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Quality AI agent · Requirements trace

Requirements Trace AI Agent

Draw the candidate links, keep the evidence and the doubt beside each one, and hand the matrix — not a coverage claim — to the reviewer whose name goes on the submission.

4–6 weeksTypical delivery
Your stackDeployment
Links firstNamed reviewer
Agent CareAfter launch

What this agent does

Proposes the link, never certifies it

In
01

A link is proposed, and the signal that suggested it is recorded beside the link itself.

02

A link is not a proof: the matrix records a relation, never the argument that it holds.

Reason
03

Best published trace recovery holds up two links in five, on a set of twenty-two requirements.

04

A review of seventy-nine studies found no compelling evidence that recovered links are useful.

05

Design control runs 820.10(c) to ISO 13485 clause 7.3; 820.30 was reserved on 2 February 2026.

Decide
06

Traceability sits at clause 7.3.2, and the design history file is now clause 7.3.10.

07

Under 807.87(l) a responsible person of the firm, not a consultant, signs within fifteen days.

Out
08

No rule found requires the matrix as a document, and that absence is recorded, not filled.

09

Execute write actions only inside the approval boundaries agreed during implementation.

Product statement

Drafting, linking and holding belong to the agent. Coverage belongs to a named reviewer, who accepts the link and answers for the file at inspection.

Example workflow

One link, proposal to acceptance

AgentHuman
1Requirement set extractedDesign inputs, software requirements, hazards, test cases and the change history behind them
2Baseline fixed and datedThe requirement identifiers, their versions, the artefacts in scope and the day the baseline was taken
3Candidate links proposedThe requirement, the artefact that may cover it, the signal that suggested the link and the confidence
4Controls appliedBaseline checks, direction checks, orphan checks and link confidence
No human action required

Stages 1 to 4 run unaided, and no requirement is called covered at any of them — the agent is proposing, and the reviewer lane opens at the acceptance gate.

5DecisionSplits at the acceptance gate
A link with cited evidence

Goes to the named reviewer to accept.

Anything safety-bearing

Adds a design-assurance read first.

Design-assurance review

The link is held with its evidence, its direction and the requirement the agent could not place.

Accept · Reject link · Send to design-assurance review
Accepted — by the named reviewer
6Design file and matrix records updatedOnly where write access and records policy allow it
7Outcome evaluatedAcceptance outcomes, orphan age, reviewer rejections and what a CP 7382.850 sample asked to see
Corrections

Each link the reviewer rejects counts in the evaluation.

What should not run autonomously

Human approval stays in control

Outside the boundary — human approval required8 items
Concluding that a requirement is covered.
Signing the truthful and accurate statement.
Closing an orphan requirement.
Accepting a link into the design file.
Automation boundaryAgent acts unaided
Propose a candidate link and cite its evidence.
Record each candidate link with the traceability signal under it.
Hold each unplaced requirement for a named reviewer.
Flag each requirement the latest change left without verification.
No requirement is called covered except by a named reviewer, inside the agreed boundaries.
Judging whether a test verifies a requirement.
Telling a notified body the file is complete.
Choosing which artefacts a baseline covers.
Changes to the linking rules or the review gate.

Example output

One proposed link, annotated

This serves the design-assurance lead who must show an unbroken chain years after transfer, and Koven Technologies drew one of the first warning letters written in the post-QMSR style; below is one proposed link exactly as the agent leaves it.

Proposed link · single requirementIllustrative example
Link
Recorded as
Direction
Evidence of record
Confidence
Held for
Design input to system test
Proposed, not accepted
Both directions
Design file, 14 August 2026
Held unaccepted
The named reviewer, by name
As receivedDrawn from the requirement text, the test record and the change history, and it shows resemblance only.
What the record holds Requirement text Test record Change history
Why no coverage hereCalling a requirement covered is a judgement a named reviewer makes.
ActionAccept linkReject linkSend to design-assurance review
What the score decidesBelow the configured threshold a link gets a design-assurance read before the reviewer.

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
Each proposed linkFrom the requirement it claims to cover
03Link signal

Where the link is read

MDR Article 15(3)(b) makes the technical documentation a named person's continuing duty, and FAA Order 8110.49A walks an inspector from system requirement to test result.

01Approved path

A link is not a proof

An agent can assert that a test covers a requirement; it cannot know whether the test exercises the conditions that requirement sets, and NPR 7150.2D asks for the chain in both directions.

02Human review

What was checked, and not found

No rule located requires a traceability matrix as a document; FDA asks for the property, not the spreadsheet. Its design-control guidance of March 1997 is still listed Final while construing a section reserved on 2 February 2026, the same day QSIT was withdrawn.

04Build an evidence trail

The requirement, the test that claims it and the reviewer who accepted the link stay together.

Integrations

Typical integrations

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

Requirements and design inputsALM suites · requirement stores
Requirement text and versions
Tests and verification recordsTest management · CI results
Test cases and their results
Risk and hazard filesRisk register · hazard assessments
Hazards and risk control measures

Agent

Requirements tracing and review

Reads the requirements
Proposes the links
Holds the matrix

Design and change recordsChange control · design file feeds
Change orders and design outputs
Observability & evaluationOpenTelemetry · Langfuse
Supported monitoring/evaluation sources

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

Agent controls

Six meshes between the link and the file

Six meshes stacked in one frame, the last the closest. What holds is drawn in the map below.

L6 · Outermost — last line of defenceInward → L1 · closest to the model
L6Rollback / safe modeNarrow the agent to requirement listing when evaluation or production signals degrade.Roll back
L5Version monitoringTrack model, prompt and linking rules, and note the version each link was proposed under.Track
L4TraceabilityRecord each link, the signal under it, the baseline it came from and each read of the file.Record
L3Reviewer releaseHold the link for a named reviewer; the hold governs acceptance, not whether the link is true.Gate
L2Baseline guardrailsTest each link against its dated baseline, and refuse one drawn from a superseded requirement.Restrict
L1Confidence thresholdsRoute a safety-bearing or thinly evidenced link to a design-assurance read before the reviewer sees it.Require review
Model coreLink proposed — the requirement, the artefact, the signal, the direction and what stays unplaced
L1 – L2Test whether a link may be accepted
L3Leaves the acceptance to a named reviewer
L4 – L5Keep the link and the requirement behind it
L6Marks the link unverified when signals degrade

How Nestack evaluates it

Evaluate the whole tracing run — not only the matrix that comes out.

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

Surface — the matrix an inspector opens
Depth of coverage ▼
E1Final-output evaluationDid the link stay inside what its cited evidence actually shows?
E2Step-level evaluationDid the agent read the right baseline, the right artefacts and the live linking rules?
E3Tool evaluationDid it read the correct requirement and write the correct link record?
E4Confidence calibrationDo low-confidence links actually attract more reviewer rejections?
E5Slice evaluationHow does performance change across requirement classes and link directions?
E6Business outcomeHow many links needed a second read before the reviewer accepted one?
Floor — the file read back under CP 7382.850

Failure modes

Where each failure originates in the agent

Seven failure modes, each placed where the break first becomes visible.

Agent lifecycleDirection of processing →
01 · Retrieval1 mode
VH-03

Live view read as the record

The tool is read, not the controlled file.

Stage gathersThe inputs, the tests, the code and the hazards
02 · Reasoning2 modes
VH-04

Link asserted on wording alone

Resemblance is filed as coverage.

VH-06

Orphan closed by nearest match

A real gap disappears into a link.

Stage proposesThe link, the signal, the direction and the doubt
03 · Tool / write2 modes
VH-02

Reverse direction never drawn

Forward links read green; nothing checks back.

VH-05

Derived requirement given a parent

The escalation that was owed never happens.

Stage writesOnly where write access and approval policy allow it
04 · Output1 mode
VH-01

Signed over links nobody read

A name goes under a file too large to read.

Stage returnsThe matrix a reviewer opens and then signs
05 · Change / Version1 mode
VH-07

A change leaves the links behind

The wording moves; the links stay valid and dead.

Stage tracksModel, prompt, link rules and design changes
Sev-1 · a link certified but never read Sev-2 · an orphan closed by resemblance Sev-3 · link unverified, matrix held back

Affected slices

Changed requirements absorb the rejections

A programme coverage figure can read clean while requirements that changed late carry most of the reviewer rejections. Nestack reports the rejection rate by requirement class, not only in total.

Slice performance — reported separately, not only in aggregateIllustrative example
SliceFailure rateLift Lift vs. thresholdStatus
Changed safety requirements10.4%3.7× Review
Clinically worded requirements7.4%2.6× Review
Derived low-level requirements4.6%1.6× Watch
Stable functional requirements2.1%0.7× Normal
Bar: rejection-rate lift vs. stable-requirement baseline · scale 0–4.0× · tick marks the 2.0× review threshold 2 of 4 slices over threshold

Evidence-linked improvement

What a broken link costs

A loop closes when the requirement covered on paper alone is a standing case. That suite is what the next matrix drawn is measured against.

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

Rejection rate rises on requirements that changed late.

02Diagnose

The indications quietly widened to take in a fetal application, cited at Koven Technologies in warning letter 734643 under clause 7.3.9, are worked backwards until one cause is left standing.

03Improve

Number the matrix; the links that fill it are filed beneath it.

04Verify

A single orphan requirement case stops the whole matrix issuing.

05Learn

One case joins the suite, and one line joins the linking rules.

Learn → DetectThe return edge. The next matrix is drawn 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, linking logic, evaluation, integration, then production validation and handover.

Workstream Week 1Week 2Week 3Week 4Week 5Week 6
01Trace scope and the automation-boundary definition.
02Requirement, test and risk sources.
03Requirement-to-test and reverse-direction coverage.
04Requirement extraction.
05Baseline and artefact binding.
06Link confidence and review routing.
07Reviewer acceptance workflow.
08Design-file integration.
09Coverage and orphan cases.
10Guardrails and linking controls.
11Link-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 requirement set, one cycle ProductionProduction review workflow AdvancedMultiple programmes / standards
Introduced at Pilot
Linking to your requirement classes
Named reviewer acceptance
Requirement-inventory baseline
Introduced at Production
Reporting by requirement class
Reviewer review workflow in your systems
Approved design-file write-back
Toolchain-and-repository integration
Introduced at Advanced
Multi-standard linking rules
Cross-programme trace packs
Large requirement sets
Multi-standard coverage controls
Build price From $5,000 From $8,000 Custom quote
Final build priceConfirmed after discovery based on integrations, workflow complexity, requirement volume, acceptance 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 live requirement sets and the standard each is held to Baseline capture and link versioningWeek 1
02Representative requirements, tests and past review decisions Artefact binding, linking logic and the requirement-inventory baselineWeek 2
03Your review path and the design-assurance lead it names Baseline mapping, artefact binding and the automation boundaryWeek 1
04Access to relevant APIs, feeds or exports Requirement, test and risk source assessment, then integration setupWeek 2
05Matrices you would not want inspected Coverage cases and the failure roundWeek 4
06What no link may demonstrate Link confidence, review routing, guardrails and release controlsWeek 3
07A named reviewer who accepts the link Handover to the named reviewer, 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

These bands are counted and not evened out; the fifth week holds two because the two genuinely overlap.

Phase W1W2W3W4W5W6
Discovery W1
Build W2 – W3
Evaluate W4 – W5
Pilot & Launch W5 – W6
Week focus W1Baseline discovery, link versioning and the automation boundary W2Requirement, test and risk integration and the inventory baseline W3Artefact binding, linking logic and release controls W4Evaluation suite, coverage cases and failure-mode testing W5Design-file integration, pilot matrices and targeted corrections W6One design cycle run under the design-assurance lead, then Agent Care handover
Reading the bandEach bar covers the weeks its own work is named for, and week five carries the overlap.
At the end of W6Once the link record validates, Agent Care adopts the agent.
DurationSix-week plan shown · typical delivery 4–6 weeks depending on scope confirmed in discovery.

Next step · Quality AI agent

Build a requirements trace agent around the link your last submission never proved.

Show us one requirement and the test your matrix says covers it. Not how fast the links were drawn. Which baseline they were drawn against, what the link establishes and what it does not, and whose name goes under the submission. A link nobody proved comes back as a finding.

Nestack Agents · Requirements traceAGT-QA-03 · Agent Care available after launch