What is Cofactor?

Cofactor is the counterbalance to AI coding velocity — an AI-era QA platform that verifies your product works the way your users expect, from local to deploy. Instead of asking engineers to hand-write and babysit brittle end-to-end scripts, Cofactor drives a real browser alongside your AI coding tools, turns every session into a deterministic trace, and keeps the suite green as your UI shifts.

01The core idea

You connect a Property (your web application) and pair Cofactor with your editor. From there, Cofactor shows up at the three checkpoints your team already works at — and never asks anyone to learn a new tool:

1. Pairs locally. The agent drives a live browser from inside Claude or Cursor — clicking, typing, asserting — and records the run as a deterministic trace you can commit.
2. Checks every PR. Cofactor reads the diff and the linked ticket, runs a tailored test plan, and posts green-or-red with scrubbable video evidence for each case.
3. Maintains the suite. When a selector drifts or a page changes, the suite heals itself, updates its cache, and stays green without human intervention.

02How tests are written

You don't script tests — you describe intent and let the agent do the run. Each test lives as a .cofactor.md file in your repo — one workflow, one journey, written in human-readable Markdown:

# Checkout — happy path

step open  /cart/checkout
step fill  email   "taylor@acme.co"
step fill  card    "4242 4242 4242 4242"
step click "Pay $42.00"
expect url  /order/confirmed

Because the trace is deterministic, the same recording replays in CI, in a PR sandbox, and on our grid — no rewriting between stages.

03What you get day to day

Cofactor runs quietly in the background of how you already ship. On any given day:

• A check on every PR. Green-or-red within minutes, with video, network HAR, and console for each case — no extra CI jobs to wire up.
• Self-healing suites. Selectors and copy changes are absorbed automatically; the suite stays green instead of going red on noise.
• Flake, triaged. A classifier separates real regressions from flaky infrastructure, so red means red.
• One synced dashboard. New cases auto-drafted from merged PRs and Jira tickets, all in one place across GitHub, Jira, and Linear.

04Who it's for

Cofactor is built for teams shipping with AI coding tools — where code now lands faster than any hand-written suite can keep up. If your engineers use Claude Code, Cursor, Copilot, or Continue and your QA can't move at the same speed, Cofactor is the layer that closes the gap.

It fits whether you have a dedicated QA function or none at all: the agent authors the coverage, and the suite maintains itself, so a two-person team gets the same safety net as a hundred-person org.

05In one sentence

Cofactor drives your real product like a user, proves every change with video evidence, and maintains the suite itself.