Changelog

All notable changes to this project will be documented here.

The format follows Keep a Changelog. This project adheres to Semantic Versioning.

[0.2.0] - 2026-06-12

Breaking: renamed modules Diffo.Ieee1164.* → Ieee1164.*, with sources moved to lib/ieee1164/. Frees the Diffo.Ieee1164.* namespace.
Modelled the world relationship as an EXTENDS lattice (an outer world extends its inner worlds, with the x01z/ux01 diamond joining at ux01z).
is_x is now an operation; the two clans are intrinsic to values as OBSERVABLE / UNOBSERVABLE, and the resolver derives its conflict tier from that.
Synchronicity clock and sample are kind-agnostic instances (INSTANCE_OF the abstract signal / value); domain is a concept.
Simplified copyright lines to © diffo-dev across SPDX, NOTICE, and REUSE.

ux01z_world, the std_ulogic_vector signal, and the synchronicity layer in the yarn.
std_logic_1164_worlds.svg glyph and a knowing-livebook section drawing the projection worlds as nested closed regions of the resolution matrix (with bit the non-closing 1076 counterpoint).
mix ieee1164.gen_pngs — render the glyph SVGs to shareable PNGs via resvg (dev-only); SVGs remain the source of truth.

IEEE 1164 knowledge graph expressed as Cypher-style yarn and compiled into %Artefact{} form
Diffo.Ieee1164.stream/0 and Diffo.Ieee1164.stream_integrated/0 for progressive artefact access
Mix tasks ieee1164.gen_uuids and ieee1164.compile for the build pipeline
Livebook: Yarning with IEEE 1164 — an interactive chapter-by-chapter journey through the standard
Livebook: Knowing std_logic_1164 — valuing, being, knowing, and doing with what was learned
SVG glyphs memorialising the resolution matrix in four eras: Dark Mode, Green Phosphor, Hercules, and X11
SVG glyphs for the pre-journey (unknown) and instructional (matrix, black key) states
REUSE-compliant licensing: Apache-2.0 for code, CC BY-NC-ND 4.0 for images