Capsule

Name: Capsule
Author: dawitlabs

by dawitlabsversion 0.3.3i★ –iRuns on your computer

Registry nameio.github.dawitlabs/capsule

Install

Overview

Description from the maker (original English)

Compact, source-linked context packs that reduce token waste for coding 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
UsageiNot measured yet★ –

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

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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": {
    "capsule": {
      "command": "npx",
      "args": [
        "-y",
        "capsulectx"
      ]
    }
  }
}

Run this in your terminal

claude mcp add capsule -- npx -y capsulectx

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "capsule": {
      "command": "npx",
      "args": [
        "-y",
        "capsulectx"
      ]
    }
  }
}

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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "capsule": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "capsulectx"
      ]
    }
  }
}

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 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account dawitlabs, 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 32568 servers in this category
Published to the registry more recently than 14% of the other 32568 servers in this category
Basic checks equal to or better than 100% of the other 32568 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 Capsule 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 (0.3.3) reached the registry 4 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, FlyDocs

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

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Remote Desktop Commander

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Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday

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FlyDocs

by flydocs.ai

Spec-driven development workflow: your agent works issues, sessions and the status lifecycle.

Runs on your computerUpdated today

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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.

Capsule

Compact, source-linked context packs for coding agents.

Docs · Quickstart · Commands

MCP gives agents tools. Skills give agents procedures. Capsules give agents compact project context.

Large repositories make coding agents burn tokens rediscovering the same files, decisions, conventions, and setup details over and over. Capsule targets a 50–70% reduction in repeated repository-discovery context for large, multi-session agent work.

Install

No install required — run directly with npx (always gets the latest version):

npx capsulectx init

Or install globally with your package manager:

# npm

npm install -g capsulectx

pnpm

pnpm add -g capsulectx

yarn

yarn global add capsulectx

bun

bun add -g capsulectx

Keep it up to date:

npm install -g capsulectx --prefer-online

Tip: npx is the easiest option — it always runs the latest published version with no manual update step.

Quickstart

npx capsulectx init

Capsule scans your repo, optionally enriches capsules with AI (using your installed Claude CLI, API keys, or a generated prompt for any browser-based AI), and creates:

.capsules/

index.md architecture.md setup.md api.md data.md ui.md testing.md deployment.md

Each capsule is a Markdown file with source fingerprints in JSON frontmatter:

---json

{ "name": "api", "sources": ["src/api/**"], "fingerprints": { "src/api/users.ts": "sha256:..." }, "updated_at": "2026-06-20T14:00:00.000Z" }

API Capsule

Purpose

Request handlers, routes, controllers, and service boundaries.

Key Files

src/api/users.ts: source file matched by this capsule.

Decisions

Record stable decisions here so future agents do not rediscover them.

Agents read .capsules/index.md, choose the relevant capsule, check staleness, then inspect only the source files that actually matter.

Commands

Command	What it does
`capsule init`	Scan repo, run AI enrichment (optional), write all capsules
`capsule enrich`	Re-run AI enrichment on existing capsules
`capsule apply`	Apply AI-generated JSON to capsule Conventions and Decisions
`capsule write`	Refresh one capsule from source (preserves your edits)
`capsule refresh`	Explicitly refresh one capsule
`capsule refresh --all`	Explicitly refresh all detected capsules
`capsule get`	Print one capsule to stdout
`capsule scan`	Print detected source groups without writing
`capsule stale [name]`	Check which source files changed since last write
`capsule estimate`	Show estimated token savings for one capsule
`capsule stats`	Show token savings across all capsules
`capsule report [name]`	Show reproducible source/capsule/stale token savings
`capsule report --write`	Write `.capsules/report.md` as a proof artifact
`capsule check`	CI-friendly freshness/config check; exits nonzero on stale or missing capsules
`capsule --mcp`	Start MCP server for native agent integration

MCP Server

Capsule ships an MCP server so Claude Code and other MCP-compatible agents can natively discover and consume capsules — no manual file reads needed.

Add to your project's `.claude/settings.json`:

"mcpServers": { "capsule": { "command": "npx", "args": ["capsulectx", "--mcp"] } } }

Or globally in `~/.claude/settings.json` to enable for all projects.

Once configured, agents get these tools automatically:

Tool	What it does
`capsule_list`	List all capsules with freshness status
`capsule_get`	Read a capsule's compressed context; warns when stale but does not write
`capsule_refresh`	Explicitly refresh one capsule or all capsules
`capsule_stale`	Check which capsules have outdated sources
`capsule_stats`	Show token savings per capsule
`capsule_report`	Show machine-readable discovery-savings proof
`capsule_check`	CI-style stale/missing/config check
`capsule_init`	Generate capsules for the current repo

Capsules are also available as MCP resources at capsule:///index and capsule:///{name}.

Seeing the savings

$ capsule report architecture

Capsule: architecture

capsule status source capsule stale saved architecture fresh 9,607 417 0 96%

Token counts use the cl100k_base tokenizer for accurate measurement.

For CI, run:

npx capsulectx check

It exits nonzero when capsules are stale, missing, or blocked by invalid config.

Agent Workflow

Add this to AGENTS.md, CLAUDE.md, Cursor rules, or your agent instructions:

Before working in this repo:

Read .capsules/index.md if it exists.
Read the capsule matching the task area.
Run capsule stale when the CLI is available.
If stale, inspect changed source files before editing.
Update capsules when durable project knowledge changes.

Works with any agent that can read files — Claude Code, Codex, Cursor, Windsurf, Devin, custom MCP agents.

Custom Groups

Capsule detects standard layouts out of the box. For non-standard structure, add .capsules/config.json:

"groups": [ { "name": "workers", "description": "Background jobs, queues, and scheduled tasks.", "sources": ["src/workers/", "src/jobs/"] } ], "ignore": ["legacy/**"] }

A groups entry with the same name as a default group overrides it. New names are appended. ignore patterns extend the default ignore list.

See docs/capsule-format.md for the public capsule file format.

Building the Demo

The animation in this README is a generated GIF — no screen-recording tools required.

npm run demo

Requires rsvg-convert (librsvg / librsvg2-tools) and ffmpeg. The script outputs docs/demo.gif from SVG frames rendered at 2× for retina. See scripts/build-demo.mjs.

Documentation Site

The OSS docs live in docs-site/ and are built with VitePress.

npm run docs:dev

npm run docs:build

Status

Capsule is early but functional. Current capabilities:

Language-agnostic repo scanning with monorepo support (Turborepo, pnpm workspaces)
Static analysis: framework detection, table/model extraction, route detection, env vars
AI enrichment on init — launches your installed Claude CLI, calls Claude/OpenAI API, or generates a prompt for any browser-based AI (Claude.ai, ChatGPT, Cursor, Windsurf)
Write-safe re-generation: human edits to Conventions and Decisions are preserved on refresh
MCP server for native Claude Code / agent integration
Real token counting (cl100k_base) with savings dashboard
TypeScript API surface extraction
Binary file filtering
Stale detection and token savings estimation
Reproducible report and CI-friendly check
Custom group config via .capsules/config.json
Auto-patches CLAUDE.md, AGENTS.md, .cursorrules, .windsurfrules with capsule instructions

Roadmap:

smarter write that diffs source changes and suggests targeted updates
before/after token reports for real agent sessions
GitHub Action wrapper for capsule check

Install for Local Development

git clone https://github.com/dawitlabs/capsule.git

cd capsule npm install npm run build node dist/cli.js init

License

MIT

Capsule

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

FlyDocs

README from the maker

Capsule

Install

pnpm

yarn

bun

Quickstart

API Capsule

Purpose

Key Files

Decisions

Commands

MCP Server

Seeing the savings

Agent Workflow

Custom Groups

Building the Demo

Documentation Site

Status

Install for Local Development

License