OCaml HTML renderer (sx_render.ml) silently returned "" when env_get
failed for primitive function calls (str, +, len, etc.) inside HTML
elements. The Eval_error catch now falls through to eval_expr which
resolves primitives correctly. Fixes 21 rendering tests.
Rename condition system special form from "signal" to "signal-condition"
in evaluator.sx, matching the OCaml bootstrapped evaluator (sx_ref.ml).
This avoids clashing with the reactive signal function. Fixes 9
condition system tests.
1166 passed, 0 failed.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Root cause: the new conditions system's 'signal' special form shadowed
the reactive 'signal' function. (signal 0) in island bodies raised
'Unhandled condition: 0' instead of creating a signal dict.
Fix: rename condition special form to 'signal-condition' in the CEK
dispatcher. The reactive 'signal' function now works normally.
adapter-html.sx: remove cek-try that swallowed island render errors.
Islands now render directly — errors propagate for debugging.
sx_render.ml: add sx_render_to_html that calls SX adapter via CEK.
Results: 4/5 island SSR tests pass:
- Header island: logo, tagline, styled elements ✓
- Navigation buttons ✓
- Geography content ✓
- Stepper: partially renders (code view OK, ~cssx/tw in heading)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Include cssx.sx source in component-defs for client CSSX runtime.
Island placeholders now contain SX call expression for client hydration.
escape_sx_string only escapes </script, not all </ sequences.
serialize_value: no (list) wrapper, matching Python serialize() exactly.
Homepage: header renders (<sx>, tagline, copyright), stepper shows
raw SX (cssx/tw not expanding client-side). Geography fully rendered
including island hydration.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Homepage fix: path_expr "home" was evaluated as a symbol lookup (returning
the Lambda) instead of a function call. Now wraps bare symbols in a list:
home → (home) → calls the page function → returns component call.
Slug routing: auto_quote converts unknown symbols to strings before eval.
(etc (plan sx-host)) → (etc (plan "sx-host")) — resolves nested slug URLs.
Resilient SSR: render_to_buf catches Eval_error per-element and continues
rendering. Partial SSR output preserved even when some elements fail.
WASM kernel rebuilt (define shorthand + island placeholder changes).
Remaining: WASM kernel "Undefined symbol: let" — pre-existing bug in
client-side component-defs parsing. (list let ...) triggers symbol lookup
instead of special form recognition. Affects island hydration on all pages.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Islands now always emit <span data-sx-island="name"> placeholder
instead of attempting SSR. Island bodies contain client-only symbols
(signals, DOM refs) that cascade errors during native render.
Component-defs moved to /static/sx-components.sx endpoint instead of
inline <script> — avoids </script> escaping issues that broke the
client-side SX parser.
Remaining: client WASM kernel not loading components from external
endpoint (expects inline script tag). Need to configure client boot
to fetch from /static/sx-components.sx.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New render_to_buf / render_to_html_streaming in sx_render.ml — writes
HTML directly to a Buffer.t instead of building intermediate strings.
Eliminates hundreds of string concatenations per page render.
Full parallel renderer: render_to_buf, render_element_buf,
render_component_buf, render_cond_buf, render_let_buf, render_map_buf,
render_for_each_buf — all buffer-native.
HTTP server SSR + shell now use streaming renderer.
Performance (warm, 2 worker domains, 2MB RSS):
Homepage: 138-195ms TTFB (Quart: 202ms) — faster
Geography: 218-286ms TTFB (Quart: 144ms)
Throughput: 6.85 req/s at c=5 (Quart: 6.8 req/s) — matched
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Switch SSR from SX adapter to native Sx_render.render_to_html.
Islands that fail SSR emit <span data-sx-island="name"> placeholders
instead of recursing into client-only bodies. Eliminates the <home
symbol error cascade that made the homepage render 23s.
Performance (warm, single process):
Homepage: 131-191ms TTFB (was 202ms on Quart) — faster
Geography: 203-229ms TTFB (was 144ms on Quart) — close
Reactive: 155-290ms TTFB (was 187ms on Quart) — similar
Memory: 2MB RSS (was 570MB on Quart) — 285x reduction
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Islands now render their initial state as HTML on the server, like
React SSR. The client hydrates with reactive behavior on boot.
Root causes fixed:
- is_signal/signal_value now recognize Dict-based signals (from
signals.sx) in addition to native Signal values
- Register "context" as a primitive so the CEK deref frame handler
can read scope stacks for reactive tracking
- Load adapter-html.sx into kernel for SX-level render-to-html
(islands use this instead of the OCaml render module)
- Component accessors (params, body, has-children?, affinity) handle
Island values with ? suffix aliases
- Add platform primitives: make-raw-html, raw-html-content,
empty-dict?, for-each-indexed, cek-call
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Server now renders page content as HTML inside <div id="sx-root">,
visible immediately before JavaScript loads. The SX source is still
included in a <script data-mount="#sx-root"> tag for client hydration.
SSR pipeline: after aser produces the SX wire format, parse and
render-to-html it (~17ms for a 22KB page). Islands with reactive
state gracefully fall back to empty — client hydrates them.
Supporting changes:
- Load signals.sx into OCaml kernel (reactive primitives for island SSR)
- Add cek-call and context to kernel env (needed by signals/deref)
- Island-aware component accessors in sx_types.ml
- render-to-html handles Island values (renders as component with fallback)
- Fix 431 (Request Header Fields Too Large): replace SX-Components
header (full component name list) with SX-Components-Hash (12 chars)
- CORS allow SX-Components-Hash header
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- sx_render.ml: add raw! handler to HTML renderer (inject pre-rendered
content without HTML escaping)
- docker-compose.yml: move SX_USE_OCAML/SX_OCAML_BIN to shared env
(available to all services, not just sx_docs)
- hosts/ocaml/Dockerfile: OCaml kernel build stage
- shared/sx/tests/: golden test data + generator for OCaml render tests
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
