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StaleTrace — stop agents acting on stale state
zahraarman · 2026-06-20 · via Hacker News: Show HN

StaleTrace

When 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.

No LLM call. No graph database. Deterministic temporal logic.

Reconstructed incident · customer_123

Feb 10 · current

address = Austin

Apr 2 · agent action

create_shipment → ship_to: Dallas

Root cause found

The agent shipped to an old address.

How it works

From raw logs to a root cause.

Feed it your agent's tool calls and the facts your systems already record. It does the rest — deterministically.

01

Reconstruct the timeline

Replays your fact events into a temporal ledger, so every value has a window of when it was actually valid.

02

Find the bad fact

Checks what the agent used against what was valid at that moment — surfacing stale, conflicting, or closed-account state.

03

Generate the report

Produces a plain-language root cause, a blast radius, and a copyable incident report your team can act on.

Why it's different

It's a ledger, not a model.

No 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.

Deterministic temporal logic No LLM call No graph database Reproducible verdicts Open-source engine

Pricing

Start free. Grow when it earns it.

No card required yet — we're onboarding early teams by hand.

Free

$0

The open-source engine and the in-browser demo.

  • Local demo, no signup
  • Self-host the engine
  • Community support

Try live demo

Most popular

Starter

$29 /mo

A hosted workspace for one investigator.

  • Hosted ledger + storage
  • Saved incident history
  • Copyable reports

Join waitlist

Team

$199 /mo

Shared incidents and API for your team.

  • Shared workspaces
  • REST API + tokens
  • Log/CRM ingestion

Join waitlist

Enterprise

Custom

SSO, on-prem, and bespoke integrations.

  • On-prem / VPC
  • SSO + audit
  • Priority support

Book a demo

See it on your own incident.

Join the waitlist for a hosted workspace, or book a 20-minute walkthrough with your data.

We'll only email you about early access.