flexatone.net
works of Christopher Ariza
Systems
Having programmed in Python since 2000, I have created and contributed to numerous open-source tools for both music and data processing. My recent work uses Rust & TypeScript for high-performance observability and cybersecurity tools.
Featured Systems
Fetter IO is a web-based platform for tracking Python packages and vulnerabilities.
Fetter IO
Python Supply-Chain Omniscience.
2025 to present
Rust, Axum, TypeScript, NextJS, React, Tailwind, Caddy, PostgreSQL, Terraform, AWS: EC2, RDS, CloudFront, WAF
With hundreds of vulnerabilities reported every day, what if each CVSS vector could be visually distinguished based on an expressive glyph?
VulnSig
Render CVSS vulnerability vectors as expressive SVG glyphs.
2026 to present
CVSS, SVG, TypeScript, Python, Rust, React, Tailwind, NextJS, Terraform, AWS: Amplify, Lambda, EventBridge
My passion for writing fast and maintainable Python DataFrame code led to the creation of StaticFrame.
StaticFrame
Immutable and statically-typeable DataFrames with runtime type and data validation.
2018 to present
Python, NumPy
All Systems
dadophoros
Observe every outbound connection on a Linux host, attribute it to its originating process, and enforce kernel-level deny rules.
2026 to present
Rust, eBPF, Tokio, Ratatui, TOML, Protocol Buffers
spinwright
LLM-driven agent that finds a slow Python test, profiles and edits to optimize it, and opens a PR with measured improvements.
2026 to present
Python, Anthropic / OpenAI / Ollama APIs, Callgrind, GHA
garbelour
Classify every hunk in a git diff or pull request by how much reviewer attention it deserves: review, skim, or skip.
2026 to present
Rust, tree-sitter, Anthropic / OpenAI / Ollama APIs, GitHub Actions
Disclude
Scan source code for signs of hidden intent and obfuscation.
2026 to present
Rust, SARIF, Anthropic / OpenAI / Ollama APIs
VulnSig
Render CVSS vulnerability vectors as expressive SVG glyphs.
2026 to present
CVSS, SVG, TypeScript, Python, Rust, React, Tailwind, NextJS, Terraform, AWS: Amplify, Lambda, EventBridge
Shuntly
A lightweight wiretap for LLM SDKs. Capture all requests and responses with a single line of code.
2026 to present
Python, TypeScript, Anthropic SDK, OpenAI SDK, Google GenAI SDK, LiteLLM, Ollama, Mozilla any-llm, pi-ai
conditional-futures
Make multi-threaded concurrency backward- and forward-compatible for the free-threaded future of Python.
2025 to present
Python
Fetter IO
Python Supply-Chain Omniscience.
2025 to present
Rust, Axum, TypeScript, NextJS, React, Tailwind, Caddy, PostgreSQL, Terraform, AWS: EC2, RDS, CloudFront, WAF
Fetter MCP
A remote MCP server (https://mcp.fetter.io/mcp) that gives AI coding agents real-time access to Python package vulnerability data via PyPI and OSV.
2026 to present
Rust, RMCP, PyPI, OSV DB
Assistant Research
Daily LLM process to derive a profile from GitHub activity, collect and rate articles based on relevance to that profile, and generate a daily digest posted as an issue.
2026 to present
Anthropic API, GitHub API, Python
ampullator
Dynamic generators of complex signals and shapes.
2025 to present
Rust
xensieve
Rust-based implementation of the Xenakis sieve.
2024 to present
Rust, PyO3 Maturin
Fetter
System-wide Python package discovery, validation, and allow-listing.
2024 to present
Rust, OSV DB, PyO3 Maturin
StaticFrame
Immutable and statically-typeable DataFrames with runtime type and data validation.
2018 to present
Python, NumPy
StaticFrame API Search Server
Search and explore the StaticFrame API with MCP and OpenAPI servers.
2023 to present
TypeScript, React, NextJS, Tailwind, TypeScript MCP SDK, AWS: Amplify
ArrayKit
Python C Extensions for StaticFrame.
2020 to present
C, NumPy C API, CPython API, Python, NumPy
FrameFixtures
Use compact expressions to create diverse, deterministic DataFrame fixtures with StaticFrame.
2020 to present
Python, NumPy
function-pipe
Tools for extended function composition and pipelines in Python.
2014 to 2017
Python
music21
A Toolkit for Computer-Aided Musical Analysis and Computational Musicology.
2009 to 2012
Python, MusicXML, MIDI