Handler
Hey HN, I’m Vignesh, solo dev. Handler is a Mac app for Codex and OpenCode that adds a review layer while the agent is generating code. Every edit comes with a short explanation: what changed, why it changed, and what it touches. If one edit needs more context, you can open a side chat on just that change and ask follow-ups without derailing the main agent run. The goal is to build a mental model as the code is generated, instead of waiting until the end and reviewing one giant diff cold. It’s the same idea that makes stacked PRs easier to review: smaller, understandable units. Handler…
Handler launched on June 3, 2026 with 89 votes, #460 of 22,647 launches that month and more than 95% of that year's launches.
What it does
Every edit the agent proposes arrives with a built-in explanation and its own chat. Ask why, what it touches, or tell it to redo it. None of it derails the main agent.
Every edit the agent proposes arrives with a built-in explanation and its own chat. Ask why, what it touches, or tell it to redo it. None of it derails the main agent. Every change explains itself, and you can question any one in a side chat without polluting the main context. No more pasting logs to explain what broke. It expands the JSON and points to the exact row that did. Screenshot anything on screen and hand it straight to the agent, right from the command bar. This is the early bird price. It goes up when we ship the unified memory layer: one shared memory across every agent you run, so none of them start fromfrom handler.team
In the maker’s words, at launch
Hey HN, I’m Vignesh, solo dev. Handler is a Mac app for Codex and OpenCode that adds a review layer while the agent is generating code. Every edit comes with a short explanation: what changed, why it changed, and what it touches. If one edit needs more context, you can open a side chat on just that change and ask…
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