diff --git a/init.lua b/init.lua
index 3b942f8..e5b2c0e 100644
--- a/init.lua
+++ b/init.lua
@@ -1,11 +1,11 @@
 -- lib-core.input-test — P.3.3 test-module
--- Validates engine.input mouse surface + lib-core.input v0.3.0 BIND_MAP refactor.
--- Headless via P.3.1 test-mode pattern. 13 assertions.
+-- Validates engine.input mouse surface + lib-core.input v0.4.0 (BIND_MAP + was_action_released).
+-- Headless via P.3.1 test-mode pattern. 17 assertions.
 
 local input = require("lib-core.input")
 
 function init(ctx)
-    -- Engine surface present (5 assertions)
+    -- Engine surface present (7 assertions)
     engine.test.assert(type(engine.input.MOUSE_LEFT)   == "number",
                        "MOUSE_LEFT constant is integer")
     engine.test.assert(type(engine.input.MOUSE_RIGHT)  == "number",
@@ -16,6 +16,10 @@ function init(ctx)
                        "is_mouse_down function registered")
     engine.test.assert(type(engine.input.was_mouse_pressed) == "function",
                        "was_mouse_pressed function registered")
+    engine.test.assert(type(engine.input.was_released)       == "function",
+                       "was_released function registered")
+    engine.test.assert(type(engine.input.was_mouse_released) == "function",
+                       "was_mouse_released function registered")
 
     -- bind() accepts mouse-strings (1 assertion)
     input.bind("click", {"mouse_left"})
@@ -33,11 +37,15 @@ function init(ctx)
     engine.test.equals(input.action_count(), 2,
                        "no partial state mutation on failed bind")
 
-    -- is_action_down returns false in headless (no actual press) (2 assertions)
+    -- is_action_down / was_action_pressed / was_action_released return false in headless (4 assertions)
     engine.test.equals(input.is_action_down("click"), false,
                        "headless: unpressed mouse_left is_action_down=false")
     engine.test.equals(input.was_action_pressed("click"), false,
                        "headless: unpressed was_action_pressed=false")
+    engine.test.equals(input.was_action_released("click"), false,
+                       "headless: unpressed was_action_released=false")
+    engine.test.equals(input.was_action_released("nonexistent_action"), false,
+                       "was_action_released for unknown action returns false")
 
     -- Existing key-only binding still works (regression-check) (1 assertion)
     input.bind("walk_left", {"a", "left"})
diff --git a/manifest.module b/manifest.module
index e59b4fb..6a0bffa 100644
--- a/manifest.module
+++ b/manifest.module
@@ -5,6 +5,6 @@
     "api": "^0.1",
     "entry_point": "init.lua",
     "deps": [
-        {"id": "lib-core.input", "version": "0.3.0"}
+        {"id": "lib-core.input", "version": "0.4.0"}
     ]
 }