Capture the screen, paste it into your agent

This page is for anyone who already runs the screenshot-to-prompt loop a dozen times a day and wants it to stop losing context past the third finding. It's part of the feedback for AI coding agents hub, where the same workflow gets applied to every tool in the stack.

The default pattern people use today

You see something broken on a staging build. You hit Cmd-Shift-4 on Mac, or fire up Snipping Tool on Windows. You drag a box, save a PNG to the desktop. You switch tabs to ChatGPT or Cursor or Lovable. You drag the PNG into the chat. You type a sentence: "this button is misaligned on mobile, please fix." You hit send.

For one finding, that flow works. The agent has the image, you have the sentence, the fix lands.

For three findings, it starts to fray. Which screenshot was the alignment issue and which was the color one? Did you mention the breakpoint? Was that the iOS bug or the Android one? You re-paste, retype, re-explain. By the fifth screenshot the conversation is a wall of disconnected PNGs and your prompts have collapsed into "fix the third image."

This is the screenshot-to-prompt pattern at its native limit. The pattern is right. The tooling is wrong.

A structured screenshot-to-prompt workflow

Open cobaltcapture.com in a tab. Hit Capture screen and pick the window you want to review. CobaltCapture grabs the frame. Drag a box around the broken element, hit Dictate, and talk through what's wrong: "the submit button overflows the container at widths under 380px on iOS Safari, desktop is fine." Your spoken commentary becomes editable text next to the cropped screenshot. Repeat for each finding.

Hit Publish. You get a public URL like cobaltcapture.com/r/abc12345 and a markdown export.

That markdown is the artifact. Cropped PNGs with stable URLs, the source page URL preserved, your dictated commentary as paragraphs underneath each image. The screenshot is anchored to its context instead of floating in a chat thread.

Now the screenshot-to-prompt step is a one-liner. You don't drag PNGs. You don't retype. You paste the URL into your agent and tell it what to do.

Example

The staging review for the checkout flow is here:
https://cobaltcapture.com/r/abc12345

Fix the three items in order. Show me the diff for each
before moving to the next.

Cursor, Claude Code, Lovable, Windsurf, any agent that follows URLs pulls the embedded screenshots inline and reads the dictated commentary as plain text. The prompt stays one sentence. The context is the URL.

Why a structured artifact wins

A bitmap dragged into a chat strips its source URL, its DOM context, and the order it was captured in. Typed prose under each image strips the nuance you'd actually say out loud, the "this only repros on iOS after the user scrolls past the fold" details that shape the patch. CobaltCapture markdown carries both: the image and the spoken context, in the order you found them, with the source URL intact.

This is the screen capture to markdown pattern. The same artifact reads correctly for a teammate skimming Slack, an agent processing a composer paste, and a future you reopening the review next week. One capture, one output, every downstream reader gets what they need.

The screenshot-to-prompt loop becomes "screenshot to URL to prompt." The extra step costs ten seconds and saves the next five re-explanations.

When the default is fine

Not every screenshot needs structure. If you spot one bug, drag the PNG into ChatGPT, type a sentence, and get a one-shot fix, that's the right amount of tooling. CobaltCapture would be overkill.

The default flow holds up when there's no follow-on (the agent fixes it and you move on), no record needed (you're not handing the review to a teammate or your future self), and no agent picking up the work in the next session (today's prompt finishes today's bug).

CobaltCapture is for the other case: three or more findings, a review you want a teammate or client to read, a .md file that sits in the repo so the next Claude Code or Cursor session can pick up where this one ended. When the screenshot-to-prompt pattern needs to scale past one screenshot and survive past one session, the structured version wins. Below that line, Cmd-Shift-4 is great.

Get started

CobaltCapture is free to try. Capture your first review, paste the URL into your next agent prompt.

Related

• Markdown bug reports
• Feedback loop for vibecoding
• Human-to-agent handoff
• All agents