From Reactive Agents to Proactive AI

From Reactive Agents to Proactive AI

1. Why Heartbeat Architectures Matter
2. The promise of this book
3. Preface: the question nobody asked
4. How to read and build
5. A note on attractive systems

1. Bounded Autonomy

1. Four capabilities, one operating contract
2. Proactivity is not exclusive to a timer
3. The value of doing nothing
4. Where a model earns its place
5. A first autonomy ladder
6. Build decision: define the envelope first

2. The AI Control Plane

1. The component map
2. Architecture A: the scheduled investigator
3. Architecture B: events plus reconciliation
4. Architecture C: durable workflow with human decisions
5. Architecture D: specialist workers
6. State is part of the interface
7. Build decision: choose the smallest architecture that preserves state

3. Time, Context, and Memory

1. Choose cadence from the problem
2. Scheduling is not exclusive ownership
3. An evidence envelope
4. Context is a retrieval problem
5. Memory has several jobs
6. Forgetting and quiet operation
7. Build decision: make time testable

4. Planning Under Authority

1. Investigate with competing hypotheses
2. Turn prose into a proposal
3. Risk tiers as a conversation with the owner
4. Enforce budgets outside the prompt
5. Idempotency is about effects
6. Verification and compensation
7. The trust boundary around a model
8. Build decision: review one action end to end

5. The Incident That Nobody Prompted

1. Observe symptoms before explanations
2. A sequence that narrows uncertainty
3. Decide what the agent may do
4. Verify recovery without declaring causality too soon
5. Four neighboring incidents
6. Product opportunity and measurement
7. Build exercise: replay the night shift

6. The Repository That Maintains Itself

1. Begin with the maintenance inbox
2. Walk one vulnerability to a reviewable change
3. Code execution is a trust boundary
4. Tests are evidence with limits
5. The review packet is the product
6. Product opportunity and economics
7. Build exercise: construct a safe repair lane

7. Cloud Capacity With a Business Case

1. Look for waste systematically
2. Build a capacity envelope
3. Separate estimated and realized savings
4. Apply changes in stages
5. Portfolio management for recommendations
6. Product opportunity and trust
7. Build exercise: challenge the cheapest plan

8. Security Without Unbounded Power

1. Build the security picture
2. Design containment before an incident
3. Rotation is a workflow
4. Protect the operator from the evidence
5. Fail closed without becoming blind
6. Product opportunity and evaluation
7. Build exercise: the suspicious login that was legitimate

9. Data That Arrives Correctly

1. Monitor the contract, not only the job
2. Trace the failure upstream
3. Retrying safely means understanding side effects
4. Publication is an action
5. Schema evolution and semantic drift
6. Privacy and query boundaries
7. Product opportunity and measurement
8. Build exercise: recover a missing partition

10. Investigating Business Drift

1. Define the denominator
2. Segment before proposing a cause
3. Correlation guides investigation
4. Choose interventions that match authority
5. The other business signals
6. Estimate value without inventing revenue
7. Product opportunity and build exercise

11. Build a Heartbeat Agent

1. Run the first cycle
2. Read the modules as boundaries
3. Understand two identities
4. Exercise approval
5. Reproduce the dangerous timeout
6. Read failure as a first-class result
7. Move toward production in explicit steps
8. Build exercise: replace one boundary

12. From Reliable Operator to Paid Product

1. Choose a narrow first market
2. Compare the six opportunities
3. Run a pilot with a stopping rule
4. Evaluate the whole loop
5. Observe the observer
6. Calculate the cost of always being awake
7. Unit economics without wishful arithmetic
8. Price the outcome and constrain the workload
9. A practical 90-day path
10. Build decision: sell one result you can defend

Conclusion: The Quiet Operator

Appendix A. The Operator Design Workbook

1. Worksheet 1: the operating envelope
2. Worksheet 2: the action contract
3. Worksheet 3: the evidence ledger
4. Worksheet 4: evaluation cases
5. Worksheet 5: customer value and delivery cost
6. Worksheet 6: the launch decision

Appendix B. A Working Vocabulary

Appendix C. Sources and Further Reading

1. Publishing references
2. About this edition