nocter-target-selection

Responsibility

Own the single syntax-backed activity decision for items and imports guarded by #target.

Contract

The builder consumes syntax trees, source storage, and one selected compilation target. It publishes an immutable TargetSelection used by discovery and declaration lowering. Unknown authored targets remain typed source errors while their items stay inactive for safe graph discovery.

Invariants

• A target directive is decoded once.
• Complete target gates remain usable beside unrelated incomplete syntax.
• Incomplete or unknown gates never activate nested imports.
• Downstream stages cannot rescan syntax to choose a different activity result.