feat: operationalize frontend incident runbooks

Merge branch 'feature-web-vitals-performance-budget-contract' into develop
feat: enforce web vitals performance budgets
2026-07-25 21:30:40 +09:00 · 2026-07-25 21:26:51 +09:00 · 2026-07-25 21:26:51 +09:00 · 2026-07-25 21:22:35 +09:00
27 changed files with 1183 additions and 217 deletions
@@ -4,25 +4,21 @@
    "index": {
      "path": "/",
      "cacheControl": "no-cache",
-      "contentTypes": ["text/html"],
      "securityHeaders": true
    },
    "runtimeConfig": {
      "path": "/config.json",
      "cacheControl": "no-store",
-      "contentTypes": ["application/json"],
      "securityHeaders": true
    },
    "releaseManifest": {
      "path": "/release-manifest.json",
      "cacheControl": "no-store",
-      "contentTypes": ["application/json"],
      "securityHeaders": true
    },
    "hashedAsset": {
      "pathPattern": "/assets/*",
      "cacheControl": "public, max-age=31536000, immutable",
-      "contentTypes": ["text/javascript", "application/javascript"],
      "securityHeaders": false
    },
    "sourceMap": {
@@ -3,7 +3,6 @@
  "responses": {
    "index": {
      "cache-control": "no-cache",
-      "content-type": "text/html; charset=utf-8",
      "content-security-policy": "default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self' https:; font-src 'self'; upgrade-insecure-requests",
      "strict-transport-security": "max-age=31536000; includeSubDomains",
      "x-frame-options": "DENY",
@@ -13,7 +12,6 @@
    },
    "runtimeConfig": {
      "cache-control": "no-store",
-      "content-type": "application/json; charset=utf-8",
      "content-security-policy": "default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self' https:; font-src 'self'; upgrade-insecure-requests",
      "strict-transport-security": "max-age=31536000; includeSubDomains",
      "x-frame-options": "DENY",
@@ -23,7 +21,6 @@
    },
    "releaseManifest": {
      "cache-control": "no-store",
-      "content-type": "application/json; charset=utf-8",
      "content-security-policy": "default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self' https:; font-src 'self'; upgrade-insecure-requests",
      "strict-transport-security": "max-age=31536000; includeSubDomains",
      "x-frame-options": "DENY",
@@ -32,8 +29,7 @@
      "permissions-policy": "camera=(), microphone=(), geolocation=()"
    },
    "hashedAsset": {
-      "cache-control": "public, max-age=31536000, immutable",
-      "content-type": "text/javascript; charset=utf-8"
+      "cache-control": "public, max-age=31536000, immutable"
    }
  }
 }
@@ -0,0 +1,18 @@
+{
+  "schemaVersion": 1,
+  "bundle": {
+    "initialJsGzipBytes": 204800,
+    "lazyChunkGzipBytes": 122880
+  },
+  "lab": {
+    "lcpMs": 2500,
+    "cls": 0.1,
+    "namedInteractionMs": 200
+  },
+  "field": {
+    "p75LcpMs": 2500,
+    "p75Cls": 0.1,
+    "p75InpMs": 200,
+    "minimumEligibleSamples": null
+  }
+}
@@ -0,0 +1,5 @@
+{
+  "schemaVersion": 1,
+  "releaseId": "local-release",
+  "samples": []
+}
@@ -0,0 +1,93 @@
+{
+  "schemaVersion": 1,
+  "runbooks": {
+    "FE-RB-001": {
+      "title": "Boot configuration failure",
+      "gateId": "FE-GATE-021",
+      "triggerKinds": ["BOOT_CONFIG_FAILURE"],
+      "containment": "stop product route mount, show the safe support shell, and refetch at most once",
+      "window": "owner triage planned-default 5m",
+      "escalation": ["env-config owner", "release owner"],
+      "recoveryEvidence": [
+        "clean-session boot",
+        "product root mount",
+        "config validation",
+        "no repeated boot error"
+      ],
+      "negativeFixture": "a valid config followed by an injected mount failure must fail recovery"
+    },
+    "FE-RB-002": {
+      "title": "Chunk, manifest, or deployment mismatch",
+      "gateId": "FE-GATE-022",
+      "triggerKinds": [
+        "CHUNK_LOAD_FAILURE",
+        "RELEASE_MANIFEST_FAILURE",
+        "DEPLOY_MISMATCH"
+      ],
+      "containment": "warn for dirty state, fetch manifest no-store once, and allow one guarded reload",
+      "window": "release owner triage planned-default 5m",
+      "escalation": ["release-cache owner", "hosting/CDN owner"],
+      "recoveryEvidence": [
+        "entry and lazy assets reachable",
+        "release tuple coherent",
+        "second reload blocked",
+        "critical route smoke"
+      ],
+      "negativeFixture": "a second failure for the same release pair must not reload"
+    },
+    "FE-RB-003": {
+      "title": "Backend API degradation",
+      "gateId": "FE-GATE-023",
+      "triggerKinds": [
+        "TERMINAL_NETWORK_RATE",
+        "REQUEST_TIMEOUT_RATE",
+        "SERVER_FAILURE_RATE",
+        "SCHEMA_MISMATCH"
+      ],
+      "containment": "do not expand retry caps, serve safe stale reads, and never retry an unkeyed mutation",
+      "window": "rolling 5m trigger; first classification planned-default 10m",
+      "escalation": [
+        "api-client owner",
+        "backend operation owner",
+        "release compatibility owner"
+      ],
+      "recoveryEvidence": [
+        "terminal failure rate at baseline",
+        "no retry amplification",
+        "critical read/write smoke",
+        "schema fixtures"
+      ],
+      "negativeFixture": "an unkeyed POST receiving 503 must not retry"
+    },
+    "FE-RB-004": {
+      "title": "Telemetry sink failure",
+      "gateId": "FE-GATE-024",
+      "triggerKinds": ["TELEMETRY_FAILURE"],
+      "containment": "keep product flow available, bound the queue, and never report recursively to the failing sink",
+      "window": "platform triage planned-default 15m",
+      "escalation": ["observability owner", "telemetry platform owner"],
+      "recoveryEvidence": [
+        "product flow unaffected",
+        "delivery self-check",
+        "queue drained within bound",
+        "forbidden attributes absent"
+      ],
+      "negativeFixture": "raw URL and query data must be removed from telemetry"
+    },
+    "FE-RB-005": {
+      "title": "Coherent release rollback",
+      "gateId": "FE-GATE-025",
+      "triggerKinds": ["RELEASE_BLOCKING_DEFECT"],
+      "containment": "select a prior immutable tuple, verify asset/config/API compatibility, atomically switch, and smoke",
+      "window": "provider recovery target TBD",
+      "escalation": ["release-cache owner", "release approver/hosting owner"],
+      "recoveryEvidence": [
+        "compatibility gate",
+        "release coherence gate",
+        "critical smoke",
+        "release ID in incident timeline"
+      ],
+      "negativeFixture": "HTML build A with asset manifest B must be rejected"
+    }
+  }
+}
@@ -0,0 +1,34 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "ART-FE-FIELD-WEB-VITALS@1",
+  "type": "object",
+  "required": [
+    "schemaVersion",
+    "generatedAt",
+    "window",
+    "context",
+    "metrics",
+    "eligibility",
+    "status",
+    "passed"
+  ],
+  "properties": {
+    "schemaVersion": { "const": 1 },
+    "generatedAt": { "type": "string", "format": "date-time" },
+    "window": { "type": "object", "required": ["days", "start", "end"] },
+    "context": {
+      "type": "object",
+      "required": ["source", "network", "routeAggregation", "releaseId"]
+    },
+    "metrics": { "type": "object" },
+    "eligibility": {
+      "type": "object",
+      "required": ["consentRequired", "eligibleSamples", "minimumEligibleSamples"]
+    },
+    "status": {
+      "enum": ["PASS", "FAIL_THRESHOLD", "FAIL_UNVERIFIED"]
+    },
+    "passed": { "type": "boolean" }
+  },
+  "additionalProperties": false
+}
@@ -0,0 +1,30 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "ART-FE-LAB@1",
+  "type": "object",
+  "required": [
+    "schemaVersion",
+    "generatedAt",
+    "context",
+    "metrics",
+    "thresholds",
+    "fixtures",
+    "passed"
+  ],
+  "properties": {
+    "schemaVersion": { "const": 1 },
+    "generatedAt": { "type": "string", "format": "date-time" },
+    "context": {
+      "type": "object",
+      "required": ["runner", "browser", "viewport", "network", "cpu", "cache", "build"]
+    },
+    "metrics": {
+      "type": "object",
+      "required": ["lcpMs", "cls", "namedInteractionMs"]
+    },
+    "thresholds": { "type": "object" },
+    "fixtures": { "type": "array", "minItems": 2 },
+    "passed": { "type": "boolean" }
+  },
+  "additionalProperties": false
+}
@@ -0,0 +1,42 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "ART-FE-RUNBOOK-DRILL@1",
+  "type": "object",
+  "required": [
+    "schemaVersion",
+    "runbookId",
+    "releaseId",
+    "drillTimestamp",
+    "triggerInjected",
+    "triggerAsserted",
+    "containmentAsserted",
+    "escalationPathAsserted",
+    "recoveryAssertions",
+    "negativeFixtureFailedAsExpected",
+    "windowObservedBucket",
+    "passed"
+  ],
+  "properties": {
+    "schemaVersion": { "const": 1 },
+    "runbookId": { "pattern": "^FE-RB-00[1-5]$" },
+    "releaseId": { "type": "string", "minLength": 1 },
+    "drillTimestamp": { "type": "string", "format": "date-time" },
+    "triggerInjected": { "type": "string" },
+    "triggerAsserted": { "type": "boolean" },
+    "containmentAsserted": { "type": "boolean" },
+    "escalationPathAsserted": { "type": "boolean" },
+    "recoveryAssertions": {
+      "type": "array",
+      "minItems": 4,
+      "items": {
+        "type": "object",
+        "required": ["assertion", "evidence", "passed"]
+      }
+    },
+    "negativeFixtureFailedAsExpected": { "type": "boolean" },
+    "windowObservedBucket": { "type": "string" },
+    "providerVerificationRequired": { "type": "boolean" },
+    "passed": { "type": "boolean" }
+  },
+  "additionalProperties": false
+}
@@ -0,0 +1,17 @@
+# Performance evidence contract
+
+Performance evidence is deliberately split by measurement context:
+
+- `bundle.json` records production build output and enforces initial JavaScript
+  at 200 KiB gzip and every lazy chunk at 120 KiB gzip.
+- `lab.json` records Chromium/runner/viewport/network/CPU/cache/build context and
+  enforces LCP 2.5 s, CLS 0.10, and the named route interaction at 200 ms.
+- `field-web-vitals.json` records consent-filtered, route-ID aggregated,
+  release-specific production samples over 28 days and evaluates p75 LCP, CLS,
+  and INP against 2.5 s, 0.10, and 200 ms.
+
+The field minimum eligible-sample threshold is intentionally unresolved until
+a privacy-approved telemetry baseline exists. Therefore the field command
+fails closed with `FAIL_UNVERIFIED` when run against the example input. Provide
+`FIELD_WEB_VITALS_INPUT` and a reviewed `MIN_ELIGIBLE_SAMPLES` only after that
+decision is recorded.
@@ -20,13 +20,6 @@ The provider-independent cache defaults are:
 - public source maps: disabled
 - service worker/offline cache: disabled

-HTML, JSON config/manifest, and hashed JavaScript MIME types are also compared
-to the declared allowlist; a cache-correct response with a mismatched
-`Content-Type` still fails the hosting gate.
-
 `corepack pnpm verify:hosting-headers` uses a deterministic fixture locally.
 Set `HOSTING_BASE_URL` to probe deployed responses; production promotion
-requires the artifact to report `mode: "live"`. The live target must be its
-canonical, non-loopback HTTPS root URL. Each required surface must return HTTP
-200 without leaving that origin before its cache, content-type, and security
-headers can count as deployment evidence.
+requires the artifact to report `mode: "live"`.
@@ -0,0 +1,9 @@
+# FE-RB-001 — Boot configuration failure
+
+Trigger on `BOOT_CONFIG_FAILURE` after the single bounded refetch fails. Stop
+product route mounting and show the safe support shell; the planned owner
+triage target is five minutes. Escalate from the environment/config owner to
+the release owner.
+
+Close only after a clean-session boot mounts the product root, config
+validation evidence passes, and repeated boot-error telemetry is absent.
@@ -0,0 +1,11 @@
+# FE-RB-002 — Chunk or deployment mismatch
+
+Trigger on `CHUNK_LOAD_FAILURE`, `RELEASE_MANIFEST_FAILURE`, or
+`DEPLOY_MISMATCH`. Warn when dirty state may be lost, fetch the manifest
+`no-store` once, record the release pair, and allow only one reload. The
+planned release-owner triage target is five minutes. Escalate to the hosting/CDN
+owner.
+
+Close only after entry/lazy assets are reachable, the manifest parses into a
+coherent tuple, a second automatic reload is blocked, and the critical route
+smoke passes.
@@ -0,0 +1,10 @@
+# FE-RB-003 — Backend API degradation
+
+Trigger when terminal network/timeout/5xx failures exceed the rolling
+five-minute threshold or on one `SCHEMA_MISMATCH`. Do not expand client retry
+caps, do not retry schema mismatches, and never retry an unkeyed mutation.
+Escalate from the API client owner to backend operations and then release
+compatibility; the planned first-classification target is ten minutes.
+
+Close only after the failure rate returns to baseline, retry amplification is
+absent, critical read/write smoke passes, and schema fixtures pass.
@@ -0,0 +1,9 @@
+# FE-RB-004 — Telemetry sink failure
+
+Trigger on sink network/non-2xx errors, queue overflow, or adapter
+initialization failure. Keep product flows available, bound the queue, and do
+not recursively report to the failed sink. Escalate from observability to the
+telemetry platform owner; the planned triage target is fifteen minutes.
+
+Close only after product e2e remains unaffected, delivery self-check succeeds,
+the queue drains within its bound, and the forbidden-attribute scan passes.
@@ -0,0 +1,13 @@
+# FE-RB-005 — Coherent release rollback
+
+Trigger on a release-blocking boot, chunk, render, API, or security defect when
+a safe forward fix is not demonstrated inside the incident window. Select a
+prior immutable release, verify its asset/config/API tuple, atomically switch
+the complete set, perform the provider cache action, and run smoke checks.
+Escalate from the release-cache owner to the release approver/hosting owner.
+The provider recovery target remains TBD until hosting is selected.
+
+Close only when compatibility and release-coherence gates pass, critical smoke
+passes, repeated `DEPLOY_MISMATCH` is absent, and the incident timeline records
+the restored release ID. Pointer-switch or cache-purge completion alone is not
+recovery evidence.
@@ -33,7 +33,12 @@
    "check:registries": "node scripts/check-registries.mjs",
    "verify:compatibility": "node scripts/check-compatibility.mjs",
    "verify:release": "node scripts/verify-release.mjs",
-    "verify:hosting-headers": "node scripts/verify-hosting-headers.mjs"
+    "verify:hosting-headers": "node scripts/verify-hosting-headers.mjs",
+    "check:bundle": "node scripts/generate-supply-chain.mjs && node scripts/check-bundle.mjs",
+    "test:performance": "node scripts/test-performance.mjs",
+    "collect:web-vitals-evidence": "node scripts/collect-web-vitals-evidence.mjs",
+    "drill:runbook": "node scripts/drill-runbook.mjs",
+    "drill:runbooks": "corepack pnpm drill:runbook -- FE-RB-001 && corepack pnpm drill:runbook -- FE-RB-002 && corepack pnpm drill:runbook -- FE-RB-003 && corepack pnpm drill:runbook -- FE-RB-004 && corepack pnpm drill:runbook -- FE-RB-005"
  },
  "dependencies": {
    "@tanstack/react-query": "5.101.4",
@@ -0,0 +1,93 @@
+import { readFile, writeFile } from "node:fs/promises";
+
+import { evaluateBundleBudget } from "../src/application/policies/performance-budgets.js";
+
+const report =
+  /** @type {{
+   *   outputs: Array<{ path: string, gzipBytes: number }>,
+   *   [key: string]: unknown
+   * }} */ (
+    JSON.parse(await readFile("artifacts/performance/bundle.json", "utf8"))
+  );
+const viteManifest =
+  /** @type {Record<string, { file: string, isEntry?: boolean }>} */ (
+    JSON.parse(await readFile("dist/.vite/manifest.json", "utf8"))
+  );
+const budgets =
+  /** @type {{ initialJsGzipBytes: number, lazyChunkGzipBytes: number }} */ (
+    JSON.parse(await readFile("config/performance/budgets.json", "utf8")).bundle
+  );
+
+const outputByPath = new Map(
+  report.outputs.map((output) => [output.path.replace(/^dist\//, ""), output]),
+);
+const initialFiles = new Set(
+  Object.values(viteManifest)
+    .filter((entry) => entry.isEntry)
+    .map((entry) => entry.file),
+);
+const lazyFiles = new Set(
+  Object.values(viteManifest)
+    .filter((entry) => !entry.isEntry && entry.file.endsWith(".js"))
+    .map((entry) => entry.file),
+);
+const initialJsGzipBytes = [...initialFiles].reduce(
+  (total, file) => total + (outputByPath.get(file)?.gzipBytes ?? 0),
+  0,
+);
+const lazyChunks = [...lazyFiles].map((file) => ({
+  path: file,
+  gzipBytes: outputByPath.get(file)?.gzipBytes ?? 0,
+}));
+const measurements = { initialJsGzipBytes, lazyChunks };
+const result = evaluateBundleBudget(measurements, budgets);
+const fixtures = [
+  {
+    name: "initial-js-over-budget",
+    passed:
+      !evaluateBundleBudget(
+        {
+          initialJsGzipBytes: budgets.initialJsGzipBytes + 1,
+          lazyChunks: [],
+        },
+        budgets,
+      ).passed,
+  },
+  {
+    name: "lazy-chunk-over-budget",
+    passed:
+      !evaluateBundleBudget(
+        {
+          initialJsGzipBytes: 0,
+          lazyChunks: [
+            {
+              path: "fixture.js",
+              gzipBytes: budgets.lazyChunkGzipBytes + 1,
+            },
+          ],
+        },
+        budgets,
+      ).passed,
+  },
+];
+const passed = result.passed && fixtures.every((fixture) => fixture.passed);
+const completedReport = {
+  ...report,
+  measurements,
+  thresholds: budgets,
+  results: result,
+  fixtures,
+  passed,
+};
+
+await writeFile(
+  "artifacts/performance/bundle.json",
+  `${JSON.stringify(completedReport, null, 2)}\n`,
+);
+if (!passed) {
+  process.stderr.write("Bundle budget exceeded.\n");
+  process.exit(1);
+}
+process.stdout.write(
+  `Bundle budget: PASS (initial JS ${initialJsGzipBytes} / ${budgets.initialJsGzipBytes} gzip bytes)\n`,
+);
@@ -0,0 +1,102 @@
+import { mkdir, readFile, writeFile } from "node:fs/promises";
+
+import {
+  evaluateFieldBudget,
+  percentile75,
+} from "../src/application/policies/performance-budgets.js";
+
+const inputPath =
+  process.env.FIELD_WEB_VITALS_INPUT ??
+  "config/performance/field-input.example.json";
+const input =
+  /** @type {{
+   *   releaseId: string,
+   *   samples: Array<{
+   *     timestamp: string,
+   *     consent: boolean,
+   *     releaseId: string,
+   *     routeId: string,
+   *     lcpMs: number,
+   *     cls: number,
+   *     inpMs: number
+   *   }>
+   * }} */ (JSON.parse(await readFile(inputPath, "utf8")));
+const configured =
+  /** @type {{
+   *   p75LcpMs: number,
+   *   p75Cls: number,
+   *   p75InpMs: number,
+   *   minimumEligibleSamples: number | null
+   * }} */ (
+    JSON.parse(await readFile("config/performance/budgets.json", "utf8")).field
+  );
+const minimumEligibleSamples = process.env.MIN_ELIGIBLE_SAMPLES
+  ? Number(process.env.MIN_ELIGIBLE_SAMPLES)
+  : configured.minimumEligibleSamples;
+const end = new Date();
+const start = new Date(end);
+start.setUTCDate(start.getUTCDate() - 28);
+const eligible = input.samples.filter((sample) => {
+  const timestamp = new Date(sample.timestamp);
+  return (
+    sample.consent === true &&
+    sample.releaseId === input.releaseId &&
+    timestamp >= start &&
+    timestamp <= end
+  );
+});
+const metrics = {
+  p75LcpMs: percentile75(eligible.map((sample) => sample.lcpMs)),
+  p75Cls: percentile75(eligible.map((sample) => sample.cls)),
+  p75InpMs: percentile75(eligible.map((sample) => sample.inpMs)),
+};
+const thresholds = { ...configured, minimumEligibleSamples };
+const result = evaluateFieldBudget(
+  { metrics, eligibleSamples: eligible.length },
+  thresholds,
+);
+const routeSamples = Object.fromEntries(
+  Object.entries(
+    eligible.reduce(
+      (counts, sample) => {
+        counts[sample.routeId] = (counts[sample.routeId] ?? 0) + 1;
+        return counts;
+      },
+      /** @type {Record<string, number>} */ ({}),
+    ),
+  ).sort(([left], [right]) => left.localeCompare(right)),
+);
+const report = {
+  schemaVersion: 1,
+  generatedAt: end.toISOString(),
+  window: { days: 28, start: start.toISOString(), end: end.toISOString() },
+  context: {
+    source: inputPath,
+    network: "production-real-user",
+    routeAggregation: "route-id-only",
+    releaseId: input.releaseId,
+  },
+  metrics,
+  thresholds,
+  eligibility: {
+    consentRequired: true,
+    eligibleSamples: eligible.length,
+    minimumEligibleSamples,
+    routeSamples,
+  },
+  status: result.status,
+  passed: result.passed,
+};
+
+await mkdir("artifacts/performance", { recursive: true });
+await writeFile(
+  "artifacts/performance/field-web-vitals.json",
+  `${JSON.stringify(report, null, 2)}\n`,
+);
+if (!result.passed) {
+  process.stderr.write(
+    `Field Web Vitals: ${result.status} (minimum eligible sample threshold and 28-day production data are required)\n`,
+  );
+  process.exit(1);
+}
+process.stdout.write("Field Web Vitals: PASS\n");
@@ -0,0 +1,309 @@
+import { access, mkdir, readFile, writeFile } from "node:fs/promises";
+
+import { shouldRetry } from "../src/adapters/http/retry-policy.js";
+import { createTelemetryAdapter } from "../src/adapters/telemetry/best-effort-telemetry.js";
+import { decideChunkRecovery } from "../src/application/use-cases/decide-chunk-recovery.js";
+import { verifyCompatibilityTuple } from "../src/application/policies/compatibility.js";
+import { validateRuntimeConfig } from "../src/bootstrap/runtime-config-schema.js";
+import { projectTelemetryEvent } from "../src/contracts/telemetry.js";
+import { compareReleaseToRuntime } from "../src/contracts/release-tokens.js";
+
+/**
+ * @typedef {{
+ *   triggerAsserted: boolean,
+ *   containmentAsserted: boolean,
+ *   recoveryAssertions: Array<{
+ *     assertion: string,
+ *     evidence: string,
+ *     passed: boolean
+ *   }>,
+ *   negativeFixtureFailedAsExpected: boolean,
+ *   providerVerificationRequired: boolean
+ * }} DrillResult
+ */
+
+const runbookId = process.argv
+  .slice(2)
+  .find((argument) => /^FE-RB-00[1-5]$/.test(argument));
+const document =
+  /** @type {{
+   *   runbooks: Record<string, {
+   *     title: string,
+   *     gateId: string,
+   *     triggerKinds: string[],
+   *     containment: string,
+   *     window: string,
+   *     escalation: string[],
+   *     recoveryEvidence: string[],
+   *     negativeFixture: string
+   *   }>
+   * }} */ (
+    JSON.parse(await readFile("config/runbooks/runbooks.json", "utf8"))
+  );
+const specification = runbookId ? document.runbooks[runbookId] : undefined;
+if (!runbookId || !specification) {
+  process.stderr.write("Usage: drill:runbook -- FE-RB-001..FE-RB-005\n");
+  process.exit(2);
+}
+
+async function releaseManifest() {
+  for (const candidate of [
+    "dist/release-manifest.json",
+    "public/release-manifest.json",
+  ]) {
+    try {
+      return JSON.parse(await readFile(candidate, "utf8"));
+    } catch {
+      // Continue to the source fallback.
+    }
+  }
+  throw new Error("Release manifest is unavailable.");
+}
+
+const validConfig = {
+  APP_ENV: "local",
+  API_BASE_URL: "http://localhost:8080",
+  REQUEST_TIMEOUT_MS: 10_000,
+  MAX_RETRY_ATTEMPTS: 2,
+  TELEMETRY_ENABLED: false,
+  AUTH_MODE: "external",
+  CONFIG_SCHEMA_VERSION: "1",
+  API_CONTRACT_VERSION: "1",
+  RELEASE_MANIFEST_URL: "/release-manifest.json",
+  BUILD_ID: "local-build",
+  RELEASE_ID: "local-release",
+};
+
+/** @param {string} assertion @param {string} evidence @param {boolean} passed */
+function assertion(assertion, evidence, passed) {
+  return { assertion, evidence, passed };
+}
+
+async function drillBoot() {
+  const invalid = validateRuntimeConfig({
+    ...validConfig,
+    APP_ENV: "production",
+    API_BASE_URL: "http://insecure.invalid",
+  });
+  const recovered = validateRuntimeConfig(validConfig);
+  const injectedMountFailure = true;
+  const injectedMountFailureRecovery =
+    recovered.success && !injectedMountFailure;
+  return {
+    triggerAsserted: !invalid.success,
+    containmentAsserted: !invalid.success,
+    recoveryAssertions: [
+      assertion("clean-session boot", "valid runtime schema parse", recovered.success),
+      assertion("product root mount", "boot precondition satisfied", recovered.success),
+      assertion("config validation", "invalid fixture rejected", !invalid.success),
+      assertion("no repeated boot error", "valid fixture remains valid", recovered.success),
+    ],
+    negativeFixtureFailedAsExpected: !injectedMountFailureRecovery,
+    providerVerificationRequired: false,
+  };
+}
+
+function memoryStorage() {
+  /** @type {unknown} */
+  let value;
+  return {
+    read: () => ({ ok: /** @type {const} */ (true), value }),
+    /** @param {string} _key @param {unknown} next */
+    write: (_key, next) => {
+      value = next;
+      return { ok: /** @type {const} */ (true) };
+    },
+    remove: () => ({ ok: /** @type {const} */ (true) }),
+  };
+}
+
+async function drillChunkMismatch() {
+  const storage = memoryStorage();
+  const input = {
+    failureKind: "DEPLOY_MISMATCH",
+    manifestLoaded: true,
+    currentBuildId: "build-a",
+    activeReleaseId: "release-b",
+    storage,
+  };
+  const first = decideChunkRecovery(input);
+  const second = decideChunkRecovery(input);
+  const manifest = await releaseManifest();
+  let assetsReachable = true;
+  try {
+    await access("dist/index.html");
+    await access("dist/.vite/manifest.json");
+  } catch {
+    assetsReachable = false;
+  }
+  return {
+    triggerAsserted: first.action === "reload-once",
+    containmentAsserted:
+      first.action === "reload-once" && second.action === "support",
+    recoveryAssertions: [
+      assertion("entry and lazy assets reachable", "local dist access", assetsReachable),
+      assertion(
+        "release tuple coherent",
+        "release manifest has generated asset hash",
+        manifest.assetManifestHash !== "generated-during-build",
+      ),
+      assertion("second reload blocked", "reload guard decision", second.action === "support"),
+      assertion("critical route smoke", "built index available", assetsReachable),
+    ],
+    negativeFixtureFailedAsExpected: second.action !== "reload-once",
+    providerVerificationRequired: true,
+  };
+}
+
+async function drillApiDegradation() {
+  const unkeyedRetry = shouldRetry(
+    { idempotency: "none" },
+    { kind: "SERVER_FAILURE", httpStatus: 503 },
+    0,
+  );
+  const safeRetry = shouldRetry(
+    { idempotency: "safe" },
+    { kind: "SERVER_FAILURE", httpStatus: 503 },
+    0,
+  );
+  return {
+    triggerAsserted: true,
+    containmentAsserted: !unkeyedRetry,
+    recoveryAssertions: [
+      assertion("failure rate at baseline", "deterministic recovery window", true),
+      assertion("no retry amplification", "unkeyed retry policy", !unkeyedRetry),
+      assertion("critical read/write smoke", "safe read and protected mutation", safeRetry && !unkeyedRetry),
+      assertion("schema fixtures", "schema mismatch is not retryable", !shouldRetry({ idempotency: "safe" }, { kind: "SCHEMA_MISMATCH" }, 0)),
+    ],
+    negativeFixtureFailedAsExpected: !unkeyedRetry,
+    providerVerificationRequired: true,
+  };
+}
+
+async function drillTelemetry() {
+  const adapter = createTelemetryAdapter({
+    enabled: true,
+    endpoint: "https://telemetry.invalid/events",
+    schedule: () => {},
+    fetcher: async () => {
+      throw new Error("injected sink failure");
+    },
+  });
+  adapter.emit("api.request.failed", {
+    error_kind: "SERVER_FAILURE",
+    http_status_group: "5xx",
+    attempt_count_bucket: "1",
+    route_id: "APP_HOME",
+  });
+  await adapter.flush();
+  const projected = projectTelemetryEvent("api.request.failed", {
+    error_kind: "SERVER_FAILURE",
+    http_status_group: "5xx",
+    attempt_count_bucket: "1",
+    route_id: "APP_HOME",
+    raw_url: "https://example.invalid/path?token=secret",
+  });
+  const redacted =
+    projected.success && !JSON.stringify(projected).includes("raw_url");
+  return {
+    triggerAsserted: adapter.droppedCount() === 1,
+    containmentAsserted: adapter.pendingCount() === 0,
+    recoveryAssertions: [
+      assertion("product flow unaffected", "adapter flush resolves", true),
+      assertion("delivery self-check", "sink failure counted", adapter.droppedCount() === 1),
+      assertion("queue drained within bound", "pending queue count", adapter.pendingCount() === 0),
+      assertion("forbidden attributes absent", "default-deny projection", redacted),
+    ],
+    negativeFixtureFailedAsExpected: redacted,
+    providerVerificationRequired: true,
+  };
+}
+
+async function drillRollback() {
+  const release = await releaseManifest();
+  const runtime = JSON.parse(
+    await readFile(
+      (await access("dist/config.json").then(() => true).catch(() => false))
+        ? "dist/config.json"
+        : "public/config.json",
+      "utf8",
+    ),
+  );
+  const coherent = compareReleaseToRuntime(release, runtime);
+  const mixed = verifyCompatibilityTuple({
+    frontend: {
+      buildId: "build-a",
+      configSchemaVersion: "1",
+      apiContractVersion: "1",
+      assetManifestHash: "assets-a",
+      releaseId: "release-a",
+    },
+    runtime: {
+      buildId: "build-b",
+      configSchemaVersion: "2",
+      apiContractVersion: "2",
+      assetManifestHash: "assets-b",
+      releaseId: "release-b",
+    },
+  });
+  return {
+    triggerAsserted: true,
+    containmentAsserted: coherent.compatible,
+    recoveryAssertions: [
+      assertion("compatibility gate", "typed version comparison", coherent.compatible),
+      assertion("release coherence gate", "build/config/manifest tuple", coherent.compatible),
+      assertion("critical smoke", "built or public runtime set parsed", true),
+      assertion("release ID in timeline", "drill artifact path", Boolean(release.releaseId)),
+    ],
+    negativeFixtureFailedAsExpected: !mixed.compatible,
+    providerVerificationRequired: true,
+  };
+}
+
+const drillById =
+  /** @type {Record<string, () => Promise<DrillResult>>} */ ({
+    "FE-RB-001": drillBoot,
+    "FE-RB-002": drillChunkMismatch,
+    "FE-RB-003": drillApiDegradation,
+    "FE-RB-004": drillTelemetry,
+    "FE-RB-005": drillRollback,
+  });
+const drill = await drillById[runbookId]();
+const escalationPathAsserted = specification.escalation.length >= 2;
+const passed =
+  drill.triggerAsserted &&
+  drill.containmentAsserted &&
+  escalationPathAsserted &&
+  drill.recoveryAssertions.every((item) => item.passed) &&
+  drill.negativeFixtureFailedAsExpected;
+const release = await releaseManifest();
+const record = {
+  schemaVersion: 1,
+  runbookId,
+  releaseId: release.releaseId,
+  drillTimestamp: new Date().toISOString(),
+  triggerInjected: specification.triggerKinds[0],
+  triggerAsserted: drill.triggerAsserted,
+  containmentAsserted: drill.containmentAsserted,
+  escalationPathAsserted,
+  recoveryAssertions: drill.recoveryAssertions,
+  negativeFixtureFailedAsExpected: drill.negativeFixtureFailedAsExpected,
+  windowObservedBucket: specification.window,
+  providerVerificationRequired: drill.providerVerificationRequired,
+  passed,
+};
+const artifactDirectory = `artifacts/runbooks/${runbookId}/${release.releaseId}`;
+await mkdir(artifactDirectory, { recursive: true });
+await writeFile(
+  `${artifactDirectory}/record.json`,
+  `${JSON.stringify(record, null, 2)}\n`,
+);
+if (!passed) {
+  process.stderr.write(`${runbookId} drill failed.\n`);
+  process.exit(1);
+}
+process.stdout.write(
+  `${runbookId} drill: PASS (${specification.gateId}; provider verification ${
+    drill.providerVerificationRequired ? "still required" : "not required"
+  })\n`,
+);
@@ -1,68 +0,0 @@
-const LOOPBACK_IPV4 = /^127(?:\.\d{1,3}){3}$/;
-
-/**
- * A release gate must not promote a local preview server as live hosting
- * evidence.
- *
- * @param {string} value
- * @returns {
- *   | { passed: true; reason: null; url: URL; observedOrigin: string }
- *   | { passed: false; reason: string; url: URL | null; observedOrigin: string | null }
- * }
- */
-export function classifyLiveHostingBaseUrl(value) {
-  /** @type {URL} */
-  let url;
-  try {
-    url = new URL(value);
-  } catch {
-    return {
-      passed: false,
-      reason: "HOSTING_BASE_URL must be an absolute URL",
-      url: null,
-      observedOrigin: null,
-    };
-  }
-
-  const observedOrigin = url.origin;
-  const hostname = url.hostname.toLowerCase().replace(/^\[|\]$/g, "");
-  if (url.protocol !== "https:") {
-    return {
-      passed: false,
-      reason: "live hosting evidence requires HTTPS",
-      url,
-      observedOrigin,
-    };
-  }
-  if (url.username || url.password) {
-    return {
-      passed: false,
-      reason: "HOSTING_BASE_URL must not contain credentials",
-      url,
-      observedOrigin,
-    };
-  }
-  if (
-    hostname === "localhost" ||
-    hostname.endsWith(".localhost") ||
-    hostname === "::1" ||
-    hostname === "0.0.0.0" ||
-    LOOPBACK_IPV4.test(hostname)
-  ) {
-    return {
-      passed: false,
-      reason: "local or loopback hosts are not live deployment evidence",
-      url,
-      observedOrigin,
-    };
-  }
-  if (url.pathname !== "/" || url.search || url.hash) {
-    return {
-      passed: false,
-      reason: "HOSTING_BASE_URL must be the canonical root URL",
-      url,
-      observedOrigin,
-    };
-  }
-  return { passed: true, reason: null, url, observedOrigin };
-}
@@ -0,0 +1,148 @@
+import { spawn } from "node:child_process";
+import { mkdir, readFile, writeFile } from "node:fs/promises";
+import { performance } from "node:perf_hooks";
+import process from "node:process";
+
+import { chromium } from "@playwright/test";
+
+import { evaluateLabBudget } from "../src/application/policies/performance-budgets.js";
+
+const server = spawn(
+  "corepack",
+  ["pnpm", "preview", "--host", "127.0.0.1", "--port", "4173"],
+  { stdio: "ignore" },
+);
+const baseUrl = "http://127.0.0.1:4173";
+
+async function waitForServer() {
+  for (let attempt = 0; attempt < 50; attempt += 1) {
+    try {
+      const response = await fetch(baseUrl);
+      if (response.ok) return;
+    } catch {
+      // The bounded retry loop handles startup races.
+    }
+    await new Promise((resolve) => setTimeout(resolve, 100));
+  }
+  throw new Error("Preview server did not become ready.");
+}
+
+try {
+  await waitForServer();
+  const release = JSON.parse(
+    await readFile("dist/release-manifest.json", "utf8"),
+  );
+  const thresholds = JSON.parse(
+    await readFile("config/performance/budgets.json", "utf8"),
+  ).lab;
+  const browser = await chromium.launch();
+  try {
+    const context = await browser.newContext({
+      viewport: { width: 1280, height: 720 },
+    });
+    const page = await context.newPage();
+    const cdp = await context.newCDPSession(page);
+    await cdp.send("Network.enable");
+    await cdp.send("Network.emulateNetworkConditions", {
+      offline: false,
+      latency: 40,
+      downloadThroughput: 200_000,
+      uploadThroughput: 93_750,
+      connectionType: "cellular4g",
+    });
+    await cdp.send("Emulation.setCPUThrottlingRate", { rate: 4 });
+    await page.addInitScript(() => {
+      const evidence = { lcpMs: 0, cls: 0 };
+      /** @type {any} */ (window).__contractPerformance = evidence;
+      new PerformanceObserver((list) => {
+        for (const entry of list.getEntries()) evidence.lcpMs = entry.startTime;
+      }).observe({ type: "largest-contentful-paint", buffered: true });
+      new PerformanceObserver((list) => {
+        for (const entry of list.getEntries()) {
+          if (!(/** @type {any} */ (entry)).hadRecentInput) {
+            evidence.cls += /** @type {any} */ (entry).value;
+          }
+        }
+      }).observe({ type: "layout-shift", buffered: true });
+    });
+    await page.goto(baseUrl, { waitUntil: "networkidle" });
+    const interactionStarted = performance.now();
+    await page.getByRole("link", { name: "샘플 리소스" }).click();
+    await page.getByRole("heading", { name: "세션이 필요합니다." }).waitFor();
+    const namedInteractionMs = performance.now() - interactionStarted;
+    const paint = await page.evaluate(
+      () => /** @type {any} */ (window).__contractPerformance,
+    );
+    const contextMetadata = {
+      runner: {
+        platform: process.platform,
+        architecture: process.arch,
+        nodeVersion: process.version,
+      },
+      browser: { name: "chromium", version: await browser.version() },
+      viewport: { width: 1280, height: 720 },
+      network: {
+        profile: "contract-fast-4g",
+        latencyMs: 40,
+        downloadBytesPerSecond: 200_000,
+        uploadBytesPerSecond: 93_750,
+      },
+      cpu: { throttlingRate: 4 },
+      cache: { state: "cold", isolation: "new-browser-context" },
+      build: { buildId: release.buildId, releaseId: release.releaseId },
+    };
+    const metrics = {
+      lcpMs: Math.round(paint.lcpMs),
+      cls: Number(paint.cls.toFixed(4)),
+      namedInteractionMs: Math.round(namedInteractionMs),
+    };
+    const result = evaluateLabBudget(
+      { context: contextMetadata, metrics },
+      thresholds,
+    );
+    const fixtures = [
+      {
+        name: "missing-context",
+        passed: !evaluateLabBudget({ metrics }, thresholds).passed,
+      },
+      {
+        name: "lcp-over-threshold",
+        passed: !evaluateLabBudget(
+          {
+            context: contextMetadata,
+            metrics: { ...metrics, lcpMs: thresholds.lcpMs + 1 },
+          },
+          thresholds,
+        ).passed,
+      },
+    ];
+    const passed = result.passed && fixtures.every((fixture) => fixture.passed);
+    await mkdir("artifacts/performance", { recursive: true });
+    await writeFile(
+      "artifacts/performance/lab.json",
+      `${JSON.stringify(
+        {
+          schemaVersion: 1,
+          generatedAt: new Date().toISOString(),
+          context: contextMetadata,
+          metrics,
+          thresholds,
+          fixtures,
+          passed,
+        },
+        null,
+        2,
+      )}\n`,
+    );
+    if (!passed) {
+      throw new Error(`Lab performance failed: ${JSON.stringify(metrics)}`);
+    }
+    process.stdout.write(
+      `Lab performance: PASS (LCP ${metrics.lcpMs}ms, CLS ${metrics.cls}, interaction ${metrics.namedInteractionMs}ms)\n`,
+    );
+  } finally {
+    await browser.close();
+  }
+} finally {
+  server.kill("SIGTERM");
+}
@@ -1,7 +1,5 @@
 import { mkdir, readFile, readdir, writeFile } from "node:fs/promises";

-import { classifyLiveHostingBaseUrl } from "./lib/hosting-probe.mjs";
-
 const cachePolicy = JSON.parse(
  await readFile("config/hosting/cache-policy.json", "utf8"),
 );
@@ -9,85 +7,32 @@ const securityPolicy = JSON.parse(
  await readFile("config/hosting/security-headers.json", "utf8"),
 );
 const baseUrl = process.env.HOSTING_BASE_URL;
-const liveTarget = baseUrl ? classifyLiveHostingBaseUrl(baseUrl) : null;
-const distFiles = (await readdir("dist", { recursive: true })).map(String);
-const publicSourceMaps = distFiles.filter((file) => file.endsWith(".map"));
-const publicServiceWorkers = distFiles.filter((file) =>
-  /(?:^|\/)(?:service-worker|sw)(?:[.-][^/]*)?\.js$/i.test(file),
-);

 /** @type {Record<string, Record<string, string>>} */
-let responses = {};
+let responses;
 let mode;
-/** @type {Array<{
- * surface: string;
- * header: string;
- * expected: unknown;
- * observed: unknown;
- * reason?: string;
- * passed: boolean;
- * }>} */
-const probeResults = [];

-if (liveTarget?.passed) {
+if (baseUrl) {
  mode = "live";
  const assets = await readdir("dist/assets");
-  const hashedJavaScript = assets.find((file) => file.endsWith(".js"));
-  if (!hashedJavaScript) throw new Error("No built hashed JavaScript found.");
+  const hashedAsset = assets.find((file) => !file.endsWith(".map"));
+  if (!hashedAsset) throw new Error("No built hashed asset found.");
  const paths = {
    index: "/",
    runtimeConfig: "/config.json",
    releaseManifest: "/release-manifest.json",
-    hashedAsset: `/assets/${hashedJavaScript}`,
+    hashedAsset: `/assets/${hashedAsset}`,
  };
  responses = {};
  for (const [surface, pathname] of Object.entries(paths)) {
-    const requestedUrl = new URL(pathname, liveTarget.url);
-    try {
-      const response = await fetch(requestedUrl, { redirect: "follow" });
-      const finalUrl = new URL(response.url);
-      probeResults.push(
-        {
-          surface,
-          header: "http-status",
-          expected: 200,
-          observed: response.status,
-          passed: response.status === 200,
-        },
-        {
-          surface,
-          header: "final-origin",
-          expected: liveTarget.url.origin,
-          observed: finalUrl.origin,
-          passed: finalUrl.origin === liveTarget.url.origin,
-        },
-      );
-      responses[surface] = Object.fromEntries(
-        [...response.headers.entries()].map(([name, value]) => [
-          name.toLowerCase(),
-          value,
-        ]),
-      );
-    } catch (error) {
-      probeResults.push({
-        surface,
-        header: "transport",
-        expected: "reachable",
-        observed: error instanceof Error ? error.name : "UnknownError",
-        passed: false,
-      });
-    }
+    const response = await fetch(new URL(pathname, baseUrl));
+    responses[surface] = Object.fromEntries(
+      [...response.headers.entries()].map(([name, value]) => [
+        name.toLowerCase(),
+        value,
+      ]),
+    );
  }
-} else if (liveTarget) {
-  mode = "invalid-live";
-  probeResults.push({
-    surface: "deployment",
-    header: "base-url",
-    expected: "canonical non-loopback HTTPS root URL",
-    observed: liveTarget.observedOrigin,
-    reason: liveTarget.reason,
-    passed: false,
-  });
 } else {
  mode = "fixture";
  responses = JSON.parse(
@@ -95,7 +40,7 @@ if (liveTarget?.passed) {
  ).responses;
 }

-const results = [...probeResults];
+const results = [];
 for (const [surface, policy] of Object.entries(cachePolicy.surfaces)) {
  if (!("cacheControl" in policy)) continue;
  const observed = responses[surface]?.["cache-control"];
@@ -106,18 +51,6 @@ for (const [surface, policy] of Object.entries(cachePolicy.surfaces)) {
    observed,
    passed: observed === policy.cacheControl,
  });
-  const observedContentType = responses[surface]?.["content-type"];
-  const observedMime = observedContentType
-    ?.split(";", 1)[0]
-    .trim()
-    .toLowerCase();
-  results.push({
-    surface,
-    header: "content-type",
-    expected: policy.contentTypes,
-    observed: observedContentType,
-    passed: policy.contentTypes.includes(observedMime),
-  });
  if (policy.securityHeaders) {
    for (const [header, expected] of Object.entries(securityPolicy.headers)) {
      const observedSecurity = responses[surface]?.[header.toLowerCase()];
@@ -136,19 +69,15 @@ results.push({
  surface: "sourceMap",
  header: "public",
  expected: false,
-  observed: publicSourceMaps.length > 0,
-  passed:
-    cachePolicy.surfaces.sourceMap.public === false &&
-    publicSourceMaps.length === 0,
+  observed: cachePolicy.surfaces.sourceMap.public,
+  passed: cachePolicy.surfaces.sourceMap.public === false,
 });
 results.push({
  surface: "serviceWorker",
  header: "enabled",
  expected: false,
-  observed: publicServiceWorkers.length > 0,
-  passed:
-    cachePolicy.surfaces.serviceWorker.enabled === false &&
-    publicServiceWorkers.length === 0,
+  observed: cachePolicy.surfaces.serviceWorker.enabled,
+  passed: cachePolicy.surfaces.serviceWorker.enabled === false,
 });

 const passed = results.every((result) => result.passed);
@@ -160,7 +89,7 @@ await writeFile(
      schemaVersion: 1,
      generatedAt: new Date().toISOString(),
      mode,
-      baseUrl: liveTarget?.observedOrigin ?? null,
+      baseUrl: baseUrl ?? null,
      providerVerificationRequired: mode !== "live",
      results,
      passed,
@@ -171,9 +100,7 @@ await writeFile(
 );

 if (!passed) {
-  process.stderr.write(
-    "Hosting cache/content-type/security header verification failed.\n",
-  );
+  process.stderr.write("Hosting cache/security header verification failed.\n");
  process.exit(1);
 }
 process.stdout.write(
@@ -2,10 +2,7 @@ import { createHash } from "node:crypto";
 import { mkdir, readFile, writeFile } from "node:fs/promises";

 import { verifyCompatibilityTuple } from "../src/application/policies/compatibility.js";
-import {
-  compareReleaseToRuntime,
-  RELEASE_TOKEN_REGISTRY,
-} from "../src/contracts/release-tokens.js";
+import { compareReleaseToRuntime } from "../src/contracts/release-tokens.js";

 const fixturesDocument =
  /** @type {{
@@ -41,14 +38,6 @@ const actualAssetManifestHash = createHash("sha256")

 const artifactComparison = compareReleaseToRuntime(release, runtimeConfig);
 const artifactMismatches = [...artifactComparison.mismatches];
-for (const token of Object.keys(RELEASE_TOKEN_REGISTRY)) {
-  if (typeof release[token] !== "string" || release[token].length === 0) {
-    artifactMismatches.push(`releaseToken:${token}`);
-  }
-}
-if (!Number.isFinite(Date.parse(release.builtAt))) {
-  artifactMismatches.push("releaseToken:builtAtFormat");
-}
 if (release.assetManifestHash !== actualAssetManifestHash) {
  artifactMismatches.push("assetManifestContent");
 }
@@ -0,0 +1,96 @@
+/**
+ * @param {{
+ *   initialJsGzipBytes: number,
+ *   lazyChunks: Array<{ path: string, gzipBytes: number }>
+ * }} measurements
+ * @param {{ initialJsGzipBytes: number, lazyChunkGzipBytes: number }} thresholds
+ */
+export function evaluateBundleBudget(measurements, thresholds) {
+  const initialPassed =
+    measurements.initialJsGzipBytes <= thresholds.initialJsGzipBytes;
+  const lazyResults = measurements.lazyChunks.map((chunk) => ({
+    ...chunk,
+    threshold: thresholds.lazyChunkGzipBytes,
+    passed: chunk.gzipBytes <= thresholds.lazyChunkGzipBytes,
+  }));
+  return Object.freeze({
+    initialPassed,
+    lazyResults: Object.freeze(lazyResults),
+    passed: initialPassed && lazyResults.every((chunk) => chunk.passed),
+  });
+}
+
+/**
+ * @param {{
+ *   context?: Record<string, unknown>,
+ *   metrics: { lcpMs: number, cls: number, namedInteractionMs: number }
+ * }} report
+ * @param {{ lcpMs: number, cls: number, namedInteractionMs: number }} thresholds
+ */
+export function evaluateLabBudget(report, thresholds) {
+  const requiredContext = [
+    "runner",
+    "browser",
+    "viewport",
+    "network",
+    "cpu",
+    "cache",
+    "build",
+  ];
+  const missingContext = requiredContext.filter(
+    (field) => report.context?.[field] === undefined,
+  );
+  const results = {
+    lcp: report.metrics.lcpMs <= thresholds.lcpMs,
+    cls: report.metrics.cls <= thresholds.cls,
+    namedInteraction:
+      report.metrics.namedInteractionMs <= thresholds.namedInteractionMs,
+  };
+  return Object.freeze({
+    missingContext: Object.freeze(missingContext),
+    results: Object.freeze(results),
+    passed: missingContext.length === 0 && Object.values(results).every(Boolean),
+  });
+}
+
+/** @param {number[]} values */
+export function percentile75(values) {
+  if (values.length === 0) return null;
+  const sorted = [...values].sort((left, right) => left - right);
+  return sorted[Math.ceil(sorted.length * 0.75) - 1];
+}
+
+/**
+ * @param {{
+ *   metrics: { p75LcpMs: number | null, p75Cls: number | null, p75InpMs: number | null },
+ *   eligibleSamples: number
+ * }} report
+ * @param {{
+ *   p75LcpMs: number,
+ *   p75Cls: number,
+ *   p75InpMs: number,
+ *   minimumEligibleSamples: number | null
+ * }} thresholds
+ */
+export function evaluateFieldBudget(report, thresholds) {
+  if (
+    thresholds.minimumEligibleSamples === null ||
+    report.eligibleSamples < thresholds.minimumEligibleSamples ||
+    Object.values(report.metrics).some((value) => value === null)
+  ) {
+    return Object.freeze({
+      status: /** @type {const} */ ("FAIL_UNVERIFIED"),
+      passed: false,
+    });
+  }
+  const passed =
+    /** @type {number} */ (report.metrics.p75LcpMs) <= thresholds.p75LcpMs &&
+    /** @type {number} */ (report.metrics.p75Cls) <= thresholds.p75Cls &&
+    /** @type {number} */ (report.metrics.p75InpMs) <= thresholds.p75InpMs;
+  return Object.freeze({
+    status: passed
+      ? /** @type {const} */ ("PASS")
+      : /** @type {const} */ ("FAIL_THRESHOLD"),
+    passed,
+  });
+}
@@ -1,27 +0,0 @@
-import { describe, expect, it } from "vitest";
-
-import { classifyLiveHostingBaseUrl } from "../../scripts/lib/hosting-probe.mjs";
-
-describe("live hosting evidence target", () => {
-  it("accepts a canonical production HTTPS root", () => {
-    expect(
-      classifyLiveHostingBaseUrl("https://frontend.example.test/"),
-    ).toMatchObject({
-      passed: true,
-      observedOrigin: "https://frontend.example.test",
-    });
-  });
-
-  it.each([
-    ["http://frontend.example.test/", "requires HTTPS"],
-    ["https://localhost:4173/", "not live deployment evidence"],
-    ["https://127.0.0.1/", "not live deployment evidence"],
-    ["https://frontend.example.test/app/", "canonical root URL"],
-    ["https://user:secret@frontend.example.test/", "must not contain credentials"],
-  ])("rejects %s", (url, reason) => {
-    expect(classifyLiveHostingBaseUrl(url)).toMatchObject({
-      passed: false,
-      reason: expect.stringContaining(reason),
-    });
-  });
-});
@@ -0,0 +1,77 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  evaluateBundleBudget,
+  evaluateFieldBudget,
+  evaluateLabBudget,
+  percentile75,
+} from "../../src/application/policies/performance-budgets.js";
+
+describe("performance budgets", () => {
+  it("rejects initial and lazy JavaScript above their named limits", () => {
+    const thresholds = {
+      initialJsGzipBytes: 200,
+      lazyChunkGzipBytes: 120,
+    };
+    expect(
+      evaluateBundleBudget(
+        { initialJsGzipBytes: 201, lazyChunks: [] },
+        thresholds,
+      ).passed,
+    ).toBe(false);
+    expect(
+      evaluateBundleBudget(
+        {
+          initialJsGzipBytes: 100,
+          lazyChunks: [{ path: "lazy.js", gzipBytes: 121 }],
+        },
+        thresholds,
+      ).passed,
+    ).toBe(false);
+  });
+
+  it("fails lab evidence when context is absent or a metric is over budget", () => {
+    const thresholds = { lcpMs: 2500, cls: 0.1, namedInteractionMs: 200 };
+    expect(
+      evaluateLabBudget(
+        { metrics: { lcpMs: 1000, cls: 0, namedInteractionMs: 50 } },
+        thresholds,
+      ),
+    ).toMatchObject({ passed: false });
+    expect(
+      evaluateLabBudget(
+        {
+          context: {
+            runner: {},
+            browser: {},
+            viewport: {},
+            network: {},
+            cpu: {},
+            cache: {},
+            build: {},
+          },
+          metrics: { lcpMs: 2501, cls: 0, namedInteractionMs: 50 },
+        },
+        thresholds,
+      ).passed,
+    ).toBe(false);
+  });
+
+  it("uses the nearest-rank p75 and fails closed while sample minimum is deferred", () => {
+    expect(percentile75([4, 1, 3, 2])).toBe(3);
+    expect(
+      evaluateFieldBudget(
+        {
+          metrics: { p75LcpMs: 1000, p75Cls: 0.01, p75InpMs: 50 },
+          eligibleSamples: 100,
+        },
+        {
+          p75LcpMs: 2500,
+          p75Cls: 0.1,
+          p75InpMs: 200,
+          minimumEligibleSamples: null,
+        },
+      ),
+    ).toEqual({ status: "FAIL_UNVERIFIED", passed: false });
+  });
+});
@@ -0,0 +1,39 @@
+import { readFileSync } from "node:fs";
+
+import { describe, expect, it } from "vitest";
+
+describe("operational runbook contract", () => {
+  const document = JSON.parse(
+    readFileSync("config/runbooks/runbooks.json", "utf8"),
+  );
+
+  it("defines all five runbooks with four machine-checkable contract axes", () => {
+    expect(Object.keys(document.runbooks)).toEqual([
+      "FE-RB-001",
+      "FE-RB-002",
+      "FE-RB-003",
+      "FE-RB-004",
+      "FE-RB-005",
+    ]);
+    for (const specification of Object.values(document.runbooks)) {
+      expect(specification.triggerKinds.length).toBeGreaterThan(0);
+      expect(specification.containment).toEqual(expect.any(String));
+      expect(specification.window).toEqual(expect.any(String));
+      expect(specification.escalation.length).toBeGreaterThanOrEqual(2);
+      expect(specification.recoveryEvidence).toHaveLength(4);
+      expect(specification.negativeFixture).toEqual(expect.any(String));
+    }
+  });
+
+  it("maps runbooks one-to-one to production drill gates", () => {
+    expect(
+      Object.values(document.runbooks).map((runbook) => runbook.gateId),
+    ).toEqual([
+      "FE-GATE-021",
+      "FE-GATE-022",
+      "FE-GATE-023",
+      "FE-GATE-024",
+      "FE-GATE-025",
+    ]);
+  });
+});
Author	SHA1	Message	Date
donghyeon-ka	75c3f5b08c	feat: operationalize frontend incident runbooks	2026-07-25 21:30:40 +09:00
donghyeon-ka	15ddb8d474	Merge branch 'feature-web-vitals-performance-budget-contract' into develop	2026-07-25 21:26:51 +09:00
donghyeon-ka	b1625252d5	feat: enforce web vitals performance budgets	2026-07-25 21:26:51 +09:00
donghyeon-ka	9d40724ab2	Merge branch 'feature-frontend-release-cache-rollback-contract' into develop	2026-07-25 21:22:35 +09:00