Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer
Osmcp
Overview
Description from the maker (original English)
A typed, policy-controlled OS capability layer for AI agents.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiVery new★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs on your computer
- Transport: stdio
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- The registry lists no key to fill in.
You need
- DockerDocker installed
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json
{
"mcpServers": {
"osmcp": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"ghcr.io/krushnavardhanreddy/osmcp:latest"
]
}
}
}Run this in your terminal
claude mcp add osmcp -- docker run -i --rm ghcr.io/krushnavardhanreddy/osmcp:latestOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"osmcp": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"ghcr.io/krushnavardhanreddy/osmcp:latest"
]
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"osmcp": {
"type": "stdio",
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"ghcr.io/krushnavardhanreddy/osmcp:latest"
]
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account KrushnaVardhanReddy, which owns the repo
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- – Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Otheri
- More stars than 0% of the other 18475 servers in this category
- Published to the registry more recently than 21% of the other 18475 servers in this category
- Basic checks equal to or better than 100% of the other 18475 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Osmcp safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.5) reached the registry 3 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Docker on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, Tethered Trust
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Remote Desktop Commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud✓ desktopcommander.app
Tethered Trust
Fit, compatibility and recall checks for AI agents before they buy: verdicts, evidence, receipts.
Runs in the cloud✓ tetheredtrust.com
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
osmcp — OS Capabilities for AI Agents
A typed, policy-controlled OS capability layer for AI agents via the Model Context Protocol (MCP).
osmcp exposes a curated set of safe filesystem, git, and text-processing tools to AI agents — all governed by a strict Policy Engine that enforces path boundaries, tool allowlists, output limits, mutation controls, and an immutable audit trail.
📖 Read the comprehensive [Architecture & Design Document](docs/ARCHITECTURE.md) for a deep dive into the philosophy, safety boundaries, and design decisions behind osmcp.
Features
| Category | Tools | Phase |
|---|---|---|
| 🔍 Search | grep, find | 1 |
| 📁 File Inspection | ls, cat, stat, wc, head, tail | 1 |
| 🌳 Filesystem | tree, du | 1 |
| 🔀 Git Intelligence | git_status, git_diff, git_log | 1 |
| 🔧 Transform | jq, sed, diff | 1 |
| ✍️ File Mutation | write_file, append_file, mkdir, rm, mv, cp, patch | 2 |
| 🚀 Git Mutation | git_add, git_commit, git_checkout, git_branch, git_pull, git_push | 2 |
Architecture
AI Agent (Claude, GPT, etc.)│ MCP JSON-RPC (stdio) ▼ osmcp binary ├── Policy Engine ← enforces allowed_root, allowed_tools, limits ├── Audit Logger ← append-only NDJSON log of every invocation ├── Tool Registry ← self-registering tools via RegisterMCP() └── Envelope Builder ← typed {ok, data, error, meta} responses
Demo
*A demonstration of Claude Desktop securely editing code via osmcp, safely bounded by a TOML policy engine.*
Quick Start
1. Install via Homebrew
brew tap KrushnaVardhanReddy/tapbrew install osmcp
*Alternatively, build from source:*
make buildBinary: bin/osmcp
2. Configure a Policy
# policy.toml[policy] allowed_root = "/home/user/myproject" allowed_tools = ["grep", "ls", "cat", "git_status", "git_log"] allow_mutation = false
[limits] timeout_ms = 5000 max_output_bytes = 1048576 max_matches = 100
[audit] destination = "stderr" # or "file" path = "/var/log/osmcp-audit.ndjson"
3. Run
bin/osmcp --policy policy.tomlThe binary communicates over stdio using MCP JSON-RPC. Connect any MCP-compatible client.
Client Integrations
Claude Desktop
Add the following to your claude_desktop_config.json:
{"mcpServers": { "osmcp": { "command": "osmcp", "args": ["--policy", "/absolute/path/to/policy.toml"] } } }
Smithery (npx)
To install osmcp for Claude Desktop automatically via Smithery:
npx @smithery/cli install osmcpLiteLLM
Integrate osmcp into your enterprise LLM proxy using the LiteLLM MCP Gateway.
5. Test
make test # unit testsmake e2e # end-to-end tests against real binary make lint # golangci-lint
Policy Security Model
- `allowed_root` — All filesystem paths are validated to be inside this root. Traversal outside is blocked with
POLICY_DENIED. - `allowed_tools` — Only tools in this list are visible to the MCP client. Unlisted tools do not appear in
tools/list. - `allow_mutation` — When
false, mutating tools (write, delete, git commit) are globally blocked. - Limits — Per-invocation timeout, output byte cap, and match count cap prevent runaway operations.
Envelope Response Format
All tool responses follow a consistent typed envelope:
{"ok": true, "tool": "grep", "data": { ... }, "error": null, "meta": { "execution_time_ms": 12, "truncated": false } }
License
MIT
Acknowledgements
osmcp would not be possible without the incredible open-source libraries it is built upon: