Immutable bytecode commitment
Compiled logic is committed directly to Bitcoin so a semantic change produces a different commitment.
Foundation
SCL foundation
A Bitcoin native execution foundation for commitments and outcomes that can be independently checked.
The purpose
Execution that can be read back.
SCL is the shared foundation used by Dark Fusion. It is designed around a simple institutional question: can the commitment, execution path and resulting state be inspected by an independent party?
The public architecture focuses on a fixed representation of logic, a repeatable way to verify outcomes and explicit execution limits. The objective is not more abstraction. It is a clearer path from what was committed to what can be proven.
Assurance principles
Deterministic replay
An execution result can be checked again from the bytecode, payload, Bitcoin derived context and prior state.
Bounded execution
Instruction, stack and call depth limits are known before a program runs.
Why it matters
Verifiability is a design constraint.
Institutional systems need more than an outcome. They need an understandable route to the outcome. SCL is presented as the technical foundation for systems where counterparties can inspect what was committed and independently verify what happened.
That model is relevant wherever financial logic, settlement instructions or token state needs a path that can be replayed rather than accepted as a black box.