Sentinel
Sentinel is the operational assurance layer of CAELOMERE. It records and presents operational state — running, waiting, approved, blocked, completed. It shows who acted, under what authority, what decision was made, and what happened next. Sentinel is the live view of governed work in progress.
What is happening, and why.
Sentinel is not a log. Logs are written after the fact, by whoever happened to be running. Sentinel is the operational state of governed work in progress — a live, structured account of what is running, what is waiting, what has been approved, what has been blocked, and what has been completed.
For every item of consequential work, Sentinel shows four things: who acted, under what authority, what decision was made, and what happened next. This is the operational assurance that the client, the approver, and the auditor all need.
- Shows current operational state for every governed work item
- Names the actor and the authority behind each action
- Presents the Guardian decision that shaped the outcome
- Provides a live, defensible view of work in progress
Five states, always explicit.
Every governed work item has exactly one state at any moment. Sentinel makes that state visible — not as a log entry, but as the current operational truth.
Work in progress
The authorised work is executing. Authority is current, Guardian has allowed it, and the work is proceeding under the stated controls.
Blocked on approval or input
The work is paused — either waiting on a human approver, an external input, or a scheduled window. Sentinel shows what it is waiting for.
Authorised, not yet executing
Guardian has allowed the action, but the work has not yet begun — for example, it is queued for a defined start time.
Refused or halted
Guardian denied the action, or the work was halted mid-execution. Sentinel records the reason and the authority behind the decision.
Work finished, record sealed
The work is finished, the outcome is returned to FORGE, and the durable record is sealed into VAULT. Sentinel keeps the completed state visible for as long as it is needed.
What Sentinel shows for every item.
For every governed work item, Sentinel presents four things — always together, never separately.
The actor
The human, service or autonomous system that initiated or performed the action — identified through Passport.
The authority
The specific, scoped authority the actor held at the moment of action — and its validity at that time.
The decision
The Guardian outcome — allow, allow with limits, require human approval, or deny — with its reasoning.
The outcome
The operational result — completed, blocked, waiting, or escalated — and the state the work now holds.
Sentinel and VAULT run in parallel.
After Authorised Work begins, Sentinel records the live operational state while VAULT preserves the durable evidence. Together they close the loop back to FORGE.
See operational assurance in action.
One platform journey, from problem to proven outcome, using synthetic data only. See Sentinel track state and decision at every step of the governed route.