The first visual code that draws. Sections 17.4 through 17.14 are implemented
against Format Specification revision 0.8, and the standalone artifact now has a
stage canvas that renders a declared scene.
The renderer is split so that the automated traces of 17.16 can run without a
display, which is what those traces require. visual-engine.js resolves an
exhibit's objects once at their instantiation boundary, composes the
scene-to-device chain, sorts by depth, applies fog and the compositing order,
and emits a **frame plan** in device pixels; visual-canvas2d.js turns a plan
into drawing calls. A plan carries the numeric oracles the traces ask for - a
known scene point at a known display point, a perspective factor, a fog
fraction, a sort order - where a canvas carries only pixels.
visual-math.js implements the affine matrices, the normative local transform of
17.11, the directed arc sweep of 17.9 with its bound checked before
normalization, and section 2 color parsing with the fog and ramp arithmetic of
17.6 and 18.2. Colors outside the four documented forms are ERR_TYPE_MISMATCH:
exact components are what make per-object fog renderer-independent.
visual-geometry.js reduces all fourteen primitives to subpaths of lines and
cubic Beziers, so an affine map carries geometry exactly rather than
approximately. It implements the local extents and anchors of 17.9 - a
rectangle anchored top-left, circular primitives centered - the uniform cardinal
form of catmull-rom with its open-duplication and closed-wrap index rules, the
straight closing segment of a closed bezier spline, and endpoint-parameterized
elliptical arcs.
The composition chain of 19.3 is implemented as written: the fit matrix carries
the contain and cover centering offsets, the camera center is mapped into CSS
coordinates before the translation is formed, perspective acts about the
projection center, and the device-pixel multiplier is applied exactly once and
drops below 1 on a display larger than 4096. Scalars with no axis - stroke
widths, radii, dash lengths - take the single uniform factor g, so a nonuniform
stretch never distorts a stroke.
Depth follows 17.6: effective depth accumulates z and translate.z up the tree,
sortable units order farthest-first with the documented tie-break, a point's own
z projects that point without making it a sortable unit, and an object at or
behind the eye is culled with no diagnostic. Compositing follows 17.12: opacity
multiplies down the tree while layer opacity applies once at the layer, and the
sixteen buffer allocations per frame are granted nearest-first so refusals fall
on the far content, each diagnosed under the 19.5 cadence rather than omitted
silently.
visual-validation.js gains the object tree: the fifteen object types and their
declared fields, no `id` and no `layer` on an object, a declared fill on a
stroke-only primitive, a mask only on a group and only naming its own child,
path legality, spline modes and point counts, gradient stop order, and every
authoring limit of 19.5 that applies to a drawn object.
While implementing V10 I corrected the buffer-accounting rule I had written into
17.12: counting buffers as concurrently live made 19.5's farthest-first shedding
nearly unreachable, since group nesting is already capped at 8. The rule is now
16 allocations per frame, which is the per-frame reading "pass budget" has
carried since 17.5 first used it. The arc-sweep prose is likewise corrected to
normalize the signed delta, so 350 -> 10 clockwise is the 20-degree sweep the
text always claimed rather than 340 the long way round.
test/phase4-renderer.test.mjs adds 22 tests covering traces 1 through 13 of
17.16 plus buffer shedding and the backend's call order. npm test goes from 131
to 153 passing. Traces 15 and 16 remain user-observed, and no procedural system,
automation track, or post-effect executes yet - 4e and 4f own those.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_0162Jb1J36judZNT8fHabGVt
The standalone build's source list is explicit, so the two modules the previous
commit added were called by validator.js inside XZBT.html without being defined
there. Both are now bundled ahead of validator.js and resolution.js, which are
their only consumers.
visual-validation.js used a local isPlainObject that would have collided with
validator.js's own once the bundler strips imports and concatenates into one
scope; it uses the shared isRecord of types.js instead.
The rebuilt artifact parses and carries validateVisualSubsystem and
matchVisualTarget. npm test remains at 131 passing.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_0162Jb1J36judZNT8fHabGVt
Review Phase 3a before building on it, then implement Phase 3b.
The Phase 3a draft had four blocking defects: nodes were described as a
keyed map while every documented example carried an inline `id` field,
so under the strict unknown-field policy each minimal example would have
failed its own acceptance trace; no section said where a node lives; the
`audioMaxFrequency` ceiling was declared a semantic-stage error while
depending on a live AudioContext sample rate; and the sample-hold PRNG
child key that section 9.3 requires was undocumented. Close all four,
plus nine further gaps in noise seeding, spectral definitions, impulse
decay math, Nyquist handling, missing-field codes, LFO phase origin, the
units table, node-type staging, and a duplicated diagnostics table.
Add Format Specification section 15 for Phase 3b: nine processing and
routing node contracts, the component instance node, audio routing and
modulation with an explicit modulatable-property registry, twelve graph
legality rules, authoring limits, components with a component-scoped
`inputs.*` namespace, sound definitions and recipes, and buses.
Implement the subsystem in three modules. audio-contract.js holds the
declarative node, limit, and modulation tables every consumer reads.
audio-graph.js validates, expands components, and checks legality
without ever opening an AudioContext. audio-engine.js resolves node
fields once from the seeded stream, clamps frequencies to the live
device ceiling, realizes the graph through Web Audio, and owns the
runtime AudioSubsystem. Extend the schema, delegate the standalone
validator's audio checks to the shared module rather than carrying a
second implementation, and add a generic audio fixture.
Phase 3 is not accepted. Automation precedence, the lifecycle state
machine, unlock behavior, voice ceilings, and master protection are
Phase 3c. No sound has been heard from any build, so the audio
acceptance challenge, peak and finite-sample capture, and listening
observations remain open.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_011FWPdCqKaaDnP9NC3JAwh6
LabyricornandClaude Opus 5