build: adopt Turborepo's experimental Go workspace support

.changeset/config.json

@@ -7,5 +7,5 @@
   "access": "public",
   "baseBranch": "main",
   "updateInternalDependencies": "patch",
-  "ignore": ["web", "@pigo/api", "@pigo/typescript-config"]
+  "ignore": ["web", "@pigo/typescript-config"]
 }

.changeset/nervous-cars-dance.md

@@ -0,0 +1,4 @@
+---
+---
+
+Move the Go modules onto Turborepo's experimental Go workspace support. Build tooling only; no change to the published library.

README.md

@@ -10,16 +10,18 @@ A minimal-dependency, minimal-configuration image optimizer with a Go API backen
 - **Go API backend**: A REST server built on the standard library's JPEG and PNG codecs, with Catmull-Rom interpolation for resizing.
 - **Next.js frontend**: Drag-and-drop uploads, clipboard paste, ZIP downloads, and a before/after comparison slider.
 - **Zero heavy runtime dependencies**: The backend builds and runs without C libraries, GraphicsMagick, or libvips.
-- **Turborepo monorepo**: Bun workspaces handle builds and package management.
+- **Turborepo monorepo**: Bun workspaces and `go.work` modules share one task graph and one cache.
 
 ## Tech stack
 
 - **Backend**: Go (1.26+), [`chi`](https://github.com/go-chi/chi) router, `golang.org/x/image/draw`
 - **Frontend**: Next.js (16.3+), React 19, Tailwind CSS v4, Lucide Icons, JSZip
-- **Tooling**: Bun, Turborepo, [Ultracite](https://github.com/PunGrumpy/ultracite) (Oxlint + Oxfmt), Air (Go hot-reloading)
+- **Tooling**: Bun, Turborepo (with experimental Go workspace support), [Ultracite](https://github.com/PunGrumpy/ultracite) (Oxlint + Oxfmt)
 
 ## Project structure
 
+Two apps and two shared packages, split across a Bun workspace and a Go workspace:
+
 ```text
 pigo/
 ├── apps/
@@ -28,9 +30,21 @@ pigo/
 ├── packages/
 │   ├── core/                # Go image decoding, encoding, and resizing
 │   └── typescript-config/   # Shared TypeScript configs
-└── package.json             # Workspace configuration
+├── go.work                  # Go workspace; its members are Turborepo packages
+└── package.json             # Bun workspace configuration
 ```
 
+The Go modules (`apps/api`, `packages/core`) have no `package.json`. Turborepo reads them from `go.work` and derives their tasks, so you target a module by its directory or by its module path:
+
+```bash
+turbo run build --filter=./apps/api
+turbo run build --filter=github.com/PunGrumpy/pigo/apps/api
+```
+
+`turbo run test` and `turbo run lint` cover every Go module in one pass, through a package Turborepo names `go-workspace`. Filtering to a single module runs `go test ./...` inside that module instead.
+
+Vercel builds both apps without `turbo`. The flag makes Turborepo shell out to `go work edit -json` on every invocation, so a Next.js build image with no Go toolchain can no longer run it. Each app's `vercel.json` sets an explicit `buildCommand` that skips Turborepo, and the Go one writes to `$VERCEL_OUTPUT_FILE` so the platform finds the binary wherever the build runs from.
+
 ## Getting started
 
 ### Prerequisites
@@ -39,7 +53,6 @@ Make sure you have the following installed:
 
 - [Go](https://go.dev/doc/install) (1.26 or later)
 - [Bun](https://bun.sh) (1.3.14 or later)
-- [Air](https://github.com/air-verse/air), optional, for API hot-reloading
 
 ### Installation
 

apps/api/vercel.json

@@ -1,6 +1,7 @@
 {
   "$schema": "https://openapi.vercel.sh/vercel.json",
   "framework": "go",
+  "buildCommand": "go build -o \"$VERCEL_OUTPUT_FILE\" github.com/PunGrumpy/pigo/apps/api",
   "redirects": [
     {
       "source": "/",

apps/web/vercel.json

@@ -0,0 +1,5 @@
+{
+  "$schema": "https://openapi.vercel.sh/vercel.json",
+  "framework": "nextjs",
+  "buildCommand": "bun run --filter web build"
+}

package.json

@@ -12,8 +12,8 @@
     "dev": "turbo run dev",
     "typecheck": "turbo run typecheck",
     "test": "turbo run test",
-    "check": "turbo run check && ultracite check",
-    "fix": "turbo run fix && ultracite fix",
+    "check": "turbo run lint && ultracite check",
+    "fix": "turbo run format && ultracite fix",
     "changeset": "changeset",
     "changeset:version": "changeset version",
     "changeset:publish": "turbo run build && changeset publish",
@@ -26,7 +26,7 @@
     "oxfmt": "^0.62.0",
     "oxlint": "^1.77.0",
     "react-doctor": "^0.9.5",
-    "turbo": "^2.10.8",
+    "turbo": "^2.10.13",
     "typescript": "^7.0.2",
     "ultracite": "7.10.1"
   },

packages/core/package.json

@@ -2,11 +2,5 @@
   "name": "@pigo/core",
   "version": "0.1.1",
   "private": true,
-  "description": "Core image processing library for Pigo",
-  "type": "module",
-  "scripts": {
-    "test": "go test ./...",
-    "check": "go vet ./...",
-    "typecheck": "go vet ./..."
-  }
+  "description": "Core image processing library for Pigo"
 }

turbo.json

@@ -1,5 +1,9 @@
 {
   "$schema": "https://turbo.build/schema.json",
+  "futureFlags": {
+    "experimentalGoWorkspaces": true,
+    "experimentalTaskCommand": true
+  },
   "ui": "tui",
   "envMode": "loose",
   "tasks": {
@@ -11,7 +15,7 @@
         "VERCEL",
         "VERCEL_ENV"
       ],
-      "outputs": ["bin/**", "dist/**", ".next/**", "!.next/cache/**"]
+      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
     },
     "dev": {
       "cache": false,
@@ -21,16 +25,18 @@
       "dependsOn": ["^build"],
       "outputs": []
     },
-    "check": {
-      "cache": false,
+    "test": {
       "outputs": []
     },
-    "fix": {
-      "cache": false,
+    "lint": {
       "outputs": []
     },
-    "test": {
-      "outputs": []
+    "format": {
+      "cache": false,
+      "outputs": [],
+      "command": {
+        "go": ["gofmt", "-l", "-w", "."]
+      }
     }
   }
 }