What is mcp-harmonyos AGENTS.md?

A contributor guide for an MCP server that lets AI assistants work with HarmonyOS projects, devices, and apps through Huawei’s hdc command-line tool. It covers the Node.js and TypeScript project setup, commands, testing, and code layout.

Use it when changing the server, building or running it, testing its JSON-RPC tools, or navigating its source files.

It gives coding agents the repository’s build, run, and manual test instructions in one place. It also records that no linter, formatter, CI pipeline, or test framework is configured.

How FadingLight9291117/mcp-harmonyos configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to FadingLight9291117/mcp-harmonyos. 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/FadingLight9291117/mcp-harmonyos/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/FadingLight9291117/mcp-harmonyos

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/fadinglight9291117/mcp-harmonyos/agents-md/github.svg)](https://agentmods.dev/instructions/fadinglight9291117/mcp-harmonyos/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/fadinglight9291117/mcp-harmonyos/agents-md"><img src="https://agentmods.dev/badge/instructions/fadinglight9291117/mcp-harmonyos/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/fadinglight9291117/mcp-harmonyos/agents-md"><img src="https://agentmods.dev/badge/instructions/fadinglight9291117/mcp-harmonyos/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,501 This file is loaded in full into every session.

When invoked 1,501 The same file — it is already loaded in full.

Security scan A 1 finding. 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	$0.01501	$0.01501
Opus 5.5	$0.00600	$0.00600
Sonnet 5.5	$0.00300	$0.00300
Haiku 4.5	$0.00150	$0.00150

Measured 1mo ago against content hash d6f52ada225e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-harmonyos AGENTS.md scanned grade A with 1 finding 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

hdc.ts # hdcExec() - wraps execSync for hdc commands

AGENTS.md · 157 lines

How it starts

The opening of the file, as written. The whole thing — 157 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guide for AI coding agents working in the mcp-harmonyos repository.

Project Overview

MCP (Model Context Protocol) server for HarmonyOS development. Enables AI assistants to interact with HarmonyOS projects, devices, and applications via the hdc CLI tool.

Runtime: Node.js (ESM, "type": "module")
Language: TypeScript (strict mode, noImplicitAny: false)
Dependencies: @modelcontextprotocol/sdk, zod, dotenv

Build / Run Commands

npm install           # Install dependencies
npm run build         # Compile src/ to build/ via tsc (adds shebang)
npm start             # Start the built server (stdio transport)
npm run dev           # Build + run in one step

Testing

No test framework. Manual test script only:

npm run build && node test/test-tools.mjs

The test script spawns the server as a child process, sends JSON-RPC requests over stdin, and parses responses from stdout. It tests against a hardcoded local project path -- update the path in test/test-tools.mjs before running.

Linting / Formatting

No linter or formatter is configured. No CI/CD pipeline. Follow conventions below.

Project Structure

src/
  server.ts                  # Server class, handler registration, auto-dispatch
  tools/
    index.ts                 # Aggregates all tools, wraps with error handling
    devices.ts               # harmonyos_list_devices, harmonyos_get_device_info
    projects.ts              # harmonyos_get_project_info, harmonyos_list_modules
    apps.ts                  # harmonyos_list_installed_apps, harmonyos_get_app_info
    build.ts                 # harmonyos_check_build_outputs
  types/
    tool.ts                  # ToolEntry, ToolDefinition<T>, ToolResponse interfaces
    harmonyos-types.ts       # Domain interfaces (ProjectInfo, ModuleInfo, etc.)
  utils/
    hdc.ts                   # hdcExec() - wraps execSync for hdc commands
    json5.ts                 # parseJson5() - strips comments/trailing commas
    response.ts              # toolResult(), toolError(), wrapTool() helpers
test/
  test-tools.mjs             # Manual integration test script
build/                       # Compiled output (gitignored)

Read the full file on GitHub · 157 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 First seen · 157 lines · 1,501 tokens per session scan A d6f52ada225e

Subscribe to this mod's changes

mcp-harmonyos AGENTS.md is an instructions file published in the GitHub repository FadingLight9291117/mcp-harmonyos (2 stars, last pushed 4mo ago), licensed MIT. It adds 1,501 tokens to every session, about $0.0060 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Mobile

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

mcp-harmonyos: Instructions file for Codex