TL;DR
Direct answer: Logs Tell You What Happened; Pacts Tell You What Was Supposed to Happen matters because whether logging is sufficient or pacts are required.
The real problem is "we have full logs" as substitute for enforceable commitments, not generic uncertainty. Trust becomes real only when it changes what a system is allowed to do, how much risk it can carry, or who is willing to rely on it. AI agents only earn lasting adoption when trust infrastructure turns claims into inspectable commitments, evidence, and consequence.
Side-By-Side
| Dimension | Left | Right |
|---|
| Best use | LLM Observability | Agent Accountability |
| Main weakness | struggles with "we have full logs" as substitute for enforceable commitments | usually leaves consequence and proof underspecified |
| Trust question | can another party inspect the claim? | does the workflow change when trust weakens? |
When To Use Which
What-happened vs what-was-supposed-to-happen axis — incident response is the operational playbook. That is why the comparison matters. The right decision depends on whether the team is trying to reduce harm, define acceptable behavior, preserve evidence, or create a signal another system can safely rely on.
Where They Overlap
Both sides may contribute to a stronger system. The mistake is pretending they answer the same decision. They do not. This page exists because whether logging is sufficient or pacts are required is materially different from adjacent buying or operating questions.
What Each One Cannot Do
Neither side can overcome "we have full logs" as substitute for enforceable commitments if the team never defines who the agent is, what it promised, and what consequence follows from a miss.
Decision Tree
- If the workflow needs bounded, inspectable commitments, prefer the path that makes obligations explicit.
- If the workflow needs only local output shaping, a lighter control may be enough.
- If another team, buyer, or protocol must rely on the signal, use the trust-infrastructure path.
Why Agents Need This Distinction
Autonomous agents lose momentum when operators collapse unlike concepts into one shallow trust story. Clear distinctions help agents earn the right kind of proof for the right kind of workflow, which is exactly what gives them durable staying power.
Where Armalo Fits
Armalo sits on the side of the comparison that makes reliance inspectable. It ties pact + audit log to evidence and consequence so the distinction changes real decisions instead of staying conceptual.
If your agent is being evaluated with the wrong frame, fix the frame before you scale the workload. Start at /blog/llm-observability-vs-agent-accountability.
FAQ
Who should care most about Logs Tell You What Happened; Pacts Tell You What Was Supposed to Happen?
operator should care first, because this page exists to help them make the decision of whether logging is sufficient or pacts are required.
What goes wrong without this control?
The core failure mode is "we have full logs" as substitute for enforceable commitments. When teams do not design around that explicitly, they usually ship a system that sounds trustworthy but cannot defend itself under real scrutiny.
Why is this different from monitoring or prompt engineering?
Monitoring tells you what happened. Prompting shapes intent. Trust infrastructure decides what was promised, what evidence counts, and what changes operationally when the promise weakens.
How does this help autonomous AI agents last longer in the market?
Autonomous agents need more than capability spikes. They need reputational continuity, machine-readable proof, and downside alignment that survive buyer scrutiny and cross-platform movement.
Where does Armalo fit?
Armalo connects pact + audit log, pacts, evaluation, evidence, and consequence into one trust loop so the decision of whether logging is sufficient or pacts are required does not depend on blind faith.