# NEO-86 — Implementation plan

## Story reference

| Field | Value |
|--------|--------|
| **Key** | NEO-86 |
| **Title** | E5M1-12: Playable tab-target combat capstone (Godot) |
| **Linear** | https://linear.app/neon-sprawl/issue/NEO-86/e5m1-12-playable-tab-target-combat-capstone-godot |
| **Module** | [E5.M1 — CombatRulesEngine](../decomposition/modules/E5_M1_CombatRulesEngine.md) · Epic 5 Slice 1 · backlog **E5M1-12** |
| **Branch** | `NEO-86-playable-combat-capstone` |
| **Server deps** | [NEO-82](https://linear.app/neon-sprawl/issue/NEO-82) cast + `combatResolution` (**Done**); [NEO-83](https://linear.app/neon-sprawl/issue/NEO-83) combat-targets GET (**Done**); [NEO-44](https://linear.app/neon-sprawl/issue/NEO-44) gig XP on defeat + GET (**Done**) |
| **Client deps** | [NEO-85](https://linear.app/neon-sprawl/issue/NEO-85) combat feedback + target HP HUD (**Done**); E1.M4 cast funnel (NEO-28/31/32) (**Done**) |
| **Pattern** | Capstone integration — [NEO-75](https://linear.app/neon-sprawl/issue/NEO-75) docs + manual QA primary; minimal client gap-fill for gig visibility |
| **Server counterpart** | NEO-44 gig progression GET; Bruno-only verification is not prototype-complete per [full-stack epic decomposition](../../.cursor/rules/full-stack-epic-decomposition.md) |

## Kickoff clarifications

| Topic | Question | Agent recommendation | Answer |
|--------|----------|----------------------|--------|
| **Gig XP visibility** | Include gig XP in the Godot capstone? | **`GigProgressionClient` + `GigXpLabel`** in economy HUD; refresh after defeat cast — NEO-44 landed; NEO-75 capstone is Godot-only (no Bruno/curl). | **User:** Godot gig label + client. |
| **Implementation scope** | Docs-only vs client code? | **Docs + manual QA primary**; add gig client wiring; fix integration gaps only if capstone QA fails on `main`. | **User:** docs-first; code for gig row or QA failures. |
| **Session baseline** | Fresh server vs fixture POST only? | **Fresh server restart** before Godot **F5** — resets in-memory dummy HP + gig XP baseline (NEO-75 / NEO-44 manual QA precedent). | **Adopted** (kickoff default). |

No other blocking decisions — combat loop HUD, hotbar pulse bootstrap, and event-driven combat-target refresh are landed in NEO-85; field names follow NEO-82 / NEO-44 server vocabulary.

## Goal, scope, and out-of-scope

**Goal:** Prove Epic 5 Slice 1 acceptance **in Godot**: tab-target lock, cast abilities, readable deny reasons, defeat **`prototype_target_alpha`**, and visible gig XP after defeat — without Bruno.

**In scope (from Linear + [E5M1-12](E5M1-prototype-backlog.md#e5m1-12--playable-tab-target-combat-capstone-godot)):**

- **`docs/manual-qa/NEO-86.md`**: numbered **single-session** capstone script — fresh dev player, Tab lock alpha, digit cast **`prototype_pulse`** until defeat, verify combat HUD + **`breach`** gig XP — **no Bruno/curl** steps.
- **`client/README.md`**: **End-to-end combat loop** section — integration checklist (boot → Tab lock → cast → defeat → gig XP refresh chain); cross-links NEO-23/28/31/85.
- **`GigProgressionClient`** + **`GigXpLabel`** — mirror **`SkillProgressionClient`** (NEO-37); boot hydrate + refresh when cast accept carries **`targetDefeated: true`**.
- **Module alignment** (on story completion): update [`documentation_and_implementation_alignment.md`](../decomposition/modules/documentation_and_implementation_alignment.md) E5.M1 row + E5M1-12 backlog checkboxes; note Epic 5 Slice 1 client capstone complete.
- **Integration fixes only if capstone QA fails** on current `main` wiring (unexpected deny, refresh gap, etc.).

**Out of scope (from Linear + backlog):**

- NPC AI (E5.M2), encounters/loot (E5.M3), group scaling.
- Final combat VFX, floating damage numbers, player HP bar.
- Full nine-gig catalog, hub swap, gig level curves.
- Bruno-only verification as prototype-complete proof.

## Acceptance criteria checklist

- [x] Human completes **`docs/manual-qa/NEO-86.md`** with server + client; **`prototype_target_alpha`** shows defeated state in HUD.
- [x] Epic 5 Slice 1 AC: combat readable in fixed isometric camera; no silent cast failures on deny.
- [x] **`breach`** gig XP visible in Godot after defeat (≥ **25** from fresh-server baseline).
- [x] Re-read [epic_05 Definition of Done](../decomposition/epics/epic_05_pve_combat.md#epic-5-definition-of-done) for prototype minimums.

## Implementation reconciliation (shipped)

- **Client:** `gig_progression_client.gd` GET snapshot + **`gig_row`**; **`GigXpLabel`** under economy HUD; defeat-triggered refresh in **`_on_cast_result_received`**.
- **Tests:** `gig_progression_client_test.gd`, `gig_feedback_refresh_test.gd` (5 cases pass).
- **Docs:** [`NEO-86` manual QA](../manual-qa/NEO-86.md); `client/README.md` end-to-end combat loop section; E5M1 backlog + module alignment rows updated.
- **Integration:** No capstone QA gaps on `main` beyond gig client wiring.

## Technical approach

### 1. Capstone manual QA script (`docs/manual-qa/NEO-86.md`)

**Preconditions:** Stop any running server; start fresh (`dotnet run`) so in-memory **`dev-local-1`** dummy HP and gig XP reset. Godot **F5** with **no** prior curl/Bruno seeding.

**Combat math** (from NEO-85 / NEO-82):

| Cast # | Expected cast feedback | Target HP label |
|--------|------------------------|-----------------|
| 1 | `Cast: 25 dmg → 75 HP` | `100/100` → `75/100` |
| 2 | `→ 50 HP` | `50/100` |
| 3 | `→ 25 HP` | `25/100` |
| 4 | `→ 0 HP — defeated!` | `0/100 (defeated)` |
| 5 | `ability_cast_denied: target_defeated` | unchanged defeated |

**Checklist outline:**

1. Start server + client; confirm **`Gig XP:`** row shows **`breach`** at **0** xp (boot hydrate).
2. Walk to orange **Dummy α** near spawn; **Tab** lock **`prototype_target_alpha`** — dummy brightens; **`CombatTargetHpLabel`** shows **`100/100`**.
3. Press **1** four times (respect ~3s pulse cooldown); verify **`CastFeedbackLabel`** + HP label step as above.
4. Verify **`GigXpLabel`** shows **`breach`** **`xp` 25** after lethal hit (event-driven GET refresh).
5. Press **1** again — deny feedback; gig XP unchanged.
6. **Esc** clear lock — HP label **`— (no lock)`**; combat feedback labels remain readable.
7. Regression spot-check: cast without lock → **`invalid_target`** deny on **`CastFeedbackLabel`**.

Document optional **`POST /game/__dev/combat-targets-fixture`** for mid-session dummy-only reset (NEO-85) — capstone baseline still prefers **server restart**.

### 2. Gig progression client (`gig_progression_client.gd`)

Mirror **`skill_progression_client.gd`**:

- **`GET {base}/game/players/{id}/gig-progression`** — injectable HTTP, **`_busy`** guard.
- **`parse_progression_json(text)`** static — require **`schemaVersion` 1**, **`mainGigId`**, **`gigs`** array.
- Signals: **`progression_received(snapshot: Dictionary)`**, **`progression_sync_failed(reason: String)`**.
- **`gig_row(gig_id: String, snapshot: Dictionary = {}) -> Dictionary`** — lookup by **`id`**; uses cached snapshot when second arg omitted.

### 3. Gig XP HUD (`main.gd` + `main.tscn`)

- Add **`GigProgressionClient`** node (scene or runtime like **`CombatTargetsClient`**).
- Add **`GigXpLabel`** under **`UICanvas/EconomyHudSection/Body/`** below **`SkillProgressionLabel`**, above **`CraftRecipePanel`** — respects NEO-75 collapse toggle.
- **`_render_gig_xp_label()`** — format **`Gig XP:\nbreach: L1 · 25 xp`** (prototype fixed level **1** from server); **`Loading…`** / error lines match skill label pattern.
- **Refresh triggers (event-driven):**
  - Boot: **`request_sync_from_server()`** in setup (parallel to skill progression).
  - **`cast_result_received`** when **`accepted`** and **`resolution.targetDefeated === true`** → gig progression sync (NEO-44 grant is server-side on that accept; GET reconciles HUD).
- Do **not** refresh gig XP on every cast accept — only boot + defeat transition (minimize HTTP chatter).

### 4. README integration checklist

New **`## End-to-end combat loop (NEO-86)`** section after NEO-85 combat HUD subsection:

- Flow in prose: boot hotbar sync (auto pulse bind) → **Tab** lock dummy → digit cast → cast feedback + HP label refresh → defeat → gig XP refresh.
- Cross-links: NEO-23 (targeting), NEO-28/31 (cast), NEO-85 (combat HUD), NEO-44 (server gig grant).
- Pointer to **`docs/manual-qa/NEO-86.md`** as authoritative capstone script.
- Note **`Economy HUD`** toggle hides gig row with other economy labels.

### 5. Module alignment (implementation batch or story end)

When acceptance criteria pass:

- **`documentation_and_implementation_alignment.md`**: E5.M1 — note **NEO-86 landed**, Epic 5 Slice 1 client capstone complete.
- **`E5M1-prototype-backlog.md`**: E5M1-12 checkboxes + landed note.
- **`E5_M1_CombatRulesEngine.md`**: E5M1-12 row if not already marked.

### 6. Integration fixes (conditional)

Run capstone QA on **`main`** wiring before gig client work; if any step fails, fix minimal **`main.gd`** / client bug in this branch and note in plan **Decisions**. Expected path: gig client + docs only.

## Files to add

| Path | Purpose |
|------|---------|
| `docs/plans/NEO-86-implementation-plan.md` | This plan. |
| `docs/manual-qa/NEO-86.md` | Capstone single-session manual QA (zero Bruno/curl). |
| `client/scripts/gig_progression_client.gd` | GET gig-progression snapshot; parse v1; **`gig_row`** helper. |
| `client/scripts/gig_progression_client.gd.uid` | Godot uid companion (tracked). |
| `client/test/gig_progression_client_test.gd` | GdUnit: parse snapshot; **`gig_row("breach")`**; HTTP error path. AAA layout. |
| `client/test/gig_feedback_refresh_test.gd` | GdUnit: cast accept with **`targetDefeated`** triggers gig sync (spy harness). AAA layout. |

## Files to modify

| Path | Rationale |
|------|-----------|
| `client/scripts/main.gd` | Wire **`GigProgressionClient`**; **`_render_gig_xp_label`**; defeat-triggered gig refresh in **`_on_cast_result_received`**. |
| `client/scenes/main.tscn` | Add **`GigProgressionClient`** node + **`GigXpLabel`** under economy HUD body. |
| `client/README.md` | End-to-end combat loop section; gig XP row docs; capstone manual QA link. |
| `docs/decomposition/modules/documentation_and_implementation_alignment.md` | E5.M1 row — NEO-86 landed + Slice 1 client capstone complete (on story completion). |
| `docs/plans/E5M1-prototype-backlog.md` | E5M1-12 acceptance checkboxes + landed note (on story completion). |

## Tests

| Path | Change |
|------|--------|
| `client/test/gig_progression_client_test.gd` | **Add:** GET parse v1 with **`breach`** row; invalid schema → failure signal; 404 path. |
| `client/test/gig_feedback_refresh_test.gd` | **Add:** cast accept with **`targetDefeated: true`** triggers sync; non-defeat accept and deny do not. |

**Manual verification:** [`docs/manual-qa/NEO-86.md`](manual-qa/NEO-86.md) — server + Godot; full defeat spine + gig XP visibility without curl.

## Open questions / risks

| Question or risk | Agent recommendation | Status |
|------------------|----------------------|--------|
| **Gig refresh on every accept** | Refresh only on **`targetDefeated`** + boot — avoids redundant GETs on non-lethal hits. | **adopted** |
| **Gig label inside economy collapse** | Place under **`EconomyHudSection/Body`** — hidden when economy HUD collapsed (NEO-75); combat labels stay visible. | **adopted** |
| **Overlap with NEO-85 manual QA** | NEO-86 supersedes as capstone script; keep NEO-85 as component-level regression reference. | **adopted** |
| **Postgres dev DB retains gig XP** | Capstone preconditions require **server restart**; document that shared Postgres may show prior totals. | **adopted** |
| **Integration gap on `main`** | Run capstone dry-run first; fix only if QA fails. | **adopted** — no logic gaps beyond gig client |