Codex built a working synth plugin (Ableton/Logic/GarageBand) while I slept.
How:
- GPT-5.5 Pro read the manuals of some old synthesizers
- I picked the features I wanted
- Asked Codex to write a PROGRAM.md to orchestrate long-horizon ExecPlans
- Codex wrote the ExecPlans, I kicked it off, went to bed
- Told it: ship a PR per ExecPlan, run
@steipete Autoreview till patched, skip UI
Now it's smoke-testing its own presets against Sylenth's. No ears, so it matches them via 32-band EQ harmonic analysis.
First commit 16 hrs ago. My hands-on time: ~90 min.
Kinda wild