editor/packages/mcp/test-reports/research/PHASE7_PLAN.md

Phase 7 plan — A+B storage + edge cases + ideas

Shared SceneStore contract (every agent reuses this)

// packages/mcp/src/storage/types.ts (Agent 1 owns)

import type { SceneGraph } from '@pascal-app/core/clone-scene-graph'

export type SceneId = string  // slug-safe (a-z0-9-), ≤ 64 chars

export interface SceneMeta {
  id: SceneId
  name: string
  projectId: string | null
  thumbnailUrl: string | null
  version: number            // monotonic, incremented on every save
  createdAt: string          // ISO 8601
  updatedAt: string
  ownerId: string | null
  sizeBytes: number
  nodeCount: number
}

export interface SceneWithGraph extends SceneMeta {
  graph: SceneGraph
}

export interface SceneStore {
  readonly backend: 'filesystem' | 'supabase'
  save(opts: {
    id?: SceneId
    name: string
    projectId?: string | null
    ownerId?: string | null
    graph: SceneGraph
    thumbnailUrl?: string | null
    expectedVersion?: number  // 409 on mismatch
  }): Promise<SceneMeta>
  load(id: SceneId): Promise<SceneWithGraph | null>
  list(opts?: { projectId?: string; ownerId?: string; limit?: number }): Promise<SceneMeta[]>
  delete(id: SceneId, opts?: { expectedVersion?: number }): Promise<boolean>
  rename(id: SceneId, newName: string, opts?: { expectedVersion?: number }): Promise<SceneMeta>
}

export class SceneNotFoundError extends Error { code = 'not_found' as const }
export class SceneVersionConflictError extends Error { code = 'version_conflict' as const }
export class SceneInvalidError extends Error { code = 'invalid' as const }
export class SceneTooLargeError extends Error { code = 'too_large' as const }

export function createSceneStore(env?: NodeJS.ProcessEnv): SceneStore { /* factory */ }

Agent scope map

Agent	Scope	File ownership
A1	Storage interface + types + factory	packages/mcp/src/storage/types.ts, packages/mcp/src/storage/index.ts, packages/mcp/src/storage/store.test.ts
A2	Filesystem impl	packages/mcp/src/storage/filesystem-scene-store.ts + tests
A3	Supabase impl + migration SQL	packages/mcp/src/storage/supabase-scene-store.ts, packages/mcp/sql/migrations/0001_scenes.sql + tests
A4	MCP scene-lifecycle tools	packages/mcp/src/tools/scene-lifecycle/*.ts + index wiring
A5	Next.js API routes	apps/editor/app/api/scenes/route.ts, apps/editor/app/api/scenes/[id]/route.ts, apps/editor/lib/scene-store-server.ts
A6	Editor routes + kill dev hook	apps/editor/app/scene/[id]/page.tsx, apps/editor/app/scenes/page.tsx, edit apps/editor/app/page.tsx
A7	URL hardening in core schemas	packages/core/src/schema/nodes/{scan,guide,item}.ts, packages/core/src/schema/material.ts + migration
A8	Auto-frame camera + scene templates	packages/editor/src/hooks/use-auto-frame.ts, packages/mcp/src/templates/*, packages/mcp/src/tools/scene-lifecycle/list-templates.ts
A9	Multi-variant generation	packages/mcp/src/tools/variants/* + tests
A10	Photo → scene + example	packages/mcp/src/tools/photo-to-scene/* (orchestrator), update README.md, new examples/photo-to-scene.md

Global coordination rules

• Agent A1 drops first (interface only). A2, A3, A4, A5 read from packages/mcp/src/storage/types.ts; if it doesn't exist when they start, they should inline a copy of the types above and the integrator fixes up the import later.
• All MCP tools use StreamableHTTPClientTransport-compatible input/output Zod schemas.
• Every tool uses the shared SceneStore via createSceneStore() — never instantiates concrete stores.
• Tests are bun:test, colocated.
• Biome 2-space, single quote, no semicolons, trailing commas all.
• Do NOT run bun install — already done.
• Do NOT modify files outside your ownership.

Acceptance

• bun test --cwd packages/mcp green.
• bunx biome check packages/mcp apps/editor/app green.
• bun run --cwd packages/mcp build green.
• MCP save_scene → list_scenes → editor opens /scene/<id> works without window.__pascalScene.