What is frontier-mcp AGENTS.md?

Repository-wide instructions for FrontierMCP, an MCP server that exposes Markdown issues as a searchable graph for coding agents.

It guides agents working on the server, its tools, its issue-tracking integration, and related documentation.

It explains the project’s purpose, terminology, ownership, editing rules, and required instructions so changes follow the repository’s working contract.

How 51ck/frontier-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to 51ck/frontier-mcp. 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/51ck/frontier-mcp/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/51ck/frontier-mcp

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/51ck/frontier-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/51ck/frontier-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/51ck/frontier-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/51ck/frontier-mcp/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/51ck/frontier-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/51ck/frontier-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 9,903 This file is loaded in full into every session.

When invoked 9,903 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	$0.09903	$0.09903
Opus 5.5	$0.03961	$0.03961
Sonnet 5.5	$0.01981	$0.01981
Haiku 4.5	$0.00990	$0.00990

Measured 1mo ago against content hash 90930e85703d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

frontier-mcp 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 1mo 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 · 562 lines

How it starts

The opening of the file, as written. The whole thing — 562 lines — stays where its author put it; the contents beside it link to each section on GitHub.

FrontierMCP

The product is FrontierMCP; "Frontier" alone always means the set of takeable Tickets. MCP server name frontier; npm package frontier-mcp; tools namespaced mcp__frontier__*.

This repository runs on the DOX framework — the AGENTS.md hierarchy defined below. This file is the DOX rail: project-wide instructions, durable workflow rules, and the top-level Child DOX Index.

Purpose

An MCP server exposing the markdown issue tracker under a repo's .scratch/ as a queryable graph, so agents stop re-parsing prose to find what is open, blocked, or takeable. Serves the engineering skills (/to-tickets, /wayfinder, /triage, /to-spec, /implement) without forking them.

Vocabulary is defined in CONTEXT.md and is binding on code, tools, and docs.

Ownership

Root owns the application, tracker, and project configuration. The children .agents/skills/AGENTS.md and scripts/AGENTS.md own installed upstream skills and runtime/setup scripts respectively.

Core Contract

AGENTS.md files are binding work contracts for their subtrees
Work products, source materials, instructions, records, assets, and durable docs must stay understandable from the nearest applicable AGENTS.md plus every parent AGENTS.md above it

Read Before Editing

Read the root AGENTS.md
Identify every file or folder you expect to touch
Walk from the repository root to each target path
Read every AGENTS.md found along each route
If a parent AGENTS.md lists a child AGENTS.md whose scope contains the path, read that child and continue from there
Use the nearest AGENTS.md as the local contract and parent docs for repo-wide rules
If docs conflict, the closer doc controls local work details, but no child doc may weaken DOX

Do not rely on memory. Re-read the applicable DOX chain in the current session before editing.

Update After Editing

Every meaningful change requires a DOX pass before the task is done.

Read the full file on GitHub · 562 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.

1mo ago Changed · +47 lines · +990 tokens per session 90930e85703d
2mo ago First seen · 515 lines · 8,913 tokens per session scan A 20dd0e363142

Subscribe to this mod's changes

frontier-mcp AGENTS.md is an instructions file published in the GitHub repository 51ck/frontier-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 9,903 tokens to every session, about $0.0396 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.

frontier-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
frontier-mcp AGENTS.md51ck/frontier-mcp	Instructions file	0	1mo ago	MIT	A	9,903	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

frontier-mcp: Instructions file for Codex