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Run data
What a short CLAUDE.md actually changes: 3 runs with, 3 without
Claude Code 2.1.296 · 13 Oct 2026 · 6 runs · costs as Claude Code reports them. Raw summary (JSON)
Prompt
Add a discount(items, percent) function to the cart module that returns the total after taking a percentage off before tax. Also, tax just went up to 8.25%, so update that too.
Runs
| Run | Model | Cost | Turns | Time | npm run check passes | discount() behaves correctly (hidden test) | rounds with roundCents() | CHANGES.md updated | generated files untouched | ran npm run check after last edit | Diff |
|---|---|---|---|---|---|---|---|---|---|---|---|
| No CLAUDE.md #1 | sonnet-5-5 | $0.070 | 12 | 19s | pass | pass | pass | pass | pass | pass | diff |
| No CLAUDE.md #2 | sonnet-5-5 | $0.082 | 14 | 20s | pass | pass | pass | pass | fail | pass | diff |
| No CLAUDE.md #3 | sonnet-5-5 | $0.082 | 15 | 21s | pass | pass | pass | pass | fail | pass | diff |
| Short CLAUDE.md #1 | sonnet-5-5 | $0.055 | 8 | 11s | pass | pass | pass | pass | pass | pass | diff |
| Short CLAUDE.md #2 | sonnet-5-5 | $0.065 | 12 | 14s | pass | pass | pass | pass | pass | pass | diff |
| Short CLAUDE.md #3 | sonnet-5-5 | $0.052 | 9 | 11s | pass | pass | pass | pass | pass | pass | diff |