search-before-build: Instructions file for Codex

AGENTS.md

search-before-build AGENTS.md is an instructions file for Codex, OpenCode from user-w-ui/search-before-build. It costs 857 tokens per session, scanned A, original, MIT.

Guidelines for a dual-agent search-before-build package, whose workflows investigate existing products and compare ideas before development begins.

In plain words
What is it for?
Checking the package layout, validating the plugin, running its report viewer or installer, and deciding where requested research reports should be saved.
Why use it?
It defines the package structure and validation commands, reducing uncertainty about where shared instructions, scripts, reports, and tests belong.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions .claude-plugin; mentions Claude Code; mentions Codex.

This is user-w-ui/search-before-build's own configuration. It tells Codex and OpenCode how to work on search-before-build 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 search-before-build configures →

Reuse

Borrowing it

Nothing to install: this file belongs to user-w-ui/search-before-build. 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/user-w-ui/search-before-build/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/user-w-ui/search-before-build

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 search-before-build AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/user-w-ui/search-before-build/agents-md/github.svg)](https://agentmods.dev/instructions/user-w-ui/search-before-build/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/user-w-ui/search-before-build/agents-md"><img src="https://agentmods.dev/badge/instructions/user-w-ui/search-before-build/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 search-before-build AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/user-w-ui/search-before-build/agents-md"><img src="https://agentmods.dev/badge/instructions/user-w-ui/search-before-build/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 857 This file is loaded in full into every session.
When invoked 857 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 $0.00857 $0.00857
Opus 5.5 $0.00343 $0.00343
Sonnet 5.5 $0.00171 $0.00171
Haiku 4.5 $0.00086 $0.00086

Measured 20d ago against content hash 8f9b327bab8f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

search-before-build 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 20d 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 · 33 lines

How it starts

The opening of the file, as written. The whole thing — 33 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Guidelines

Project Structure & Module Organization

This repository is a multi-host skill package, not a compiled application. .claude-plugin/plugin.json (Claude Code), .codex-plugin/plugin.json (Codex, installed by bin/install.mjs), index.js (OpenCode, skill ids search-before-build-<skill>), the pi key in package.json, and the root plugin.json (Agent Plugins) expose the shared workflows in skills/: assess evaluates an idea or an existing project from whatever material the user supplies, and quick-search gives a fast, preliminary look at what already exists. Their internal candidate-research workflow lives in references/research-method.md; source-specific rules live in the other files under references/. The one-time installer is scripts/setup-github-mcp.mjs; the temporary result viewer is rendered by scripts/render-report.mjs from assets/report-viewer.html. Keep shared skill instructions platform-neutral; naming host-specific tools is fine only as non-exhaustive examples of a capability. tests/validate_plugin.py checks structure and behavioral invariants. Persisted reports are optional and belong in docs/search-before-build/<topic-slug>/<competitor-slug>.md only after an explicit user request.

Build, Test, and Development Commands

The decision kernel in src/ builds to dist/ with npm run build:kernel; commit the rebuilt dist/ with kernel changes. Run these commands from the repository root:

claude plugin validate --strict .
python tests/validate_plugin.py
npm test
claude --plugin-dir /path/to/search-before-build

The first command validates the Claude manifest and skill metadata. The second checks the manifests, skill boundaries, reference files, report structure, and showcase. The third runs the kernel and host tests. The fourth loads the Claude package for an interactive smoke test. Invoke /search-before-build:assess <idea or path> or /search-before-build:quick-search <idea> after loading it. Validate the Codex manifest with Codex's plugin validator before publishing a Codex marketplace entry.

Read the full file on GitHub · 33 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.

  1. 20d ago Changed · +2 tokens per session 8f9b327bab8f
  2. 26d ago Changed · +1 lines · +186 tokens per session 8ebecc45aba7
  3. 2mo ago First seen · 32 lines · 669 tokens per session scan A dbcf7e5effeb

Subscribe to this mod's changes

search-before-build AGENTS.md is an instructions file published in the GitHub repository user-w-ui/search-before-build (133 stars, last pushed 20d ago), licensed MIT. It adds 857 tokens to every session, about $0.0034 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.

Related

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search-before-build AGENTS.md next to 6 instructions from other repositories
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vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode