CICADA is an MCP server that provides AST-level knowledge of your codebase for Elixir and Python (Beta). It exposes module and function definitions with signatures, specs, docs, and owning files; Python classes and methods; and Elixir module/function tracking. It delivers complete call-site tracking across aliases, imports, and dynamic references, enabling accurate usage graphs. Semantic/keyword search enables querying by concepts such as "authentication" even when the symbol name differs. Git history and PR attribution surface why code exists, tying changes to specific merges and reviews. It includes dead-code detection and module dependency views to support safe refactors. The server automatically detects the language of the project and indexes accordingly. It ships 7 focused MCP tools—query, search_module, search_function, git_history, find_dead_code, expand_result, and query_jq—providing structured Markdown/JSON outputs to keep prompts lean. Indexing can be incremental and watch-mode enabled for automatic reindexing; PR indexing can be refreshed via gh. CICADA runs locally with no telemetry, storing data under ~/.cicada/projects and optionally integrating with GitHub for PRs. It aims to reduce token usage and improve AI answer quality by offering structured context.