Transaction-Monitoring Tuning AI Agent

What this agent does

Builds the evidence a threshold change rests on

A scenario inventory is pulled in with the risk assessment, the alert history and each threshold's change record.

A population is reconciled to the payment and core extracts, so activity outside the monitored set is visible.

Reason

A scenario is tuned by sampling above the current line and below it, and both samples are drawn and recorded.

A threshold moves against a documented methodology, in the operative language of the December 2024 consent order.

A model claim is read against the guidance reissued on 17 April 2026, which puts agentic tools outside its scope.

Decide

A fall in alert volume is checked against the feed before anyone reads it as a threshold behaving well.

A change pack reaches the named owner, who approves whether the threshold moves before production sees it.

Out

A tuning study is retained with its samples, its version and the approval, ready for the validator who signs.

Writes run only inside the approval boundaries agreed at implementation, never on a production threshold.

→ Product statement

The agent documents and tests; the named owner approves the threshold, and an independent validator signs the report.

Example workflow

One scenario, inventory to approval

AgentHuman

1Tuning round openedScenario inventory, risk assessment, alert history or consent-order article

2Population assembledAlerts, cases, transactions and segment definitions, each with its source system

3Study draftedAbove- and below-the-line samples, coverage map and confidence

4Controls appliedReconciliation checks, sample-sufficiency checks, coverage checks and confidence threshold

No human action required

Stages 1 to 4 run unaided, and nothing is changed at any of them — the agent is testing, and the owner's lane opens at the confidence gate.

5DecisionBranches at the confidence threshold

High confidence

Goes to the monitoring owner to approve.

Low confidence

Adds a model-risk read first.

Owner approval

The study is held with its samples, its open questions and the confidence.

Approve · Amend · Send to model-risk review

Approved — change authorised▼

6Change record updatedOnly where write access and approval policy allow it

7Outcome evaluatedAlert-to-case conversion, productive alerts below the line and validation findings

After the fact

A threshold moved on a wrong study leaves activity no alert saw, found later in a look-back.

What should not run autonomously

Human approval stays in control

Outside the boundary — human approval required8 items

Authorising a threshold, rule or filter change.

Writing a threshold into the production monitoring platform.

Deciding that activity below the line is not productive.

Signing the validation report or opining on the model.

Automation boundaryAgent acts unaided

✓Assemble the scenario inventory, the change record.

✓Draw above- and below-the-line samples and record how each was drawn.

✓Map products, channels, rails and segments to scenarios.

✓Check the study for completeness and hold it for the named owner.

Writes stay inside the boundaries set at implementation, never on a production threshold.

Closing a prior validation finding.

Sizing alert volume to the review team's capacity.

Auto-closing or dispositioning an alert.

Changes to tuning, sampling or approval rules.

Example output

One scenario, annotated

Everything the agent tests is attached to the scenario it was drawn from.

Tuning study output · single scenarioIllustrative example

Scenario

Tested line

Methodology

Source of population

Confidence

Approval

Rapid movement of funds

Aggregate credits cleared inside the look-back window

OCC AA-ENF-2024-56 §VIII

Payment-system extract

91%

Owner signs before release

As receivedTaken from the monitoring, payment and core extracts — nothing on this side is written by the agent.

Evidence used Above-the-line sample Below-the-line sample Scenario change record

Why this methodologyIt is the standard the consent order sets, not a test the agent designed for the bank.

ActionApproveAmendSend to model-risk review

What the score decidesBelow the configured threshold the study picks up a model-risk read before it.

Value

Where AI adds value

The same four claims, placed at the point in the workflow where each one applies.

Where the value landsValue 01 – 04

Every scenarioFrom the scenario record

03Testing

Test the line from both sides

Sample above the current threshold and below it, and record how each sample was drawn.

01Approved path

A threshold is a policy choice

Every threshold decides how much activity the bank will not look at.

02Human review

Not the filing decision

Monitoring documentation is examinable and goes to a validator; SAR content cannot leave the perimeter.

04Build an evidence trail

The scenario, the testing run against it and the owner who approved stay on the record.

Integrations

Typical integrations

Five system groups connect to the same agent. Which of them are in scope is decided in discovery.

Monitoring systemsActimize · Verafin
SAS · Oracle FCCM

Model riskValidation workpapers
Issue and finding tracking

Core and paymentsFIS · Fiserv · Jack Henry
Wire and ACH extracts

Agent

Monitoring tuning & documentation

Reads the scenarios
Tests the thresholds
Holds for approval

Change and evidenceChange tickets · ITSM
Evidence archive · retention

Observability & evaluationOpenTelemetry · Langfuse
Supported monitoring/evaluation sources

Integration availability depends on the client's existing systems and API access.

Agent controls

Six layers between the model and the threshold

Six layers between the model and the alert. What passes them all is set out in the map below.

L6 · Outermost — last line of defenceInward → L1 · closest to the model

L6Rollback / safe modeHold tuning at study-only when evaluation or production signals degrade.Roll back

L5Version monitoringTrack model, prompt, sampling-rule and segment-definition changes.Track

L4Study traceabilityRecord the samples, the study, the amendments and the approval time.Record

L3Owner approvalHold studies for the named owner; the gate governs release, not whether the threshold is right.Gate

L2Policy guardrailsTest studies against sampling, coverage and reconciliation rules; a failure returns the study.Restrict

L1Confidence thresholdsRoute low-confidence studies to a model-risk read before the owner sees them.Require review

Model coreStudy produced — samples, coverage map, open questions and confidence

L1 – L2Test whether a study may stand

L3Puts the change in the owner's hands

L4 – L5Keep the scenario and the testing behind it

L6Drops to threshold reporting when signals degrade

How Nestack evaluates it

Evaluate the tuning workflow — not only the finished study.

Coverage runs the whole depth of the workflow, and every layer is cut by slice.

Surface — the study the validator reads

Depth of coverage ▼

E1Final-output evaluationDid the study test the population the scenario actually covers?

E2Step-level evaluationDid the agent use the right segments, samples and change record?

E3Tool evaluationDid it read and write the correct scenario and the correct field?

E4Confidence calibrationDo low-confidence studies actually attract more owner amendments?

E5Slice evaluationHow does performance change across specific scenario families?

E6Business outcomeHow many studies were amended, and how many findings were reopened?

Floor — the outcome the bank answers for

Failure modes

Where each failure originates in the agent

Seven failure modes, placed at the stage each one originates.

Agent lifecycleDirection of processing →

01 · Retrieval1 mode

TM-03

Feed truncation unseen

A rail drops a message type and volume falls.

Stage gathersScenario inventory, alert history and change records

02 · Reasoning2 modes

TM-04

Null read as negative

A too-small below-the-line sample reports nothing.

TM-06

Coverage from inventory

The map is built from scenarios, not from risk.

Stage proposesThe samples, the coverage map and the confidence

03 · Tool / write2 modes

TM-02

Segment mismatch

The study and the change ticket scope differ.

TM-05

Pack carried forward

Last cycle's write-up describes logic since changed.

Stage writesOnly where write access and approval policy allow it

04 · Output1 mode

TM-01

Unmonitored population

Activity never reaches the engine to be sampled.

Stage returnsThe study the owner approves and the validator reads

05 · Change / Version1 mode

TM-07

Silent tuning regression

A model or rule change widens what a study will support.

Stage tracksModel, prompt, sampling rules and segment config

Sev-1 · a parameter written to production Sev-2 · a wrong study reaches the owner Sev-3 · feed degrades, study holds

See the complete Banking failure-mode catalogue →

Affected slices

One scenario family can carry most of the rework

A book-wide alert-conversion rate can look settled while a few scenario families absorb most of the amendments and rework. Nestack reports the owner-amendment rate by scenario, not only in total.

Slice performance — reported separately, not only in aggregateIllustrative example

Slice	Failure rate	Lift	Status
Cross-border wire scenarios	9.2%	3.8×	Review
Fintech programme accounts	6.6%	2.7×	Review
Correspondent activity	4.4%	1.8×	Watch
Cash structuring scenarios	2.4%	1.0×	Normal

Bar: owner-amendment-rate lift vs. the structuring-scenario baseline · scale 0–4.0× · tick marks the 2.0× review threshold 2 of 4 slices over threshold

Evidence-linked improvement

Every cycle ends with one more test

A cycle is closed when the untested threshold is a case the next release must survive. That suite is what the next tuning round is measured against.

Improvement cycle · five stagesSwitchback — the path turns at Improve and returns at Learn

01Detect

Owner-amendment rate rises in a scenario family.

02Diagnose

The rule nobody had retested since it was written is read back until the cause narrows to one.

03Improve

The change leaves with a version, and the scenarios that found it attached.

04Verify

While a touched threshold case is unresolved, the release does not open.

05Learn

It becomes a fixture of the suite, and the tuning rules follow it.

Learn → DetectThe return edge. The next round is measured against a suite one case longer.

Typical build scope

Twelve workstreams across six weeks

The build scope read against the delivery timeline. Week structure follows the six-week plan — discovery, sources, testing workflow, evaluation, integration, then production validation and handover.

Workstream Week 1Week 2Week 3Week 4Week 5Week 6

01Tuning workflow discovery and boundary definition.

02Monitoring and payment source assessment.

03Scenario, threshold and segmentation rule mapping.

04Population ingestion and reconciliation.

05Sampling logic and evidence binding.

06Confidence scoring and exception routing.

07Owner approval workflow.

08Monitoring-platform integration.

09Scenario and testing cases.

10Guardrails and approval controls.

11Alert-trail instrumentation.

12Deployment, documentation and Agent Care handover.

12 workstreams · 6 weeks · bar shows the weeks a workstream is active — several run in parallel Final scope and sequence confirmed in discovery

Engagement tiers

What each tier includes

Rows are the capabilities named in each tier's scope. Higher tiers include everything below them.

Capability✓ in scope · — not at this tier PilotOne scenario family, one team ProductionProduction monitoring systems AdvancedMultiple entities / platforms

Introduced at Pilot

Testing to your scenario record✓✓✓

Owner approval✓✓✓

Testing-coverage baseline✓✓✓

Introduced at Production

Reporting by scenario—✓✓

Approval workflow in your systems—✓✓

Approved write-back—✓✓

Monitoring-platform integration—✓✓

Introduced at Advanced

Multi-platform rule sets——✓

Multi-stage model-risk approvals——✓

High alert volume——✓

Multi-typology tuning controls——✓

Build price From $5,000 From $8,000 Custom quote

Final build priceConfirmed after discovery based on integrations, workflow complexity, transaction volume, approval controls and deployment requirements.

Separate from buildBuild pricing is separate from recurring Agent Care, which covers managed monitoring, evaluations, incidents and verified improvements after launch.

What we need from you

What you bring, and what we build with it

Each input maps to a piece of build scope and a week in the delivery timeline.

You bringWe build with it

01Your scenario inventory and segment definitions → Population ingestion and evidence mappingWeek 1

02Representative tuning studies and validations → Testing baseline, sampling design and evidence bindingWeek 2

03Your tuning, sampling and approval policy → Tuning-policy mapping and automation-boundary definitionWeek 1

04Access to relevant APIs, feeds or exports → Monitoring and payment assessment, then integration setupWeek 2

05Thresholds you would not want defended → Below-the-line cases and failure-mode testingWeek 4

06What no tuning change may skip → Confidence scoring, exception routing, guardrails and approval controlsWeek 3

07Named owners to approve threshold changes → Owner approval workflow, then pilot and production validationWeeks 5–6

Nothing else is required Deployment, documentation and Agent Care handover are ours.

Delivery timeline

Four phases across six weeks

Each phase covers the weeks it truly occupies, which is why week 5 runs two of them side by side.

Phase W1W2W3W4W5W6

Discovery W1

Build W2 – W3

Evaluate W4 – W5

Pilot & Launch W5 – W6

Week focus W1Tuning workflow discovery, policy mapping and the automation boundary W2Monitoring-system integration and the testing baseline W3Testing workflow, confidence logic and approval controls W4Evaluation suite, guardrails and failure-mode testing W5Platform integration, pilot scenarios and targeted corrections W6One tuning round run under the monitoring owner, then Agent Care handover

Reading the bandEach bar spans only the weeks its work is named in. The week 5 overlap is two phases running, not padding.

At the end of W6Validation closes on a live round, and Agent Care takes over monitoring.

DurationSix-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.

Next step · Banking AI agent

Build a tuning agent around your bank's approval chain.

Show us your scenario inventory, your change record and who approves a change. Not a statutory clock. A signed study, a named approver, and the evidence of what they saw.

Discuss this agent →

Nestack Agents · Monitoring tuning & documentationAGT-BK-17 · Agent Care available after launch

Transaction-Monitoring Tuning & Model-Documentation AI Agent