Add diff command to compare scan snapshots#17
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Compares two scan results by instance ID. Detects added, removed, and changed instances across 6 fields (instance type, pricing model, cost, state, GPU allocation, waste severity). Computes cost deltas.
gpuaudit diff old.json new.json [--format table|json] Closes #5
The recommendation said "No GPU pods scheduled for X days" but X was the node's total uptime, not the idle duration. We don't know when the node became idle — only that it currently has zero GPU pods. Changed wording to "Node up X days with 0 GPU pods scheduled."
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Apr 21, 2026
Add diff command to compare scan snapshots
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Summary
gpuaudit diff <before.json> <after.json>subcommand that compares two scan snapshotsChanges
internal/diff/diff.go— Compare function with instance matching and delta computationinternal/diff/diff_test.go— 6 test cases covering additions, removals, changes, and edge casesinternal/output/diff.go— Table and JSON formatters for diff resultscmd/gpuaudit/main.go— Newdiffcobra subcommandinternal/analysis/rules.go— Fix idle duration displayREADME.md— Updated docsTest plan
go test ./...)go vetcleangpuaudit diff before.json after.jsonwith two scan snapshots🤖 Generated with Claude Code