# Phase 3 Steam discovery evidence

- Date: 2026-07-18
- Requirement IDs: R-005, R-009, R-012, R-016, R-024, R-027
- Phase/gate: phase 3 / read-only Steam discovery
- Scope: native Steam-root selection, bounded `libraryfolders.vdf` and
  `appmanifest_*.acf` parsing, installed-title normalization, stable App ID and
  installation identity, provider-scoped CLI discovery, and hostile fixtures
- Exclusions: Steam process startup, launch plans, game execution, Proton selection,
  lifecycle tracking, account data, artwork, and Steam configuration mutation
- Commands: `cargo test --workspace --all-targets --locked`; `kiln scan --provider
  steam --json`; `make check`
- Expected result: missing/unmounted libraries are skipped; partial installs and known
  Steam runtime packages are excluded; malformed, duplicate, oversized, invalid-UTF-8,
  traversal, and symlinked metadata fail closed; installed games normalize without
  starting Steam
- Observed result: 61 automated tests passed; the production CLI parsed the current
  local Steam metadata and reported 227 installed titles without starting Steam or a
  game; a real trailing-space display-name case was normalized and retained as a fixture
- Result: pass