teukhos 0.2.0

Spawn MCP servers from declarative YAML configuration

Teukhos

You describe the tool. Teukhos forges it as MCP.

Spawn production-ready MCP servers from a single YAML file. No Python required.

pip install teukhos
teukhos serve git-tools.yaml

That's it. Your CLI tools are now callable by any AI agent.

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The Problem

The MCP ecosystem has a critical gap:

What exists	What's missing
Raw FastMCP — write Python	Config-as-code → running MCP server
any-cli-mcp-server — scrapes --help	Structured, typed CLI → tool mapping
Enterprise gateways (Bifrost, MCPX)	Lightweight, developer-owned, open-source
Visual builders (Langflow, n8n)	CI/CD-native, GitOps-friendly runtime

Teukhos fills this gap. Define your tools in YAML. Run one command. Done.

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30-Second Quickstart

Install:

pip install teukhos
# or: uvx teukhos

Create teukhos.yaml:

forge:
  name: "my-tools"

tools:
  - name: git_log
    description: "Show recent git commits"
    adapter: cli
    cli:
      command: git
      subcommand: [log, --oneline]
    args:
      - name: count
        type: integer
        flag: "-n"
        default: 10
    output:
      type: stdout

Serve:

teukhos serve teukhos.yaml

Add to Claude Desktop:

teukhos install teukhos.yaml --client claude-desktop

Ask Claude: "Show me the last 5 commits" — it uses the tool.

---

How It Works

teukhos.yaml
     │
     ▼
┌─────────────┐
│   Parser    │  Pydantic validation, type checking, early error detection
└──────┬──────┘
       │
       ▼
┌─────────────┐
│  Adapter    │  Builds async handler functions per tool
│  Factory    │
└──────┬──────┘
       │
       ▼
┌─────────────┐
│  FastMCP    │  Registers tools with correct JSON Schema
│  Builder    │  (inferred from your arg definitions)
└──────┬──────┘
       │
       ▼
┌─────────────┐
│  MCP Server │  stdio or HTTP — ready for Claude, Cursor, any MCP client
└─────────────┘

---

CLI Reference

teukhos serve [config]          Start the MCP server
teukhos validate [config]       Validate config, exit 0/1 — use in CI
teukhos install [config]        Register with Claude Desktop
teukhos wait-ready              Poll /health until ready — use in CI pipelines
teukhos version                 Print version
teukhos discover <binary>       (Coming v0.3) Auto-generate config from --help

Options for serve:

--transport  -t    Override transport: stdio | http  (default: from config)
--port       -p    Override HTTP port                (default: 8765)

Config file names: Teukhos looks for teukhos.yaml by default. Legacy mcp-forge.yaml is accepted automatically with a deprecation note.

---

Full Config Reference

forge:
  name: "my-toolset"          # MCP server identity
  version: "1.0.0"
  description: "What this server does"

server:
  transport: stdio             # stdio | http
  host: "127.0.0.1"           # use 0.0.0.0 for remote (add auth!)
  port: 8765

auth:
  mode: none                   # none | api_key
  api_keys:
    - "${MY_API_KEY}"

tools:
  - name: tool_name            # snake_case — used as MCP tool ID
    description: "What the LLM reads to decide when to call this tool"
    adapter: cli               # cli is the only adapter in v0.2

    cli:
      command: "mybinary"      # must be on PATH or absolute path
      subcommand: []           # e.g. ["log", "--oneline"] for git
      timeout_seconds: 30
      working_dir: null        # defaults to cwd
      env: {}                  # extra env vars for this tool

    args:
      - name: arg_name
        type: string           # string | integer | number | boolean
        description: "Shown to the LLM"
        required: false
        flag: "--flag"         # CLI flag: -f or --flag
        positional: false      # true = append at end of command
        default: null
        enum: []               # restrict to allowed values
        secret: false          # redact from logs

    output:
      type: stdout             # stdout | stderr | json_field | exit_code
      field: null              # for json_field: dot-notation path e.g. "data.items"
      exit_codes:              # for exit_code type: map codes to messages
        0: "Success"
        1: "Not found"

---

Example Configs

Git Tools

forge:
  name: "git-tools"

tools:
  - name: git_log
    description: "Show recent git commits"
    adapter: cli
    cli:
      command: git
      subcommand: [log, --oneline]
    args:
      - name: count
        type: integer
        flag: "-n"
        default: 10
    output:
      type: stdout

  - name: git_status
    description: "Show working tree status"
    adapter: cli
    cli:
      command: git
      subcommand: [status, --short]
    output:
      type: stdout

  - name: git_diff
    description: "Show diff of current changes"
    adapter: cli
    cli:
      command: git
      subcommand: [diff]
    args:
      - name: staged
        type: boolean
        description: "Show staged changes only"
        flag: "--staged"
    output:
      type: stdout

System Tools

forge:
  name: "sysops"

tools:
  - name: disk_usage
    description: "Show disk usage for a path"
    adapter: cli
    cli:
      command: du
      subcommand: ["-sh"]
    args:
      - name: path
        type: string
        positional: true
        default: "."
    output:
      type: stdout

  - name: ping_host
    description: "Check if a host is reachable"
    adapter: cli
    cli:
      command: ping
      subcommand: ["-c", "3"]
      timeout_seconds: 15
    args:
      - name: host
        type: string
        required: true
        positional: true
    output:
      type: exit_code
      exit_codes:
        0: "Host is reachable"
        1: "Host is unreachable"

JSON Output

  - name: get_video_info
    description: "Get video metadata as JSON"
    adapter: cli
    cli:
      command: ffprobe
      subcommand: ["-v", "quiet", "-print_format", "json", "-show_format"]
    args:
      - name: input_file
        type: string
        required: true
        positional: true
    output:
      type: json_field
      field: "format.duration"   # extract a specific field

---

CI/CD Integration

GitHub Actions

- name: Install Teukhos
  run: pip install teukhos

- name: Validate config
  run: teukhos validate teukhos.yaml

- name: Start MCP server
  run: |
    teukhos serve teukhos.yaml --transport http --port 8765 &
    teukhos wait-ready --timeout 30

- name: Run agent tasks
  run: |
    claude --mcp http://localhost:8765/mcp \
      "Analyse the git log and summarise what changed this week"

- name: Teardown
  if: always()
  run: pkill -f "teukhos serve" || true

Docker

FROM python:3.12-slim
RUN pip install teukhos
COPY teukhos.yaml .
EXPOSE 8765
HEALTHCHECK CMD teukhos wait-ready --timeout 5
CMD ["teukhos", "serve", "--transport", "http"]

Claude Desktop (manual)

{
  "mcpServers": {
    "teukhos-git": {
      "command": "teukhos",
      "args": ["serve", "/path/to/git-tools.yaml"]
    }
  }
}

Or use the install command: teukhos install git-tools.yaml --client claude-desktop

---

Roadmap

v0.2 — Current

• YAML parser + Pydantic schema validation
• cli adapter with typed arg mapping
• Output mapping: stdout, stderr, json_field, exit_code
• FastMCP server generation at runtime
• stdio and http transports
• api_key auth
• teukhos validate for CI linting
• teukhos wait-ready for CI health checks
• teukhos install for Claude Desktop registration
• Health endpoint /health

v0.3 — Production Ready

• rest adapter (wrap any HTTP endpoint)
• shell adapter (inline bash/pwsh scripts)
• Hot reload — save YAML, tools update without restart
• teukhos discover <binary> — AI-powered config generation from --help
• OAuth 2.1 + JWT auth
• Tool-level RBAC
• Append-only audit log
• Streaming output support
• Lock file (teukhos.lock) for reproducible deployments

v0.4 — The Platform

• Embedded web UI — dark glass, real-time tool call visualization
• Bidirectional YAML ↔ visual editor sync
• OpenAPI auto-import adapter
• Tool composition / mini pipelines
• Prometheus metrics at /metrics
• Public registry: teukhos install registry://community/git-tools

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Why Teukhos?

You provide the MCP specification. Teukhos does the forging.

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Contributing

git clone https://github.com/MihaiCiprianChezan/teukhos
cd teukhos
pip install -e ".[dev]"
pytest

Pull requests welcome.

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License

MIT — see LICENSE.

Built by Mihai Ciprian Chezan