Your coding agent can't tell if it broke the app. Hover can.

The Claude Code loop is simple. The agent reads some context, takes an action, checks the result, and repeats until the task looks done. Guess, check, repeat.

The whole thing rises or falls on that check. When the agent edits a pure function, npm test and the type-checker tell it the truth in seconds. When it changes something a person clicks, checkout or login or a coupon field, the agent has no equivalent. It makes the edit, reasons about what probably happened, and moves on. On the exact part users see, it codes with its eyes closed.

The check the agent is missing

Here is the failure that costs you. You ask the agent to add a coupon field. It adds the field, touches the cart's state on the way, and leaves the checkout button dead. Every test it can run stays green, because none of them walk checkout end to end. The agent says "done." You find out in production.

Hover fills that one step. It gives the loop a real answer to "does this flow still work," recorded from your actual app and replayed with no model at run time.

One turn of the loop, with Hover in it

• Session start. Hover tells the agent where it stands: which flows are covered, which drifted in CI. It starts oriented instead of blind. (hover-hook install wires this to SessionStart.)
• You give the task. Before any code, you write down what "done" means for the coupon feature: the outcomes the test has to show. (/mcp__hover__guard.) The contract comes first.
• The agent writes code. The loop doing its normal work. Hover stays out of it.
• The agent checks itself. Instead of guessing, it replays the affected flows against the live app and gets a real pass/fail, plus the exact step that broke. This is the eyes.
• Red means something specific. Hover says whether the test drifted (a selector moved, so heal the test) or the app broke (a real regression, so fix the code). The agent knows its next move and loops.
• Before it finishes. A Stop gate holds the loop open until the specs pass. "Done" means the regression is green, not that the agent felt finished.

Why the check has to be deterministic

The loop's weakest link is trusting its own verification. "Have another model look at it" is not trust. It is a second guess. A recorded Playwright flow replays the exact clicks you performed, so its answer is ground truth, not an opinion. That is the signal the loop lacks for behavior, and the one Hover was built to produce.

Today it runs in CI. Next, in the turn.

Right now the check lives in your CI: the agent pushes, waits for the run, reads Hover Cloud's verdict, and loops. Minutes per turn. We are moving the same check into the local turn, so replaying a touched flow returns pass/fail in seconds without leaving the loop. Same deterministic signal, tighter cycle.

Hover isn't the agent. It's the verify step.

Your own Claude Code is the intelligence. Hover is the step it plugs into, through the loop's own parts: tools the agent calls, hooks that fire each turn, subagents for the reading-heavy mapping. The loop is generic. The piece it lacks for your app's behavior is a check it can trust. That is Hover.

Wire it up: npm i -g @hover-dev/mcp@latest, then hover-hook install. More at gethover.dev.