diff --git a/docs/plans/E7M1-prototype-backlog.md b/docs/plans/E7M1-prototype-backlog.md
index 85c4278..04aec38 100644
--- a/docs/plans/E7M1-prototype-backlog.md
+++ b/docs/plans/E7M1-prototype-backlog.md
@@ -128,13 +128,13 @@ Working backlog for **Epic 7 — Slice 1** ([quest core and persistence](../deco
 
 ### E7M1-03 — Injectable quest definition registry + DI
 
-**Goal:** **`IQuestDefinitionRegistry`** with **`TryGet`**, startup registration from E7M1-02 catalog.
+**Goal:** **`IQuestDefinitionRegistry`** with **`TryGetDefinition`**, **`TryNormalizeKnown`**, and **`GetDefinitionsInIdOrder`**, startup registration from E7M1-02 catalog.
 
 **In scope**
 
-- Interface + in-memory implementation; **`AddQuestDefinitionRegistry`** DI extension.
-- Unit tests: lookup known ids, unknown id returns false.
-- Wire in host startup alongside other content registries.
+- Interface + in-memory implementation; extend **`AddQuestDefinitionCatalog`** to register **`IQuestDefinitionRegistry`** after the catalog singleton.
+- Unit tests: lookup known ids; unknown / null / empty id returns false; normalize trim/case; enumeration order; host DI resolve.
+- Wire registry in **`AddQuestDefinitionCatalog`** alongside catalog load (catalog remains eager boot surface).
 
 **Out of scope**
 
diff --git a/docs/reviews/2026-06-01-NEO-114.md b/docs/reviews/2026-06-01-NEO-114.md
index 784cbe9..c4058cd 100644
--- a/docs/reviews/2026-06-01-NEO-114.md
+++ b/docs/reviews/2026-06-01-NEO-114.md
@@ -17,7 +17,7 @@ NEO-114 adds **`IQuestDefinitionRegistry`** and **`QuestDefinitionRegistry`**, a
 | Path | Result |
 |------|--------|
 | `docs/plans/NEO-114-implementation-plan.md` | **Matches** — kickoff decisions adopted; acceptance checklist checked; reconciliation accurate. |
-| `docs/plans/E7M1-prototype-backlog.md` (E7M1-03) | **Partially matches** — AC checked; **In scope** bullets still say `TryGet` and `AddQuestDefinitionRegistry` (kickoff chose `TryGetDefinition` and extend `AddQuestDefinitionCatalog`). |
+| `docs/plans/E7M1-prototype-backlog.md` (E7M1-03) | **Matches** — AC checked; **In scope** wording aligned with shipped API (NEO-114 review follow-up). |
 | `docs/decomposition/modules/E7_M1_QuestStateMachine.md` | **Matches** — Status notes E7M1-03 / NEO-114 registry landed; runtime from E7M1-04. |
 | `docs/decomposition/modules/documentation_and_implementation_alignment.md` | **Matches** — E7.M1 row notes NEO-114 registry; register stays Planned until E7M1-05+ runtime. |
 | `docs/decomposition/modules/module_dependency_register.md` | **Matches** — E7.M1 note updated for NEO-114 registry landed. |
@@ -30,9 +30,9 @@ NEO-114 adds **`IQuestDefinitionRegistry`** and **`QuestDefinitionRegistry`**, a
 
 ## Suggestions
 
-1. **Refresh E7M1-03 backlog wording** — Update `docs/plans/E7M1-prototype-backlog.md` **In scope** to match shipped API: `TryGetDefinition` (not `TryGet`), extend `AddQuestDefinitionCatalog` (not separate `AddQuestDefinitionRegistry`), and optional mention of `TryNormalizeKnown` / `GetDefinitionsInIdOrder` per the implementation plan.
+1. ~~**Refresh E7M1-03 backlog wording** — Update `docs/plans/E7M1-prototype-backlog.md` **In scope** to match shipped API: `TryGetDefinition` (not `TryGet`), extend `AddQuestDefinitionCatalog` (not separate `AddQuestDefinitionRegistry`), and optional mention of `TryNormalizeKnown` / `GetDefinitionsInIdOrder` per the implementation plan.~~ **Done.**
 
-2. **`TryGetDefinition` empty-string test** — Implementation plan test table lists false for null/unknown/**empty**; tests cover null and unknown but not `""`. Encounter registry has the same gap; adding one unit test would close the plan loop and guard accidental empty-key catalog entries.
+2. ~~**`TryGetDefinition` empty-string test** — Implementation plan test table lists false for null/unknown/**empty**; tests cover null and unknown but not `""`. Encounter registry has the same gap; adding one unit test would close the plan loop and guard accidental empty-key catalog entries.~~ **Done.** — `TryGetDefinition_ShouldReturnFalse_WhenQuestIdIsEmpty`.
 
 ## Nits
 
@@ -58,4 +58,4 @@ dotnet test NeonSprawl.Server.Tests/NeonSprawl.Server.Tests.csproj \
 dotnet test NeonSprawl.Server.Tests/NeonSprawl.Server.Tests.csproj
 ```
 
-**Reviewer note:** All 14 `QuestDefinitionRegistryTests` passed locally during review.
+**Reviewer note:** All 14 `QuestDefinitionRegistryTests` passed locally during review. After follow-up: 15 tests (empty-string `TryGetDefinition` case).
diff --git a/server/NeonSprawl.Server.Tests/Game/Quests/QuestDefinitionRegistryTests.cs b/server/NeonSprawl.Server.Tests/Game/Quests/QuestDefinitionRegistryTests.cs
index f67cf48..671f6f6 100644
--- a/server/NeonSprawl.Server.Tests/Game/Quests/QuestDefinitionRegistryTests.cs
+++ b/server/NeonSprawl.Server.Tests/Game/Quests/QuestDefinitionRegistryTests.cs
@@ -120,6 +120,22 @@ public class QuestDefinitionRegistryTests
         Assert.Null(def);
     }
 
+    [Fact]
+    public void TryGetDefinition_ShouldReturnFalse_WhenQuestIdIsEmpty()
+    {
+        // Arrange
+        var rows = new Dictionary<string, QuestDefRow>(StringComparer.Ordinal)
+        {
+            [GatherIntroId] = CreateGatherIntroRow(),
+        };
+        var registry = CreateRegistryFromRows(rows);
+        // Act
+        var found = registry.TryGetDefinition(string.Empty, out var def);
+        // Assert
+        Assert.False(found);
+        Assert.Null(def);
+    }
+
     [Fact]
     public void TryGetDefinition_ShouldReturnFalse_WhenIdUnknown()
     {