Phase 1: content source of truth — 40 documents across six areas

Satisfies the Phase 1 Definition of Done:

- content/ validates cleanly against the frozen schema. `make validate`
  reports OK: 40 document(s) validated, 0 violations.
- Six areas exist, each with an L1 entry: ai-overview, platform-overview,
  edge-overview, products-overview, history-overview, about-overview.
- All six areas have an L2 entry: ai-systems, platform-estate, edge-fleet,
  products-business, history-engagements, about-narrative.
- 28 L3 artefact stubs under content/<area>/l3/. Every artefacts[].url in
  every document resolves to one of them; the validator proves there are no
  dangling references (and a deliberately broken copy exits 1).
- Every metric value traces to a source line in the evidence notes or the
  approved metric set in reference/content-map.md (per-metric citations are
  recorded in the AUD-131 completion comment).
- Every document carries confidence and last_verified=2026-10-26; the
  validator rejects a missing or non-canonical value.
- docs/content-redaction.md records the redaction pass: identifiers, third
  party personal data, credentials and infrastructure detail excluded, with
  reasons, plus the two numbers that are reported rather than smoothed.

Honesty positions held: 3 businesses active (12 adoptions over time),
Where-Woof deployed and pre-market, failures kept in (edge-failures), no
promotion of in-progress work to delivered.

No site code, no templates, no CSS, no rendering (Phase 2).

content/edge/l3/edge-front-door.md

@@ -0,0 +1,35 @@
+---
+id: edge-front-door
+area: edge
+level: 3
+title: "Artefact — Front door · vision · voice · and a rebuild"
+claim: "A doorbell that sees a person · describes the image · speaks to the house and to the visitor · and is currently being rebuilt with a time-of-flight sensor."
+confidence: in-progress
+period: "2020–"
+tech: [ESP32, ESP32-CAM, PIR, mmWave, VL53L0X, MiniMax, Piper, Whisper, Apprise]
+metrics: [{label: "voice engines in use", value: 2}, {label: "presence sensing inputs", value: "PIR · mmWave · time-of-flight"}]
+artefacts: []
+public: true
+last_verified: 2026-10-26
+tags: [edge, doorbell, vision, voice, artefact]
+---
+
+# Artefact — Front door · vision · voice · and a rebuild
+
+**Status: in progress.** The device was built and is being rebuilt. The page states this rather than describing it as finished.
+
+## What the artefact is
+
+A door unit with microphone, speaker, camera, button, PIR and mmWave presence. It detects a person, captures an image, logs it, has the image described, and announces to the house who is at the door before offering a spoken greeting; the visitor's reply is captured and played over the house speakers, with an alert pushed to a phone. Voice output ran on one provider and now runs on a cloned voice with a fallback to a local synthesiser.
+
+## What it proves
+
+Vision, voice and actuation in one device under real constraints — latency that a person at a door will tolerate, and a failure mode that must be polite.
+
+## Limits stated on the page
+
+The measurement it is being rebuilt around: presence detection with a time-of-flight ranging sensor, to stop the unit greeting people who are walking past rather than standing at the door. Until the rebuild is finished the honest label is `in-progress`.
+
+## When it is delivered
+
+Phase 7 for photos and the sensor change. Source: evidence notes section 1.