Prompt-context signal: high-confidence
Evidence: exact path `src/lib.rs` matched in the prompt

Match type: exact
Source authority: current index
Parse state: parsed
Completeness: full
Scope: path `src/lib.rs`; all sections
Evidence: file anchor `src/lib.rs`

── src/lib.rs (1 symbols, Rust) ──
  fn         hello  L2-2
[~0 tokens saved]