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HackBrowserData/CLAUDE.md
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Roger 5f42d4fe5f refactor: redesign logging system for CLI-friendly output (#561)
* refactor: redesign logging system for CLI-friendly output
* refactor: remove ANSI color support from logger
* fix: address PR review feedback
2026-04-07 16:50:01 +08:00

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# CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
## Security Notice
This project is for security research and defensive purposes only. Do not generate code that could be used for unauthorized access. All security research must be conducted ethically and within legal boundaries.
## Project Overview
HackBrowserData is a CLI security research tool for extracting and decrypting browser data across Windows, macOS, and Linux. It supports Chromium-based browsers and Firefox.
**Constraint**: Must build with Go 1.20 (Windows 7 support). Do not use features from Go 1.21+ (e.g., `log/slog`, `slices`, `maps`, `cmp` packages).
## Development Commands
```bash
# Build (use go@1.20 for module operations)
go build ./cmd/hack-browser-data/
# Cross-compile
GOOS=windows GOARCH=amd64 go build ./cmd/hack-browser-data/
GOOS=linux GOARCH=amd64 go build ./cmd/hack-browser-data/
# Test
go test ./...
go test -v ./... -covermode=count -coverprofile=coverage.out
# Lint (requires golangci-lint v2)
golangci-lint run
# Format (gofumpt is stricter than gofmt)
gofumpt -l -w .
goimports -w -local github.com/moond4rk/hackbrowserdata .
# Spelling
typos
# Dependencies (MUST use go@1.20 to avoid bumping go directive)
# export GOROOT=$(brew --prefix go@1.20)/libexec && export PATH=$GOROOT/bin:$PATH
go mod tidy
go mod verify
```
## Code Conventions
- **Platform code**: use build tags (`_darwin.go`, `_windows.go`, `_linux.go`)
- **Error handling**: `fmt.Errorf("context: %w", err)` for wrapping, never `_ =` to ignore errors
- **Logging**: `log.Debugf` for record-level diagnostics, `log.Infof` for user-facing progress/status, `log.Warnf` for unexpected conditions. Extract methods should return errors, not log them.
- **Naming**: follow Go conventions — `Config` not `BrowserConfig`, `Extract` not `BrowsingData`
- **Tests**: use `t.TempDir()` for filesystem tests, `go-sqlmock` for database tests
- **Architecture**: see `rfcs/` for design documents
## Key Constraints
- `modernc.org/sqlite` pinned at v1.31.1 (v1.32+ requires Go 1.21)
- `golang.org/x/text` will be removed in refactoring (use 3-byte UTF-8 BOM instead)
- No `pkg/` + `internal/` directory structure — keep it simple
- No root-level library API — CLI calls `browser.PickBrowsers()` directly