diff --git a/docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md b/docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md
index 01f1d1d..ef38de1 100644
--- a/docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md
+++ b/docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md
@@ -79,7 +79,11 @@ Each catalog file has top-level **`schemaVersion`**, a **`perks`** map (`perkId`
 
 ## NEO-47 handoff (perk unlock engine + PerkState persistence)
 
-**Landed ([NEO-47](https://linear.app/neon-sprawl/issue/NEO-47)):** `IPlayerPerkStateStore` (in-memory + Postgres **`V004`**) persists branch picks and unlocked `perkId`s. **`PerkUnlockEngine`** evaluates tier-1 explicit branch picks and **path-auto** tier-2 unlocks from the tier-1 `branchId` when skill level meets gates (no second pick at tier 2 for prototype salvage). Level-up re-evaluation runs inside **`SkillProgressionGrantOperations`** after XP grants (HTTP POST, gather interact, mission/refine helpers). Stable deny **`reasonCode`** values for invalid picks. Internal **`PerkUnlockEvent`** returned from engine methods (telemetry in **NEO-49**). **HTTP read/write** for perk state is **NEO-48**.
+**Landed ([NEO-47](https://linear.app/neon-sprawl/issue/NEO-47)):** `IPlayerPerkStateStore` (in-memory + Postgres **`V004`**) persists branch picks and unlocked `perkId`s. **`PerkUnlockEngine`** evaluates tier-1 explicit branch picks and **path-auto** tier-2 unlocks from the tier-1 `branchId` when skill level meets gates (no second pick at tier 2 for prototype salvage). Level-up re-evaluation runs inside **`SkillProgressionGrantOperations`** after XP grants (HTTP POST, gather interact, mission/refine helpers). Stable deny **`reasonCode`** values for invalid picks. Internal **`PerkUnlockEvent`** returned from engine methods. **HTTP read/write** for perk state is **NEO-48**.
+
+## NEO-49 handoff (perk_unlock telemetry hook sites)
+
+**Landed ([NEO-49](https://linear.app/neon-sprawl/issue/NEO-49)):** Comment-only **`perk_unlock`** hook site in **`PerkUnlockEngine.TryUnlockPerks`** (authoritative unlock anchor; covers branch-pick and level-up path-auto). **`TODO(E9.M1)`**; no production ingest. [server README — Perk unlock engine and telemetry hooks](../../../server/README.md#perk-unlock-engine-and-telemetry-hooks-neo-47-neo-49); plan [NEO-49](../../plans/NEO-49-implementation-plan.md); manual QA [`NEO-49.md`](../../manual-qa/NEO-49.md).
 
 ## Prototype Slice 4 freeze — salvage flagship ([NEO-45](https://linear.app/neon-sprawl/issue/NEO-45))
 
@@ -138,7 +142,7 @@ Module-level bullets below span **NEO-45 → NEO-49**. **[NEO-45](https://linear
 
 - **Risk:** Mastery feels mandatory for one skill and blocks alts — **Mitigation:** flagship is one skill; other prototype skills remain level-only until expanded.
 - **Risk:** Branch picks without respec frustrate players — **Mitigation:** defer respec to late-stage tuning; keep v1 tree small.
-- **Telemetry:** `perk_unlock` hook sites ([NEO-49](https://linear.app/neon-sprawl/issue/NEO-49)); align with [E9.M1](E9_M1_TelemetryEventSchema.md) when catalog exists.
+- **Telemetry:** **`perk_unlock`** hook site in **`PerkUnlockEngine.TryUnlockPerks`** ([NEO-49](https://linear.app/neon-sprawl/issue/NEO-49) — comments-only); E9.M1 catalog ingest deferred.
 
 ## Source anchors
 
diff --git a/docs/decomposition/modules/documentation_and_implementation_alignment.md b/docs/decomposition/modules/documentation_and_implementation_alignment.md
index 3489596..74acafc 100644
--- a/docs/decomposition/modules/documentation_and_implementation_alignment.md
+++ b/docs/decomposition/modules/documentation_and_implementation_alignment.md
@@ -51,7 +51,7 @@ Rows appear when work starts; default for unlisted modules is **Planned** / not
 | E1.M3 | In Progress | **NEO-23 landed:** JSON v1 targeting read + select (`GET`/`POST …/target`, `Game/Targeting/`, [NEO-23](../../plans/NEO-23-implementation-plan.md)) — `PlayerTargetStateResponse` / soft lock / `reasonCode` denials; wire name differs from illustrative **`TargetState`** in module doc (called out in plan + README). **NEO-24 landed:** client tab-target + lock HUD synced to server ([NEO-24](../../plans/NEO-24-implementation-plan.md)) — `TargetSelectionClient` ([`client/scripts/target_selection_client.gd`](../../../client/scripts/target_selection_client.gd)), Tab / Esc bindings, `TargetLockLabel` HUD, hybrid movement-triggered refresh via new `PositionAuthorityClient.authoritative_ack` signal (fires on every server-confirmed position, boot + `move-stream` 200) with a 250 ms cooldown; manual QA in [`docs/manual-qa/NEO-24.md`](../../manual-qa/NEO-24.md). **NEO-25 landed:** versioned **`GET /game/world/interactables`** ([NEO-25](../../plans/NEO-25-implementation-plan.md)) — `InteractablesListResponse` / `InteractablesWorldApi` in `server/NeonSprawl.Server/Game/Interaction/`; Godot `interactables_catalog_client.gd` + `interactable_world_builder.gd` (fetch-driven props + glow); [server README — Interactable descriptors (NEO-25)](../../../server/README.md#interactable-descriptors-neo-25). **NEO-26 landed:** prototype **`SelectionEvent`** — **`TargetSelectionClient.selection_event`** ([NEO-26](../../plans/NEO-26-implementation-plan.md)) when **`lockedTargetId`** changes; optional **`log_selection_events`**. **NEO-27 landed:** Slice 3 telemetry hook sites documented — `selection_event` maps to product `target_changed` in `target_selection_client.gd`; server lock transition hook comments in `InMemoryPlayerTargetLockStore`; reserved `ability_cast_requested` / `ability_cast_denied` comments in `client/scripts/main.gd` (all TODO(E9.M1)); see [NEO-27](../../plans/NEO-27-implementation-plan.md) and [`docs/manual-qa/NEO-27.md`](../../manual-qa/NEO-27.md). **Follow-on / still open:** richer **`InteractableDescriptor`** consumers beyond list projection + existing `POST …/interact`; production telemetry ingest/catalog after E9.M1. **Precursor (E1.M1):** [NEO-9](../../plans/NEO-9-implementation-plan.md) `POST …/interact`. | Linear [NEO-24](https://linear.app/neon-sprawl/issue/NEO-24)–[NEO-27](https://linear.app/neon-sprawl/issue/NEO-27); [E1_M3_InteractionAndTargetingLayer.md](E1_M3_InteractionAndTargetingLayer.md); [E1M3 prototype backlog](../../plans/E1M3-prototype-backlog.md); [server README — Targeting](../../../server/README.md#targeting-neo-23), [Interactable descriptors (NEO-25)](../../../server/README.md#interactable-descriptors-neo-25), [Interaction](../../../server/README.md#interaction-neo-9) |
 | E1.M4 | In Progress | **NEO-29 landed:** prototype `HotbarLoadout` v1 server contract (`GET`/`POST /game/players/{id}/hotbar-loadout`) with stable deny reason codes, per-player scope, and persistence policy matching NEO-8/NS-17 (Postgres when configured, in-memory fallback otherwise). Client boot hydration is wired via `hotbar_loadout_client.gd` + `hotbar_state.gd` from `main.gd`; manual QA checklist created. **NEO-31 landed:** prototype **`POST /game/players/{id}/ability-cast`**, digit-key cast wiring from `main.gd`, `ability_cast_client.gd`, and `hotbar_cast_slot_resolver.gd` (target id from `lockedTargetId` in cached target state); GdUnit covers resolver + HTTP client; manual QA [NEO-31](../../manual-qa/NEO-31.md). **NEO-28 landed:** cast POST validates **lock + registry + range** (`invalid_target`, `out_of_range`); **`AbilityCastClient.cast_result_received`** + **`CastFeedbackLabel`** HUD line; manual QA [NEO-28](../../manual-qa/NEO-28.md). **NEO-30 landed:** Slice 3 cast funnel telemetry **hook-site comments** in [`AbilityCastApi.cs`](../../../server/NeonSprawl.Server/Game/AbilityInput/AbilityCastApi.cs) (`ability_cast_requested` on authoritative accept, `ability_cast_denied` + non-empty `reasonCode` on each JSON deny branch); client dev hooks unchanged; manual QA [NEO-30](../../manual-qa/NEO-30.md); plan [NEO-30](../../plans/NEO-30-implementation-plan.md). **NEO-32 landed:** `GET /game/players/{id}/cooldown-snapshot` + `on_cooldown` cast deny + prototype global cooldown commit; [`cooldown_snapshot_client.gd`](../../../client/scripts/cooldown_snapshot_client.gd), [`cooldown_state.gd`](../../../client/scripts/cooldown_state.gd), **`CooldownSlotsLabel`** in [`main.gd`](../../../client/scripts/main.gd); manual QA [NEO-32](../../manual-qa/NEO-32.md); plan [NEO-32](../../plans/NEO-32-implementation-plan.md). | [NEO-29](../../plans/NEO-29-implementation-plan.md), [NEO-31](../../plans/NEO-31-implementation-plan.md), [NEO-28](../../plans/NEO-28-implementation-plan.md), [NEO-30](../../plans/NEO-30-implementation-plan.md), [NEO-32](../../plans/NEO-32-implementation-plan.md); [E1_M4_AbilityInputScaffold.md](E1_M4_AbilityInputScaffold.md); [E1M4 prototype backlog](../../plans/E1M4-prototype-backlog.md); `server/NeonSprawl.Server/Game/AbilityInput/`; [`client/scripts/hotbar_loadout_client.gd`](../../../client/scripts/hotbar_loadout_client.gd), [`client/scripts/hotbar_state.gd`](../../../client/scripts/hotbar_state.gd), [`client/scripts/ability_cast_client.gd`](../../../client/scripts/ability_cast_client.gd), [`client/scripts/hotbar_cast_slot_resolver.gd`](../../../client/scripts/hotbar_cast_slot_resolver.gd), [`client/scripts/cooldown_snapshot_client.gd`](../../../client/scripts/cooldown_snapshot_client.gd), [`client/scripts/cooldown_state.gd`](../../../client/scripts/cooldown_state.gd); [server README — Hotbar loadout](../../../server/README.md#hotbar-loadout-neo-29), [Ability cast (NEO-31)](../../../server/README.md#ability-cast-neo-31), [Cooldown snapshot (NEO-32)](../../../server/README.md#cooldown-snapshot-neo-32) |
 | E2.M1 | In Progress | **NEO-33 landed:** frozen prototype trio **`salvage`** / **`refine`** / **`intrusion`** in [`content/skills/prototype_skills.json`](../../../content/skills/prototype_skills.json); PR gate + [`validate_content.py`](../../../scripts/validate_content.py) enforce schema, duplicate `id`, exact trio ids, and category coverage; designer note on **`allowedXpSourceKinds`** in [E2_M1](E2_M1_SkillDefinitionRegistry.md) + [`content/README.md`](../../../content/README.md). **NEO-34 landed:** fail-fast server load of `content/skills/*.json` at startup — `server/NeonSprawl.Server/Game/Skills/` ([NEO-34](../../plans/NEO-34-implementation-plan.md)); config + discovery in [server README — Skill catalog](../../../server/README.md#skill-catalog-contentskills-neo-34). **NEO-35 landed:** `ISkillDefinitionRegistry` / `SkillDefinitionRegistry` + DI ([NEO-35](../../plans/NEO-35-implementation-plan.md)). **NEO-36 landed:** versioned **`GET /game/world/skill-definitions`** ([NEO-36](../../plans/NEO-36-implementation-plan.md)) — `SkillDefinitionsWorldApi` + `SkillDefinitionsListDtos` in `server/NeonSprawl.Server/Game/Skills/`; Bruno `bruno/neon-sprawl-server/skill-definitions/`; manual QA [`NEO-36`](../../manual-qa/NEO-36.md). **E2.M2 consumer (NEO-38 landed):** grant path validates `skillId` + `sourceKind` vs catalog **`allowedXpSourceKinds`** on **`POST …/skill-progression`** ([NEO-38](../../plans/NEO-38-implementation-plan.md)); see [server README — Skill progression grant](../../../server/README.md#skill-progression-grant-neo-38) and [E2_M2](E2_M2_XpAwardAndLevelEngine.md). | [NEO-33](../../plans/NEO-33-implementation-plan.md), [NEO-34](../../plans/NEO-34-implementation-plan.md), [NEO-35](../../plans/NEO-35-implementation-plan.md), [NEO-36](../../plans/NEO-36-implementation-plan.md); [E2_M1](E2_M1_SkillDefinitionRegistry.md); [module_dependency_register.md](module_dependency_register.md) **E2.M1 note**; `server/NeonSprawl.Server/Game/Skills/`; [`docs/manual-qa/NEO-36.md`](../../manual-qa/NEO-36.md); [server README — Skill definitions (NEO-36)](../../../server/README.md#skill-definitions-neo-36) |
-| E2.M3 | In Progress | **NEO-45 landed:** prototype **`salvage`** mastery catalog + CI gates (see [NEO-45 plan](../../plans/NEO-45-implementation-plan.md)). **NEO-46 landed:** fail-fast server load under `server/NeonSprawl.Server/Game/Mastery/` — `MasteryCatalogLoader`, `IMasteryCatalogRegistry`, cross-check vs `ISkillDefinitionRegistry`, Slice 4 + **`tierIndex`** 1..N gate; see [NEO-46 plan](../../plans/NEO-46-implementation-plan.md). **NEO-47 landed:** `PerkUnlockEngine`, `IPlayerPerkStateStore` + **`V004`**, level-up hook in skill XP grants; see [NEO-47 plan](../../plans/NEO-47-implementation-plan.md). **Still planned:** perk HTTP + Bruno ([NEO-48](https://linear.app/neon-sprawl/issue/NEO-48)), telemetry hooks ([NEO-49](https://linear.app/neon-sprawl/issue/NEO-49)). | [NEO-45](../../plans/NEO-45-implementation-plan.md), [NEO-46](../../plans/NEO-46-implementation-plan.md), [NEO-47](../../plans/NEO-47-implementation-plan.md), [E2M3-pre-production-backlog](../../plans/E2M3-pre-production-backlog.md), [E2_M3](E2_M3_MasteryAndPerkUnlocks.md) |
+| E2.M3 | In Progress | **NEO-45 landed:** prototype **`salvage`** mastery catalog + CI gates (see [NEO-45 plan](../../plans/NEO-45-implementation-plan.md)). **NEO-46 landed:** fail-fast server load under `server/NeonSprawl.Server/Game/Mastery/` — `MasteryCatalogLoader`, `IMasteryCatalogRegistry`, cross-check vs `ISkillDefinitionRegistry`, Slice 4 + **`tierIndex`** 1..N gate; see [NEO-46 plan](../../plans/NEO-46-implementation-plan.md). **NEO-47 landed:** `PerkUnlockEngine`, `IPlayerPerkStateStore` + **`V004`**, level-up hook in skill XP grants; see [NEO-47 plan](../../plans/NEO-47-implementation-plan.md). **NEO-49 landed:** comment-only **`perk_unlock`** telemetry hook site in [`PerkUnlockEngine.TryUnlockPerks`](../../../server/NeonSprawl.Server/Game/Mastery/PerkUnlockEngine.cs) ([NEO-49 plan](../../plans/NEO-49-implementation-plan.md), [`NEO-49` manual QA](../../manual-qa/NEO-49.md)); [server README — Perk unlock telemetry (NEO-49)](../../../server/README.md#perk-unlock-engine-and-telemetry-hooks-neo-47-neo-49). **Still planned:** perk HTTP + Bruno ([NEO-48](https://linear.app/neon-sprawl/issue/NEO-48)). | [NEO-45](../../plans/NEO-45-implementation-plan.md), [NEO-46](../../plans/NEO-46-implementation-plan.md), [NEO-47](../../plans/NEO-47-implementation-plan.md), [NEO-49](../../plans/NEO-49-implementation-plan.md), [E2M3-pre-production-backlog](../../plans/E2M3-pre-production-backlog.md), [E2_M3](E2_M3_MasteryAndPerkUnlocks.md) |
 | E2.M2 | In Progress | **NEO-37 landed:** versioned **`GET /game/players/{id}/skill-progression`** ([NEO-37](../../plans/NEO-37-implementation-plan.md)) — read model for every registered skill; known-player gate via `IPositionStateStore`; [server README — Skill progression snapshot (NEO-37)](../../../server/README.md#skill-progression-snapshot-neo-37); manual QA [`NEO-37`](../../manual-qa/NEO-37.md). **NEO-38 landed:** **`POST`** same path — grant apply, persistence (`IPlayerSkillProgressionStore`, `V003` migration), structured denies + **`levelUps`** ([NEO-38](../../plans/NEO-38-implementation-plan.md)); manual QA [`NEO-38`](../../manual-qa/NEO-38.md); Bruno `bruno/neon-sprawl-server/skill-progression/`; [server README — Skill progression grant (NEO-38)](../../../server/README.md#skill-progression-grant-neo-38). **NEO-39 landed:** data-driven `LevelCurve` content + schema + CI validation (`*_level_curve.json`) with fail-fast startup schema checks; progression GET/POST level resolution now uses `ISkillLevelCurve` content-backed thresholds ([NEO-39](../../plans/NEO-39-implementation-plan.md)); manual QA [`NEO-39`](../../manual-qa/NEO-39.md). **NEO-40 landed:** comment-only telemetry hook sites in [`SkillProgressionSnapshotApi.cs`](../../../server/NeonSprawl.Server/Game/Skills/SkillProgressionSnapshotApi.cs) on **`POST …/skill-progression`** for future **`xp_grant`** / **`level_up`** ([NEO-40](../../plans/NEO-40-implementation-plan.md), [`NEO-40` manual QA](../../manual-qa/NEO-40.md)). **NEO-41 landed:** gather prototype — **`POST …/interact`** with **`kind: resource_node`** grants **`salvage`** + **`activity`** (10 XP) via [`SkillProgressionGrantOperations`](../../../server/NeonSprawl.Server/Game/Skills/SkillProgressionGrantOperations.cs) ([NEO-41](../../plans/NEO-41-implementation-plan.md), [`NEO-41` manual QA](../../manual-qa/NEO-41.md)); [server README — Interaction](../../../server/README.md#interaction-neo-9). **NEO-42 landed (prep):** **`RefineActivitySkillXpGrant`** / **`RefineSkillXpConstants`** + deny-registry factory + tests — same NEO-38 grant stack; **E3.M2** must invoke on craft/refine success ([NEO-42](../../plans/NEO-42-implementation-plan.md), [`NEO-42` manual QA](../../manual-qa/NEO-42.md)); [server README — Craft / refine hook (NEO-42)](../../../server/README.md#craft--refine-hook--skill-xp-neo-42). **NEO-43 landed (prep):** **`MissionRewardSkillXpGrant`** / **`MissionRewardSkillXpConstants`** + deny-registry factory + tests — same NEO-38 grant stack with fixed **`sourceKind: mission_reward`**; **E7.M2** must invoke from quest hand-in ([NEO-43](../../plans/NEO-43-implementation-plan.md), [`NEO-43` manual QA](../../manual-qa/NEO-43.md)); [server README — Mission / quest reward (NEO-43)](../../../server/README.md#mission--quest-reward--skill-xp-neo-43). **Slice 3 still open:** [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44). See [epic_02 — E2.M2 + Slice 3](../epics/epic_02_skills_and_progression.md). | [NEO-37](../../plans/NEO-37-implementation-plan.md), [NEO-38](../../plans/NEO-38-implementation-plan.md), [NEO-39](../../plans/NEO-39-implementation-plan.md), [NEO-40](../../plans/NEO-40-implementation-plan.md), [NEO-41](../../plans/NEO-41-implementation-plan.md), [NEO-42](../../plans/NEO-42-implementation-plan.md), [NEO-43](../../plans/NEO-43-implementation-plan.md), [E2_M2](E2_M2_XpAwardAndLevelEngine.md); label **`E2.M2`** on NEO-37–NEO-41, NEO-42–NEO-44 |
 | E3.M1 | In Progress | **NEO-41 landed (prototype):** `POST …/interact` success on **`resource_node`** (`prototype_resource_node_alpha`) applies **`salvage`** skill XP (**`sourceKind: activity`**, 10 XP) via shared NEO-38 grant operations. **Still planned:** `GatherResult`, yields, inventory per [E3_M1](E3_M1_ResourceNodeAndGatherLoop.md). | [NEO-41](../../plans/NEO-41-implementation-plan.md), [E3_M1](E3_M1_ResourceNodeAndGatherLoop.md); `server/NeonSprawl.Server/Game/Interaction/`, `Game/Skills/` |
 
diff --git a/docs/manual-qa/NEO-49.md b/docs/manual-qa/NEO-49.md
new file mode 100644
index 0000000..308391b
--- /dev/null
+++ b/docs/manual-qa/NEO-49.md
@@ -0,0 +1,24 @@
+# Manual QA — NEO-49 (perk_unlock telemetry hook sites)
+
+Reference: [implementation plan](../plans/NEO-49-implementation-plan.md), [NEO-47 implementation plan](../plans/NEO-47-implementation-plan.md) (unlock engine).
+
+## Preconditions
+
+- Run `NeonSprawl.Server` (`dotnet run` from `server/NeonSprawl.Server`; default `http://localhost:5253`).
+- This story adds **comments only**; perk unlock behavior matches NEO-47.
+
+## Code review check
+
+- [ ] Open `server/NeonSprawl.Server/Game/Mastery/PerkUnlockEngine.cs` and locate **`TryUnlockPerks`**. Confirm a **comment block** marks the future E9.M1 event **`perk_unlock`** after `PerkUnlockEvent` instances are built.
+- [ ] Confirm **`TODO(E9.M1)`** and planned payload fields: `playerId`, `perkId`, `skillId`, `tierIndex`, `branchId`, `source` (`BranchPick` | `LevelUp`).
+- [ ] Confirm there are **no** new `ILogger` or metrics calls for this event.
+- [ ] Open `PerkUnlockEvent.cs` — summary cross-references the hook anchor in `TryUnlockPerks`.
+- [ ] Open [server README — Perk unlock engine and telemetry hooks](../../server/README.md#perk-unlock-engine-and-telemetry-hooks-neo-47-neo-49) — NEO-49 hook placement documented.
+
+## Regression (optional)
+
+```bash
+cd server && dotnet test NeonSprawl.sln --no-restore 2>/dev/null || dotnet test NeonSprawl.sln
+```
+
+Expect all tests pass (comments-only change).
diff --git a/docs/plans/NEO-49-implementation-plan.md b/docs/plans/NEO-49-implementation-plan.md
index ec4e4d9..51cb019 100644
--- a/docs/plans/NEO-49-implementation-plan.md
+++ b/docs/plans/NEO-49-implementation-plan.md
@@ -38,9 +38,9 @@
 
 ## Acceptance criteria checklist
 
-- [ ] Hook location(s) in unlock / branch-select path documented in code comments.
-- [ ] `TODO(E9.M1)` alignment; no production logging calls.
-- [ ] Module doc + server README note hook placement.
+- [x] Hook location(s) in unlock / branch-select path documented in code comments.
+- [x] `TODO(E9.M1)` alignment; no production logging calls.
+- [x] Module doc + server README note hook placement.
 
 ## Technical approach
 
diff --git a/server/README.md b/server/README.md
index fdd64bd..3f5156f 100644
--- a/server/README.md
+++ b/server/README.md
@@ -50,6 +50,12 @@ After the skill catalog loads, the host loads every **`*_mastery.json`** under t
 
 On success, **Information** logs include the resolved mastery directory, track count, and perk count. Game code should use **`IMasteryCatalogRegistry`** for lookups (NEO-47+).
 
+## Perk unlock engine and telemetry hooks (NEO-47, NEO-49)
+
+**`PerkUnlockEngine`** (`Game/Mastery/`) is the authoritative server path for branch picks and perk unlocks: **`TrySelectBranch`**, **`ReevaluateAfterLevelUp`** (called from **`SkillProgressionGrantOperations`** on skill level-up). Persistence: **`IPlayerPerkStateStore`** + Flyway **`V004`** ([NEO-47 plan](../../docs/plans/NEO-47-implementation-plan.md)).
+
+**NEO-49:** comment-only **telemetry hook site** for future catalog event **`perk_unlock`** in **`PerkUnlockEngine.TryUnlockPerks`** when new perk ids are persisted (one emit per unlocked perk; **`TODO(E9.M1)`** — no production ingest). Manual QA: [`docs/manual-qa/NEO-49.md`](../../docs/manual-qa/NEO-49.md); plan: [NEO-49 implementation plan](../../docs/plans/NEO-49-implementation-plan.md).
+
 ## Skill definitions (NEO-36)
 
 **`GET /game/world/skill-definitions`** returns a versioned JSON body (`schemaVersion` **1**, **`skills`**) backed by **`ISkillDefinitionRegistry`** — the same prototype rows loaded at startup (no second source of truth). Plan: [NEO-36 implementation plan](../../docs/plans/NEO-36-implementation-plan.md); manual QA: [`docs/manual-qa/NEO-36.md`](../../docs/manual-qa/NEO-36.md); Bruno: `bruno/neon-sprawl-server/skill-definitions/`.