Feat: Backend scaffolding and local dev stack

.gitignore

@@ -21,3 +21,7 @@ pnpm-debug.log*
 # OS / editor files
 .DS_Store
 .idea/
+
+# Go build output
+tmp/
+bin/

Backend/.air.api.toml

@@ -0,0 +1,52 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp/dev"
+
+[build]
+args_bin = []
+bin = "./tmp/dev/bin/api"
+cmd = "go build -o ./tmp/dev/bin/api ./cmd/api"
+delay = 1000
+exclude_dir = ["tmp", "vendor", "testdata"]
+exclude_file = []
+exclude_regex = ["_test.go"]
+exclude_unchanged = false
+follow_symlink = false
+full_bin = ""
+include_dir = []
+include_ext = ["go", "sql"]
+include_file = []
+kill_delay = "0s"
+log = "tmp/dev/logs/build-errors.api.log"
+poll = false
+poll_interval = 0
+post_cmd = []
+pre_cmd = []
+rerun = false
+rerun_delay = 500
+send_interrupt = false
+stop_on_error = true
+
+[color]
+app = ""
+build = "yellow"
+main = "magenta"
+runner = "green"
+watcher = "cyan"
+
+[log]
+main_only = false
+silent = false
+time = true
+
+[misc]
+clean_on_exit = false
+
+[proxy]
+app_port = 0
+enabled = false
+proxy_port = 0
+
+[screen]
+clear_on_rebuild = true
+keep_scroll = true

Backend/.air.web.toml

@@ -0,0 +1,52 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp/dev"
+
+[build]
+args_bin = []
+bin = "./tmp/dev/bin/web"
+cmd = "go build -o ./tmp/dev/bin/web ./cmd/web"
+delay = 1000
+exclude_dir = ["tmp", "vendor", "testdata"]
+exclude_file = []
+exclude_regex = ["_test.go"]
+exclude_unchanged = false
+follow_symlink = false
+full_bin = ""
+include_dir = []
+include_ext = ["go", "sql"]
+include_file = []
+kill_delay = "0s"
+log = "tmp/dev/logs/build-errors.web.log"
+poll = false
+poll_interval = 0
+post_cmd = []
+pre_cmd = []
+rerun = false
+rerun_delay = 500
+send_interrupt = false
+stop_on_error = true
+
+[color]
+app = ""
+build = "yellow"
+main = "magenta"
+runner = "green"
+watcher = "cyan"
+
+[log]
+main_only = false
+silent = false
+time = true
+
+[misc]
+clean_on_exit = false
+
+[proxy]
+app_port = 0
+enabled = false
+proxy_port = 0
+
+[screen]
+clear_on_rebuild = true
+keep_scroll = true

Backend/.air.worker.toml

@@ -0,0 +1,52 @@
+root = "."
+testdata_dir = "testdata"
+tmp_dir = "tmp/dev"
+
+[build]
+args_bin = []
+bin = "./tmp/dev/bin/worker"
+cmd = "go build -o ./tmp/dev/bin/worker ./cmd/worker"
+delay = 1000
+exclude_dir = ["tmp", "vendor", "testdata"]
+exclude_file = []
+exclude_regex = ["_test.go"]
+exclude_unchanged = false
+follow_symlink = false
+full_bin = ""
+include_dir = []
+include_ext = ["go", "sql"]
+include_file = []
+kill_delay = "0s"
+log = "tmp/dev/logs/build-errors.worker.log"
+poll = false
+poll_interval = 0
+post_cmd = []
+pre_cmd = []
+rerun = false
+rerun_delay = 500
+send_interrupt = false
+stop_on_error = true
+
+[color]
+app = ""
+build = "yellow"
+main = "magenta"
+runner = "green"
+watcher = "cyan"
+
+[log]
+main_only = false
+silent = false
+time = true
+
+[misc]
+clean_on_exit = false
+
+[proxy]
+app_port = 0
+enabled = false
+proxy_port = 0
+
+[screen]
+clear_on_rebuild = true
+keep_scroll = true

Backend/.dockerignore

@@ -0,0 +1,4 @@
+.git
+.gitignore
+tmp
+testdata

Backend/Dockerfile

@@ -0,0 +1,36 @@
+# syntax=docker/dockerfile:1.7
+
+FROM golang:1.25.7-alpine AS base
+
+WORKDIR /app
+
+RUN apk add --no-cache ca-certificates curl git tzdata && update-ca-certificates
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+FROM base AS development
+
+RUN curl -fsSL https://raw.githubusercontent.com/air-verse/air/master/install.sh | sh -s -- -b /usr/local/bin
+
+COPY . .
+
+CMD ["air", "-c", ".air.web.toml"]
+
+FROM base AS builder
+
+ARG SERVICE_NAME=web
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /out/app ./cmd/${SERVICE_NAME}
+
+FROM alpine:3.22 AS runtime
+
+RUN apk add --no-cache ca-certificates tzdata && update-ca-certificates
+
+WORKDIR /app
+
+COPY --from=builder /out/app /usr/local/bin/app
+
+CMD ["/usr/local/bin/app"]

Backend/cmd/api/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"log"
+
+	"moku-backend/internal/bootstrap"
+	"moku-backend/internal/httpx"
+	"moku-backend/internal/process"
+)
+
+func main() {
+	app, err := bootstrap.New("api")
+	if err != nil {
+		log.Fatalf("bootstrap api service: %v", err)
+	}
+	defer func() {
+		if closeErr := app.Close(); closeErr != nil {
+			app.Logger.Error("close api service", "error", closeErr)
+		}
+	}()
+
+	handler := httpx.NewRouter(httpx.RouterConfig{
+		ServiceName: app.ServiceName,
+		Config:      app.Config,
+		Logger:      app.Logger,
+		BuildInfo:   app.BuildInfo,
+		Database:    app.Database,
+		Cache:       app.Cache,
+	})
+
+	if err := process.RunHTTPServer(app.ServiceName, app.Config.Address(app.ServiceName), handler, app.Logger, app.Config.ShutdownTimeout); err != nil {
+		app.Logger.Error("api service stopped", "error", err)
+		log.Fatal(err)
+	}
+}

Backend/cmd/migrate/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"moku-backend/internal/config"
+	"moku-backend/internal/database"
+)
+
+func main() {
+	cfg := config.Load()
+
+	db, err := database.NewPostgres(cfg.PostgresURL)
+	if err != nil {
+		log.Fatalf("connect database for migrations: %v", err)
+	}
+	defer db.Close()
+
+	command := "up"
+	if len(os.Args) > 1 {
+		command = os.Args[1]
+	}
+
+	switch command {
+	case "up":
+		if err := db.MigrateUp(); err != nil {
+			log.Fatalf("run migrations: %v", err)
+		}
+		fmt.Println("migrations applied")
+	case "down":
+		if err := db.MigrateDown(); err != nil {
+			log.Fatalf("roll back migration: %v", err)
+		}
+		fmt.Println("latest migration rolled back")
+	case "reset":
+		if err := db.MigrateReset(); err != nil {
+			log.Fatalf("reset migrations: %v", err)
+		}
+		fmt.Println("migrations reset")
+	case "status":
+		if err := db.MigrateStatus(); err != nil {
+			log.Fatalf("show migration status: %v", err)
+		}
+	default:
+		log.Fatalf("unsupported migrate command %q (supported: up, down, reset, status)", command)
+	}
+}

Backend/cmd/web/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"log"
+
+	"moku-backend/internal/bootstrap"
+	"moku-backend/internal/httpx"
+	"moku-backend/internal/process"
+)
+
+func main() {
+	app, err := bootstrap.New("web")
+	if err != nil {
+		log.Fatalf("bootstrap web service: %v", err)
+	}
+	defer func() {
+		if closeErr := app.Close(); closeErr != nil {
+			app.Logger.Error("close web service", "error", closeErr)
+		}
+	}()
+
+	handler := httpx.NewRouter(httpx.RouterConfig{
+		ServiceName: app.ServiceName,
+		Config:      app.Config,
+		Logger:      app.Logger,
+		BuildInfo:   app.BuildInfo,
+		Database:    app.Database,
+		Cache:       app.Cache,
+	})
+
+	if err := process.RunHTTPServer(app.ServiceName, app.Config.Address(app.ServiceName), handler, app.Logger, app.Config.ShutdownTimeout); err != nil {
+		app.Logger.Error("web service stopped", "error", err)
+		log.Fatal(err)
+	}
+}

Backend/cmd/worker/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"log"
+
+	"moku-backend/internal/bootstrap"
+	"moku-backend/internal/process"
+)
+
+func main() {
+	app, err := bootstrap.New("worker")
+	if err != nil {
+		log.Fatalf("bootstrap worker service: %v", err)
+	}
+	defer func() {
+		if closeErr := app.Close(); closeErr != nil {
+			app.Logger.Error("close worker service", "error", closeErr)
+		}
+	}()
+
+	app.Logger.Info("worker ready", "service", app.ServiceName, "environment", app.Config.Environment)
+
+	if err := process.WaitForShutdown(app.ServiceName, app.Logger); err != nil {
+		app.Logger.Error("worker stopped", "error", err)
+		log.Fatal(err)
+	}
+}

Backend/db/embed.go

@@ -0,0 +1,6 @@
+package db
+
+import "embed"
+
+//go:embed migrations/*.sql
+var Migrations embed.FS

Backend/db/migrations/000001_init.sql

@@ -0,0 +1,26 @@
+-- +goose Up
+CREATE EXTENSION IF NOT EXISTS "pgcrypto";
+
+CREATE TABLE IF NOT EXISTS organizations (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  name TEXT NOT NULL,
+  slug TEXT NOT NULL UNIQUE,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE TABLE IF NOT EXISTS workspaces (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  organization_id UUID NOT NULL REFERENCES organizations(id) ON DELETE CASCADE,
+  name TEXT NOT NULL,
+  slug TEXT NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE (organization_id, slug)
+);
+
+CREATE INDEX IF NOT EXISTS idx_workspaces_organization_id ON workspaces (organization_id);
+
+-- +goose Down
+DROP TABLE IF EXISTS workspaces;
+DROP TABLE IF EXISTS organizations;

Backend/db/queries/organizations.sql

@@ -0,0 +1,15 @@
+-- name: ListOrganizations :many
+SELECT id, name, slug, created_at, updated_at
+FROM organizations
+ORDER BY created_at DESC;
+
+-- name: CreateOrganization :one
+INSERT INTO organizations (name, slug)
+VALUES ($1, $2)
+RETURNING id, name, slug, created_at, updated_at;
+
+-- name: ListWorkspacesByOrganization :many
+SELECT id, organization_id, name, slug, created_at, updated_at
+FROM workspaces
+WHERE organization_id = $1
+ORDER BY created_at DESC;

Backend/docker-bake.hcl

@@ -0,0 +1,36 @@
+variable "REGISTRY" {
+  default = "registry.example.com"
+}
+
+variable "TAG" {
+  default = "latest"
+}
+
+target "_app" {
+  context    = "."
+  dockerfile = "Dockerfile"
+}
+
+target "dev" {
+  inherits = ["_app"]
+  target   = "development"
+  tags     = ["moku/work-backend:dev"]
+}
+
+target "dev-image" {
+  inherits = ["_app"]
+  target   = "development"
+  tags     = ["${REGISTRY}/moku/work-backend:dev-${TAG}"]
+}
+
+group "local" {
+  targets = ["dev"]
+}
+
+group "registry" {
+  targets = ["dev-image"]
+}
+
+group "default" {
+  targets = ["dev"]
+}

Backend/go.mod

@@ -0,0 +1,24 @@
+module moku-backend
+
+go 1.25.7
+
+require (
+	github.com/go-chi/chi/v5 v5.3.0
+	github.com/google/uuid v1.6.0
+	github.com/jackc/pgx/v5 v5.10.0
+	github.com/pressly/goose/v3 v3.27.1
+	github.com/redis/go-redis/v9 v9.20.1
+)
+
+require (
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/mfridman/interpolate v0.0.2 // indirect
+	github.com/sethvargo/go-retry v0.3.0 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/text v0.36.0 // indirect
+)

Backend/go.sum

@@ -0,0 +1,70 @@
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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+golang.org/x/text v0.36.0/go.mod h1:NIdBknypM8iqVmPiuco0Dh6P5Jcdk8lJL0CUebqK164=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/libc v1.72.1 h1:db1xwJ6u1kE3KHTFTTbe2GCrczHPKzlURP0aDC4NGD0=
+modernc.org/libc v1.72.1/go.mod h1:HRMiC/PhPGLIPM7GzAFCbI+oSgE3dhZ8FWftmRrHVlY=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/sqlite v1.49.1 h1:dYGHTKcX1sJ+EQDnUzvz4TJ5GbuvhNJa8Fg6ElGx73U=
+modernc.org/sqlite v1.49.1/go.mod h1:m0w8xhwYUVY3H6pSDwc3gkJ/irZT/0YEXwBlhaxQEew=

Backend/internal/bootstrap/bootstrap.go

@@ -0,0 +1,85 @@
+// Path: Backend/internal/bootstrap/bootstrap.go
+
+package bootstrap
+
+import (
+	"log/slog"
+	"os"
+	"strings"
+
+	"moku-backend/internal/buildinfo"
+	"moku-backend/internal/cache"
+	"moku-backend/internal/config"
+	"moku-backend/internal/database"
+)
+
+type App struct {
+	ServiceName string
+	Config      *config.Config
+	Logger      *slog.Logger
+	BuildInfo   buildinfo.Info
+	Database    *database.DB
+	Cache       *cache.Client
+}
+
+func New(serviceName string) (*App, error) {
+	cfg := config.Load()
+	logger := newLogger(cfg)
+
+	db, err := database.NewPostgres(cfg.PostgresURL)
+	if err != nil {
+		return nil, err
+	}
+
+	valkey, err := cache.NewValkey(cfg.ValkeyURL)
+	if err != nil {
+		db.Close()
+		return nil, err
+	}
+
+	return &App{
+		ServiceName: serviceName,
+		Config:      cfg,
+		Logger:      logger.With("service", serviceName),
+		BuildInfo:   buildinfo.Current(),
+		Database:    db,
+		Cache:       valkey,
+	}, nil
+}
+
+func (a *App) Close() error {
+	var closeErr error
+
+	if a.Cache != nil {
+		if err := a.Cache.Close(); err != nil {
+			closeErr = err
+		}
+	}
+
+	if a.Database != nil {
+		a.Database.Close()
+	}
+
+	return closeErr
+}
+
+func newLogger(cfg *config.Config) *slog.Logger {
+	level := slog.LevelInfo
+
+	switch strings.ToLower(cfg.LogLevel) {
+	case "debug":
+		level = slog.LevelDebug
+	case "warn":
+		level = slog.LevelWarn
+	case "error":
+		level = slog.LevelError
+	}
+
+	options := &slog.HandlerOptions{Level: level}
+
+	if cfg.IsDevelopment() {
+		return slog.New(slog.NewTextHandler(os.Stdout, options))
+	}
+
+	return slog.New(slog.NewJSONHandler(os.Stdout, options))
+}

Backend/internal/buildinfo/buildinfo.go

@@ -0,0 +1,23 @@
+// Path: Backend/internal/buildinfo/buildinfo.go
+
+package buildinfo
+
+var (
+	Version = "dev"
+	Commit  = "unknown"
+	BuiltAt = "unknown"
+)
+
+type Info struct {
+	Version string `json:"version"`
+	Commit  string `json:"commit"`
+	BuiltAt string `json:"builtAt"`
+}
+
+func Current() Info {
+	return Info{
+		Version: Version,
+		Commit:  Commit,
+		BuiltAt: BuiltAt,
+	}
+}

Backend/internal/cache/valkey.go

@@ -0,0 +1,40 @@
+// Path: Backend/internal/cache/valkey.go
+
+package cache
+
+import (
+	"context"
+
+	"github.com/redis/go-redis/v9"
+)
+
+type Client struct {
+	Redis *redis.Client
+}
+
+func NewValkey(valkeyURL string) (*Client, error) {
+	options, err := redis.ParseURL(valkeyURL)
+	if err != nil {
+		return nil, err
+	}
+
+	client := redis.NewClient(options)
+
+	return &Client{Redis: client}, nil
+}
+
+func (c *Client) Health(ctx context.Context) error {
+	if c == nil || c.Redis == nil {
+		return nil
+	}
+
+	return c.Redis.Ping(ctx).Err()
+}
+
+func (c *Client) Close() error {
+	if c == nil || c.Redis == nil {
+		return nil
+	}
+
+	return c.Redis.Close()
+}

Backend/internal/config/config.go

@@ -0,0 +1,79 @@
+// Path: Backend/internal/config/config.go
+
+package config
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	AppName         string
+	Environment     string
+	LogLevel        string
+	WebPort         string
+	APIPort         string
+	WorkerPort      string
+	PostgresURL     string
+	ValkeyURL       string
+	ShutdownTimeout time.Duration
+}
+
+func Load() *Config {
+	return &Config{
+		AppName:         getEnv("APP_NAME", "moku"),
+		Environment:     getEnv("GO_ENV", "development"),
+		LogLevel:        getEnv("LOG_LEVEL", "debug"),
+		WebPort:         getEnv("BACKEND_WEB_PORT", "8080"),
+		APIPort:         getEnv("BACKEND_API_PORT", "8081"),
+		WorkerPort:      getEnv("BACKEND_WORKER_PORT", "8082"),
+		PostgresURL:     getEnv("DATABASE_URL", "postgres://moku:moku_dev_password@localhost:5432/moku?sslmode=disable"),
+		ValkeyURL:       getEnv("VALKEY_URL", "redis://localhost:6379/0"),
+		ShutdownTimeout: getDurationEnv("BACKEND_SHUTDOWN_TIMEOUT", 10*time.Second),
+	}
+}
+
+func (c *Config) Address(serviceName string) string {
+	var port string
+
+	switch strings.ToLower(serviceName) {
+	case "web":
+		port = c.WebPort
+	case "api":
+		port = c.APIPort
+	case "worker":
+		port = c.WorkerPort
+	default:
+		port = c.WebPort
+	}
+
+	return fmt.Sprintf(":%s", port)
+}
+
+func (c *Config) IsDevelopment() bool {
+	return strings.EqualFold(c.Environment, "development")
+}
+
+func getEnv(key, fallback string) string {
+	if value, exists := os.LookupEnv(key); exists {
+		return value
+	}
+
+	return fallback
+}
+
+func getDurationEnv(key string, fallback time.Duration) time.Duration {
+	value, exists := os.LookupEnv(key)
+	if !exists {
+		return fallback
+	}
+
+	parsed, err := time.ParseDuration(value)
+	if err != nil {
+		return fallback
+	}
+
+	return parsed
+}

Backend/internal/database/postgres.go

@@ -0,0 +1,95 @@
+// Path: Backend/internal/database/postgres.go
+
+package database
+
+import (
+	"context"
+	"database/sql"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/jackc/pgx/v5/stdlib"
+	"github.com/pressly/goose/v3"
+
+	"moku-backend/db"
+)
+
+type DB struct {
+	Pool *pgxpool.Pool
+}
+
+func NewPostgres(databaseURL string) (*DB, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	config, err := pgxpool.ParseConfig(databaseURL)
+	if err != nil {
+		return nil, err
+	}
+
+	config.MaxConns = 25
+	config.MinConns = 5
+	config.MaxConnLifetime = time.Hour
+	config.MaxConnIdleTime = 30 * time.Minute
+
+	pool, err := pgxpool.NewWithConfig(ctx, config)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, err
+	}
+
+	return &DB{Pool: pool}, nil
+}
+
+func (d *DB) MigrateUp() error {
+	return d.runGoose(goose.Up)
+}
+
+func (d *DB) MigrateDown() error {
+	return d.runGoose(goose.Down)
+}
+
+func (d *DB) MigrateReset() error {
+	return d.runGoose(goose.Reset)
+}
+
+func (d *DB) MigrateStatus() error {
+	return d.runGoose(goose.Status)
+}
+
+func (d *DB) runGoose(command func(*sql.DB, string, ...goose.OptionsFunc) error) error {
+	if d == nil || d.Pool == nil {
+		return nil
+	}
+
+	sqlDB := stdlib.OpenDBFromPool(d.Pool)
+	defer sqlDB.Close()
+
+	goose.SetBaseFS(db.Migrations)
+
+	if err := goose.SetDialect("postgres"); err != nil {
+		return err
+	}
+
+	return command(sqlDB, "migrations")
+}
+
+func (d *DB) Health(ctx context.Context) error {
+	if d == nil || d.Pool == nil {
+		return nil
+	}
+
+	return d.Pool.Ping(ctx)
+}
+
+func (d *DB) Close() {
+	if d == nil || d.Pool == nil {
+		return
+	}
+
+	d.Pool.Close()
+}

Backend/internal/httpx/api_routes.go

@@ -0,0 +1,53 @@
+// Path: Backend/internal/httpx/api_routes.go
+
+package httpx
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+)
+
+type apiRoutes struct {
+	cfg RouterConfig
+}
+
+func newAPIRoutes(cfg RouterConfig) routeRegistrar {
+	return apiRoutes{cfg: cfg}
+}
+
+func (routes apiRoutes) Register(router chi.Router) {
+	router.Route("/v1", func(apiRouter chi.Router) {
+		apiRouter.Get("/", routes.handleIndex)
+		apiRouter.Get("/organizations", routes.handleOrganizations)
+		apiRouter.Get("/workspaces", routes.handleWorkspaces)
+	})
+}
+
+func (routes apiRoutes) handleIndex(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"service": routes.cfg.ServiceName,
+		"version": "v1",
+		"status":  "scaffolded",
+	})
+}
+
+func (routes apiRoutes) handleOrganizations(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": []any{},
+		"meta": map[string]any{
+			"resource": "organizations",
+			"count":    0,
+		},
+	})
+}
+
+func (routes apiRoutes) handleWorkspaces(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"data": []any{},
+		"meta": map[string]any{
+			"resource": "workspaces",
+			"count":    0,
+		},
+	})
+}

Backend/internal/httpx/middleware.go

@@ -0,0 +1,80 @@
+// Path: Backend/internal/httpx/middleware.go
+
+package httpx
+
+import (
+	"context"
+	"log/slog"
+	"net/http"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+type contextKey string
+
+const requestIDContextKey contextKey = "requestID"
+
+type statusRecorder struct {
+	http.ResponseWriter
+	statusCode int
+}
+
+func (r *statusRecorder) WriteHeader(statusCode int) {
+	r.statusCode = statusCode
+	r.ResponseWriter.WriteHeader(statusCode)
+}
+
+func RequestID(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requestID := uuid.NewString()
+		ctx := context.WithValue(r.Context(), requestIDContextKey, requestID)
+		w.Header().Set("X-Request-ID", requestID)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func Recoverer(logger *slog.Logger) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			defer func() {
+				if recovered := recover(); recovered != nil {
+					requestID := RequestIDFromContext(r.Context())
+					logger.Error("panic recovered", "request_id", requestID, "panic", recovered, "path", r.URL.Path)
+					WriteError(w, http.StatusInternalServerError, requestID, "internal_error", "An unexpected error occurred.")
+				}
+			}()
+
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+func RequestLogger(logger *slog.Logger) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			startedAt := time.Now()
+			recorder := &statusRecorder{ResponseWriter: w, statusCode: http.StatusOK}
+
+			next.ServeHTTP(recorder, r)
+
+			logger.Info(
+				"http request",
+				"request_id", RequestIDFromContext(r.Context()),
+				"method", r.Method,
+				"path", r.URL.Path,
+				"status", recorder.statusCode,
+				"duration", time.Since(startedAt).String(),
+			)
+		})
+	}
+}
+
+func RequestIDFromContext(ctx context.Context) string {
+	requestID, ok := ctx.Value(requestIDContextKey).(string)
+	if !ok {
+		return ""
+	}
+
+	return requestID
+}

Backend/internal/httpx/response.go

@@ -0,0 +1,33 @@
+// Path: Backend/internal/httpx/response.go
+
+package httpx
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+type ErrorResponse struct {
+	Error     string `json:"error"`
+	Message   string `json:"message"`
+	RequestID string `json:"requestId,omitempty"`
+}
+
+func WriteJSON(w http.ResponseWriter, status int, payload any) {
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+	w.WriteHeader(status)
+
+	if payload == nil {
+		return
+	}
+
+	_ = json.NewEncoder(w).Encode(payload)
+}
+
+func WriteError(w http.ResponseWriter, status int, requestID, code, message string) {
+	WriteJSON(w, status, ErrorResponse{
+		Error:     code,
+		Message:   message,
+		RequestID: requestID,
+	})
+}

Backend/internal/httpx/router.go

@@ -0,0 +1,70 @@
+// Path: Backend/internal/httpx/router.go
+
+package httpx
+
+import (
+	"log/slog"
+	"net/http"
+	"strings"
+
+	"github.com/go-chi/chi/v5"
+	chimiddleware "github.com/go-chi/chi/v5/middleware"
+
+	"moku-backend/internal/buildinfo"
+	"moku-backend/internal/cache"
+	"moku-backend/internal/config"
+	"moku-backend/internal/database"
+)
+
+type RouterConfig struct {
+	ServiceName string
+	Config      *config.Config
+	Logger      *slog.Logger
+	BuildInfo   buildinfo.Info
+	Database    *database.DB
+	Cache       *cache.Client
+}
+
+type routeRegistrar interface {
+	Register(chi.Router)
+}
+
+func NewRouter(cfg RouterConfig) http.Handler {
+	router := chi.NewRouter()
+
+	registerMiddleware(router, cfg)
+	registerRoutes(router, routesForService(cfg)...)
+	router.NotFound(notFoundHandler)
+
+	return router
+}
+
+func registerMiddleware(router chi.Router, cfg RouterConfig) {
+	router.Use(chimiddleware.RealIP)
+	router.Use(RequestID)
+	router.Use(Recoverer(cfg.Logger))
+	router.Use(RequestLogger(cfg.Logger))
+}
+
+func registerRoutes(router chi.Router, registrars ...routeRegistrar) {
+	for _, registrar := range registrars {
+		registrar.Register(router)
+	}
+}
+
+func routesForService(cfg RouterConfig) []routeRegistrar {
+	registrars := []routeRegistrar{newSharedRoutes(cfg)}
+
+	switch strings.ToLower(cfg.ServiceName) {
+	case "web":
+		registrars = append(registrars, newWebRoutes(cfg))
+	case "api":
+		registrars = append(registrars, newAPIRoutes(cfg))
+	}
+
+	return registrars
+}
+
+func notFoundHandler(w http.ResponseWriter, r *http.Request) {
+	WriteError(w, http.StatusNotFound, RequestIDFromContext(r.Context()), "not_found", "The requested endpoint does not exist.")
+}

Backend/internal/httpx/shared_routes.go

@@ -0,0 +1,69 @@
+// Path: Backend/internal/httpx/shared_routes.go
+
+package httpx
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+)
+
+type sharedRoutes struct {
+	cfg RouterConfig
+}
+
+func newSharedRoutes(cfg RouterConfig) routeRegistrar {
+	return sharedRoutes{cfg: cfg}
+}
+
+func (routes sharedRoutes) Register(router chi.Router) {
+	router.Get("/", routes.handleIndex)
+	router.Get("/health", routes.handleHealth)
+	router.Get("/version", routes.handleVersion)
+}
+
+func (routes sharedRoutes) handleIndex(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]string{
+		"service": routes.cfg.ServiceName,
+		"status":  "ok",
+	})
+}
+
+func (routes sharedRoutes) handleHealth(w http.ResponseWriter, r *http.Request) {
+	ctx, cancel := context.WithTimeout(r.Context(), 2*time.Second)
+	defer cancel()
+
+	databaseStatus := "ok"
+	if err := routes.cfg.Database.Health(ctx); err != nil {
+		databaseStatus = err.Error()
+	}
+
+	cacheStatus := "ok"
+	if err := routes.cfg.Cache.Health(ctx); err != nil {
+		cacheStatus = err.Error()
+	}
+
+	statusCode := http.StatusOK
+	if databaseStatus != "ok" || cacheStatus != "ok" {
+		statusCode = http.StatusServiceUnavailable
+	}
+
+	WriteJSON(w, statusCode, map[string]any{
+		"service": routes.cfg.ServiceName,
+		"status": map[string]string{
+			"database": databaseStatus,
+			"cache":    cacheStatus,
+		},
+	})
+}
+
+func (routes sharedRoutes) handleVersion(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"service":     routes.cfg.ServiceName,
+		"app":         routes.cfg.Config.AppName,
+		"environment": routes.cfg.Config.Environment,
+		"build":       routes.cfg.BuildInfo,
+	})
+}

Backend/internal/httpx/web_routes.go

@@ -0,0 +1,51 @@
+// Path: Backend/internal/httpx/web_routes.go
+
+package httpx
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+)
+
+type webRoutes struct {
+	cfg RouterConfig
+}
+
+func newWebRoutes(cfg RouterConfig) routeRegistrar {
+	return webRoutes{cfg: cfg}
+}
+
+func (routes webRoutes) Register(router chi.Router) {
+	router.Get("/session", routes.handleSession)
+	router.Get("/bootstrap", routes.handleBootstrap)
+	router.Get("/me", routes.handleCurrentUser)
+}
+
+func (routes webRoutes) handleSession(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"service": routes.cfg.ServiceName,
+		"session": map[string]any{
+			"authenticated": false,
+			"mode":          "cookie",
+		},
+	})
+}
+
+func (routes webRoutes) handleBootstrap(w http.ResponseWriter, _ *http.Request) {
+	WriteJSON(w, http.StatusOK, map[string]any{
+		"service": routes.cfg.ServiceName,
+		"app": map[string]any{
+			"name":        routes.cfg.Config.AppName,
+			"environment": routes.cfg.Config.Environment,
+		},
+		"features": map[string]bool{
+			"auth":       false,
+			"workspaces": false,
+		},
+	})
+}
+
+func (routes webRoutes) handleCurrentUser(w http.ResponseWriter, r *http.Request) {
+	WriteError(w, http.StatusNotImplemented, RequestIDFromContext(r.Context()), "not_implemented", "The current user endpoint is scaffolded but not implemented yet.")
+}

Backend/internal/process/process.go

@@ -0,0 +1,65 @@
+// Path: Backend/internal/process/process.go
+
+package process
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+func RunHTTPServer(serviceName, address string, handler http.Handler, logger *slog.Logger, shutdownTimeout time.Duration) error {
+	server := &http.Server{
+		Addr:              address,
+		Handler:           handler,
+		ReadHeaderTimeout: 5 * time.Second,
+	}
+
+	serverErr := make(chan error, 1)
+
+	go func() {
+		logger.Info("http server starting", "service", serviceName, "address", address)
+		serverErr <- server.ListenAndServe()
+	}()
+
+	signalCtx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	select {
+	case err := <-serverErr:
+		if err != nil && !errors.Is(err, http.ErrServerClosed) {
+			return err
+		}
+		return nil
+	case <-signalCtx.Done():
+		logger.Info("shutdown requested", "service", serviceName)
+	}
+
+	shutdownCtx, cancel := context.WithTimeout(context.Background(), shutdownTimeout)
+	defer cancel()
+
+	if err := server.Shutdown(shutdownCtx); err != nil {
+		return fmt.Errorf("shutdown %s server: %w", serviceName, err)
+	}
+
+	logger.Info("http server stopped", "service", serviceName)
+
+	return nil
+}
+
+func WaitForShutdown(serviceName string, logger *slog.Logger) error {
+	signalCtx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	logger.Info("process running", "service", serviceName)
+	<-signalCtx.Done()
+	logger.Info("shutdown requested", "service", serviceName)
+
+	return nil
+}

Backend/sqlc.yaml

@@ -0,0 +1,12 @@
+version: "2"
+sql:
+  - engine: "postgresql"
+    schema: "db/migrations"
+    queries: "db/queries"
+    gen:
+      go:
+        package: "sqlc"
+        out: "internal/sqlc"
+        sql_package: "pgx/v5"
+        emit_json_tags: true
+        emit_empty_slices: true

Commands/Local/Dev/backend.just

@@ -0,0 +1,26 @@
+project_root := justfile_directory()
+backend_dir := project_root + "/Backend"
+
+# Apply embedded database migrations.
+migrate-up:
+	cd '{{backend_dir}}' && go run ./cmd/migrate up
+
+# Roll back the most recent embedded database migration.
+migrate-down:
+	cd '{{backend_dir}}' && go run ./cmd/migrate down
+
+# Reset all embedded database migrations and reapply from scratch.
+migrate-reset:
+	cd '{{backend_dir}}' && go run ./cmd/migrate reset
+
+# Show the embedded database migration status.
+migrate-status:
+	cd '{{backend_dir}}' && go run ./cmd/migrate status
+
+# Format backend Go source files.
+fmt:
+	cd '{{backend_dir}}' && gofmt -w ./cmd ./db ./internal
+
+# Run backend test suite.
+test:
+	cd '{{backend_dir}}' && go test ./...

Commands/Local/Dev/frontend.just

@@ -0,0 +1,14 @@
+project_root := justfile_directory()
+local_compose := project_root + "/Docker/docker-compose.local.dev.yaml"
+frontend_dir := project_root + "/Frontend"
+node_modules_volume := "moku_work_frontend_node_modules"
+
+# Recreate the frontend node_modules Docker volume.
+node_modules:
+	docker compose -f '{{local_compose}}' rm -sf frontend >/dev/null 2>&1 || true
+	docker volume rm -f '{{node_modules_volume}}' >/dev/null 2>&1 || true
+	docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate frontend
+
+# Run the frontend TypeScript check.
+tsc:
+	cd '{{frontend_dir}}' && pnpm typecheck

Commands/Local/Dev/mod.just

@@ -0,0 +1,39 @@
+stack_runner := justfile_directory() + "/Commands/Local/Dev/scripts/dev-stack.sh"
+
+mod frontend
+mod backend
+
+# Build the combined local development stack assets.
+build:
+	bash '{{stack_runner}}' build
+
+# Start the full local development stack in the background.
+up:
+	bash '{{stack_runner}}' up
+
+# Build first, then start the full local development stack in the background.
+start:
+	bash '{{stack_runner}}' start
+
+# Alias for the main full local development flow.
+dev: up
+
+# Stop and remove the local development stack.
+down:
+	bash '{{stack_runner}}' down
+
+# Rebuild the full local development stack.
+rebuild:
+	bash '{{stack_runner}}' rebuild
+
+# Follow logs for the full local development stack.
+logs:
+	bash '{{stack_runner}}' logs
+
+# Restart the full local development stack.
+restart:
+	bash '{{stack_runner}}' restart
+
+# Stop the local development stack and remove local images, volumes, and backend dev state.
+clean:
+	bash '{{stack_runner}}' clean

Commands/Local/Dev/scripts/backend-stack.sh

@@ -0,0 +1,91 @@
+#!/usr/bin/env bash
+
+# Path: Commands/Local/Dev/scripts/backend-stack.sh
+set -euo pipefail
+
+action=${1:-up}
+
+script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
+project_root=$(cd -- "$script_dir/../../../.." && pwd)
+backend_dir="$project_root/Backend"
+backend_bake="$backend_dir/docker-bake.hcl"
+env_dir="$project_root/Env"
+compose_file="$project_root/Docker/docker-compose.local.dev.yaml"
+runtime_dir="$backend_dir/tmp/dev"
+backend_image="moku/work-backend:dev"
+backend_go_pkg_volume="moku_work_backend_go_pkg"
+backend_go_build_volume="moku_work_backend_go_build"
+
+services=(web api worker)
+
+source "$script_dir/docker.sh"
+source "$script_dir/env.sh"
+
+build_backend() {
+	cd "$backend_dir"
+	docker buildx bake -f "$backend_bake" dev
+}
+
+up_backend() {
+	docker compose -f "$compose_file" up -d --remove-orphans --force-recreate "${services[@]}"
+}
+
+down_backend() {
+	docker compose -f "$compose_file" stop "${services[@]}" >/dev/null 2>&1 || true
+	docker compose -f "$compose_file" rm -f "${services[@]}" >/dev/null 2>&1 || true
+}
+
+restart_backend() {
+	docker compose -f "$compose_file" restart "${services[@]}"
+}
+
+follow_logs() {
+	docker compose -f "$compose_file" logs -f "${services[@]}"
+}
+
+clean_runtime() {
+	rm -rf "$runtime_dir"
+}
+
+case "$action" in
+	check)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		;;
+	build)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		build_backend
+		;;
+	up)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		up_backend
+		;;
+	down)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		down_backend
+		;;
+	restart)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		restart_backend
+		;;
+	logs)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		follow_logs
+		;;
+	clean)
+		ensure_docker 'docker is required for the local backend dev runtime. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		down_backend
+		remove_docker_image_if_present "$backend_image"
+		remove_docker_volume_if_present "$backend_go_pkg_volume"
+		remove_docker_volume_if_present "$backend_go_build_volume"
+		clean_runtime
+		;;
+	*)
+		printf 'Unsupported backend stack action: %s\n' "$action" >&2
+		exit 1
+		;;
+esac

Commands/Local/Dev/scripts/dev-stack.sh

@@ -0,0 +1,102 @@
+#!/usr/bin/env bash
+
+# Path: Commands/Local/Dev/scripts/dev-stack.sh
+set -euo pipefail
+
+action=${1:-up}
+
+script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
+project_root=$(cd -- "$script_dir/../../../.." && pwd)
+frontend_dir="$project_root/Frontend"
+frontend_bake="$frontend_dir/docker-bake.hcl"
+backend_dir="$project_root/Backend"
+backend_bake="$backend_dir/docker-bake.hcl"
+env_dir="$project_root/Env"
+compose_file="$project_root/Docker/docker-compose.local.dev.yaml"
+frontend_image="moku/work-frontend:dev"
+backend_image="moku/work-backend:dev"
+frontend_volume="moku_work_frontend_node_modules"
+backend_go_pkg_volume="moku_work_backend_go_pkg"
+backend_go_build_volume="moku_work_backend_go_build"
+backend_runtime_dir="$backend_dir/tmp/dev"
+
+source "$script_dir/docker.sh"
+source "$script_dir/env.sh"
+
+build_frontend() {
+	cd "$frontend_dir"
+	docker buildx bake -f "$frontend_bake" dev
+}
+
+build_backend() {
+	cd "$backend_dir"
+	docker buildx bake -f "$backend_bake" dev
+}
+
+build_images() {
+	build_frontend
+	build_backend
+}
+
+up_stack() {
+	docker compose -f "$compose_file" up -d --remove-orphans --force-recreate
+}
+
+down_stack() {
+	docker compose -f "$compose_file" down --remove-orphans --volumes
+}
+
+follow_logs() {
+	docker compose -f "$compose_file" logs -f
+}
+
+clean_stack() {
+	docker compose -f "$compose_file" down --remove-orphans --volumes >/dev/null 2>&1 || true
+	remove_docker_image_if_present "$frontend_image"
+	remove_docker_image_if_present "$backend_image"
+	remove_docker_volume_if_present "$frontend_volume"
+	remove_docker_volume_if_present "$backend_go_pkg_volume"
+	remove_docker_volume_if_present "$backend_go_build_volume"
+	rm -rf "$backend_runtime_dir"
+}
+
+start_stack() {
+	build_images
+	up_stack
+}
+
+case "$action" in
+	build)
+		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		build_images
+		;;
+	up|start|rebuild)
+		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		start_stack
+		;;
+	down)
+		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		down_stack
+		;;
+	restart)
+		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		docker compose -f "$compose_file" restart
+		;;
+	logs)
+		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		follow_logs
+		;;
+	clean)
+		ensure_docker 'docker is required for the local development stack. Install Docker first.'
+		ensure_local_env_file "$env_dir"
+		clean_stack
+		;;
+	*)
+		printf 'Unsupported dev stack action: %s\n' "$action" >&2
+		exit 1
+		;;
+esac

Commands/Local/Dev/scripts/docker.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ensure_docker() {
+	local error_message=${1:-docker is required. Install Docker first.}
+
+	if ! command -v docker >/dev/null 2>&1; then
+		printf '%s\n' "$error_message" >&2
+		exit 1
+	fi
+}
+
+remove_docker_image_if_present() {
+	docker image rm -f "$1" >/dev/null 2>&1 || true
+}
+
+remove_docker_volume_if_present() {
+	docker volume rm -f "$1" >/dev/null 2>&1 || true
+}

Commands/Local/Dev/scripts/env.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ensure_local_env_file() {
+	local env_dir=$1
+	local example_env_file="$env_dir/.env.example"
+	local local_env_file="$env_dir/.env.local"
+
+	if [[ -f "$local_env_file" ]]; then
+		return
+	fi
+
+	if [[ ! -f "$example_env_file" ]]; then
+		printf 'Missing env template: %s\n' "$example_env_file" >&2
+		exit 1
+	fi
+
+	cp "$example_env_file" "$local_env_file"
+	printf 'Created %s from %s\n' "$local_env_file" "$example_env_file"
+}

Commands/Local/dev.just

@@ -1,36 +0,0 @@
-project_root := justfile_directory()
-frontend_dir := project_root + "/Frontend"
-frontend_bake := project_root + "/Frontend/docker-bake.hcl"
-local_compose := project_root + "/Docker/docker-compose.local.dev.yaml"
-
-# Build the Frontend development image.
-build:
-    cd '{{frontend_dir}}' && docker buildx bake -f '{{frontend_bake}}' dev
-
-# Start the local development stack in the background using the current image.
-up:
-    docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
-
-# Build first, then start the local development stack in the background.
-start: build
-    docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
-
-# Alias for the main local development flow.
-dev: start
-
-# Stop and remove the local development stack.
-down:
-    docker compose -f '{{local_compose}}' down --remove-orphans --volumes
-
-# Rebuild the Frontend development image and recreate the stack.
-rebuild:
-    cd '{{frontend_dir}}' && docker buildx bake -f '{{frontend_bake}}' dev
-    docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
-
-# Follow logs for the local development stack.
-logs:
-    docker compose -f '{{local_compose}}' logs -f
-
-# Restart the local development stack.
-restart:
-    docker compose -f '{{local_compose}}' restart

Commands/Local/mod.just

@@ -1,2 +1,2 @@
-mod dev
+mod dev "Dev"
 mod prod

Commands/Local/prod.just

@@ -1,32 +1,37 @@
 project_root := justfile_directory()
 proxy_bake := project_root + "/Proxy/docker-bake.hcl"
 local_compose := project_root + "/Docker/docker-compose.local.prod.yaml"
+proxy_image := "moku/work-proxy:local-prod"
 
 # Build the local production proxy image locally.
 build:
-    cd '{{project_root}}' && docker buildx bake -f '{{proxy_bake}}' prod
+	cd '{{project_root}}' && docker buildx bake -f '{{proxy_bake}}' prod
 
 # Start the local production stack in the background using the current image.
 up:
-    docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
+	docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
 
 # Build first, then start the local production stack in the background.
-start: build
-    docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
+start: build up
 
 # Rebuild the local production proxy image locally.
 rebuild:
-    cd '{{project_root}}' && docker buildx bake -f '{{proxy_bake}}' --set '*.no-cache=true' prod
-    docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
+	cd '{{project_root}}' && docker buildx bake -f '{{proxy_bake}}' --set '*.no-cache=true' prod
+	docker compose -f '{{local_compose}}' up -d --remove-orphans --force-recreate
 
 # Stop and remove the local production stack.
 down:
-    docker compose -f '{{local_compose}}' down --remove-orphans --volumes
+	docker compose -f '{{local_compose}}' down --remove-orphans --volumes
 
 # Follow logs for the local production stack.
 logs:
-    docker compose -f '{{local_compose}}' logs -f
+	docker compose -f '{{local_compose}}' logs -f
 
 # Restart the local production stack.
 restart:
-    docker compose -f '{{local_compose}}' restart
+	docker compose -f '{{local_compose}}' restart
+
+# Stop the local production stack and remove local images.
+clean:
+	docker compose -f '{{local_compose}}' down --remove-orphans --volumes
+	docker image rm -f '{{proxy_image}}' >/dev/null 2>&1 || true

Docker/docker-compose.local.dev.yaml

@@ -1,15 +1,95 @@
+x-backend-service: &backend-service
+  image: moku/work-backend:dev
+  restart: unless-stopped
+  env_file:
+    - ../Env/.env.local
+  environment:
+    DATABASE_URL: postgres://moku:moku_dev_password@postgres:5432/moku?sslmode=disable
+    VALKEY_URL: redis://valkey:6379/0
+  depends_on:
+    postgres:
+      condition: service_healthy
+    valkey:
+      condition: service_healthy
+  volumes:
+    - ../Backend:/app
+    - moku_work_backend_go_pkg:/go/pkg/mod
+    - moku_work_backend_go_build:/root/.cache/go-build
+
 services:
-    frontend:
-        image: moku/work-frontend:dev
-        container_name: moku-work-frontend
-        restart: unless-stopped
-        env_file:
-            - ../Env/.env.local
-        ports:
-            - "3333:3333"
-        volumes:
-            - ../Frontend:/app
-            - moku_work_frontend_node_modules:/app/node_modules
+  postgres:
+    image: postgres:17-alpine
+    container_name: moku-work-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: moku
+      POSTGRES_USER: moku
+      POSTGRES_PASSWORD: moku_dev_password
+    ports:
+      - "5432:5432"
+    volumes:
+      - moku_work_postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U moku -d moku"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+
+  valkey:
+    image: valkey/valkey:8-alpine
+    container_name: moku-work-valkey
+    restart: unless-stopped
+    ports:
+      - "6379:6379"
+    volumes:
+      - moku_work_valkey_data:/data
+    healthcheck:
+      test: ["CMD", "valkey-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 5s
+
+  frontend:
+    image: moku/work-frontend:dev
+    container_name: moku-work-frontend
+    restart: unless-stopped
+    env_file:
+      - ../Env/.env.local
+    depends_on:
+      postgres:
+        condition: service_healthy
+      valkey:
+        condition: service_healthy
+    ports:
+      - "3333:3333"
+    volumes:
+      - ../Frontend:/app
+      - moku_work_frontend_node_modules:/app/node_modules
+
+  web:
+    <<: *backend-service
+    container_name: moku-work-backend-web
+    command: ["air", "-c", ".air.web.toml"]
+    ports:
+      - "8080:8080"
+
+  api:
+    <<: *backend-service
+    container_name: moku-work-backend-api
+    command: ["air", "-c", ".air.api.toml"]
+    ports:
+      - "8081:8081"
+
+  worker:
+    <<: *backend-service
+    container_name: moku-work-backend-worker
+    command: ["air", "-c", ".air.worker.toml"]
 
 volumes:
-    moku_work_frontend_node_modules:
+  moku_work_postgres_data:
+  moku_work_valkey_data:
+  moku_work_frontend_node_modules:
+  moku_work_backend_go_pkg:
+  moku_work_backend_go_build:

Documentation/CONTRIBUTING

@@ -9,8 +9,8 @@ This project is still in an early scaffold stage, so the goal is to keep changes
 ### Project structure
 
 - `Frontend/` — SolidStart frontend workspace
-- `Backend/` — backend placeholder
-- `Proxy/` — proxy placeholder
+- `Backend/` — Go backend services (`web`, `api`, `worker`)
+- `Proxy/` — local production proxy/runtime assets
 - `Docker/` — local Docker Compose files
 - `Env/` — local environment files
 - `Commands/` — Just command modules and entrypoints
@@ -39,7 +39,8 @@ Main local development flow:
 just local dev
 ```
 
-This command builds the frontend development image and starts the local development stack.
+This command builds the frontend and backend development images, then starts the
+local development stack for Postgres, Valkey, frontend, and backend services.
 
 ### Local environment
 
@@ -49,7 +50,16 @@ Local development uses:
 Env/.env.local
 ```
 
-If local environment values are missing, create or update that file before starting the stack.
+The template lives at:
+
+```bash
+Env/.env.example
+```
+
+When you start the local Docker stack, the dev scripts will create `Env/.env.local`
+from `Env/.env.example` automatically if it does not already exist.
+
+If you need custom local values, edit `Env/.env.local` after it is created.
 
 ## Commit Naming Convention
 

Documentation/TODO.md

@@ -66,6 +66,14 @@
 - [ ] Table
 - [ ] CVA
 - [ ] Storyboard
+- [ ] Theme-System
+  - [ ] Theme-Registry
+  - [ ] Built-In-Theme-Presets
+  - [ ] Active-Theme-Persistence
+  - [ ] Theme-Switcher
+  - [ ] Theme-JSON-Upload
+  - [ ] Theme-JSON-Import-Validation
+  - [ ] Community-Theme-Readiness
 
 ### Version 0.3.0
 

Env/.env.example

@@ -0,0 +1,13 @@
+ALLOWED_HOSTS=
+
+APP_NAME=moku
+GO_ENV=development
+LOG_LEVEL=debug
+
+BACKEND_WEB_PORT=8080
+BACKEND_API_PORT=8081
+BACKEND_WORKER_PORT=8082
+BACKEND_SHUTDOWN_TIMEOUT=10s
+
+DATABASE_URL=postgres://moku:moku_dev_password@localhost:5432/moku?sslmode=disable
+VALKEY_URL=redis://localhost:6379/0

Frontend/public/themes/moku-default.json

@@ -0,0 +1,170 @@
+{
+	"schemaVersion": "1.0.0",
+	"id": "moku-default",
+	"name": "Moku Default",
+	"description": "Baseline Moku shell tokens for built-in light and dark modes.",
+	"tokens": {
+		"shared": {
+			"palette": {
+				"gray": {
+					"0": "hsl(210 20% 99%)",
+					"50": "hsl(220 20% 97%)",
+					"100": "hsl(220 16% 93%)",
+					"200": "hsl(220 13% 87%)",
+					"300": "hsl(220 11% 75%)",
+					"400": "hsl(220 9% 58%)",
+					"500": "hsl(220 10% 45%)",
+					"600": "hsl(220 14% 34%)",
+					"700": "hsl(220 18% 24%)",
+					"800": "hsl(220 22% 16%)",
+					"900": "hsl(220 28% 10%)"
+				},
+				"blue": {
+					"400": "hsl(218 88% 61%)",
+					"500": "hsl(221 83% 53%)",
+					"600": "hsl(224 76% 48%)"
+				},
+				"green": {
+					"500": "hsl(154 60% 40%)"
+				},
+				"red": {
+					"500": "hsl(0 72% 54%)"
+				},
+				"amber": {
+					"500": "hsl(36 100% 50%)"
+				}
+			},
+			"space": {
+				"1": "0.25rem",
+				"2": "0.5rem",
+				"3": "0.75rem",
+				"4": "1rem",
+				"5": "1.25rem",
+				"6": "1.5rem",
+				"8": "2rem",
+				"10": "2.5rem",
+				"12": "3rem"
+			},
+			"radius": {
+				"sm": "0.375rem",
+				"md": "0.625rem",
+				"lg": "0.875rem",
+				"xl": "1.25rem",
+				"pill": "999px"
+			},
+			"size": {
+				"controlMd": "2.25rem",
+				"controlLg": "2.5rem",
+				"contentWidthWide": "72rem",
+				"blurOverlay": "18px"
+			},
+			"shadow": {
+				"soft": "0 12px 32px hsl(220 30% 10% / 0.08)",
+				"strong": "0 20px 48px hsl(220 30% 10% / 0.16)"
+			},
+			"zIndex": {
+				"base": "1",
+				"dropdown": "100",
+				"sticky": "200",
+				"overlay": "400",
+				"modal": "500",
+				"toast": "600"
+			},
+			"motion": {
+				"durationFast": "140ms",
+				"durationBase": "220ms",
+				"durationSlow": "320ms",
+				"easeStandard": "cubic-bezier(0.2, 0.8, 0.2, 1)"
+			},
+			"typography": {
+				"fontFamily": {
+					"sans": "ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif",
+					"heading": "\"Avenir Next\", \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif",
+					"display": "\"Avenir Next\", \"Segoe UI\", \"Helvetica Neue\", Arial, sans-serif",
+					"serif": "ui-serif, Georgia, Cambria, \"Times New Roman\", Times, serif",
+					"mono": "ui-monospace, \"SF Mono\", \"SFMono-Regular\", Menlo, Monaco, Consolas, \"Liberation Mono\", \"Courier New\", monospace"
+				},
+				"fontSize": {
+					"caption": "0.75rem",
+					"label": "0.875rem",
+					"body": "1rem",
+					"title": "clamp(1.125rem, 1.05rem + 0.3vw, 1.25rem)",
+					"heading": "clamp(1.5rem, 1.2rem + 1vw, 2.125rem)",
+					"display": "clamp(2.25rem, 1.7rem + 2.2vw, 3.75rem)"
+				},
+				"lineHeight": {
+					"caption": "1.4",
+					"label": "1.35",
+					"body": "1.55",
+					"title": "1.3",
+					"heading": "1.15",
+					"display": "1.05"
+				},
+				"fontWeight": {
+					"caption": "500",
+					"label": "600",
+					"body": "400",
+					"title": "600",
+					"heading": "600",
+					"display": "700"
+				},
+				"letterSpacing": {
+					"caption": "0.01em",
+					"label": "0.005em",
+					"body": "0",
+					"title": "-0.01em",
+					"heading": "-0.02em",
+					"display": "-0.03em"
+				}
+			}
+		},
+		"modes": {
+			"light": {
+				"colorScheme": "light",
+				"colors": {
+					"canvas": "var(--gray-50)",
+					"surface": "hsl(0 0% 100% / 0.9)",
+					"surfaceMuted": "var(--gray-0)",
+					"surfaceHover": "var(--gray-100)",
+					"border": "hsl(220 15% 85% / 0.9)",
+					"borderStrong": "hsl(220 12% 70% / 0.9)",
+					"text": "var(--gray-800)",
+					"textMuted": "var(--gray-500)",
+					"accent": "var(--blue-500)",
+					"accentStrong": "var(--blue-600)",
+					"accentSoft": "hsl(218 88% 61% / 0.12)",
+					"accentContrast": "hsl(0 0% 100%)",
+					"success": "var(--green-500)",
+					"danger": "var(--red-500)",
+					"warning": "var(--amber-500)",
+					"focusRing": "hsl(221 83% 53% / 0.55)"
+				}
+			},
+			"dark": {
+				"colorScheme": "dark",
+				"colors": {
+					"canvas": "var(--gray-900)",
+					"surface": "hsl(220 23% 14% / 0.92)",
+					"surfaceMuted": "hsl(220 22% 12% / 0.96)",
+					"surfaceHover": "hsl(220 18% 20% / 0.96)",
+					"border": "hsl(220 12% 26% / 0.9)",
+					"borderStrong": "hsl(220 12% 38% / 0.9)",
+					"text": "hsl(210 20% 96%)",
+					"textMuted": "hsl(220 12% 70%)",
+					"accent": "hsl(217 91% 67%)",
+					"accentStrong": "hsl(218 88% 61%)",
+					"accentSoft": "hsl(217 91% 67% / 0.18)",
+					"accentContrast": "hsl(220 28% 10%)",
+					"success": "hsl(154 55% 48%)",
+					"danger": "hsl(0 72% 62%)",
+					"warning": "hsl(36 100% 60%)",
+					"focusRing": "hsl(217 91% 67% / 0.65)"
+				},
+				"shadow": {
+					"soft": "0 16px 40px hsl(220 40% 3% / 0.45)",
+					"strong": "0 24px 60px hsl(220 40% 3% / 0.55)"
+				}
+			}
+		}
+	}
+}

Frontend/src/components/shell/AppShell/AppShell.tsx

@@ -1,7 +1,7 @@
 // Path: Frontend/src/components/shell/AppShell/AppShell.tsx
 
 import { createSignal, onMount, type JSX } from "solid-js";
-import { getDocumentTheme, setTheme, type Theme } from "../../../helpers/theme";
+import { getDocumentTheme, setTheme, type Theme } from "../../../theme/runtime";
 import { WorkspaceHome } from "../../workspace-home/WorkspaceHome/WorkspaceHome";
 import { LeftRail } from "../LeftRail/LeftRail";
 import { ProfileDock } from "../ProfileDock/ProfileDock";

Frontend/src/components/shell/TopBar/TopBar.tsx

@@ -1,8 +1,8 @@
 // Path: Frontend/src/components/shell/TopBar/TopBar.tsx
 
 import { For, type JSX } from "solid-js";
-import type { Theme } from "../../../helpers/theme";
 import { ChevronDown } from "../../../lib/icons";
+import type { Theme } from "../../../theme/runtime";
 import { topBarActions } from "../data/shell.data";
 import styles from "./TopBar.module.scss";
 

Frontend/src/entry-client.tsx

@@ -1,8 +1,9 @@
 // Path: Frontend/src/entry-client.tsx
 
 // @refresh reload
-import type { JSX } from "solid-js";
 import { mount, StartClient } from "@solidjs/start/client";
+import type { JSX } from "solid-js";
+import { initializeThemeRuntime } from "./theme/runtime";
 
 const getAppRoot = (): HTMLElement => {
 	const appRoot = document.getElementById("app");
@@ -18,4 +19,6 @@ const mountApp = (): void => {
 	mount((): JSX.Element => <StartClient />, getAppRoot());
 };
 
+void initializeThemeRuntime();
+
 mountApp();

Frontend/src/entry-server.tsx

@@ -3,19 +3,21 @@
 // @refresh reload
 import type { JSX } from "solid-js";
 import { createHandler, StartServer } from "@solidjs/start/server";
+import { DEFAULT_THEME, THEME_STORAGE_KEY } from "./theme/runtime";
+import { THEME_MODE_NAMES } from "./theme/schema";
 
 const themeBootstrapScript = `
 (() => {
   try {
-    const storageKey = "theme";
+    const storageKey = ${JSON.stringify(THEME_STORAGE_KEY)};
     const stored = localStorage.getItem(storageKey);
-    const theme = stored === "light" || stored === "dark"
+    const theme = stored === ${JSON.stringify(THEME_MODE_NAMES[0])} || stored === ${JSON.stringify(THEME_MODE_NAMES[1])}
       ? stored
-      : (window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light");
+      : (window.matchMedia("(prefers-color-scheme: dark)").matches ? ${JSON.stringify(THEME_MODE_NAMES[1])} : ${JSON.stringify(DEFAULT_THEME)});
 
     document.documentElement.setAttribute("data-theme", theme);
   } catch {
-    document.documentElement.setAttribute("data-theme", "light");
+    document.documentElement.setAttribute("data-theme", ${JSON.stringify(DEFAULT_THEME)});
   }
 })();
 `;
@@ -28,7 +30,7 @@ type DocumentRenderProps = {
 
 const renderDocument = ({ assets, children, scripts }: DocumentRenderProps): JSX.Element => {
 	return (
-		<html lang="en" data-theme="light">
+		<html lang="en" data-theme={DEFAULT_THEME}>
 			<head>
 				<meta charset="utf-8" />
 				<meta name="viewport" content="width=device-width, initial-scale=1" />

Frontend/src/helpers/theme.ts

@@ -1,22 +0,0 @@
-// Path: Frontend/src/helpers/theme.ts
-
-export type Theme = "light" | "dark";
-
-export const THEME_STORAGE_KEY = "theme";
-
-export const resolvePreferredTheme = (): Theme => {
-	const stored = localStorage.getItem(THEME_STORAGE_KEY);
-
-	if (stored === "light" || stored === "dark") {
-		return stored;
-	}
-
-	return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
-};
-
-export const getDocumentTheme = (): Theme => (document.documentElement.getAttribute("data-theme") === "dark" ? "dark" : "light");
-
-export const setTheme = (theme: Theme): void => {
-	document.documentElement.setAttribute("data-theme", theme);
-	localStorage.setItem(THEME_STORAGE_KEY, theme);
-};

Frontend/src/theme/presets.ts

@@ -0,0 +1,11 @@
+// Path: Frontend/src/theme/presets.ts
+
+import type { ThemeDefinition } from "./schema";
+
+export const defaultThemePresetPath = "/themes/moku-default.json";
+
+export const defaultThemePresetMeta = {
+	id: "moku-default",
+	name: "Moku Default",
+	description: "The baseline Moku theme preset, matching the current shell styling tokens.",
+} satisfies Pick<ThemeDefinition, "id" | "name" | "description">;

Frontend/src/theme/runtime.ts

@@ -0,0 +1,129 @@
+// Path: Frontend/src/theme/runtime.ts
+
+import { defaultThemePresetPath } from "./presets";
+import { createCssVariableMap, isThemeModeName, validateThemeDefinition, type ThemeDefinition, type ThemeModeName } from "./schema";
+
+export type Theme = ThemeModeName;
+
+export const THEME_STORAGE_KEY = "theme";
+export const DEFAULT_THEME: Theme = "light";
+
+let activeThemeDefinition: ThemeDefinition | null = null;
+let themeInitializationPromise: Promise<ThemeDefinition | null> | null = null;
+
+const canUseDom = (): boolean => typeof document !== "undefined";
+
+const canUseStorage = (): boolean => typeof localStorage !== "undefined";
+
+const canUseMatchMedia = (): boolean => typeof window !== "undefined" && typeof window.matchMedia === "function";
+
+const getRootElement = (): HTMLElement | null => {
+	return canUseDom() ? document.documentElement : null;
+};
+
+const setDocumentThemeMode = (theme: Theme): void => {
+	const rootElement = getRootElement();
+
+	rootElement?.setAttribute("data-theme", theme);
+
+	if (rootElement) {
+		rootElement.style.colorScheme = theme;
+	}
+
+	if (canUseStorage()) {
+		localStorage.setItem(THEME_STORAGE_KEY, theme);
+	}
+};
+
+const applyThemeVariables = (themeDefinition: ThemeDefinition, theme: Theme): void => {
+	const rootElement = getRootElement();
+
+	if (!rootElement) {
+		return;
+	}
+
+	const variableMap = createCssVariableMap(themeDefinition, theme);
+
+	for (const [name, value] of Object.entries(variableMap)) {
+		rootElement.style.setProperty(name, value);
+	}
+};
+
+export const resolvePreferredTheme = (): Theme => {
+	const stored = canUseStorage() ? localStorage.getItem(THEME_STORAGE_KEY) : null;
+
+	if (isThemeModeName(stored)) {
+		return stored;
+	}
+
+	if (canUseMatchMedia()) {
+		return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : DEFAULT_THEME;
+	}
+
+	return DEFAULT_THEME;
+};
+
+export const getDocumentTheme = (): Theme => {
+	const theme = getRootElement()?.getAttribute("data-theme");
+
+	return isThemeModeName(theme) ? theme : resolvePreferredTheme();
+};
+
+export const applyThemeDefinition = (themeDefinition: ThemeDefinition, theme: Theme): void => {
+	activeThemeDefinition = themeDefinition;
+	setDocumentThemeMode(theme);
+	applyThemeVariables(themeDefinition, theme);
+};
+
+export const initializeThemeRuntime = async (): Promise<ThemeDefinition | null> => {
+	if (typeof window === "undefined") {
+		return null;
+	}
+
+	if (activeThemeDefinition) {
+		applyThemeDefinition(activeThemeDefinition, getDocumentTheme());
+		return activeThemeDefinition;
+	}
+
+	if (!themeInitializationPromise) {
+		themeInitializationPromise = (async (): Promise<ThemeDefinition | null> => {
+			try {
+				const response = await fetch(defaultThemePresetPath, {
+					headers: {
+						Accept: "application/json",
+					},
+				});
+
+				if (!response.ok) {
+					throw new Error(`Theme preset request failed with status ${response.status}.`);
+				}
+
+				const candidate = (await response.json()) as unknown;
+				const result = validateThemeDefinition(candidate);
+
+				if (!result.success) {
+					throw new Error(result.errors.join(" "));
+				}
+
+				applyThemeDefinition(result.data, getDocumentTheme());
+
+				return result.data;
+			} catch (error) {
+				console.error("Failed to initialize theme runtime.", error);
+				return null;
+			} finally {
+				themeInitializationPromise = null;
+			}
+		})();
+	}
+
+	return themeInitializationPromise;
+};
+
+export const setTheme = (theme: Theme): void => {
+	setDocumentThemeMode(theme);
+
+	if (activeThemeDefinition) {
+		applyThemeVariables(activeThemeDefinition, theme);
+	}
+};

Frontend/src/theme/schema.ts

@@ -0,0 +1,342 @@
+// Path: Frontend/src/theme/schema.ts
+
+export const THEME_SCHEMA_VERSION = "1.0.0";
+export const THEME_MODE_NAMES = ["light", "dark"] as const;
+export const THEME_PALETTE_KEYS = {
+	gray: ["0", "50", "100", "200", "300", "400", "500", "600", "700", "800", "900"],
+	blue: ["400", "500", "600"],
+	green: ["500"],
+	red: ["500"],
+	amber: ["500"],
+} as const;
+export const THEME_SPACE_KEYS = ["1", "2", "3", "4", "5", "6", "8", "10", "12"] as const;
+export const THEME_RADIUS_KEYS = ["sm", "md", "lg", "xl", "pill"] as const;
+export const THEME_SIZE_KEYS = ["controlMd", "controlLg", "contentWidthWide", "blurOverlay"] as const;
+export const THEME_SHADOW_KEYS = ["soft", "strong"] as const;
+export const THEME_Z_INDEX_KEYS = ["base", "dropdown", "sticky", "overlay", "modal", "toast"] as const;
+export const THEME_MOTION_KEYS = ["durationFast", "durationBase", "durationSlow", "easeStandard"] as const;
+export const THEME_TYPE_SCALE_KEYS = ["caption", "label", "body", "title", "heading", "display"] as const;
+export const THEME_FONT_FAMILY_KEYS = ["sans", "heading", "display", "serif", "mono"] as const;
+export const THEME_MODE_COLOR_KEYS = ["canvas", "surface", "surfaceMuted", "surfaceHover", "border", "borderStrong", "text", "textMuted", "accent", "accentStrong", "accentSoft", "accentContrast", "success", "danger", "warning", "focusRing"] as const;
+
+export type ThemeModeName = (typeof THEME_MODE_NAMES)[number];
+
+type ThemeTokenMap<TKey extends string> = Record<TKey, string>;
+
+export type ThemeSharedTokens = {
+	palette: {
+		gray: ThemeTokenMap<(typeof THEME_PALETTE_KEYS.gray)[number]>;
+		blue: ThemeTokenMap<(typeof THEME_PALETTE_KEYS.blue)[number]>;
+		green: ThemeTokenMap<(typeof THEME_PALETTE_KEYS.green)[number]>;
+		red: ThemeTokenMap<(typeof THEME_PALETTE_KEYS.red)[number]>;
+		amber: ThemeTokenMap<(typeof THEME_PALETTE_KEYS.amber)[number]>;
+	};
+	space: ThemeTokenMap<(typeof THEME_SPACE_KEYS)[number]>;
+	radius: ThemeTokenMap<(typeof THEME_RADIUS_KEYS)[number]>;
+	size: ThemeTokenMap<(typeof THEME_SIZE_KEYS)[number]>;
+	shadow: ThemeTokenMap<(typeof THEME_SHADOW_KEYS)[number]>;
+	zIndex: ThemeTokenMap<(typeof THEME_Z_INDEX_KEYS)[number]>;
+	motion: ThemeTokenMap<(typeof THEME_MOTION_KEYS)[number]>;
+	typography: {
+		fontFamily: ThemeTokenMap<(typeof THEME_FONT_FAMILY_KEYS)[number]>;
+		fontSize: ThemeTokenMap<(typeof THEME_TYPE_SCALE_KEYS)[number]>;
+		lineHeight: ThemeTokenMap<(typeof THEME_TYPE_SCALE_KEYS)[number]>;
+		fontWeight: ThemeTokenMap<(typeof THEME_TYPE_SCALE_KEYS)[number]>;
+		letterSpacing: ThemeTokenMap<(typeof THEME_TYPE_SCALE_KEYS)[number]>;
+	};
+};
+
+export type ThemeModeTokens = {
+	colorScheme: ThemeModeName;
+	colors: ThemeTokenMap<(typeof THEME_MODE_COLOR_KEYS)[number]>;
+	shadow?: Partial<ThemeTokenMap<(typeof THEME_SHADOW_KEYS)[number]>>;
+};
+
+export type ThemeDefinition = {
+	schemaVersion: typeof THEME_SCHEMA_VERSION;
+	id: string;
+	name: string;
+	description?: string;
+	author?: string;
+	tokens: {
+		shared: ThemeSharedTokens;
+		modes: Record<ThemeModeName, ThemeModeTokens>;
+	};
+};
+
+export type ThemeValidationResult =
+	| {
+			success: true;
+			data: ThemeDefinition;
+	  }
+	| {
+			success: false;
+			errors: string[];
+	  };
+
+const isRecord = (value: unknown): value is Record<string, unknown> => typeof value === "object" && value !== null && !Array.isArray(value);
+
+const isNonEmptyString = (value: unknown): value is string => typeof value === "string" && value.trim().length > 0;
+
+const getNestedRecord = (value: unknown, path: string, errors: string[]): Record<string, unknown> | null => {
+	if (!isRecord(value)) {
+		errors.push(`${path} must be an object.`);
+		return null;
+	}
+
+	return value;
+};
+
+const validateRequiredStringMap = (record: Record<string, unknown>, path: string, requiredKeys: readonly string[], errors: string[]): void => {
+	for (const key of requiredKeys) {
+		if (!isNonEmptyString(record[key])) {
+			errors.push(`${path}.${key} must be a non-empty string token value.`);
+		}
+	}
+};
+
+export const isThemeModeName = (value: unknown): value is ThemeModeName => typeof value === "string" && THEME_MODE_NAMES.includes(value as ThemeModeName);
+
+export const validateThemeDefinition = (candidate: unknown): ThemeValidationResult => {
+	const errors: string[] = [];
+	const root = getNestedRecord(candidate, "theme", errors);
+
+	if (!root) {
+		return { success: false, errors };
+	}
+
+	if (root.schemaVersion !== THEME_SCHEMA_VERSION) {
+		errors.push(`theme.schemaVersion must be ${THEME_SCHEMA_VERSION}.`);
+	}
+
+	if (!isNonEmptyString(root.id)) {
+		errors.push("theme.id must be a non-empty string.");
+	}
+
+	if (!isNonEmptyString(root.name)) {
+		errors.push("theme.name must be a non-empty string.");
+	}
+
+	if (root.description !== undefined && !isNonEmptyString(root.description)) {
+		errors.push("theme.description must be a non-empty string when provided.");
+	}
+
+	if (root.author !== undefined && !isNonEmptyString(root.author)) {
+		errors.push("theme.author must be a non-empty string when provided.");
+	}
+
+	const tokens = getNestedRecord(root.tokens, "theme.tokens", errors);
+	const shared = tokens ? getNestedRecord(tokens.shared, "theme.tokens.shared", errors) : null;
+	const modes = tokens ? getNestedRecord(tokens.modes, "theme.tokens.modes", errors) : null;
+
+	if (shared) {
+		const palette = getNestedRecord(shared.palette, "theme.tokens.shared.palette", errors);
+		const space = getNestedRecord(shared.space, "theme.tokens.shared.space", errors);
+		const radius = getNestedRecord(shared.radius, "theme.tokens.shared.radius", errors);
+		const size = getNestedRecord(shared.size, "theme.tokens.shared.size", errors);
+		const shadow = getNestedRecord(shared.shadow, "theme.tokens.shared.shadow", errors);
+		const zIndex = getNestedRecord(shared.zIndex, "theme.tokens.shared.zIndex", errors);
+		const motion = getNestedRecord(shared.motion, "theme.tokens.shared.motion", errors);
+		const typography = getNestedRecord(shared.typography, "theme.tokens.shared.typography", errors);
+
+		if (palette) {
+			for (const [paletteName, keys] of Object.entries(THEME_PALETTE_KEYS)) {
+				const paletteScale = getNestedRecord(palette[paletteName], `theme.tokens.shared.palette.${paletteName}`, errors);
+
+				if (paletteScale) {
+					validateRequiredStringMap(paletteScale, `theme.tokens.shared.palette.${paletteName}`, keys, errors);
+				}
+			}
+		}
+
+		if (space) {
+			validateRequiredStringMap(space, "theme.tokens.shared.space", THEME_SPACE_KEYS, errors);
+		}
+
+		if (radius) {
+			validateRequiredStringMap(radius, "theme.tokens.shared.radius", THEME_RADIUS_KEYS, errors);
+		}
+
+		if (size) {
+			validateRequiredStringMap(size, "theme.tokens.shared.size", THEME_SIZE_KEYS, errors);
+		}
+
+		if (shadow) {
+			validateRequiredStringMap(shadow, "theme.tokens.shared.shadow", THEME_SHADOW_KEYS, errors);
+		}
+
+		if (zIndex) {
+			validateRequiredStringMap(zIndex, "theme.tokens.shared.zIndex", THEME_Z_INDEX_KEYS, errors);
+		}
+
+		if (motion) {
+			validateRequiredStringMap(motion, "theme.tokens.shared.motion", THEME_MOTION_KEYS, errors);
+		}
+
+		if (typography) {
+			const fontFamily = getNestedRecord(typography.fontFamily, "theme.tokens.shared.typography.fontFamily", errors);
+			const fontSize = getNestedRecord(typography.fontSize, "theme.tokens.shared.typography.fontSize", errors);
+			const lineHeight = getNestedRecord(typography.lineHeight, "theme.tokens.shared.typography.lineHeight", errors);
+			const fontWeight = getNestedRecord(typography.fontWeight, "theme.tokens.shared.typography.fontWeight", errors);
+			const letterSpacing = getNestedRecord(typography.letterSpacing, "theme.tokens.shared.typography.letterSpacing", errors);
+
+			if (fontFamily) {
+				validateRequiredStringMap(fontFamily, "theme.tokens.shared.typography.fontFamily", THEME_FONT_FAMILY_KEYS, errors);
+			}
+
+			if (fontSize) {
+				validateRequiredStringMap(fontSize, "theme.tokens.shared.typography.fontSize", THEME_TYPE_SCALE_KEYS, errors);
+			}
+
+			if (lineHeight) {
+				validateRequiredStringMap(lineHeight, "theme.tokens.shared.typography.lineHeight", THEME_TYPE_SCALE_KEYS, errors);
+			}
+
+			if (fontWeight) {
+				validateRequiredStringMap(fontWeight, "theme.tokens.shared.typography.fontWeight", THEME_TYPE_SCALE_KEYS, errors);
+			}
+
+			if (letterSpacing) {
+				validateRequiredStringMap(letterSpacing, "theme.tokens.shared.typography.letterSpacing", THEME_TYPE_SCALE_KEYS, errors);
+			}
+		}
+	}
+
+	if (modes) {
+		for (const modeName of THEME_MODE_NAMES) {
+			const mode = getNestedRecord(modes[modeName], `theme.tokens.modes.${modeName}`, errors);
+
+			if (!mode) {
+				continue;
+			}
+
+			if (mode.colorScheme !== modeName) {
+				errors.push(`theme.tokens.modes.${modeName}.colorScheme must be ${modeName}.`);
+			}
+
+			const colors = getNestedRecord(mode.colors, `theme.tokens.modes.${modeName}.colors`, errors);
+
+			if (colors) {
+				validateRequiredStringMap(colors, `theme.tokens.modes.${modeName}.colors`, THEME_MODE_COLOR_KEYS, errors);
+			}
+
+			if (mode.shadow !== undefined) {
+				const modeShadow = getNestedRecord(mode.shadow, `theme.tokens.modes.${modeName}.shadow`, errors);
+
+				if (modeShadow) {
+					for (const key of THEME_SHADOW_KEYS) {
+						if (modeShadow[key] !== undefined && !isNonEmptyString(modeShadow[key])) {
+							errors.push(`theme.tokens.modes.${modeName}.shadow.${key} must be a non-empty string token value when provided.`);
+						}
+					}
+				}
+			}
+		}
+	}
+
+	if (errors.length > 0) {
+		return { success: false, errors };
+	}
+
+	return { success: true, data: candidate as ThemeDefinition };
+};
+
+export const createCssVariableMap = (theme: ThemeDefinition, mode: ThemeModeName): Record<string, string> => {
+	const shared = theme.tokens.shared;
+	const modeTokens = theme.tokens.modes[mode];
+
+	return {
+		"--gray-0": shared.palette.gray["0"],
+		"--gray-50": shared.palette.gray["50"],
+		"--gray-100": shared.palette.gray["100"],
+		"--gray-200": shared.palette.gray["200"],
+		"--gray-300": shared.palette.gray["300"],
+		"--gray-400": shared.palette.gray["400"],
+		"--gray-500": shared.palette.gray["500"],
+		"--gray-600": shared.palette.gray["600"],
+		"--gray-700": shared.palette.gray["700"],
+		"--gray-800": shared.palette.gray["800"],
+		"--gray-900": shared.palette.gray["900"],
+		"--blue-400": shared.palette.blue["400"],
+		"--blue-500": shared.palette.blue["500"],
+		"--blue-600": shared.palette.blue["600"],
+		"--green-500": shared.palette.green["500"],
+		"--red-500": shared.palette.red["500"],
+		"--amber-500": shared.palette.amber["500"],
+		"--space-1": shared.space["1"],
+		"--space-2": shared.space["2"],
+		"--space-3": shared.space["3"],
+		"--space-4": shared.space["4"],
+		"--space-5": shared.space["5"],
+		"--space-6": shared.space["6"],
+		"--space-8": shared.space["8"],
+		"--space-10": shared.space["10"],
+		"--space-12": shared.space["12"],
+		"--radius-sm": shared.radius.sm,
+		"--radius-md": shared.radius.md,
+		"--radius-lg": shared.radius.lg,
+		"--radius-xl": shared.radius.xl,
+		"--radius-pill": shared.radius.pill,
+		"--control-size-md": shared.size.controlMd,
+		"--control-size-lg": shared.size.controlLg,
+		"--content-width-wide": shared.size.contentWidthWide,
+		"--blur-overlay": shared.size.blurOverlay,
+		"--shadow-soft": modeTokens.shadow?.soft ?? shared.shadow.soft,
+		"--shadow-strong": modeTokens.shadow?.strong ?? shared.shadow.strong,
+		"--z-base": shared.zIndex.base,
+		"--z-dropdown": shared.zIndex.dropdown,
+		"--z-sticky": shared.zIndex.sticky,
+		"--z-overlay": shared.zIndex.overlay,
+		"--z-modal": shared.zIndex.modal,
+		"--z-toast": shared.zIndex.toast,
+		"--motion-duration-fast": shared.motion.durationFast,
+		"--motion-duration-base": shared.motion.durationBase,
+		"--motion-duration-slow": shared.motion.durationSlow,
+		"--motion-ease-standard": shared.motion.easeStandard,
+		"--font-family-sans": shared.typography.fontFamily.sans,
+		"--font-family-heading": shared.typography.fontFamily.heading,
+		"--font-family-display": shared.typography.fontFamily.display,
+		"--font-family-serif": shared.typography.fontFamily.serif,
+		"--font-family-mono": shared.typography.fontFamily.mono,
+		"--font-size-caption": shared.typography.fontSize.caption,
+		"--font-size-label": shared.typography.fontSize.label,
+		"--font-size-body": shared.typography.fontSize.body,
+		"--font-size-title": shared.typography.fontSize.title,
+		"--font-size-heading": shared.typography.fontSize.heading,
+		"--font-size-display": shared.typography.fontSize.display,
+		"--line-height-caption": shared.typography.lineHeight.caption,
+		"--line-height-label": shared.typography.lineHeight.label,
+		"--line-height-body": shared.typography.lineHeight.body,
+		"--line-height-title": shared.typography.lineHeight.title,
+		"--line-height-heading": shared.typography.lineHeight.heading,
+		"--line-height-display": shared.typography.lineHeight.display,
+		"--font-weight-caption": shared.typography.fontWeight.caption,
+		"--font-weight-label": shared.typography.fontWeight.label,
+		"--font-weight-body": shared.typography.fontWeight.body,
+		"--font-weight-title": shared.typography.fontWeight.title,
+		"--font-weight-heading": shared.typography.fontWeight.heading,
+		"--font-weight-display": shared.typography.fontWeight.display,
+		"--letter-spacing-caption": shared.typography.letterSpacing.caption,
+		"--letter-spacing-label": shared.typography.letterSpacing.label,
+		"--letter-spacing-body": shared.typography.letterSpacing.body,
+		"--letter-spacing-title": shared.typography.letterSpacing.title,
+		"--letter-spacing-heading": shared.typography.letterSpacing.heading,
+		"--letter-spacing-display": shared.typography.letterSpacing.display,
+		"--color-canvas": modeTokens.colors.canvas,
+		"--color-surface": modeTokens.colors.surface,
+		"--color-surface-muted": modeTokens.colors.surfaceMuted,
+		"--color-surface-hover": modeTokens.colors.surfaceHover,
+		"--color-border": modeTokens.colors.border,
+		"--color-border-strong": modeTokens.colors.borderStrong,
+		"--color-text": modeTokens.colors.text,
+		"--color-text-muted": modeTokens.colors.textMuted,
+		"--color-accent": modeTokens.colors.accent,
+		"--color-accent-strong": modeTokens.colors.accentStrong,
+		"--color-accent-soft": modeTokens.colors.accentSoft,
+		"--color-accent-contrast": modeTokens.colors.accentContrast,
+		"--color-success": modeTokens.colors.success,
+		"--color-danger": modeTokens.colors.danger,
+		"--color-warning": modeTokens.colors.warning,
+		"--color-focus-ring": modeTokens.colors.focusRing,
+	};
+};

Justfile

@@ -4,4 +4,4 @@ mod local "Commands/Local"
 
 [default]
 help:
-    just --list --list-submodules
+	just --list --list-submodules