Call site never changes
Bind a replacement in a registry and activate it for a scope. The binding runs inside that scope. Callers stay untouched.
Add dynamically scoped behaviors to your functions
Replace, wrap or transform your TypeScript functions from outside their call site.
One identity, three jobs
A capability is its own registry key, type contract, and default implementation. No tokens, no string lookups, no container.
Misuse doesn't compile
A binding with the wrong signature is a compile error, and requires() makes
a missing binding one too.
Nothing extra
Zero dependencies, ESM only, side-effect free. v0.1.0 bundles to 1.7 KB min+gzip.
New here? Read the Introduction for what mycl is and when to reach for it, or jump straight to the Quick Start.