ModuLisp

Standalone build of the portable uSEQ signal engine. Meson + ninja:

meson setup build && ninja -C build && meson test -C build

Module map

• src/modulisp/lisp/ — header-only symbol interning (symbol_intern.h).
• src/signal_engine/ — the language core:
  • token → cell_store → graph_builder → node_pool: source text to fixed-pool signal DAG (deterministic compile, CSE, bounded diagnostics).
  • compiler_pipeline: parse + graph-mutation transactions (LKG rollback).
  • cold_eval: top-level evaluation — definitions, output assignment, external sink assignment (including the descriptor-gated vector sugar: [base…] :offset [mod…] and [[base mod] …] pairs expand to the same per-channel graphs as the flat form, spec §4.3–§4.5), cold commands, transport control.
  • executor: tick-time DAG execution + publish_sink_values.
  • ext_registry: generic named external-input / external-sink / cold-command registries — the firmware-profile seam (see MAP.md). A sink descriptor sets vec_base_ch/vec_mod_ch to accept the vector sugar.
• src/utils/, src/devtools/, src/ports/ — support libraries, gated telemetry, and hardware port interfaces with host mocks.
• test/ — Catch2 executables over the host subset of the engine.

External registers are generic: firmware registers names like nn/* or midi/* at boot; the engine ships no such builtins. A sink registered with vector packing accepts its channels flat or sugar-packed — all forms bind identically and publish through the same pool output slots.