Assistant Snake-Case Realignment — Implementation Plan (AionUi companion)

Authoritative plan: aionui-backend/docs/backend-migration/plans/2026-04-24-assistant-snake-case-realignment-plan.md

This file is a pointer-only copy so AionUi-only reviewers can discover the plan alongside the frontend-side spec.

Frontend task summary

Three branches off feat/backend-migration-coordinator-assistant-camel:

1. feat/assistant-snake-case — T2a, frontend-dev (heavy): assistantTypes.ts field flip + ts-morph codemod across 43 files, 209 access sites; migrateAssistants.ts split out legacyAssistantToCreateRequest mapper; Vitest + Playwright fixtures realigned.

2. fix/acp-camelcase-hotfix — T2b, frontend-dev (light): ipcBridge.ts setModel body uses model_id, verify setConfigOption body clean. 2 regression tests.

3. fix/fs-temp-camelcase-hotfix — T2c, frontend-dev (light): ipcBridge.ts createTempFile/createUploadFile type signatures flipped; all call sites updated (tsc-enforced). 2 regression tests.

T3 e2e-tester integrates all three branches, runs Playwright + regression. T4 coordinator merges into the coordinator branch, packaging smoke, handoff.

See the authoritative plan for exact steps and commands.