100 lines
4.2 KiB
Markdown
100 lines
4.2 KiB
Markdown
# CLAUDE.md
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This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
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Default to using Bun instead of Node.js.
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- Use `bun <file>` instead of `node <file>` or `ts-node <file>`
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- Use `bun test` instead of `jest` or `vitest`
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- Use `bun install` instead of `npm install` or `yarn install`
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- Use `bun run <script>` instead of `npm run <script>`
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- Bun automatically loads .env, so don't use dotenv.
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## APIs
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- `bun:sqlite` for SQLite. Don't use `better-sqlite3`.
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- `Bun.redis` for Redis. Don't use `ioredis`.
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- Prefer `Bun.file` over `node:fs`'s readFile/writeFile.
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- `Bun.$\`cmd\`` instead of execa.
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## Commands
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```sh
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# Run all tests
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bun test
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# Run a single test file
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bun test src/supplier-scoring.test.ts
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# Type-check (no emit)
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./node_modules/.bin/tsc --noEmit
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# ASIN lead-list pipeline (LLM-based)
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bun run src/index.ts input/leads.xlsx --out output/results.xlsx
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# Supplier UPC pipeline (deterministic)
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bun run upc-file --input input/supplier.xlsx --out output/supplier_ranked.xlsx
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# Category discovery pipelines
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bun run bestsellers
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bun run monthly-sold
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bun run mid-range
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# Web API server
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bun run start:web # http://localhost:3000
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# SP-API connectivity tests
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bun run src/sp-test.ts
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bun run src/sp-test.ts B07SN9BHVV
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bun run src/sp-test.ts --sellability B07SN9BHVV
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```
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## Architecture
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Two distinct analysis pipelines share infrastructure (Keepa, SP-API, Redis, SQLite) but diverge in how they produce verdicts.
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### ASIN Lead-list Pipeline (`src/index.ts` → `src/analysis-pipeline.ts`)
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For spreadsheets containing known ASINs. Verdict is LLM-based (FBA/FBM/SKIP via LM Studio).
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Flow: `reader.ts` parse → Redis cache check → `sp-api.ts` sellability gate (5 concurrent workers) → `keepa.ts` batch enrichment → `sp-api.ts` pricing + FBA fees (5 concurrent workers) → `llm.ts` batched analysis (5 products/batch) → `writer.ts` XLSX + SQLite.
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### Supplier UPC Pipeline (`src/upc-file-analysis.ts`)
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For supplier price lists containing UPC/EAN values. Verdict is deterministic (BUY/WATCH/SKIP); never calls LM Studio.
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Flow: `upc-file-reader.ts` streaming parse (`.xlsx`) or row-window parse (`.xls`) → SP-API catalog UPC lookup first, Keepa UPC lookup as fallback → `keepa.ts` demand enrichment → `sp-api.ts` sellability + FBA fees → `supplier-scoring.ts` deterministic score → `supplier-export.ts` Excel workbook (`Ranked Leads`, `Skipped`, `Summary` sheets) + SQLite.
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UPC resolution priority: SP-API catalog lookup → Keepa fallback (for no-match or request failure only).
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### Category Pipelines
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`bestsellers-by-category.ts`, `top-monthly-sold-by-category.ts`, `mid-range-sellers-by-category.ts` — Keepa category browsing → SP-API sellability gate → LLM verdict. Each saves results to SQLite. Mid-range applies configurable filters (monthly sold, price, seller count, Amazon buy box share).
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### Shared Infrastructure
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| Module | Role |
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|--------|------|
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| `src/types.ts` | All shared interfaces (`ProductRecord`, `KeepaData`, `SpApiData`, `SupplierScore`, etc.) |
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| `src/config.ts` | Env var loading via `Bun.env` |
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| `src/keepa.ts` | Keepa API: batch ASIN fetch, UPC lookup, auto rate-limiting on token exhaustion |
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| `src/sp-api.ts` | SP-API: sellability (`getListingsRestrictions`), pricing+fees, UPC catalog lookup |
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| `src/cache.ts` | Redis caching (24h TTL for lead-list; 12h for mid-range) |
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| `src/database.ts` | SQLite `runs` + `results` tables; auto-creates `db/results.db` |
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| `src/server.ts` | Bun HTTP server exposing REST endpoints for both pipelines |
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### File Layout
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- `input/` — source spreadsheets (git-ignored)
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- `output/` — generated workbooks (git-ignored)
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- `db/` — SQLite files (git-ignored)
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- `src/` — all source and test files
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## Project Rules
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- Keep the ASIN lead-list and category flows compatible with their current LLM-based FBA/FBM/SKIP analysis.
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- The supplier UPC pipeline must not call LM Studio.
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- Supplier UPC files resolve UPC/EAN through SP-API catalog lookup first; Keepa UPC lookup is fallback only (no-match or request-failure cases).
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- Supplier workbook output must keep `Ranked Leads`, `Skipped`, and `Summary` sheets.
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- When changing UPC supplier behavior, cover SP-API UPC parsing, deterministic scoring, and workbook export with `bun test`.
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