Alter Ego

Alter Ego is Phase 6: Sidekick gets its mind. Scope: Core Drive (your principles, values and mental models), semantic search over your content, the provider-agnostic AI layer, and Alter Ego itself, which answers as the version of you those principles describe.

Milestone: Sidekick gets its mind. Core Drive holds your principles, values, and mental models; your content is semantically searchable; and Alter Ego — grounded in Core Drive + Taxila — answers as the version of you who sees clearly. Learning payoff: pgvector, HNSW indexes, semantic chunking, provider-agnostic AI routing, streaming structured responses, RAG pipeline design. Prerequisites: Write the Core Drive and Alter Ego PRDs in content/docs/02-prd/. The Alter Ego PRD must specify the source-attribution contract (internal vs. web source classes, color coding, footnotes — see Source Attribution and Structured Response Attribution).

6A — Core Drive (context layer)

6B — Provider-agnostic AI foundation

6C — Alter Ego

Phase 6 Exit Criteria: You can ask Alter Ego a question; the Context Assembler loads your kernel principles plus applicable Core Drive entries, RAG retrieves relevant knowledge chunks, and the answer streams as a structured, source-attributed response. effortLevel is honored end-to-end (contract → assembler → router). Models are resolved via the router config — switching providers is a config change. Failed embeddings are visible and retriable.

---