Measured, CI-enforced quality signals. The numbers below come from CI and the evidence pipeline — they are gated, not hand-asserted: if a score regresses below its threshold, the build fails.
\nTwo independent checks run on every CI build (`.github/workflows/ci.yml`).
\n| Page | Score |
\n|---|:--:|
\n| Home `/` | 100 |
\n| Explore `/explore` | 100 |
\n| Artwork `/artwork/[id]` | 100 |
\n`scripts/lighthouse-a11y.mjs` fails the build if any page scores below 95. Run: `pnpm lighthouse:ci`.
\nZero critical / serious / moderate WCAG 2A + 2AA violations across 18 public routes: home, explore, records, linked-art, patterns, insights, graph, entities, iiif, issues, agents, automation, etl/mapper, roadmap, getty, curator/reconciliation, plus dynamic `/artwork/[id]` and `/entity/[id]`. `scripts/a11y-check.ts` fails the build on any severe violation. Run: `pnpm a11y:ci`.
\n`scripts/k6-slo.js` enforces a per-scenario latency + error-rate budget under load (16 req/s, up to 24 VUs). Latest measured run (`artifacts/performance/k6-slo-summary.json`) — all measured scenarios comfortably within budget:
\n| Scenario | p95 budget | measured p95 | error budget | measured |
\n|---|:--:|:--:|:--:|:--:|
\n| Cached record read | < 200 ms | 73.5 ms | < 1% | 0.00% |
\n| Cold record read | < 500 ms | 56.1 ms | < 1% | 0.00% |
\n| Keyword / facet search | < 300 ms | 55.1 ms | < 1% | 0.00% |
\n| SPARQL (whitelisted) | < 2000 ms | _needs GraphDB_ | < 1% | — |
\n| IIIF tile serving | < 100 ms | _needs IIIF infra_ | < 1% | — |
\nThe k6 thresholds abort the run on any breach. Enforced by `pnpm k6:slo:ci` in the evidence pipeline (`.github/workflows/era-c-exit-gate-evidence.yml`).
\nThe July 28, 2026 production trace covers Home, Explore, one artwork detail,
\nProjects, and Pilot on mobile and desktop. All ten cold-load traces pass the
\nP1.5 budgets: the slowest LCP is Explore mobile at 2,286 ms, the largest CLS
\nis Pilot desktop at 0.0665, and a representative interaction measures
\n28 ms INP. CrUX did not return page-level field data, so these are lab
\nresults. Methodology and route-level measurements:
\nfrontend-performance-baseline.md(ops/frontend-performance-baseline.md).
\nThe Step 6 follow-up axe run passes all 18 routes. The Home overflow and
\nlow-resolution V&A thumbnail blockers are fixed locally with regression
\ncoverage. The post-fix local matrix passes every mobile/desktop performance and
\nvisual check, with 0.00 CLS, a maximum 1,628 ms LCP, and 29 ms representative
\nINP. A deployed-revision capture remains before closing P1.5.
\n`pnpm test:coverage` (c8) — 89.4% lines · 92.1% functions · 75.5% branches across 1,116 tests, gated in CI (floor 85 / 85 / 70). Core application code: `src/services` 91.9%, `src/adapters` 91.3%, `src/gateway` 100%.
\nThe canonical full suite stays serial for shared-state determinism and uses
\nNode's compact dot reporter. On July 28, 2026, four diagnostic shards passed
\n`1,704/1,704` tests in about 158 seconds combined, and the equivalent unsharded
\ndot-reporter run passed in 154 seconds. The verbose reporter exceeded five
\nminutes only when its captured output saturated the command channel.
\n_Last refreshed: 2026-07-28. Accessibility and coverage numbers are reproduced on every CI run; backend performance numbers are from the latest evidence-pipeline run; frontend metrics are the dated production lab baseline._
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