What is plex-mcp AGENTS.md?

A project instruction file for plex-mcp, a server that lets an AI assistant work with Plex Media Server, which organizes and streams personal media.

It guides work on the Plex server, its HTTP connections, Docker setup, and automated tests.

It gives coding agents the project's current status, technology choices, file layout, and development rules in one place.

How CarlDog/plex-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to CarlDog/plex-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/CarlDog/plex-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/CarlDog/plex-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/carldog/plex-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/carldog/plex-mcp/agents-md)

Your own site

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

Per session 1,995 This file is loaded in full into every session.

When invoked 1,995 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	$0.01995	$0.01995
Opus 5.5	$0.00798	$0.00798
Sonnet 5.5	$0.00399	$0.00399
Haiku 4.5	$0.00199	$0.00199

Measured 2mo ago against content hash a5991492533d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

plex-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 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

plex-mcp CLAUDE.md — 86% identical, 51 lines differ

AGENTS.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

plex-mcp

MCP server for Plex Media Server, packaged as a Docker container.

Fleet standards: ts-mcp-server v1.0 — audited 2026-07-25

Status

Single source of truth: STATUS.md. Do not duplicate status into this file, MEMORY.md, or Serena memories — reference STATUS.md.

Current Sprint

See STATUS.md for the active phase, what's done, and what's next.

Stack

TypeScript (Node 22+, ESM, NodeNext module resolution)
@modelcontextprotocol/sdk (high-level McpServer API)
zod for tool input schemas
Plex HTTP API via fetch (no Plex SDK dependency)
Docker multi-stage build (alpine, non-root)

Layout

src/index.ts — MCP server entry. Decides transport based on MCP_PORT.
src/mcp-route.ts — the Streamable HTTP /mcp route: Host/Origin allowlist, per-session transport map, idle sweep, session dispatch. Split out of index.ts so it can be imported by a test — index.ts self-executes on import, so nothing in it was reachable without booting a server. Covered by tests/mcp-route.test.ts.
src/plex.ts — Plex HTTP API client.
src/tautulli.ts — optional direct Tautulli HTTP client, fail-soft config, normalized privacy-allowlisted response types.
src/log.ts — small structured logger (stderr, level-gated via LOG_LEVEL env var). See README for format and levels.
src/tools/ — tool registrations split per domain (discovery.ts, sessions.ts, playback.ts, playlists.ts, hubs.ts, admin.ts, images.ts, diagnostics.ts, tautulli.ts). index.ts orchestrates via registerTools(server, plex, tautulli); helpers.ts holds shared utilities (asText, withLogging).
Dockerfile — multi-stage build for the runtime image.
docker-compose.yml — Compose/Portainer deployment using HTTP transport.
docs/PLEX-API.md — curated reference for the Plex HTTP API: external doc links, gotchas we've hit (pagination pairing, /:/scrobble empty responses, type integer codes), and rough endpoint shapes for capabilities we haven't built yet. Read this before adding new tools.
docs/CHATGPT-APPS-SDK.md — future-work spec for making plex-mcp consumable from a ChatGPT account (OAuth 2.1 protected-resource setup, tool annotation hints, optional UI widgets, infrastructure choices). Not started; phased plan inside.
.githooks/pre-commit — gitleaks + PII pattern scan.
.gitleaks.toml — secret-scanning config.

Read the full file on GitHub · 171 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 · 171 lines · 1,995 tokens per session scan A a5991492533d

Subscribe to this mod's changes

plex-mcp AGENTS.md is an instructions file published in the GitHub repository CarlDog/plex-mcp (1 stars, last pushed 4d ago), licensed MIT. It adds 1,995 tokens to every session, about $0.0080 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.

plex-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
plex-mcp AGENTS.mdCarlDog/plex-mcp	Instructions file	1	4d ago	MIT	A	1,995	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

plex-mcp: Instructions file for Codex