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Crescent Trace
Find where your AI agent got stuck, in your browser
Zero setup and fully private: paste a trace and get the exact failing step, loop type and tokens wasted in under a second, all in your browser. Deterministic rules instead of an LLM; works with LangGraph, OpenAI and OpenTelemetry traces, and is benchmarked on 148 human-labelled agent failures. Also available: "Ask the dragon," an optional AI second opinion for Claude users. It reviews only the flagged steps, explains the root cause, and catches reasoning mistakes the rules can't see.
Hi everyone!
I've spent the last few years building production AI agents, including an SRE agent that investigates incidents. The most painful part was always the same: a run fails, and you scroll through hundreds of lines of trace to find where it went wrong. Was it a loop? A broken tool? Did it just give up?
Crescent Trace does that first pass for you in under a second. Paste a trace (LangGraph, OpenAI messages, OpenTelemetry/Langfuse, or JSONL), and it shows:
- the exact step where your agent got stuck
- what kind of failure it was (loop, retry storm, crashed tool, step limit)
- how many tokens the loop wasted
- what to fix
It runs entirely in your browser, so your traces stay private. No signup, no API key.
Try the "Retry storm" example to watch the dragon walk the trail and stop at the loop.
It catches mechanical failures, not reasoning mistakes, so I'd love your feedback, especially traces it gets wrong. What should it detect next?
Github: https://github.com/nischita44/cr...
About Crescent Trace on Product Hunt
“Find where your AI agent got stuck, in your browser”
Crescent Trace was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #157 on the daily leaderboard. Zero setup and fully private: paste a trace and get the exact failing step, loop type and tokens wasted in under a second, all in your browser. Deterministic rules instead of an LLM; works with LangGraph, OpenAI and OpenTelemetry traces, and is benchmarked on 148 human-labelled agent failures. Also available: "Ask the dragon," an optional AI second opinion for Claude users. It reviews only the flagged steps, explains the root cause, and catches reasoning mistakes the rules can't see.
On the analytics side, Crescent Trace competes within Productivity, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.7M followers on Product Hunt. The dashboard above tracks how Crescent Trace performed against the three products that launched closest to it on the same day.
Who hunted Crescent Trace?
Crescent Trace was hunted by nischita sadanand. 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.
For a complete overview of Crescent Trace including community comment highlights and product details, visit the product overview.
nischita sadanand