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    "List every place in src/ that reads an environment variable: the file, the variable name and its default value. Write the list to ENV_READS.md as a table with columns file, variable, default (one row per variable). Don't change any other file yet.",
    "Now move all of those reads into a new src/config.js that exports one config object with those settings and the same defaults, and update every call site to use it. Leave ENV_READS.md as it is. Run the tests.",
    "Support says refunds are too high for some orders that used a discount code: customers get back more than they paid for the returned items. Find the cause and fix it, add a regression test, and run the tests."
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      "finalMessage": "Refunds on orders with a discount code were too high because the tax on the discounted amount was counted twice. I fixed that, and all 38 tests pass (37 before, plus the new one).\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` gets `priced.total` from `priceLines`. That total is the subtotal, minus the discount, plus tax on the discounted amount. It then passed the total through `withTaxAdjustment` in `src/modules/returns/policy.js`. For any order with a `discountCode`, that function added the same tax a second time. Orders without a code were unaffected. For a 1000-cent line with `SAVE10`, the customer paid 963 but was refunded 1026.\n\n**Fix:** `computeRefund` now returns `priced.total`. I removed `withTaxAdjustment`, since nothing else used it. Its comment (\"the refund must carry that tax too\") was wrong, because the total already carries it.\n\n**Regression test:** the new test in `tests/returns.test.js` refunds one line with `SAVE10` and expects 963.\n\nI noticed one more issue and left it alone. For a flat code like `FLAT500`, a partial return applies the full 500 discount to just the returned lines. That makes the refund too low rather than too high, so it isn't what Support reported. Fixing it would mean prorating the discount across the order's lines. Do you want me to look at that separately?",
      "diffstat": "ENV_READS.md                         | 15 +++++++++++++++\n src/config.js                        | 17 +++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  5 +++--\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  6 +++---\n src/modules/reports/formatters.js    |  4 +++-\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  4 ++--\n src/modules/scheduler/service.js     |  3 ++-\n src/modules/search/service.js        |  3 ++-\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  6 ++++++\n 16 files changed, 67 insertions(+), 27 deletions(-)"
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      "finalMessage": "Refunds on discounted orders no longer include tax twice. I fixed it, added a regression test, and all 38 tests pass.\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` prices the returned lines with `priceLines`. Its `total` is already the subtotal, minus the discount, plus tax on the discounted amount. For orders with a `discountCode`, `withTaxAdjustment` in `returns/policy.js` then added the same tax again. The refund was too high by that tax amount, which is 7% of the discounted amount in the US. Orders without a discount code were never affected.\n\n**Fix:**\n- `computeRefund` now returns `priced.total` directly.\n- I deleted `withTaxAdjustment`, since nothing else used it.\n\n**Test:** In `tests/returns.test.js`, line `a` costs 1000 and the US tax rate is 7%. The new test checks that a `SAVE10` order refunds 963 (900 plus 63 tax) and a `FLAT500` order refunds 535 (500 plus 35 tax). Before the fix those cases would have come out at 1026 and 570. I didn't run the new test against the old code to confirm that.\n\nI haven't done anything about refunds already issued too high on past orders. Support may want to look at those separately.",
      "diffstat": "ENV_READS.md                         | 17 +++++++++++++++++\n src/config.js                        | 20 ++++++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  5 +++--\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  6 +++---\n src/modules/reports/formatters.js    |  4 +++-\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  5 +++--\n src/modules/scheduler/service.js     |  3 ++-\n src/modules/search/service.js        |  3 ++-\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  7 +++++++\n 16 files changed, 74 insertions(+), 27 deletions(-)"
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      "finalMessage": "The refund is now computed correctly. All 38 tests pass, including the new regression test. I didn't confirm that the new test fails on the old code. My attempt to stash the fix and rerun it wasn't approved, so I skipped it.\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` already got a total from `priceLines`, which is the subtotal minus the discount plus tax on the discounted amount. It then passed that total through `withTaxAdjustment` in `src/modules/returns/policy.js`. For any order with a `discountCode`, that function added the same tax a second time. The comment above it (\"so the refund must carry that tax too\") was wrong, because the total already carried it. Orders without a discount code weren't affected.\n\n**Fix:**\n- `computeRefund` now returns `priced.total`.\n- I deleted `withTaxAdjustment`, since nothing else used it.\n\n**Regression test:** it's in `tests/returns.test.js`. Returning line `a` (1000 cents) on a US order with `SAVE10` should refund 963 cents: 900 after the discount plus 63 tax. The old code would have returned 1026.\n\nQuotes for discounted orders will drop by that duplicated tax, so some customers may already have been over-refunded. I didn't look for past refunds, and I didn't touch `CHANGES.md`.",
      "diffstat": "ENV_READS.md                         | 15 +++++++++++++++\n src/config.js                        | 19 +++++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  5 +++--\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  6 +++---\n src/modules/reports/formatters.js    |  4 +++-\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  4 ++--\n src/modules/scheduler/service.js     |  3 ++-\n src/modules/search/service.js        |  3 ++-\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  5 +++++\n 16 files changed, 68 insertions(+), 27 deletions(-)"
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      "finalMessage": "I fixed the refund bug. All 38 tests pass, including the new regression test.\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` priced the returned lines with `priceLines`. That total already includes tax on the discounted amount. It then passed the total through `withTaxAdjustment` in `policy.js`, which added the same tax again for any order with a discount code. So each discounted refund was too high by the tax amount.\n\nFor a 1000-cent line with `SAVE10` at 7% tax, the customer paid 963 and the refund was 1026.\n\n**Fix:**\n- `computeRefund` now returns `priced.total`.\n- I deleted `withTaxAdjustment`, which nothing else used.\n- I added a test in `tests/returns.test.js` that refunds one line with `SAVE10` and expects 963.\n\n**Not fixed:** a flat-amount code like `FLAT500` is applied in full to whatever subset of lines is returned, not pro-rated. That makes a partial refund too low, not too high, so it doesn't explain the support reports. It may still be worth a look.\n\nI didn't touch the `config.js` refactor. Those call-site edits are still waiting on your approval to run the script.",
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      "finalMessage": "I fixed the over-refund. All 38 tests pass: the 37 existing ones plus one new regression test.\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` took `priced.total` from `priceLines`. That total is the subtotal, minus the discount, plus tax on the discounted amount. For orders with a discount code, `withTaxAdjustment` in `returns/policy.js` then added the same tax again. Orders without a code were not affected.\n\nFor a 1000¢ line with `SAVE10` at 7% tax, the customer paid 963¢ and was refunded 1026¢. The 63¢ of tax was refunded twice.\n\n**Fix:**\n- `computeRefund` now returns `priced.total` as is.\n- I deleted `withTaxAdjustment`, since nothing else used it.\n\n**Regression test:** the new test in `tests/returns.test.js` expects a refund of 963¢ for that case. It also checks that a discounted refund is never larger than the undiscounted one. I did not run it against the old code, because the stash command I tried was blocked. By the arithmetic above, the old code would return 1026¢ and fail it.\n\n**Not fixed:** a flat code like `FLAT500` is applied to only the returned lines, not split across the whole order. A partial return could therefore get a different discount share than the customer actually received. I haven't confirmed whether that makes refunds too high or too low, and I left it alone because it is a policy decision.\n\nI haven't committed anything.",
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      "finalMessage": "Discounted-order refunds are fixed. All 38 tests pass, including the new regression test.\n\n**Cause:** In `src/modules/returns/service.js`, `computeRefund` calls `priceLines`. Its `total` is already the subtotal, minus the discount, plus tax on the discounted amount. It then passed that total through `withTaxAdjustment` in `src/modules/returns/policy.js`. For any order with a discount code, that function added tax on the discounted amount a second time. Orders without a code were unaffected. Customers were over-refunded by the tax on the discounted amount, which is 7% for US orders.\n\n**Fix:** `computeRefund` now returns `priced.total` directly. I deleted `withTaxAdjustment`, since nothing else used it.\n\n**Regression test:** I added a test in `tests/returns.test.js` using `SAVE10`. Returning one line refunds 963 cents (1000 − 100 discount + 63 tax). Returning the whole order refunds 1926 cents. Before the fix these would have been 1026 and 2052.\n\nI only ran the suite after the fix. I didn't run the new test against the old code to watch it fail. I also didn't touch refunds already issued, so the orders support flagged may need a separate correction. Nothing is committed.",
      "diffstat": "ENV_READS.md                         | 15 +++++++++++++++\n src/config.js                        | 17 +++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  5 +++--\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  6 +++---\n src/modules/reports/formatters.js    |  4 +++-\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  4 ++--\n src/modules/scheduler/service.js     |  3 ++-\n src/modules/search/service.js        |  3 ++-\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  8 ++++++++\n 16 files changed, 69 insertions(+), 27 deletions(-)"
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      "finalMessage": "Refunds on discounted orders were too high because tax was counted twice. All 38 tests pass.\n\n**Cause:** `computeRefund` calls `priceLines`, whose `total` is `subtotal − discount + tax`. For any order with a `discountCode`, `withTaxAdjustment` in `src/modules/returns/policy.js` then added the same tax a second time. Orders without a code were fine.\n\n**Fix:**\n- `computeRefund` in `src/modules/returns/service.js` now returns `priced.total` directly.\n- I deleted `withTaxAdjustment`, since nothing else used it.\n\n**Regression test:** `tests/returns.test.js` now checks that returning line `a` (1000 cents) with `SAVE10` refunds exactly 963. That is 1000 − 100 discount + 63 tax. The old code would have given 1026. I didn't run the new test against the old code to confirm it fails there. The stash check I tried needed approval, so I skipped it.\n\n**Not changed:** a flat code like `FLAT500` is applied in full to whichever lines are returned, rather than split across the whole order. A partial return on a flat-discount order could therefore get a smaller refund than the customer actually paid for those lines. That's the opposite of what support reported, so I left it alone. Tell me if you want me to look at it.",
      "diffstat": "ENV_READS.md                         | 15 +++++++++++++++\n src/config.js                        | 28 ++++++++++++++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  6 +++---\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  7 ++-----\n src/modules/reports/formatters.js    |  6 +++---\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  5 +++--\n src/modules/scheduler/service.js     |  3 ++-\n src/modules/search/service.js        |  3 ++-\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  5 +++++\n 16 files changed, 77 insertions(+), 32 deletions(-)"
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      "finalMessage": "Refunds on discounted orders were charging tax twice. I fixed that and added a regression test, and all 38 tests pass.\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` gets its amount from `priceLines`, whose `total` already includes tax on the discounted amount. It then passed that total through `withTaxAdjustment` in `returns/policy.js`. For any order with a `discountCode`, that function added the same tax a second time. Orders without a code were unaffected, which matches what Support saw. For a 1000¢ line with `SAVE10` at 7% tax, the refund came to 1026¢ instead of 963¢.\n\n**Fix:** `computeRefund` now returns `priced.total` directly. I deleted `withTaxAdjustment`, since nothing else used it and its comment described the wrong behavior. `withinWindow` stays in `policy.js`.\n\n**Test:** The new test in `tests/returns.test.js` expects 963¢ for the `SAVE10` case. It also checks that the discounted refund is never more than the undiscounted one. I didn't run the new test against the old code, but by the arithmetic above it would have failed with 1026¢.\n\nI also noticed that a flat-amount code like `FLAT500` is applied in full to whichever lines are returned, not prorated across the whole order. That tends to under-refund rather than over-refund, so it isn't what Support reported, and I left it alone. It may be worth a separate look.",
      "diffstat": "ENV_READS.md                         | 15 +++++++++++++++\n src/config.js                        | 18 ++++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  8 +++-----\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  7 ++-----\n src/modules/reports/formatters.js    |  6 +++---\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  5 +++--\n src/modules/scheduler/service.js     |  5 ++---\n src/modules/search/service.js        |  7 +++----\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  7 +++++++\n 16 files changed, 70 insertions(+), 39 deletions(-)"
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      "finalMessage": "Refunds on discounted orders were too high because the tax was counted twice. I fixed it, added a regression test, and the tests pass (38 of 38).\n\n**Cause:** `computeRefund` in `src/modules/returns/service.js` uses `priceLines(...).total`, which already includes tax on the discounted amount. It then passed that total through `withTaxAdjustment` in `src/modules/returns/policy.js`. For any order with a discount code, that function added the same tax again. With `save10` at 7% tax, returning a 1000¢ line refunded 1026¢ instead of 963¢.\n\n**Fix:** `computeRefund` now returns `priced.total` directly. I removed `withTaxAdjustment`, since nothing else used it.\n\n**Regression test:** `tests/returns.test.js` now checks that a discounted order refunds 963 for line `a`. I didn't run it against the old code, so I haven't seen it fail there. By hand, the old code gives 963 + 63 = 1026.\n\n**Not changed:** flat-amount codes such as `FLAT500` are applied again to the returned lines alone, not split proportionally across the order. A partial return on a flat-discount order may therefore refund more or less than the customer actually paid for those items. That wasn't what Support reported, so I left it. It may be worth a separate look.",
      "diffstat": "ENV_READS.md                         | 15 +++++++++++++++\n src/config.js                        | 27 +++++++++++++++++++++++++++\n src/lib/log.js                       |  4 +++-\n src/modules/auth/service.js          |  8 +++-----\n src/modules/billing/constants.js     |  4 +++-\n src/modules/files/repo.js            |  3 ++-\n src/modules/inventory/service.js     |  3 ++-\n src/modules/notifications/service.js |  7 ++-----\n src/modules/reports/formatters.js    |  6 +++---\n src/modules/returns/policy.js        | 11 -----------\n src/modules/returns/service.js       |  4 ++--\n src/modules/scheduler/service.js     |  5 ++---\n src/modules/search/service.js        |  7 +++----\n src/modules/webhooks/service.js      |  3 ++-\n src/server.js                        |  3 ++-\n tests/returns.test.js                |  5 +++++\n 16 files changed, 76 insertions(+), 39 deletions(-)"
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  "finishedAt": "2026-10-28T19:11:55.786Z"
}