CompletionPrism for VS Code

Do all your AI work in one place, and pay less for every piece of it.

CompletionPrism is one place to do your AI work: ask questions, write and analyze documents, and build and change software, in VS Code, your terminal, your browser and on your phone. Every job runs on the model that finishes it for the least, across Anthropic, OpenAI, Google and xAI, and every answer comes with a receipt showing what it cost and what it saved.

Completion Economics: priced by the work, not the token

Most AI cost tools look at the price of one request. That is the wrong number. A cheap model that needs three attempts, or gives an answer that looks right and is not, costs more than a stronger model that gets it right once, because somebody has to notice, fix and redo the work.

CompletionPrism is built on Completion Economics, our patent pending method for measuring what AI costs per piece of work finished. It counts:

• The attempts: every retry until the work is done.
• The rework: the time people spend finding and fixing wrong answers.
• The price of each model: on your own provider accounts.

Then, before each step, it picks the model expected to finish the work for the least total cost. Sometimes that is a cheaper model. Sometimes it is a stronger one, because that is what saves money.

How it works

1. You ask. Press the CompletionPrism icon, or Ctrl Alt C (Cmd Option C on a Mac), and type. The file you have open and the lines you selected go with the question.
2. CompletionPrism picks the model. For each step it chooses the model that finishes that kind of work for the least, and tells you which and why.
3. The agent does the work in the folder you have open: reads files, makes changes, runs your tests, and uses git, asking first whenever your chosen mode says to.
4. You review. Every change opens in VS Code's own diff view, with Keep and Undo on each block.
5. You get a receipt. What it cost on your provider account, what the model you would otherwise have used would have cost, and the saving. Every figure is labeled measured or estimated, and can be traced to the records behind it.

Features

You decide how much it may do

Plan first, Approve changes, Edit freely and Read only, on one button under the box. Full access too, when your company allows it. Your company can switch any of them off.

Plan first, then build

Ask for a plan and nothing changes until you approve it. The plan opens as a document you can comment on line by line.

It knows what you are looking at

The open file and your selection go with each question. Type @ for any file, @problems for the editor's errors, or @terminal for a terminal's output. Paste a screenshot. Secret files and files git ignores are never read unless you name them.

Help where the problem is

Fix with CompletionPrism on the light bulb of any error. A right click menu on a selection: explain, fix, write tests. A commit message written for you in Source Control. The editor's own error checks after every change, so mistakes are caught in seconds.

Go back to any point

Put the files back to any earlier message, branch the conversation from it, or both. Undo a whole job from its receipt.

Every session, and what it cost

History lists every session in this folder with what it cost, with search, groups and archive. The same sessions are in your terminal and your browser, with the same numbers.

Also in the editor

• Home and Sessions: what your work cost over any period, and the decision behind every step.
• Several conversations in tabs, with a dot when one is waiting for you.
• Skills, connections, plugins and standing rules, shared with the comprism terminal tool.
• Hand a job to your workspace, close VS Code, and bring its changes back later.

It leaves your other tools alone

CompletionPrism is its own app. It never changes Claude Code, Codex, Copilot or any other extension or tool, never sends their work through CompletionPrism, and uses only its own names, settings and files.

Getting an account

CompletionPrism is for business customers on a paid plan.

• Your company already uses CompletionPrism: ask your administrator to invite you. You get an email with your workspace name.
• Your company does not use it yet: request access at completionprism.com, or write to sales@illuminis.ai.

Until then, the extension shows a sign in screen and a link to request access.

Getting started

1. Install the extension.
2. Press the CompletionPrism icon and choose Sign in.
3. Enter your workspace name from your invitation, for example acme, and approve the code in your browser.

That is the whole setup. Everything else comes from your workspace.

What it reads and what it sends

It sends what you type, the attachments you chose or it attached (the open file, your selection, files you mention), and what the agent reads or runs as steps. Secret files, files your editor hides and files git ignores are never read unless you name them. "CompletionPrism: What this extension has sent" lists it for the session. Your sign in and any provider key are kept in your operating system's key store, never in a settings file.

Removing it

Uninstalling removes the extension and its sign in. It leaves your project files, your COMPRISM.md instructions, your sessions in your workspace, and ~/.completionprism/, which the terminal tool shares. If you do not use the terminal tool either, delete that folder.

Support

Your workspace administrator first, for anything about access, plans or keys. Then support@illuminis.ai.

CompletionPrism is made by illuminis.ai, an AI native software studio. Completion Economics is patent pending. Copyright illuminis.ai LLC. Licensed to business customers under the CompletionPrism subscription agreement. See LICENSE.