debug · 20 recipes
Stop fires. Find regressions. Catch silent bugs.
Agent-first recipes for catching bugs before customers do. Each one is a paste-ready prompt that turns your agent into an investigator, a triager, and an oncall responder.
- intermediate · 2 minutes ★ featured
Track crash-free user rate per app version
Distinct users who hit a crash divided by DAU, per app version. The industry-standard mobile health metric — surface version-by-version drops fast.
#errors#mobile-app#crash-free-rate#app-version#sentry-alternative - beginner · 30 seconds ★ featured
Diagnose a customer complaint in 30 seconds
Paste a customer message. The agent pulls their session, finds the error they hit, walks their funnel, and tells you what to reply.
#errors#analytics#customer-support#replay#distinct-id - beginner · 30 seconds ★ featured
Find what broke after your last deploy
Diff error fingerprints before and after the latest deploy SHA. Surface regressions in 30 seconds, including a candidate fix.
#errors#deploys#post-deploy#oncall#regression - intermediate · 2 minutes ★ featured
Rank errors by revenue impact, not raw count
Multiply users-affected by their plan ARR to surface the bugs costing real money. Stop triaging by event volume.
#errors#revenue#triage#account-health#b2b - intermediate · 2 minutes
Mobile background-sync failure monitoring
Background sync, refresh, prefetch jobs fail silently and degrade UX. Group failures by task_name and network_type to find the patterns.
#errors#mobile-app#background-jobs#oncall#infra - intermediate · 2 minutes
Find IE/Safari/old-Chrome-only crashes
Split client-side errors by browser and version. Surface fingerprints concentrated in one engine — usually older Safari or a stale Chromium.
#errors#browser#client-side#frontend#sentry-alternative - intermediate · 2 minutes
Track static-asset 404s per release
Group asset 404s by URL and deploy SHA. Catch stale CDN caches and missing hashed bundles before users see a blank page.
#errors#cdn#release#deploys#frontend - intermediate · 1 minute
Diagnose CORS errors after a deploy
Find CORS-blocked requests grouped by origin and endpoint. Surface the misconfigured Access-Control-Allow-Origin from a recent service move.
#errors#cors#deploys#post-deploy#infra - advanced · 2 minutes
Find connection-pool / timeout patterns in errors
Surface DB connection exhaustion, statement timeouts, and deadlock retries. Find the original slow query starving everything else.
#errors#database#infra#scaling#oncall - beginner · 30 seconds
Find what broke after the last npm update
Tie new error fingerprints to the deploy that bumped dependencies. Spot the silent regression nobody intended to ship.
#errors#regression#dependencies#deploys#post-deploy - advanced · 3 minutes
Which user action triggers which error?
Join errors and analytics events by distinct_id and timestamp. For each top fingerprint, surface the user action that immediately preceded it.
#errors#analytics#cross-signal#sentry-alternative#posthog-alternative - beginner · 1 minute
Compare error rates between staging and prod
Diff fingerprints between staging and production. Find what's already breaking in staging that the next deploy will carry into prod.
#errors#environments#pre-deploy#staging#oncall - intermediate · 1 minute
Diagnose a flaky CI test from its error payloads
Group test failures across CI runs by error pattern. Get a verdict — real bug or timing — without the manual archaeology.
#errors#ci#testing#oncall#flaky-tests - intermediate · 1 minute
Catch display-vs-actual-stock mismatches
Find inventory sync errors trending up by warehouse and SKU before customers do. The 'in stock' display lie is one of the highest-cost bugs in ecommerce.
#errors#inventory#ecommerce#infra#oncall - intermediate · 1 minute
Detect a 429-spike before customers tweet about it
Trend HTTP 429 responses week-over-week and flag spikes. Catch third-party rate-limit tightening or a runaway customer integration.
#errors#rate-limiting#early-warning#oncall#datadog-alternative - beginner · 2 minutes
Find the products driving refunds
Compute refund rate per SKU over 90 days. One bad product can poison your margins — refund-rate-per-SKU separates the herd from the outliers.
#analytics#refunds#ecommerce#quality#customer-support - intermediate · 2 minutes
Diagnose a bug from the session replay, not the stack
Customer reported a checkout error. Pull their session replay, read what they did in the 60s before the error. Some bugs only make sense when you see the user's screen.
#errors#replay#customer-support#debugging#posthog-alternative - beginner · 10 seconds
Find the bugs 5 people hit but no one reported
Surface real errors that affect multiple users but never get filed as tickets. The biggest source of silent churn.
#errors#oncall#retention#saas#sentry-alternative - intermediate · 2 minutes
Diagnose Stripe `card_declined` patterns
Group Stripe payment failures by decline_code. Surface the top causes and the customers affected. Different decline = different fix.
#errors#stripe#ecommerce#payments#customer-support - intermediate · 1 minute
Find the cron that fails every Sunday at 3am
Bucket errors by hour-of-day and day-of-week to surface periodic failures hiding inside normal noise.
#errors#cron#time-series#ops#infra
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