neon-sprawl/docs/plans/NEO-149-implementation-plan.md

NEO-149 — E7M4-06: ContractCompletionOperations + encounter wiring

Linear: NEO-149
Branch: NEO-149-e7m4-06-contract-completion-encounter-wiring
Backlog: E7M4-pre-production-backlog.md — E7M4-06
Module: E7_M4_ContractMissionGenerator.md
Pattern: NEO-128-implementation-plan.md — deliver-then-mark + idempotent replay; NEO-147-implementation-plan.md — ContractGeneratorOperations orchestrator shape; NEO-148-implementation-plan.md — TryDeliverContractCompletion + outcome audit split
Precursors: NEO-147 Done — ContractGeneratorOperations.TryIssue; NEO-148 Done — RewardRouterOperations.TryDeliverContractCompletion
Blocks: NEO-151 (E7M4-08 HTTP contract projections + Bruno issue/clear loop)
Client counterpart: NEO-153, NEO-154 (blocked by E7M4-08; no Godot work in this story)

Goal

Encounter clear completes a matching active contract instance and triggers the template completionRewardBundle payout. First-time encounter loot (E5.M3) remains unchanged and runs before contract payout.

Kickoff clarifications

No blocking decisions needed. Linear AC, E7M4-06 backlog scope, E7M4 kickoff decisions table, and landed NEO-128/NEO-147/NEO-148 code settle:

Topic	Decision	Evidence
Grant order vs encounter loot	Encounter loot first, contract payout second — contract wiring runs only after TryCompleteAndGrant commits encounter grants + completion mark	Backlog E7M4-06 in-scope wiring note; EncounterCompletionOperations already applies reward-table grants before downstream hooks
Deliver-then-mark	TryDeliverContractCompletion then IContractInstanceStore.TryMarkComplete; on delivery deny, instance stays active	NEO-128 quest precedent; README reward router § contract wiring note
Outcome audit	IContractOutcomeStore.TryAppend after successful delivery + mark; grant snapshots from RewardDeliveryResult / RewardDeliveryEvent	NEO-146 open-questions table; outcome store requires existing instance row
Encounter template match	Compare cleared encounterId to template encounterTemplateId on the player's active instance	Backlog “match encounterTemplateId”; prototype binds prototype_combat_pocket
No active / wrong encounter	Structured no-op success — do not fail encounter completion	Mirror quest wiring best-effort; encounter already committed
Idempotent replay	When instance already completed, return success without re-delivering (router already_delivered path if invoked)	NEO-128 + store TryMarkComplete replay semantics
Wiring call site	EncounterCompletionOperations.TryCompleteAndGrant after QuestObjectiveWiring.TryProcessEncounterCompleteSuccess	Same hook point as quest credit; EncounterCombatWiring unchanged except extended dependency pass-through
Best-effort	Contract deny does not roll back encounter loot or completion mark	Encounter grants committed before contract hook; quest wiring precedent
Bruno smoke (issue → clear → GET)	Deferred to NEO-151 — no contract HTTP routes yet	E7M4-08 scope; this story covers orchestrator + encounter wiring + integration tests
Contract fixture reset	Add contract delivery TryClear helper for Bruno/dev loops (NEO-148 deferred item)	NEO-148 plan open questions
Telemetry	Comment-only contract_complete hook in orchestrator — E7M4-09 / NEO-152	Backlog E7M4-09

Scope and out-of-scope

In scope (from Linear + backlog):

• ContractCompletionOperations.TryCompleteOnEncounterClear static orchestrator in Game/Contracts/.
• ContractCompletionReasonCodes + ContractCompletionOperationResult envelope.
• Wire from EncounterCompletionOperations success path (after encounter loot + quest wiring).
• Pass contract dependencies through EncounterCombatWiring → AbilityCastApi (mirror quest store injection).
• Flow: resolve active instance → match encounter → deliver bundle → mark instance completed → append ContractOutcomeRow.
• Integration tests: issue → encounter clear → instance completed + delivery row + outcome row; clear without contract unchanged; wrong encounter no-op; encounter first-time loot idempotency unchanged.
• Extend QuestFixtureOperations (or adjacent dev fixture) with contract delivery TryClear for test/Bruno reset loops.
• server/README.md contract completion operations section; E7.M4 module anchor.

Out of scope (from Linear + backlog):

• HTTP POST …/contracts/issue, contract GET projections (NEO-151 / E7M4-08).
• Bruno smoke requiring HTTP (NEO-151).
• ContractEconomyValidation at issue (NEO-150 / E7M4-07).
• Godot HUD (NEO-153 / NEO-154).
• E9.M1 telemetry ingest (comment-only hook sites optional).

Client counterpart: NEO-153, NEO-154 — server HTTP must land in NEO-151 first.

Acceptance criteria checklist

• Active contract completes when bound encounter clears.
• Encounter first-time loot idempotency unchanged (E5.M3).

Implementation reconciliation (shipped)

• Types: ContractCompletionReasonCodes, ContractCompletionOperationResult.
• Orchestrator: ContractCompletionOperations.TryCompleteOnEncounterClear — deliver-then-mark, outcome append, no-op on mismatch/no active.
• Wiring: EncounterCompletionOperations → contract hook after quest wiring; EncounterCombatWiring / AbilityCastApi pass contract DI.
• Fixture: QuestFixtureRequest.resetContractInstanceIds clears instance + delivery + outcome rows.
• Tests: 5 unit + 1 integration + 1 encounter wiring test; full suite 904 tests green.
• Docs: server/README.md contract completion section; E7.M4 module anchor.

Technical approach

1. Types (Game/Contracts/)

Type	Role
ContractCompletionReasonCodes	Stable codes: no_active_contract, encounter_mismatch, unknown_template, player_not_writable, invalid_ids; passthrough router codes on delivery deny (e.g. inventory_full, already_delivered)
ContractCompletionOperationResult	success, optional reasonCode, optional ContractInstanceState snapshot, optional ContractOutcomeRow

2. ContractCompletionOperations.TryCompleteOnEncounterClear

Inputs: playerId, encounterId, injected IContractInstanceStore, IContractOutcomeStore, IContractTemplateRegistry, reward-router dependencies (same set as QuestStateOperations.TryMarkComplete), TimeProvider.

Flow:

1. Normalize playerId + encounterId; deny invalid_ids when empty.
2. instanceStore.TryGetActiveForPlayer — no active row ⇒ success no-op (no_active_contract, or null reason for silent no-op — prefer explicit reason in tests, null in wiring if best-effort silent).
3. Load template via templateRegistry.TryGetDefinition(active.TemplateId); deny unknown_template when missing.
4. Normalize template encounterTemplateId vs cleared encounterId — mismatch ⇒ success no-op (encounter_mismatch).
5. If active snapshot status is already completed (defensive) ⇒ idempotent success.
6. RewardRouterOperations.TryDeliverContractCompletion with template CompletionRewardBundle.
7. On delivery deny ⇒ return deny with router reasonCode; instance stays active.
8. instanceStore.TryMarkComplete with timeProvider.GetUtcNow(); handle store replay idempotency (completed snapshot ⇒ success).
9. Build ContractOutcomeRow from delivery grants + ContractOutcomeIds.MakeIdempotencyKey; outcomeStore.TryAppend (best-effort if duplicate idempotency key after race — treat as success when instance already completed).
10. Comment-only contract_complete telemetry hook site (NEO-152).

No-op vs deny: Structural preconditions that mean “this encounter clear is not a contract objective” (no active, encounter mismatch) return success: true so encounter completion is never blocked. Delivery/store failures return success: false.

3. Encounter wiring

In EncounterCompletionOperations.TryCompleteAndGrant, after encounter event record + QuestObjectiveWiring.TryProcessEncounterCompleteSuccess, call:

ContractCompletionOperations.TryCompleteOnEncounterClear(
    normalizedPlayerId,
    normalizedEncounterId,
    /* contract + router deps */);

Extend EncounterCombatWiring.TryProcessCastOutcome and AbilityCastApi to resolve and pass:

• IContractInstanceStore
• IContractOutcomeStore
• IContractTemplateRegistry

(Mirror existing quest registry / progress store injection.)

4. Dev fixture reset (NEO-148 follow-on)

Extend QuestFixtureOperations reset body (or parallel contract fixture helper) to clear contract delivery rows via IRewardDeliveryStore.TryClear(playerId, RewardDeliverySourceKinds.ContractCompletion, contractInstanceId) when resetting contract test state — enables future Bruno loops in NEO-151.

5. Documentation

• server/README.md: new Contract completion operations (NEO-149) section — orchestrator flow, reason codes, deliver-then-mark, outcome append, encounter wiring order.
• Update E7_M4_ContractMissionGenerator.md Slice 4 anchor when shipped.

Files to add

Path	Purpose
server/NeonSprawl.Server/Game/Contracts/ContractCompletionReasonCodes.cs	Stable deny / no-op reason codes
server/NeonSprawl.Server/Game/Contracts/ContractCompletionOperationResult.cs	Orchestrator result envelope
server/NeonSprawl.Server/Game/Contracts/ContractCompletionOperations.cs	TryCompleteOnEncounterClear orchestrator
server/NeonSprawl.Server.Tests/Game/Contracts/ContractCompletionOperationsTests.cs	Unit tests — match/mismatch, deliver-then-mark, idempotent replay, delivery deny leaves active
server/NeonSprawl.Server.Tests/Game/Contracts/ContractCompletionOperationsIntegrationTests.cs	DI path: issue → encounter complete → completed instance + delivery + outcome

Files to modify

Path	Rationale
server/NeonSprawl.Server/Game/Encounters/EncounterCompletionOperations.cs	Call contract completion after quest wiring on successful encounter grant
server/NeonSprawl.Server/Game/Encounters/EncounterCombatWiring.cs	Pass contract store/registry deps to TryCompleteAndGrant
server/NeonSprawl.Server/Game/AbilityInput/AbilityCastApi.cs	Resolve contract DI services for combat wiring
server/NeonSprawl.Server.Tests/Game/Encounters/EncounterCompletionOperationsTests.cs	Update dependency resolution + assert encounter loot unchanged when contract completes
server/NeonSprawl.Server.Tests/Game/Encounters/EncounterCombatWiringTests.cs	Pass contract deps; optional end-to-end issue → cast → contract completed
server/NeonSprawl.Server/Game/Quests/QuestFixtureOperations.cs	Contract delivery TryClear on fixture reset (NEO-148 deferred)
server/README.md	Contract completion operations + wiring order docs
docs/decomposition/modules/E7_M4_ContractMissionGenerator.md	NEO-149 completion wiring anchor when shipped

Tests

File	Coverage
ContractCompletionOperationsTests.cs	TryCompleteOnEncounterClear_ShouldCompleteAndDeliver_WhenActiveInstanceMatchesEncounter — issue via generator helper, complete on prototype_combat_pocket, assert completed, delivery store row, outcome row, bundle grants
Same	TryCompleteOnEncounterClear_ShouldNoOp_WhenNoActiveContract — encounter clear succeeds structurally; no delivery row
Same	TryCompleteOnEncounterClear_ShouldNoOp_WhenEncounterMismatch — active contract bound to combat pocket; clear different encounter id ⇒ still active
Same	TryCompleteOnEncounterClear_ShouldLeaveActive_WhenDeliveryDenies — full inventory / deny path; instance stays active, no outcome row
Same	TryCompleteOnEncounterClear_ShouldBeIdempotent_WhenReplayed — second call after complete returns success without double grant
ContractCompletionOperationsIntegrationTests.cs	Full DI: TryIssue → TryCompleteAndGrant → stores consistent via InMemoryWebApplicationFactory
EncounterCompletionOperationsTests.cs	TryCompleteAndGrant_ShouldGrantPrototypeLootOnce_WhenAllTargetsDefeated still passes with contract deps wired; add case with active contract asserting both encounter loot (×10 scrap + token) and contract bundle (×5 scrap + salvage XP)
EncounterCombatWiringTests.cs	Update all TryProcessCastOutcome call sites with contract deps (compile fix)

All new tests follow AAA with // Arrange / // Act / // Assert labels per csharp-style.

Manual Godot QA: none (server engine; capstone NEO-154). Bruno HTTP loop: NEO-151.

Open questions / risks

Question / risk	Agent recommendation	Status
Contract issued after encounter already cleared	Prototype flow is issue-then-clear; edge case leaves contract active until player can re-trigger (not possible in v1) — document in README; no v1 fix	adopted
Outcome append fails after mark complete	Treat duplicate idempotency append as success when instance completed; log at debug if needed	adopted
Large signature growth on encounter completion	Accept for prototype — mirror quest deps already on TryCompleteAndGrant; refactor to context object only if a follow-on story demands	deferred
Bruno smoke in backlog vs no HTTP	Integration tests + fixture reset in this story; Bruno issue → clear → GET in NEO-151	adopted
**contract_complete telemetry	Comment-only hook in orchestrator; NEO-152 fills payload	deferred

Client counterpart

NEO-153 — contract panel after E7M4-08 HTTP. NEO-154 — Godot capstone. This story is server-only; Bruno verification of the full player loop lands with NEO-151.