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/history/history-overview.md

@@ -0,0 +1,25 @@
+---
+id: history-overview
+area: history
+level: 1
+title: "History"
+claim: "Delivered interactive work for twenty-two agencies and twenty-three brands between 1999 and 2014 — the commercial apprenticeship that produced the range."
+confidence: historic
+period: "1999–2014"
+tech: [ActionScript, PHP, JavaScript, MySQL, XML, React, Python, Go, HTMX]
+metrics: [{label: "agencies on the client wall", value: 22}, {label: "brands delivered for", value: 23}, {label: "code exhibits kept", value: 6}]
+artefacts: [{type: doc, label: "The client wall", url: "content/history/l3/history-client-wall.md"}, {type: doc, label: "Six code exhibits across five eras", url: "content/history/l3/history-code-exhibits.md"}]
+public: true
+last_verified: 2026-10-26
+tags: [history, agencies, brands, career]
+---
+
+# History
+
+**Claim.** Fifteen years of agency and product work — national campaigns, bank and broadcaster platforms, betting front-ends, and a lot of rescue missions — for twenty-two agencies and twenty-three brands.
+
+**Status.** Historic. This is the 1999–2014 era, presented as what it was: the commercial apprenticeship that produced the range.
+
+**What it is not.** It is not a Flash page. The languages changed six times across this period — ActionScript, PHP, JavaScript, React, Python, and now Go with HTMX — and the exhibits are chosen to show that rather than to show a decade.
+
+**Start here.** [The engagement record](history-engagements.md) explains the eras, the work and what each exhibit demonstrates.