Major architectural change: page function dispatch and handler execution
now go through the OCaml kernel instead of the Python bootstrapped evaluator.
OCaml integration:
- Page dispatch: bridge.eval() evaluates SX URL expressions (geography, marshes, etc.)
- Handler aser: bridge.aser() serializes handler responses as SX wire format
- _ensure_components loads all .sx files into OCaml kernel (spec, web adapter, handlers)
- defhandler/defpage registered as no-op special forms so handler files load
- helper IO primitive dispatches to Python page helpers + IO handlers
- ok-raw response format for SX wire format (no double-escaping)
- Natural list serialization in eval (no (list ...) wrapper)
- Clean pipe: _read_until_ok always sends io-response on error
SX adapter (aser):
- scope-emit!/scope-peek aliases to avoid CEK special form conflict
- aser-fragment/aser-call: strings starting with "(" pass through unserialized
- Registered cond-scheme?, is-else-clause?, primitive?, get-primitive in kernel
- random-int, parse-int as kernel primitives; json-encode, into via IO bridge
Handler migration:
- All IO calls converted to (helper "name" args...) pattern
- request-arg, request-form, state-get, state-set!, now, component-source etc.
- Fixed bare (effect ...) in island bodies leaking disposer functions as text
- Fixed lower-case → lower, ~search-results → ~examples/search-results
Reactive islands:
- sx-hydrate-islands called after client-side navigation swap
- force-dispose-islands-in for outerHTML swaps (clears hydration markers)
- clear-processed! platform primitive for re-hydration
Content restructuring:
- Design, event bridge, named stores, phase 2 consolidated into reactive overview
- Marshes split into overview + 5 example sub-pages
- Nav links use sx-get/sx-target for client-side navigation
Playwright test suite (sx/tests/test_demos.py):
- 83 tests covering hypermedia demos, reactive islands, marshes, spec explorer
- Server-side rendering, handler interactions, island hydration, navigation
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>
Evaluator: data-first higher-order forms — ho-swap-args auto-detects
(map coll fn) vs (map fn coll), both work. Threading + HO: (-> data
(map fn)) dispatches through CEK HO machinery via quoted-value splice.
17 new tests in test-cek-advanced.sx.
Fix plan pages: add mother-language, isolated-evaluator, rust-wasm-host
to page-functions.sx plan() — were in defpage but missing from URL router.
Aser error handling: pages.py now catches EvalError separately, renders
visible error banner instead of silently sending empty content. All
except blocks include traceback in logs.
Scope primitives: register collect!/collected/clear-collected!/emitted/
emit!/context in shared/sx/primitives.py so hand-written _aser can
resolve them (fixes ~cssx/flush expansion failure).
New test file: shared/sx/tests/test_aser_errors.py — 19 pytest tests
for error propagation through all aser control flow forms.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Two fundamental environment bugs fixed:
1. env-set! was used for both binding creation (let, define, params)
and mutation (set!). Binding creation must NOT walk the scope chain
— it should set on the immediate env. Only set! should walk.
Fix: introduce env-bind! for all binding creation. env-set! now
exclusively means "mutate existing binding, walk scope chain".
Changed across spec (eval.sx, cek.sx, render.sx) and all web
adapters (dom, html, sx, async, boot, orchestration, forms).
2. makeLambda/makeComponent/makeMacro/makeIsland used merge(env) to
flatten the closure into a plain object, destroying the prototype
chain. This meant set! inside closures couldn't reach the original
binding — it modified a snapshot copy instead.
Fix: store env directly as closure (no merge). The prototype chain
is preserved, so set! walks up to the original scope.
Tests: 499/516 passing (96.7%), up from 485/516.
Fixed: define self-reference, let scope isolation, set! through
closures, counter-via-closure pattern, recursive functions.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
