Nestack Agent Care
Industries / Automotive / Used-EV appraisal & listing

Automotive AI agent · Appraisal & listing

Used-EV Appraisal & Listing AI Agent

Assemble the condition, battery-health, warranty and recall evidence on a used EV and draft the listing — with the value, the range claim and the decision to publish left to a named person.

4–6 weeksTypical delivery
Your DMSDeployment
Your managerValuation
Agent CareAfter launch

What this agent does

Assembles the evidence, not the number

In
01

Take the unit in from a trade-in, a lease return, an auction buy or a car already standing in inventory.

02

Pull the service records, prior damage, title brands and the battery and drivetrain warranty as recorded.

Reason
03

Record every battery state-of-health reading on file with where it came from, when, and on what tool.

04

Run the VIN through the recall and campaign lookups your store uses and note what each returned, and when.

05

Set out charging capability, connector and conditioning as the build record states them for this VIN.

Decide
06

Hold back any value, offer, range figure or claim that the battery or the coverage is sound.

07

Flag thin, stale or disagreeing evidence and say what the appraiser should verify before it is listed.

Out
08

Hand over an appraisal file and a draft listing carrying the disclosures the store requires.

09

Retain every reading, its source and date, what the manager changed, what was published and by whom.

Product statement

The agent gathers, dates and drafts. The value, the condition claim and the decision to publish stay with a named person at the dealership.

Example workflow

One unit, end to end

AgentHuman
1Unit taken inTrade-in at the desk, lease return, auction buy or a car already standing in inventory
2VIN decoded and matchedResolved to one VIN and one build record before any history or reading is read
3Evidence gatheredService records, prior damage, title brands, warranty terms and the recall and campaign lookups
4Battery evidence datedEach state-of-health reading with its source, its tool and the conditions it was taken under
No human action required

Stages 1 to 4 run without a person in the loop — the decode, the retrieval and the battery evidence are finished before a manager opens the file, and nothing has been listed yet.

5DecisionSplits on how the evidence stands, and on what a listing would have to assert
Evidence agrees and is dated

Reaches the used-car manager ready to read.

Readings disagree or a claim is needed

Held for the used-car manager to resolve.

Used-car manager

Reads the file, the readings behind it and what the agent refused to state, sets the number themselves, then publishes under the store's name.

Approve file · Correct · Order inspection
Approved — handed back
6File saved against the stock numberHeld unpublished on the stock record; nothing reaches a marketplace at this stage
7Outcome evaluatedWhat the manager corrected, what was published, and disclosure and evidence misses by cohort
Corrections

Every claim the manager adds back, or strikes out, is counted in the evaluation.

What should not run autonomously

Human approval stays in control

Outside the boundary — human approval required8 items
Stating a value, an offer or a trade figure.
Pricing a unit or setting a listing price.
Calling a battery healthy, degraded or sound.
Stating a range the vehicle will achieve.
Automation boundaryAgent acts unaided
Decode the VIN and match one build record.
Gather service records, damage, title brands and warranty terms.
Record each battery reading with its source, tool and date.
Assemble the appraisal file and draft the listing copy, unpublished.
The appraisal file is written to the stock record, never to a marketplace. A named person sets the value and publishes.
Confirming coverage, or that a warranty transfers.
Saying a unit has no open recall.
Deciding the as-is or warranty disclosure.
Publishing a listing to any marketplace.

Example output

One appraisal file, annotated

Everything the agent puts up is attached to the reading and the record it was taken from.

Appraisal output · one used EVIllustrative example
Unit
Battery reading
Matched to
File status
Confidence
Battery condition
Trade-in EV, one prior owner
Dash estimate, cold morning
One VIN, one build
Unpublished — manager to value
88%
Not stated by the agent
As receivedThe unit as it arrived and the reading as it was taken, with its conditions beside it — nothing here is adjusted.
Evidence used VIN and build match Battery reading, dated Recall lookup, timestamped
Why no health claimA dash estimate off a cold pack is not a diagnostic result. The claim is the manager's.
ActionApprove fileCorrectOrder inspection
What the score decidesConfidence decides how much the manager verifies, not what the listing is allowed to claim.

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 unit taken inTrade-in, lease return, auction or lot stock
03Evidence & draft

Date every reading to its source

Use the build record, the service and damage history, the warranty terms and the readings as they were actually taken.

01Approved path

The evidence arrives assembled

Battery readings, warranty terms, recall lookups and damage history land in one dated file instead of across four systems.

02Human review

Hold the listing where a claim starts

Copy that would have to state a value, a range or a sound battery waits for the manager who answers for the advert.

04Build an evidence trail

Retain every reading, its source and date, the recall lookup, the draft, the manager's correction and what was published — on both paths.

Integrations

Typical integrations

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

DMS & inventoryCDK Global · Tekion
vAuto · Stock and appraisal records
Listing & syndicationDealer website · marketplace feeds
HomeNet · OEM certified programme
History, title & recallsCarfax · AutoCheck
NHTSA VIN lookup · OEM campaign portal

Agent

Used-EV appraisal & listing

Decodes the build
Dates the evidence
States no value

Battery & warrantyOEM diagnostic reports · scan tools
Telematics readings · warranty terms
Observability & evaluationOpenTelemetry · Langfuse
Supported monitoring/evaluation sources

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

Agent controls

Six layers around what the file may claim

Each control wraps the one inside it. The six wrap the file; the number the manager writes and the moment it is published are outside them.

L6 · Outermost — last line of defenceInward → L1 · closest to the model
L6Rollback / safe modeReturn appraisal and listing work to staff if evaluations or production signals degrade.Roll back
L5TraceabilityRecord the sources read, the readings, the draft, the correction and what was published.Record
L4Human publishA listing is published by the used-car manager who set the value on it.Gate
L3Disclosure checkThe draft is held against the disclosures your store requires for this unit.Check
L2Evidence provenanceNo reading is carried without its source, its tool, its date and its conditions.Attribute
L1Claim withholdingThe value, the range figure and the battery claim are the manager's to write.Withhold
Model coreAppraisal file assembled — the dated evidence, the warranty read and the draft listing copy
L1 – L2Decide what the file is allowed to assert
L3Decides what the listing has to carry
L4 – L5Keep the publish with a person and the trail intact
L6Pulls automation back when signals degrade

How Nestack evaluates it

Evaluate the whole file — not only the listing copy at the end.

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

Surface — the appraisal file the manager opens
Depth of coverage ▼
E1Final-output evaluationWas the drafted listing true to the evidence behind it?
E2Step-level evaluationDid it decode the build and read the right history and warranty terms?
E3Tool evaluationDid it query the correct VIN in the recall, history and diagnostic sources?
E4Claim-withholding recallDid a value, a range or a battery-condition claim survive into a draft?
E5Slice evaluationHow does file quality change across vehicle and evidence cohorts?
E6Business outcomeHow much did the manager correct, and what was published wrong anyway?
Floor — the listing a buyer finally reads

Failure modes

Where each failure originates in the agent

Seven failure modes plotted against the five stages of the agent lifecycle.

Agent lifecycleDirection of processing →
01 · Decode / retrieval2 modes
UE-01

Recall lookup gone stale

A campaign was posted after the VIN was last checked.

UE-02

Original-owner term carried over

The second owner's shorter coverage is the one that applies.

Stage resolvesThe VIN, the build record, the history and the warranty terms
02 · Battery evidence2 modes
UE-03

Dash estimate read as a test

A cold-pack number is carried as a measured capacity.

UE-04

Reading taken on a warm pack

Captured straight off a fast charge, unrested and unrepeatable.

Stage recordsEach reading, its source, its tool and its conditions
03 · Drafting1 mode
UE-05

Range implied by the copy

A draft turns a capacity figure into what the car will do.

Stage draftsThe listing copy, the disclosures and the blanks left
04 · Handoff / publish1 mode
UE-06

Disclosure dropped in the feed

Syndication truncates the line the store requires.

Stage presentsThe file a manager values and the listing they publish
05 · Change / Version1 mode
UE-07

Template revision not re-checked

A wording change quietly weakens what a listing must carry.

Stage tracksModel, prompt, disclosure and marketplace rules
Sev-1 · a claim reaches a buyer Sev-2 · the file misstates the vehicle Sev-3 · evidence thins, more is verified

Affected slices

A reading is not the same as a test

A number read off the dash, a pack replaced under a campaign and an auction unit with no service file are where the manager sends the evidence back before anything is listed. File quality is reported by cohort, not only in total.

Slice performance — reported separately, not only in aggregateIllustrative example
SliceFailure rateLift Lift vs. thresholdStatus
Dash-only battery readings5.6%2.8× Review
Recall-replaced battery packs4.4%2.2× Review
Auction units, thin history3.6%1.8× Watch
Recent same-model trade-ins1.4%0.7× Normal
Bar: manager-correction rate lift vs. same-model trade-in baseline · scale 0–4.0× · tick at 2.0× 2 of 4 slices over threshold

Evidence-linked improvement

A reading without a source is not evidence

A manager sending the file back is not one bad appraisal. It changes the provenance rule, the disclosure list or the source the agent is allowed to read.

Improvement cycle · five stagesSwitchback — the path turns at Improve and returns at Learn
01Detect

Manager corrections, disclosure misses or disputed readings rise in a cohort.

02Diagnose

Narrowed to the build decode, the source read, the age of the reading, the warranty term or the draft.

03Improve

The provenance rule or the disclosure list changes under your used-car manager's sign-off, version-linked.

04Verify

Re-run on stored units from that cohort, including the ones that were listed and pulled.

05Learn

The pulled listing is kept as a test case, and the claim it carried enters your store's advertising notes.

Learn → DetectThe return edge. The next unit is drafted against one more claim this store has already had to take back.

Typical build scope

Twelve workstreams across six weeks

The build scope read against the delivery timeline. Week structure follows the six-week plan — discovery, decode and retrieval, battery evidence, evaluation, integration, then production validation and handover.

Workstream Week 1Week 2Week 3Week 4Week 5Week 6
01Workflow discovery and automation-boundary definition.
02DMS, inventory and listing-feed access assessment.
03Disclosure rules and unstated claims.
04VIN decode and build-record matching.
05History, title-brand and recall retrieval.
06Battery-evidence and provenance rules.
07Warranty term, transfer and coverage read.
08Appraisal file assembly and listing drafting.
09Claim-withholding and disclosure testing.
10Cohort slice testing across evidence sources.
11Stock-record write-back and manager handoff.
12Observability, deployment 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 rooftop, one source ProductionLive inventory and feeds AdvancedWhole group inventory
Introduced at Pilot
Appraisal file with dated, sourced readings
Withheld value, range and battery claims
A named person values and publishes
Store disclosure and wording templates
History, title-brand and recall retrieval
Baseline evaluation
Introduced at Production
Stock-record write-back and manager handoff
Drafts shaped for your syndication feeds
Observability and evaluation
Introduced at Advanced
Additional battery-diagnostic sources
Group inventory and rooftop controls
Build price From $5,000 From $8,000 Custom quote
Final build priceConfirmed after discovery based on rooftops, DMS and inventory integrations, battery-evidence sources, listing feeds, disclosure approvals 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 approved disclosures and what a listing may never claim Disclosure rules and unstated claimsWeek 1
02Read access to the DMS, the inventory tool and your listing feeds DMS, inventory and listing-feed access assessmentWeek 2
03The battery-evidence sources you trust, and who actually takes them Battery-evidence and provenance rulesWeek 3
04How warranty terms and transfers are recorded for your franchises Warranty term, transfer and coverage readWeek 3
05Listings that had to be corrected or pulled, and what they claimed Evaluation suite, regression cases and failure-mode testingWeek 4
06The model mix you actually take in, thin-history units included Cohort slice testing across evidence sourcesWeek 5
07A named used-car manager to value the unit and publish it Manager handoff, then supervised valuation and publishingWeeks 5–6
Nothing else is required Deployment, documentation and Agent Care handover are ours.

Delivery timeline

Four phases across six weeks

Phases are drawn over the weeks they actually occupy. Week 5 is where the cohort testing ends and the first units are listed.

Phase W1W2W3W4W5W6
Discovery W1
Build W2 – W3
Evaluate W4 – W5
Pilot & Launch W5 – W6
Week focus W1Withheld claims, store disclosures and the automation boundary W2DMS and inventory access, VIN decode and build-record matching W3History, recall and warranty retrieval, and battery-evidence provenance W4Disclosure checks, claim-withholding tests and the evaluation suite W5Cohort testing, stock-record write-back, then the first units listed W6Managers value and publish from live files, then Agent Care starts
Reading the bandProvenance rules are fixed in week 3, so nothing reaches evaluation carrying an undated reading.
At the end of W6Managers have valued and published from live files, with every claim traceable to the reading and the date behind it.
DurationSix-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.

Next step · Automotive AI agent

Build a listing agent around the evidence you can stand behind.

Show us a month of used EVs you took in — the battery readings you had, the warranty terms you quoted and the listings that had to be corrected. We'll rebuild those files from the same evidence and show you which readings could never have carried the claim the listing made.

Nestack Agents · Used-EV appraisal & listingAGT-AUT-08 · Agent Care available after launch