1 min lesson
Translate user vibes into reliability signals
Compare two rows from "Translate user vibes into reliability signals", then say when each one fits.
Step 1 of 2
Translate user vibes into reliability signals
- User says
- "It hangs sometimes"
- The DS signal behind it
- Tool-call timeout / agent-loop stall
- How you'd measure it
- Timeout rate per tool type, hang duration distribution
- User says
- "It got slow"
- The DS signal behind it
- Latency tail regression, not the mean
- How you'd measure it
- p95/p99 time-to-first-token, segmented by session length
- User says
- "It used to be better"
- The DS signal behind it
- A regression after a deploy or model swap
- How you'd measure it
- Change-point detection on the metric, pre/post-deploy cut
- User says
- "It's flaky"
- The DS signal behind it
- Non-deterministic agent success rate
- How you'd measure it
- Agent-turn success rate with confidence intervals over time
| User says | The DS signal behind it | How you'd measure it |
|---|---|---|
| "It hangs sometimes" | Tool-call timeout / agent-loop stall | Timeout rate per tool type, hang duration distribution |
| "It got slow" | Latency tail regression, not the mean | p95/p99 time-to-first-token, segmented by session length |
| "It used to be better" | A regression after a deploy or model swap | Change-point detection on the metric, pre/post-deploy cut |
| "It's flaky" | Non-deterministic agent success rate | Agent-turn success rate with confidence intervals over time |
Distinguish model regressions from harness regressions out loud. Saying "a quality drop could be the model or the agent loop and I'd attribute by holding the model fixed and watching tool-call success" signals you understand the actual hard problem of this role, not just generic latency dashboards.
Don't invent product internals to the team that built them. If you haven't verified how Cursor's indexing or agent loop works, frame it as a hypothesis you'd test. A wrong confident claim about the harness ends the round faster than honest curiosity ever would.
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Optional practice
Practice: Translate user vibes into reliability signals
QIn the craft round you're asked, "What's broken about Cursor's reliability today?" Which answer best shows the depth this decisive round rewards?