diff --git a/pkg/oonimkall/internal/tasks/chanlogger.go b/pkg/oonimkall/chanlogger.go
similarity index 54%
rename from pkg/oonimkall/internal/tasks/chanlogger.go
rename to pkg/oonimkall/chanlogger.go
index 8295349..0f8b957 100644
--- a/pkg/oonimkall/internal/tasks/chanlogger.go
+++ b/pkg/oonimkall/chanlogger.go
@@ -1,22 +1,20 @@
-package tasks
+package oonimkall
 
-import (
-	"fmt"
-)
+import "fmt"
 
-// ChanLogger is a logger targeting a channel
-type ChanLogger struct {
-	emitter    *EventEmitter
+// chanLogger is a logger targeting a channel
+type chanLogger struct {
+	emitter    *eventEmitter
 	hasdebug   bool
 	hasinfo    bool
 	haswarning bool
-	out        chan<- *Event
+	out        chan<- *event
 }
 
 // Debug implements Logger.Debug
-func (cl *ChanLogger) Debug(msg string) {
+func (cl *chanLogger) Debug(msg string) {
 	if cl.hasdebug {
-		cl.emitter.Emit("log", EventLog{
+		cl.emitter.Emit("log", eventLog{
 			LogLevel: "DEBUG",
 			Message:  msg,
 		})
@@ -24,16 +22,16 @@ func (cl *ChanLogger) Debug(msg string) {
 }
 
 // Debugf implements Logger.Debugf
-func (cl *ChanLogger) Debugf(format string, v ...interface{}) {
+func (cl *chanLogger) Debugf(format string, v ...interface{}) {
 	if cl.hasdebug {
 		cl.Debug(fmt.Sprintf(format, v...))
 	}
 }
 
 // Info implements Logger.Info
-func (cl *ChanLogger) Info(msg string) {
+func (cl *chanLogger) Info(msg string) {
 	if cl.hasinfo {
-		cl.emitter.Emit("log", EventLog{
+		cl.emitter.Emit("log", eventLog{
 			LogLevel: "INFO",
 			Message:  msg,
 		})
@@ -41,16 +39,16 @@ func (cl *ChanLogger) Info(msg string) {
 }
 
 // Infof implements Logger.Infof
-func (cl *ChanLogger) Infof(format string, v ...interface{}) {
+func (cl *chanLogger) Infof(format string, v ...interface{}) {
 	if cl.hasinfo {
 		cl.Info(fmt.Sprintf(format, v...))
 	}
 }
 
 // Warn implements Logger.Warn
-func (cl *ChanLogger) Warn(msg string) {
+func (cl *chanLogger) Warn(msg string) {
 	if cl.haswarning {
-		cl.emitter.Emit("log", EventLog{
+		cl.emitter.Emit("log", eventLog{
 			LogLevel: "WARNING",
 			Message:  msg,
 		})
@@ -58,16 +56,16 @@ func (cl *ChanLogger) Warn(msg string) {
 }
 
 // Warnf implements Logger.Warnf
-func (cl *ChanLogger) Warnf(format string, v ...interface{}) {
+func (cl *chanLogger) Warnf(format string, v ...interface{}) {
 	if cl.haswarning {
 		cl.Warn(fmt.Sprintf(format, v...))
 	}
 }
 
-// NewChanLogger creates a new ChanLogger instance.
-func NewChanLogger(emitter *EventEmitter, logLevel string,
-	out chan<- *Event) *ChanLogger {
-	cl := &ChanLogger{
+// newChanLogger creates a new ChanLogger instance.
+func newChanLogger(emitter *eventEmitter, logLevel string,
+	out chan<- *event) *chanLogger {
+	cl := &chanLogger{
 		emitter: emitter,
 		out:     out,
 	}
diff --git a/pkg/oonimkall/internal/tasks/event.go b/pkg/oonimkall/event.go
similarity index 77%
rename from pkg/oonimkall/internal/tasks/event.go
rename to pkg/oonimkall/event.go
index 86c0080..08e93f4 100644
--- a/pkg/oonimkall/internal/tasks/event.go
+++ b/pkg/oonimkall/event.go
@@ -1,14 +1,14 @@
-package tasks
+package oonimkall
 
 type eventEmpty struct{}
 
-// EventFailure contains information on a failure.
-type EventFailure struct {
+// eventFailure contains information on a failure.
+type eventFailure struct {
 	Failure string `json:"failure"`
 }
 
-// EventLog is an event containing a log message.
-type EventLog struct {
+// eventLog is an event containing a log message.
+type eventLog struct {
 	LogLevel string `json:"log_level"`
 	Message  string `json:"message"`
 }
@@ -33,8 +33,8 @@ type eventStatusGeoIPLookup struct {
 	ProbeNetworkName string `json:"probe_network_name"`
 }
 
-// EventStatusProgress reports progress information.
-type EventStatusProgress struct {
+// eventStatusProgress reports progress information.
+type eventStatusProgress struct {
 	Message    string  `json:"message"`
 	Percentage float64 `json:"percentage"`
 }
@@ -49,9 +49,9 @@ type eventStatusResolverLookup struct {
 	ResolverNetworkName string `json:"resolver_network_name"`
 }
 
-// Event is an event emitted by a task. This structure extends the event
+// event is an event emitted by a task. This structure extends the event
 // described by MK v0.10.9 FFI API (https://git.io/Jv4Rv).
-type Event struct {
+type event struct {
 	Key   string      `json:"key"`
 	Value interface{} `json:"value"`
 }
diff --git a/pkg/oonimkall/eventemitter.go b/pkg/oonimkall/eventemitter.go
new file mode 100644
index 0000000..d6aec3d
--- /dev/null
+++ b/pkg/oonimkall/eventemitter.go
@@ -0,0 +1,40 @@
+package oonimkall
+
+// eventEmitter emits event on a channel
+type eventEmitter struct {
+	disabled map[string]bool
+	out      chan<- *event
+}
+
+// newEventEmitter creates a new Emitter
+func newEventEmitter(disabledEvents []string, out chan<- *event) *eventEmitter {
+	ee := &eventEmitter{out: out}
+	ee.disabled = make(map[string]bool)
+	for _, eventname := range disabledEvents {
+		ee.disabled[eventname] = true
+	}
+	return ee
+}
+
+// EmitFailureStartup emits the failureStartup event
+func (ee *eventEmitter) EmitFailureStartup(failure string) {
+	ee.EmitFailureGeneric(failureStartup, failure)
+}
+
+// EmitFailureGeneric emits a failure event
+func (ee *eventEmitter) EmitFailureGeneric(name, failure string) {
+	ee.Emit(name, eventFailure{Failure: failure})
+}
+
+// EmitStatusProgress emits the status.Progress event
+func (ee *eventEmitter) EmitStatusProgress(percentage float64, message string) {
+	ee.Emit(statusProgress, eventStatusProgress{Message: message, Percentage: percentage})
+}
+
+// Emit emits the specified event
+func (ee *eventEmitter) Emit(key string, value interface{}) {
+	if ee.disabled[key] {
+		return
+	}
+	ee.out <- &event{Key: key, Value: value}
+}
diff --git a/pkg/oonimkall/internal/tasks/eventemitter_test.go b/pkg/oonimkall/eventemitter_test.go
similarity index 61%
rename from pkg/oonimkall/internal/tasks/eventemitter_test.go
rename to pkg/oonimkall/eventemitter_test.go
index 63630e3..a9183d6 100644
--- a/pkg/oonimkall/internal/tasks/eventemitter_test.go
+++ b/pkg/oonimkall/eventemitter_test.go
@@ -1,16 +1,12 @@
-package tasks_test
+package oonimkall
 
-import (
-	"testing"
-
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
-)
+import "testing"
 
 func TestDisabledEvents(t *testing.T) {
-	out := make(chan *tasks.Event)
-	emitter := tasks.NewEventEmitter([]string{"log"}, out)
+	out := make(chan *event)
+	emitter := newEventEmitter([]string{"log"}, out)
 	go func() {
-		emitter.Emit("log", tasks.EventLog{Message: "foo"})
+		emitter.Emit("log", eventLog{Message: "foo"})
 		close(out)
 	}()
 	var count int64
@@ -25,8 +21,8 @@ func TestDisabledEvents(t *testing.T) {
 }
 
 func TestEmitFailureStartup(t *testing.T) {
-	out := make(chan *tasks.Event)
-	emitter := tasks.NewEventEmitter([]string{}, out)
+	out := make(chan *event)
+	emitter := newEventEmitter([]string{}, out)
 	go func() {
 		emitter.EmitFailureStartup("mocked error")
 		close(out)
@@ -34,7 +30,7 @@ func TestEmitFailureStartup(t *testing.T) {
 	var found bool
 	for ev := range out {
 		if ev.Key == "failure.startup" {
-			evv := ev.Value.(tasks.EventFailure) // panic if not castable
+			evv := ev.Value.(eventFailure) // panic if not castable
 			if evv.Failure == "mocked error" {
 				found = true
 			}
@@ -46,8 +42,8 @@ func TestEmitFailureStartup(t *testing.T) {
 }
 
 func TestEmitStatusProgress(t *testing.T) {
-	out := make(chan *tasks.Event)
-	emitter := tasks.NewEventEmitter([]string{}, out)
+	out := make(chan *event)
+	emitter := newEventEmitter([]string{}, out)
 	go func() {
 		emitter.EmitStatusProgress(0.7, "foo")
 		close(out)
@@ -55,7 +51,7 @@ func TestEmitStatusProgress(t *testing.T) {
 	var found bool
 	for ev := range out {
 		if ev.Key == "status.progress" {
-			evv := ev.Value.(tasks.EventStatusProgress) // panic if not castable
+			evv := ev.Value.(eventStatusProgress) // panic if not castable
 			if evv.Message == "foo" && evv.Percentage == 0.7 {
 				found = true
 			}
diff --git a/pkg/oonimkall/internal/tasks/eventemitter.go b/pkg/oonimkall/internal/tasks/eventemitter.go
deleted file mode 100644
index 5d17be7..0000000
--- a/pkg/oonimkall/internal/tasks/eventemitter.go
+++ /dev/null
@@ -1,40 +0,0 @@
-package tasks
-
-// EventEmitter emits event on a channel
-type EventEmitter struct {
-	disabled map[string]bool
-	out      chan<- *Event
-}
-
-// NewEventEmitter creates a new Emitter
-func NewEventEmitter(disabledEvents []string, out chan<- *Event) *EventEmitter {
-	ee := &EventEmitter{out: out}
-	ee.disabled = make(map[string]bool)
-	for _, eventname := range disabledEvents {
-		ee.disabled[eventname] = true
-	}
-	return ee
-}
-
-// EmitFailureStartup emits the failureStartup event
-func (ee *EventEmitter) EmitFailureStartup(failure string) {
-	ee.EmitFailureGeneric(failureStartup, failure)
-}
-
-// EmitFailureGeneric emits a failure event
-func (ee *EventEmitter) EmitFailureGeneric(name, failure string) {
-	ee.Emit(name, EventFailure{Failure: failure})
-}
-
-// EmitStatusProgress emits the status.Progress event
-func (ee *EventEmitter) EmitStatusProgress(percentage float64, message string) {
-	ee.Emit(statusProgress, EventStatusProgress{Message: message, Percentage: percentage})
-}
-
-// Emit emits the specified event
-func (ee *EventEmitter) Emit(key string, value interface{}) {
-	if ee.disabled[key] == true {
-		return
-	}
-	ee.out <- &Event{Key: key, Value: value}
-}
diff --git a/pkg/oonimkall/internal/tasks/runner.go b/pkg/oonimkall/runner.go
similarity index 89%
rename from pkg/oonimkall/internal/tasks/runner.go
rename to pkg/oonimkall/runner.go
index f57ef74..cb76cd4 100644
--- a/pkg/oonimkall/internal/tasks/runner.go
+++ b/pkg/oonimkall/runner.go
@@ -1,5 +1,4 @@
-// Package tasks implements tasks run using the oonimkall API.
-package tasks
+package oonimkall
 
 import (
 	"context"
@@ -36,42 +35,42 @@ const (
 	statusStarted                = "status.started"
 )
 
-// Run runs the task specified by settings.Name until completion. This is the
+// run runs the task specified by settings.Name until completion. This is the
 // top-level API that should be called by oonimkall.
-func Run(ctx context.Context, settings *Settings, out chan<- *Event) {
-	r := NewRunner(settings, out)
+func run(ctx context.Context, settings *settings, out chan<- *event) {
+	r := newRunner(settings, out)
 	r.Run(ctx)
 }
 
-// Runner runs a specific task
-type Runner struct {
-	emitter             *EventEmitter
+// runner runs a specific task
+type runner struct {
+	emitter             *eventEmitter
 	maybeLookupLocation func(*engine.Session) error
-	out                 chan<- *Event
-	settings            *Settings
+	out                 chan<- *event
+	settings            *settings
 }
 
-// NewRunner creates a new task runner
-func NewRunner(settings *Settings, out chan<- *Event) *Runner {
-	return &Runner{
-		emitter:  NewEventEmitter(settings.DisabledEvents, out),
+// newRunner creates a new task runner
+func newRunner(settings *settings, out chan<- *event) *runner {
+	return &runner{
+		emitter:  newEventEmitter(settings.DisabledEvents, out),
 		out:      out,
 		settings: settings,
 	}
 }
 
-// FailureInvalidVersion is the failure returned when Version is invalid
-const FailureInvalidVersion = "invalid Settings.Version number"
+// failureInvalidVersion is the failure returned when Version is invalid
+const failureInvalidVersion = "invalid Settings.Version number"
 
-func (r *Runner) hasUnsupportedSettings(logger *ChanLogger) bool {
+func (r *runner) hasUnsupportedSettings(logger *chanLogger) bool {
 	if r.settings.Version < 1 {
-		r.emitter.EmitFailureStartup(FailureInvalidVersion)
+		r.emitter.EmitFailureStartup(failureInvalidVersion)
 		return true
 	}
 	return false
 }
 
-func (r *Runner) newsession(ctx context.Context, logger *ChanLogger) (*engine.Session, error) {
+func (r *runner) newsession(ctx context.Context, logger *chanLogger) (*engine.Session, error) {
 	kvstore, err := kvstore.NewFS(r.settings.StateDir)
 	if err != nil {
 		return nil, err
@@ -106,7 +105,7 @@ func (r *Runner) newsession(ctx context.Context, logger *ChanLogger) (*engine.Se
 	return engine.NewSession(ctx, config)
 }
 
-func (r *Runner) contextForExperiment(
+func (r *runner) contextForExperiment(
 	ctx context.Context, builder *engine.ExperimentBuilder,
 ) context.Context {
 	if builder.Interruptible() {
@@ -116,11 +115,11 @@ func (r *Runner) contextForExperiment(
 }
 
 type runnerCallbacks struct {
-	emitter *EventEmitter
+	emitter *eventEmitter
 }
 
 func (cb *runnerCallbacks) OnProgress(percentage float64, message string) {
-	cb.emitter.Emit(statusProgress, EventStatusProgress{
+	cb.emitter.Emit(statusProgress, eventStatusProgress{
 		Percentage: 0.4 + (percentage * 0.6), // open report is 40%
 		Message:    message,
 	})
@@ -129,8 +128,8 @@ func (cb *runnerCallbacks) OnProgress(percentage float64, message string) {
 // Run runs the runner until completion. The context argument controls
 // when to stop when processing multiple inputs, as well as when to stop
 // experiments explicitly marked as interruptible.
-func (r *Runner) Run(ctx context.Context) {
-	logger := NewChanLogger(r.emitter, r.settings.LogLevel, r.out)
+func (r *runner) Run(ctx context.Context) {
+	logger := newChanLogger(r.emitter, r.settings.LogLevel, r.out)
 	r.emitter.Emit(statusQueued, eventEmpty{})
 	if r.hasUnsupportedSettings(logger) {
 		return
diff --git a/pkg/oonimkall/internal/tasks/runner_integration_test.go b/pkg/oonimkall/runner_integration_test.go
similarity index 80%
rename from pkg/oonimkall/internal/tasks/runner_integration_test.go
rename to pkg/oonimkall/runner_integration_test.go
index f508108..e4c2988 100644
--- a/pkg/oonimkall/internal/tasks/runner_integration_test.go
+++ b/pkg/oonimkall/runner_integration_test.go
@@ -1,4 +1,4 @@
-package tasks_test
+package oonimkall
 
 import (
 	"context"
@@ -8,8 +8,6 @@ import (
 	"sync"
 	"testing"
 	"time"
-
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 func TestRunnerMaybeLookupBackendsFailure(t *testing.T) {
@@ -17,11 +15,11 @@ func TestRunnerMaybeLookupBackendsFailure(t *testing.T) {
 		w.WriteHeader(500)
 	}))
 	defer server.Close()
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		Name:      "Example",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			ProbeServicesBaseURL: server.URL,
 			SoftwareName:         "oonimkall-test",
 			SoftwareVersion:      "0.1.0",
@@ -30,14 +28,14 @@ func TestRunnerMaybeLookupBackendsFailure(t *testing.T) {
 		Version:  1,
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var failures []string
 	for ev := range out {
 		switch ev.Key {
 		case "failure.startup":
-			failure := ev.Value.(tasks.EventFailure).Failure
+			failure := ev.Value.(eventFailure).Failure
 			failures = append(failures, failure)
 		case "status.queued", "status.started", "log", "status.end":
 		default:
@@ -71,11 +69,11 @@ func TestRunnerOpenReportFailure(t *testing.T) {
 		w.WriteHeader(500)
 	}))
 	defer server.Close()
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		Name:      "Example",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			ProbeServicesBaseURL: server.URL,
 			SoftwareName:         "oonimkall-test",
 			SoftwareVersion:      "0.1.0",
@@ -91,7 +89,7 @@ func TestRunnerOpenReportFailure(t *testing.T) {
 			case "failure.report_create":
 				seen++
 			case "status.progress":
-				evv := ev.Value.(tasks.EventStatusProgress)
+				evv := ev.Value.(eventStatusProgress)
 				if evv.Percentage >= 0.4 {
 					panic(fmt.Sprintf("too much progress: %+v", ev))
 				}
@@ -103,7 +101,7 @@ func TestRunnerOpenReportFailure(t *testing.T) {
 		}
 		seench <- seen
 	}()
-	tasks.Run(context.Background(), settings, out)
+	run(context.Background(), settings, out)
 	close(out)
 	if n := <-seench; n != 1 {
 		t.Fatal("unexpected number of events")
@@ -114,12 +112,12 @@ func TestRunnerGood(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		LogLevel:  "DEBUG",
 		Name:      "Example",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
 		},
@@ -127,7 +125,7 @@ func TestRunnerGood(t *testing.T) {
 		Version:  1,
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var found bool
@@ -145,32 +143,32 @@ func TestRunnerWithUnsupportedSettings(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		LogLevel:  "DEBUG",
 		Name:      "Example",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
 		},
 		StateDir: "../../testdata/oonimkall/state",
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var failures []string
 	for ev := range out {
 		if ev.Key == "failure.startup" {
-			failure := ev.Value.(tasks.EventFailure).Failure
+			failure := ev.Value.(eventFailure).Failure
 			failures = append(failures, failure)
 		}
 	}
 	if len(failures) != 1 {
 		t.Fatal("invalid number of failures")
 	}
-	if failures[0] != tasks.FailureInvalidVersion {
+	if failures[0] != failureInvalidVersion {
 		t.Fatal("not the failure we expected")
 	}
 }
@@ -179,12 +177,12 @@ func TestRunnerWithInvalidKVStorePath(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		LogLevel:  "DEBUG",
 		Name:      "Example",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
 		},
@@ -192,13 +190,13 @@ func TestRunnerWithInvalidKVStorePath(t *testing.T) {
 		Version:  1,
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var failures []string
 	for ev := range out {
 		if ev.Key == "failure.startup" {
-			failure := ev.Value.(tasks.EventFailure).Failure
+			failure := ev.Value.(eventFailure).Failure
 			failures = append(failures, failure)
 		}
 	}
@@ -214,12 +212,12 @@ func TestRunnerWithInvalidExperimentName(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		LogLevel:  "DEBUG",
 		Name:      "Nonexistent",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
 		},
@@ -227,13 +225,13 @@ func TestRunnerWithInvalidExperimentName(t *testing.T) {
 		Version:  1,
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var failures []string
 	for ev := range out {
 		if ev.Key == "failure.startup" {
-			failure := ev.Value.(tasks.EventFailure).Failure
+			failure := ev.Value.(eventFailure).Failure
 			failures = append(failures, failure)
 		}
 	}
@@ -249,12 +247,12 @@ func TestRunnerWithMissingInput(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		LogLevel:  "DEBUG",
 		Name:      "ExampleWithInput",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
 		},
@@ -262,13 +260,13 @@ func TestRunnerWithMissingInput(t *testing.T) {
 		Version:  1,
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var failures []string
 	for ev := range out {
 		if ev.Key == "failure.startup" {
-			failure := ev.Value.(tasks.EventFailure).Failure
+			failure := ev.Value.(eventFailure).Failure
 			failures = append(failures, failure)
 		}
 	}
@@ -284,13 +282,13 @@ func TestRunnerWithMaxRuntime(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		Inputs:    []string{"a", "b", "c", "d", "e", "f", "g", "h", "i"},
 		LogLevel:  "DEBUG",
 		Name:      "ExampleWithInput",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			MaxRuntime:      1,
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
@@ -300,7 +298,7 @@ func TestRunnerWithMaxRuntime(t *testing.T) {
 	}
 	begin := time.Now()
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var found bool
@@ -320,7 +318,7 @@ func TestRunnerWithMaxRuntime(t *testing.T) {
 	// 1. https://github.com/ooni/probe-cli/v3/internal/engine/pull/588/checks?check_run_id=667263788
 	//
 	// 2. https://github.com/ooni/probe-cli/v3/internal/engine/pull/588/checks?check_run_id=667263855
-	if time.Now().Sub(begin) > 10*time.Second {
+	if time.Since(begin) > 10*time.Second {
 		t.Fatal("expected shorter runtime")
 	}
 }
@@ -329,13 +327,13 @@ func TestRunnerWithMaxRuntimeNonInterruptible(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		Inputs:    []string{"a", "b", "c", "d", "e", "f", "g", "h", "i"},
 		LogLevel:  "DEBUG",
 		Name:      "ExampleWithInputNonInterruptible",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			MaxRuntime:      1,
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
@@ -345,7 +343,7 @@ func TestRunnerWithMaxRuntimeNonInterruptible(t *testing.T) {
 	}
 	begin := time.Now()
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var found bool
@@ -365,7 +363,7 @@ func TestRunnerWithMaxRuntimeNonInterruptible(t *testing.T) {
 	// 1. https://github.com/ooni/probe-cli/v3/internal/engine/pull/588/checks?check_run_id=667263788
 	//
 	// 2. https://github.com/ooni/probe-cli/v3/internal/engine/pull/588/checks?check_run_id=667263855
-	if time.Now().Sub(begin) > 10*time.Second {
+	if time.Since(begin) > 10*time.Second {
 		t.Fatal("expected shorter runtime")
 	}
 }
@@ -374,13 +372,13 @@ func TestRunnerWithFailedMeasurement(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *tasks.Event)
-	settings := &tasks.Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		Inputs:    []string{"a", "b", "c", "d", "e", "f", "g", "h", "i"},
 		LogLevel:  "DEBUG",
 		Name:      "ExampleWithFailure",
-		Options: tasks.SettingsOptions{
+		Options: settingsOptions{
 			MaxRuntime:      1,
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
@@ -389,7 +387,7 @@ func TestRunnerWithFailedMeasurement(t *testing.T) {
 		Version:  1,
 	}
 	go func() {
-		tasks.Run(context.Background(), settings, out)
+		run(context.Background(), settings, out)
 		close(out)
 	}()
 	var found bool
diff --git a/pkg/oonimkall/internal/tasks/runner_internal_test.go b/pkg/oonimkall/runner_internal_test.go
similarity index 91%
rename from pkg/oonimkall/internal/tasks/runner_internal_test.go
rename to pkg/oonimkall/runner_internal_test.go
index 175dead..9b83af3 100644
--- a/pkg/oonimkall/internal/tasks/runner_internal_test.go
+++ b/pkg/oonimkall/runner_internal_test.go
@@ -1,4 +1,4 @@
-package tasks
+package oonimkall
 
 import (
 	"context"
@@ -32,11 +32,11 @@ func TestRunnerMaybeLookupLocationFailure(t *testing.T) {
 		// TODO(https://github.com/ooni/probe-cli/pull/518)
 		t.Skip("skip test in short mode")
 	}
-	out := make(chan *Event)
-	settings := &Settings{
+	out := make(chan *event)
+	settings := &settings{
 		AssetsDir: "../../testdata/oonimkall/assets",
 		Name:      "Example",
-		Options: SettingsOptions{
+		Options: settingsOptions{
 			SoftwareName:    "oonimkall-test",
 			SoftwareVersion: "0.1.0",
 		},
@@ -52,7 +52,7 @@ func TestRunnerMaybeLookupLocationFailure(t *testing.T) {
 				"failure.cc_lookup", "failure.resolver_lookup":
 				seen++
 			case "status.progress":
-				evv := ev.Value.(EventStatusProgress)
+				evv := ev.Value.(eventStatusProgress)
 				if evv.Percentage >= 0.2 {
 					panic(fmt.Sprintf("too much progress: %+v", ev))
 				}
@@ -64,7 +64,7 @@ func TestRunnerMaybeLookupLocationFailure(t *testing.T) {
 		seench <- seen
 	}()
 	expected := errors.New("mocked error")
-	r := NewRunner(settings, out)
+	r := newRunner(settings, out)
 	r.maybeLookupLocation = func(*engine.Session) error {
 		return expected
 	}
diff --git a/pkg/oonimkall/internal/tasks/settings.go b/pkg/oonimkall/settings.go
similarity index 95%
rename from pkg/oonimkall/internal/tasks/settings.go
rename to pkg/oonimkall/settings.go
index 8cbc8c6..d18eafd 100644
--- a/pkg/oonimkall/internal/tasks/settings.go
+++ b/pkg/oonimkall/settings.go
@@ -1,9 +1,9 @@
-package tasks
+package oonimkall
 
 // Settings contains settings for a task. This structure derives from
 // the one described by MK v0.10.9 FFI API (https://git.io/Jv4Rv), yet
 // since 2020-12-03 we're not backwards compatible anymore.
-type Settings struct {
+type settings struct {
 	// Annotations contains the annotations to be added
 	// to every measurements performed by the task.
 	Annotations map[string]string `json:"annotations,omitempty"`
@@ -30,7 +30,7 @@ type Settings struct {
 	Name string `json:"name"`
 
 	// Options contains the task options.
-	Options SettingsOptions `json:"options"`
+	Options settingsOptions `json:"options"`
 
 	// Proxy allows you to optionally force a specific proxy
 	// rather than using no proxy (the default).
@@ -66,8 +66,8 @@ type Settings struct {
 	Version int64 `json:"version"`
 }
 
-// SettingsOptions contains the settings options
-type SettingsOptions struct {
+// settingsOptions contains the settings options
+type settingsOptions struct {
 	// MaxRuntime is the maximum runtime expressed in seconds. A negative
 	// value for this field disables the maximum runtime. Using
 	// a zero value will also mean disabled. This is not the
diff --git a/pkg/oonimkall/task.go b/pkg/oonimkall/task.go
index 07c3c9e..1d548b3 100644
--- a/pkg/oonimkall/task.go
+++ b/pkg/oonimkall/task.go
@@ -45,7 +45,6 @@ import (
 
 	"github.com/ooni/probe-cli/v3/internal/atomicx"
 	"github.com/ooni/probe-cli/v3/internal/runtimex"
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 // Task is an asynchronous task running an experiment. It mimics the
@@ -63,13 +62,13 @@ type Task struct {
 	cancel    context.CancelFunc
 	isdone    *atomicx.Int64
 	isstopped *atomicx.Int64
-	out       chan *tasks.Event
+	out       chan *event
 }
 
 // StartTask starts an asynchronous task. The input argument is a
 // serialized JSON conforming to MK v0.10.9's API.
 func StartTask(input string) (*Task, error) {
-	var settings tasks.Settings
+	var settings settings
 	if err := json.Unmarshal([]byte(input), &settings); err != nil {
 		return nil, err
 	}
@@ -79,12 +78,12 @@ func StartTask(input string) (*Task, error) {
 		cancel:    cancel,
 		isdone:    &atomicx.Int64{},
 		isstopped: &atomicx.Int64{},
-		out:       make(chan *tasks.Event, bufsiz),
+		out:       make(chan *event, bufsiz),
 	}
 	go func() {
 		defer close(task.out)
 		defer task.isstopped.Add(1)
-		tasks.Run(ctx, &settings, task.out)
+		run(ctx, &settings, task.out)
 	}()
 	return task, nil
 }
diff --git a/pkg/oonimkall/task_integration_test.go b/pkg/oonimkall/task_integration_test.go
index bfb149f..194ac2d 100644
--- a/pkg/oonimkall/task_integration_test.go
+++ b/pkg/oonimkall/task_integration_test.go
@@ -1,4 +1,4 @@
-package oonimkall_test
+package oonimkall
 
 import (
 	"encoding/json"
@@ -9,8 +9,6 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/ooni/probe-cli/v3/internal/engine/model"
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall"
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 type eventlike struct {
@@ -22,7 +20,7 @@ func TestGood(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"log_level": "DEBUG",
 		"name": "Example",
@@ -69,7 +67,7 @@ func TestWithMeasurementFailure(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"log_level": "DEBUG",
 		"name": "ExampleWithFailure",
@@ -98,7 +96,7 @@ func TestWithMeasurementFailure(t *testing.T) {
 }
 
 func TestInvalidJSON(t *testing.T) {
-	task, err := oonimkall.StartTask(`{`)
+	task, err := StartTask(`{`)
 	var syntaxerr *json.SyntaxError
 	if !errors.As(err, &syntaxerr) {
 		t.Fatal("not the expected error")
@@ -109,7 +107,7 @@ func TestInvalidJSON(t *testing.T) {
 }
 
 func TestUnsupportedSetting(t *testing.T) {
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"log_level": "DEBUG",
 		"name": "Example",
@@ -130,7 +128,7 @@ func TestUnsupportedSetting(t *testing.T) {
 			t.Fatal(err)
 		}
 		if event.Key == "failure.startup" {
-			if strings.Contains(eventstr, tasks.FailureInvalidVersion) {
+			if strings.Contains(eventstr, failureInvalidVersion) {
 				seen = true
 			}
 		}
@@ -141,7 +139,7 @@ func TestUnsupportedSetting(t *testing.T) {
 }
 
 func TestEmptyStateDir(t *testing.T) {
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"log_level": "DEBUG",
 		"name": "Example",
@@ -173,7 +171,7 @@ func TestEmptyStateDir(t *testing.T) {
 }
 
 func TestUnknownExperiment(t *testing.T) {
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"log_level": "DEBUG",
 		"name": "Antani",
@@ -209,7 +207,7 @@ func TestInputIsRequired(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"log_level": "DEBUG",
 		"name": "ExampleWithInput",
@@ -246,7 +244,7 @@ func TestMaxRuntime(t *testing.T) {
 		t.Skip("skip test in short mode")
 	}
 	begin := time.Now()
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"inputs": ["a", "b", "c"],
 		"name": "ExampleWithInput",
@@ -293,7 +291,7 @@ func TestInterruptExampleWithInput(t *testing.T) {
 		t.Skip("skip test in short mode")
 	}
 	t.Skip("Skipping broken test; see https://github.com/ooni/probe-cli/v3/internal/engine/issues/992")
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"inputs": [
 			"http://www.kernel.org/",
@@ -360,7 +358,7 @@ func TestInterruptNdt7(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"name": "Ndt7",
 		"options": {
@@ -417,7 +415,7 @@ func TestCountBytesForExample(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"name": "Example",
 		"options": {
@@ -457,7 +455,7 @@ func TestPrivacyAndScrubbing(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 			"assets_dir": "../testdata/oonimkall/assets",
 			"name": "Example",
 			"options": {
@@ -500,7 +498,7 @@ func TestNonblock(t *testing.T) {
 	if testing.Short() {
 		t.Skip("skip test in short mode")
 	}
-	task, err := oonimkall.StartTask(`{
+	task, err := StartTask(`{
 		"assets_dir": "../testdata/oonimkall/assets",
 		"name": "Example",
 		"options": {