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ctxopt
One context config for Claude Code, Codex, Cursor & more
ctxopt gives your AI coding agent a map of your project instead of forcing it to re-read everything each session. Free, open-source config for Claude Code, Codex, Antigravity, and Cursor — measured on a real project (64.5% less context on exploration tasks), not marketing numbers.
Hey PH 👋
I built ctxopt because I kept running out of context credits on Claude Code before finishing my workday — turns out it's not the model, it's that every task forces the agent to re-read a chunk of your project it's already seen.
Before writing a single line of marketing copy, I tested it on a real production project. The honest results: 64.5% less context on exploration tasks, but on one specific task the result came out roughly even — I left that in, because a tool that claims to "always save" isn't one I'd trust either.
It's free and open source — works with Claude Code, Codex, Antigravity, and Cursor through the AGENTS.md standard. There's also an optional paid guide pack if you want the step-by-step walkthrough instead of figuring it out yourself.
Happy to answer anything about how it works, what it doesn't do, or where it falls short — genuinely want the feedback.
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About ctxopt on Product Hunt
“One context config for Claude Code, Codex, Cursor & more”
ctxopt was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #73 on the daily leaderboard. ctxopt gives your AI coding agent a map of your project instead of forcing it to re-read everything each session. Free, open-source config for Claude Code, Codex, Antigravity, and Cursor — measured on a real project (64.5% less context on exploration tasks), not marketing numbers.
ctxopt was featured in Developer Tools (518.9k followers), GitHub (41.4k followers) and Vibe coding (660 followers) on Product Hunt. Together, these topics include over 112.2k products, making this a competitive space to launch in.
Who hunted ctxopt?
ctxopt was hunted by Alejandro Gutiérrez. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Alejandro Gutiérrez