Elixirs

Elixirs (LangServe Apps)

Elixirs provide backend GenAI capabilities as HTTP endpoints hosted by LangServe. Each elixir is a lightweight Python app that conforms to a base class and exposes chains/agents via /invoke.

• Template: https://github.com/dermatologist/dhti-elixir-template
• Base classes: https://github.com/dermatologist/dhti-elixir-base
• Scaffold with cookiecutter: https://github.com/dermatologist/cookiecutter-uv

Concepts

• Input/Output schemas using Pydantic for clear contracts
• Tool integrations via MCP server or direct SDKs
• RAG using Redis vector store
• Runtime bootstrap for models and hyperparameters

Manage Elixirs

Install

Install from a Git repository or local folder.

npx dhti-cli elixir install -g <git_url> -n <name>

Flags:

• -g, --git: GitHub repository URL.
• -n, --name: Name of the elixir (required).
• -b, --branch: Branch to install from (default: develop).
• -l, --local: Install from a local directory path instead of Git.
• -s, --subdirectory: Install from a subdirectory in the repo/local path (for monorepos).
• -d, --dev: Install in dev mode (links source to container).
• -p, --pypi: Install a specific PyPi package (e.g., dhti-elixir-base>0.1.0).

Initialize

Create a new elixir project structure.

npx dhti-cli elixir init -n <name>

Development

Sync changes to a running container (hot-reload style).

npx dhti-cli elixir dev -d <local_src_path> -n <name> -c <container_name>

Flags:

• -c, --container: Target container name (default: dhti-langserve-1).

Uninstall

Remove an installed elixir.

npx dhti-cli elixir uninstall -n <name>

Optionally edit ~/dhti/elixir/app/bootstrap.py to switch models (e.g., Ollama llama3, Gemini, etc.).

Develop with hot reload

See Hot Reload for the dev sync command.

Package as Docker image

npx dhti-cli docker -n yourdockerhandle/genai-test:1.0 -t elixir

Examples and roadmap

• dhti-elixir-template: Echo and mock-LLM examples
• Coming soon: dhti-elixir-fhire, dhti-elixir-fhirs, dhti-elixir-upload