Red Hat's ripwire gives coding agents repo context with no vector DB or embeddings
rickasaurus · x · 2026-09-08
Red Hat Emerging Technologies released ripwire, a new approach to giving coding agents repository context without embeddings, a vector database, an LLM indexer, or a daemon.
Key details:
- A zero-dependency C++23 binary that parses 21 languages with Tree-sitter and builds a deterministic structural map of a codebase
- Ranks symbols per task while attaching call relationships, complexity, git churn, change amplification, and test coverage
- An agent asking about e.g. "incremental cache invalidation" gets relevant symbols, callers, likely blast radius, and tests to run in a token-budgeted response, instead of grepping and opening files repeatedly
Retweeter Aaronontheweb reports it decisively beat a Roslyn-based single-file indexing tool in his test, concluding "Bitter lesson wins again."
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