agentyper

Agent-first Python CLI library — built on argparse + pydantic, Typer-compatible.

Typer was built for the era when type hints changed Python.
agentyper is built for the era when AI agents changed how software is operated.

Install

pip install agentyper

Quick Start

Single function (like typer.run()):

import agentyper

def search(ticker: str, limit: int = 10):
    """Search securities by ticker."""
    results = service.search(ticker, limit)
    agentyper.output(results)   # routes via --format automatically

agentyper.run(search)

Multi-command app:

import agentyper

app = agentyper.Agentyper(name="my-tool", version="1.0.0")

@app.command()
def search(ticker: str, limit: int = agentyper.Option(10, help="Max results")):
    """Search securities."""
    agentyper.output(service.search(ticker, limit))

@app.command()
def delete(name: str):
    """Delete a record."""
    if agentyper.confirm(f"Delete '{name}'?"):
        service.delete(name)

app()

Typer migration — one line:

# import typer          ← before
import agentyper as typer  # ← after; everything else stays identical

What Agents Get for Free

Every command automatically gains:

my-tool --schema                  # full JSON Schema of the entire app
my-tool search --schema           # JSON Schema for this command's params
my-tool search AAPL --format csv  # 4× cheaper output than table
my-tool search AAPL --format json # structured JSON output
my-tool delete alice --yes        # skip confirm() in agent mode
my-tool wizard --answers '{"confirms":[true],"prompts":["Alice","admin"]}'

Agent Ergonomics

Feature	agentyper	Typer
--schema on every command	✅ automatic	❌ manual
--format json/csv/table	✅ automatic	❌ manual
Structured JSON errors	✅ automatic	❌ free text
Exit code taxonomy (0/1/2)	✅	❌ 0 or 1
Interactive features in agent mode	✅ --yes/--answers bypass	❌ blocks
isatty() auto-format detection	✅	❌
Dependencies	argparse + pydantic	Click + Typer

Exit Codes

agentyper.EXIT_SUCCESS    = 0  # success
agentyper.EXIT_VALIDATION = 1  # bad input — agent should retry with correction
agentyper.EXIT_SYSTEM     = 2  # system error — agent should abort

Interactive Features

All interactive features from Typer work identically in a terminal. In agent/non-TTY mode, they resolve without blocking:

# Human terminal: asks interactively
my-tool delete alice

# Agent: auto-confirm via flag
my-tool delete alice --yes

# Agent: pre-supply all answers
my-tool wizard --answers '{"confirms":[true,false],"prompts":["Alice","admin"]}'

# Agent: pipe answers from stdin
echo '{"confirms":[true]}' | my-tool delete alice --answers -

License

MIT