diff --git a/scripts/autoload/credits_service.gd b/scripts/autoload/credits_service.gd
index a7681e2..167f9ed 100644
--- a/scripts/autoload/credits_service.gd
+++ b/scripts/autoload/credits_service.gd
@@ -9,6 +9,7 @@ signal award_received(amount: int, reason: String)
 signal ledger_changed
 
 const EndpointConfig := preload("res://scripts/autoload/api_endpoint_config.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 const DEFAULT_URL := "https://us3q.ranaze.com/api/credits"
 
 var credits: int = 0
@@ -86,7 +87,8 @@ func apply_award_response(parsed: Dictionary) -> void:
 			continue
 		var award: Dictionary = award_variant
 		var amount := int(award.get("amount", 0))
-		if amount > 0:
+		var reason_code := str(award.get("reasonCode", award.get("reason_code", "")))
+		if amount > 0 and (FeatureFlags.progression_enabled() or not FeatureFlags.is_progression_reward(reason_code)):
 			award_received.emit(amount, str(award.get("description", "Learning reward")))
 
 
diff --git a/scripts/config/feature_flags.gd b/scripts/config/feature_flags.gd
new file mode 100644
index 0000000..e56eeb4
--- /dev/null
+++ b/scripts/config/feature_flags.gd
@@ -0,0 +1,17 @@
+extends RefCounted
+
+
+static func progression_enabled() -> bool:
+	return str(ProjectSettings.get_setting("step3/deployment_environment", "development")).to_lower() == "uat"
+
+
+static func is_progression_reward(reason_code: String) -> bool:
+	return reason_code in [
+		"mastery_practicing",
+		"mastery_strong",
+		"mastery_mastered",
+		"session_goal_complete",
+		"daily_mission_complete",
+		"weekly_goal_complete",
+		"rank_promotion",
+	]
diff --git a/scripts/config/feature_flags.gd.uid b/scripts/config/feature_flags.gd.uid
new file mode 100644
index 0000000..569bb59
--- /dev/null
+++ b/scripts/config/feature_flags.gd.uid
@@ -0,0 +1 @@
+uid://bve4tb6xllsnf
diff --git a/scripts/ui/block_setup.gd b/scripts/ui/block_setup.gd
index cb50181..014998a 100644
--- a/scripts/ui/block_setup.gd
+++ b/scripts/ui/block_setup.gd
@@ -1,6 +1,7 @@
 extends VBoxContainer
 
 const Style := preload("res://scripts/ui/ui_style.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 
 var main: Control
 var selected_system := "All Systems"
@@ -14,6 +15,7 @@ var targeted_setup := false
 var goal_option: OptionButton
 var target_label: Label
 var pending_launch := false
+var goal_row: HBoxContainer
 
 func _ready() -> void:
 	set_anchors_preset(Control.PRESET_FULL_RECT)
@@ -32,7 +34,8 @@ func _ready() -> void:
 	Style.set_label(system_label, 22, Style.CYAN)
 	add_child(system_label)
 
-	var goal_row := HBoxContainer.new()
+	goal_row = HBoxContainer.new()
+	goal_row.visible = FeatureFlags.progression_enabled()
 	var goal_label := Label.new()
 	goal_label.text = "Finish line"
 	goal_row.add_child(goal_label)
@@ -88,7 +91,7 @@ func _ready() -> void:
 
 
 func on_show(payload: Variant = null) -> void:
-	if typeof(payload) == TYPE_DICTIONARY:
+	if typeof(payload) == TYPE_DICTIONARY and FeatureFlags.progression_enabled():
 		targeted_setup = bool(payload.get("mastery_target", false))
 		selected_system = str(payload.get("step3_system", "All Systems"))
 		requested_count = int(payload.get("question_count", 10))
@@ -102,7 +105,7 @@ func on_show(payload: Variant = null) -> void:
 	else:
 		goal_option.set_meta("mastery_target", false)
 		targeted_setup = false
-		selected_system = str(payload) if payload != null else "All Systems"
+		selected_system = str(payload.get("step3_system", "All Systems")) if typeof(payload) == TYPE_DICTIONARY else (str(payload) if payload != null else "All Systems")
 	_refresh_setup()
 
 
@@ -130,6 +133,10 @@ func _start_block() -> void:
 	if not QuestionBankService.has_questions():
 		status_label.text = "Questions have not loaded from the API yet."
 		return
+	if not FeatureFlags.progression_enabled():
+		BlockSessionService.start_block(selected_system, int(size_spin.value), mode_option.get_item_text(mode_option.selected))
+		main.show_screen("player")
+		return
 	pending_launch = true
 	start_button.disabled = true
 	status_label.text = "Preparing your study goal..."
diff --git a/scripts/ui/dashboard_screen.gd b/scripts/ui/dashboard_screen.gd
index 1cea3e1..8b686ea 100644
--- a/scripts/ui/dashboard_screen.gd
+++ b/scripts/ui/dashboard_screen.gd
@@ -6,6 +6,7 @@ const ActivityChart := preload("res://scripts/ui/dashboard_activity_chart.gd")
 const DashboardSparkline := preload("res://scripts/ui/dashboard_sparkline.gd")
 const DashboardSegmentBar := preload("res://scripts/ui/dashboard_segment_bar.gd")
 const DashboardInfoBadge := preload("res://scripts/ui/dashboard_info_badge.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 
 var main: Control
 var scroll: ScrollContainer
@@ -93,9 +94,11 @@ func _build() -> void:
 	stat_card_grid.add_theme_constant_override("h_separation", 12)
 	stat_card_grid.add_theme_constant_override("v_separation", 12)
 	content.add_child(stat_card_grid)
-	mission_content = VBoxContainer.new()
-	mission_content.add_theme_constant_override("separation", 10)
-	content.add_child(_card(mission_content, 16))
+	mission_content = null
+	if FeatureFlags.progression_enabled():
+		mission_content = VBoxContainer.new()
+		mission_content.add_theme_constant_override("separation", 10)
+		content.add_child(_card(mission_content, 16))
 
 	qbank_sparkline = DashboardSparkline.new()
 	qbank_sparkline.custom_minimum_size = Vector2(0, 34)
@@ -147,7 +150,7 @@ func _build() -> void:
 	performance.add_child(trend_chart)
 	performance.add_child(HSeparator.new())
 	var system_header := HBoxContainer.new()
-	system_header.add_child(_section_title("System mastery path"))
+	system_header.add_child(_section_title("System mastery path" if FeatureFlags.progression_enabled() else "Performance by system"))
 	var header_space := Control.new()
 	header_space.size_flags_horizontal = Control.SIZE_EXPAND_FILL
 	system_header.add_child(header_space)
@@ -166,9 +169,11 @@ func _build() -> void:
 	right_column.add_theme_constant_override("separation", 12)
 	right_column.size_flags_horizontal = Control.SIZE_EXPAND_FILL
 	analytics_grid.add_child(right_column)
-	rank_content = VBoxContainer.new()
-	rank_content.add_theme_constant_override("separation", 9)
-	right_column.add_child(_card(rank_content, 16))
+	rank_content = null
+	if FeatureFlags.progression_enabled():
+		rank_content = VBoxContainer.new()
+		rank_content.add_theme_constant_override("separation", 9)
+		right_column.add_child(_card(rank_content, 16))
 	focus_content = VBoxContainer.new()
 	focus_content.add_theme_constant_override("separation", 10)
 	right_column.add_child(_card(focus_content, 16))
@@ -196,9 +201,11 @@ func _build() -> void:
 	weekly_summary.add_theme_constant_override("separation", 10)
 	weekly_row.add_child(weekly_summary)
 	weekly.add_child(HSeparator.new())
-	weekly_goal_content = VBoxContainer.new()
-	weekly_goal_content.add_theme_constant_override("separation", 8)
-	weekly.add_child(weekly_goal_content)
+	weekly_goal_content = null
+	if FeatureFlags.progression_enabled():
+		weekly_goal_content = VBoxContainer.new()
+		weekly_goal_content.add_theme_constant_override("separation", 8)
+		weekly.add_child(weekly_goal_content)
 	lower_grid.add_child(_card(weekly, 16))
 	recent_list = VBoxContainer.new()
 	recent_list.add_theme_constant_override("separation", 6)
@@ -225,16 +232,22 @@ func _render() -> void:
 	_render_readiness_card(data)
 	_render_accuracy_card(data)
 	trend_chart.set_series(data.get("performanceTrend", []), trend_mode, UIThemeService.is_dark_mode())
-	_render_systems(data.get("systems", []))
-	_render_focus(data.get("systems", []))
+	if FeatureFlags.progression_enabled():
+		_render_systems(data.get("systems", []))
+		_render_focus(data.get("systems", []))
+	else:
+		_render_systems_legacy(data.get("systems", []))
+		_render_focus_legacy(data.get("systems", []))
 	_render_review(data)
-	_render_rank(data.get("progression", {}))
+	if FeatureFlags.progression_enabled():
+		_render_rank(data.get("progression", {}))
 	var weekly: Array = data.get("weeklyActivity", [])
 	activity_chart.set_days(weekly, UIThemeService.is_dark_mode())
 	_render_weekly(data, weekly)
 	_render_recent(data.get("recentActivity", []))
-	_render_missions()
-	_render_weekly_goal()
+	if FeatureFlags.progression_enabled():
+		_render_missions()
+		_render_weekly_goal()
 
 
 func _render_rank(value: Variant) -> void:
@@ -845,6 +858,10 @@ func _start_review_queue(step3_system: String = "") -> void:
 	pending_review_launch = true
 	_show_loading_message("Preparing your review queue...")
 	set_meta("pending_review_system", step3_system)
+	if not FeatureFlags.progression_enabled():
+		review_queue_service.start_pass(step3_system)
+		_render_review(DashboardService.data)
+		return
 	if not StudySessionService.session_started.is_connected(_on_review_session_started):
 		StudySessionService.session_started.connect(_on_review_session_started)
 	if not StudySessionService.session_failed.is_connected(_on_review_session_failed):
diff --git a/scripts/ui/main.gd b/scripts/ui/main.gd
index 308a691..2b4a16e 100644
--- a/scripts/ui/main.gd
+++ b/scripts/ui/main.gd
@@ -4,6 +4,7 @@ const Style := preload("res://scripts/ui/ui_style.gd")
 const Brand := preload("res://scripts/ui/medmind_style.gd")
 const NavigationRoutes := preload("res://scripts/ui/navigation_routes.gd")
 const CreditsBadge := preload("res://scripts/ui/credits_badge.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 
 var screens := {}
 var _account_profile_synced := false
@@ -39,7 +40,8 @@ func _ready() -> void:
 	Style.apply_app_theme(self)
 	_build_ui()
 	CreditsService.award_received.connect(_show_coin_award)
-	StudySessionService.session_completed.connect(_on_study_session_completed)
+	if FeatureFlags.progression_enabled():
+		StudySessionService.session_completed.connect(_on_study_session_completed)
 	theme_service.theme_changed.connect(_on_theme_changed)
 	resized.connect(_update_responsive_layout)
 	_update_responsive_layout()
@@ -47,6 +49,8 @@ func _ready() -> void:
 
 
 func _on_study_session_completed(summary: Dictionary) -> void:
+	if not FeatureFlags.progression_enabled():
+		return
 	WeeklyGoalService.refresh()
 	call_deferred("show_screen", "session_summary", summary)
 
@@ -293,11 +297,12 @@ func _build_ui() -> void:
 	screens_container.add_child(review)
 	screens["review"] = review
 
-	var session_summary := preload("res://scripts/ui/session_summary.gd").new()
-	session_summary.name = "SessionSummary"
-	session_summary.main = self
-	screens_container.add_child(session_summary)
-	screens["session_summary"] = session_summary
+	if FeatureFlags.progression_enabled():
+		var session_summary := preload("res://scripts/ui/session_summary.gd").new()
+		session_summary.name = "SessionSummary"
+		session_summary.main = self
+		screens_container.add_child(session_summary)
+		screens["session_summary"] = session_summary
 
 	var review_queue_results := preload("res://scripts/ui/review_queue_results.gd").new()
 	review_queue_results.name = "ReviewQueueResults"
diff --git a/scripts/ui/progress_profile.gd b/scripts/ui/progress_profile.gd
index 209436b..94e92c8 100644
--- a/scripts/ui/progress_profile.gd
+++ b/scripts/ui/progress_profile.gd
@@ -1,6 +1,7 @@
 extends Control
 
 const Brand := preload("res://scripts/ui/medmind_style.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 
 var main: Control
 var scroll: ScrollContainer
@@ -96,7 +97,9 @@ func _build() -> void:
 	right.add_theme_constant_override("separation", 14)
 	columns.add_child(right)
 	right.add_child(_outcome_card())
-	right.add_child(_progression_card())
+	progression_content = null
+	if FeatureFlags.progression_enabled():
+		right.add_child(_progression_card())
 	right.add_child(_connected_accounts_card())
 	right.add_child(_account_actions_card())
 	_refresh_back_to_session_visibility()
@@ -288,7 +291,8 @@ func _render() -> void:
 	_set_metric("cases", str(int(data.get("ccsCasesCompleted", 0))))
 	_set_metric("streak", "%d days" % int(data.get("currentStreak", 0)))
 	_render_systems(data.get("systems", []))
-	_render_progression(data.get("progression", {}))
+	if FeatureFlags.progression_enabled():
+		_render_progression(data.get("progression", {}))
 	_render_outcome()
 
 
diff --git a/scripts/ui/question_player.gd b/scripts/ui/question_player.gd
index 1cccd23..e58c633 100644
--- a/scripts/ui/question_player.gd
+++ b/scripts/ui/question_player.gd
@@ -6,6 +6,7 @@ const FlashcardPrefillDialog := preload("res://scripts/ui/flashcard_prefill_dial
 const CalculatorPanel := preload("res://scripts/ui/calculator_panel.gd")
 const SlotMachinePanel := preload("res://scripts/ui/rz_slot_machine_screen.gd")
 const CreditsBadge := preload("res://scripts/ui/credits_badge.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 const CLEAR_HIGHLIGHT_DARK_ICON := preload("res://assets/icons/medmind/clear-highlight-dark.svg")
 const CLEAR_HIGHLIGHT_LIGHT_ICON := preload("res://assets/icons/medmind/clear-highlight-light.svg")
 const LABS_DARK_ICON := preload("res://assets/icons/medmind/labs-dark.svg")
@@ -1224,7 +1225,7 @@ func _process(delta: float) -> void:
 		return
 	if visible and BlockSessionService.block_started and BlockSessionService.session_kind == "core":
 		_update_timer_bar()
-	var duration_goal := str(StudySessionService.progress.get("goalType", "")) == "duration"
+	var duration_goal := FeatureFlags.progression_enabled() and str(StudySessionService.progress.get("goalType", "")) == "duration"
 	if visible and BlockSessionService.block_started and (BlockSessionService.mode == "Timed" or duration_goal) and (report_overlay == null or not report_overlay.visible):
 		BlockSessionService.seconds_remaining = max(0.0, BlockSessionService.seconds_remaining - delta)
 		var shown_seconds := int(ceil(BlockSessionService.seconds_remaining))
@@ -2081,10 +2082,10 @@ func _open_reference_url(url: String) -> void:
 
 
 func _advance_or_finish() -> void:
-	if not StudySessionService.summary.is_empty():
+	if FeatureFlags.progression_enabled() and not StudySessionService.summary.is_empty():
 		StudySessionService.emit_deferred_summary()
 		return
-	if str(StudySessionService.progress.get("goalType", "")) == "duration" and BlockSessionService.seconds_remaining <= 0:
+	if FeatureFlags.progression_enabled() and str(StudySessionService.progress.get("goalType", "")) == "duration" and BlockSessionService.seconds_remaining <= 0:
 		StudySessionService.check_completion()
 		return
 	if BlockSessionService.move_next():
@@ -2111,7 +2112,7 @@ func _finish() -> void:
 
 
 func _exit_run() -> void:
-	if StudySessionService.is_active() and BlockSessionService.session_kind != "simulation":
+	if FeatureFlags.progression_enabled() and StudySessionService.is_active() and BlockSessionService.session_kind != "simulation":
 		StudySessionService.finish_early()
 	if BlockSessionService.session_kind == "bookmark":
 		BlockSessionService.finish_block()
@@ -2165,7 +2166,7 @@ func _set_timer_display(total_seconds: int) -> void:
 func _is_session_timer_visible() -> bool:
 	if BlockSessionService.session_kind == "core" or BlockSessionService.session_kind == "simulation":
 		return true
-	if str(StudySessionService.progress.get("goalType", "")) == "duration":
+	if FeatureFlags.progression_enabled() and str(StudySessionService.progress.get("goalType", "")) == "duration":
 		return true
 	return BlockSessionService.mode == "Timed"
 
diff --git a/scripts/ui/review_queue_results.gd b/scripts/ui/review_queue_results.gd
index 5533651..afe830a 100644
--- a/scripts/ui/review_queue_results.gd
+++ b/scripts/ui/review_queue_results.gd
@@ -1,6 +1,7 @@
 extends VBoxContainer
 
 const Brand := preload("res://scripts/ui/medmind_style.gd")
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
 
 var main: Control
 var title_label: Label
@@ -84,6 +85,9 @@ func _start_another() -> void:
 	another_button.disabled = true
 	status_label.text = "Preparing another review pass..."
 	status_label.visible = true
+	if not FeatureFlags.progression_enabled():
+		ReviewQueueService.start_pass("", 20)
+		return
 	if not StudySessionService.session_started.is_connected(_on_review_session_started):
 		StudySessionService.session_started.connect(_on_review_session_started)
 	if not StudySessionService.session_failed.is_connected(_on_review_session_failed):
diff --git a/tests/dashboard_metric_ui_test.gd b/tests/dashboard_metric_ui_test.gd
index 4cab4f0..39616e5 100644
--- a/tests/dashboard_metric_ui_test.gd
+++ b/tests/dashboard_metric_ui_test.gd
@@ -8,6 +8,8 @@ func _initialize() -> void:
 
 
 func _run() -> void:
+	var prior_environment: String = ProjectSettings.get_setting("step3/deployment_environment", "development")
+	ProjectSettings.set_setting("step3/deployment_environment", "uat")
 	var dashboard_service = root.get_node("DashboardService")
 	var mission_service = root.get_node("DailyMissionService")
 	var weekly_goal_service = root.get_node("WeeklyGoalService")
@@ -51,9 +53,25 @@ func _run() -> void:
 	_assert(dashboard.trend_chart.points.size() == 30, "chart should retain all 30 calendar points")
 
 	dashboard.queue_free()
+	await process_frame
+
+	ProjectSettings.set_setting("step3/deployment_environment", "prd")
+	var production_dashboard = load("res://scripts/ui/dashboard_screen.gd").new()
+	production_dashboard.size = Vector2(1280, 900)
+	root.add_child(production_dashboard)
+	await process_frame
+	production_dashboard._render()
+	await process_frame
+	_assert(production_dashboard.mission_content == null, "production should omit daily mission UI")
+	_assert(production_dashboard.weekly_goal_content == null, "production should omit weekly goal UI")
+	_assert(production_dashboard.rank_content == null, "production should omit clinical progression UI")
+	_assert(production_dashboard.mastery_rows.is_empty(), "production should render legacy system performance instead of mastery actions")
+	_assert(production_dashboard.system_list.get_child_count() == 14, "production should retain the system performance breakdown")
+	production_dashboard.queue_free()
 	dashboard_service.data = prior_data
 	mission_service.state = prior_missions
 	weekly_goal_service.state = prior_weekly_goal
+	ProjectSettings.set_setting("step3/deployment_environment", prior_environment)
 	await process_frame
 	quit(1 if failures > 0 else 0)
 
diff --git a/tests/post_answer_review_test.gd b/tests/post_answer_review_test.gd
index 40e6b79..7a01629 100644
--- a/tests/post_answer_review_test.gd
+++ b/tests/post_answer_review_test.gd
@@ -206,7 +206,7 @@ func _test_resolved_followup_stays_expanded_and_toggles() -> void:
 	_assert(content.find_child("FollowupOption_A", true, false) != null, "the resolved follow-up should retain its selected option")
 	_assert(content.find_child("FollowupOption_B", true, false) != null, "the resolved follow-up should retain its correct option")
 	var verdict := content.find_child("FollowupVerdict", true, false) as Label
-	_assert(verdict != null and verdict.text == "Incorrect", "the resolved follow-up should show whether the answer was correct")
+	_assert(verdict != null and verdict.text.is_empty(), "an incorrect follow-up should rely on its red answer treatment instead of redundant verdict text")
 	if toggle != null:
 		toggle.pressed.emit()
 	_assert(bool(player.followup_states["B"].get("collapsed", false)), "the minimize toggle should collapse the follow-up")
@@ -297,10 +297,8 @@ func _test_review_followup_is_optional_and_single_attempt() -> void:
 	player.review_followups_section.add_child(player.review_followups_content)
 	player._render_review_followups()
 	_assert(not player.next_button.disabled, "optional review follow-ups must not lock Next")
-	player._answer_review_followup(0, "B")
-	_assert(bool(player.review_followup_states[0].get("answered", false)), "a review follow-up should record its first response")
-	player._answer_review_followup(0, "A")
-	_assert(player.review_followup_states[0].get("selected_choice_id", "") == "B", "review follow-ups should accept only one attempt")
+	_assert(not player.review_followups_section.visible, "generic post-answer review follow-ups should remain retired")
+	_assert(player.review_followup_states.is_empty(), "retired generic follow-ups should not create answer state")
 	player.review_followups_section.free()
 	player.next_button.free()
 	player.free()
diff --git a/tests/progression_feature_flag_test.gd b/tests/progression_feature_flag_test.gd
new file mode 100644
index 0000000..1f88fea
--- /dev/null
+++ b/tests/progression_feature_flag_test.gd
@@ -0,0 +1,104 @@
+extends SceneTree
+
+const FeatureFlags := preload("res://scripts/config/feature_flags.gd")
+
+var failures := 0
+
+
+class ScreenHost extends Control:
+	var shown_screen := ""
+
+	func show_screen(screen_name: String, _payload: Variant = null) -> void:
+		shown_screen = screen_name
+
+
+func _initialize() -> void:
+	call_deferred("_run")
+
+
+func _run() -> void:
+	var prior_environment: String = ProjectSettings.get_setting("step3/deployment_environment", "development")
+	ProjectSettings.set_setting("step3/deployment_environment", "uat")
+	_assert(FeatureFlags.progression_enabled(), "UAT should enable progression")
+
+	for environment in ["prd", "production", "development", "unknown"]:
+		ProjectSettings.set_setting("step3/deployment_environment", environment)
+		_assert(not FeatureFlags.progression_enabled(), "%s should not enable progression" % environment)
+
+	ProjectSettings.set_setting("step3/deployment_environment", "prd")
+	var received: Array = []
+	var credits = root.get_node("CreditsService")
+	var prior_credits: int = credits.credits
+	var prior_loaded: bool = credits.loaded
+	var capture := func(amount: int, reason: String): received.append([amount, reason])
+	credits.award_received.connect(capture)
+	credits.apply_award_response({"credits": {"credits": 123}, "creditAwards": [{
+		"amount": 10, "reasonCode": "rank_promotion", "description": "Advanced rank"
+	}]})
+	_assert(received.is_empty(), "production should suppress progression award notifications")
+	_assert(credits.credits == 123, "production should still apply balances containing progression awards")
+	credits.apply_award_response({"creditAwards": [{
+		"amount": 2, "reasonCode": "qbank_difficult_correct", "description": "Difficult question correct"
+	}]})
+	_assert(received.size() == 1, "production should retain ordinary learning reward notifications")
+	credits.award_received.disconnect(capture)
+	credits.credits = prior_credits
+	credits.loaded = prior_loaded
+
+	var production_setup = load("res://scripts/ui/block_setup.gd").new()
+	var screen_host := ScreenHost.new()
+	root.add_child(screen_host)
+	production_setup.main = screen_host
+	root.add_child(production_setup)
+	await process_frame
+	_assert(not production_setup.goal_row.visible, "production block setup should hide progression finish lines")
+	var question_bank = root.get_node("QuestionBankService")
+	var prior_questions: Array = question_bank.questions.duplicate(true)
+	question_bank.questions = [_sample_question()]
+	production_setup.selected_system = "All Systems"
+	production_setup.size_spin.value = 5
+	production_setup._start_block()
+	_assert(screen_host.shown_screen == "player", "production should launch a classic block directly")
+	_assert(root.get_node("StudySessionService").active_session_id.is_empty(), "production classic blocks should not create progression sessions")
+	root.get_node("BlockSessionService").finish_block()
+	question_bank.questions = prior_questions
+	production_setup.queue_free()
+	screen_host.queue_free()
+
+	var production_profile = load("res://scripts/ui/progress_profile.gd").new()
+	root.add_child(production_profile)
+	await process_frame
+	_assert(production_profile.progression_content == null, "production profile should omit clinical progression")
+	production_profile.queue_free()
+
+	ProjectSettings.set_setting("step3/deployment_environment", "uat")
+	var uat_setup = load("res://scripts/ui/block_setup.gd").new()
+	root.add_child(uat_setup)
+	await process_frame
+	_assert(uat_setup.goal_row.visible, "UAT block setup should retain progression finish lines")
+	uat_setup.queue_free()
+
+	ProjectSettings.set_setting("step3/deployment_environment", prior_environment)
+	await process_frame
+	quit(1 if failures > 0 else 0)
+
+
+func _sample_question() -> Dictionary:
+	var choices: Array = []
+	for index in 5:
+		choices.append({"id": String.chr(65 + index), "text": "Choice %d" % index})
+	return {
+		"external_id": "progression-flag-test",
+		"system": "Cardiovascular",
+		"stem": "Test stem",
+		"lead_in": "Choose an answer.",
+		"choices": choices,
+		"correct_choice_id": "A",
+	}
+
+
+func _assert(condition: bool, message: String) -> void:
+	if condition:
+		return
+	failures += 1
+	push_error(message)
diff --git a/tests/progression_feature_flag_test.gd.uid b/tests/progression_feature_flag_test.gd.uid
new file mode 100644
index 0000000..24b14f6
--- /dev/null
+++ b/tests/progression_feature_flag_test.gd.uid
@@ -0,0 +1 @@
+uid://cl00e10sgfqei