What is webhook-tester AGENTS.md?

Project instructions for webhook-tester, a web application that receives and helps debug webhooks, which are HTTP messages sent between services. They describe the project's Go backend, React frontend, API contract, architecture, and rules for code changes.

Use them when changing the webhook-tester repository, especially its Go server, React interface, storage, WebSocket features, tunnel support, or OpenAPI-defined HTTP API.

They tell an agent which instructions take priority and how the application is organised before it edits code.

How tarampampam/webhook-tester configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to tarampampam/webhook-tester. 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/tarampampam/webhook-tester/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/tarampampam/webhook-tester

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/tarampampam/webhook-tester/agents-md/github.svg)](https://agentmods.dev/instructions/tarampampam/webhook-tester/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/tarampampam/webhook-tester/agents-md"><img src="https://agentmods.dev/badge/instructions/tarampampam/webhook-tester/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/tarampampam/webhook-tester/agents-md"><img src="https://agentmods.dev/badge/instructions/tarampampam/webhook-tester/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,353 This file is loaded in full into every session.

When invoked 1,353 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	$0.01353	$0.01353
Opus 5.5	$0.00541	$0.00541
Sonnet 5.5	$0.00271	$0.00271
Haiku 4.5	$0.00135	$0.00135

Measured 2mo ago against content hash 76c1e5366fe2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

webhook-tester 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 · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS - Project Rules

Read this file AND the global rules before making any code changes - https://tarampampam.github.io/.github/ai/AGENTS.md (mirror - https://raw.githubusercontent.com/tarampampam/.github/refs/heads/master/ai/AGENTS.md).

Instruction Priority

This file (AGENTS.md in this repository)
Global rules (external URLs)
Other documentation

If rules conflict, follow the highest priority source.

Project Overview

webhook-tester is a web application for testing and debugging webhooks. It consists of:

Go backend (cmd/, internal/) - HTTP API server, storage (in-memory/Redis/fs), WebSocket, ngrok tunnel support
TypeScript/React frontend (web/src/) - Vite-based SPA (React + Mantine UI + openapi-fetch)
OpenAPI spec (api/openapi.yml) - source of truth for the HTTP API contract

Go module: gh.tarampamp.am/webhook-tester/v2

Architecture

cmd/webhook-tester/        - CLI entrypoint (urfave/cli/v3)
internal/
  cli/                     - CLI command implementations
  http/
    handlers/              - one file per OpenAPI operation
    middleware/            - HTTP middleware
    openapi/               - generated server stubs (do not edit *.gen.*)
    server.go              - HTTP server wiring
  storage/                 - storage.go defines the interface; inmemory.go / redis.go / fs.go implement it
  pubsub/                  - pub/sub interface + memory/redis implementations (WebSocket notifications)
  tunnel/                  - ngrok tunnel integration
  logger/                  - zap logger setup
web/
  src/
    api/                   - schema.gen.ts (generated) + openapi-fetch client
    screens/               - page-level React components (home, session, not-found)
    shared/                - reusable components, hooks, utils, providers
    routing/               - route definitions
    db/                    - client-side IndexedDB (Dexie) for local state
api/openapi.yml            - OpenAPI 3.x spec (source of truth for all HTTP routes)

Read the full file on GitHub · 133 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 · 133 lines · 1,353 tokens per session scan A 76c1e5366fe2

Subscribe to this mod's changes

webhook-tester AGENTS.md is an instructions file published in the GitHub repository tarampampam/webhook-tester (552 stars, last pushed 2d ago), licensed MIT. It adds 1,353 tokens to every session, about $0.0054 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.

Go Planning push-notifications tester tests webhook websocket

webhook-tester AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
webhook-tester AGENTS.mdtarampampam/webhook-tester	Instructions file	552	2d ago	MIT	A	1,353	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

webhook-tester: Instructions file for Codex