cix vs. the alternatives.

What it's good at

Finding strings, fast. Nearly free for a quick 'where does this name appear.'

Where it falls short

Text-shaped. No concept of definition vs. mention vs. comment. No routes, tables, schemas, or impact. AI assistants make worse decisions on large piles of text matches.

Where cix overlaps and differs

cix returns symbols, not text matches — with structured metadata (file/line, type, signature, language). Smaller, more relevant result sets the assistant can actually act on.

What it's good at

Real-time semantic understanding inside an editor. Go-to-definition, find-references, refactoring tools.

Where it falls short

LSPs run inside the editor. AI assistants typically operate outside it. The LSP's structured knowledge is invisible to most assistants today. Also single-language — a typical web project has at least three language surfaces.

Where cix overlaps and differs

Builds a similar structured index but exposes it over MCP. Spans languages — a single query returns TypeScript symbols, SQL schema, and HTTP routes from the same project. Plus migrations parsed into a schema view and conventions enforced at write time.

What it's good at

Finding chunks semantically similar to a query, even when they share no exact tokens.

Where it falls short

RAG returns arbitrary chunks, not symbols. Noisy results — three lines of an unrelated function happen to share vocabulary. No concept of canonical vs. duplicate. Doesn't know schema, routes, conventions, or impact.

Where cix overlaps and differs

Structured, not similarity-based. Returns the function, not 'a chunk that mentions the function.' Carries metadata that lets the assistant judge relevance precisely. Answers structured questions ('who calls this?') that RAG cannot answer at all.

What it's good at

Capturing project rules every session reads at startup. Useful for 'we use this style,' 'tests live here.'

Where it falls short

Static. Read once. Cannot answer 'does X exist?' Cannot enforce anything. Get out of date the moment the project evolves and someone forgets to update.

Where cix overlaps and differs

Not a replacement — they pair. The instruction file describes intent and culture. cix's index answers factual questions. cix's convention layer enforces structural rules at write time.

What it's good at

In theory, embedding your project's patterns and idioms into the model's behavior.

Where it falls short

Costly to maintain — your codebase changes daily, a fine-tuned snapshot ages out the moment a refactor lands. Vendor risk: if the underlying model retires, you redo the work. Black box: can't audit what was learned.

Where cix overlaps and differs

Same outcome — an assistant that behaves consistently in your project — through grounding rather than training. Cheap, transparent, portable. The behavior comes from queryable facts, not learned patterns.

What it's good at

Zero setup. Use the assistant as-is.

Where it falls short

Duplicates accumulate. Conventions drift. Schema gets fabricated. Files end up in the wrong places. Reviewers spend time on small mechanical issues instead of judgment calls. The cost is real, just paid in small increments that compound.

Where cix overlaps and differs

A small, focused intervention against a real and well-documented set of failure modes. Doesn't change how the assistant works at the core; gives it the right grounding to make better decisions.