-starter-kit/agents-md/github.svg)](https://agentmods.dev/instructions/rhyanvargas/agentic-development-starter-kit/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/rhyanvargas/agentic-development-starter-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/rhyanvargas/agentic-development-starter-kit/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/rhyanvargas/agentic-development-starter-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/rhyanvargas/agentic-development-starter-kit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,390 This file is loaded in full into every session.

When invoked 1,390 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.

Model	Per session	Once invoked
Fable 5.1	$0.01390	$0.01390
Opus 5.5	$0.00556	$0.00556
Sonnet 5.5	$0.00278	$0.00278
Haiku 4.5	$0.00139	$0.00139

Measured 2mo ago against content hash 67e745de5ee3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agentic-development-starter-kit 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 2mo 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.

AGENTS.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions — The Agentic Development Starter Kit (ADSK)

This repository is the kit source (package + optional Cursor wiring).

Adopters adding ADSK to an app: follow docs/using-adsk.md — install into .agents/skills/, not a root skills/ folder. Org rules/policies (survive kit updates): docs/customizing-org-rules.md.

Product direction (adopter)

Contract: docs/product/create-adsk.md — kit profile adoption, not a skills marketplace.
Profiles: profiles.json (core / delivery / maintainer / skills-only).
Rule: .cursor/rules/adopter-product/ — do not invent skill-picker UX that competes with skills.sh.
Adopter CLI: npx create-adsk (packages/create-adsk) — wraps npx skills + Cursor adopter sync; living spec .cursor/docs/specs/create-adsk.md.
Alternate: npx skills add … and/or scripts/sync-adsk.sh adopter --from <kit> (see using-adsk).

When the user asks to sync ADSK

Do not hand-copy skill trees or Cursor files.

Context	Run
This kit repo	`./scripts/sync-adsk.sh kit` (optional: `./scripts/sync-adsk.sh self-check`)
Adopter app with `.adsk/config.json`	`npx create-adsk update` (or `status`)
Adopter app (script path)	Resolve kit checkout → `<kit>/scripts/sync-adsk.sh adopter --from <kit>` from the app root

Playbook: .cursor/commands/sync-adsk.md. Dual-audience steps: docs/upgrading.md.

Kit layout (this repo)

Package source: skills/<name>/ (Agent Skills SKILL.md — what npx skills add ships)
Discovery links (do not duplicate trees):
- .agents/skills/<name> → ../../skills/<name>
- .cursor/skills/<name> → ../../skills/<name>
Cursor wiring: .cursor/commands/, .cursor/rules/ — thin wrappers; reference skills, don’t copy playbooks
Sync script: scripts/sync-adsk.sh

Read the full file on GitHub · 79 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.

2mo ago First seen · 79 lines · 1,390 tokens per session scan A 67e745de5ee3

Subscribe to this mod's changes

agentic-development-starter-kit AGENTS.md is an instructions file published in the GitHub repository rhyanvargas/agentic-development-starter-kit (2 stars, last pushed 4d ago), licensed Apache-2.0. It adds 1,390 tokens to every session, about $0.0056 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 2026-08-31.

Building agents

agentic-development-starter-kit AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
agentic-development-starter-kit AGENTS.mdrhyanvargas/agentic-development-starter-kit	Instructions file	2	4d ago	Apache-2.0	A	1,390	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	today	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

agentic-development-starter-kit: Instructions file for Codex