Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer
LEEVAR reliability battery
Overview
Description from the maker (original English)
Grade an AI agent's transcripts on 18 reliability tests. Thin evidence is NOT TESTED, not guessed.
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.
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Download the maker’s .mcpb file
The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.
Run this in your terminal
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.
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 forevercrab321-svg, 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 18613 servers in this category
- Published to the registry more recently than 53% of the other 18613 servers in this category
- Basic checks equal to or better than 100% of the other 18613 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 LEEVAR reliability battery 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 (0.1.0) reached the registry 42 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need MCPB on your computer.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, DECIDE: Migration Discovery Risk Review
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
DECIDE: Migration Discovery Risk Review
Run after each discovery iteration to see what's still uncertain, who to ask next, and what changed.
Runs in the cloud
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.
leevar-mcp
The LEEVAR reliability battery as an MCP server. Ask Claude, Cursor or any MCP client to grade an AI agent's conversations on 18 reliability tests, without leaving the editor.
It does not grade anything itself and it never fills a gap with a guess. A dimension your samples cannot evidence comes back NOT TESTED, and below 13 of 18 evidenced tests no grade is issued at all — the tool says so instead of printing a letter.
Tools
| Tool | What it does |
|---|---|
leevar_scan_transcript | Sends 1–8 real conversation samples to the hosted battery. Returns a scan id. Free: 5 scans a month per email, no account. |
leevar_scan_status | Reads the result: status, grade (only when one was issued), coverage, and the written report. |
leevar_battery | Lists the 18 tests — what each checks and the failure it catches — so you can pick samples that exercise them. |
Install
Node 18 or later. The package is installed straight from the v0.1.0 release; it is not on the npm registry yet.
Claude Desktop (claude_desktop_config.json) or Cursor (.cursor/mcp.json):
{"mcpServers": { "leevar": { "command": "npx", "args": ["-y", "https://github.com/forevercrab321-svg/leevar-battery/releases/download/v0.1.0/leevar-mcp-0.1.0.tgz"] } } }
Claude Code:
claude mcp add leevar -- npx -y https://github.com/forevercrab321-svg/leevar-battery/releases/download/v0.1.0/leevar-mcp-0.1.0.tgzFrom source instead: clone this repository, run npm install in packages/mcp, and point your client at node /packages/mcp/index.mjs.
Then ask, for example: *"List the LEEVAR battery, pick three of my support bot's conversations that cover it, and scan them."*
Your data
Samples go to LEEVAR's hosted service, are graded there by third-party language models (named on the privacy page), and are deleted 30 days after the scan completes. Each scan uses one of the email's 5 free monthly scans. Strip API keys, credentials and personal data before sending. The tool descriptions tell the assistant to ask you before it sends anything.
To grade entirely on your own machine with a model you choose, use the scanner in the root of this repository instead (deno task scan) — nothing leaves your machine except the calls to your own model provider.
Reading a result
- Grade issued —
Grade: B (composite 81.2)with the coverage it was computed on. Gate on coverage as well as the letter. - No grade — the samples did not evidence enough of the battery. Send longer, real conversations that exercise the missing behaviours: a long thread for context, a repeated task for consistency, a tool failure for recovery. A reference average may be shown; it is not a verdict.
- Failed — the reason, whose fault it was, and whether a retry makes sense. If the fault is LEEVAR's, the free scan is credited back.
Develop
npm installnpm test # all requests go to local fakes; no free scans are spent npm run gen # regenerate battery.json from packages/scanner-core (Deno)
LEEVAR_API_URL overrides the endpoint (the tests use it to point at a local stub).
MIT.