🏗️ Architecture: Session 133: Unified Vitto Chat System implementation - what...

Date: 2026-02-21
Time: 19:03:31 UTC
Session: gspace1-133.6
Agent: angular
Confidence: NaN%
Status: ✅ Documented

📋 Decision Context

Question:

Session 133: Unified Vitto Chat System implementation - what was built?

Task: Not specified

🎯 Decision Made

Chosen:

Full composable system: 3 UX libs + 22 sub-components + 6 services + 5 plugins

Options Considered:

1. Incremental fixes to existing chat components
2. Full composable system: 3 UX libs + 22 sub-components + 6 services + 5 plugins

💭 Reasoning

Built @libs-ux/ux-code-highlight (9 language grammars, token-based highlighting), @libs-ux/ux-markdown (custom parser+sanitizer+renderer), @libs-ux/ux-emoji-reactions (picker+reactions+stickers). Decomposed VittoChatEngineService into 6 focused services (engine, persistence, cost, context, streaming, model). Created 22 sub-components with hard per-file caps (TS<=250, HTML<=120, SCSS<=150). Built 5 plugin implementations (Generation, Context, Agent, Model, Action). Updated all 4 app route files. Added deprecation notices to SimpleAiChat (740 lines), AiChatCore (5,519 lines), VittoChatService (475 lines). Total new code: ~8,060 lines across ~110 files (avg 73 lines/file) vs 8,700 lines of deprecated monoliths.

📁 Files Involved

• No files specified

🔗 Related

• Decision ID: dev_1771700611498_6tpqp75
• Session: 133
• Workspace: gspace1

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