What is contentful-resolve-response AGENTS.md?

A set of instructions for maintaining a JavaScript library that resolves links and other response data from Contentful, a content-management platform. It lists the project structure, required behavior, and important compatibility rules.

Use it when modifying link resolution, input copying, provider handling, the single-file implementation, or related project documentation and tests.

It highlights constraints such as keeping inputs unchanged, preserving unknown providers, and retaining special unresolved-link handling.

How contentful/contentful-resolve-response configures Codex and OpenCo

Reuse

Borrowing it

Nothing to install: this file belongs to contentful/contentful-resolve-response. 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/contentful/contentful-resolve-response/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/contentful/contentful-resolve-response

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/contentful/contentful-resolve-response/agents-md/github.svg)](https://agentmods.dev/instructions/contentful/contentful-resolve-response/agents-md)

Your own site

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

Per session 666 This file is loaded in full into every session.

When invoked 666 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	$0.00666	$0.00666
Opus 5.5	$0.00266	$0.00266
Sonnet 5.5	$0.00133	$0.00133
Haiku 4.5	$0.00067	$0.00067

Measured 2mo ago against content hash 32f9c59d9a60, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

contentful-resolve-response 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 · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Guide

Read this file first. It tells you where to find context in this repo.

Quick Reference

What you need	Where to look
How this repo is structured	ARCHITECTURE.md
How to build/test/run	CONTRIBUTING.md
Why decisions were made	docs/ADRs/
What this repo does	README.md
PR review rules	.bito/guidelines/
Active specs/work	docs/specs/

Sharp Edges & Invariants

Single-file library — All implementation lives in index.js. There is no src/ directory or multi-file architecture. Do not split into multiple files without an ADR.
Input immutability contract — The library deep-copies input via fast-copy before mutation. Never remove or bypass this copy step; consumers rely on their input being unmodified.
UNRESOLVED_LINK sentinel — Uses a unique empty object ({}) as a sentinel, not null/undefined/Symbol. Do not change this pattern; it avoids polyfill bloat and is used for identity comparison.
ResourceLink provider check — Only Contentful: prefixed resource links are resolved. Unknown providers must be passed through unchanged, never removed.
No TypeScript — Source is plain JavaScript (ES modules via Babel). Do not add TypeScript without consensus.
dist/ is generated — Never edit files in dist/. Always run npm run build to regenerate.
CHANGELOG.md is generated — Managed by semantic-release. Never edit manually.
Conventional Commits required — Commitlint enforces conventional commit format. Non-conforming commits will be rejected by the pre-commit hook.

Key Conventions

Commit format: Conventional Commits enforced by commitlint + Husky pre-commit hook
Branch strategy: master (production) + feature branches; beta and dev for pre-releases
Test location: test/unit/ with Mocha + Chai
Module system: Dual CJS + ESM (source is ESM, Babel outputs both)
Formatting: Prettier (120 chars, no semicolons, single quotes)

Read the full file on GitHub · 52 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 · 52 lines · 666 tokens per session scan A 32f9c59d9a60

Subscribe to this mod's changes

contentful-resolve-response AGENTS.md is an instructions file published in the GitHub repository contentful/contentful-resolve-response (57 stars, last pushed 10d ago), licensed MIT. It adds 666 tokens to every session, about $0.0027 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.

contentful-resolve-response AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
contentful-resolve-response AGENTS.mdcontentful/contentful-resolve-response	Instructions file	57	10d ago	MIT	A	666	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	yesterday	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

contentful-resolve-response: Instructions file for Codex