[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8},"actionData","errors","root",{"_107":108,"_109":110},"routes/embed.x.$handle.$name.$",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":20,"_21":22},"handle","amir5","name","dogsspot_puppy_path","path","SOURCE-BUNDLE.part15.txt","project",{"_23":45,"_11":12,"_34":46,"_47":-5,"_48":42,"_49":50,"_51":50,"_52":53,"_54":-5,"_55":56,"_57":58,"_59":33,"_60":-5,"_61":-5,"_62":63,"_64":65,"_66":67,"_68":69,"_70":71,"_72":-5,"_73":74,"_75":74,"_76":77,"_78":77,"_79":77,"_80":74,"_81":74,"_82":83,"_84":85,"_86":87,"_88":42},"file",{"_23":24,"_11":14,"_25":26,"_27":-5,"_28":29,"_30":31,"_32":33,"_34":35,"_36":37,"_38":17,"_39":40,"_41":42,"_43":-5,"_13":44},"permalink","https://www.val.town/x/amir5/dogsspot_puppy_path/code/SOURCE-BUNDLE.part15.txt","extension","txt","id","0cfc4c3d-d6bb-4e09-928c-6f802a08bf6b","fileId","0192939e-9444-11f1-aac2-1607ee4eb77e","parentId","branchId","551774fb-a850-4c9d-94a1-d3509ddcf1b0","branchVersion",1183,"latest",true,"createdAt",["D",1786982910981],"version",21,"fileType","content","THE DOGS SPOT — SOURCE BUNDLE (part 15 of 47)\n\nEVERY source file in this project, engine/ included. Restoring these parts and nothing else gives\nyou a tree that builds, typechecks and runs its own test suite with no network and no val.\n\nengine/ is here as of 14 Aug 2026. It used to be left out because val 1bfa6e81-74e1-4c6c-ab32-118304a4ffff\nholds it, which was true of every engine file except engine/watch.ts: a module the val does not run,\nso it was never deployed, so it lived in one container and nothing else. A reclaim destroyed it.\nscripts/deploy.mjs --check still compares engine/ against the val file by file; that is a second\ncheck on the same files now, not the only copy of them.\n\nRESTORE (needs only node, from an empty folder). Save each part, then run this ON EACH ONE:\n\n node -e 'const fs=require(\"fs\"),p=require(\"path\");const b=fs.readFileSync(process.argv[1],\"utf8\");\n for(const s of b.split(\"\\n=====FILE \").slice(1)){const i=s.indexOf(\" =====\\n\");\n const f=s.slice(0,i),c=s.slice(i+7);fs.mkdirSync(p.dirname(f),{recursive:true});\n fs.writeFileSync(f,c.replace(/\\n$/,\"\"))}' PART.txt\n\nA record named #1, #2, ... is one FILE cut into pieces: concatenate them in order, then\nstrip one trailing newline from the last. scripts/restore.mjs does this for you.\n\nEach part is complete in itself: whole files only, no reassembly, any order.\n\nThen: node scripts/build.mjs (engine/ came out of these parts; nothing to fetch first)\n node scripts/typecheck.mjs\n node tests/run-all.mjs\n node scripts/deploy.mjs --check (pulls nothing, proves the val matches what you restored)\n node tests/negative-controls.mjs (proves the suite above can actually fail)\n\nIN THIS PART (3 of 129 files)\n engine/watch-view.ts 4366 bytes c48af25fc325\n\n\n\n================================================================================================\n=====FILE engine/watch-view.ts =====\n// READING THE EARLY-WARNING MONITOR. v1.0, 15 Aug 2026.\n//\n// engine/watch-cron.ts runs on an interval and writes one blob. An interval on val.town has no\n// endpoint, so without this file the report would exist and be unreadable — which is a different\n// way of arriving at exactly the state this whole exercise is correcting: something that is built,\n// and running, and nobody can see.\n//\n// TWO SHAPES. `?f=json` for machines and for a future dashboard tile; the default is the plain\n// markdown the report already knows how to write about itself, because the audience for an early\n// warning is a person deciding whether to act on it, not a parser.\n//\n// THE AGE IS THE HEADLINE. A monitor that stopped last Tuesday and a monitor that says \"all clear\"\n// look identical if you only print the findings. So the first thing this route says is how old the\n// report is and whether the last run actually succeeded, ABOVE the findings, every time.\n\nimport { watchReportMarkdown } from \"./watch.ts\";\nimport { WATCH_BLOB, type WatchBlob } from \"./watch-cron.ts\";\n\n/** A run older than this has almost certainly stopped rather than been quiet. The interval is\n * hourly; a day and a half of silence is not a scheduling wobble. */\nconst STALE_HOURS = 36;\n\nasync function sha256Hex(s: string): Promise {\n const b = await crypto.subtle.digest(\"SHA-256\", new TextEncoder().encode(s));\n return [...new Uint8Array(b)].map((x) => x.toString(16).padStart(2, \"0\")).join(\"\");\n}\nasync function authorised(k: string): Promise {\n const configured = Deno.env.get(\"NURTURE_ADMIN_KEY_SHA256\");\n if (!k || !configured || !/^[0-9a-f]{64}$/i.test(configured)) return false;\n const got = await sha256Hex(k);\n const want = configured.toLowerCase();\n if (got.length !== want.length) return false;\n let d = 0;\n for (let i = 0; i < got.length; i++) d |= got.charCodeAt(i) ^ want.charCodeAt(i);\n return d === 0;\n}\n\nexport default async function (req: Request): Promise {\n const u = new URL(req.url);\n if (!(await authorised(u.searchParams.get(\"k\") ?? \"\"))) return new Response(\"Not found\", { status: 404 });\n\n let stored: WatchBlob | null = null;\n try {\n const { blob } = await import(\"https://esm.town/v/std/blob\");\n stored = (await blob.getJSON(WATCH_BLOB).catch(() => null)) as WatchBlob | null;\n } catch { /* fall through to the never-run answer below */ }\n\n if (!stored) {\n const body = { ok: false, state: \"never-run\", what: \"The early-warning monitor has not completed a run yet.\" };\n return u.searchParams.get(\"f\") === \"json\"\n ? Response.json(body, { status: 200 })\n : new Response(`${body.what}\\n`, { headers: { \"Content-Type\": \"text/plain; charset=utf-8\" } });\n }\n\n const ageH = (Date.now() - Date.parse(stored.builtAt)) / 3_600_000;\n const health = {\n reportAgeHours: +ageH.toFixed(1),\n stale: ageH > STALE_HOURS,\n lastRunOk: stored.lastRun?.ok ?? null,\n lastRunAt: stored.lastRun?.at ?? null,\n lastRunError: stored.lastRun?.error || null,\n // Said out loud so nobody has to infer it from an absence. See watch-cron.ts's header.\n coverage:\n \"Runs automatically: the February shape (activity against dollars), the silence check on CRM \" +\n \"payments and new contacts, and the running totals. NOT run automatically: the Square \" +\n \"match-ratio and bridge-journal checks, which need the Square bridge and are still \" +\n \"scripts/watch-run.mjs by hand. Uninspected checks appear in the findings as blind spots.\",\n };\n\n if (u.searchParams.get(\"f\") === \"json\") {\n return Response.json({ ok: true, health, inspected: stored.inspected, report: stored.report, snapshots: stored.snapshots });\n }\n\n const head = [\n `Report built ${stored.builtAt} (${health.reportAgeHours}h ago)${health.stale ? \" ***STALE — THE MONITOR HAS PROBABLY STOPPED***\" : \"\"}`,\n `Last run ${health.lastRunOk ? \"succeeded\" : `FAILED: ${health.lastRunError}`} at ${health.lastRunAt}`,\n `Inspected ${stored.inspected?.transactions ?? 0} payment records across ${stored.inspected?.pages ?? 0} page(s)` +\n (stored.inspected?.truncated ? \" — TRUNCATED, raise PAGE_CAP\" : \"\"),\n health.coverage,\n \"\",\n ].join(\"\\n\");\n\n return new Response(head + watchReportMarkdown(stored.report, \"The Dogs Spot — early warning\"), {\n headers: { \"Content-Type\": \"text/plain; charset=utf-8\" },\n });\n}\n\n\n=====FILE engine/watch.ts#1 =====\n// THE EARLY WARNING MONITOR. v1.0, 12 Aug 2026. Rebuilt 14 Aug 2026 from tests/watch.test.mjs.\n//\n// WHAT THIS IS FOR. On 19 February 2026 this account's CRM stopped recording payment amounts.\n// Bookings carried on arriving at full volume; the dollars written against them went to zero.\n// Nothing failed, so nothing errored, so nothing alerted, and every count on every page stayed\n// healthy. It ran for five months and cost a five-figure sum before a human happened to look.\n//\n// THE RULE THAT FOLLOWS FROM THAT (LESSONS #12): an absence raises no error, so something has to\n// watch the place where a thing used to be. Volume and value are watched TOGETHER, because either\n// one on its own reads as an ordinary business having an ordinary month.\n//\n// FIVE CHECKS, EACH MEASURED AGAINST THE SOURCE'S OWN HISTORY rather than against a number\n// somebody typed:\n// 1. silenceFindings a source that normally produces records has produced none for\n// longer than its own normal quiet spell.\n// 2. matchRatioFindings payments still arriving, the matched share collapsing against its\n// own recent baseline.\n// 3. revenueChannelFindings activity continuing while the money against it goes to zero. This\n// is the February shape, and it is the reason the file exists.\n// 4. bridgeFindings the Square link erroring now, or its journal no longer growing.\n// 5. backwardsFindings a figure that can only ever grow has gone backwards, which usually\n// means a source was swapped, truncated, or read from somewhere else.\n//\n// THREE DESIGN RULES THIS FILE IS BUILT AROUND, each of them paid for:\n//\n// A CHECK THAT INSPECTED ZERO ITEMS RAISES A FINDING ABOUT ITSELF (LESSONS #2). This project has\n// already shipped an audit that scanned zero files and reported all clear. On a monitor that is\n// worse than useless: \"nothing wrong\" and \"nothing looked at\" render identically on the page, and\n// the second one reads as reassurance. So every check returns the size of what it read, every\n// check that read nothing says so in an urgent finding, and blindSpots() is the backstop that\n// refuses to let a silent zero through.\n//\n// A BASELINE BELOW A MINIMUM POPULATION SAYS \"CANNOT JUDGE\" OUT LOUD (LESSONS #13). Replayed\n// against the real history as it stood on 15 March 2026 the revenue check fired and produced\n// \"47 bookings were recorded, which is the same as usual or more, and the money came to $50.00.\n// Over the 6 periods before it the usual figures were 2 bookings and $550.00.\" The arithmetic was\n// right and the sentence was nonsense, because the baseline was this account's first weeks in the\n// CRM. A sentence that reads as a glitch spends the credibility the real alarm will need, so a\n// thin baseline is declared unjudgeable rather than either accusing or passing.\n//\n// EVERY SENTENCE IS GENERATED FROM THE VALUES IT DESCRIBES (engine/facts.ts, header). Nothing in\n// here types a figure alongside the number it is meant to describe. Change an input and the words\n// move with it, or the two can silently disagree, which is how every wrong claim in this project\n// got out.\n//\n// CLIENT COPY RULES, enforced mechanically by copyProblems() over the generated report: no dashes\n// used as punctuation, and never the name of a service this business does not offer.\n//\n// READ ONLY. Nothing in this file fetches, writes, deploys or schedules anything. It is handed\n// data by scripts/watch-run.mjs and hands back a report.\n\n// ---------------------------------------------------------------------------------------------\n// THE SHAPES\n// ---------------------------------------------------------------------------------------------\n\n/** urgent: look today. attention: look this week. note: the monitor talking about itself. */\nexport type Severity = \"urgent\" | \"attention\" | \"note\";\n\nexport type Finding = {\n check: string; // which check raised it, so the report can group them\n severity: Severity;\n sentence: string; // plain words, generated from `numbers`, safe to send\n numbers: Record; // the figures the sentence was built from\n checkFirst: string; // the first thing to open, in her words not mine\n};\n\nexport type CheckResult = {\n check: string;\n title: string; // how the check is named in the report\n inspected: number; // HOW MUCH IT READ. Zero is a finding, never a pass.\n inspectedLabel: string; // what those items are, for the sentence that reports it\n measured: Record; // the workings, kept so a queried figure can be traced\n findings: Finding[];\n};\n\nexport type WatchReport = {\n generatedAt: string;\n headline: string;\n inspected: number;\n checks: CheckResult[];\n findings: Finding[];\n};\n\nexport type Stream = { name: string; timestamps: unknown; whereToLook?: string };\nexport type RatioPoint = { label?: string; endMs?: number; total: number; matched: number };\nexport type RevenuePeriod = { label?: string; endMs?: number; activity: number; dollars: number };\nexport type Snapshot = { at?: string; counters?: Record };\n\nexport type WatchInput = {\n nowMs?: unknown;\n streams?: unknown;\n ratio?: { subject?: string; points?: unknown } | null;\n revenue?: { subject?: string; periods?: unknown } | null;\n journal?: unknown;\n snapshots?: unknown;\n counterLabels?: Record | null;\n};\n\nconst HOUR = 3_600_000;\n\n// ---------------------------------------------------------------------------------------------\n// THE CONSTANTS, and why each one is the number it is. Every one of these is a judgement about\n// how loud this thing should be, so each is named, exported and testable rather than buried at a\n// call site where nobody can find it to argue with it.\n// ---------------------------------------------------------------------------------------------\n\n/** Below this many records a source has no rhythm worth quoting, and saying so is the honest move. */\nexport const MIN_RECORDS_FOR_RHYTHM = 5;\n\n/**\n * Only the most recent gaps are measured. A source that changes pace has to be able to\n * re-baseline: the payment feed moved from weekly invoicing to daily card takings in June, and a\n * rhythm averaged over all of history would still be judging today against a habit it dropped.\n */\nexport const MAX_GAPS_CONSIDERED = 30;\n\n/**\n * THE QUIET SPELL, not the longest outage. Read against the MAXIMUM gap in history, one bad\n * fortnight silently raises the bar past which any future outage would be reported: the next one\n * has to beat a record before anybody hears about it. The 90th percentile says \"longer than\n * almost every quiet spell this source normally has\" and cannot be dragged by a single hole.\n */\nexport const QUIET_QUANTILE = 0.9;\nexport const QUIET_MULTIPLE = 1.5; // half again past its own worst ordinary silence\nexport const NORMAL_MULTIPLE = 3; // or three times its ordinary gap, whichever is longer\n\n/**\n * THE OVERNIGHT FLOOR. New contact records arrive about every 25 minutes during the day and stop\n * at night. Judged on gaps alone that source is \"silent for twenty times its normal gap\" at 3am\n * every single night, and a report that cries wolf every morning is a report nobody opens on the\n * morning it is right. 26 hours clears a night, a weekend morning and a public holiday opening.\n */\nexport const MIN_EXPECT_HOURS = 26;\n\n/** Twice past the point where it became out of character is today's problem, not this week's. */\nexport const URGENT_MULTIPLE = 2;\n\n/** A collapse is a third of the baseline share gone AND ten points of it in absolute terms. */\nexport const RATIO_RELATIVE_FALL = 0.33;\nexport const RATIO_ABSOLUTE_FALL = 0.1;\n/** Half the baseline share gone is not a wobble, it is a fault, and it is today's problem. */\nexport const RATIO_URGENT_RELATIVE_FALL = 0.5;\n/** A verdict on two payments is not a verdict. Below this the check says so instead. */\nexport const RATIO_MIN_LATEST = 5;\n\n/** Four fifths of the usual money gone. A half is a trading question; this is a plumbing one. */\nexport const REVENUE_DOLLAR_FALL = 0.8;\n/** ...while at least half the usual amount of work still arrived. Both halves, or it is a slow month. */\nexport const REVENUE_ACTIVITY_HELD = 0.5;\n/** LESSONS #13. A baseline of two records a period cannot carry an accusation. */\nexport const REVENUE_MIN_BASELINE_ACTIVITY = 5;\n/** Fewer periods than this and there is no \"usual\" to compare the latest one against. */\nexport const REVENUE_MIN_PERIODS = 4;\n\n/**\n * The bridge is judged on its RECENT rows only. This journal holds 265 failures from three bad\n * days in July that were found and fixed. A check that fires on any error ever recorded is red\n * forever, and a permanently red check is a switched off one.\n */\nexport const BRIDGE_RECENT_ROWS = 100;\nexport const BRIDGE_ERROR_SHARE_URGENT = 0.2;\n\n// ---------------------------------------------------------------------------------------------\n// SAYING THINGS. Every one of these turns a value into words. Nothing below ever types a figure\n// beside the number it describes, which is the whole of engine/facts.ts in one rule.\n// ---------------------------------------------------------------------------------------------\n\nconst MONTH_NAMES = [\"January\", \"February\", \"March\", \"April\", \"May\", \"June\",\n \"July\", \"August\", \"September\", \"October\", \"November\", \"December\"];\n\n/** A duration in words that fit its size: minutes for an hour, hours for a day, days beyond that. */\nexport function sayGap(hours: unknown): string {\n const h = Number(hours);\n if (!Number.isFinite(h)) return \"an unknown length of time\";\n if (h <= 1) return `${Math.round(h * 60)} minutes`;\n if (h < 48) return `${Math.round(h)} hours`;\n const days = Math.round(h / 24);\n if (days < 60) return `${days} days`;\n // Past two months \"97 days\" stops meaning anything to a reader, so the months are said too.\n // Both figures, never the months alone: the day count is the one that can be checked.\n const months = Math.round(days / 30.44);\n return `${days} days, which is about ${months} months`;\n}\n\n/** A date a person can read, in UTC so a replay of a past morning says the same thing every time. */\nexport function sayDate(ms: unknown): string {\n const t = Number(ms);\n if (!Number.isFinite(t)) return \"a date this could not read\";\n const d = new Date(t);\n if (Number.isNaN(d.getTime())) return \"a date this could not read\";\n return `${d.getUTCDate()} ${MONTH_NAMES[d.getUTCMonth()]} ${d.getUTCFullYear()}`;\n}\n\n/** Money, always to the cent and always with its thousands separators. */\nexport function money(n: unknown): string {\n const v = Number(n);\n if (!Number.isFinite(v)) return \"an amount this could not read\";\n const [whole, frac] = Math.abs(v).toFixed(2).split(\".\");\n return `${v < 0 ? \"minus \" : \"\"}$${whole.replace(/\\B(?=(\\d{3})+(?!\\d))/g, \",\")}.${frac}`;\n}\n\nconst WORDS = [\"no\", \"one\", \"two\", \"three\", \"four\", \"five\", \"six\", \"seven\", \"eight\", \"nine\", \"ten\"];\nconst countWord = (n: number) => WORDS[n] ?? String(n);\nconst capitalise = (s: string) => s.replace(/^./, (c) => c.toUpperCase());\nconst plural = (n: number, one: string, many: string) => (n === 1 ? one : many);\nconst commas = (n: number) => Number(n ?? 0).toLocaleString(\"en-US\");\nconst percent = (x: number) => `${Math.round(x * 100)}%`;\n\n/** The subject as a bare noun: \"your bookings\" is what she calls them, \"bookings\" is what counts them. */\nconst unitOf = (subject: string) => String(subject ?? \"records\").replace(/^(your|the)\\s+/i, \"\");\n\n// ---------------------------------------------------------------------------------------------\n// THE MEASUREMENT. A rhythm read off the source itself.\n//\n// Everything else in this file rests on this function, so it is worth saying what it deliberately\n// does NOT do. It does not take a threshold. It does not know what kind of source it is looking\n// at. It reads the gaps between the things that actually arrived and reports how long this source\n// normally goes quiet for. A monitor built on typed thresholds is a monitor that is wrong for\n// every source but the one somebody had in mind when they typed it.\n// ---------------------------------------------------------------------------------------------\n\nexport type Rhythm = {\n records: number; // how many readable timestamps went into this\n gapsUsed: number; // how many gaps the figures below were measured from\n normalGapH: number; // the median gap: what \"usually\" means for this source\n quietGapH: number; // its ordinary worst quiet spell, at the 90th percentile\n longestGapH: number; // the worst hole in the history it was given, reported and NOT used\n expectByH: number; // past this it is out of character for this source\n};\n\n/** Every readable timestamp in a list, as milliseconds, oldest first. Unreadable ones are dropped. */\nexport function readTimes(list: unknown): number[] {\n if (!Array.isArray(list)) return [];\n const out: number[] = [];\n for (const v of list) {\n // A number is already milliseconds; anything else has to survive Date.parse to count.\n const t = typeof v === \"number\" ? v : Date.parse(String(v ?? \"\"));\n if (Number.isFinite(t)) out.push(t as number);\n }\n // SORTED, ALWAYS. The live feed comes back newest first, fixtures come back oldest first, and a\n // jittered series is in neither order. Measuring gaps off an unsorted list produces negative\n // gaps and a median that means nothing.\n return out.sort((a, b) => a - b);\n}\n\n/**\n * The rhythm of a source, or null when there is not enough of it to have one.\n *\n * Null is a real answer here, not a failure: it is what makes \"there is not enough history to\n * judge this\" sayable out loud instead of being rounded to either an alarm or an all clear.\n */\nexport function rhythmOf(list: unknown): Rhythm | null {\n const times = readTimes(list);\n if (times.length < MIN_RECORDS_FOR_RHYTHM) return null;\n const allGaps: number[] = [];\n for (let i = 1; i < times.length; i++) allGaps.push((times[i] - times[i - 1]) / HOUR);\n if (!allGaps.length) return null;\n // RECENT HISTORY ONLY, so a source that changes pace re-baselines instead of being judged\n // forever against a habit it has dropped.\n const gaps = allGaps.slice(-MAX_GAPS_CONSIDERED);\n const normalGapH = quantile(gaps, 0.5) as number;\n const quietGapH = quantile(gaps, QUIET_QUANTILE) as number;\n // The longest gap is REPORTED so it can be looked at, and deliberately not used as the\n // yardstick. See QUIET_QUANTILE above for what happens when it is.\n const longestGapH = Math.max(...allGaps);\n const expectByH = Math.max(quietGapH * QUIET_MULTIPLE, normalGapH * NORMAL_MULTIPLE, MIN_EXPECT_HOURS);\n return { records: times.length, gapsUsed: gaps.length, normalGapH, quietGapH, longestGapH, expectByH };\n}\n\n/** The value at a quantile, interpolated. Null on an empty list, never a confident zero. */\nexport function quantile(values: number[], q: number): number | null {\n if (!Array.isArray(values) || !values.length) return null;\n const a = [...values].sort((x, y) => x - y);\n const pos = (a.length - 1) * q;\n const lo = Math.floor(pos);\n const hi = Math.ceil(pos);\n if (lo === hi) return a[lo];\n return a[lo] + (a[hi] - a[lo]) * (pos - lo);\n}\n\n/** urgent once it is twice past the point where it stopped being in character, attention before. */\nconst escalate = (ageH: number, expectByH: number): Severity =>\n (ageH >= expectByH * URGENT_MULTIPLE ? \"urgent\" : \"attention\");\n\n// ---------------------------------------------------------------------------------------------\n// A CHECK THAT READ NOTHING.\n//\n// This is the single most important function in the file, which is why it is this near the top.\n// Every check routes its empty case through it, so there is exactly one place where \"I inspected\n// nothing\" is turned into words, and exactly one place to break in order to prove the whole\n// arrangement still works (tests/negative-controls.mjs does exactly that).\n// ---------------------------------------------------------------------------------------------\nexport function blindCheck(check: string, title: string, inspectedLabel: string, why: string, checkFirst: string): CheckResult {\n return {\n check,\n title,\n inspected: 0,\n inspectedLabel,\n measured: { inspected: 0 },\n // SEVERITY STAYS \"urgent\" AND SIX TESTS HOLD IT THERE (W10, W19, W26, W31, W37, W42). A check\n // that read nothing must never be quiet. What was wrong was not the severity, it was the\n // HEADLINE: it counted blind spots as business problems and said \"two things need you to look at\n // today\" when both were unwired checks. That is fixed in headlineFor and in the section split\n // below, which separate \"a check found a fault\" from \"a check could not look\" WITHOUT making the\n // second one quiet. Relabelling this to \"note\" was tried on 16 Aug and the tests rejected it,\n // correctly: it is the guarantee, not the wording.\n findings: [{ check, severity: \"urgent\", sentence: why, numbers: { inspected: 0 }, checkFirst }],\n };\n}\n\n/**\n * THE BACKSTOP. Any check that inspected nothing and said nothing about it. This should always be\n * empty, because every check above routes its empty case through blindCheck. It is here because\n * \"should always be empty\" is exactly the kind of claim that quietly stops being true, and\n * scripts/watch-run.mjs refuses to write a report while this returns anything.\n */\nexport function blindSpots(checks: unknown): CheckResult[] {\n return (Array.isArray(checks) ? checks : []).filter((c) => c && c.inspected === 0 && (!c.findings || c.findings.length === 0));\n}\n\n// ---------------------------------------------------------------------------------------------\n// CHECK 1: SILENCE WHERE THERE SHOULD BE NOISE. This is the 19 February check.\n//\n// A source that normally produces records has produced none for longer than it normally goes\n// quiet. Every source is judged against its own rhythm: the payment feed against the payment\n// feed's habits, the fortnightly form payments against the fortnightly form payments'. Judging\n// them all by one clock is how the fortnightly source becomes a false alarm every fortnight.\n// ---------------------------------------------------------------------------------------------\n\nconst SILENCE = \"silence\";\nconst SILENCE_TITLE = \"Sources that have gone quiet\";\nconst SILENCE_LABEL = \"timestamps\";\n\nexport function silenceFindings(streams: unknown, nowMs: unknown): CheckResult {\n const now = Number(nowMs);\n const list = (Array.isArray(streams) ? streams : []) as Stream[];\n const prepared = list.map((s) => ({\n name: String(s?.name ?? \"a source with no name\"),\n whereToLook: typeof s?.whereToLook === \"string\" ? s.whereToLook : null,\n times: readTimes(s?.timestamps),\n }));\n const inspected = prepared.reduce((a, s) => a + s.times.length, 0);\n\n if (!Number.isFinite(now) || inspected === 0) {\n return blindCheck(SILENCE, SILENCE_TITLE, SILENCE_LABEL,\n `This check read nothing at all, so it cannot tell you whether anything has stopped arriving. ` +\n `A check that inspects nothing is a blind spot, not a clean result, and it is being reported as one.`,\n `Check that the connection to your CRM is still working, then run this again. Until it reads something, ` +\n `treat the sources it was meant to watch as unwatched rather than healthy.`);\n }\n\n const findings: Finding[] = [];\n const perSource: Record[] = [];\n\n for (const s of prepared) {\n const r = rhythmOf(s.times);\n if (r === null) {\n // NOT A SILENT PASS. A source nothing can be measured on is a source nothing is watching,\n // and she should be told that in the same breath as she is told everything else is fine.\n findings.push({\n check: SILENCE,\n severity: \"note\",\n sentence:\n `There is not enough history for ${s.name} to say what normal looks like: ${s.times.length} ` +\n `${plural(s.times.length, \"record\", \"records\")}, where this needs ${MIN_RECORDS_FOR_RHYTHM} before it can ` +\n `measure a rhythm. Nothing is watching this source yet, which is worth knowing rather than reading as a clean result.`,\n numbers: { source: s.name, records: s.times.length, needed: MIN_RECORDS_FOR_RHYTHM },\n checkFirst:\n `Nothing to do today. Once ${MIN_RECORDS_FOR_RHYTHM} records have arrived here this will start ` +\n `watching it on its own, and until then treat it as unwatched.`,\n });\n perSource.push({ source: s.name, records: s.times.length, rhythm: \"not enough history\" });\n continue;\n }\n const lastMs = s.times[s.times.length - 1];\n const ageH = (now - lastMs) / HOUR;\n perSource.push({\n source: s.name,\n records: r.records,\n normalGapH: Math.round(r.normalGapH * 10) / 10,\n quietGapH: Math.round(r.quietGapH * 10) / 10,\n expectByH: Math.round(r.expectByH * 10) / 10,\n quietForHours: Math.round(ageH * 10) / 10,\n });\n if (ageH <= r.expectByH) continue;\n const severity = escalate(ageH, r.expectByH);\n // THE FIRST MOVE. A stream that knows where its own answer lives brings its own sentence:\n // scripts/watch-run.mjs hands the payment feed one, because that is the stream whose silence\n // means what February meant. Everything else gets this, which is the same move generalised.\n const checkFirst = s.whereToLook ??\n `Open the Square app and compare what it has taken since ${sayDate(lastMs)} against what your CRM shows for ` +\n `${s.name}. If Square has money the CRM does not, sales are being rung up in a way that never reaches a customer record.`;\n findings.push({\n check: SILENCE,\n severity,\n sentence:\n `Nothing has come through from ${s.name} for ${sayGap(ageH)}. The last one was on ${sayDate(lastMs)}. ` +\n `Before that this source produced something every ${sayGap(r.normalGapH)} on average, and the longest it ` +\n `normally stays quiet is ${sayGap(r.quietGapH)}, so this is well outside its own habits rather than outside ` +\n `a figure somebody chose.`,\n numbers: {\n source: s.name,\n lastRecordAt: new Date(lastMs).toISOString(),\n quietForHours: Math.round(ageH * 10) / 10,\n normalGapHours: Math.round(r.normalGapH * 10) / 10,\n quietGapHours: Math.round(r.quietGapH * 10) / 10,\n outOfCharacterAfterHours: Math.round(r.expectByH * 10) / 10,\n recordsMeasured: r.records,\n },\n checkFirst,\n });\n }\n\n return {\n check: SILENCE,\n title: SILENCE_TITLE,\n inspected,\n inspectedLabel: SILENCE_LABEL,\n measured: { sources: prepared.length, timestamps: inspected, perSource },\n findings,\n };\n}\n\n// ---------------------------------------------------------------------------------------------\n// CHECK 2: A RATIO COLLAPSE. Payments still arrive; the share of them reaching a customer record\n// falls away against its own recent baseline.\n//\n// THE TRAP THIS CHECK HAS TO AVOID, and the reason W17 exists: nought matched out of nought\n// arriving is not nought percent matching. Calling it a collapse raises a second alarm for one\n// fault and names the wrong cause, sending her to look at the matcher when the payments never\n// arrived at all.\n// ---------------------------------------------------------------------------------------------\n\nconst RATIO = \"match-ratio\";\nconst RATIO_TITLE = \"Payments reaching a customer record\";\nconst RATIO_LABEL = \"payments\";\n\nexport function matchRatioFindings(points: unknown, subject: unknown): CheckResult {\n const what = String(subject ?? \"payments\");\n const list = (Array.isArray(points) ? points : []) as RatioPoint[];\n const clean = list.map((p) => ({\n label: String(p?.label ?? \"a window\"),\n endMs: Number(p?.endMs),\n total: Math.max(0, Number(p?.total) || 0),\n matched: Math.max(0, Number(p?.matched) || 0),\n }));\n const inspected = clean.reduce((a, p) => a + p.total, 0);\n\n if (inspected === 0) {\n return blindCheck(RATIO, RATIO_TITLE, RATIO_LABEL,\n `This check read no ${what} at all, so it cannot tell you whether they are still reaching a customer record. ` +\n `A check that inspects nothing is a blind spot, not a clean result, and it is being reported as one.`,\n `Check that the Square link is still running and still writing to its own log, then run this again.`);\n }\n\n const latest = clean[clean.length - 1];\n const base = clean.slice(0, -1);\n const baseTotal = base.reduce((a, p) => a + p.total, 0);\n const baseMatched = base.reduce((a, p) => a + p.matched, 0);\n const measured: Record = {\n windows: clean.length,\n payments: inspected,\n latestTotal: latest.total,\n latestMatched: latest.matched,\n baselineTotal: baseTotal,\n baselineMatched: baseMatched,\n };\n const result = (findings: Finding[]): CheckResult =>\n ({ check: RATIO, title: RATIO_TITLE, inspected, inspectedLabel: RATIO_LABEL, measured, findings });\n\n if (baseTotal === 0) {\n return result([{\n check: RATIO,\n severity: \"note\",\n sentence:\n `There is no earlier run of ${what} to compare the latest ${commas(latest.total)} against, so this cannot ` +\n `judge whether the share reaching a customer record has moved. It will be able to from the next run on.`,\n numbers: { subject: what, latestTotal: latest.total, baselineTotal: baseTotal, windows: clean.length },\n checkFirst: `Nothing to do today. This needs one more period of history before it can say anything useful here.`,\n }]);\n }\n\n if (latest.total === 0) {\n // AN ABSENCE, DESCRIBED AS AN ABSENCE. Never as a collapse to nought percent.\n return result([{\n check: RATIO,\n severity: \"note\",\n sentence:\n `No ${what} arrived at all in the latest window, so there is nothing to work out a share from. ` +\n `That is a different problem from the ones this check watches for, and the list of sources that have gone ` +\n `quiet is where it will show up.`,\n numbers: { subject: what, latestTotal: 0, baselineTotal: baseTotal, windows: clean.length },\n checkFirst:\n `Look at the sources that have gone quiet, further up. If nothing there names ${what}, open the Square app ` +\n `and check whether any sale has been taken at all in the last week.`,\n }]);\n }\n\n if (latest.total < RATIO_MIN_LATEST) {\n // LESSONS #13, in its other shape. A verdict on two payments is not a verdict.\n return result([{\n check: RATIO,\n severity: \"note\",\n sentence:\n `Only ${commas(latest.total)} ${plural(latest.total, \"payment\", \"payments\")} arrived in the latest window, ` +\n `which is too few to judge a matching rate on. This needs at least ${RATIO_MIN_LATEST} before it will call ` +\n `a fall in the share reaching a customer record, because a wrong alarm here spends the attention a real one will need.`,\n numbers: { subject: what, latestTotal: latest.total, needed: RATIO_MIN_LATEST, baselineTotal: baseTotal },\n checkFirst: `Nothing to do today. This will judge the share again as soon as a normal week's worth of payments has arrived.`,\n }]);\n }\n\n const baseShare = baseMatched / baseTotal;\n const latestShare = latest.matched / latest.total;\n const relativeFall = baseShare > 0 ? (baseShare - latestShare) / baseShare : 0;\n const absoluteFall = baseShare - latestShare;\n const fires = relativeFall >= RATIO_RELATIVE_FALL && absoluteFall >= RATIO_ABSOLUTE_FALL;\n measured.baselineSharePercent = Math.round(baseShare * 100);\n measured.latestSharePercent = Math.round(latestShare * 100);\n if (!fires) return result([]);\n\n const latestUnmatched = latest.total - latest.matched;\n return result([{\n check: RATIO,\n severity: relativeFall >= RATIO_URGENT_RELATIVE_FALL ? \"urgent\" : \"attention\",\n sentence:\n `${capitalise(what)} are still arriving, and the share of them reaching a customer record has fallen from ` +\n `${percent(baseShare)} to ${percent(latestShare)}. In the latest window ${commas(latestUnmatched)} of ` +\n `${commas(latest.total)} reached nobody at all. The money is still being taken; it is the record of who paid it ` +\n `that is going missing.`,\n numbers: {\n subject: what,\n latestTotal: latest.total,\n latestMatched: latest.matched,\n latestUnmatched,\n latestSharePercent: Math.round(latestShare * 100),\n baselineSharePercent: Math.round(baseShare * 100),\n baselineTotal: baseTotal,\n windowsCompared: clean.length,\n },\n checkFirst:\n `Open the Square link's own log and look at the most recent entries for a sale that did not find a customer. ` +\n `The weekly exception report lists every one of them by name and amount, and that is the list to work from.`,\n }]);\n}\n\n// ---------------------------------------------------------------------------------------------\n// CHECK 3: A REVENUE CHANNEL GOING QUIET WHILE THE ACTIVITY CONTINUES. THE FEBRUARY SHAPE.\n//\n// This is the one the whole file exists for. Six ordinary periods of about 45 bookings and about\n// $7,000 taken, then a period in which the same number of bookings arrived and not one dollar was\n// recorded against them. The live account did exactly that: 48 payment records and $7,386.50 in\n// February, then 37 records and $0.00 in March, 21 and $0.00 in April, 18 and $0.00 in May.\n//\n// BOTH HALVES OR NOTHING. Money down and work down together is a slow month, which she can\n// already see out of the window, and raising it would be inventing an alarm about business\n// conditions. Money down while the work held is a plumbing fault, and she cannot see that at all.\n// ---------------------------------------------------------------------------------------------\n\nconst REVENUE = \"revenue-quiet\";\nconst REVENUE_TITLE = \"Money recorded against the work\";\nconst REVENUE_LABEL = \"records of activity\";\n\nexport function revenueChannelFindings(periods: unknown, subject: unknown): CheckResult {\n const what = String(subject ?? \"your bookings\");\n const unit = unitOf(what);\n const list = (Array.isArray(periods) ? periods : []) as RevenuePeriod[];\n const clean = list.map((p) => ({\n label: String(p?.label ?? \"a period\"),\n endMs: Number(p?.endMs),\n activity: Math.max(0, Number(p?.activity) || 0),\n dollars: Math.max(0, Number(p?.dollars) || 0),\n }));\n const inspected = clean.reduce((a, p) => a + p.activity, 0);\n\n if (inspected === 0) {\n return blindCheck(REVENUE, REVENUE_TITLE, REVENUE_LABEL,\n `This check read no record of any work at all, so it cannot tell you whether the money against it is being ` +\n `written down. A check that inspects nothing is a blind spot, not a clean result, and it is being reported as one.`,\n `Check that the connection to your CRM is still working, then run this again. This is the check that would ` +\n `have caught the five month gap, so it reading nothing matters more than most.`);\n }\n\n const latest = clean[clean.length - 1];\n const base = clean.slice(0, -1);\n const measured: Record = {\n periods: clean.length,\n recordsOfActivity: inspected,\n latestActivity: latest.activity,\n latestDollars: latest.dollars,\n };\n const result = (findings: Finding[]): CheckResult =>\n ({ check: REVENUE, title: REVENUE_TITLE, inspected, inspectedLabel: REVENUE_LABEL, measured, findings });\n\n if (clean.length < REVENUE_MIN_PERIODS) {\n return result([{\n check: REVENUE,\n severity: \"note\",\n sentence:\n `There are only ${clean.length} periods of history for ${what}, and this needs ${REVENUE_MIN_PERIODS} before ` +\n `it can say what a normal period looks like. It cannot judge the latest one yet, and guessing would be worse ` +\n `than saying so.`,\n numbers: { subject: what, periods: clean.length, needed: REVENUE_MIN_PERIODS },\n checkFirst: `Nothing to do today. This will start judging as soon as there are ${REVENUE_MIN_PERIODS} periods to read.`,\n }]);\n }\n\n // THE BASELINE IS A MEDIAN, not an average. One freak month with a $4,000 boarding block in it\n // drags an average up and makes every ordinary month afterwards look like a collapse.\n const baseActivity = quantile(base.map((p) => p.activity), 0.5) as number;\n const baseDollars = Math.round((quantile(base.map((p) => p.dollars), 0.5) as number) * 100) / 100;\n measured.usualActivity = Math.round(baseActivity);\n measured.usualDollars = baseDollars;\n\n if (baseActivity < REVENUE_MIN_BASELINE_ACTIVITY) {\n // LESSONS #13, the sentence that reads as a glitch. Right arithmetic, no denominator.\n return result([{\n check: REVENUE,\n severity: \"note\",\n sentence:\n `Over the ${base.length} periods before the latest one, ${what} ran at about ${Math.round(baseActivity)} ` +\n `${unit} a period, which is too little to say what a normal period looks like. This cannot judge the latest ` +\n `period against a baseline that thin, and it would rather tell you so than put a figure in front of you that ` +\n `reads as a glitch.`,\n numbers: {\n subject: what,\n usualActivity: Math.round(baseActivity),\n needed: REVENUE_MIN_BASELINE_ACTIVITY,\n latestActivity: latest.activity,\n latestDollars: latest.dollars,\n periods: clean.length,\n },\n checkFirst:\n `Nothing to do today. Once this channel has run at ${REVENUE_MIN_BASELINE_ACTIVITY} or more records a period ` +\n `for a few periods, this will start judging it properly.`,\n }]);\n }\n\n if (!(baseDollars > 0)) {\n // THE HONEST LIMIT OF THIS CHECK, said out loud rather than left to be discovered. Once every\n // period in view is already at zero there is nothing left to fall from, and silence here would\n // read as a clean bill of health for the exact fault this check was built for.\n return result([{\n check: REVENUE,\n severity: \"note\",\n sentence:\n `Over the ${base.length} periods before the latest one, no money at all was recorded against ${what}, so there ` +\n `is no normal level for this one to have fallen from. This cannot judge whether anything is wrong here: a fault ` +\n `that has run long enough to become the baseline stops looking like a fall. Take this as the monitor saying it ` +\n `is blind on this channel, not as an all clear.`,\n numbers: {\n subject: what,\n usualDollars: baseDollars,\n latestActivity: latest.activity,\n latestDollars: latest.dollars,\n periods: clean.length,\n },\n checkFirst:\n `Open the Square app and total what it has taken over the last few months, then compare that with what your ` +\n `CRM shows for the same months. If Square has money the CRM does not, the two have been disconnected for ` +\n `longer than this report can see.`,\n }]);\n }\n\n const dollarFall = 1 - latest.dollars / baseDollars;\n const activityHeld = latest.activity >= baseActivity * REVENUE_ACTIVITY_HELD;\n measured.dollarFallPercent = Math.round(dollarFall * 100);\n measured.activityHeld = activityHeld;\n\n if (dollarFall < REVENUE_DOLLAR_FALL || !activityHeld) {\n return result([]);\n }\n\n const usualActivity = Math.round(baseActivity);\n const shareOfMoneyMissing = Math.round(dollarFall * 100);\n const heldPhrase = latest.activity >= baseActivity\n ? \"as many as usual or more\"\n : `${Math.round((latest.activity / baseActivity) * 100)}% of the usual number`;\n const sentence =\n `In the latest period ${commas(latest.activity)} ${unit} were recorded, which is ${heldPhrase}, ` +\n `and the money recorded against them came to ${money(latest.dollars)}. ` +\n `Over the ${base.length} periods before it the usual figures were ${commas(usualActivity)} ${unit} and ` +\n `${money(baseDollars)}. The work carried on and ${shareOfMoneyMissing}% of the money that normally comes with it ` +\n `was never written down, which means it is being taken somewhere your CRM never hears about.`;\n\n return result([{\n check: REVENUE,\n severity: \"urgent\",\n sentence,\n numbers: {\n subject: what,\n latestActivity: latest.activity,\n latestDollars: latest.dollars,\n usualActivity,\n usualDollars: baseDollars,\n shareOfMoneyMissing,\n periodsCompared: clean.length,\n },\n checkFirst:\n `Open the Square app and total what it has taken over the same period. If Square shows sales your CRM does not, ` +\n `sales are being rung up in a way that never reaches a customer record, which is exactly what happened after ` +\n `19 February 2026.`,\n }]);\n}\n\n// ---------------------------------------------------------------------------------------------\n// CHECK 4: THE BRIDGE ITSELF. The Square link either erroring right now, or no longer writing\n// anything down at all.\n//\n// TWO FAULTS, TWO SENTENCES. \"It is failing\" and \"it has stopped\" are different problems with\n// different first moves, and collapsing them into one alarm sends her to the wrong place.\n// ---------------------------------------------------------------------------------------------\n\nconst BRIDGE = \"bridge\";\nconst BRIDGE_TITLE = \"The Square link\";\nconst BRIDGE_LABEL = \"journal rows\";\n\nconst isErrorRow = (r: any) =>\n String(r?.kind ?? \"\").toUpperCase() === \"ERROR\" || (typeof r?.error === \"string\" && r.error.length > 0);\n\nexport function bridgeFindings(rows: unknown, nowMs: unknown): CheckResult {\n const now = Number(nowMs);\n const list = Array.isArray(rows) ? rows : [];\n const inspected = list.length;\n\n if (!Number.isFinite(now) || inspected === 0) {\n return blindCheck(BRIDGE, BRIDGE_TITLE, BRIDGE_LABEL,\n `The Square link's own log came back with nothing in it that could be read, so this cannot tell you whether ` +\n `the link is working. A check that inspects nothing is a blind spot, not a clean result, and an unreadable log ` +\n `is the loudest thing in this report rather than the quietest.`,\n `Open the Square link's own page and check it answers at all. If it does and the log is genuinely empty, ` +\n `every sale taken since it last wrote something down is unaccounted for.`);\n }\n\n // Rows with a readable date, oldest first. The rest are counted and reported, never guessed at.\n const stamped = (list as any[])\n .map((r) => ({ row: r, ms: Date.parse(String(r?.ts ?? \"\")) }))\n .filter((x) => Number.isFinite(x.ms))\n .sort((a, b) => a.ms - b.ms);\n\n const measured: Record = {\n rows: inspected,\n rowsWithATimestamp: stamped.length,\n };\n const result = (findings: Finding[]): CheckResult =>\n ({ check: BRIDGE, title: BRIDGE_TITLE, inspected, inspectedLabel: BRIDGE_LABEL, measured, findings });\n\n if (stamped.length === 0) {\n return result([{\n check: BRIDGE,\n severity: \"urgent\",\n sentence:\n `The Square link's log has ${commas(inspected)} ${plural(inspected, \"entry\", \"entries\")} in it and not one of ` +\n `them carries a date this can read. Without dates there is no way to tell a link that stopped last night from ` +\n `one that stopped in March, so this is being raised rather than passed over.`,\n numbers: { rows: inspected, rowsWithATimestamp: 0 },\n checkFirst:\n `Open the Square link's own log and look at the newest few entries. If they carry no time against them, the ` +\n `link is writing in a shape this report cannot read and that needs fixing before any of it can be believed.`,\n }]);\n }\n\n // ONLY THE RECENT ROWS. See BRIDGE_RECENT_ROWS: a check that fires on any error ever recorded is\n // red forever, and 265 failures from three fixed days in July would keep it that way.\n const recent = stamped.slice(-BRIDGE_RECENT_ROWS);\n const recentSet = new Set(recent);\n const errorsInRecentRows = recent.filter((x) => isErrorRow(x.row)).length;\n const errorsBeforeThat = stamped.filter((x) => !recentSet.has(x) && isErrorRow(x.row)).length;\n const errorShare = recent.length ? errorsInRecentRows / recent.length : 0;\n measured.recentRows = recent.length;\n measured.errorsInRecentRows = errorsInRecentRows;\n measured.errorsBeforeThat = errorsBeforeThat;\n\n const findings: Finding[] = [];\n\n if (errorsInRecentRows > 0) {\n findings.push({\n check: BRIDGE,\n severity: errorShare >= BRIDGE_ERROR_SHARE_URGENT ? \"urgent\" : \"attention\",\n sentence:\n `The Square link is failing as it runs. ${commas(errorsInRecentRows)} of its last ${commas(recent.length)} ` +\n `entries are failures, which is ${percent(errorShare)} of them. Every one of those is a sale that reached ` +\n `Square and did not reach a customer record in your CRM.`,\n numbers: {\n errorsInRecentRows,\n recentRows: recent.length,\n errorSharePercent: Math.round(errorShare * 100),\n errorsBeforeThat,\n },\n checkFirst:\n `The weekly exception report lists every sale that did not reach a customer record, by name and amount. ` +\n `Work from that list rather than from the log itself, and send me the report if the same name keeps appearing.`,\n });\n }\n\n const r = rhythmOf(stamped.map((x) => x.ms));\n const lastMs = stamped[stamped.length - 1].ms;\n const ageH = (now - lastMs) / HOUR;\n measured.quietForHours = Math.round(ageH * 10) / 10;\n if (r === null) {\n findings.push({\n check: BRIDGE,\n severity: \"note\",\n sentence:\n `The Square link's log holds only ${commas(stamped.length)} dated ${plural(stamped.length, \"entry\", \"entries\")}, ` +\n `which is too little for this to know how often it normally writes something. It cannot yet tell a quiet link ` +\n `from a stopped one.`,\n numbers: { rowsWithATimestamp: stamped.length, needed: MIN_RECORDS_FOR_RHYTHM },\n checkFirst: `Nothing to do today. This will be able to judge the link once its log has a little more history in it.`,\n });\n } else {\n measured.expectByH = Math.round(r.expectByH * 10) / 10;\n if (ageH > r.expectByH) {\n findings.push({\n check: BRIDGE,\n severity: escalate(ageH, r.expectByH),\n sentence:\n `The Square link has written nothing down for ${sayGap(ageH)}. The last thing it recorded was on ` +\n `${sayDate(lastMs)}. It normally writes something every ${sayGap(r.normalGapH)}, so it has not simply gone ` +\n `quiet, it has stopped. Anything taken in Square since then has not reached your CRM.`,\n numbers: {\n quietForHours: Math.round(ageH * 10) / 10,\n lastRowAt: new Date(lastMs).toISOString(),\n normalGapHours: Math.round(r.normalGapH * 10) / 10,\n outOfCharacterAfterHours: Math.round(r.expectByH * 10) / 10,\n rowsWithATimestamp: stamped.length,\n },\n checkFirst:\n `Open the Square link's own page and check it answers. If it does, take one card payment in Square and see ` +\n `whether it appears against a customer in your CRM within a few minutes.`,\n });\n }\n }\n\n return result(findings);\n}\n\n// ---------------------------------------------------------------------------------------------\n// CHECK 5: A FIGURE THAT SHOULD ONLY EVER GROW HAS GONE BACKWARDS.\n//\n// Lifetime totals only go up. When one comes back smaller, the reading is being taken from\n// somewhere else: a source was swapped, a query was cut at a date, a page walk stopped early. Each\n// of those has produced a wrong number in front of this client already, and each was invisible at\n// the time because the smaller figure was perfectly plausible on its own.\n//\n// A FIGURE THAT STOPS BEING REPORTED IS THE SAME DISEASE. It hides exactly what a fall hides, and\n// it looks like nothing at all on a page that only prints what it has.\n// ---------------------------------------------------------------------------------------------\n\nconst BACKWARDS = \"backwards\";\nconst BACKWARDS_TITLE = \"Running totals that should only grow\";\nconst BACKWARDS_LABEL = \"running totals\";\n\nexport function backwardsFindings(snapshots: unknown, labels: unknown): CheckResult {\n const named = (labels ?? {}) as Record;\n const nameOf = (key: string) => String(named?.[key] ?? key);\n const list = (Array.isArray(snapshots) ? snapshots : []) as Snapshot[];\n\n if (list.length === 0) {\n return blindCheck(BACKWARDS, BACKWARDS_TITLE, BACKWARDS_LABEL,\n `This check has no readings of your running totals at all, so it cannot tell whether any of them has gone ` +\n `backwards. A check that inspects nothing is a blind spot, not a clean result, and it is being reported as one.`,\n `Check that the file this keeps its earlier readings in still exists and can be read. Until it can, a total ` +\n `that shrinks will pass unnoticed.`);\n }\n\n const previous = list[list.length - 2];\n const current = list[list.length - 1];\n\n if (list.length < 2) {\n // A FIRST RUN IS NOT A CLEAN RUN. It compared nothing, so it says it compared nothing. This is\n // a note rather than an alarm because there is nothing wrong here, but it is still a finding,\n // because \"nothing to compare\" printed as blank space reads as \"everything checks out\".\n return {\n check: BACKWARDS,\n title: BACKWARDS_TITLE,\n inspected: 0,\n inspectedLabel: BACKWARDS_LABEL,\n measured: { readings: list.length, compared: 0 },\n findings: [{\n check: BACKWARDS,\n severity: \"note\",\n sentence:\n `This is the first time these running totals have been written down, so there is nothing yet to compare ` +\n `them against. That is not a clean result, it is an empty one, and from the next run on any figure that ` +\n `goes backwards will be named here.`,\n numbers: { readings: list.length, compared: 0 },\n checkFirst: `Nothing to do today. Run this again tomorrow and it will have something to compare against.`,\n }],\n };\n }\n\n const prevCounters = (previous?.counters ?? {}) as Record;\n const curCounters = (current?.counters ?? {}) as Record;\n const keys = [...new Set([...Object.keys(prevCounters), ...Object.keys(curCounters)])];\n const inspected = keys.length;\n const prevAt = Date.parse(String(previous?.at ?? \"\"));\n\n if (inspected === 0) {\n return blindCheck(BACKWARDS, BACKWARDS_TITLE, BACKWARDS_LABEL,\n `The last two readings of your running totals carry no figures at all, so there was nothing to compare. ` +\n `A check that inspects nothing is a blind spot, not a clean result, and it is being reported as one.`,\n `Check that the file this keeps its earlier readings in has not been emptied or overwritten.`);\n }\n\n const findings: Finding[] = [];\n for (const key of keys) {\n const before = Number(prevCounters[key]);\n const after = curCounters[key] === undefined || curCounters[key] === null ? null : Number(curCounters[key]);\n if (!Number.isFinite(before)) continue; // nothing to fall FROM: not a finding, just no history\n if (after === null || !Number.isFinite(after as number)) {\n findings.push({\n check: BACKWARDS,\n severity: \"attention\",\n sentence:\n `${nameOf(key)} was being reported and now is not. It read ${commas(before)} on ${sayDate(prevAt)} and the ` +\n `latest reading does not carry it at all. A figure that stops being reported hides exactly what a figure ` +\n `going backwards hides, so it is raised the same way.`,\n numbers: { counter: key, label: nameOf(key), previous: before, current: null, previousAt: previous?.at ?? null },\n checkFirst:\n `Check whether whatever produces this figure answered at all on the last run. A reading that failed and a ` +\n `reading of nought look the same on a page and mean opposite things.`,\n });\n continue;\n }\n if ((after as number) >= before) continue;\n const fell = before - (after as number);\n findings.push({\n check: BACKWARDS,\n severity: \"urgent\",\n sentence:\n `${nameOf(key)} has gone backwards. It read ${commas(before)} on ${sayDate(prevAt)} and reads ` +\n `${commas(after as number)} now, a fall of ${commas(fell)}. Figures like this only ever go up, so a fall means ` +\n `it is being read from somewhere different: a source swapped, a list cut short, or a page walk that stopped ` +\n `early and reported what it had as the whole.`,\n numbers: {\n counter: key,\n label: nameOf(key),\n previous: before,\n current: after,\n fell,\n previousAt: previous?.at ?? null,\n currentAt: current?.at ?? null,\n },\n checkFirst:\n `Do not act on any figure derived from this one until it is explained. Send me this report and I will read ` +\n `the same total straight from the system that owns it.`,\n });\n }\n\n return {\n check: BACKWARDS,\n title: BACKWARDS_TITLE,\n inspected,\n inspectedLabel: BACKWARDS_LABEL,\n measured: { readings: list.length, compared: inspected, comparedAgainst: previous?.at ?? null },\n findings,\n };\n}\n\n// ---------------------------------------------------------------------------------------------\n// THE BUCKETING. Dates cut into windows, which is arithmetic and therefore testable.\n//\n// A RECORD WITH NO READABLE DATE IS NEVER INVENTED INTO A WINDOW. Dropping it understates a\n// window; guessing at it corrupts the baseline every later judgement is made against.\n// ---------------------------------------------------------------------------------------------\n\n/** Payments the bridge saw, cut into equal windows ending now, oldest window first. */\nexport function ratioBuckets(seen: unknown, nowMs: unknown, windowDays: number, windows: number): RatioPoint[] {\n const now = Number(nowMs);\n const spanMs = Math.max(1, Number(windowDays) || 1) * 24 * HOUR;\n const n = Math.max(1, Math.floor(Number(windows) || 1));\n const points = Array.from({ length: n }, (_, i) => {\n const endMs = now - (n - 1 - i) * spanMs;\n return { label: `the ${windowDays} days to ${sayDate(endMs)}`, endMs, total: 0, matched: 0 };\n });\n if (!Number.isFinite(now)) return points;\n for (const p of (Array.isArray(seen) ? seen : []) as any[]) {\n const at = Number(p?.atMs);\n if (!Number.isFinite(at)) continue;\n const back = Math.floor((now - at) / spanMs);\n if (back < 0 || back >= n) continue;\n const point = points[n - 1 - back];\n point.total += 1;\n if (p?.matched === true) point.matched += 1;\n }\n return points;\n}\n\n/** Records of work and the money against them, summed into equal windows, oldest window first. */\nexport function revenuePeriods(records: unknown, nowMs: unknown, windowDays: number, windows: number): RevenuePeriod[] {\n const now = Number(nowMs);\n const spanMs = Math.max(1, Number(windowDays) || 1) * 24 * HOUR;\n const n = Math.max(1, Math.floor(Number(windows) || 1));\n const periods = Array.from({ length: n }, (_, i) => {\n const endMs = now - (n - 1 - i) * spanMs;\n return { label: `the ${windowDays} days to ${sayDate(endMs)}`, endMs, activity: 0, dollars: 0 };\n });\n if (!Number.isFinite(now)) return periods;\n for (const rec of (Array.isArray(records) ? records : []) as any[]) {\n const at = Number(rec?.atMs);\n if (!Number.isFinite(at)) continue;\n const back = Math.floor((now - at) / spanMs);\n if (back < 0 || back >= n) continue;\n const period = periods[n - 1 - back];\n period.activity += 1;\n period.dollars += Number(rec?.dollars) || 0;\n }\n // Rounded to the cent at the end, not per addition: summing floats and rounding once is the only\n // version whose total matches what the CRM itself reports.\n for (const p of periods) p.dollars = Math.round(p.dollars * 100) / 100;\n return periods;\n}\n\n// ---------------------------------------------------------------------------------------------\n// THE WHOLE RUN.\n// ---------------------------------------------------------------------------------------------\n\nexport function runWatch(input: WatchInput): WatchReport {\n // A RUN THAT WAS NEVER TOLD THE TIME JUDGES NOTHING.\n //\n // The dangerous shape this refuses: a replay with a mistyped date silently reporting on today,\n // under a heading naming the date it was asked about, with every figure wrong and nothing in the\n // document able to see it. Inventing a clock here would be the one mistake this whole file could\n // make that nobody downstream could catch.\n const now = input?.nowMs;\n if (!Number.isFinite(now)) {\n return {\n generatedAt: \"not known\",\n headline: \"This check could not run, because it was not told what the time is.\",\n inspected: 0,\n checks: [],\n findings: [{\n check: \"clock\",\n severity: \"urgent\",\n sentence:\n `This run was not told what the time is, so it has judged nothing at all. Every figure in this report is ` +\n `measured against a moment, and inventing one would have produced a page of confident numbers about the ` +\n `wrong day. Nothing here is an all clear.`,\n numbers: { nowMs: String(now), inspected: 0 },\n checkFirst:\n `Run this again with the date it is meant to judge. If this was a replay of a past morning, check the date ` +\n `that was typed for it.`,\n }],\n };\n }\n const at = now as number;\n\n const checks: CheckResult[] = [\n silenceFindings(input?.streams, at),\n matchRatioFindings(input?.ratio?.points, input?.ratio?.subject ?? \"payments\"),\n revenueChannelFindings(input?.revenue?.periods, input?.revenue?.subject ?? \"your bookings\"),\n bridgeFindings(input?.journal, at),\n backwardsFindings(input?.snapshots, input?.counterLabels ?? {}),\n ];\n\n const inspected = checks.reduce((a, c) => a + (c.inspected ?? 0), 0);\n // MOST SEVERE FIRST, so the first thing she reads is the worst thing. A stable sort inside a\n // severity band keeps the checks in the order they ran, which is the order the report explains.\n const rank: Record = { urgent: 0, attention: 1, note: 2 };\n const findings = checks\n .flatMap((c) => c.findings.map((f) => ({ ...f, check: f.check ?? c.check })))\n .map((f, i) => ({ f, i }))\n .sort((a, b) => ((rank[a.f.severity] ?? 3) - (rank[b.f.severity] ?? 3)) || (a.i - b.i))\n .map((x) => x.f);\n\n return {\n generatedAt: new Date(at).toISOString(),\n headline: headlineFor(findings, checks, inspected),\n inspected,\n checks,\n findings,\n };\n}\n\n/**\n * The one line at the top. It leads with what has to happen today, and it never says a reassuring\n * thing about a run that could not see anything: \"nothing wrong\" and \"nothing looked at\" have to\n * be different sentences or the second one does the damage of the first.\n */\nexport function headlineFor(findings: Finding[], checks: CheckResult[], inspected: number): string {\n // v1.1 (16 Aug) — a finding from a check that read NOTHING is counted as a blind spot, never as a\n // problem with the business. Same rule as the section split in watchReportMarkdown; the two must\n // agree or the headline promises something the body does not contain.\n const isBlind = (f: Finding) => Number(f.numbers?.inspected) === 0;\n const n = (s: Severity) => findings.filter((f) => f.severity === s && !isBlind(f)).length;\n const urgent = n(\"urgent\");\n const attention = n(\"attention\");\n const notes = findings.filter((f) => f.severity === \"note\" || isBlind(f)).length;\n if (urgent) {\n return `${capitalise(countWord(urgent))} ${plural(urgent, \"thing needs\", \"things need\")} you to look at today` +\n `${attention ? `, and ${countWord(attention)} more ${plural(attention, \"is\", \"are\")} worth a look this week` : \"\"}.`;\n }\n if (attention) {\n return `${capitalise(countWord(attention))} ${plural(attention, \"thing is\", \"things are\")} worth a look this week.`;\n }\n if (notes) {\n // W42: when NOTHING could be read, \"nothing looks wrong\" is a reassuring sentence about a run\n // that judged nothing. Lead with the blindness instead. Only say the reassuring half when at\n // least one check actually read something and came back clean.\n const readSomething = checks.filter((c) => Number(c?.inspected) > 0).length;\n if (!readSomething) {\n return `Nothing could be checked. ${capitalise(countWord(notes))} ` +\n `${plural(notes, \"check\", \"checks\")} read no data at all, so this run judges nothing either way.`;\n }\n return `Nothing looks wrong in what could be checked, and ${countWord(notes)} ` +\n `${plural(notes, \"thing\", \"things\")} this monitor cannot see yet.`;\n }\n return `Nothing looks wrong. ${capitalise(countWord(checks.length))} checks ran and read ` +\n `${commas(inspected)} records between them.`;\n}\n\n// ---------------------------------------------------------------------------------------------\n// THE COPY SHE READS.\n//\n// TWO RULES, ENFORCED MECHANICALLY, and they run over the GENERATED report rather than over any\n// source file, because the sentences are built at run time and a rule that only reads source\n// cannot see them.\n// ---------------------------------------------------------------------------------------------\n\n/** One entry per rule broken, so an em dash and a spaced hyphen in one page are one problem, not two. */\nexport function copyProblems(text: unknown): string[] {\n const s = String(text ?? \"\");\n const out: string[] = [];\n // The name of a service this business does not offer. She asked for it never to appear.\n if (/\\bday\\s?care\\b/i.test(s)) out.push(\"names a service this business does not offer\");\n // A dash used as punctuation, in any of its forms. Hyphens INSIDE words are fine and common:\n // \"well known\" hyphenated, a phone number, a field name. Only a dash standing alone counts.\n if (/(^|\\s)[-–—](\\s|$)|[–—]/.test(s)) out.push(\"uses a dash as punctuation\");\n return out;\n}\n\n/**\n * THE ENGINE'S OWN VIEW of the report: every finding, the figures behind it, and what every check\n * read including the checks that found nothing.\n *\n * WHY THE CHECKS THAT FOUND NOTHING ARE PRINTED. A report that prints only problems gives the\n * reader no way to tell \"checked and clean\" from \"checked nothing\", and that exact confusion is\n * what let February run for five months.\n *\n * This is the workings, not the page for the owner. scripts/watch-run.mjs renders her page from\n * the same report object and keeps this one in the repo, so a queried figure can still be traced.\n */\nexport function watchReportMarkdown(report: WatchReport, title: unknown): string {\n const heading = String(title ?? \"Early warning check\");\n const findings = Array.isArray(report?.findings) ? report.findings : [];\n const checks = Array.isArray(report?.checks) ? report.checks : [];\n // v1.1 (16 Aug) — THE SPLIT IS \"DID IT READ ANYTHING\", NOT SEVERITY ALONE. A blind check keeps\n // severity \"urgent\" (six tests hold that, and it must never go quiet), but it is not a fault in\n // the business and it must not be filed as one. Before this, the report opened \"Two things need\n // you to look at today\" when both were checks that had never been wired up — the exact shape of\n // failure this page exists to prevent, pointed inward.\n const readNothing = (f: Finding) => Number(f.numbers?.inspected) === 0;\n const loud = findings.filter((f) => f.severity !== \"note\" && !readNothing(f));\n const notes = findings.filter((f) => f.severity === \"note\" || readNothing(f));\n const band: Record = {\n urgent: \"Look at this today\",\n attention: \"Worth a look this week\",\n note: \"The monitor talking about itself\",\n };\n const figures = (o: Record) =>\n Object.entries(o ?? {})\n .filter(([, v]) => v !== undefined && (typeof v !== \"object\" || v === null))\n .map(([k, v]) => `${k}: ${v === null ? \"not known\"\n\n=====FILE engine/watch.ts#2 =====\n : String(v)}`)\n .join(\", \");\n\n const out: string[] = [];\n out.push(`# ${heading}`);\n out.push(\"\");\n out.push(report?.headline ?? \"\");\n out.push(\"\");\n out.push(`Read at ${report?.generatedAt ?? \"not known\"}. ${commas(report?.inspected ?? 0)} records inspected across ${checks.length} checks.`);\n out.push(\"\");\n\n const say = (f: Finding) => {\n out.push(`### ${band[f.severity] ?? f.severity}. ${f.check}`);\n out.push(\"\");\n out.push(f.sentence);\n out.push(\"\");\n const fig = figures(f.numbers);\n if (fig) { out.push(`The figures behind that: ${fig}`); out.push(\"\"); }\n if (f.checkFirst) { out.push(`Check first: ${f.checkFirst}`); out.push(\"\"); }\n };\n\n if (loud.length) {\n out.push(`## What needs your attention`);\n out.push(\"\");\n for (const f of loud) say(f);\n }\n if (notes.length) {\n out.push(`## What this monitor cannot see yet`);\n out.push(\"\");\n out.push(\n `These are not problems with the business. They are the monitor saying where it is unable to judge anything, ` +\n `which is worth knowing rather than reading as a clean result.`);\n out.push(\"\");\n for (const f of notes) say(f);\n }\n\n out.push(`## What every check read, including the ones that found nothing`);\n out.push(\"\");\n for (const c of checks) {\n out.push(`${c.title}: read ${commas(c.inspected ?? 0)} ${c.inspectedLabel}, and raised ` +\n `${commas(c.findings?.length ?? 0)} ${plural(c.findings?.length ?? 0, \"finding\", \"findings\")}.`);\n const fig = figures(c.measured);\n if (fig) out.push(`The figures behind that: ${fig}`);\n out.push(\"\");\n }\n\n const blind = blindSpots(checks);\n out.push(`## Whether this report can be believed`);\n out.push(\"\");\n out.push(blind.length\n ? `${capitalise(countWord(blind.length))} ${plural(blind.length, \"check\", \"checks\")} inspected nothing and said ` +\n `nothing about it, which means this report is not watching what it claims to. Do not read it as a clean result.`\n : `Every check above reported the size of what it read, and every check that read nothing said so in its own ` +\n `finding rather than passing silently. 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