From my workbench
to your next idea.

Personal tools, plugins, and experiments made to be used. Start with a stranger joke or a more carefully built book.

Explore the downloads

Paperback Cover Calculator

See the full wrap before you design it: back, spine, front, bleed, safe areas, and barcode space. Export a measured SVG, PDF guide, or production specification.

No account or AI credits required.

Open the calculator →

Bit Bench

Find the turn. Keep the laugh. Shape a premise into a performance with editable beats, alternate drafts, speaking-time estimates, and notes from the room.

Your material, saved in your browser. No account or paid AI generation.

Open Bit Bench →

The Evidence Desk

Make the claim. Show the grounds. Keep Scripture, historical evidence, interpretation, and speculation distinct while building a traceable study brief.

Start blank or explore a worked Babel example. Local saving, printable reports, and an optional companion skill.

Open The Evidence Desk →

Dark Comedy Premise Lab

Sharper. Darker. Stranger. Less predictable.

Get past the first obvious joke.

A modular AI writers’ room for turning an observation into angles, punchlines, tags, and a bit with somewhere to go. Built for writers who want to keep their voice while pushing their material further.

  • A router plus 27 focused comedy-writing skills.
  • Premise development, misdirection, escalation, callbacks, and set structure.
  • Joke diagnosis, originality checks, and voice-preserving revision.

No site account or checkout. Requires Codex with plugin support; Codex or model usage may have separate costs.

Try this first

My neighbor bought a doomsday bunker. Find eight non-obvious angles, choose the strongest, then build a short bit with tags. Keep the narrator’s flaws in play.

Requirements & installation

Codex with plugin support. Python 3 is optional for the included fixture audit. No additional account connector is bundled.

Extract the ZIP, keep the entire folder in a permanent location, and open a terminal inside dark-comedy-premise-lab-1.0.1. Run:

codex plugin marketplace add .
codex plugin add dark-comedy-premise-lab@karson-comedy

Then open a new Codex task and select Dark Comedy Premise Lab. Read the installation guide.

Release notes & file verification

September 18, 2026 · Public packaging release. Includes portable local marketplace setup and a README. Includes sample material and a structural fixture audit. The plugin is a writing workflow, not a graphical comedy application.

SHA-256

f698e0a8743bd80d487c341ed3fae6f289c4f8b644be8f9a3a8fbbbef08a48c7

Package structure and local Codex installation verified. Output quality still requires your judgment. These are independent creations, not official OpenAI or Amazon products.

KDP Genius

Better books begin with a deliberate process.

Give the manuscript a production plan.

A book-production workflow that connects the manuscript, interior, cover, ebook assets, and delivery checklist. Built around clear specifications and honest verification.

  • Structured manuscript-to-package production guidance.
  • Paperback cover-dimension calculator and sample book specification.
  • Basic PDF inspection helper with hashes and interior page-count checks.

No site account or checkout. Requires Codex with plugin support; Codex or model usage may have separate costs.

Try this first

Use KDP Genius to assess my manuscript and create a book-spec.json. Identify missing production decisions, then plan the interior, cover, ebook, and local checks. Do not claim KDP acceptance.

Requirements & installation

Codex with plugin support, Python 3 for helpers, and Poppler pdfinfo on PATH for PDF inspection. Document, image, PDF, and EPUB production tools are separate requirements for the formats you create.

Extract the ZIP, keep the entire folder in a permanent location, and open a terminal inside kdp-genius-0.1.1. Run:

codex plugin marketplace add .
codex plugin add kdp-genius@karson-kdp

Then open a new Codex task and select KDP Genius. Read the installation guide.

Release notes & file verification

September 18, 2026 · Public packaging release. Includes portable local marketplace setup and a README. Generalizes author-brand settings, rejects cream/color paper combinations in the calculator, and clarifies the PDF checker’s limited scope. Amazon Previewer and proof checks remain separate.

SHA-256

084b91ec59315ba8459cca54039b8855b8a204459b74dcd27a0a2f53aac9bd04

Package structure and local Codex installation verified. Output quality still requires your judgment. These are independent creations, not official OpenAI or Amazon products.

A plugin for your workspace.
A starting point for your work.

  1. Have Codex ready. These downloads extend Codex; they do not run as standalone apps or install into a regular ChatGPT chat. If you do not have the command-line tool, follow the official Codex CLI setup guide.
  2. Download and extract the ZIP. Keep the whole extracted folder, including hidden configuration folders. Its README contains the same installation commands shown above. Put the folder somewhere permanent before installing.
  3. Register and install. Open a terminal in the extracted folder. Run the two commands under your chosen plugin’s installation details. The first registers that local collection; the second installs the plugin.
  4. Start a new Codex task. Choose the plugin and bring a premise, draft, or manuscript. Try the example prompt, then make the work your own.

If a command is unavailable, update Codex using its official instructions. The download is a local installation package, not a one-click official marketplace listing.

For book projects: KDP Genius helps organize production and local checks. Its bundled PDF helper checks file presence, readability, hashes, and interior page count; it does not certify fonts, margins, cover dimensions, EPUB validity, or KDP acceptance. Review current Amazon specifications and the KDP Previewer before publishing.

Make something worth using.

Plugin support, digital products, custom workflows, and ideas for what should come next.