ripgrep

Jevgrep is a command-line tool for coding agents that finds relevant files and source context in unfamiliar repositories from natural-language questions. It uses Jev to judge relevance across folders, files, and declarations, explores qualifying branches of the repository hierarchy, selects files through content previews, identifies useful source units and surrounding context, and returns a summary followed by file locations, reading leads, and verbatim excerpts with line references. Python and TypeScript/JavaScript support declaration parsing, while other text uses a fallback. It also includes an agent skill that teaches supported coding agents when to invoke the CLI and how to use its results. The CLI is distributed through npm as @dzhng/jevgrep, requires Node.js 22 or later on macOS or Linux, and requires authentication with a supported AI provider. Searches send eligible source content to Jev through the selected provider; local filtering excludes ignored, hidden, dependency/build, binary, and obvious credential files but is not a guarantee that sensitive data is removed. The project is MIT-licensed.

grex is a command-line tool and Rust library with Python bindings that generates a regular expression from user-provided test cases. It aims to produce the shortest possible expression that matches the supplied strings, using literals, character classes, alternation, optional groups, repeated substrings with quantifiers, prefixes and suffixes, and optional anchors; command-line options or library preprocessing can generalize the result for cases such as digits and repeated values. The CLI accepts strings and can read input from a file. By default, the generated expression is intended to match only the supplied test cases, while options such as shorthand character classes can broaden its matches. It produces Perl-compatible expressions compatible with Rust's regex crate, and the project recommends inspecting generated expressions by hand for domain-specific correctness and engine-specific optimization.

geiger is a read-only command-line scanner from Atomburst that inventories AI agents, harnesses, MCP servers, plugins, skills, hooks, browser extensions, desktop AI applications, and related IDE configurations on a machine. It reads known configuration files and directories, identifies each finding's origin and evidence path, and labels capabilities such as code execution, secret storage, broad filesystem access, broad web access, and network access. Credential-shaped values are reported by key name, file, and secret type without exposing value contents; the scanner performs no telemetry and writes only an explicitly requested report file. It can emit terminal, HTML, or versioned JSON reports, scan specified project or home directories, enforce a strict exit status for findings that can execute code or hold secrets, and compare JSON snapshots to identify newly appeared, removed, or escalated findings. It runs through npx with Node.js 18 or newer, has no runtime dependencies or account requirement, and is licensed under MIT. The project notes that it reads configuration rather than runtime behavior, covers known locations, and does not determine whether a package is malicious.

Code-Graph-RAG is an open-source retrieval-augmented generation system for querying, understanding, and editing multilingual codebases. Its Tree-sitter-based parser extracts functions, classes, methods, modules, and relationships, then stores them in Memgraph under a unified graph schema. An interactive CLI converts natural-language questions into Cypher queries, retrieves source code by name or intent, and supports AI-assisted editing and optimization. It provides AST-based surgical patches with diff previews, structural search and rewriting through ast-grep, dead-code discovery by traversing call and reference edges, and runtime-call overlays from test traces or production eBPF profiles. The project also supports MCP integration and publishes the `cgr` command-line tool to PyPI.

REA is a local reverse-engineering tool for AI agents, distributed as a CLI and MCP server. It connects agents to analysis providers such as Hopper and Ghidra, and can inspect native binaries, macOS applications, JavaScript and Electron applications, .NET assemblies, websites, packages, and controlled runtime behavior. Its investigation workflow decompiles or maps a target, follows strings, symbols, calls, references, and control flow, records evidence and limitations, and uses the findings to help reconstruct features in another project without claiming to recover original source code or automatically clone an application. Analysis runs on the local host; REA configures agent integrations and can optionally install Hopper, while Ghidra and Java must be installed separately. The project is distributed under the MIT license.