Chet Mancini

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Projects

Open tools and products I build outside my day job, plus a short bibliography of earlier talks and open-source work.

Current

Tubeless, Managed Agentic Workflows, framed by a looping road and colored stripes.
Tubeless

Pipelines and agents, built from TypeScript functions. Define a pipeline and get retries, concurrency, cached step outputs, checkpointing, and progress tracking for free. Tubeless runs locally or remotely, includes dry runs, a CLI, and a web UI, and also runs agents that choose and change their next steps as they work.

About Tubelesstubeless.ioSource

Agent Smith wordmark and an ASCII-art portrait in terminal green on a near-black background.
Agent Smith

Evidence-based tuning for coding agents. A plugin for Claude Code, Codex, Gemini CLI, OpenCode, Pi, and Grok that watches real sessions, records what happens, and turns it into concrete recommendations for prompts, settings, and workflow.

About Agent SmithGitHub

Script Bible gold bookmark and wordmark on rich brown leather.
Script Bible

Bible study with semantic search. Find passages by wording or meaning, explore more than 430,000 cross-references, and study Hebrew and Greek words in context. Reading plans and offline reading are included. Free and ad-free, with public Scripture tools available to agents through a remote MCP server.

About Script Biblescript.bible

Pen sketch of the pyramids of Giza and the Nile beside the word Thebes, on warm paper.
Thebes

A small lambda architecture for realtime data. Events arrive over HTTP and land in an append-only log. A batch layer recomputes the views, a speed layer folds in each new event, and the serving layer merges the two. About 1,200 lines of commented Clojure, with a Nile flood demo.

About ThebesGitHub

DateUtils Python workweek calendar mark and wordmark, with the tagline “Dates, without the baggage.”
DateUtils Python

Dates, without the baggage. Fully typed date and time helpers for Python, with zero dependencies. Calculate business days, account for US federal holidays, parse and format dates, and convert between timezones using the standard library.

About DateUtils PythonGitHub

Illustration of a pour-over coffee brewer and server with rows of data.Pour-Over SQL

Prior work

  1. [1]The Fun of Connection: Building Abstractions in Data Systems. Midwest.io, 2015.
  2. [2]Hiss: gossip-protocol messaging with vector clocks for causal ordering, on Twisted. Cornell M.Eng. capstone, 2012.
  3. [3]Flambo, a Clojure DSL for Apache Spark (DataFrame and SQL APIs). Open-source contribution.
  4. [4]Apache Spark (minor contributions). Open-source contribution.
  5. [5]Storm-HyperDex: an adaptor between Storm and the HyperDex key-value store. Open source.
  6. [6]ADMM on Hadoop. Intent Media, open source.
  7. [7]Technical Foundations of Vertica. Intent Media engineering talk, 2013.
  8. [8]dateutils-python: date and time utilities for Python, including timezones, business days, and holidays. Open source.
  9. [9]dotfiles: my macOS and Linux development setup, with shell, editor, and CLI configuration. Open source.