{"slug": "show-hn-staletrace-a-temporal-ledger-that-catches-stale-state-agent-bugs", "title": "Show HN: StaleTrace – A temporal ledger that catches stale-state agent bugs", "summary": "StaleTrace, a new tool that uses deterministic temporal logic to catch stale-state bugs in AI agents, launched on Hacker News. It reconstructs what facts were valid at the time of an agent's action, surfacing stale or conflicting state without LLM calls or graph databases. The tool generates incident reports and is currently onboarding early teams by hand.", "body_md": "StaleTrace\n\nWhen an agent fails in production, it usually isn't a reasoning bug — it acted on a fact that had already changed. StaleTrace reconstructs what was true at the time, finds the stale or conflicting fact, and generates an incident report.\n\nNo LLM call. No graph database. Deterministic temporal logic.\n\nReconstructed incident · customer_123\n\nHow it works\n\nFeed it your agent's tool calls and the facts your systems already record. It does the rest — deterministically.\n\nReplays your fact events into a temporal ledger, so every value has a window of when it was actually valid.\n\nChecks what the agent used against what was valid at that moment — surfacing stale, conflicting, or closed-account state.\n\nProduces a plain-language root cause, a blast radius, and a copyable incident report your team can act on.\n\nWhy it's different\n\nNo guesses, no embeddings, no second LLM to audit the first. The same inputs always produce the same verdict — which is what you want when you're explaining a production failure. The engine is **ValidMemory**, a zero-token temporal fact ledger.\n\nPricing\n\nNo card required yet — we're onboarding early teams by hand.\n\nJoin the waitlist for a hosted workspace, or book a 20-minute walkthrough with your data.\n\nWe'll only email you about early access.", "url": "https://wpnews.pro/news/show-hn-staletrace-a-temporal-ledger-that-catches-stale-state-agent-bugs", "canonical_source": "https://stale-trace.vercel.app/", "published_at": "2026-06-19 23:03:36+00:00", "updated_at": "2026-06-19 23:38:02.821776+00:00", "lang": "en", "topics": ["ai-agents", "ai-tools", "ai-safety", "developer-tools"], "entities": ["StaleTrace", "ValidMemory"], "alternates": {"html": "https://wpnews.pro/news/show-hn-staletrace-a-temporal-ledger-that-catches-stale-state-agent-bugs", "markdown": "https://wpnews.pro/news/show-hn-staletrace-a-temporal-ledger-that-catches-stale-state-agent-bugs.md", "text": "https://wpnews.pro/news/show-hn-staletrace-a-temporal-ledger-that-catches-stale-state-agent-bugs.txt", "jsonld": "https://wpnews.pro/news/show-hn-staletrace-a-temporal-ledger-that-catches-stale-state-agent-bugs.jsonld"}}