v0.1.0 — M1 Core (alpha)

Milestone M1 — Core: shell, transport, Arrangement, device chain with plug-ins,
basic Mixer, and the Papercut design system.

Added

• Engine vertical slice: Project, Commands, JSON UI, Arrangement and playback.
• Clip editing: select, move, resize and split clips; seek the playhead from the timeline.
• Track channel controls: volume, pan, mute and solo.
• Audio recording with input selection, live waveform and takes.
• MIDI tracks and clips, piano roll note editing and quantize.
• Plug-ins, mixer, shapers, session and recovery foundations.
• Design tokens: Papercut DS colours, type and scales (#17).
• Shared control library and continuous-control interaction model (#18).
• Top bar with menu, transport, status readouts and view switcher (#19).
• Library Browser with search, categories, drag to track and sample preview (#20).
• Detail view with clip panel and horizontal device chain of DeviceCards (#21).
• Arrangement clip operations: loop-extend, duplicate, consolidate and clip menu (#24).
• Arrangement zoom limits, lane height and Follow (#25).
• Mixer toolbar: section chips, meter modes, reset peaks, signal-flow indicator (#27).
• Mixer inserts: 8 slots, bypass, reorder, copy, picker and context menu (#28).
• Global interaction layer: selection, Esc, context menus, tooltips, toasts, drag-and-drop (#29).
• Per-view keyboard shortcut map kept in data (PRD §17) (#30).
• Record count-in; Shift-click Rec skips it (#61).
• MIDI recording from a MIDI input on armed MIDI tracks (#63).

Changed

• Track device chain separated from mixer Inserts (#22).
• Arrangement ruler, lanes, track headers and clips restyled to the M1 design (#23).
• Mixer channel strip rebuilt: head, fader dB mapping, stereo meter, buttons (#26).

Removed

• Pre-redesign UI from the M1 shell.

Fixed

• Silent tempo-tagged loops with no waveform.
• M1 review findings and design parity in lanes, devices and the mixer.