# Roadmap

## Phase 0 — Baseline
Inspect repository/toolchain, verify Makefile and minimal executable, document
dependencies. No system changes without permission.

## Phase 1 — C core and offline processing
Graph data structures, validation, cycle detection, topological ordering,
preallocated buffers, test oscillator, gain and offline render tests.

## Phase 2 — Real-time backend
Choose and implement a Linux backend. Document callback semantics, start/stop,
device errors, shutdown, and safe graph publication.

## Phase 3 — FLTK shell
Main window, transport controls, view switching, backend status, clean startup
and shutdown through the C API.

## Phase 4 — Modular editor
Draw nodes/ports/edges; create, move and connect nodes; reject invalid edges;
safely submit edits to the C core.

## Phase 5 — Project and sequencer
Versioned persistence, stable IDs, tracks, clips, timeline, selection, zoom,
scrolling, and transport synchronization.

## Phase 6 — Audio clips and recording
Audio import/playback, recording through bounded buffers, missing-asset
handling, no file I/O in callbacks.

## Phase 7 — MIDI and instrument
MIDI input/events/clips, simple internal instrument, note-off/panic handling,
then a basic piano roll.

## Phase 8 — Mixer and editing
Gain/pan, meters, mute/solo, automation, undo/redo, keyboard workflow.

## Phase 9 — Extensibility and release
Native node API, evaluate plugin hosting, licensing review, packaging,
installation tests, performance and recovery tests.

Do not skip phases without documenting why and preserving acceptance criteria.