FA-9572 / Dependency resolution / Member archive

Installed package reconciliation: Pinned older versions are silently retained · case 02

Pinned older versions are silently retained.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

For each desired package, emit install if missing, upgrade or downgrade for version movement, reinstall for digest drift, and remove installed packages absent from desired. Output actions sorted by package name.

Why this case matters

An offline model of installed package reconciliation, suitable for testing build and release tooling without external services.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
fixture 5	`[]`	`[["a", "downgrade"]]`	Failed

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