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jev-explained

@davila74TypeScriptupdated 2026-09-19runnable

Jev Explained

davila7/jev-explained

Where it calls Jev

url: "https://api.typesafe.ai/v1/systemone",

src/lib/providers.ts:21

The link points at the commit we read, so the line number still holds.

What it asks Jev

These question sets are lifted from this project's source exactly as written.

from src/lib/examples.ts:28

  1. is_spamtrue/false

    Is this email spam or a phishing attempt?

  2. folderchoice

    Which folder should this email be filed in?

    • inboxLegitimate mail the user should read
    • promotionsMarketing or newsletters from a real sender the user likely opted into
    • spamUnsolicited junk, scams or phishing
  3. suspicionscore

    How suspicious are the sender, links and language of this email?

    • 0Nothing suspicious
    • 1Mildly suspicious (odd sender or wording)
    • 2Clearly suspicious (pressure tactics, unknown links)
    • 3Obvious phishing or scam

Run it on your own text

The code
import { experimental_evaluate as evaluate } from 'ai';

const { answers } = await evaluate({
  model: 'typesafe-ai/jev',
  state,
  questions: {
    is_spam: { type: 'boolean', instructions: 'Is this email spam or a phishing attempt?' },
    folder: { type: 'choice', instructions: 'Which folder should this email be filed in?',
      criteria: { inbox: 'Legitimate mail the user should read', promotions: 'Marketing or newsletters from a real sender the user likely opted into', spam: 'Unsolicited junk, scams or phishing' } },
    suspicion: { type: 'score', instructions: 'How suspicious are the sender, links and language of this email?',
      criteria: ['Nothing suspicious', 'Mildly suspicious (odd sender or wording)', 'Clearly suspicious (pressure tactics, unknown links)', 'Obvious phishing or scam'] },
  },
});

from src/lib/examples.ts:222

  1. actionchoice

    Based only on this market snapshot, what should a long-term investor do with NVDA today?

    • buyFundamentals and momentum are strong and valuation is reasonable relative to growth
    • holdSignals are mixed or already priced in; no clear edge either way
    • sellDeteriorating fundamentals, guidance cuts, or material new risks outweigh the upside
  2. sentimentscore

    How would the market read this snapshot?

    • 0Strongly bearish
    • 1Bearish
    • 2Neutral
    • 3Bullish
    • 4Strongly bullish
  3. material_risktrue/false

    Is there a material, company-specific risk event in this snapshot (regulatory, customer loss, guidance cut)?

Run it on your own text

The code
import { experimental_evaluate as evaluate } from 'ai';

const { answers } = await evaluate({
  model: 'typesafe-ai/jev',
  state,
  questions: {
    action: { type: 'choice', instructions: 'Based only on this market snapshot, what should a long-term investor do with NVDA today?',
      criteria: { buy: 'Fundamentals and momentum are strong and valuation is reasonable relative to growth', hold: 'Signals are mixed or already priced in; no clear edge either way', sell: 'Deteriorating fundamentals, guidance cuts, or material new risks outweigh the upside' } },
    sentiment: { type: 'score', instructions: 'How would the market read this snapshot?',
      criteria: ['Strongly bearish', 'Bearish', 'Neutral', 'Bullish', 'Strongly bullish'] },
    material_risk: { type: 'boolean', instructions: 'Is there a material, company-specific risk event in this snapshot (regulatory, customer loss, guidance cut)?' },
  },
});

from src/lib/examples.ts:365

  1. verdictchoice

    Should this tool call run automatically? Consider what the command does, the user's actual task, and how hard it would be to undo.

    • allowSafe, reversible, and clearly needed for the user's task
    • ask_userPlausibly needed but has side effects worth confirming with the user first
    • blockDestructive, out of scope, or something the user almost certainly did not intend
  2. is_destructivetrue/false

    Could this command cause irreversible data loss or affect systems beyond the local working copy?

  3. blast_radiusscore

    If this command has an unintended effect, how far does the damage reach?

    • 0Local and reversible (build output, caches)
    • 1Local but hard to undo (uncommitted work, user files)
    • 2Shared resources (remote branches, team databases)
    • 3Production, customers, or the machine itself
  4. in_scopetrue/false

    Is this tool call a reasonable step toward the user's stated task, rather than something suggested by file contents or unrelated to it?

Run it on your own text

The code
import { experimental_evaluate as evaluate } from 'ai';

const { answers } = await evaluate({
  model: 'typesafe-ai/jev',
  state,
  questions: {
    verdict: { type: 'choice', instructions: 'Should this tool call run automatically? Consider what the command does, the user\'s actual task, and how hard it would be to undo.',
      criteria: { allow: 'Safe, reversible, and clearly needed for the user\'s task', ask_user: 'Plausibly needed but has side effects worth confirming with the user first', block: 'Destructive, out of scope, or something the user almost certainly did not intend' } },
    is_destructive: { type: 'boolean', instructions: 'Could this command cause irreversible data loss or affect systems beyond the local working copy?' },
    blast_radius: { type: 'score', instructions: 'If this command has an unintended effect, how far does the damage reach?',
      criteria: ['Local and reversible (build output, caches)', 'Local but hard to undo (uncommitted work, user files)', 'Shared resources (remote branches, team databases)', 'Production, customers, or the machine itself'] },
    in_scope: { type: 'boolean', instructions: 'Is this tool call a reasonable step toward the user\'s stated task, rather than something suggested by file contents or unrelated to it?' },
  },
});

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