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Learning: Human-in-the-Loop Systems

How to Use This Page

  • Treat review routing as a systems decision.
  • Persist approval state transitions.
  • Measure reviewer load and SLA health.

Lesson 1: Fundamentals

Learn confidence and risk-based routing for approval workflows.

What You Learn

  • How to decide auto-approve vs human review
  • Why queue durability is required for reliability
  • How to separate recommendation from final decision

Walkthrough

  1. Define routing thresholds for confidence and risk.
  2. Send borderline cases into a review queue.
  3. Store final reviewer decisions with metadata.

Try It Yourself

  • Lower confidence threshold and observe queue volume changes.
  • Add reason codes for reviewer decisions.
  • Verify restart-safe queue processing.

Lesson 2: Intermediate Patterns

Learn deterministic resume behavior after approval outcomes.

What You Learn

  • How to resume from approved or rejected branches
  • Why full state transition logs matter for audits
  • How SLA timers prevent queue stagnation

Walkthrough

  1. Implement resume logic for approve/reject paths.
  2. Log all transitions with actor and timestamp.
  3. Add aging checks and SLA alerts.

Try It Yourself

  • Simulate delayed approvals and test timeout behavior.
  • Compare outputs before and after human edits.
  • Build a daily summary of queue health metrics.

Lesson 3: Production Patterns

Learn threshold tuning, reviewer balancing, and audit reporting.

What You Learn

  • How to tune thresholds from false-positive and false-negative trends
  • Why reviewer load balancing improves consistency
  • Which audit views support compliance and governance

Walkthrough

  1. Analyze historical decisions by category.
  2. Tune thresholds and test impact on queue size and quality.
  3. Generate periodic audit reports.

Try It Yourself

  • Run a simulation before applying threshold changes.
  • Add reviewer assignment logic to spread load evenly.
  • Propose one policy change backed by observed metrics.

Code Examples

  • Starter script: docs/starter/stage07_human_loop.py
  • Stage architecture notes: docs/roadmap/stage-07-approval-and-escalation-design/architecture.md