Merge pull request #110 from ViPro-Technologies/NEO-76-e5m1-prototype-backlog

NEO-76: E5M1-01 prototype AbilityDef catalog + schemas + CI
2026-05-24 21:31:13 -04:00 · 2026-05-24 21:31:13 -04:00 · 37b14f9fe3
parent 7d8bbc722f 866f962583
commit 37b14f9fe3
12 changed files with 785 additions and 3 deletions
--- a/content/README.md
+++ b/content/README.md
@ -9,6 +9,7 @@ Data-driven definitions (skills, items, recipes, quests) validated in CI with **
 | [`mastery/`](mastery/) | Mastery catalogs; each file matches [`schemas/mastery-catalog.schema.json`](schemas/mastery-catalog.schema.json) — **stable `branchId` / `perkId`**, tier gates via skill level ([E2.M3](../docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md)) |
 | [`items/`](items/) | Item catalogs; each row matches [`schemas/item-def.schema.json`](schemas/item-def.schema.json) — **stable `id`**, **`stackMax`**, **`inventorySlotKind`** for [E3.M3](../docs/decomposition/modules/E3_M3_ItemizationAndInventorySchema.md) |
 | [`recipes/`](recipes/) | Recipe catalogs; each row matches [`schemas/recipe-def.schema.json`](schemas/recipe-def.schema.json) — **stable `id`**, **`recipeKind`**, **`requiredSkillId`**, inputs/outputs for [E3.M2](../docs/decomposition/modules/E3_M2_RefinementAndRecipeExecution.md) |
+| [`abilities/`](abilities/) | Combat ability catalogs; each row matches [`schemas/ability-def.schema.json`](schemas/ability-def.schema.json) — **stable `id`**, **`baseDamage`**, **`cooldownSeconds`** for [E5.M1](../docs/decomposition/modules/E5_M1_CombatRulesEngine.md) |
 | [`resource-nodes/`](resource-nodes/) | Resource node + yield catalogs; node rows match [`schemas/resource-node-def.schema.json`](schemas/resource-node-def.schema.json), yield rows match [`schemas/resource-yield-row.schema.json`](schemas/resource-yield-row.schema.json) — **stable `nodeDefId`**, **`gatherLens`**, **`maxGathers`** for [E3.M1](../docs/decomposition/modules/E3_M1_ResourceNodeAndGatherLoop.md) |

 **Prototype Slice 1 (NEO-33):** CI expects **exactly three** skill rows with ids **`salvage`**, **`refine`**, **`intrusion`** (gather + process + tech). Each row must declare **`allowedXpSourceKinds`** (non-empty); see [E2.M1 — Designer note: `allowedXpSourceKinds`](../docs/decomposition/modules/E2_M1_SkillDefinitionRegistry.md#designer-note-allowedxpsourcekinds-and-grant-call-sites) for what each kind means for grant wiring.
@ -19,6 +20,8 @@ Data-driven definitions (skills, items, recipes, quests) validated in CI with **

 **Prototype Slice 3 — recipes (E3M2-01):** CI expects **exactly eight** recipe ids aligned to [E3.M2 recipe freeze](../docs/decomposition/modules/E3_M2_RefinementAndRecipeExecution.md#prototype-slice-3-freeze-e3m2-01) — at least one **`process`** and one **`make`** row; all **`requiredSkillId`** values **`refine`**; every input/output **`itemId`** from the frozen item catalog. **Do not rename** recipe `id` after ship. See [E3M2-prototype-backlog.md](../docs/plans/E3M2-prototype-backlog.md).

+**Prototype E5 Slice 1 — abilities (NEO-76):** CI expects **exactly four** ability ids aligned to [E5.M1 ability freeze](../docs/decomposition/modules/E5_M1_CombatRulesEngine.md#prototype-slice-1-freeze-e5m1-01) — **`prototype_pulse`**, **`prototype_guard`**, **`prototype_dash`**, **`prototype_burst`**. **Do not rename** ability `id` after ship—change **`displayName`** only. See [E5M1-prototype-backlog.md](../docs/plans/E5M1-prototype-backlog.md) and [NEO-76 plan](../docs/plans/NEO-76-implementation-plan.md).
+
 **Prototype Slice 4 (NEO-45):** CI expects **exactly one** `MasteryTrack` for **`salvage`** only (`refine` / `intrusion` have no mastery rows yet). Tier 1 @ skill level **2** is a **mutually exclusive** branch pick (`scrap_efficiency` vs `bulk_haul`) with **no** perks; tier 2 @ level **4** unlocks one perk per branch path. **Do not rename** `branchId` / `perkId` after ship—change `displayName` only. See [E2.M3 — Designer note](../docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md#designer-note-tiers-branches-and-level-gates) and [freeze table](../docs/decomposition/modules/E2_M3_MasteryAndPerkUnlocks.md#prototype-slice-4-freeze--salvage-flagship-neo-45).

 Server load path and hot-reload policy are TBD; keep files versioned here as the source of truth.
--- a/content/abilities/prototype_abilities.json
+++ b/content/abilities/prototype_abilities.json
@ -0,0 +1,33 @@
+{
+  "schemaVersion": 1,
+  "abilities": [
+    {
+      "id": "prototype_pulse",
+      "displayName": "Prototype Pulse",
+      "baseDamage": 25,
+      "cooldownSeconds": 3.0,
+      "abilityKind": "attack"
+    },
+    {
+      "id": "prototype_guard",
+      "displayName": "Prototype Guard",
+      "baseDamage": 0,
+      "cooldownSeconds": 6.0,
+      "abilityKind": "utility"
+    },
+    {
+      "id": "prototype_dash",
+      "displayName": "Prototype Dash",
+      "baseDamage": 0,
+      "cooldownSeconds": 4.0,
+      "abilityKind": "movement"
+    },
+    {
+      "id": "prototype_burst",
+      "displayName": "Prototype Burst",
+      "baseDamage": 40,
+      "cooldownSeconds": 5.0,
+      "abilityKind": "attack"
+    }
+  ]
+}
--- a/content/schemas/ability-def.schema.json
+++ b/content/schemas/ability-def.schema.json
@ -0,0 +1,36 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://neon-sprawl.local/schemas/ability-def.json",
+  "title": "AbilityDef",
+  "description": "Single combat ability row for catalogs (e.g. content/abilities/*_abilities.json). IDs are stable forever—rename display in displayName only. See docs/decomposition/modules/E5_M1_CombatRulesEngine.md.",
+  "type": "object",
+  "additionalProperties": false,
+  "required": ["id", "displayName", "baseDamage", "cooldownSeconds"],
+  "properties": {
+    "id": {
+      "type": "string",
+      "pattern": "^[a-z][a-z0-9_]*$",
+      "description": "Immutable ability key for hotbar bindings, cast requests, telemetry, and combat resolution. Never change after content ships; add a new id if the ability splits."
+    },
+    "displayName": {
+      "type": "string",
+      "minLength": 1,
+      "description": "Player-facing label; safe to change without migrating character data."
+    },
+    "baseDamage": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "Deterministic damage dealt on successful combat resolve in prototype Slice 1 (no miss/crit RNG)."
+    },
+    "cooldownSeconds": {
+      "type": "number",
+      "exclusiveMinimum": 0,
+      "description": "Per-ability cooldown duration applied on successful resolve once E5.M1 wires catalog timing."
+    },
+    "abilityKind": {
+      "type": "string",
+      "description": "Optional UX grouping for HUD and tooling (attack vs utility vs movement).",
+      "enum": ["attack", "utility", "movement"]
+    }
+  }
+}
--- a/docs/decomposition/epics/epic_05_pve_combat.md
+++ b/docs/decomposition/epics/epic_05_pve_combat.md
@ -54,6 +54,8 @@ Deliver tab-target combat resolution, NPC behaviors and telegraphs, encounter te
  - Combat readable in fixed isometric camera; no silent failures on ability deny.
 - Telemetry hooks: `encounter_start`, `ability_used`, `player_death`, `enemy_defeat`.

+**Linear backlog:** [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md) — [NEO-76](https://linear.app/neon-sprawl/issue/NEO-76) → [NEO-86](https://linear.app/neon-sprawl/issue/NEO-86); gig XP **E5M1-10** [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44).
+
 ### Slice 2 - NPC archetypes and telegraphs

 - Scope: E5.M2 for three archetypes: melee pressure, ranged control, elite mini-boss.
--- a/docs/decomposition/modules/CT_M1_ContentValidationPipeline.md
+++ b/docs/decomposition/modules/CT_M1_ContentValidationPipeline.md
@ -49,7 +49,9 @@ Content tooling **Slice 1** — schemas + CI; **Slice 4** — server parity hard

 **Resource node catalogs ([NEO-57](https://linear.app/neon-sprawl/issue/NEO-57)):** the same script validates `content/resource-nodes/*_resource_nodes.json` rows against [`content/schemas/resource-node-def.schema.json`](../../../content/schemas/resource-node-def.schema.json) and `*_resource_yields.json` rows against [`content/schemas/resource-yield-row.schema.json`](../../../content/schemas/resource-yield-row.schema.json); rejects **duplicate `nodeDefId`**; (Slice 2) enforces the **frozen four-node** id set, **one row per `gatherLens`**, exactly **one yield row per node**, yield **`itemId`** cross-check against item catalogs, and **only `scrap_metal_bulk`** as yield item in prototype.

-**Recipe catalogs ([NEO-65](https://linear.app/neon-sprawl/issue/NEO-65)):** the same script validates each row in `content/recipes/*_recipes.json` against [`content/schemas/recipe-def.schema.json`](../../../content/schemas/recipe-def.schema.json) (I/O rows via [`recipe-io-row.schema.json`](../../../content/schemas/recipe-io-row.schema.json)), rejects **duplicate `id`** across files, cross-checks every input/output **`itemId`** against item catalogs and every **`requiredSkillId`** against skill catalogs, and (Slice 3) enforces the **frozen eight-recipe** id set, at least one **`process`** and one **`make`** row, and **`requiredSkillId: refine`** on every row. Extend the script when additional catalogs and schemas ship.
+**Recipe catalogs ([NEO-65](https://linear.app/neon-sprawl/issue/NEO-65)):** the same script validates each row in `content/recipes/*_recipes.json` against [`content/schemas/recipe-def.schema.json`](../../../content/schemas/recipe-def.schema.json) (I/O rows via [`recipe-io-row.schema.json`](../../../content/schemas/recipe-io-row.schema.json)), rejects **duplicate `id`** across files, cross-checks every input/output **`itemId`** against item catalogs and every **`requiredSkillId`** against skill catalogs, and (Slice 3) enforces the **frozen eight-recipe** id set, at least one **`process`** and one **`make`** row, and **`requiredSkillId: refine`** on every row.
+
+**Ability catalogs ([NEO-76](https://linear.app/neon-sprawl/issue/NEO-76)):** the same script validates each row in `content/abilities/*_abilities.json` against [`content/schemas/ability-def.schema.json`](../../../content/schemas/ability-def.schema.json), rejects **duplicate `id`** across files, and (E5 Slice 1) enforces the **frozen four-ability** id set (`prototype_pulse`, `prototype_guard`, `prototype_dash`, `prototype_burst`). Extend the script when additional catalogs and schemas ship.

 **Decomposition vocabulary:** the same workflow runs [`scripts/check_decomposition_language.py`](../../../scripts/check_decomposition_language.py) (stdlib only) over `docs/decomposition/**/*.md` to catch wording that treats **combat** as a leveled **`SkillDef`** line instead of **gig** progression (see script docstring for patterns). Adjust the script if a future doc needs a documented exception.

--- a/docs/decomposition/modules/E5_M1_CombatRulesEngine.md
+++ b/docs/decomposition/modules/E5_M1_CombatRulesEngine.md
@ -7,7 +7,8 @@
 | **Module ID** | E5.M1 |
 | **Epic** | [Epic 5 — PvE Combat](../epics/epic_05_pve_combat.md) |
 | **Stage target** | Prototype |
-| **Status** | Planned (see [dependency register](module_dependency_register.md)) |
+| **Status** | In Progress — Slice 1 backlog [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md): E5M1-01 [NEO-76](https://linear.app/neon-sprawl/issue/NEO-76) ability catalog + CI landed; E5M1-02+ pending (see [dependency register](module_dependency_register.md)) |
+| **Linear** | Label **`E5.M1`** · [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md) **E5M1-01** [NEO-76](https://linear.app/neon-sprawl/issue/NEO-76) → **E5M1-12** [NEO-86](https://linear.app/neon-sprawl/issue/NEO-86); gig XP **E5M1-10** [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44) |

 ## Purpose

@ -49,6 +50,38 @@ Core tab-target combat resolution: valid actions against a locked target, hit re

 See Epic 5 **Slice 1 — Combat rules MVP**: target lock, basic attacks, 4–6 abilities, cooldowns/resources; telemetry `encounter_start`, `ability_used`, `player_death`, `enemy_defeat`.

+## Linear backlog (decomposed)
+
+Full story tables, kickoff defaults, and **`blockedBy` graph:** [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md).
+
+| Slug | Linear |
+|------|--------|
+| E5M1-01 | [NEO-76](https://linear.app/neon-sprawl/issue/NEO-76) |
+| E5M1-02 | [NEO-77](https://linear.app/neon-sprawl/issue/NEO-77) |
+| E5M1-03 | [NEO-79](https://linear.app/neon-sprawl/issue/NEO-79) |
+| E5M1-04 | [NEO-78](https://linear.app/neon-sprawl/issue/NEO-78) |
+| E5M1-05 | [NEO-80](https://linear.app/neon-sprawl/issue/NEO-80) |
+| E5M1-06 | [NEO-81](https://linear.app/neon-sprawl/issue/NEO-81) |
+| E5M1-07 | [NEO-82](https://linear.app/neon-sprawl/issue/NEO-82) |
+| E5M1-08 | [NEO-83](https://linear.app/neon-sprawl/issue/NEO-83) |
+| E5M1-09 | [NEO-84](https://linear.app/neon-sprawl/issue/NEO-84) |
+| E5M1-10 | [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44) |
+| E5M1-11 | [NEO-85](https://linear.app/neon-sprawl/issue/NEO-85) |
+| E5M1-12 | [NEO-86](https://linear.app/neon-sprawl/issue/NEO-86) |
+
+## Prototype Slice 1 freeze (E5M1-01)
+
+The **first shipped four-ability combat spine** under `content/abilities/*.json` is **frozen** for hotbar bindings, cast validation, and combat resolution until a deliberate migration or follow-up issue expands the roster.
+
+| `AbilityDef.id` | `displayName` | `baseDamage` | `cooldownSeconds` | `abilityKind` |
+|-----------------|---------------|--------------|-------------------|---------------|
+| **`prototype_pulse`** | Prototype Pulse | 25 | 3.0 | `attack` |
+| **`prototype_guard`** | Prototype Guard | 0 | 6.0 | `utility` |
+| **`prototype_dash`** | Prototype Dash | 0 | 4.0 | `movement` |
+| **`prototype_burst`** | Prototype Burst | 40 | 5.0 | `attack` |
+
+**Rules:** Do **not** rename these `id` values—change **`displayName`** only, or add a new `id` in a follow-up issue. CI ([`scripts/validate_content.py`](../../../scripts/validate_content.py)) enforces **exactly** these four ids and duplicate-`id` rejection across all ability JSON files. Relaxing or changing that gate belongs in a new Linear issue once the catalog intentionally grows. **`prototype_pulse`** at 25 damage × 4 casts defeats a 100 HP prototype dummy (E5M1 backlog default). Server load: [NEO-77](https://linear.app/neon-sprawl/issue/NEO-77) (E5M1-02).
+
 ## Prototype notes (NEO-28)

 Epic 1 **Slice 3** exercises a minimal cast accept/deny surface on **`POST /game/players/{id}/ability-cast`** before the full engine exists: after hotbar/loadout validation ([E1.M4](E1_M4_AbilityInputScaffold.md)), the server requires **`targetId`** to match the persisted combat lock, resolve in the prototype target registry, and sit within horizontal lock radius against authoritative **`PositionState`**. Deny codes **`invalid_target`** and **`out_of_range`** reuse the same strings as E1.M3 **`TargetState.validity`** for vocabulary alignment. **`accepted: true`** still does not imply damage, cooldown commit, or a full **`CombatResolution`** payload — those remain E5.M1 scope.
--- a/docs/decomposition/modules/documentation_and_implementation_alignment.md
+++ b/docs/decomposition/modules/documentation_and_implementation_alignment.md
@ -56,6 +56,7 @@ Rows appear when work starts; default for unlisted modules is **Planned** / not
 | E3.M1 | Ready | **NEO-41 landed (prototype, superseded on interact by NEO-63):** inline XP on **`resource_node`** interact. **NEO-57–NEO-61** — content, registry, HTTP defs, depletion store (see prior alignment). **NEO-62 landed:** **`GatherOperations`** + **`GatherResult`**. **NEO-63 landed:** **`POST …/interact`** **`resource_node`** → gather engine; **four** **`PrototypeInteractableRegistry`** anchors; Bruno gather → inventory + depletion deny ([NEO-63](../../plans/NEO-63-implementation-plan.md), [`NEO-63` manual QA](../../manual-qa/NEO-63.md)); [server README — Gather via interact (NEO-63)](../../../server/README.md#gather-via-interact-neo-63). **NEO-64 landed:** comment-only **`resource_gathered`** / **`gather_node_depleted`** hook sites in **`GatherOperations.TryGather`** ([NEO-64](../../plans/NEO-64-implementation-plan.md), [`NEO-64` manual QA](../../manual-qa/NEO-64.md)); Epic 3 Slice 2 backlog **E3M1-01**–**E3M1-08** complete. **NEO-73 landed:** client gather feedback — **`skill_progression_client.gd`**, **`prototype_interactable_picker.gd`** (nearest in-range **R**), **`GatherFeedbackLabel`** + **`SkillProgressionLabel`**, auto inventory/skill refresh after successful gather ([NEO-73](../../plans/NEO-73-implementation-plan.md), [`NEO-73` manual QA](../../manual-qa/NEO-73.md)); `client/README.md` gather section. **NEO-75 landed:** capstone gather→refine→make loop in Godot — [`NEO-75` manual QA](../../manual-qa/NEO-75.md), `client/README.md` end-to-end section; Epic 3 Slice 5 client complete. | [NEO-41](../../plans/NEO-41-implementation-plan.md) … [NEO-64](../../plans/NEO-64-implementation-plan.md), [NEO-73](../../plans/NEO-73-implementation-plan.md), [NEO-75](../../plans/NEO-75-implementation-plan.md), [E3S5-client-prototype-backlog](../../plans/E3S5-client-prototype-backlog.md), [E3_M1](E3_M1_ResourceNodeAndGatherLoop.md); `server/NeonSprawl.Server/Game/Gathering/`, `Game/Interaction/`, `client/scripts/skill_progression_client.gd`, `client/scripts/prototype_interactable_picker.gd` |
 | E3.M3 | In Progress | **NEO-50 landed:** frozen prototype six-item catalog in [`content/items/prototype_items.json`](../../../content/items/prototype_items.json); [`item-def.schema.json`](../../../content/schemas/item-def.schema.json); PR gate + [`validate_content.py`](../../../scripts/validate_content.py). **NEO-51 landed:** fail-fast server load of `content/items/*_items.json` at startup — `server/NeonSprawl.Server/Game/Items/` ([NEO-51](../../plans/NEO-51-implementation-plan.md)); [server README — Item catalog](../../../server/README.md#item-catalog-contentitems-neo-51). **NEO-52 landed:** injectable **`IItemDefinitionRegistry`** + lookup tests ([NEO-52](../../plans/NEO-52-implementation-plan.md)). **NEO-53 landed:** **`GET /game/world/item-definitions`** — `ItemDefinitionsWorldApi` + DTOs in `Game/Items/` ([NEO-53](../../plans/NEO-53-implementation-plan.md), [`NEO-53` manual QA](../../manual-qa/NEO-53.md)); [server README — Item definitions (NEO-53)](../../../server/README.md#item-definitions-neo-53); Bruno `bruno/neon-sprawl-server/item-definitions/`. **NEO-54 landed:** **`IPlayerInventoryStore`** + **`PlayerInventoryOperations`** — 24 bag + 1 equipment slots, stack rules, `V005` migration ([NEO-54](../../plans/NEO-54-implementation-plan.md)). **NEO-55 landed:** **`GET`/`POST /game/players/{id}/inventory`** — `PlayerInventoryApi` + DTOs in `Game/Items/` ([NEO-55](../../plans/NEO-55-implementation-plan.md)); [server README — Player inventory (NEO-54 store, NEO-55 HTTP)](../../../server/README.md#player-inventory-neo-54-store-neo-55-http); Bruno `bruno/neon-sprawl-server/inventory/`. **NEO-56 landed:** comment-only **`item_created`** / **`inventory_transfer_denied`** telemetry hook sites in [`PlayerInventoryOperations`](../../../server/NeonSprawl.Server/Game/Items/PlayerInventoryOperations.cs) ([NEO-56](../../plans/NEO-56-implementation-plan.md), [`NEO-56` manual QA](../../manual-qa/NEO-56.md)); no E9.M1 ingest. **NEO-72 landed:** client inventory HUD — **`inventory_client.gd`**, **`item_definitions_client.gd`**, **`InventoryLabel`**, boot hydrate + **`I`** refresh ([NEO-72](../../plans/NEO-72-implementation-plan.md), [`NEO-72` manual QA](../../manual-qa/NEO-72.md)); `client/README.md` inventory HUD section. **NEO-75 landed:** **`prototype_economy_hud_section.gd`** collapse toggle + capstone manual QA ([NEO-75](../../plans/NEO-75-implementation-plan.md), [`NEO-75` manual QA](../../manual-qa/NEO-75.md)); Epic 3 Slice 5 client complete. | [NEO-50](../../plans/NEO-50-implementation-plan.md), [NEO-51](../../plans/NEO-51-implementation-plan.md), [NEO-52](../../plans/NEO-52-implementation-plan.md), [NEO-53](../../plans/NEO-53-implementation-plan.md), [NEO-54](../../plans/NEO-54-implementation-plan.md), [NEO-55](../../plans/NEO-55-implementation-plan.md), [NEO-56](../../plans/NEO-56-implementation-plan.md), [NEO-72](../../plans/NEO-72-implementation-plan.md), [NEO-75](../../plans/NEO-75-implementation-plan.md), [E3S5-client-prototype-backlog](../../plans/E3S5-client-prototype-backlog.md), [E3M3-prototype-backlog](../../plans/E3M3-prototype-backlog.md), [E3_M3](E3_M3_ItemizationAndInventorySchema.md) |
 | E3.M2 | Ready | **NEO-65 landed:** frozen prototype eight-recipe catalog in [`content/recipes/prototype_recipes.json`](../../../content/recipes/prototype_recipes.json); [`recipe-def.schema.json`](../../../content/schemas/recipe-def.schema.json) + [`recipe-io-row.schema.json`](../../../content/schemas/recipe-io-row.schema.json); PR gate + [`validate_content.py`](../../../scripts/validate_content.py) Slice 3 gates ([NEO-65](../../plans/NEO-65-implementation-plan.md)). **NEO-66 landed:** fail-fast server load of `content/recipes/*_recipes.json` at startup — `server/NeonSprawl.Server/Game/Crafting/` ([NEO-66](../../plans/NEO-66-implementation-plan.md)); [server README — Recipe catalog](../../../server/README.md#recipe-catalog-contentrecipes-neo-66). **NEO-67 landed:** injectable **`IRecipeDefinitionRegistry`** + lookup tests ([NEO-67](../../plans/NEO-67-implementation-plan.md)). **NEO-68 landed:** **`GET /game/world/recipe-definitions`** — `RecipeDefinitionsWorldApi` + DTOs in `Game/Crafting/` ([NEO-68](../../plans/NEO-68-implementation-plan.md), [`NEO-68` manual QA](../../manual-qa/NEO-68.md)); [server README — Recipe definitions (NEO-68)](../../../server/README.md#recipe-definitions-neo-68); Bruno `bruno/neon-sprawl-server/recipe-definitions/`. **NEO-69 landed:** **`CraftOperations.TryCraft`** + **`CraftResult`** — pre-flight inputs/outputs, inventory mutation, refine XP ([NEO-69](../../plans/NEO-69-implementation-plan.md)); [server README — Craft engine (NEO-69)](../../../server/README.md#craft-engine-neo-69-and-craft-http-neo-70). **NEO-70 landed:** **`POST /game/players/{id}/craft`** — `PlayerCraftApi` + wire **`CraftResponse`**; Bruno gather→refine→make spine ([NEO-70](../../plans/NEO-70-implementation-plan.md)); Bruno `bruno/neon-sprawl-server/craft/`. **NEO-71 landed:** comment-only **`item_crafted`** / **`craft_failed`** telemetry hook sites in **`CraftOperations.TryCraft`** ([NEO-71](../../plans/NEO-71-implementation-plan.md)); [server README — Craft telemetry hooks (NEO-71)](../../../server/README.md#craft-telemetry-hooks-neo-71). **NEO-42 landed (prep):** **`RefineActivitySkillXpGrant`** / **`RefineSkillXpConstants`** — wired from craft engine success path. Epic 3 Slice 3 server backlog **E3M2-01**–**E3M2-07** complete. Upstream: E3.M1 **Ready**, E3.M3 inventory landed. **NEO-74 landed:** client craft UI — **`recipe_definitions_client.gd`**, **`craft_client.gd`**, **`craft_recipe_panel.gd`**, **`CraftFeedbackLabel`**, **refine** skill row ([NEO-74](../../plans/NEO-74-implementation-plan.md), [`NEO-74` manual QA](../../manual-qa/NEO-74.md)); `client/README.md` craft section. **NEO-75 landed:** capstone playable gather→refine→make loop — [`NEO-75` manual QA](../../manual-qa/NEO-75.md), **`prototype_economy_hud_section.gd`**; Epic 3 Slice 5 client complete. | [NEO-42](../../plans/NEO-42-implementation-plan.md), [NEO-65](../../plans/NEO-65-implementation-plan.md), [NEO-66](../../plans/NEO-66-implementation-plan.md), [NEO-67](../../plans/NEO-67-implementation-plan.md), [NEO-68](../../plans/NEO-68-implementation-plan.md), [NEO-69](../../plans/NEO-69-implementation-plan.md), [NEO-70](../../plans/NEO-70-implementation-plan.md), [NEO-71](../../plans/NEO-71-implementation-plan.md), [NEO-74](../../plans/NEO-74-implementation-plan.md), [NEO-75](../../plans/NEO-75-implementation-plan.md), [E3M2-prototype-backlog](../../plans/E3M2-prototype-backlog.md), [E3S5-client-prototype-backlog](../../plans/E3S5-client-prototype-backlog.md), [E3_M2](E3_M2_RefinementAndRecipeExecution.md) |
+| E5.M1 | In Progress | **NEO-76 landed:** frozen prototype four-ability catalog in [`content/abilities/prototype_abilities.json`](../../../content/abilities/prototype_abilities.json); [`ability-def.schema.json`](../../../content/schemas/ability-def.schema.json); PR gate + [`validate_content.py`](../../../scripts/validate_content.py) E5M1 four-id gate ([NEO-76](../../plans/NEO-76-implementation-plan.md)). **Backlog decomposed:** Epic 5 Slice 1 — [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md) **E5M1-02** [NEO-77](https://linear.app/neon-sprawl/issue/NEO-77) through **E5M1-12** [NEO-86](https://linear.app/neon-sprawl/issue/NEO-86); gig XP **E5M1-10** [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44). **Precursor landed:** E1.M4 cast funnel (NEO-28/31/32) — **`POST …/ability-cast`** accepts without **`CombatResolution`** yet. | [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md), [E5_M1](E5_M1_CombatRulesEngine.md), [E1M4-prototype-backlog.md](../../plans/E1M4-prototype-backlog.md) |

 ---

--- a/docs/decomposition/modules/module_dependency_register.md
+++ b/docs/decomposition/modules/module_dependency_register.md
@ -71,11 +71,13 @@ Fleshed-out scope, contracts, and integration notes live in **per-module documen

 | Module ID | Module Name | Depends On | Contract Needed | Phase Required | Status |
 |---|---|---|---|---|---|
-| E5.M1 | CombatRulesEngine | E1.M3, E2.M2 | CombatAction, CombatResolution, ThreatState | Prototype | Planned |
+| E5.M1 | CombatRulesEngine | E1.M3, E2.M2 | CombatAction, CombatResolution, ThreatState | Prototype | In Progress |
 | E5.M2 | NpcAiAndBehaviorProfiles | E5.M1 | NpcBehaviorDef, TelegraphEvent, AggroRule | Prototype | Planned |
 | E5.M3 | EncounterAndRewardTables | E5.M1, E3.M3, E7.M2 | EncounterDef, RewardTable, EncounterCompleteEvent | Prototype | Planned |
 | E5.M4 | GroupCombatScaling | E5.M3, E8.M1 | ScalingProfile, PartySizeModifier, CombatDifficultyBand | Pre-production | Planned |

+**E5.M1 note:** Epic 5 **Slice 1** backlog in Linear ([Epic 5 — PvE Combat and Encounter Content](https://linear.app/neon-sprawl/project/epic-5-pve-combat-and-encounter-content-cf3c94c3-5346-40e0-8aaf-281e846f2846)): [NEO-76](https://linear.app/neon-sprawl/issue/NEO-76) → [NEO-86](https://linear.app/neon-sprawl/issue/NEO-86); label **`E5.M1`**. Gig XP on defeat: **E5M1-10** [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44). See [E5M1-prototype-backlog.md](../../plans/E5M1-prototype-backlog.md), [E5_M1_CombatRulesEngine.md](E5_M1_CombatRulesEngine.md). Builds on E1.M4 cast funnel (NEO-28/31/32); extends **`POST …/ability-cast`** with **`CombatResolution`**. **NEO-76 landed:** frozen four-ability catalog + CI ([NEO-76 plan](../../plans/NEO-76-implementation-plan.md)).
+
 ### Epic 6 — PvP Security

 | Module ID | Module Name | Depends On | Contract Needed | Phase Required | Status |
--- a/docs/plans/E5M1-prototype-backlog.md
+++ b/docs/plans/E5M1-prototype-backlog.md
@ -0,0 +1,383 @@
+# E5.M1 — Prototype story backlog (CombatRulesEngine)
+
+Working backlog for **Epic 5 — Slice 1** ([combat rules MVP](../decomposition/epics/epic_05_pve_combat.md#slice-1---combat-rules-mvp)). Decomposition and contracts: [E5.M1 — CombatRulesEngine](../decomposition/modules/E5_M1_CombatRulesEngine.md).
+
+**Labels (Linear):** every issue **`E5.M1`**; add **`server`** or **`client`** + **`Story`** as listed.
+
+**Precursor (do not re-scope):** [E1.M4](../decomposition/modules/E1_M4_AbilityInputScaffold.md) cast funnel — hotbar loadout ([NEO-29](https://linear.app/neon-sprawl/issue/NEO-29)), cast POST + client digits ([NEO-31](https://linear.app/neon-sprawl/issue/NEO-31)), target lock + range deny ([NEO-28](https://linear.app/neon-sprawl/issue/NEO-28)), global cooldown + snapshot ([NEO-32](https://linear.app/neon-sprawl/issue/NEO-32)), telemetry hook comments ([NEO-30](https://linear.app/neon-sprawl/issue/NEO-30)). **`POST …/ability-cast`** today returns **`accepted: true`** with **no** damage, **no** per-ability cooldown from data, and **no** **`CombatResolution`** payload — that gap is **E5.M1**.
+
+**Upstream (must be landed):** [E1.M3](../decomposition/modules/E1_M3_InteractionAndTargetingLayer.md) targeting ([NEO-23](https://linear.app/neon-sprawl/issue/NEO-23)–[NEO-26](https://linear.app/neon-sprawl/issue/NEO-26)) — **`PrototypeTargetRegistry`** alpha/beta stubs remain combat dummies until [E5.M2](../decomposition/modules/E5_M2_NpcAiAndBehaviorProfiles.md). [E2.M2](../decomposition/modules/E2_M2_XpAwardAndLevelEngine.md) skill XP engine is **not** the combat payout path — gig XP is [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44).
+
+**Prototype combat spine (frozen in E5M1-01):** **four** `AbilityDef` rows — ids **`prototype_pulse`**, **`prototype_guard`**, **`prototype_dash`**, **`prototype_burst`** (same allowlist as today’s hardcoded [`PrototypeAbilityRegistry`](../../server/NeonSprawl.Server/Game/AbilityInput/PrototypeAbilityRegistry.cs)). **Two** combat dummies — **`prototype_target_alpha`** / **`prototype_target_beta`** with shared max HP. Player-as-target hostility and **E6.M1** PvP gates stay **stub deny** until Epic 6; prototype targets are NPC stubs only.
+
+**Linear issues (created):** attach `docs/plans/NEO-*-implementation-plan.md` on the same branch as implementation work.
+
+| Slug | Layer | Linear |
+|------|-------|--------|
+| E5M1-01 | server | [NEO-76](https://linear.app/neon-sprawl/issue/NEO-76) |
+| E5M1-02 | server | [NEO-77](https://linear.app/neon-sprawl/issue/NEO-77) |
+| E5M1-03 | server | [NEO-79](https://linear.app/neon-sprawl/issue/NEO-79) |
+| E5M1-04 | server | [NEO-78](https://linear.app/neon-sprawl/issue/NEO-78) |
+| E5M1-05 | server | [NEO-80](https://linear.app/neon-sprawl/issue/NEO-80) |
+| E5M1-06 | server | [NEO-81](https://linear.app/neon-sprawl/issue/NEO-81) |
+| E5M1-07 | server | [NEO-82](https://linear.app/neon-sprawl/issue/NEO-82) |
+| E5M1-08 | server | [NEO-83](https://linear.app/neon-sprawl/issue/NEO-83) |
+| E5M1-09 | server | [NEO-84](https://linear.app/neon-sprawl/issue/NEO-84) |
+| E5M1-10 | server | [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44) |
+| E5M1-11 | client | [NEO-85](https://linear.app/neon-sprawl/issue/NEO-85) |
+| E5M1-12 | client | [NEO-86](https://linear.app/neon-sprawl/issue/NEO-86) |
+
+**Dependency graph in Linear:** E5M1-02 blocked by E5M1-01. E5M1-03 blocked by E5M1-02. E5M1-04 blocked by E5M1-03. E5M1-05 blocked by E5M1-03. E5M1-06 blocked by E5M1-05 and E5M1-03. E5M1-07 blocked by E5M1-06. E5M1-08 blocked by E5M1-06 (may parallel E5M1-07). E5M1-09 blocked by E5M1-07. E5M1-10 (NEO-44) blocked by E5M1-07. E5M1-11 blocked by E5M1-07 and E5M1-08. E5M1-12 blocked by E5M1-11 and E5M1-10.
+
+**Board order:** estimates **1–12** matching slug order (E5M1-01 = 1 … E5M1-12 = 12). On the Epic 5 project board, sort by **Estimate** (ascending).
+
+---
+
+## Story order (recommended)
+
+| Order | Slug | Layer | Depends on |
+|-------|------|-------|------------|
+| 1 | **E5M1-01** | server | Existing four prototype ability ids (hardcoded allowlist) |
+| 2 | **E5M1-02** | server | E5M1-01 |
+| 3 | **E5M1-03** | server | E5M1-02 |
+| 4 | **E5M1-04** | server | E5M1-03 |
+| 5 | **E5M1-05** | server | E5M1-03, `PrototypeTargetRegistry` ids |
+| 6 | **E5M1-06** | server | E5M1-05, E5M1-03 |
+| 7 | **E5M1-07** | server | E5M1-06 |
+| 8 | **E5M1-08** | server | E5M1-06 |
+| 9 | **E5M1-09** | server | E5M1-07 |
+| 10 | **E5M1-10** | server | E5M1-07 ([NEO-44](https://linear.app/neon-sprawl/issue/NEO-44)) |
+| 11 | **E5M1-11** | client | E5M1-07, E5M1-08 |
+| 12 | **E5M1-12** | client | E5M1-11, E5M1-10 |
+
+**Downstream (separate modules):** [E5.M2](../decomposition/modules/E5_M2_NpcAiAndBehaviorProfiles.md) NPC AI + telegraphs; [E5.M3](../decomposition/modules/E5_M3_EncounterAndRewardTables.md) encounters + loot; [E1.M4](../decomposition/modules/E1_M4_AbilityInputScaffold.md) closes when **`CombatResolution`** lands; per-ability cooldown UI may refresh from extended cast responses or existing snapshot route.
+
+---
+
+## Kickoff decisions (decomposition defaults)
+
+| Topic | Decision | Rationale |
+|-------|----------|-----------|
+| Ability count | **4** frozen defs | Matches existing hotbar allowlist; epic allows 4–6 |
+| Combat targets | **`prototype_target_alpha`** / **`beta`** only | Reuse E1.M3 registry until E5.M2 spawns real NPCs |
+| Max HP | **100** per dummy (constant in content or combat constants) | Enough casts to observe defeat without tuning TTK yet |
+| Hit resolution | **Deterministic** damage from `AbilityDef.baseDamage`; no miss/crit RNG | Readable prototype tests; RNG is pre-production |
+| Cooldown | **Per-ability** `cooldownSeconds` from catalog on successful **resolve** | Replaces global `AbilityPrototypeCooldown` when E5M1-07 lands |
+| Player HP / death | **Out of scope** Slice 1 | `player_death` telemetry gets a **reserved** hook site only |
+| `ThreatState` | **Stub** / comment-only in Slice 1 | Full threat/aggro is E5.M2 |
+| PvP | **Stub** deny path documented; no player targets in prototype registry | [pvp_combat_integration.md](../decomposition/modules/pvp_combat_integration.md) |
+| Cast wire | **Extend** `POST …/ability-cast` **`AbilityCastResponse` v1** | Avoid parallel combat POST in prototype; E1.M4 client keeps one route |
+| Target HP read | **`GET /game/world/combat-targets`** snapshot | Client HUD without trusting local damage math |
+| Gig XP | **[NEO-44](https://linear.app/neon-sprawl/issue/NEO-44)** on **`targetDefeated`** | Combat → **gig** XP only; no E2.M2 skill grant |
+
+---
+
+### E5M1-01 — Prototype AbilityDef catalog + schemas + CI
+
+**Goal:** Lock content shape and CI validation for **four** frozen combat abilities before server load.
+
+**In scope**
+
+- `content/schemas/ability-def.schema.json`.
+- `content/abilities/prototype_abilities.json` with stable **`id`** values matching today’s allowlist (`prototype_pulse`, `prototype_guard`, `prototype_dash`, `prototype_burst`).
+- Fields: **`displayName`**, **`baseDamage`** (non-negative int), **`cooldownSeconds`** (positive number), optional **`abilityKind`** enum for future UX (`attack` / `utility` / `movement`).
+- `scripts/validate_content.py`: schema validation, duplicate ids, exact four-id allowlist, non-empty display names.
+- Designer note in [E5_M1](../decomposition/modules/E5_M1_CombatRulesEngine.md) + `content/README.md`.
+
+**Out of scope**
+
+- Server loader, combat engine, HTTP, Godot.
+
+**Acceptance criteria**
+
+- [x] PR gate validates ability JSON against schema.
+- [x] Exactly four prototype ability ids; duplicate `id` fails CI.
+- [x] Stable id list documented in module doc freeze box.
+
+**Landed ([NEO-76](https://linear.app/neon-sprawl/issue/NEO-76)):** [`content/abilities/prototype_abilities.json`](../../content/abilities/prototype_abilities.json), [`ability-def.schema.json`](../../content/schemas/ability-def.schema.json), CI gates in [`validate_content.py`](../../scripts/validate_content.py); plan [NEO-76-implementation-plan.md](NEO-76-implementation-plan.md).
+
+---
+
+### E5M1-02 — Server ability catalog load (fail-fast)
+
+**Goal:** Disk → host: startup load of `content/abilities/*.json` with CI-parity validation.
+
+**In scope**
+
+- Loader + catalog types under `server/NeonSprawl.Server/Game/Combat/` (path finalized in plan).
+- Fail-fast on malformed files, duplicate ids, allowlist mismatch with CI.
+- Unit tests (AAA) for loader happy path and failure modes.
+- `server/README.md` section.
+
+**Out of scope**
+
+- Injectable registry interface (E5M1-03), HTTP projection, combat resolution.
+
+**Acceptance criteria**
+
+- [ ] Host fails startup on invalid ability JSON (mirror CI rules).
+- [ ] Tests cover at least one happy path and one malformed catalog rejection.
+
+---
+
+### E5M1-03 — `IAbilityDefinitionRegistry` + DI
+
+**Goal:** Injectable lookup for combat and hotbar validation; replace direct static allowlist reads over time.
+
+**In scope**
+
+- `IAbilityDefinitionRegistry` + implementation backed by startup catalog.
+- DI registration in `Program.cs`.
+- Unit tests (AAA) for known-id lookup and unknown-id miss.
+- Migrate **`PrototypeAbilityRegistry`** call sites in hotbar/cast path to registry (keep normalize behavior).
+
+**Out of scope**
+
+- HTTP GET route (E5M1-04), damage application.
+
+**Acceptance criteria**
+
+- [ ] Unknown ability id fails hotbar/cast validation same as today.
+- [ ] All four prototype ids resolve with expected **`baseDamage`** / **`cooldownSeconds`**.
+
+---
+
+### E5M1-04 — `GET /game/world/ability-definitions`
+
+**Goal:** Versioned read-only projection of frozen ability defs for client/tooling.
+
+**In scope**
+
+- `GET /game/world/ability-definitions` → list DTO (`schemaVersion`, `abilities[]` with id, displayName, baseDamage, cooldownSeconds, abilityKind).
+- API + integration tests (AAA); Bruno folder `bruno/neon-sprawl-server/ability-definitions/`.
+- `server/README.md`; manual QA stub if needed.
+
+**Out of scope**
+
+- Godot HUD — client uses this optionally in E5M1-11; not required for Bruno proof.
+
+**Acceptance criteria**
+
+- [ ] GET returns all four prototype abilities with stable field names.
+- [ ] Bruno happy path documents response shape.
+
+**Client counterpart:** optional enrichment in [NEO-85](#e5m1-11--client-combat-feedback--target-hp-hud) — not a separate issue.
+
+---
+
+### E5M1-05 — Combat entity health store + prototype dummy init
+
+**Goal:** Server-owned HP for combat dummies keyed by target id.
+
+**In scope**
+
+- `ICombatEntityHealthStore` (or equivalent) with **`TryGet`**, **`ApplyDamage`**, **`TryResetToFull`** for prototype targets.
+- Initialize **`prototype_target_alpha`** and **`prototype_target_beta`** to catalog max HP at first access (in-memory; not persisted in Slice 1).
+- Unit tests (AAA) for damage, floor at zero, defeated flag.
+
+**Out of scope**
+
+- Player HP, persistence migration, NPC spawn (E5.M2).
+
+**Acceptance criteria**
+
+- [ ] Damaging alpha reduces stored HP; HP cannot go below zero.
+- [ ] Defeated target remains defeated until explicit reset policy (document prototype: server restart resets).
+
+---
+
+### E5M1-06 — `CombatOperations.TryResolve` + `CombatResult`
+
+**Goal:** Pure server combat resolution: ability + target → damage + remaining HP + defeated.
+
+**In scope**
+
+- `CombatOperations.TryResolve` (name TBD) using **`IAbilityDefinitionRegistry`** + **`ICombatEntityHealthStore`**.
+- Result type with **`damageDealt`**, **`targetRemainingHp`**, **`targetDefeated`**, stable deny **`reasonCode`** when target already defeated or unknown.
+- Unit tests (AAA) for happy path, zero-damage utility abilities, defeated-target deny.
+
+**Out of scope**
+
+- HTTP wiring (E5M1-07), gig XP (NEO-44), telemetry hooks.
+
+**Acceptance criteria**
+
+- [ ] **`prototype_pulse`** against full HP dummy deals catalog damage deterministically.
+- [ ] Second resolve on defeated target returns structured deny (no silent no-op).
+
+---
+
+### E5M1-07 — Wire `ability-cast` into combat engine + extend cast response
+
+**Goal:** Successful casts after E1.M4 gates invoke **`CombatOperations`** and return **`CombatResolution`** fields on the existing cast POST.
+
+**In scope**
+
+- After NEO-28/32 gates pass, call combat engine; commit per-ability cooldown from ability def (replace global constant).
+- Extend **`AbilityCastResponse` v1** with optional resolution block on accept: e.g. **`damageDealt`**, **`targetRemainingHp`**, **`targetDefeated`**, **`targetId`**, **`abilityId`** (exact names in plan).
+- JSON deny **`target_defeated`** (or aligned code) when firing at defeated dummy.
+- Integration tests + Bruno: lock target → cast → response shows damage; repeated casts until defeated then deny.
+- `server/README.md` cast section updated; cross-link E1.M4/E5.M1 deny vocabulary.
+
+**Out of scope**
+
+- Godot presentation — **[NEO-85](#e5m1-11--client-combat-feedback--target-hp-hud)**.
+- Rich **`ThreatState`**, player damage, PvP eligibility (stub only).
+
+**Acceptance criteria**
+
+- [ ] Accept path returns non-empty resolution payload with deterministic damage.
+- [ ] Cooldown duration matches ability catalog, not global constant.
+- [ ] Bruno documents lock → cast → damage → defeat deny spine.
+
+**Client counterpart:** [NEO-85](https://linear.app/neon-sprawl/issue/NEO-85)
+
+---
+
+### E5M1-08 — `GET /game/world/combat-targets` snapshot
+
+**Goal:** Read-only HP snapshot for prototype combat dummies for client HUD and manual QA.
+
+**In scope**
+
+- `GET /game/world/combat-targets` → versioned list (`targetId`, `maxHp`, `currentHp`, `defeated`).
+- Seeds store entries for alpha/beta on first read (same init policy as E5M1-05).
+- API tests (AAA); Bruno folder; README section.
+
+**Out of scope**
+
+- Godot wiring (E5M1-11), NPC movement.
+
+**Acceptance criteria**
+
+- [ ] GET reflects damage applied via cast route without client-side HP math.
+- [ ] Defeated flag true after lethal cast sequence in Bruno.
+
+**Client counterpart:** [NEO-85](https://linear.app/neon-sprawl/issue/NEO-85)
+
+---
+
+### E5M1-09 — Slice 1 combat telemetry hook sites
+
+**Goal:** Comment-only hooks for Epic 5 Slice 1 product telemetry names; no E9.M1 ingest.
+
+**In scope**
+
+- Hook placement in combat resolve / cast accept path for **`ability_used`**, **`enemy_defeat`**.
+- Reserved **`encounter_start`** / **`player_death`** comment sites (encounters and player HP deferred).
+- `TODO(E9.M1)` markers; README + module doc pointers.
+
+**Out of scope**
+
+- Production logging, dashboards.
+
+**Acceptance criteria**
+
+- [ ] Hook names match [epic_05 Slice 1](../decomposition/epics/epic_05_pve_combat.md#slice-1---combat-rules-mvp) vocabulary.
+- [ ] **`enemy_defeat`** site fires only on transition to defeated (not every overkill cast).
+
+---
+
+### E5M1-10 — Gig XP on combat defeat ([NEO-44](https://linear.app/neon-sprawl/issue/NEO-44))
+
+**Goal:** On prototype target defeat, award **gig XP** to the attacker's **main gig** — **not** E2.M2 skill XP.
+
+**In scope**
+
+- Minimal gig progression store + grant helper (prototype main gig only — id TBD in kickoff plan, e.g. frozen **`breach`**).
+- Hook from combat defeat path in E5M1-07 engine.
+- **`GET`** (or extend existing snapshot) for gig progression visibility — scope in implementation plan.
+- Tests proving no **`POST …/skill-progression`** call on combat defeat.
+- `server/README.md`; manual QA steps.
+
+**Out of scope**
+
+- Full nine-gig catalog UI, hub swap, sub-gig XP ([gigs.md](../game-design/gigs.md)).
+- Godot gig bar — optional in capstone [NEO-86](#e5m1-12--playable-tab-target-combat-capstone-godot).
+
+**Acceptance criteria**
+
+- [ ] Defeating **`prototype_target_alpha`** grants gig XP once per defeat transition.
+- [ ] Skill progression snapshot unchanged by combat defeat in tests.
+- [ ] Documented invariant matches [progression.md](../game-design/progression.md).
+
+**Note:** Issue pre-dates this backlog; slug **E5M1-10** maps to existing **[NEO-44](https://linear.app/neon-sprawl/issue/NEO-44)**.
+
+---
+
+### E5M1-11 — Client combat feedback + target HP HUD
+
+**Goal:** Godot displays authoritative cast outcomes and dummy HP without local combat math.
+
+**In scope**
+
+- Extend **`ability_cast_client.gd`** (or sibling) to parse extended **`AbilityCastResponse`** resolution fields.
+- Update **`CastFeedbackLabel`** (or dedicated combat line) with damage / defeat messaging on accept.
+- **`combat_targets_client.gd`** + HUD label for locked target HP (poll or refresh after successful cast + on target lock change).
+- GdUnit tests with HTTP doubles ([testing-expectations.md](../../.cursor/rules/testing-expectations.md)).
+- `docs/manual-qa/NEO-85.md` — Godot steps (server + client running).
+- `client/README.md` combat HUD section.
+
+**Out of scope**
+
+- Final combat VFX, floating damage numbers art pass, player HP bar.
+
+**Acceptance criteria**
+
+- [ ] Player sees damage/de defeat feedback in HUD after digit-key cast (not Output-only).
+- [ ] Target HP label matches server snapshot after cast sequence.
+- [ ] Manual QA exercisable without Bruno.
+
+**Client counterpart:** this issue (**NEO-85**).
+
+---
+
+### E5M1-12 — Playable tab-target combat capstone (Godot)
+
+**Goal:** Prove Epic 5 Slice 1 acceptance **in Godot**: tab-target lock, cast abilities, readable deny reasons, defeat a prototype dummy — without Bruno.
+
+**In scope**
+
+- `docs/manual-qa/NEO-86.md` single-session script: spawn → Tab lock alpha → bind slot 0 **`prototype_pulse`** → cast until defeat → verify HUD + optional gig XP visibility if NEO-44 landed.
+- `client/README.md` end-to-end combat loop section.
+- Update [documentation_and_implementation_alignment.md](../decomposition/modules/documentation_and_implementation_alignment.md) E5.M1 row when complete.
+
+**Out of scope**
+
+- NPC AI (E5.M2), encounters/loot (E5.M3), group scaling.
+
+**Acceptance criteria**
+
+- [ ] Human completes script with server + client; **`prototype_target_alpha`** shows defeated state in HUD.
+- [ ] Epic 5 Slice 1 AC: combat readable in fixed isometric camera; no silent cast failures.
+- [ ] Re-read [epic_05 Definition of Done](../decomposition/epics/epic_05_pve_combat.md#definition-of-done) for prototype minimums.
+
+**Client counterpart:** this issue (**NEO-86**).
+
+---
+
+## After this backlog
+
+- **[E5.M2](../decomposition/modules/E5_M2_NpcAiAndBehaviorProfiles.md)** Slice 2 — decompose when E5.M1 lands (NPC archetypes + telegraphs + client telegraph UX).
+- **[E1.M4](../decomposition/modules/E1_M4_AbilityInputScaffold.md)** module **Ready** when cast path returns real **`CombatResolution`** and client HUD reflects it.
+- Track delivery in Linear; keep `blockedBy` synchronized if scope changes.
+- For each issue kickoff: `docs/plans/{NEO-XX}-implementation-plan.md` per [story-kickoff](../../.cursor/rules/story-kickoff.md).
+- Add `docs/manual-qa/{NEO-XX}.md` for player-visible **client** stories when implementation lands.
+
+## Decomposition complete checklist
+
+- [x] Every player-visible AC has a **`client`** Linear issue (**NEO-85**, **NEO-86**)
+- [x] No “optional follow-up” / “future client” without NEO-XX
+- [x] Capstone client issue exists for playable Godot verification (**NEO-86**)
+- [x] [documentation_and_implementation_alignment.md](../decomposition/modules/documentation_and_implementation_alignment.md) E5.M1 row updated when work starts
+- [x] [module_dependency_register.md](../decomposition/modules/module_dependency_register.md) E5.M1 note updated when issues are created
+
+## Related docs
+
+- [E5_M1_CombatRulesEngine.md](../decomposition/modules/E5_M1_CombatRulesEngine.md)
+- [E1_M4_AbilityInputScaffold.md](../decomposition/modules/E1_M4_AbilityInputScaffold.md)
+- [epic_05_pve_combat.md](../decomposition/epics/epic_05_pve_combat.md)
+- [abilities.md](../game-design/abilities.md)
+- [gigs.md](../game-design/gigs.md)
+- [pvp_combat_integration.md](../decomposition/modules/pvp_combat_integration.md)
+- [client_server_authority.md](../decomposition/modules/client_server_authority.md)
--- a/docs/plans/NEO-76-implementation-plan.md
+++ b/docs/plans/NEO-76-implementation-plan.md
@ -0,0 +1,128 @@
+# NEO-76 — Implementation plan
+
+## Story reference
+
+| Field | Value |
+|--------|--------|
+| **Key** | NEO-76 |
+| **Title** | E5M1-01: Prototype AbilityDef catalog + schemas + CI |
+| **Linear** | https://linear.app/neon-sprawl/issue/NEO-76/e5m1-01-prototype-abilitydef-catalog-schemas-ci |
+| **Module** | [E5.M1 — CombatRulesEngine](../decomposition/modules/E5_M1_CombatRulesEngine.md) · Epic 5 Slice 1 · backlog **E5M1-01** |
+| **Branch** | `NEO-76-e5m1-prototype-backlog` |
+| **Precursor** | [E1.M4](../decomposition/modules/E1_M4_AbilityInputScaffold.md) — hardcoded allowlist in [`PrototypeAbilityRegistry`](../../server/NeonSprawl.Server/Game/AbilityInput/PrototypeAbilityRegistry.cs) (unchanged this story) |
+| **Pattern** | [NEO-50](https://linear.app/neon-sprawl/issue/NEO-50) / [NEO-65](https://linear.app/neon-sprawl/issue/NEO-65) — row JSON Schema + catalog envelope + `scripts/validate_content.py` gate |
+| **Blocks** | [NEO-77](https://linear.app/neon-sprawl/issue/NEO-77) — server ability catalog load |
+
+## Kickoff clarifications
+
+| Topic | Question | Agent recommendation | Answer |
+|--------|----------|----------------------|--------|
+| **Prototype stat freeze** | `baseDamage` / `cooldownSeconds` / `abilityKind` per row? | **Recommended table** — pulse 25 dmg / 3.0s; burst 40 / 5.0; guard 0 / 6.0 utility; dash 0 / 4.0 movement; four pulse casts = 100 HP dummy defeat; pulse cooldown matches NEO-32 global 3s. | **User:** recommended table (adopted below). |
+| **abilityKind on rows** | Required on all four prototype rows? | **Include on all four** — optional in schema but aids E5M1-04 GET / E5M1-11 HUD without follow-up schema churn. | **Adopted** (bundled with stat freeze). |
+| **Catalog envelope** | File shape? | `{ "schemaVersion": 1, "abilities": [ … ] }` in `content/abilities/prototype_abilities.json` (mirror items / recipes). | **Adopted** (NEO-50 / NEO-65 precedent). |
+| **CI constant name** | Slice gate identifier? | **`PROTOTYPE_E5M1_ABILITY_IDS`** — Epic 5 Slice 1; avoids collision with economy Slice 1–4 numbering in `validate_content.py`. | **Adopted**. |
+
+## Goal, scope, and out-of-scope
+
+**Goal:** Lock content shape and CI validation for **four** frozen `AbilityDef` rows before server load (NEO-77+).
+
+**In scope (from Linear + [E5M1-01](E5M1-prototype-backlog.md#e5m1-01--prototype-abilitydef-catalog--schemas--ci)):**
+
+- `content/schemas/ability-def.schema.json`.
+- `content/abilities/prototype_abilities.json` — four frozen ids (freeze table below).
+- `scripts/validate_content.py` — schema validation, duplicate `id`, exact four-id allowlist, non-empty `displayName`.
+- Designer note + **Prototype Slice 1 freeze** table in [E5_M1](../decomposition/modules/E5_M1_CombatRulesEngine.md) + `content/README.md`.
+- **CT.M1** PR gate paragraph for ability catalogs.
+- `documentation_and_implementation_alignment.md` E5.M1 row → **In Progress** / NEO-76.
+
+**Out of scope (from Linear):**
+
+- Server loader, combat engine, HTTP, Godot (NEO-77+).
+- Changing [`PrototypeAbilityRegistry`](../../server/NeonSprawl.Server/Game/AbilityInput/PrototypeAbilityRegistry.cs) or global cooldown behavior (NEO-77 / E5M1-07).
+
+## Acceptance criteria checklist
+
+- [x] PR gate validates ability JSON against schema.
+- [x] Exactly four prototype ability ids; duplicate `id` fails CI.
+- [x] Stable id list documented in module doc freeze box.
+
+## Implementation reconciliation (shipped)
+
+- **Schema:** [`ability-def.schema.json`](../../content/schemas/ability-def.schema.json) — required `id`, `displayName`, `baseDamage`, `cooldownSeconds`; optional `abilityKind`.
+- **Catalog:** [`prototype_abilities.json`](../../content/abilities/prototype_abilities.json) — four frozen rows per kickoff stat table.
+- **CI:** `PROTOTYPE_E5M1_ABILITY_IDS` gate in [`validate_content.py`](../../scripts/validate_content.py).
+- **Docs:** E5.M1 freeze table, `content/README.md`, CT.M1, alignment register, E5M1-01 backlog checkboxes.
+
+## Technical approach
+
+1. **Row schema (`ability-def.schema.json`):** Draft 2020-12 object; `additionalProperties: false`. Required: `id`, `displayName`, `baseDamage`, `cooldownSeconds`. `id` pattern `^[a-z][a-z0-9_]*$`. `displayName` `minLength: 1`. `baseDamage` integer ≥ 0. `cooldownSeconds` number exclusiveMinimum 0 (positive). Optional: `abilityKind` enum `attack` \| `utility` \| `movement` (present on all four prototype rows).
+
+2. **Catalog file:** `content/abilities/prototype_abilities.json` with `schemaVersion: 1` and four rows from the freeze table.
+
+3. **Frozen content values (E5M1-01 — kickoff adopted):**
+
+   | `AbilityDef.id` | `displayName` | `baseDamage` | `cooldownSeconds` | `abilityKind` |
+   |-----------------|---------------|--------------|-------------------|---------------|
+   | `prototype_pulse` | Prototype Pulse | 25 | 3.0 | `attack` |
+   | `prototype_burst` | Prototype Burst | 40 | 5.0 | `attack` |
+   | `prototype_guard` | Prototype Guard | 0 | 6.0 | `utility` |
+   | `prototype_dash` | Prototype Dash | 0 | 4.0 | `movement` |
+
+   **Rules:** Do **not** rename `id` values after ship — change `displayName` only, or add a new `id` in a follow-up issue. Relaxing the four-id CI gate requires a new Linear issue. **`prototype_pulse`** at 25 dmg × 4 casts = 100 HP dummy defeat (E5M1 backlog max HP default). **`prototype_pulse`** cooldown 3.0s matches current [`AbilityPrototypeCooldown.GlobalDuration`](../../server/NeonSprawl.Server/Game/AbilityInput/AbilityPrototypeCooldown.cs) until E5M1-07 switches to per-ability catalog cooldowns.
+
+4. **`validate_content.py`:**
+   - Add `ABILITY_SCHEMA`, `ABILITIES_DIR`; discover `content/abilities/*_abilities.json`.
+   - `_validate_ability_catalogs`: envelope `schemaVersion: 1`, top-level `abilities` array; validate each row against `ability-def.schema.json`; track `seen_ids`; reject duplicates across files.
+   - **`_prototype_e5m1_ability_gate`:** ids must equal `PROTOTYPE_E5M1_ABILITY_IDS` (frozenset of four ids above).
+   - Run ability validation after existing catalogs succeed (no cross-catalog refs in Slice 1).
+   - Require ability schema file in `main()` startup checks; extend module docstring + success summary with ability file + id counts.
+   - Keep `PROTOTYPE_E5M1_ABILITY_IDS` in sync with [E5.M1 freeze table](../decomposition/modules/E5_M1_CombatRulesEngine.md#prototype-slice-1-freeze-e5m1-01) and future NEO-77 server loader.
+
+5. **Docs:**
+   - `content/README.md` — add `abilities/` table row + E5 Slice 1 freeze paragraph.
+   - `E5_M1_CombatRulesEngine.md` — add **Prototype Slice 1 freeze (E5M1-01)** subsection with id + stat table + CI rules line.
+   - `CT_M1_ContentValidationPipeline.md` — ability catalog PR gate paragraph.
+   - `documentation_and_implementation_alignment.md` — E5.M1 row → **In Progress** / NEO-76 catalog landed.
+   - `E5M1-prototype-backlog.md` — E5M1-01 checkboxes when implementation completes.
+
+6. **No server/C#/client changes** in this story.
+
+## Files to add
+
+| Path | Purpose |
+|------|---------|
+| `content/schemas/ability-def.schema.json` | JSON Schema for a single `AbilityDef` row. |
+| `content/abilities/prototype_abilities.json` | Prototype four-ability catalog (`schemaVersion` + `abilities` array). |
+| `docs/plans/NEO-76-implementation-plan.md` | This plan. |
+
+## Files to modify
+
+| Path | Rationale |
+|------|-----------|
+| `scripts/validate_content.py` | Load/validate ability catalogs; duplicate `id`; E5M1 four-id gate; success summary. |
+| `content/README.md` | Document `content/abilities/`, schema path, E5 Slice 1 freeze (active catalog). |
+| `docs/decomposition/modules/E5_M1_CombatRulesEngine.md` | Freeze table + CI enforcement note; link to plan when complete. |
+| `docs/decomposition/modules/CT_M1_ContentValidationPipeline.md` | PR gate paragraph for ability catalog validation. |
+| `docs/decomposition/modules/documentation_and_implementation_alignment.md` | E5.M1 / NEO-76 status after catalog lands. |
+| `docs/plans/E5M1-prototype-backlog.md` | E5M1-01 checkboxes + landed note when complete. |
+
+## Tests
+
+| Item | Coverage |
+|------|----------|
+| **CI / PR gate** | `.github/workflows/pr-gate.yml` already runs `python scripts/validate_content.py` — extended script is the regression signal. |
+| **Manual negative cases** | From repo root after implementation: (1) duplicate ability `id` → non-zero exit; (2) remove one frozen id → gate error; (3) break schema (negative `baseDamage` or zero `cooldownSeconds`) → schema error; (4) empty `displayName` → schema error. |
+| **Manual happy path** | `pip install -r scripts/requirements-content.txt && python3 scripts/validate_content.py` — reports ability catalog + existing catalogs OK. |
+
+No dedicated pytest module in-repo today (same as NEO-50 / NEO-65).
+
+## Open questions / risks
+
+| Question / risk | Agent recommendation | Status |
+|-----------------|----------------------|--------|
+| **Catalog growth** | E5M1 gate requires **exactly** the four frozen ids; expanding the roster needs a follow-up issue to change `PROTOTYPE_E5M1_ABILITY_IDS`. | **adopted** |
+| **C# vs Python drift** | None until NEO-77; document “keep in sync” constant names in both places when server load lands (mirror NEO-66 / `PrototypeSlice3RecipeCatalogRules`). | **adopted** |
+| **Runtime still uses global 3s cooldown** | Expected — content lands before E5M1-07 wires per-ability `cooldownSeconds`; pulse 3.0s pre-aligns catalog with NEO-32 behavior. | **adopted** |
+| **Zero-damage guard/dash before E5M1-06** | Catalog values are forward-looking; cast accept path still has no damage until E5M1-07. Zero-damage rows support E5M1-06 unit tests. | **adopted** |
+
+None blocking.
--- a/docs/reviews/2026-05-24-NEO-76.md
+++ b/docs/reviews/2026-05-24-NEO-76.md
@ -0,0 +1,58 @@
+# Code review — NEO-76 prototype AbilityDef catalog + CI
+
+**Date:** 2026-05-24  
+**Scope:** Branch `NEO-76-e5m1-prototype-backlog` · commits `510d711`–`9b11a52` vs `origin/main`  
+**Base:** `origin/main`  
+**Follow-up:** Code review findings addressed — duplicate catalog row removed; module register table + E5.M1 status aligned.
+
+## Verdict
+
+**Approve with nits** — schema, `validate_content.py` gates, docs, and catalog now pass CI; ready for merge.
+
+## Summary
+
+The branch decomposes Epic 5 Slice 1 into the E5M1 backlog (NEO-76–NEO-86, NEO-44), adds kickoff + implementation plans, and lands content-only E5M1-01: `ability-def.schema.json`, `prototype_abilities.json`, and ability validation in `scripts/validate_content.py` following NEO-50/NEO-65 patterns. Documentation updates (E5.M1 freeze table, `content/README.md`, CT.M1, alignment register, epic backlog link) are thorough and match kickoff decisions. No server/C#/client code — appropriate for this story.
+
+## Documentation checked
+
+| Document | Result |
+|----------|--------|
+| [`docs/plans/NEO-76-implementation-plan.md`](../plans/NEO-76-implementation-plan.md) | **Matches** — kickoff table, schema shape, CI constant name, file list, and reconciliation AC complete; catalog passes duplicate-id validation. |
+| [`docs/plans/E5M1-prototype-backlog.md`](../plans/E5M1-prototype-backlog.md) · **E5M1-01** | **Matches** — E5M1-01 AC checked and landed note present; content passes CI. |
+| [`docs/decomposition/modules/E5_M1_CombatRulesEngine.md`](../decomposition/modules/E5_M1_CombatRulesEngine.md) | **Matches** — freeze table, Linear slug table, CI rules, and **Status** **In Progress** aligned with alignment register. |
+| [`docs/decomposition/modules/CT_M1_ContentValidationPipeline.md`](../decomposition/modules/CT_M1_ContentValidationPipeline.md) | **Matches** — ability catalog PR gate paragraph added. |
+| [`docs/decomposition/modules/documentation_and_implementation_alignment.md`](../decomposition/modules/documentation_and_implementation_alignment.md) | **Matches** — E5.M1 row added **In Progress** / NEO-76 landed. Register update appropriate when work starts. |
+| [`docs/decomposition/modules/module_dependency_register.md`](../decomposition/modules/module_dependency_register.md) | **Matches** — E5.M1 Linear note below Epic 5 table; E5.M2–E5.M4 rows render correctly; E5.M1 **In Progress**. |
+| [`docs/decomposition/epics/epic_05_pve_combat.md`](../decomposition/epics/epic_05_pve_combat.md) | **Matches** — Slice 1 backlog link to E5M1-prototype-backlog.md. |
+| [`content/README.md`](../../content/README.md) | **Matches** — `abilities/` row + E5 Slice 1 freeze paragraph. |
+| [`docs/decomposition/modules/client_server_authority.md`](../decomposition/modules/client_server_authority.md) | **N/A** — no runtime authority changes; content-only. |
+| Full-stack epic decomposition | **Matches** — E5M1-01 is **server/content** only; client counterparts **NEO-85** / **NEO-86** documented in backlog (not required for this issue). |
+
+## Blocking issues
+
+1. ~~**Duplicate `prototype_pulse` in `content/abilities/prototype_abilities.json`** — The catalog has **five** rows; `prototype_pulse` appears twice (lines 4–9 and 32–37). Running `python scripts/validate_content.py` exits non-zero with `duplicate ability id 'prototype_pulse'`. This violates E5M1-01 AC (“exactly four prototype ability ids; duplicate `id` fails CI”) and will fail `.github/workflows/pr-gate.yml`. Remove the trailing duplicate row so the file contains exactly the four frozen ids.~~ **Done.** Trailing duplicate row removed; `validate_content.py` reports **4 unique ability id(s)**.
+
+## Suggestions
+
+1. ~~**Fix `module_dependency_register.md` Epic 5 table layout** — The **E5.M1 note** paragraph sits between the E5.M1 and E5.M2 table rows, which breaks the markdown table. Move the note below the Epic 5 table (same pattern as other epic footnotes) so E5.M2–E5.M4 rows render in the table.~~ **Done.** Note moved below full Epic 5 table; E5.M1 status **In Progress**.
+
+2. ~~**Align E5.M1 module Status with alignment register** — [`documentation_and_implementation_alignment.md`](../decomposition/modules/documentation_and_implementation_alignment.md) lists E5.M1 as **In Progress**; [`E5_M1_CombatRulesEngine.md`](../decomposition/modules/E5_M1_CombatRulesEngine.md) summary **Status** still reads **Planned**. Mirror the E3.M* pattern (module page status note when catalog lands).~~ **Done.** E5.M1 module **Status** row updated to **In Progress** with NEO-76 landed note.
+
+## Nits
+
+- ~~Nit: Duplicate-id error message cites the same file twice (`… in content/abilities/prototype_abilities.json and content/abilities/prototype_abilities.json`) — acceptable; same-file duplicates are rare in normal authoring.~~ **Deferred** — acceptable per original review; no change.
+- ~~Nit: [`NEO-76-implementation-plan.md`](../plans/NEO-76-implementation-plan.md) reconciliation and backlog checkboxes are marked complete while CI currently fails — update after catalog fix or note “pending catalog fix” until green.~~ **Done.** Catalog fix makes reconciliation accurate; CI green.
+
+## Verification
+
+```bash
+# From repo root (venv recommended)
+python3 -m venv .venv-content && .venv-content/bin/pip install -r scripts/requirements-content.txt
+.venv-content/bin/python scripts/validate_content.py
+# Expect: content OK … 1 ability catalog file(s) … 4 unique ability id(s)
+
+# CI parity
+# pr-gate.yml runs the same script after pip install -r scripts/requirements-content.txt
+```
+
+Four unique ids match `PROTOTYPE_E5M1_ABILITY_IDS` and [`PrototypeAbilityRegistry`](../../server/NeonSprawl.Server/Game/AbilityInput/PrototypeAbilityRegistry.cs) allowlist (`prototype_pulse`, `prototype_guard`, `prototype_dash`, `prototype_burst`).
--- a/scripts/validate_content.py
+++ b/scripts/validate_content.py
@ -10,6 +10,7 @@ Validates:
 - resource node catalogs: content/resource-nodes/*_resource_nodes.json vs resource-node-def.schema.json (NEO-57)
 - resource yield catalogs: content/resource-nodes/*_resource_yields.json vs resource-yield-row.schema.json (NEO-57)
 - recipe catalogs: content/recipes/*_recipes.json rows vs content/schemas/recipe-def.schema.json (NEO-65)
+- ability catalogs: content/abilities/*_abilities.json rows vs content/schemas/ability-def.schema.json (NEO-76)
 """

 from __future__ import annotations
@ -30,11 +31,13 @@ RESOURCE_NODE_SCHEMA = REPO_ROOT / "content/schemas/resource-node-def.schema.jso
 RESOURCE_YIELD_ROW_SCHEMA = REPO_ROOT / "content/schemas/resource-yield-row.schema.json"
 RECIPE_IO_ROW_SCHEMA = REPO_ROOT / "content/schemas/recipe-io-row.schema.json"
 RECIPE_SCHEMA = REPO_ROOT / "content/schemas/recipe-def.schema.json"
+ABILITY_SCHEMA = REPO_ROOT / "content/schemas/ability-def.schema.json"
 SKILLS_DIR = REPO_ROOT / "content/skills"
 MASTERY_DIR = REPO_ROOT / "content/mastery"
 ITEMS_DIR = REPO_ROOT / "content/items"
 RESOURCE_NODES_DIR = REPO_ROOT / "content/resource-nodes"
 RECIPES_DIR = REPO_ROOT / "content/recipes"
+ABILITIES_DIR = REPO_ROOT / "content/abilities"

 # Slice 1 prototype lock (NEO-33): exact ids + category coverage after schema passes.
 PROTOTYPE_SLICE1_SKILL_IDS = frozenset({"salvage", "refine", "intrusion"})
@ -88,6 +91,17 @@ PROTOTYPE_SLICE3_RECIPE_IDS = frozenset(
 )
 PROTOTYPE_SLICE3_REFINE_SKILL_ID = "refine"

+# Epic 5 Slice 1 prototype lock (NEO-76): exact ability ids after schema passes.
+# Keep in sync with E5.M1 freeze table and future NEO-77 server loader.
+PROTOTYPE_E5M1_ABILITY_IDS = frozenset(
+    {
+        "prototype_pulse",
+        "prototype_guard",
+        "prototype_dash",
+        "prototype_burst",
+    }
+)
+

 def _prototype_slice1_gate(seen_ids: dict[str, str], id_to_category: dict[str, str]) -> str | None:
    """Return a human-readable error if Slice 1 contract fails, else None."""
@ -397,6 +411,64 @@ def _validate_item_catalogs(
    return errors, seen_ids, id_to_role, id_to_slot_kind, id_to_stack_max


+def _validate_ability_catalogs(
+    *,
+    ability_files: list[Path],
+    ability_validator: Draft202012Validator,
+) -> tuple[int, dict[str, str]]:
+    """Validate ability JSON files. Returns (error_count, seen_ids)."""
+    errors = 0
+    seen_ids: dict[str, str] = {}
+
+    for path in ability_files:
+        rel = str(path.relative_to(REPO_ROOT))
+        data = json.loads(path.read_text(encoding="utf-8"))
+        schema_version = data.get("schemaVersion")
+        if schema_version != 1:
+            print(f"error: {rel}: expected schemaVersion 1, got {schema_version!r}", file=sys.stderr)
+            errors += 1
+            continue
+
+        abilities = data.get("abilities")
+        if not isinstance(abilities, list):
+            print(f"error: {rel}: expected top-level 'abilities' array", file=sys.stderr)
+            errors += 1
+            continue
+
+        for i, row in enumerate(abilities):
+            if not isinstance(row, dict):
+                print(f"error: {rel}: abilities[{i}] must be an object", file=sys.stderr)
+                errors += 1
+                continue
+            row_schema_errors = 0
+            for err in sorted(ability_validator.iter_errors(row), key=lambda e: e.path):
+                loc = ".".join(str(p) for p in err.path) or "(root)"
+                print(f"error: {rel} abilities[{i}] {loc}: {err.message}", file=sys.stderr)
+                row_schema_errors += 1
+                errors += 1
+            aid = row.get("id")
+            if isinstance(aid, str) and row_schema_errors == 0:
+                prev = seen_ids.get(aid)
+                if prev:
+                    print(f"error: duplicate ability id {aid!r} in {prev} and {rel}", file=sys.stderr)
+                    errors += 1
+                else:
+                    seen_ids[aid] = rel
+
+    return errors, seen_ids
+
+
+def _prototype_e5m1_ability_gate(seen_ids: dict[str, str]) -> str | None:
+    """Return a human-readable error if E5M1 ability contract fails, else None."""
+    ids = frozenset(seen_ids.keys())
+    if ids != PROTOTYPE_E5M1_ABILITY_IDS:
+        return (
+            "error: prototype E5M1 expects exactly ability ids "
+            f"{sorted(PROTOTYPE_E5M1_ABILITY_IDS)!r}, got {sorted(ids)!r}"
+        )
+    return None
+
+
 def _prototype_slice4_gate(track_skill_ids: list[str]) -> str | None:
    """Return a human-readable error if Slice 4 contract fails, else None."""
    if len(track_skill_ids) != 1:
@ -717,6 +789,9 @@ def main() -> int:
    if not RECIPE_SCHEMA.is_file():
        print(f"error: missing schema {RECIPE_SCHEMA}", file=sys.stderr)
        return 1
+    if not ABILITY_SCHEMA.is_file():
+        print(f"error: missing schema {ABILITY_SCHEMA}", file=sys.stderr)
+        return 1

    skill_schema = json.loads(SKILL_SCHEMA.read_text(encoding="utf-8"))
    skill_validator = Draft202012Validator(skill_schema)
@ -731,6 +806,8 @@ def main() -> int:
    resource_yield_schema = json.loads(RESOURCE_YIELD_ROW_SCHEMA.read_text(encoding="utf-8"))
    resource_yield_validator = Draft202012Validator(resource_yield_schema)
    recipe_validator = _recipe_def_validator()
+    ability_schema = json.loads(ABILITY_SCHEMA.read_text(encoding="utf-8"))
+    ability_validator = Draft202012Validator(ability_schema)

    if not SKILLS_DIR.is_dir():
        print(f"error: missing directory {SKILLS_DIR}", file=sys.stderr)
@ -787,6 +864,15 @@ def main() -> int:
        print(f"error: no *_recipes.json files under {RECIPES_DIR}", file=sys.stderr)
        return 1

+    if not ABILITIES_DIR.is_dir():
+        print(f"error: missing directory {ABILITIES_DIR}", file=sys.stderr)
+        return 1
+
+    ability_files = sorted(ABILITIES_DIR.glob("*_abilities.json"))
+    if not ability_files:
+        print(f"error: no *_abilities.json files under {ABILITIES_DIR}", file=sys.stderr)
+        return 1
+
    seen_ids: dict[str, str] = {}
    id_to_category: dict[str, str] = {}
    errors = 0
@ -975,6 +1061,19 @@ def main() -> int:
        print(slice3_recipe_err, file=sys.stderr)
        return 1

+    ability_errors, ability_seen_ids = _validate_ability_catalogs(
+        ability_files=ability_files,
+        ability_validator=ability_validator,
+    )
+    if ability_errors:
+        print(f"content validation failed with {ability_errors} error(s)", file=sys.stderr)
+        return 1
+
+    e5m1_ability_err = _prototype_e5m1_ability_gate(ability_seen_ids)
+    if e5m1_ability_err:
+        print(e5m1_ability_err, file=sys.stderr)
+        return 1
+
    print(
        "content OK: "
        f"{len(skill_files)} skill catalog file(s), "
@ -984,10 +1083,12 @@ def main() -> int:
        f"{len(node_files)} resource node catalog file(s), "
        f"{len(yield_files)} resource yield catalog file(s), "
        f"{len(recipe_files)} recipe catalog file(s), "
+        f"{len(ability_files)} ability catalog file(s), "
        f"{len(seen_ids)} unique skill id(s), "
        f"{len(item_seen_ids)} unique item id(s), "
        f"{len(node_seen_ids)} unique nodeDefId(s), "
        f"{len(recipe_seen_ids)} unique recipe id(s), "
+        f"{len(ability_seen_ids)} unique ability id(s), "
        f"{len(track_skill_ids)} mastery track(s)"
    )
    return 0