Where Postcept fits, and where it doesn't
Authorization checks whether an agent may act. Observability shows what happened in the trace. Postcept verifies whether the action actually completed correctly in the system of record. These categories are complementary, Postcept adds Proof-of-Completion on top of your existing stack.
Why the trace isn’t enough
Independent research, “From Confident Closing to Silent Failure” (arXiv:2606.09863), found that LLM-judge monitors detect false success at no better than 0.65 AUROC, and only 0.54 on API-call traces: near chance. The judges anchor on the agent’s confident closing language as evidence of completion, and a false success produces exactly that language. Whether the action actually happened is a different question, and it can only be answered against the system of record.
| Category | What it answers | Where Postcept is different |
|---|---|---|
| Authorization | Can the agent act? | Postcept verifies whether the action completed correctly. |
| Observability | What happened in the trace? | Postcept checks the source of truth. |
| Evals | Did behavior look successful? | Postcept verifies business state. |
| Workflow engines | How should retries and execution run? | Postcept proves external completion. |
| Reconciliation | What mismatched later? | Postcept verifies at the agent-action level. |
| Postcept | Did the action actually complete correctly? | Deterministic Proof-of-Completion against the system of record. |
The post-execution camp
Three camps surround agent reliability. Authorization gates actions before they run. Observability and evals inspect the trace during and after. A newer post-execution camp, tools such as DriftGentic, checks the system of record after the agent acts, which is the same question Postcept asks.
Postcept’s distinction inside that camp is the shape of the proof. Verification is independent of the agent, runs continuously, re-checked over time, not once, and rolls up into a single reliability metric, your Verified Completion Rate. Each check emits an auditor-grade signed receipt, anchored in a public transparency log: evidence you can hand a risk team, not just a dashboard you watch.
What Postcept is not
Postcept is not a generic AI governance platform, an observability tool, a trace viewer, an LLM judge, an agent authorization layer, a workflow engine, a fintech reconciliation tool, or an agent security scanner. It is one focused primitive: deterministic, action-level verification against the system of record.
The trace is not the truth. The system of record is.
Add Proof-of-Completion to your stack.
Keep your agent framework, workflow engine, and approvals. Postcept verifies completion on top.