feat: implement initial Go application with CLI, web UI, and core functionalities.

.gitignore

@@ -3,6 +3,7 @@ node_modules/
 
 # Build output
 dist/
+go-source/.gocache/
 
 # Environment
 .env
@@ -24,3 +25,4 @@ npm-debug.log*
 
 # Test coverage
 coverage/
+go-source/difflearn-go

go-source/README.md

@@ -0,0 +1,36 @@
+# DiffLearn Go Port
+
+This folder contains a Go port of DiffLearn, designed to run alongside the original Bun/TypeScript source.
+
+## Run
+
+```bash
+cd go-source
+go mod tidy
+go run ./cmd/difflearn
+```
+
+## Test
+
+```bash
+cd go-source
+go test ./...
+```
+
+## Commands
+
+- `difflearn` (interactive dashboard)
+- `difflearn local [--staged]`
+- `difflearn commit <sha> [--compare <sha2>]`
+- `difflearn branch <branch1> <branch2>`
+- `difflearn explain [--staged]`
+- `difflearn review [--staged]`
+- `difflearn summary [--staged]`
+- `difflearn export --format markdown|json|terminal [--staged]`
+- `difflearn history [-n 10]`
+- `difflearn web [-p 3000]`
+- `difflearn config`
+- `difflearn serve-mcp`
+- `difflearn update`
+
+The Go port reuses the same `~/.difflearn` config file format and compatible environment variables.

go-source/cmd/difflearn/main.go

@@ -0,0 +1,9 @@
+package main
+
+import "difflearn-go/internal/cli"
+
+func main() {
+	if err := cli.Execute(); err != nil {
+		cli.PrintErrAndExit(err)
+	}
+}

go-source/go.mod

@@ -0,0 +1,34 @@
+module difflearn-go
+
+go 1.22
+
+require (
+	github.com/charmbracelet/bubbletea v0.26.6
+	github.com/charmbracelet/lipgloss v0.13.0
+	github.com/fatih/color v1.17.0
+	github.com/spf13/cobra v1.8.1
+)
+
+require (
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/charmbracelet/x/ansi v0.1.4 // indirect
+	github.com/charmbracelet/x/input v0.1.0 // indirect
+	github.com/charmbracelet/x/term v0.1.1 // indirect
+	github.com/charmbracelet/x/windows v0.1.0 // indirect
+	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/termenv v0.15.2 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	golang.org/x/sync v0.7.0 // indirect
+	golang.org/x/sys v0.21.0 // indirect
+	golang.org/x/text v0.3.8 // indirect
+)

go-source/go.sum

@@ -0,0 +1,61 @@
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