Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Multi-model debate with named dissent, plus decision provenance queries for AI coding work.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
Pick the AI app you use, then copy the settings.
E3D_MCP_MAX_ROUNDS, E3D_MCP_MAX_PROVIDERS, E3D_MCP_MAX_CONCURRENT, E3D_MCP_TIMEOUT_SECYou need
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": {
"e3d-pilot": {
"command": "npx",
"args": [
"-y",
"e3d-pilot"
],
"env": {
"E3D_MCP_MAX_ROUNDS": "your-value",
"E3D_MCP_MAX_PROVIDERS": "your-value",
"E3D_MCP_MAX_CONCURRENT": "your-value",
"E3D_MCP_TIMEOUT_SEC": "your-value"
}
}
}
}Run this in your terminal
claude mcp add e3d-pilot --env E3D_MCP_MAX_ROUNDS=your-value --env E3D_MCP_MAX_PROVIDERS=your-value --env E3D_MCP_MAX_CONCURRENT=your-value --env E3D_MCP_TIMEOUT_SEC=your-value -- npx -y e3d-pilotFill in the empty values before running it.
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"e3d-pilot": {
"command": "npx",
"args": [
"-y",
"e3d-pilot"
],
"env": {
"E3D_MCP_MAX_ROUNDS": "your-value",
"E3D_MCP_MAX_PROVIDERS": "your-value",
"E3D_MCP_MAX_CONCURRENT": "your-value",
"E3D_MCP_TIMEOUT_SEC": "your-value"
}
}
}
}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.
Paste into .vscode/mcp.json in your project
{
"servers": {
"e3d-pilot": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"e3d-pilot"
],
"env": {
"E3D_MCP_MAX_ROUNDS": "your-value",
"E3D_MCP_MAX_PROVIDERS": "your-value",
"E3D_MCP_MAX_CONCURRENT": "your-value",
"E3D_MCP_TIMEOUT_SEC": "your-value"
}
}
}
}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.
E3D_MCP_MAX_ROUNDS envE3D_MCP_MAX_PROVIDERS envE3D_MCP_MAX_CONCURRENT envE3D_MCP_TIMEOUT_SEC envThese settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Runs on your computer; the tool list appears in your AI app after you install it.
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 6, 2026
The registry name was verified with the GitHub account spacepacket1, which owns the repo
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
This one runs on your computer; there is no internet endpoint
Runs on your computer and uses local settings instead
Runs on your computer; we can only read tool lists from internet endpoints
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
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.
The registry does not list a required key, though some servers ask you to sign in on first use.
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).
The GitHub repo last changed –, and the latest version (0.2.0) reached the registry 19 days ago.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.
In the same category: Spec Driven Development, Remote Desktop Commander, FOGA node
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
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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.
Multi-model AI problem solving: independent answers → critique → convergence → human decision → execution → review → provenance.
e3d-pilot is an open-source system for getting multiple AI models to work on the same problem instead of trusting a single model's answer — from a one-off question to a fully executed, human-gated software change.
It starts simply. Ask several configured models (Claude, Codex, Grok, Devin, or others you wire in) the same question. Let them answer independently, see and critique each other's positions, revise, expose real dissent, and converge on the strongest answer. That's bin/e3d-debate — a standalone tool, no repo or pipeline required. It's also available inside your editor as an MCP server: use it from GitHub Copilot, Claude Code, or Cursor with one npx line.
Then e3d-pilot takes the same instinct further, into real software work: discover → ideate → approve → draft → negotiate → execute → review → publish → outcome. Every step is preserved in an append-only ledger, so the system (or a human, or a fresh AI session) can later reconstruct where an idea came from, which models or people influenced it, what it produced, and what happened afterward.
git clone https://github.com/spacepacket1/e3d-pilot.git
cd e3d-pilot
bin/e3d-debate \ "Should e3d-pilot's provenance data be a graph, or is that over-engineering?" \ --providers claude,codex --rounds 3
(Any lib/providers/ adapter can join — add devin/grok-build/others if you have them configured; claude/codex are the two most people trying this will already have.)
Round 1: every provider answers independently. Round 2+: each sees the others' prior-round positions and must defend, revise, rebut, or concede. The debate stops early if they genuinely converge; a synthesizer then reads the full transcript and reports a final answer, consensus, and any remaining dissent.
That question isn't hypothetical — it's a real debate we ran this way, condensed from the full transcript:
QUESTION
Should the E3D 3D graph generalize into a standalone product, or should e3d-pilot instrument its own provenance instead?
CLAUDE (round 3, the only one to formally reach "approved") Don't create e3d-graph yet — build a confidence-annotated, domain-neutral provenance emitter inside e3d-pilot, prove attribution questions are answerable from the data alone, add a 2D lens only if they are, and extract a public repo only on external pull or paid demand.
CODEX (round 3) Build outcome-linked Pilot provenance first, then open-source a narrow standalone viewer only if measured workflow value and external pull justify extraction.
DEVIN (round 3) Instrument Pilot with a domain-neutral provenance schema from day one; gate public extraction on the internal experiment succeeding, not on indefinite deferral.
GROK-BUILD (round 3) Do not ship standalone e3d-graph; instrument Pilot provenance first and treat visualization as a 2D lens inside E3D.
SYNTHESIS Do not ship a standalone e3d-graph product. Instrument e3d-pilot now with an append-only, domain-neutral, confidence-annotated provenance schema — the ledger stays canonical, the graph is an index, not memory. Validate by answering real attribution questions from the data alone before any UI.
DISSENT (reported, not hidden) Devin and partly Codex would gate public extraction on the internal experiment succeeding; Claude and Grok-build require external pull or paid demand instead — a real, named disagreement the tool didn't paper over.
What happened next: we built exactly that, then ran it against three real ideas in this repo's own history. All three came back "more useful than reading the raw ledger by hand" — and one of them caught a real error in the spec that proposed it. Later graph-intelligence queries were evaluated just as honestly: one clear win, two explicitly "no signal" because the real data was still too sparse — reported as-is, not oversold. That full arc (spec, dogfood results, the honest misses) is in docs/provenance-graph-experiment.md and docs/graph-intelligence-experiment.md.
Experimental: the provenance graph. e3d-pilot now derives structural relationships — ideas, actors, models, decisions, repos, commits, evidence, outcomes — from its own immutable event ledger. We're testing whether that graph reveals patterns that are genuinely hard to get from the raw ledger, not claiming it already does.
You don't need the rest of e3d-pilot to use e3d-debate on its own — see e3d-debate below for the full flag reference. Keep reading for the part that takes a debate's answer all the way to a shipped, reviewed, provenance-tracked change.
e3d-mcp is a zero-dependency Model Context Protocol server. It lets an AI coding assistant ask for a multi-model second opinion mid-task, instead of committing to the first answer one model gives it. It's published on npm as e3d-pilot and listed in the official MCP registry as io.github.spacepacket1/e3d-pilot.
| Tool | What it does |
|---|---|
e3d_debate | Several independent models answer and a synthesizer returns a decisive answer, a consensus level (full / majority / split), any named dissent, and each model's final position, as both readable text and structured data (dissent.present, dissent.summary, positions). mode: "quick" (default) is one round and takes seconds; mode: "thorough" adds a critique round where models rebut each other. The full transcript is opt-in (include_transcript). |
e3d_quote | Hosted per-token servers only. Free and read-only: prices an e3d_debate (same arguments) and returns quote_id, max_credits, expires_at and your key's limits; nothing is held or spent. See Agents. |
e3d_list_providers | Shows which model providers are available on this machine. A debate needs at least two. |
e3d_provenance_trace | Read-only: traces why a change exists, from its origin through debates, approvals, execution, review, and outcome. |
e3d_ideas_list | Read-only: lists the ideas e3d-pilot tracks in a repo, to find an id for the trace. |
e3d_gallery | Opt-in (E3D_MCP_GALLERY=1; on at pilot.e3d.ai). Free and read-only: searches and reads the public Pilot Gallery, the debates people chose to publish, and returns the question, answer, consensus and any dissent with a link. Nothing is spent or written. |
e3d_list_experts, e3d_get_expert | Opt-in (E3D_MCP_EXPERTS=1). Free and read-only: describe the built-in experts and presets, and show the exact lens text a seat receives. They only describe: passing skills through the e3d_debate tool is not built. |
A real result in quick mode (11 seconds, two models), from asking whether a small CLI should default to a flat JSON file or SQLite:
FINAL ANSWER: Default to a flat JSON file for a small CLI. It has no dependencies, is
human-readable and diffable, and is easy to hand-edit and debug. Write it atomically (temp file, then rename). Move to SQLite once you need indexed queries, concurrent writers, or data beyond a few MB. CONSENSUS: split DISSENT: Codex prefers SQLite as the default for any persistent mutable state because it gives transactions, concurrency safety, and schema evolution at low cost.
The disagreement is the point: you get the answer and the strongest case against it, instead of one model's confident guess.
VS Code (GitHub Copilot agent mode): one-click install, or add this to .vscode/mcp.json:
{
"servers": { "e3d-pilot": { "type": "stdio", "command": "npx", "args": ["-y", "--no-update-notifier", "-p", "e3d-pilot", "e3d-mcp"] } } }
Claude Code:
claude mcp add e3d-pilot -- npx -y --no-update-notifier -p e3d-pilot e3d-mcp
Cursor (~/.cursor/mcp.json) and other clients that use the mcpServers shape:
{ "mcpServers": { "e3d-pilot": { "command": "npx", "args": ["-y", "--no-update-notifier", "-p", "e3d-pilot", "e3d-mcp"] } } }
Any MCP client that can launch a stdio server should work; the shapes above are each client's standard format.
Prerequisites: Node 18+, jq, bash 4+ (macOS ships 3.2: brew install bash jq), and at least two model CLIs logged in (e.g. claude and codex). Check them all at once:
npx -y -p e3d-pilot e3d-mcp --doctor
--doctor reports what's missing and how to fix it. It does not need the full pipeline's e3d-code executor (it only notes whether that is installed). From a clone, bin/e3d-mcp --print-config --local prints a config that points at your checkout.
In Copilot agent mode (or any client), ask: *"Before you pick a storage layer, run e3d_debate on SQLite vs flat JSON for this CLI."* To make the assistant do this unprompted for contestable design choices, copy examples/copilot-instructions.md into .github/copilot-instructions.md or AGENTS.md. Don't use it for lookups or questions with an obvious answer; it is slow and costs money.
quick debates take seconds to a minute and thorough ones a few minutes; both spend your model credits. The server caps e3d_debate with E3D_MCP_MAX_ROUNDS (3), E3D_MCP_MAX_PROVIDERS (4), E3D_MCP_MAX_CONCURRENT (2), and E3D_MCP_TIMEOUT_SEC (900). When every slot is busy a call waits its turn, first in and first out, for up to E3D_MCP_QUEUE_WAIT_SEC (90); e3d_debate_start queues without holding the call.e3d-pilot providers list).Every debate prompt states today's UTC date. The API providers (anthropic-api, openai-api, gemini-api, xai-api) can also use their vendor's own web search tool in the debate rounds. It is on by default, and the question text may then be sent to a search provider. CLI voices, MCP-sampling voices and the synthesizer never search; they are told they have no web access. Pass web_search: false to e3d_debate or e3d_debate_start, or --web-search off to e3d-debate, to turn it off for one debate. Search results are treated as untrusted data: see docs/web-search-providers.md for what each vendor allows and what risk remains, and docs/web-search-interface.md for the result shapes.
| Variable | Default | Effect |
|---|---|---|
E3D_DEBATE_WEB_SEARCH | on | off is the kill switch: no search anywhere, no code change needed. Any other value also turns search off. |
E3D_DEBATE_WEB_SEARCH_PROVIDERS | anthropic-api,openai-api,gemini-api,xai-api | Which providers may search. Names other than these four are ignored. |
| E3D_DEBATE_SEARCH_MAX_PER_CALL | 3 (1-10) | Search cap per model call. It is native for Anthropic a
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