Artefact — Six code exhibits across five eras

Status: stub. The excerpts are selected from source that exists on disk; each one lands in Phase 7 with two sentences on why it is good code.

The six

#	Era	Source	What the excerpt shows
1	Object-oriented ActionScript	the brief-case builder and the national beer campaign	class design, imports, encapsulation
2	Hand-written JavaScript engine	the text-effects engine from the site builder (about 2 200 lines)	easing and a timeline core
3	PHP media pipeline	the media encoder from the site builder (about 3 400 lines)	one encode operation and the FFmpeg piping around it
4	TypeScript	the vehicle-tracking application’s schema and typed service layer	types, interfaces, a router
5	Embedded C++	the Wi-Fi manager interface and implementation	interface versus implementation in firmware
6	Declarative infrastructure	the 25-line Nix package definition	pinned version, verified hash, written exit condition

Total is roughly 225 lines across twenty years, which is the point: each excerpt is chosen to show judgement rather than volume.

What it proves

That the stack changed six times and the discipline did not. Exhibit 6 is the least common of the six and the most current — a short, correct, self-documenting derivation with an exit plan is a stronger infrastructure signal than a long configuration file.

When it is delivered

Phase 7. Source paths are recorded in the planning notes; nothing is published from a path that has not been read at capture time.