dceaf82934
Full-codebase-audit 2026-05-30 outputs: - Audit report: 09 - Audits/Full Codebase Audit - 2026-05-30.md - 81 issue files ISSUE-055..135 (decisions + 1 skipped no-brainer). - Scanner docs from scratch (was zero): architecture, data model, API ref, payment flow, operations runbook + repo README. - Doc-sync updates across API reference, data models, flows, design system. - Secret Rotation Runbook (08 - Operations) for the exposed credentials. - Reusable workflow guide (07 - Development) + .claude/workflows/full-codebase-audit.js. Issues remain status:open intentionally — the code fixes are uncommitted-then-committed working-tree changes per repo and aren't "resolved" until merged/deployed. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
40 lines
1.3 KiB
Markdown
40 lines
1.3 KiB
Markdown
---
|
|
issue: 072
|
|
title: "Backend: chat messages stored as embedded array — unbounded document growth, 16MB ceiling"
|
|
severity: high
|
|
domain: Chat
|
|
labels: [performance, backend, data-model]
|
|
status: open
|
|
created: 2026-05-30
|
|
source: Full Codebase Audit 2026-05-30
|
|
---
|
|
|
|
# Backend: chat messages stored as embedded array — unbounded document growth, 16MB ceiling
|
|
|
|
**Severity:** high
|
|
**Domain:** Chat
|
|
**Labels:** performance, backend, data-model
|
|
|
|
## Description
|
|
|
|
`backend/src/models/Chat.ts:173` stores all messages as an embedded array in the Chat document. MongoDB's 16MB document size limit will be hit for active long-running chats. Reads also load the full message history into memory even when only the latest page is needed.
|
|
|
|
## Options
|
|
|
|
1. Migrate messages to a `Messages` collection keyed by `chatId` with pagination.
|
|
2. Cap embedded messages and archive older ones.
|
|
3. Keep embedded but project only needed messages (slice) on reads.
|
|
|
|
## Recommendation
|
|
|
|
Plan migration to a dedicated `Messages` collection. This is a large data-model migration that needs careful coordination.
|
|
|
|
## Affected Files
|
|
|
|
- `backend/src/models/Chat.ts:173`
|
|
- `backend/src/services/chat/ChatService.ts` — all read paths
|
|
|
|
## References
|
|
|
|
- [Full Codebase Audit 2026-05-30](../09%20-%20Audits/Full%20Codebase%20Audit%20-%202026-05-30.md) — DEC-42
|