{"files":{"main.ts":"import {run} from './core.ts';\nimport {POLICY} from './policy.ts';\nexport function evaluate(payload: any): any { return run(payload, POLICY); }\n","core.ts":"import {addDecimal, parseDecimal, formatDecimal, compareKeys} from './helpers.ts';\n\nexport function run(payload: any, policy: any): any {\n  const duplicates: any[] = [];\n  const globalSeen = new Set<any>();\n  const tenantSeen = new Map<any, Set<any>>();\n  const groupsByTenant = new Map<any, Map<any, any>>();\n  const groups: any[] = [];\n\n  for (let index = 0; index < payload.events.length; index++) {\n    const event = payload.events[index];\n    const age = payload.now - event.ts;\n    if (age > policy.max_age || (age === policy.max_age && !policy.inclusive_age)) continue;\n\n    let seen = globalSeen;\n    if (policy.scope_key === 'tenant') {\n      let scoped = tenantSeen.get(event.tenant);\n      if (!scoped) {\n        scoped = new Set<any>();\n        tenantSeen.set(event.tenant, scoped);\n      }\n      seen = scoped;\n    }\n    if (seen.has(event.id)) {\n      if (policy.audit_duplicate) duplicates.push(event.id);\n      continue;\n    }\n    seen.add(event.id);\n\n    let tenantGroups = groupsByTenant.get(event.tenant);\n    if (!tenantGroups) {\n      tenantGroups = new Map<any, any>();\n      groupsByTenant.set(event.tenant, tenantGroups);\n    }\n    let group = tenantGroups.get(event.entity);\n    if (!group) {\n      group = {tenant: event.tenant, entity: event.entity, index, events: []};\n      tenantGroups.set(event.entity, group);\n      groups.push(group);\n    }\n    group.events.push(event);\n  }\n\n  const sortField = policy.latest_by === 'ts' ? 'ts' : 'seq';\n  const results = groups.map(group => {\n    const winners = new Map<any, any>();\n    for (const event of group.events) {\n      const key = event[sortField];\n      if (!winners.has(key) || policy.tie_policy === 'last') winners.set(key, event);\n    }\n    const retained = Array.from(winners.values());\n    retained.sort((a, b) => compareKeys(a[sortField], b[sortField]));\n\n    let seq = 0;\n    let value = parseDecimal('0');\n    let deleted = false;\n    for (const event of retained) {\n      if (policy.gap_policy === 'ignore' && event.seq !== seq + 1) continue;\n      seq = event.seq;\n      if (event.kind === 'delete') {\n        deleted = true;\n      } else if (event.kind === 'set' && (!deleted || policy.allow_resurrection)) {\n        const amount = parseDecimal(event.amount);\n        value = policy.amount_mode === 'delta' ? addDecimal(value, amount) : amount;\n        deleted = false;\n      }\n    }\n    if (policy.delete_wins && retained.some(event => event.kind === 'delete')) deleted = true;\n\n    return {\n      index: group.index,\n      output: {\n        tenant: group.tenant,\n        entity: group.entity,\n        value: formatDecimal(value, policy.precision),\n        deleted\n      }\n    };\n  });\n\n  if (policy.order === 'key') {\n    results.sort((a, b) => compareKeys(a.output.tenant, b.output.tenant) || compareKeys(a.output.entity, b.output.entity));\n  } else {\n    results.sort((a, b) => a.index - b.index);\n  }\n  return {entities: results.map(result => result.output), duplicates};\n}\n","policy.ts":"export const POLICY: any = {\n  scope_key: 'tenant',\n  latest_by: 'sequence',\n  tie_policy: 'first',\n  delete_wins: true,\n  allow_resurrection: true,\n  amount_mode: 'absolute',\n  precision: 0,\n  gap_policy: 'accept',\n  audit_duplicate: true,\n  order: 'key',\n  max_age: 60,\n  inclusive_age: true\n};\n","helpers.ts":"export type Decimal = {units: bigint; scale: number};\n\nfunction powerOfTen(exponent: number): bigint {\n  return BigInt(10) ** BigInt(exponent);\n}\n\nexport function parseDecimal(text: string): Decimal {\n  const parts = text.split('.');\n  const fraction = parts[1] || '';\n  return {units: BigInt((parts[0] || '0') + fraction), scale: fraction.length};\n}\n\nexport function addDecimal(a: Decimal, b: Decimal): Decimal {\n  const scale = Math.max(a.scale, b.scale);\n  return {\n    units: a.units * powerOfTen(scale - a.scale) + b.units * powerOfTen(scale - b.scale),\n    scale\n  };\n}\n\nexport function formatDecimal(value: Decimal, precision: number): string {\n  let units = value.units;\n  if (value.scale > precision) {\n    const divisor = powerOfTen(value.scale - precision);\n    const remainder = units % divisor;\n    units = units / divisor;\n    if (remainder * BigInt(2) >= divisor) units += BigInt(1);\n  } else {\n    units *= powerOfTen(precision - value.scale);\n  }\n  const digits = units.toString();\n  if (precision === 0) return digits;\n  const padded = digits.padStart(precision + 1, '0');\n  return padded.slice(0, -precision) + '.' + padded.slice(-precision);\n}\n\nexport function compareKeys(a: any, b: any): number {\n  return a < b ? -1 : a > b ? 1 : 0;\n}\n"}}