prune-depslisted

# Prune Dependencies Find unused NuGet packages and stale references, then remove the confirmed-dead ones. Three targets: 1. **Orphaned central packages** — `PackageVersion` in `Directory.Packages.props` that no project references and that isn't a deliberate transitive pin. 2. **Unused `PackageReference`** — a direct package reference whose namespaces/types the project's code never uses. 3. **Unused `ProjectReference`** — a project-to-project reference where the referencing project uses no public type from the referenced project. **The hard part is avoiding false positives.** A package with zero `using` directives is not automatically unused — analyzers, source generators, runtime-only packages, and transitive pins all look "unused" to a naive scan. Read `references/false-positives.md` before flagging anything. ## Usage ``` /prune-deps # Full audit; remove approved findings; verify build /prune-deps --report-only # Read-only — produce findings, never edit /prune-deps --no-mcp # Skip roslyn MCP; grep-only usage analysis /prune-deps --project Core # Scope code-usage analysis to one project ``` ## Autonomy Phase 1–3 are read-only (file reads, grep, `dotnet list`, MCP queries) — pre-approved per the auto-approval policy; proceed without prompting. **Removals (Phase 5) require a single `AskUserQuestion` approval gate** per the repo's "ask before fixing" convention. `--report-only` skips Phases 4–5 entirely. --- ## Phase 1: Inventory Gather t