Add Mage build system

Set up magefiles/ directory with targets for test, coverage,
lint, and build commands. Uses github.com/magefile/mage v1.15.0.

.beads/issues.jsonl

@@ -19,7 +19,7 @@
 {"id":"kanboard-api-ob2","title":"Add MIT license","description":"Add MIT license file to the repository.\n\n## Files to create\n- LICENSE\n\n## Content\nStandard MIT license text with appropriate copyright holder.\n\n## Acceptance criteria\n- Valid MIT license\n- Proper copyright attribution","status":"open","priority":3,"issue_type":"chore","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:36:53.955909551+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T17:36:53.955909551+01:00"}
 {"id":"kanboard-api-s7k","title":"Implement error types and handling","description":"Implement comprehensive error types for the Kanboard API client.\n\n## Sentinel Errors\n- ErrConnectionFailed, ErrTimeout (network)\n- ErrUnauthorized, ErrForbidden (auth)\n- ErrNotFound, ErrProjectNotFound, ErrTaskNotFound, ErrColumnNotFound, ErrCommentNotFound (resources)\n- ErrAlreadyInLastColumn, ErrAlreadyInFirstColumn, ErrTaskClosed, ErrTaskOpen (logic)\n- ErrEmptyTitle, ErrInvalidProjectID (validation)\n- ErrAPIError (API)\n\n## APIError struct\n- Code int\n- Message string\n- Error() string method\n\n## Helper functions\n- IsNotFound(err error) bool\n- IsUnauthorized(err error) bool\n- IsAPIError(err error) bool\n\n## Files to create\n- errors.go\n\n## Acceptance criteria\n- All errors properly support errors.Is/errors.As\n- Error wrapping with %w for context preservation","status":"closed","priority":0,"issue_type":"feature","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:34:54.484116412+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T18:13:03.195687148+01:00","closed_at":"2026-01-15T18:13:03.195687148+01:00","close_reason":"Closed"}
 {"id":"kanboard-api-t36","title":"Implement MoveToNextColumn with column logic","description":"Implement TaskScope.MoveToNextColumn with automatic column position logic.\n\n## Method to implement\n- TaskScope.MoveToNextColumn(ctx) error\n\n## Workflow\n1. Get task via getTask\n2. Get columns for task's project via getColumns\n3. Sort columns by position\n4. Find current column position\n5. If last column: return ErrAlreadyInLastColumn\n6. Move to next column via moveTaskPosition\n\n## Files to modify\n- task_scope.go\n\n## Acceptance criteria\n- Correctly identifies next column by position\n- Returns ErrAlreadyInLastColumn for last column\n- Handles column gaps (positions 1, 3, 5 etc.)","status":"closed","priority":1,"issue_type":"feature","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:36:29.900647957+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T18:41:56.137534164+01:00","closed_at":"2026-01-15T18:41:56.137534164+01:00","close_reason":"Closed","dependencies":[{"issue_id":"kanboard-api-t36","depends_on_id":"kanboard-api-una","type":"blocks","created_at":"2026-01-15T17:45:32.256714732+01:00","created_by":"Oliver Jakoubek"},{"issue_id":"kanboard-api-t36","depends_on_id":"kanboard-api-l9b","type":"blocks","created_at":"2026-01-15T17:45:32.319227723+01:00","created_by":"Oliver Jakoubek"}]}
-{"id":"kanboard-api-ukc","title":"Set up Mage build system","description":"Set up Mage build system for development automation.\n\n## Directory structure\n```\nmagefiles/\n├── go.mod\n├── go.sum\n└── magefile.go\n```\n\n## Targets to implement\n- Test() - Run all tests with race detection and coverage\n- Coverage() - Run tests and open HTML coverage report\n- Lint() - Run golangci-lint\n- Build() - Verify module compiles\n\n## Files to create\n- magefiles/go.mod\n- magefiles/magefile.go\n\n## Acceptance criteria\n- `mage test` runs tests with -race and -coverprofile\n- `mage lint` runs golangci-lint\n- `mage build` verifies compilation","status":"open","priority":2,"issue_type":"chore","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:36:30.260235504+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T17:36:30.260235504+01:00"}
+{"id":"kanboard-api-ukc","title":"Set up Mage build system","description":"Set up Mage build system for development automation.\n\n## Directory structure\n```\nmagefiles/\n├── go.mod\n├── go.sum\n└── magefile.go\n```\n\n## Targets to implement\n- Test() - Run all tests with race detection and coverage\n- Coverage() - Run tests and open HTML coverage report\n- Lint() - Run golangci-lint\n- Build() - Verify module compiles\n\n## Files to create\n- magefiles/go.mod\n- magefiles/magefile.go\n\n## Acceptance criteria\n- `mage test` runs tests with -race and -coverprofile\n- `mage lint` runs golangci-lint\n- `mage build` verifies compilation","status":"in_progress","priority":2,"issue_type":"chore","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:36:30.260235504+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T19:14:39.525927006+01:00"}
 {"id":"kanboard-api-uls","title":"Implement Client struct with fluent configuration","description":"Implement the main Client struct with fluent builder pattern for configuration.\n\n## Requirements\n- Client struct with baseURL, httpClient, auth, logger, requestID\n- NewClient(baseURL string) constructor\n- Fluent configuration methods:\n  - WithAPIToken(token string) *Client\n  - WithBasicAuth(username, password string) *Client\n  - WithHTTPClient(client *http.Client) *Client\n  - WithTimeout(timeout time.Duration) *Client\n  - WithLogger(logger *slog.Logger) *Client\n- Default timeout of 30 seconds\n- Thread-safe for concurrent use\n\n## Files to create\n- client.go\n\n## Acceptance criteria\n- Client is immutable after configuration\n- Thread-safe concurrent usage\n- Configurable HTTP client and logger","status":"closed","priority":0,"issue_type":"feature","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:34:54.051926732+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T18:14:16.530243958+01:00","closed_at":"2026-01-15T18:14:16.530243958+01:00","close_reason":"Closed","dependencies":[{"issue_id":"kanboard-api-uls","depends_on_id":"kanboard-api-2g1","type":"blocks","created_at":"2026-01-15T17:42:48.457362117+01:00","created_by":"Oliver Jakoubek"},{"issue_id":"kanboard-api-uls","depends_on_id":"kanboard-api-k33","type":"blocks","created_at":"2026-01-15T17:42:48.576622508+01:00","created_by":"Oliver Jakoubek"},{"issue_id":"kanboard-api-uls","depends_on_id":"kanboard-api-s7k","type":"blocks","created_at":"2026-01-15T17:42:48.749342195+01:00","created_by":"Oliver Jakoubek"}]}
 {"id":"kanboard-api-una","title":"Implement TaskScope fluent builder (core methods)","description":"Implement TaskScope for fluent task-scoped operations (core methods).\n\n## Requirements\n- TaskScope struct with client and taskID\n- Client.Task(taskID int) *TaskScope method\n- Core TaskScope methods:\n  - Get(ctx) (*Task, error)\n  - Close(ctx) error\n  - Open(ctx) error\n  - MoveToColumn(ctx, columnID int) error\n  - MoveToProject(ctx, projectID int) error\n  - Update(ctx, params *TaskUpdateParams) error\n\n## Files to create\n- task_scope.go\n\n## Example usage\n```go\ntask, _ := client.Task(123).Get(ctx)\nclient.Task(123).Close(ctx)\nclient.Task(123).Update(ctx, kanboard.NewTaskUpdate().SetTitle(\"New\"))\n```\n\n## Acceptance criteria\n- All methods delegate to direct Client methods\n- Proper error propagation","status":"closed","priority":1,"issue_type":"feature","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:35:41.173930396+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T18:34:32.369975567+01:00","closed_at":"2026-01-15T18:34:32.369975567+01:00","close_reason":"Closed","dependencies":[{"issue_id":"kanboard-api-una","depends_on_id":"kanboard-api-91a","type":"blocks","created_at":"2026-01-15T17:43:31.198935686+01:00","created_by":"Oliver Jakoubek"},{"issue_id":"kanboard-api-una","depends_on_id":"kanboard-api-5fb","type":"blocks","created_at":"2026-01-15T17:43:31.261453756+01:00","created_by":"Oliver Jakoubek"}]}
 {"id":"kanboard-api-xhf","title":"Create example programs","description":"Create example programs demonstrating library usage.\n\n## Examples to create\n```\nexamples/\n├── basic/\n│   └── main.go       # Basic client setup and simple operations\n├── fluent/\n│   └── main.go       # Fluent API demonstration\n└── search/\n    └── main.go       # Search functionality demo\n```\n\n## basic/main.go\n- Client creation with API token\n- Get all projects\n- Get tasks from a project\n- Create a simple task\n\n## fluent/main.go\n- Client configuration with all options\n- Task creation with TaskParams\n- Task updates with TaskUpdateParams\n- Tag operations\n\n## search/main.go\n- Project-specific search\n- Global search across all projects\n\n## Files to create\n- examples/basic/main.go\n- examples/fluent/main.go\n- examples/search/main.go\n\n## Acceptance criteria\n- Examples compile and are well-commented\n- Cover main use cases\n- Show both fluent and direct API styles","status":"open","priority":3,"issue_type":"task","owner":"mail@oliverjakoubek.de","created_at":"2026-01-15T17:36:53.604889443+01:00","created_by":"Oliver Jakoubek","updated_at":"2026-01-15T17:36:53.604889443+01:00","dependencies":[{"issue_id":"kanboard-api-xhf","depends_on_id":"kanboard-api-2ze","type":"blocks","created_at":"2026-01-15T17:46:55.571585285+01:00","created_by":"Oliver Jakoubek"},{"issue_id":"kanboard-api-xhf","depends_on_id":"kanboard-api-una","type":"blocks","created_at":"2026-01-15T17:46:55.63515762+01:00","created_by":"Oliver Jakoubek"}]}

magefiles/go.mod

@@ -0,0 +1,7 @@
+//go:build ignore
+
+module code.beautifulmachines.dev/jakoubek/kanboard-api/magefiles
+
+go 1.25.5
+
+require github.com/magefile/mage v1.15.0

magefiles/go.sum

@@ -0,0 +1,2 @@
+github.com/magefile/mage v1.15.0 h1:BvGheCMAsG3bWUDbZ8AyXXpCNwU9u5CB6sM+HNb9HYg=
+github.com/magefile/mage v1.15.0/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=

magefiles/magefile.go

@@ -0,0 +1,63 @@
+//go:build mage
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+
+	"github.com/magefile/mage/sh"
+)
+
+// Test runs all tests with race detection and coverage.
+func Test() error {
+	fmt.Println("Running tests with race detection and coverage...")
+	return sh.RunV("go", "test", "-race", "-coverprofile=coverage.out", "./...")
+}
+
+// Coverage runs tests and opens the HTML coverage report in a browser.
+func Coverage() error {
+	if err := Test(); err != nil {
+		return err
+	}
+
+	fmt.Println("Generating HTML coverage report...")
+	if err := sh.RunV("go", "tool", "cover", "-html=coverage.out", "-o", "coverage.html"); err != nil {
+		return err
+	}
+
+	fmt.Println("Opening coverage report...")
+	return openBrowser("coverage.html")
+}
+
+// Lint runs golangci-lint.
+func Lint() error {
+	fmt.Println("Running golangci-lint...")
+	return sh.RunV("golangci-lint", "run", "./...")
+}
+
+// Build verifies the module compiles.
+func Build() error {
+	fmt.Println("Verifying module compiles...")
+	return sh.RunV("go", "build", "./...")
+}
+
+// openBrowser opens the specified file in the default browser.
+func openBrowser(file string) error {
+	var cmd *exec.Cmd
+	switch runtime.GOOS {
+	case "linux":
+		cmd = exec.Command("xdg-open", file)
+	case "darwin":
+		cmd = exec.Command("open", file)
+	case "windows":
+		cmd = exec.Command("rundll32", "url.dll,FileProtocolHandler", file)
+	default:
+		return fmt.Errorf("unsupported platform: %s", runtime.GOOS)
+	}
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Start()
+}