Clicking a blog link now fragment-swaps #content with URL push + working back
button, no full reload — the SX-htmx engine driving the same OCaml kernel the
server runs. Six bugs in the source-load + boost path, found by bisecting in
chromium, all fixed:
1. Import double-apply (sx_server.ml x2, sx_browser.ml): the import suspension
handlers computed `key = library_name_key lib_spec` then called
`library_loaded_p key` — but library_loaded_p applies library_name_key
itself, so it ran sx_to_list on a string and crashed ("Expected list, got
string"). Only unloaded libs suspend, so it only bit lazy imports. Pass the
spec, not the key.
2. Unloaded-import crash (spec/evaluator.sx + sx_ref.ml library_exports): an
import of a not-yet-loaded library returned nil exports, and bind-import-set
did (keys nil) -> crash. Return an empty dict so the import is a graceful
no-op (lazy symbol resolution covers real usage).
3. value_to_js missing Integer (sx_browser.ml): integers passed to host methods
were mishandled, so dom-query-all's (host-call node-list "item" i) ignored i
and returned node 0 for every index — every element aliased the first, so
only one link ever boosted. Add the Integer -> JS number case.
4. browser-same-origin? rejected relative URLs (browser.sx x2): it only did
(starts-with? url origin), so "/alpha/" was treated as cross-origin and
should-boost-link? refused every relative link. Accept scheme-less,
non-protocol-relative URLs.
5. dom-query-in undefined (orchestration.sx x2): the swap path called a function
that exists nowhere; it's just dom-query with a container arg.
6. Lazy-deps never loaded under source fallback (sx-platform.js): lazy symbol
resolution only fires on the VM GLOBAL_GET path, but source-loaded swap
callbacks run on the CEK and raise instead of lazy-loading, so the post-swap
hs-boot-subtree!/htmx-boot-subtree! were undefined and aborted URL push.
Preload the manifest's lazy-deps.
Verified: native host conformance 271/271; lib/host/playwright/spa-check 4/4
(boot, boost, fragment swap + URL push, back button) in real chromium against an
ephemeral durable host server.
- dom-visible?: check element display != none (web/lib/dom.sx)
- json-stringify: JSON.stringify via host-call (web/lib/browser.sx)
- hs-coerce Boolean: use hs-falsy? for JS-compatible truthiness
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Two bugs fixed:
1. Links: bytecode compiler doesn't handle &rest params — treats them as
positional, so (first rest) gets a raw string instead of a list.
Replaced &rest with explicit optional params in all bytecode-compiled
web SX files (dom-query, dom-add-listener, browser-push-state, etc.).
The VM already pads missing args with Nil.
2. Reactive counter: signal-remove-sub! used (filter ...) which returns
immutable List, but signal-add-sub! uses (append!) which only mutates
ListRef. Subscribers silently vanished after first effect re-run.
Fixed by adding remove! primitive that mutates ListRef in-place.
Also:
- Added evalVM API to WASM kernel (compile + run through bytecode VM)
- Added scope tracing (scope-push!/pop!/peek/context instrumentation)
- Added Playwright reactive mode for debugging island signal/DOM state
- Replaced cek-call with direct calls in core-signals.sx effect/computed
- Recompiled all 23 bytecode modules
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
dom-lib and browser-lib were listed in ADAPTER_FILES but never actually
transpiled — their functions only existed as native PLATFORM_*_JS code.
Add them to the build loop so the FFI library wrappers are compiled.
Add hostCall/hostGet/etc. variable aliases for transpiled code, and
console-log to browser.sx for runtime-eval'd SX code.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Introduce 8 irreducible host FFI primitives that replace 40+ native DOM
and browser primitives:
host-global — access global object (window/document)
host-get — read property from host object
host-set! — write property on host object
host-call — call method on host object
host-new — construct host object
host-callback — wrap SX function as host callback
host-typeof — check host object type
host-await — await host promise
All DOM and browser operations are now expressible as SX library
functions built on these 8 primitives:
web/lib/dom.sx — createElement, querySelector, appendChild,
setAttribute, addEventListener, classList, etc.
web/lib/browser.sx — localStorage, history, fetch, setTimeout,
promises, console, matchMedia, etc.
The existing native implementations remain as fallback — the library
versions shadow them in transpiled code. Incremental migration: callers
don't change, only the implementation moves from out-of-band to in-band.
JS 957+1080, Python 744, OCaml 952 — zero regressions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
