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Agent-watchdog
Runtime loop detection for LangGraph agents
Multi-agent LLM pipelines fail quietly — agents rephrasing the same argument forever, silent deadlocks, graphs that cycle without an exit. Most tools (LangSmith, AgentOps) show you this after the fact. Agent Watchdog intervenes at runtime, like a circuit breaker — watching message similarity and tool-call patterns to halt stuck LangGraph runs before you burn tokens. Built by PengKernel LLC: npm install agent-watchdog.
Hey Product Hunt 👋
I built Agent Watchdog after watching my own LangGraph pipelines quietly burn through tokens — two agents debating in circles, or a graph stuck waiting on a condition that never resolves. Standard tracing tools (LangSmith, AgentOps) are great for post-mortems, but I wanted something that intervenes while it's happening, not after.
It watches message similarity and tool-call patterns across a sliding window, and halts the run the moment it detects an argument loop, a repeated tool call, or a stuck iteration — before you're staring at a $40 API bill for a conversation going nowhere.
Just shipped a new version with tool-call loop detection and state-regression checks.
Would love feedback, especially from anyone running multi-agent systems in production — what failure modes have you hit that this doesn't catch yet?
About Agent-watchdog on Product Hunt
“ Runtime loop detection for LangGraph agents”
Agent-watchdog was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #127 on the daily leaderboard. Multi-agent LLM pipelines fail quietly — agents rephrasing the same argument forever, silent deadlocks, graphs that cycle without an exit. Most tools (LangSmith, AgentOps) show you this after the fact. Agent Watchdog intervenes at runtime, like a circuit breaker — watching message similarity and tool-call patterns to halt stuck LangGraph runs before you burn tokens. Built by PengKernel LLC: npm install agent-watchdog.
On the analytics side, Agent-watchdog competes within Developer Tools and Artificial Intelligence — topics that collectively have 998.9k followers on Product Hunt. The dashboard above tracks how Agent-watchdog performed against the three products that launched closest to it on the same day.
Who hunted Agent-watchdog?
Agent-watchdog was hunted by Shuopeng Zhou. 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 Agent-watchdog including community comment highlights and product details, visit the product overview.
Shuopeng Zhou