OA
FreeIntermediate14 lessons1h 49m

Application Monitoring & Self-Healing Systems

Most apps fail silently until a user complains. This course shows you how to catch problems the moment they happen with Sentry, close the dependency-security gap with GitHub Dependabot, and wire Claude Code in as an on-call engineer that fixes issues for you. Monitoring is not a one-time setup — it is a discipline, and self-healing is the compounding payoff.

Course Content

Module 1: Why Monitoring Matters
15 min

Silent failures cost more than visible ones. Understand the real economics of monitoring and the four signals every app should emit.

  • The Cost of Silent Failures6 min
  • The Monitoring Pyramid6 min
  • Module Quiz+25 XP
Module 2: Sentry — Capture Errors
15 min

Install Sentry, capture your first error, and see how to tie errors to specific releases so regressions are obvious.

  • Install Sentry and Capture Your First Error6 min
  • Source Maps and Releases6 min
  • Module Quiz+25 XP
Module 3: Sentry — Observability
15 min

Beyond errors: trace slow requests through your stack and add the context that makes every issue debuggable.

  • Performance Traces6 min
  • Custom Context and Breadcrumbs6 min
  • Module Quiz+25 XP
Module 4: Sentry — Alerting
15 min

An alert that does not reach a human is data, not a signal. Build alerting that wakes the right person at the right time without crying wolf.

  • Alert Rules That Don't Cry Wolf6 min
  • Ownership and Escalation6 min
  • Module Quiz+25 XP
Module 5: Dependabot — Dependency Security
15 min

Most production security incidents come from unpatched dependencies. Dependabot is GitHub's free, automated signal stream for this entire class of problem.

  • Setup and the Dependabot PR Workflow6 min
  • Auto-Merge Policies6 min
  • Module Quiz+25 XP
Module 6: Self-Healing Agents
17 min

Close the loop. A Sentry issue or Dependabot PR triggers Claude Code to investigate and, when safe, produce the fix automatically.

  • Sentry Issue → Claude Code Auto-PR7 min
  • Dependabot PR → Agent Review and Merge7 min
  • Module Quiz+25 XP
Module 7: Ongoing Discipline
17 min

Monitoring is a system only if you maintain it. The weekly rituals and SLO practices that separate teams who monitor from teams who react.

  • The Weekly Review Ritual7 min
  • SLOs and Error Budgets7 min
  • Module Quiz+25 XP

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