Runtime

Mélodium uses a runtime engine. Script files are fully parsed and their logic built and checked before any execution starts. This means type errors, missing connections, unsatisfied inputs, and dependency problems are all caught at startup, not mid-run.

When launching a Mélodium program, the following stages happen in order:

1. Script textual parsing and semantic build - the source files are parsed and their syntax validated. Element declarations are collected and checked for structural correctness.
2. Usage and dependencies resolution - all use imports are resolved and external packages are loaded. Missing or incompatible dependencies are reported here.
3. Logic building - the full treatment graph is assembled and validated: connection types are checked, cycles are detected, and every input is verified to be satisfied. No code runs until this passes.
4. Models instantiation - model instances are created and configured with their parameters. Startup behaviors (such as opening connections) occur here.
5. Execution and tracks triggering - the program begins running. Models start producing events and spawning tracks.