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It lists the four exported functions in `src/lib/cart.js`, one line each: `subtotal`, `total`, `itemCount` and `discount`. It also explains how to run the checks: `npm test` runs the tests only, and `npm run check` runs lint and then the tests. `npm run check` passes with all 8 tests green.\n\nTwo things to know:\n- I didn't add a `CHANGES.md` entry, since the README is documentation only and doesn't change anything consumers see.\n- `subtotal` and `total` have no JSDoc comment in the source, which CLAUDE.md requires for exported functions. I left the code alone because you only asked for the README.", "diffstat": "CHANGES.md | 3 +++\n README.md | 15 +++++++++++++++\n src/lib/cart.js | 11 +++++++++++\n tests/lib/cart.test.js | 26 +++++++++++++++++++++++++-\n 4 files changed, 54 insertions(+), 1 deletion(-)" }, { "name": "trimmed-fresh-3", "model": "claude-sonnet-5-5", "steps": [ { "step": 1, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.049601799999999995, "resultSubtype": "success", "isError": false, "turns": 9, "durationMs": 13057, "inputTokens": 120854, "outputTokens": 1712, "firstContextTokens": 18775, "peakMainContextTokens": 21560, "resultUsage": { "input": 12, "cacheRead": 112353, "cacheWrite": 8489, "output": 1712 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 13069, "cacheWrite": 5704, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 18773, "cacheWrite": 528, "output": 20 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 19301, "cacheWrite": 289, "output": 53 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 19590, "cacheWrite": 696, "output": 32 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 20286, "cacheWrite": 1048, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 21334, "cacheWrite": 224, "output": 248 } ] }, { "step": 2, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.0344476, "resultSubtype": "success", "isError": false, "turns": 8, "durationMs": 8671, "inputTokens": 80012, "outputTokens": 1098, "firstContextTokens": 18789, "peakMainContextTokens": 21118, "resultUsage": { "input": 8, "cacheRead": 73566, "cacheWrite": 6438, "output": 1098 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 14678, "cacheWrite": 4109, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 18787, "cacheWrite": 878, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 19665, "cacheWrite": 771, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 20436, "cacheWrite": 680, "output": 180 } ] }, { "step": 3, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.029754000000000003, "resultSubtype": "success", "isError": false, "turns": 7, "durationMs": 7564, "inputTokens": 58894, "outputTokens": 983, "firstContextTokens": 18789, "peakMainContextTokens": 20523, "resultUsage": { "input": 6, "cacheRead": 53045, "cacheWrite": 5843, "output": 983 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 14678, "cacheWrite": 4109, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 18787, "cacheWrite": 793, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 19580, "cacheWrite": 941, "output": 171 } ] } ], "exitCode": 0, "signal": null, "spawnError": null, "checks": [ { "name": "npm run check passes", "pass": true }, { "name": "discount() correct (hidden test)", "pass": true }, { "name": "itemCount() correct (hidden test)", "pass": true }, { "name": "README covers all 4 functions", "pass": true }, { "name": "README mentions npm run check", "pass": true }, { "name": "generated files untouched", "pass": true }, { "name": "ran npm run check after last edit", "pass": true } ], "resultSubtype": "success", "isError": null, "costUsd": 0.1138034, "costByModel": { "claude-sonnet-5-5": { "costUsd": 0.1138034, "inputTokens": 26, "cacheReadTokens": 238964, "cacheWriteTokens": 20770, "outputTokens": 3793 } }, "modelsCalled": [ "claude-sonnet-5-5" ], "turns": 24, "durationMs": 29292, "subagentCalls": 0, "subagentCallDetails": [], "toolCalls": { "main": 21, "inSubagents": 0, "byName": { "Bash": 7, "Edit": 8, "Read": 5, "Write": 1 } }, "sessionLogSubagents": [], "permissionDenials": 1, "finalMessage": "I created `README.md`. It has one line for each of the four exports in `src/lib/cart.js`: `subtotal`, `itemCount`, `discount` and `total`. It also has a short section on running the checks: `npm run check` for lint plus tests, and `npm test` for tests only.\n\nI added a line under `## Unreleased` in `CHANGES.md`, as the project rules require. `npm run check` finished with all 4 tests passing. I only looked at the last 20 lines of its output, so I didn't see the lint output.", "diffstat": "CHANGES.md | 3 +++\n README.md | 13 +++++++++++++\n src/lib/cart.js | 8 ++++++++\n tests/lib/cart.test.js | 12 +++++++++++-\n 4 files changed, 35 insertions(+), 1 deletion(-)" }, { "name": "full-continue-3", "model": "claude-sonnet-5-5", "steps": [ { "step": 1, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.06250009999999999, "resultSubtype": "success", "isError": false, "turns": 9, "durationMs": 15224, "inputTokens": 118327, "outputTokens": 2133, "firstContextTokens": 21948, "peakMainContextTokens": 25287, "resultUsage": { "input": 10, "cacheRead": 106101, "cacheWrite": 12216, "output": 2133 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 13069, "cacheWrite": 8877, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 21946, "cacheWrite": 787, "output": 4 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 22733, "cacheWrite": 1005, "output": 34 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 23738, "cacheWrite": 877, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 24615, "cacheWrite": 670, "output": 360 } ] }, { "step": 2, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.021738700000000014, "resultSubtype": "success", "isError": false, "turns": 6, "durationMs": 7576, "inputTokens": 52749, "outputTokens": 1219, "firstContextTokens": 25686, "peakMainContextTokens": 27063, "resultUsage": { "input": 6, "cacheRead": 50967, "cacheWrite": 1776, "output": 1219 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 4, "cacheRead": 25285, "cacheWrite": 397, "output": 8 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 25682, "cacheWrite": 1379, "output": 242 } ] }, { "step": 3, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.0157321, "resultSubtype": "success", "isError": false, "turns": 4, "durationMs": 5666, "inputTokens": 55499, "outputTokens": 755, "firstContextTokens": 27344, "peakMainContextTokens": 28155, "resultUsage": { "input": 6, "cacheRead": 54401, "cacheWrite": 1092, "output": 755 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 4, "cacheRead": 27061, "cacheWrite": 279, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 27340, "cacheWrite": 813, "output": 177 } ] } ], "exitCode": 0, "signal": null, "spawnError": null, "checks": [ { "name": "npm run check passes", "pass": true }, { "name": "discount() correct (hidden test)", "pass": true }, { "name": "itemCount() correct (hidden test)", "pass": true }, { "name": "README covers all 4 functions", "pass": true }, { "name": "README mentions npm run check", "pass": true }, { "name": "generated files untouched", "pass": true }, { "name": "ran npm run check after last edit", "pass": true } ], "resultSubtype": "success", "isError": null, "costUsd": 0.0999709, "costByModel": { "claude-sonnet-5-5": { "costUsd": 0.2467098, "inputTokens": 48, "cacheReadTokens": 474638, "cacheWriteTokens": 41292, "outputTokens": 9592 } }, "modelsCalled": [ "claude-sonnet-5-5" ], "turns": 19, "durationMs": 28466, "subagentCalls": 0, "subagentCallDetails": [], "toolCalls": { "main": 16, "inSubagents": 0, "byName": { "Glob": 1, "Bash": 5, "Edit": 9, "Write": 1 } }, "sessionLogSubagents": [], "permissionDenials": 1, "finalMessage": "I created `README.md` with a one-line entry for each of the four exports in `src/lib/cart.js`: `subtotal`, `total`, `itemCount` and `discount`. It also has a short section on running `npm test` and `npm run check`. `npm run check` still passes, and I added a line to `CHANGES.md` under `## Unreleased`.\n\nI also put one sentence at the top describing the item shape (`{ sku, price, qty }`) and that money is in dollars rounded to cents. Delete it if you want only the function list and the checks.", "diffstat": "CHANGES.md | 3 +++\n README.md | 15 +++++++++++++++\n src/lib/cart.js | 11 +++++++++++\n tests/lib/cart.test.js | 30 +++++++++++++++++++++++++++++-\n 4 files changed, 58 insertions(+), 1 deletion(-)" }, { "name": "trimmed-continue-3", "model": "claude-sonnet-5-5", "steps": [ { "step": 1, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.0487079, "resultSubtype": "success", "isError": false, "turns": 10, "durationMs": 11997, "inputTokens": 120639, "outputTokens": 1637, "firstContextTokens": 18775, "peakMainContextTokens": 21509, "resultUsage": { "input": 12, "cacheRead": 112189, "cacheWrite": 8438, "output": 1637 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 13069, "cacheWrite": 5704, "output": 21 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 18773, "cacheWrite": 375, "output": 21 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 19148, "cacheWrite": 503, "output": 20 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 19651, "cacheWrite": 613, "output": 34 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 20264, "cacheWrite": 1020, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 21284, "cacheWrite": 223, "output": 198 } ] }, { "step": 2, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.01875149999999999, "resultSubtype": "success", "isError": false, "turns": 6, "durationMs": 6398, "inputTokens": 67339, "outputTokens": 870, "firstContextTokens": 21746, "peakMainContextTokens": 22885, "resultUsage": { "input": 8, "cacheRead": 65955, "cacheWrite": 1376, "output": 870 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 4, "cacheRead": 21507, "cacheWrite": 235, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 21742, "cacheWrite": 964, "output": 16 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 22706, "cacheWrite": 177, "output": 111 } ] }, { "step": 3, "permissionMode": "acceptEdits", "exitCode": 0, "signal": null, "spawnError": null, "costUsd": 0.013243400000000002, "resultSubtype": "success", "isError": false, "turns": 4, "durationMs": 4971, "inputTokens": 46828, "outputTokens": 637, "firstContextTokens": 23035, "peakMainContextTokens": 23793, "resultUsage": { "input": 6, "cacheRead": 45914, "cacheWrite": 908, "output": 637 }, "requests": [ { "model": "claude-sonnet-5-5", "input": 4, "cacheRead": 22883, "cacheWrite": 148, "output": 17 }, { "model": "claude-sonnet-5-5", "input": 2, "cacheRead": 23031, "cacheWrite": 760, "output": 112 } ] } ], "exitCode": 0, "signal": null, "spawnError": null, "checks": [ { "name": "npm run check passes", "pass": true }, { "name": "discount() correct (hidden test)", "pass": true }, { "name": "itemCount() correct (hidden test)", "pass": true }, { "name": "README covers all 4 functions", "pass": true }, { "name": "README mentions npm run check", "pass": true }, { "name": "generated files untouched", "pass": true }, { "name": "ran npm run check after last edit", "pass": true } ], "resultSubtype": "success", "isError": null, "costUsd": 0.08070279999999999, "costByModel": { "claude-sonnet-5-5": { "costUsd": 0.1968701, "inputTokens": 58, "cacheReadTokens": 514391, "cacheWriteTokens": 28974, "outputTokens": 7288 } }, "modelsCalled": [ "claude-sonnet-5-5" ], "turns": 20, "durationMs": 23366, "subagentCalls": 0, "subagentCallDetails": [], "toolCalls": { "main": 17, "inSubagents": 0, "byName": { "Glob": 1, "Bash": 6, "Edit": 9, "Write": 1 } }, "sessionLogSubagents": [], "permissionDenials": 1, "finalMessage": "I created `README.md`. It has one line for each of the four exports in `src/lib/cart.js` (`subtotal`, `itemCount`, `discount`, `total`) and a short section on running `npm run check` and `npm test`.\n\nI also added a line under `## Unreleased` in `CHANGES.md`. `npm run check` still passes.", "diffstat": "CHANGES.md | 3 +++\n README.md | 13 +++++++++++++\n src/lib/cart.js | 8 ++++++++\n tests/lib/cart.test.js | 10 +++++++++-\n 4 files changed, 33 insertions(+), 1 deletion(-)" } ], "finishedAt": "2026-11-11T20:08:09.321Z", "aggregates": [ { "setup": "full-fresh", "runs": 3, "allChecksPassed": 3, "errors": 0, "avgCostUsd": 0.148143, "minCostUsd": 0.142685, "maxCostUsd": 0.152346, "avgCacheReadPerSequence": 256203, "avgCacheWritePerSequence": 31205, "avgUncachedInputPerSequence": 25, "avgOutputPerSequence": 4446, "avgTurns": 25, "avgDurationSec": 33.587333, "steps": [ { "step": 1, "avgCostUsd": 0.064972, "firstRequestCacheRead": [ 13069, 13069 ], "firstRequestCacheWrite": [ 8875, 8877 ], 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"totalCostUsd": 1.341903, "smokeCostUsd": 0.107588, "smokeRuns": [ "2026-11-11T20-00-36-568Z" ], "slotSpendUsd": 1.449491, "notes": [ "Costs are Claude Code's reported list-price costUSD. For continued sessions, each step's cost is the session's cumulative cost minus the steps before it. costByModel on continued sessions sums cumulative figures and overstates cost; use costUsd.", "Cache state can carry across runs (Anthropic's prompt cache lasts about 5 minutes and is shared by requests on the same key). No run is proven cold: the first session of this run (and the smoke run before it) already read 13,069 tokens from cache on its first request.", "Variants ran in paired order (rep 1: full-fresh, trimmed-fresh, full-continue, trimmed-continue; then rep 2; then rep 3), one at a time.", "The full CLAUDE.md is the 1,501-word one from the context-audit recipe; the trimmed one is that recipe's 9-line CLAUDE.md with the same four rules. No skills, rules or other .claude files in either." ] }