4056 stages · jev.page/demo

Typed questions. Math stays in JavaScript.

An index of interactive stages for TypeSafe Jev (System One). Each one is a closed decision — Choice, Score, or Noul — not a chat. Replay first; paste a key if you want a live call. Educational, not the official console.

4056 stages8 groupsjev-1.13.0 replay

Start here

Six stages that show the shape

Support, guardrails, confidence, routing, real-time Choice, a refund gate.

Pulse desk

Support as instrumentation

One ticket. Three typed questions in parallel. Code routes; the desk never reads an essay.

ChoiceScoreNoul

Guard glass

Verify other AI

An LLM wrote the draft. Jev scores the hazards. Your policy decides pass, review, or block.

NoulScore

Threshold plane

Confidence as a second axis

Probability says what. Confidence says whether you should act. Drag the gate; watch tickets reroute.

ChoiceNoul

Switchboard

Intent + model routing

Score how hard the turn is. Choice the handler. One intent can skip the LLM entirely.

ScoreChoiceNoul

Courier frame

Real-time action Choice

Every tick is structured state. Jev picks an allowed move. The board executes. No generated plan.

ChoiceNoul

Refund valve

Policy as a Noul gate

Eligibility is a probability. Abuse is a Score. Code opens the valve only above your line.

NoulScore

Filter the index

4056 stages

37 stages

Product decisions

Tickets, gates, ads, hiring, claims, and other software loops where Choice / Score / Noul replace a chat essay.

01Pulse deskSupport as instrumentationChoiceScoreNoul 02Night houseSpeculative fan-outChoiceNoul 06Threshold planeConfidence as a second axisChoiceNoul 15Refund valvePolicy as a Noul gateNoulScore 19Invoice railWorkflow, not a narrativeChoiceScoreNoul 20Moderation cubeSeverity is a ScoreChoiceScoreNoul 21Dead-air lineHonor opt-out in codeNoul 25FNOL deskFirst notice, not a novelChoiceScore 26Brand gateBefore the ad servesChoiceScoreNoul 27Listing QAClosed category issuesChoiceNoul 28Resume beamRubric, then a humanScoreNoul 29ICP radarQueue the SDR list in codeScoreNoul 32KYC stackRank the alert, do not narrate itScoreNoul 33Contain railRunbooks fire in codeChoiceNoul 34Expense stampPolicy Choice, amounts in codeChoiceNoul 35Churn mercuryA Score, then a CSMScoreNoul 41Quarantine stackCompose Nouls, never one essayNoul 44Demand inkNumbers beside the time seriesScoreNoul 46Landing lockThe ad must match the pageChoiceNoul 47Tilt reportPlayer chat is a closed harm setChoiceScoreNoul 50DSAR stampRights are a closed setChoiceNoul 52Vendor heatNotes → risk ScoresScoreNoul 54Sock reviewAbuse is a class, not a vibeChoiceNoul 55Work rubricCompetencies, then a humanScoreNoul 59Dup deskSame incident, two ticketsScoreNoul 60Prior stampCodes in the table, judgment typedChoiceNoul 69Inbox trayFields, then a mix of questionsChoiceScoreNoul 71PagerPage or ticket, not a novelChoiceNoul 72Blend boardWeights live in codeScoreNoul 78SLA clockIntent typed, hours in DateChoiceNoul 84Role gatePolicy table in the repoChoiceNoul 91Lang railRoute the locale in codeChoiceNoul 99IVR padIntent closed, DTMF is a mapChoiceNoul 109NPS railInstrument typed, bucket is ≤6 / ≤8 / elseChoice 110Allergy lampsDish + Nouls, safety is ANDChoiceNoul 111Eisenhower glassTwo Scores, quadrant in codeScore 125Consent bitsRegion + Nouls, mask is ORChoiceNoul

20 stages

Verify other AI

Guardrails, citations, traces, diffs, and redaction — independent questions over generated text, then policy in code.

03Guard glassVerify other AINoulScore 09Cite checkString match firstChoice 24Compact stripKeep verbatim or dropNoulScore 30Extract cascadeCheap extract, then P(wrong)Noul 31Mid bandRepeat, then map the mushNoul 38Inject filterPassages that instructChoiceNoul 39Trace heatObservability, not a skimScoreNoul 42Claim lampsAtomic claims, not “any problems?”Noul 43Lint railCI is a Noul, not a review essayNoul 48Diff matrixPer-file Scores, then a reviewerScore 49Redact tapeSpans first, then P(PII)Noul 53Reply glassVerify the draft, then sendNoulScore 57Both glassPrompt and reply, one requestNoulScore 58Tool probeThe JSON is a suspectNoulChoice 61Clash wireTwo passages, one NoulNoulChoice 65Context rotFilter, then askNoul 80Log flareSecrets in tracesNoul 85SPDX beamLicenses are a closed setChoiceNoul 86Break lampChangelog is not a vibeNoulChoice 87Parse firstValidity is JSON.parseChoice

16 stages

Agents, tools, and routing

Closed-set actions, skill racks, function args, and fail-open. The harness owns the tools; Jev only chooses.

04Wikirace beamHigh-cardinality ChoiceChoice 08Courier frameReal-time action ChoiceChoiceNoul 10SwitchboardIntent + model routingScoreChoiceNoul 11Call sheetFunction calling without proseChoiceNoul 16Shell classDanger is a closed setChoiceNoul 22Skill rackTwo requests, then maybe noneChoiceNoul 74No hopsName the field in stateNoulChoice 75Unknown hatchNoul cannot abstainChoiceNoul 81Top-p hatchA peaked Choice is not a mush ChoiceChoice 92MIME stampKind closed, size in bytesChoiceNoul 94Fail-openSilence is a pathNoul 95Rate tankAbuse typed, count in the tankNoulChoice 101Flag tickCohort typed, sticky hash in FNVChoice 103Backoff barsFailure class, delay is 2ⁿChoiceNoul 135On-call wheelSeverity typed, human is week % nChoice 144Bind arityVerb typed, ? is countedChoice

21 stages

Rank, find, and extract

Map-reduce over shortlists, taxonomies, spans, and lines. Options are the candidates; JavaScript sorts and stitches.

05Date stitchDecompose, then assembleChoice 07Rerank lanesMap-reduce over a shortlistNoulChoice 12Taxonomy beamYou own the treeChoice 13Merge deskThree levels ARE the outcomesScoreNoul 14Line findChoice can lie by rankingChoiceNoul 17Wrap stitchRecover structure, do not rewriteNoulChoice 18Span pickOptions ARE the candidatesChoice 23Clause lampsAtomic missing piecesNoulChoice 36Relation wireClosed relation setChoiceNoul 37Feature millColumns, not essaysScoreNoul 45Inclusion sieveScreen against YOUR criteriaNoulChoice 51Codebook gridYou own the themesChoiceNoul 56Chunk millMany questions, one reduceNoul 62Action millExistence, not minutesNoulChoice 68Pick, don’t writeCandidates from regexChoice 70Glossary missTerms you ownNoul 76Hit scoresRelevance is a Score, then sortScore 77Alias platesMessy names, closed decisionScoreNoul 79Plain lampCopy against a rubricScoreNoul 132CSV firstRagged rows never reach JevChoice 142Base64 firstValidity is atob, kind is ChoiceChoice

36 stages

Jaggedness: keep math in code

Official weak spots: counting, dates, conversion, identity. Jev types the kind; JavaScript owns the formula.

40Earlier in codeDo not ask Jev who won the calendarChoice 63Twin questionsNoul ≠ ChoiceNoulChoice 64Tally in codeJev does not countChoice 66Not-A sumTwo Nouls are not a partitionNoul 67Window checkParts in Jev, interval in DateChoice 73Boundary tickWrite the exact conditionNoul 82Unit shiftClassify the unit, convert in MathChoice 83Age in JSBirth parts, then subtractChoice 88No double noAsk the direct questionNoul 89FX deskCurrency is Choice, rates are a tableChoice 93FencePlace named, meters computedChoice 96TZ stampZone is Choice, Instant is DateChoice 102Contrast gateRole typed, luminance in MathChoice 105Pitch deskNote is Choice, Hertz is 2ⁿChoice 113Cron nextCadence typed, next fire is DateChoice 115Moon checkCaption Choice, lunation in MathChoice 116ABV mixDrink named, volume-weighted %Choice 119Fib pointsT-shirt Choice, points are a tableChoice 120ISO weekCalendar named, week is Thursday mathChoice 123Click trackGenre Choice, tempo is a tableChoice 124Mired gelIlluminant typed, shift is 1e6/KChoice 127Geohash plateCity typed, hash is bisectionChoice 130Equinox riseCity typed, sunrise is longitudeChoice 133Shannon barClass typed, bits are −p log pChoice 136Macro pourDish typed, kcal is a tableChoice 138Leap yearKind typed, leap is Gregorian mathChoice 143Tip tableService typed, percent is a rowChoice 145Bracket millStatus typed, tax is a tableChoice 146Fare ringsZone typed, fare is a tableChoice 147Hue millMood typed, RGB is a formulaChoice 151ICS spanKind typed, minutes are Date.UTCChoice 159Beaufort stackForce typed, m/s is a tableChoice 209Wind chillForce typed, NWS °F formula in codeChoice 210Heat indexSetting typed, Rothfusz in codeChoice 217Magnus dewPlace typed, 243.12 γ in codeChoice 218HumidexPlace typed, 0.5555×(e−10) in codeChoice

2451 stages

Identifiers, checksums, and plates

IBAN, VIN, national TINs, Luhn, LEI, GTIN — class is Choice; check digits, lengths, and regex live in JavaScript.

1458 stages

Clinical scores and formulas

HEART, PHQ-9, NEWS2, SOFA, BMI — setting or etiology is typed; points, ratios, and SI flags are summed in code.

17 stages

Ops, protocol, and security tables

JWT, CORS, CIDR, TOTP, CVSS, Snowflake IDs. Verb or algorithm is Choice; membership, expiry, and hashes are code.

106JWT tapeAlg typed, exp is Date.nowChoiceNoul 108UUID nibbleEntity Choice, version is a hex digitChoice 112CIDR bitsVerb typed, membership is a shiftChoice 117CORS listVerb typed, host is includes()Choice 118Leaf tapeUsage typed, notAfter is Date.parseChoice 121TTL barDirective typed, age is subtractionChoice 122Budget tankNines typed, remainder is arithmeticChoice 128TOTP windowFactor typed, step is floor(unix/30)Choice 129ULID clockEntity typed, time is CrockfordChoice 131Semver cmpClaim typed, order is tuple compareChoice 137Snowflake shiftEntity typed, time is >> 22Choice 139MAC bitsVendor typed, I/G is bit 0Choice 140Puny labelScript typed, length is 63Choice 141Status classFamily typed, retry is a tableChoice 149HMAC lengthAlg typed, hex is countedChoice 165CVSS 3.1 millVector typed, roundup is codeChoice 193CVE yearSeverity typed, year is parsedChoice

Back to the guide

Stages are educational. Thresholds live in your code. Official docs win on conflict.

Start the 101 Use-case lesson Limits & jaggedness