Tantra: A FastAPI-Inspired Python Agent Harness Framework
thehazarika · reddit · 2026-08-11
A developer open-sourced Tantra, a highly extensible Python agent harness framework with an API design inspired by FastAPI.
Built for serving autonomous agents or human-in-the-loop systems, it comes with core components including:
- Persistence & Memory: Session persistence and memory management via Postgres/SQLite, with multi-tenancy support.
- Tools & Skills: Dynamic skills loading, shipping with built-in tools for web search, PDF/DOC reading, and guardrailed Bash execution.
- Architecture: Supports multi-agent and sub-agent subtrees, along with pluggable guardrails.
To demonstrate its capabilities, the author built two full apps: a Perplexity clone with parallel agent support and a simple CLI coding assistant.
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