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dubbl: Instructions file for Codex

AGENTS.md

dubbl AGENTS.md is an instructions file for Codex, OpenCode from dubbl-org/dubbl. It costs 349 tokens per session, scanned A, original, Apache-2.0.

Project-specific instructions for dubbl, a Next.js application with an MCP server and a database. MCP is a way for AI agents to call tools provided by an application.

In plain words
What is it for?
They guide feature work, MCP tool updates, Drizzle database migrations, TypeScript checks, and error handling.
Why use it?
They give coding agents the project's rules for verification, tool design, database changes, money values, and access control.

Instructions file for CodexOpenCode

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

This is dubbl-org/dubbl's own configuration. It tells Codex and OpenCode how to work on dubbl 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 dubbl configures →

not rated 62repo +2 2d ago A scan 349 tokens original Apache-2.0
View source ↗ dubbl-org/dubbl dubbl.dev
Reuse

Borrowing it

Nothing to install: this file belongs to dubbl-org/dubbl. 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/dubbl-org/dubbl/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/dubbl-org/dubbl

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.

agentmods badge for dubbl AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/dubbl-org/dubbl/agents-md/github.svg)](https://agentmods.dev/instructions/dubbl-org/dubbl/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/dubbl-org/dubbl/agents-md"><img src="https://agentmods.dev/badge/instructions/dubbl-org/dubbl/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.

agentmods 80×15 button for dubbl AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/dubbl-org/dubbl/agents-md"><img src="https://agentmods.dev/badge/instructions/dubbl-org/dubbl/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 349 This file is loaded in full into every session.
When invoked 349 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 $0.00349 $0.00349
Opus 5.5 $0.00140 $0.00140
Sonnet 5.5 $0.00070 $0.00070
Haiku 4.5 $0.00035 $0.00035

Measured 2mo ago against content hash 8d17262cc731, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dubbl 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 · 26 lines

What it actually says

Agent Rules

Build & Verification

  • Do NOT run full builds (npm run build, next build, etc.)
  • Use lint (npm run lint) or typecheck (npx tsc --noEmit) instead for verification
  • Run dev server (npm run dev) only when explicitly asked
  • This project uses Next.js -- all dev/build/start commands go through next

MCP Server Conventions

  • Every user-facing feature must have corresponding MCP tools
  • Keep MCP tools updated when REST API routes change
  • Tool descriptions must be clear for AI agents -- state input expectations (e.g. "amounts in cents") and what is returned
  • All monetary amounts are in integer cents (e.g. $12.50 = 1250)
  • MCP tools use direct DB access via Drizzle, not HTTP self-calls
  • All tools are org-scoped via AuthContext passed at server creation time
  • Use wrapTool() from lib/mcp/errors.ts for consistent error handling
  • Tool files live in lib/mcp/tools/ and export a registerXTools(server, ctx) function
  • Register new tool files in lib/mcp/tools/index.ts
  • Use .describe() on every Zod field in tool input schemas
  • One tool per operation (no multi-purpose tools)

Database

  • All schema changes require Drizzle migration files -- run npx drizzle-kit generate after modifying any file in lib/db/schema/
  • Never use npx drizzle-kit push in production -- it applies changes directly without migrations
  • Migration files live in drizzle/ and must be committed alongside schema changes
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. 2mo ago First seen · 26 lines · 349 tokens per session scan A 8d17262cc731

Subscribe to this mod's changes

dubbl AGENTS.md is an instructions file published in the GitHub repository dubbl-org/dubbl (62 stars, last pushed 2d ago), licensed Apache-2.0. It adds 349 tokens to every session, about $0.0014 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.

Finance and fintechaccountingbookkeepingbusinesscrminventory-management
Related

dubbl AGENTS.md compared with instructions from other repositories

dubbl AGENTS.md next to 6 instructions from other repositories
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dubbl AGENTS.mddubbl-org/dubblInstructions file622d agoApache-2.0A349Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA2,022GitHub Copilot