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Postfader v0.13.0

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@github-actions github-actions released this 15 Aug 23:05
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v0.13.0
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Postfader V13

Give your AI assistant eyes and carefully checked hands inside FL Studio.
Postfader runs locally, starts read-only, and never saves your project.

Works with your AI client

Postfader is model- and vendor-independent. It works with any MCP-compatible AI
client that can launch a local stdio server, including:

  • Claude Desktop and Claude Code
  • ChatGPT desktop and OpenAI Codex — desktop app, CLI, and IDE extension
  • Cursor — editor and CLI
  • T3 Code — through a configured MCP-capable Codex, Claude, or Cursor agent
  • Other MCP-compatible desktop and coding assistants

The included helper generates ready-to-use Codex configuration and the standard
mcpServers JSON shape used by Claude-compatible clients. Other MCP clients
use the same executable, arguments, and environment values. The Claude Desktop
.mcpb is an optional convenience package, not a requirement for using
Postfader with another client.

Download and install

🍎 macOS

  1. Download Postfader-v0.13.0-macOS.zip.
  2. Extract the entire ZIP and quit FL Studio.
  3. Double-click Install Postfader.command.
  4. Open START HERE - macOS.md and follow the short FL Studio MIDI setup.

If macOS blocks the launcher, Control-click it and choose Open, or run
bash "./Install Postfader.command" from Terminal in the extracted folder.

🪟 Windows

  1. Download Postfader-v0.13.0-Windows.zip.
  2. Extract the entire ZIP to a writable folder and quit FL Studio.
  3. Double-click Install Postfader.cmd.
  4. Review the dry-run summary, approve the installation, then open
    START HERE - Windows.md for the FL Studio MIDI setup.

Requirements

  • FL Studio 2026 version 26.1.3 build 5336 or newer
  • Python 3.10 through 3.14
  • Internet access during installation for Python dependencies
  • One local virtual MIDI endpoint

Postfader does not install or configure virtual MIDI software. macOS includes
the IAC Driver; Windows users need a bidirectional virtual MIDI endpoint from
the provider of their choice. The included launchers are readable open-source
scripts and are not code signed.

See the complete setup guide for AI-client configuration and troubleshooting.

After installation

  1. Enable the same virtual MIDI endpoint under FL Studio's MIDI Input and
    Output, with the same FL Port number on both sides.
  2. Set the Input controller type to Universal Bridge and reload the script.
  3. Generate configuration for your MCP-compatible AI client using the included
    helper.
  4. Start read-only. When you want changes, ask your AI client to enable write
    mode for the current session—FL Studio does not need to restart.

Other downloads

What’s new in V13

  • Windows 11 x64 installer, diagnostics, packaging, and native CI support
  • Session write-mode control without restarting FL Studio
  • Readback-verified mixer, channel, pattern, transport, routing, and plug-in changes
  • Native effect and Channel Rack generator parameter discovery
  • Safer exact matching for enumerated plug-in options
  • A clearer setup experience and public documentation

Windows FL/virtual-MIDI supervised validation remains pending; the Windows
implementation, installer, native test matrix, clean installs, and release
artifacts are verified in CI.

Verification

  • 1,049 safe checks across 21 allowlisted test files
  • Clean package installation on macOS and Windows with Python 3.10 and 3.14
  • Live macOS read, write/restoration, note, and mid-session mode-toggle acceptance
  • Public-tree privacy scan and distribution-content verification

Changes

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