Product review tool that survives the agent handoff

This page is for PMs and product marketers who review a build before it ships. The pattern fits anywhere on the use cases for visual product feedback hub, but the shape of a product review, many small findings across a flow, all of them visual, is where it earns its keep.

The problem

A typical product review goes like this: the PM walks the staging build, screenshots 8 things, drops them in three different Slack threads, types a sentence under each, tags the dev. The screenshots arrive without source URLs. The sentences lose track of which screenshot they describe by the third one. The dev fixes the four they understood and asks for clarification on the rest. The clarification gets answered in DMs. By the time the build merges, half the original findings are still open and nobody can find the thread.

The artifact is the problem. Eight disconnected images are not a review. They are eight pieces of a review that nobody assembled.

The CobaltCapture workflow

Open the staging URL. In a new tab, hit Capture screen at cobaltcapture.com and pick the staging window. Drag a box around the first finding, the broken nav, the wrong copy, the off-brand button. Hit Dictate and talk through it: "The CTA color doesn't match the design system, this should be the secondary cobalt not the bright blue." Repeat for each finding. The page you captured from gets stamped on every item as a source URL.

Hit Publish. You get a URL like cobaltcapture.com/r/<slug>. Drop it in the PR description, the design sync agenda, or the next prompt you send to your coding agent. The same link works for all three audiences.

What the output looks like

The published review is a structured markdown document. Every item has a heading, an embedded screenshot, the source URL of the page it came from, and your dictated commentary as a paragraph:

# Staging review, checkout flow

Source: https://staging.example.com/checkout

![Submit button overflow](https://cobaltcapture.com/r/abc12345/img/1.png)

The submit button overflows the container at widths under 380px. Tested
on iOS Safari and Chrome Android. Should respect the existing
max-width: 100% on .btn-primary.

![Email validation timing](https://cobaltcapture.com/r/abc12345/img/2.png)

Email validation fires on every keystroke. Should debounce or wait for
blur. The shake animation is also too aggressive for a soft-validate.

The markdown export means the review opens cleanly in any reader, GitHub PR description, Linear ticket body, a coding agent's context window. There is no proprietary viewer, no login wall, no expiring share link.

Why this beats screenshotting into Slack

Slack-and-screenshot is the default and it has two failure modes the markdown alternative does not.

First, the screenshots lose their source. Three weeks later when someone asks "wait, where was the submit-button issue?" the screenshot is in Slack but the URL of the staging page is not. The CobaltCapture export carries the source URL on every item, so the trail is recoverable.

Second, the prose drifts. In Slack you type "the button is broken" because typing more feels rude in a thread. In CobaltCapture you talk for thirty seconds and get a paragraph of nuance that a coding agent like Cursor can actually act on, which keystroke triggers it, which viewport, which browser, what should happen instead.

Who this is for

PMs reviewing staging builds before launch. Product marketers walking through the onboarding to flag copy issues. Anyone whose job is "look at the build and tell us what's wrong" and whose feedback then has to be readable by an engineer, a designer, and increasingly an AI coding agent that the engineer is steering. If your reviews are landing in DMs and screenshots and you cannot find them a week later, this is the workflow that fixes it.