Fya — Development skill for Claude Code

fya

`fya` is a Claude Code print-mode wrapper backed by an interactive PTY session.

It provides practical parity with `claude -p` for callers that rely on print-mode text, JSON, or stream-json output. Internally, it starts interactive `claude` in a hidden PTY, types the prompt into the terminal, tails Claude Code transcript logs, and emits Claude-compatible output.

`fya` mirrors the one-shot `claude -p` contract: one process invocation accepts one prompt, streams one answer, emits one final result, and exits after cleanup.

Requirements

• Go 1.26 to build from source
• Claude Code installed as claude
• Unix/macOS for PTY support

Windows returns an unsupported PTY error in v1.

Installation

**Homebrew:**

brew install umputun/apps/fya

**Binary releases:** download from [GitHub Releases](https://github.com/umputun/fya/releases) for linux/darwin amd64/arm64.

**From source:**

git clone https://github.com/umputun/fya.git
cd fya
make build

The binary is written to `.bin/fya`.

Usage

`fya` accepts the print-mode shape expected by tools that invoke Claude Code:

printf 'say hello\n' | fya --print --output-format=stream-json

A positional prompt also works without stdin and takes precedence over stdin:

fya --print "say hello"

Supported consumed compatibility flags:

• -p, --print
• --output-format=text|json|stream-json
• --input-format=text|stream-json
• --json-schema=SCHEMA
• --replay-user-messages

Wrapper con