feat(memory): implement stability stage

Co-authored-by: multica-agent <github@multica.ai>

apps/web/server/api/v1/campaigns/[id]/characters/[characterId].patch.ts

@@ -0,0 +1,40 @@
+import { z } from 'zod'
+import {
+  requireCampaignAccess,
+  requireStageTwoSafeText,
+  requireStageTwoUser,
+  stageTwoApiError,
+  stageTwoRpc,
+  stageTwoUuid,
+} from '~/server/utils/stage-two-supabase'
+
+const BodySchema = z.object({
+  hp: z.number().int().min(0).optional(),
+  inventory: z.array(z.string().trim().min(1).max(120)).max(50).optional(),
+  statuses: z.array(z.string().trim().min(1).max(80)).max(12).optional(),
+  reason: z.string().trim().min(3).max(500),
+}).strict().refine(body => body.hp !== undefined || body.inventory !== undefined || body.statuses !== undefined, {
+  message: 'At least one state field is required.',
+})
+
+export default defineEventHandler(async (event) => {
+  try {
+    const user = await requireStageTwoUser(event)
+    const campaignId = stageTwoUuid(getRouterParam(event, 'id'), 'campaign id')
+    const characterId = stageTwoUuid(getRouterParam(event, 'characterId'), 'character id')
+    await requireCampaignAccess(campaignId, user.id, true)
+    const body = BodySchema.parse(await readBody(event))
+    requireStageTwoSafeText([body.reason, ...(body.inventory ?? []), ...(body.statuses ?? [])].join('\n'))
+    const { reason, ...patch } = body
+    const state = await stageTwoRpc<Record<string, unknown>>('stage_six_adjust_character_state', {
+      p_campaign_id: campaignId,
+      p_owner_id: user.id,
+      p_character_id: characterId,
+      p_patch: patch,
+      p_reason: reason,
+    })
+    return { characterId, state }
+  } catch (error) {
+    stageTwoApiError(error)
+  }
+})

apps/web/server/api/v1/campaigns/[id]/characters/suggest.post.ts

@@ -5,6 +5,8 @@ import {
   requireCampaignAccess,
   requireStageTwoSafeText,
   requireStageTwoUser,
+  stageSixConsumeAiQuota,
+  stageSixRecordAiUsage,
   stageTwoApiError,
   stageTwoDatabase,
   stageTwoUuid,
@@ -48,8 +50,10 @@ export default defineEventHandler(async (event) => {
       jsonSchema: CharacterDraftSchema.toJSONSchema(),
     })
 
+    await stageSixConsumeAiQuota(user.id, campaignId, 'character-draft')
     const controller = new AbortController()
     const timeout = setTimeout(() => controller.abort(), 30_000)
+    const startedAt = Date.now()
     let response: Response
     try {
       response = await fetch(completion.endpoint, {
@@ -62,10 +66,14 @@ export default defineEventHandler(async (event) => {
       clearTimeout(timeout)
     }
     if (!response.ok) throw createError({ statusCode: 502, statusMessage: 'The character coauthor is temporarily unavailable.' })
+    const payload = await response.json()
+    await stageSixRecordAiUsage({
+      userId: user.id, campaignId, requestKind: 'character-draft', completion, payload, latencyMs: Date.now() - startedAt,
+    }).catch(error => console.error('[web] could not record character draft usage:', error))
 
     let character
     try {
-      character = CharacterDraftSchema.parse(parseJsonCompletion(await response.json()))
+      character = CharacterDraftSchema.parse(parseJsonCompletion(payload))
     } catch {
       throw createError({ statusCode: 502, statusMessage: 'The coauthor returned an invalid character draft.' })
     }