feat: import foundation layer (compression primitives, envelope, state store)

.editorconfig

@@ -0,0 +1,18 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab

.gitignore

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+node_modules/
+dist/
+*.tsbuildinfo
+
+mottainai.*.json
+.mottainai/
+
+.DS_Store
+*.local
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+*.log
+
+.env
+.env.*
+!.env.example
+
+.vscode/*
+!.vscode/extensions.json
+.idea/
+
+coverage/
+
+.codegraph
+.claude/worktrees/

LICENSE

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+MIT License
+
+Copyright (c) 2026 yohn.jp
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1 +1,55 @@
-# mottainai
+# Mottainai
+
+**Mottainai** ("wasteful" / "what a waste" in Japanese) is a proxy gateway
+that sits between an LLM client and one or more upstream
+[MCP](https://modelcontextprotocol.io/) servers, and **compresses tool
+definitions and tool call results before they reach the model context**.
+
+> **Status: pre-1.0 (`0.x`).** This repository is being imported from a
+> private predecessor in a series of small, dependency-ordered PRs so each
+> one stays reviewable and keeps the build green. This first PR is the
+> foundation layer only (compression primitives, envelope/logging/telemetry,
+> state-store basics) — the proxy, upstream connections, and CLI entry point
+> land in follow-up PRs. Full architecture docs land once the pieces they
+> describe exist in this repo.
+
+## How it fits together
+
+```text
+                 ┌───────────────────────────┐
+  LLM client  ⇄  │         mottainai          │  ⇄  upstream MCP servers
+ (Claude Code,   │  (this project, one stdio  │     (codegraph, fff-mcp,
+  Codex, etc.)   │      MCP endpoint)         │      GitHub MCP, ...)
+                 └───────────────────────────┘
+```
+
+Every upstream tool will be exposed under a prefixed name
+(`<upstream>__<tool>`) to avoid collisions. Tool call results pass through a
+compression pipeline before being returned to the client; the pre-compression
+original is kept for a short time and can be retrieved on demand instead of
+being lost.
+
+## Installation
+
+Requires Node.js >= 22.13, [pnpm](https://pnpm.io/) 11.18.0, and
+[ripgrep](https://github.com/BurntSushi/ripgrep) (`rg`) on `PATH`.
+
+```bash
+git clone https://github.com/yohn-jp/mottainai.git
+cd mottainai
+pnpm install
+pnpm run build
+```
+
+## Development
+
+```bash
+pnpm install
+pnpm run build          # tsc -> dist/
+pnpm test                # node --import tsx --test "src/**/*.test.ts"
+pnpm run typecheck       # tsc --noEmit
+```
+
+## License
+
+[MIT](LICENSE)

mottainai.config.json.example

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+{
+  "version": 2,
+  "mcpServers": {
+    "codegraph": {
+      "command": "codegraph",
+      "args": ["serve", "--mcp", "--path", "."]
+    },
+    "fff": {
+      "command": "fff-mcp",
+      "args": ["."]
+    },
+    "github": {
+      "transport": "streamableHttp",
+      "url": "https://api.githubcopilot.com/mcp/",
+      "capabilities": ["github"],
+      "enabled": false
+    }
+  }
+}

package.json

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+{
+  "name": "@yohn-jp/mottainai",
+  "version": "0.1.0",
+  "description": "MCP proxy gateway: aggregates upstream MCP servers behind one endpoint and compresses their tool definitions and results before they reach the LLM.",
+  "type": "module",
+  "main": "./dist/index.js",
+  "exports": {
+    ".": "./dist/index.js"
+  },
+  "files": [
+    "dist",
+    "README.md",
+    "LICENSE"
+  ],
+  "scripts": {
+    "build": "tsc -p tsconfig.build.json",
+    "test": "node --import tsx --test \"src/**/*.test.ts\"",
+    "typecheck": "tsc --noEmit",
+    "prepublishOnly": "npm run build"
+  },
+  "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.11.0",
+    "tree-sitter": "^0.22.4",
+    "tree-sitter-javascript": "^0.23.1",
+    "tree-sitter-typescript": "^0.23.2",
+    "zod": "^3.24.4"
+  },
+  "devDependencies": {
+    "@types/node": "^22.15.3",
+    "tsx": "^4.19.4",
+    "typescript": "^5.8.3"
+  },
+  "engines": {
+    "node": ">=22.13"
+  },
+  "packageManager": "pnpm@11.18.0",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/yohn-jp/mottainai.git"
+  },
+  "homepage": "https://github.com/yohn-jp/mottainai#readme",
+  "bugs": {
+    "url": "https://github.com/yohn-jp/mottainai/issues"
+  },
+  "keywords": [
+    "mcp",
+    "model-context-protocol",
+    "mcp-server",
+    "llm",
+    "agent",
+    "gateway",
+    "proxy",
+    "tool-compression"
+  ]
+}