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rose-ash/plans/hs-conformance-to-100.md

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# Hyperscript conformance → 100%
Goal: take the hyperscript upstream conformance suite from **1213/1496 (81%)** to a clean 100%. Queue-driven — single-agent loop on `architecture` branch, one cluster per commit.
## North star
```
Baseline: 1213/1496 (81.1%)
Target: 1496/1496
Gap: 283 tests (130 real fails + 153 SKIPs)
```
Track after each iteration via `mcp__hs-test__hs_test_run` on the relevant suite, not the whole thing (full runs take 10+min and include hanging tests — 196/199/200/615/1197/1198 hang under the 200k step limit).
## How to run tests
```
mcp__hs-test__hs_test_run(suite="hs-upstream-<cluster>") # fastest, one suite
mcp__hs-test__hs_test_run(start=0, end=195) # early range
mcp__hs-test__hs_test_run(start=201, end=614) # mid range (skip hypertrace hangs)
mcp__hs-test__hs_test_run(start=616, end=1196) # late-1, skip repeat-forever hangs
mcp__hs-test__hs_test_run(start=1199) # late-2 after hangs
```
## File layout
Runtime/compiler/parser live in `lib/hyperscript/*.sx`. The test runner at `tests/hs-run-filtered.js` loads `shared/static/wasm/sx/hs-*.sx`**after every `.sx` edit you must `cp lib/hyperscript/<file>.sx shared/static/wasm/sx/hs-<file>.sx`**.
The test fixtures live in `spec/tests/test-hyperscript-behavioral.sx`, generated from `tests/playwright/generate-sx-tests.py`. **Never edit the behavioral.sx fixture directly** — fix the generator or the runtime.
## Cluster queue
Each cluster below is one commit. Order is rough — a loop agent may skip ahead if a predecessor is blocked. **Status:** `pending` / `in-progress` / `done (+N)` / `blocked (<reason>)`.
### Bucket A: runtime fixes, single-file (low risk, high yield)
1. **[done (+4)] fetch JSON unwrap** — `hs-upstream-fetch` 4 tests (`can do a simple fetch w/ json` + 3 variants) got `{:__host_handle N}`. Root: `hs-fetch` in `runtime.sx` returns raw host Response object instead of parsing JSON body. Fix: when format is `"json"`, unwrap via `host-get "_json"` and `json-parse`. Expected: +4.
2. **[done (+1)] element → HTML via outerHTML** — `asExpression / converts an element into HTML` (1 test) + unlocks response fetches. Mock DOM `El` class in `tests/hs-run-filtered.js` has no `outerHTML` getter. Add a getter computed from `tagName` + `attributes` + `children` (recurse). Expected: +1 direct, + knock-on in fetch.
3. **[done (+2)] Values dict insertion order** — `asExpression / Values | FormEncoded` + `| JSONString` (2 tests) — form fields come out `lastName, phone, firstName, areaCode`. Root: `hs-values-absorb` in `runtime.sx` uses `dict-set!` but keys iterate in non-insertion order. Investigate `hs-gather-form-nodes` walk — the recursive `kids` traversal silently fails when `children` is a JS Array (not sx-list), so nested inputs arrive via a different path. Fix: either coerce children to sx-list at the gather boundary OR rewrite gather to explicitly use sx-level iteration helpers. Expected: +2.
4. **[done (+3)] `not` precedence over `or`** — `expressions/not` 3 tests (`not has higher precedence than or`, `not with numeric truthy/falsy`, `not with string truthy/falsy`). Check parser precedence — `not` should bind tighter than `or`. Fix in `parser.sx` expression-level precedence. Expected: +3.
5. **[done (+1)] `some` selector for nonempty match** — `expressions/some / some returns true for nonempty selector` (1 test). `some .class` probably returns the list, not a boolean. Runtime fix. Expected: +1.
6. **[done (+2)] string template `${x}`** — `expressions/strings / string templates work w/ props` + `w/ braces` (2 tests). Template interpolation isn't substituting property accesses. Check `hs-template` runtime. Expected: +2.
7. **[done (+1) — partial, 3 tests remain: inserted-button handler doesn't fire for afterbegin/innerHTML paths; might need targeted trace of hs-boot-subtree! or _setInnerHTML timing] `put` hyperscript reprocessing** — `put / properly processes hyperscript at end/start/content/symbol` (4 tests, all `Expected 42, got 40`). After a put operation, newly inserted HS scripts aren't being activated. Fix: `hs-put-at!` should `hs-boot-subtree!` on the target after DOM insertion. Expected: +4.
8. **[done (+1)] `select returns selected text`** (1 test, `hs-upstream-select`). Runtime `hs-get-selection` helper reads `window.__test_selection` stash (or falls back to real `window.getSelection().toString()`). Compiler rewrites `(ref "selection")` to `(hs-get-selection)`. Generator detects the `createRange` / `setStart` / `setEnd` / `addRange` block and emits a single `(host-set! ... __test_selection ...)` op with the resolved text slice of the target element. Expected: +1.
9. **[done (+4)] `wait on event` basics** — `wait / can wait on event`, `on another element`, `waiting ... sets it to the event`, `destructure properties in a wait` (4 tests). Event-waiter suspension issue. Expected: +3-4.
10. **[done (+1)] `swap` variable ↔ property** — `swap / can swap a variable with a property` (1 test). Swap command doesn't handle mixed var/prop targets. Expected: +1.
11. **[done (+3) — partial, `hide element then show element retains original display` remains; needs `on click N` count-filtered event handlers, out of scope for this cluster] `hide` strategy** — `hide / can configure hidden as default`, `can hide with custom strategy`, `can set default to custom strategy`, `hide element then show element retains original display` (4 tests). Strategy config plumbing. Expected: +3-4.
12. **[done (+2)] `show` multi-element + display retention** — `show / can show multiple elements with inline-block`, `can filter over a set of elements using the its symbol` (2 tests). Expected: +2.
13. **[done (+2) — partial, `can toggle for a fixed amount of time` needs an async mock scheduler (sync io-sleep collapses the toggle/un-toggle into one click frame)] `toggle` multi-class + timed + until-event** — `toggle` (3 assertion-fail tests). Expected: +3.
14. **[done (+1)] `unless` modifier** — `unlessModifier / unless can conditionally execute` (1 test). Parser/compiler addition. Expected: +1.
15. **[done (+2) — partial, `can use initial to transition to original value` needs `on click N` count-filtered events (same sync-mock block as clusters 11/13)] `transition` query-ref + multi-prop + initial** — `transition` 3 tests. Expected: +2-3.
16. **[done (+1)] `send can reference sender`** — 1 assertion fail. Expected: +1.
17. **[blocked: tell semantics are subtle — `me` should stay as the original element for explicit `to me` writes but the implicit default for bare `add .bar` inside `tell X` should be X. Attempted just leaving `you`/`yourself` scoped (dropping the `me` shadow) regressed 4 passing tests (`restores proper implicit me`, `works with an array`, etc.) which rely on bare commands using `me` as told-target. Proper fix requires a `beingTold` symbol distinct from `me`, with bare commands compiling to `beingTold-or-me` and explicit `me` always the original — more than a 30-min cluster budget.] `tell` semantics** — `tell / attributes refer to the thing being told`, `does not overwrite me symbol`, `your symbol represents thing being told` (3 tests). Expected: +3.
18. **[done (+2)] `throw respond async/sync`** — `throw / can respond to async/sync exceptions in event handler` (2 tests). Expected: +2.
### Bucket B: parser/compiler additions (medium risk, shared files)
19. **[pending] `pick` regex + indices** — `pick` 13 tests. Regex match, flags, `of` syntax, start/end, negative indices. Big enough that a single commit might fail — break into pick-regex and pick-indices if needed. Expected: +10-13.
20. **[pending] `repeat` property for-loops + where** — `repeat / basic property for loop`, `can nest loops`, `where clause can use the for loop variable name` (3 tests). Expected: +3.
21. **[done (+1)] `possessiveExpression` property access via its** — `possessive / can access its properties` (1 test, Expected `foo` got ``). Expected: +1.
22. **[blocked: tried three compile-time emits — (1) guard (can't catch Undefined symbol since it's a host-level error, not an SX raise), (2) env-has? (primitive not loaded in HS kernel — `Unhandled exception: "env-has?"`), and (3) hs-win-call runtime helper (works when reached but SX can't CALL a host-handle function directly — `Not callable: {:__host_handle N}` because NativeFn is not callable here). Needs either a host-call-fn primitive with arity-agnostic dispatch OR a symbol-bound? predicate in the HS kernel.] window global fn fallback** — `regressions / can invoke functions w/ numbers in name` + unlocks several others. When calling `foo()` where `foo` isn't SX-defined, fall back to `(host-global "foo")`. Design decision: either compile-time emit `(or foo (host-global "foo"))` via a helper, or add runtime lookup in the dispatch path. Expected: +2-4.
23. **[done (+1)] `me symbol works in from expressions`** — `regressions` (1 test, Expected `Foo`). Check `from` expression compilation. Expected: +1.
24. **[pending] `properly interpolates values 2`** — URL interpolation regression (1 test). Likely template string + property access. Expected: +1.
25. **[pending] `can support parenthesized commands and features`** — `parser` (1 test, Expected `clicked`). Parser needs to accept `(cmd...)` grouping in more contexts. Expected: +1.
### Bucket C: feature stubs (DOM observer mocks)
26. **[pending] resize observer mock + `on resize`** — 3 tests. Add a minimal `ResizeObserver` mock to `hs-run-filtered.js`, plus parse/compile `on resize`. Expected: +3.
27. **[pending] intersection observer mock + `on intersection`** — 3 tests. Mock `IntersectionObserver`; compile `on intersection` with margin/threshold modifiers. Expected: +3.
28. **[pending] `ask`/`answer` + prompt/confirm mock** — `askAnswer` 4 tests. **Requires test-name-keyed mock**: first test wants `confirm → true`, second `confirm → false`, third `prompt → "Alice"`, fourth `prompt → null`. Keyed via `_current-test-name` in the runner. Expected: +4.
29. **[pending] `hyperscript:before:init` / `:after:init` / `:parse-error` events** — 6 tests in `bootstrap` + `parser`. Fire DOM events at activation boundaries. Expected: +4-6.
30. **[pending] `logAll` config** — 1 test. Global config that console.log's each command. Expected: +1.
### Bucket D: medium features (bigger commits, plan-first)
31. **[pending] runtime null-safety error reporting** — 18 tests in `runtimeErrors`. When accessing `.foo` on nil, emit a structured error with position info. One coordinated fix in the compiler emit paths for property access, function calls, set/put. Expected: +15-18.
32. **[pending] MutationObserver mock + `on mutation` dispatch** — 15 tests in `on`. Add MO mock to runner. Compile `on mutation [of attribute/childList/attribute-specific]`. Expected: +10-15.
33. **[pending] cookie API** — 5 tests in `expressions/cookies`. `document.cookie` mock in runner + `the cookies` + `set the xxx cookie` keywords. Expected: +5.
34. **[pending] event modifier DSL** — 8 tests in `on`. `elsewhere`, `every`, `first click`, count filters (`once / twice / 3 times`, ranges), `from elsewhere`. Expected: +6-8.
35. **[pending] namespaced `def`** — 3 tests. `def ns.foo() ...` creates `ns.foo`. Expected: +3.
### Bucket E: subsystems (DO NOT LOOP — human-driven)
All five have design docs on their own worktree branches pending review + merge. After merge, status flips to `design-ready` and they become eligible for the loop.
36. **[design-done, pending review — `plans/designs/e36-websocket.md` on `worktree-agent-a9daf73703f520257`] WebSocket + `socket`** — 16 tests. Upstream shape is `socket NAME URL [with timeout N] [on message [as JSON] …] end` with an **implicit `.rpc` Proxy** (ES6 Proxy lives in JS, not SX), not `with proxy { send, receive }` as this row previously claimed. Design doc has 8-commit checklist, +1216 delta estimate. Ship only with intentional design review.
37. **[design-done, pending review — `plans/designs/e37-tokenizer-api.md` on `worktree-agent-a6bb61d59cc0be8b4`] Tokenizer-as-API** — 17 tests. Expose tokens as inspectable SX data via `hs-tokens-of` / `hs-stream-token` / `hs-token-type` etc; type-map current `hs-tokenize` output to upstream SCREAMING_SNAKE_CASE. 8-step checklist, +1617 delta.
38. **[design-done, pending review — `plans/designs/e38-sourceinfo.md` on `agent-e38-sourceinfo`] SourceInfo API** — 4 tests. Inline span-wrapper strategy (not side-channel dict) with compiler-entry unwrap. 4-commit plan.
39. **[design-done, pending review — `plans/designs/e39-webworker.md` on `hs-design-e39-webworker`] WebWorker plugin** — 1 test. Parser-only stub that errors with a link to upstream docs; no runtime, no mock Worker class. Hand-write the test (don't patch the generator). Single commit.
40. **[design-done, pending review — `plans/designs/e40-real-fetch.md` on `worktree-agent-a94612a4283eaa5e0`] Fetch non-2xx / before-fetch event / real response object** — 7 tests. SX-dict Response wrapper `{:_hs-response :ok :status :url :_body :_json :_html}`; restructured `hs-fetch` that always fetches wrapper then converts by format; test-name-keyed `_fetchScripts`. 11-step checklist. Watch for regression on cluster-1 JSON unwrap.
### Bucket F: generator translation gaps (after bucket A-D)
Many tests are `SKIP (untranslated)` because `tests/playwright/generate-sx-tests.py` bailed with `return None`. These need patches to the generator to recognize more JS test patterns. Estimated ~25 recoverable tests. Defer to a dedicated generator-repair cluster once the queue above drains.
---
## Ground rules for the loop agent
1. **One cluster per commit.** Don't batch. Short commit message: `HS: <cluster name> (+N tests)`.
2. **Baseline first, verify at the end.** Before starting: record the current pass count for the target suite AND for one smoke range (0-195). After fixing: rerun both. Abort and mark blocked if:
- Target suite didn't improve by at least +1.
- Smoke range regressed (any test flipped pass → fail).
3. **Never edit `.sx` files with `Edit`/`Read`/`Write`.** Use sx-tree MCP (`sx_read_subtree`, `sx_replace_node`, `sx_insert_child`, `sx_insert_near`, `sx_replace_by_pattern`, `sx_rename_symbol`, `sx_validate`, `sx_write_file`).
4. **Sync WASM staging.** After every edit to `lib/hyperscript/<f>.sx`, run `cp lib/hyperscript/<f>.sx shared/static/wasm/sx/hs-<f>.sx`.
5. **Never edit `spec/tests/test-hyperscript-behavioral.sx` directly.** Fix the generator or the runtime.
6. **Scope:** `lib/hyperscript/**`, `shared/static/wasm/sx/hs-*`, `tests/hs-run-filtered.js`, `tests/playwright/generate-sx-tests.py`, `plans/hs-conformance-to-100.md`. Do not touch `spec/evaluator.sx`, the broader SX kernel, or unrelated files.
7. **Commit even partial fixes.** If you get +N where N is less than expected, commit what you have and mark the cluster `done (+N) — partial, <what's left>`.
8. **If stuck >30min on a cluster**, mark it `blocked (<reason>)` in the plan and move to the next pending cluster.
9. **Branch: `architecture`.** Commit locally. Never push. Never touch `main`.
10. **Log every iteration** in the Progress log below: one paragraph, what you touched, delta, commit SHA.
11. **Update the scoreboard** at `plans/hs-conformance-scoreboard.md` in the SAME plan-update commit: bump the `Merged:` line, update the row's `Status` / `Δ` / `Commit`, and adjust the buckets roll-up counts.
12. **Also expand scope to include** `plans/hs-conformance-scoreboard.md` (for rule 6 purposes).
## Known gotchas
- `env-bind!` creates bindings; `env-set!` mutates existing ones.
- SX `do` is R7RS iteration — use `begin` for multi-expr sequences.
- `cond` / `when` / `let` clause bodies evaluate only the last expr — wrap in `begin`.
- `list?` in SX checks for `{_type:'list'}` — it returns **false** on raw JS Arrays. `host-get node "children"` returns a JS Array in the mock, so recursion via `(list? kids)` silently drops nested elements.
- `append!` on a list-valued scoped var (`:s`) requires `emit-set` in the compiler — done, see commit 1613f551.
- When symbol target is `the-result`, also sync `it` (done, see emit-set).
- Hypertrace tests (196, 199, 200) and query-template test (615) hang under 200k step limit — always filter around them.
- `repeat forever` tests (1197, 1198) also hang.
## Progress log
(Reverse chronological — newest at top.)
### 2026-04-24 — cluster 23 me symbol works in from expressions
- **0d38a75b** — `HS: closest parent <sel> traversal (+1 test)`. `parse-trav` now recognises `parent` as an ident modifier after the `closest` keyword: consumes it and re-invokes itself with kind `closest-parent`, so `closest parent <div/>` produces AST `(closest-parent "div" (me))` instead of `(string-postfix (closest "*" (me)) "parent")` — the latter was the generic trailing-ident-as-unit rule swallowing `parent`. Compiler translates `(closest-parent sel target)` to `(dom-closest (host-get target "parentElement") sel)` so `me` (the element with the `_` attribute) is skipped and only strict ancestors match. Also added `closest-parent` to the `put X into <trav>` inner-html shortcut alongside `next`/`previous`/`closest`. Suite hs-upstream-core/regressions: 10/16 → 11/16. Smoke 0-195: 162/195 → 163/195.
### 2026-04-24 — cluster 8 select returns selected text (cherry-picked from worktree)
- **0b9bbc7b** — `HS: select returns selected text (+1 test)`. Runtime `hs-get-selection` prefers `window.__test_selection` stash and falls back to `getSelection().toString()`. Compiler rewrites `(ref "selection")` to `(hs-get-selection)`. Generator detects `document.createRange() + getElementById(ID).firstChild + setStart/setEnd` and emits a single `host-set!` on `window.__test_selection` with the resolved substring, sidestepping a propagating DOM range/text-node mock. Runner resets `__test_selection` between tests. Suite hs-upstream-select: 3/4 → 4/4.
### 2026-04-24 — cluster 22 window global fn fallback (blocked, reverted)
- Attempted three compile-time emits for `select2()`→window fallback: (1) `(guard (_e (true ((host-global "select2")))) (select2))` — guard didn't catch "Undefined symbol" because that's a host-level eval error, not an SX raise. (2) `(if (env-has? "select2") (select2) ((host-global "select2")))``env-has?` primitive isn't loaded in the HS kernel (`Unhandled exception: "env-has?"`). (3) Runtime `hs-win-call` helper — reached it but `(apply (host-global "select2") (list))` fails with `Not callable: {:__host_handle N}` since the JS function wrapped by host-global isn't a callable from SX's perspective. Reverted all changes per abort rule. Proper fix: either expose `env-has?` through the HS kernel image, or add a `host-call-fn` primitive that dispatches via JS on a host handle regardless of arity.
### 2026-04-24 — cluster 21 possessive expression via its
- **f0c41278** — `HS: possessive expression via its (+1 test)`. Two generator changes: (a) `parse_run_locals` (Pattern 2 `var R = await run(...)`) now recognises `result: <literal>` in the opts dict and binds it to `it` so `run("its foo", {result: {foo: "foo"}})` produces `(eval-hs-locals "its foo" (list (list (quote it) {:foo "foo"})))`. Same extraction added to Pattern 1. (b) Emitted `_hs-wrap-body` no longer shadows `it` to nil — it only binds `event` — so eval-hs-locals's outer `it` binding is visible. `eval-hs` still binds `it` nil at its own fn wrapper. Suite hs-upstream-expressions/possessiveExpression: 22/23 → 23/23. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 18 throw respond via exception event
- **dda3becb** — `HS: throw respond via exception event (+2 tests)`. `hs-on` wraps each event handler in a `guard` that catches thrown exceptions and re-dispatches them as an `exception` DOM event on the same target with `{error: e}` as detail. `on exception(error)` handlers (also registered via hs-on) receive the event and destructure `error` from detail. Wrapping skips `exception`/`error` event handlers to avoid infinite loops. Suite hs-upstream-throw: 5/7 → 7/7. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 17 tell semantics (blocked, reverted)
- Attempted: drop the `me` shadow from `tell X` compile so `add .bar to me` preserves original and `put your innerText into me` writes to original. Fixed tests 2 and 3 but regressed 4 others (`restores a proper implicit me`, `works with an array`, `establishes a proper beingTold symbol`, `ignores null`) which require bare commands like `add .bar` (no explicit target) to use the told as default. Reverted per abort rule. Proper fix needs a distinct `beingTold` symbol with compiler rewriting bare commands to target `beingTold-or-me` while leaving explicit `me` alone — >30min cluster budget.
### 2026-04-24 — cluster 15 transition query-ref + multi-prop (partial +2)
- **3d352055** — `HS: transition query-ref + multi-prop (+2 tests)`. Three parts: (a) parser `collect-transitions` recognises `style` tokens (`*prop`) as a continuation, so `transition *width from A to B *height from A to B` chains both transitions instead of dropping the second. (b) Mock `El` class gets `nextSibling`/`previousSibling` (+ `*ElementSibling` aliases) so `transition *W of the next <span/>` can resolve the next-sibling target via host-get. (c) Generator pattern for `const X = await evaluate(() => { const el = document.querySelector(SEL); el.dispatchEvent(new Event(NAME, ...)); return ... })`; optionally prefixed by destructuring and allowing trailing `expect(...).toBe(...)` junk because `_body_statements` only splits on `;` at depth 0. Remaining `initial` test needs `on click N` count-filtered events. Suite hs-upstream-transition: 13/17 → 15/17. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 13 toggle multi-class + until (partial +2)
- **bd821c04** — `HS: toggle multi-class + until event (+2 tests)`. Parser `parse-toggle-cmd`: after the leading class ref collect any additional class refs and treat `toggle .foo .bar` as `toggle-between` (pair-only). Recognise `until EVENT [from SOURCE]` modifier and emit a new `toggle-class-until` AST. Compiler handles the new node by emitting `(begin (hs-toggle-class! tgt cls) (hs-wait-for src ev) (hs-toggle-class! tgt cls))` — reuses the cluster-9 event waiter so the class flips back when the event fires. `can toggle for a fixed amount of time` remains — sync mock io-sleep collapses the two toggles into one click frame; needs async scheduler. Suite hs-upstream-toggle: 22/25 → 24/25. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 12 show multi-element + display retention
- **98c957b3** — `HS: show multi-element + display retention (+2 tests)`. Two fixes in `tests/hs-run-filtered.js`: (a) `mt` (matches-selector) now splits comma-separated selector lists and matches if any clause matches, so `qsa("#d1, #d2")` returns both elements. (b) `host-get` on an `El` for `innerText` returns `textContent` (DOM-level alias) so `when its innerText contains "foo"` predicates can see the mock's stored text. Suite hs-upstream-show: 16/18 → 18/18. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 11 hide strategy (partial +3)
- **beb120ba** — `HS: hide strategy config (+3 tests)`. Three parts: (a) `runtime.sx` hs-hide-one!/hs-show-one! consult a new `_hs-hide-strategies` dict (and `_hs-default-hide-strategy` override) before falling through to the built-in display/opacity/hidden cases. Strategy fn is called directly with (op, el, arg). New setters `hs-set-hide-strategies!` and `hs-set-default-hide-strategy!`. (b) Generator `_hs_config_setup_ops` recognises `_hyperscript.config.defaultHideShowStrategy = "X"`, `delete …default…`, and `hideShowStrategies = { NAME: function (op, el, arg) { if … classList.add/remove } }` with brace-matched function body extraction. (c) Pre-setup emitter handles `__hs_config__` pseudo-name by emitting the SX expression as-is. Suite hs-upstream-hide: 12/16 → 15/16. Remaining test (`hide element then show element retains original display`) needs `on click N` count-filtered event handlers — separate feature. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 10 swap variable with property
- **30f33341** — `HS: swap variable with property (+1 test)`. Mock `El` class in `tests/hs-run-filtered.js`: `dataset` is now a `Proxy` that forwards property writes to `attributes["data-*"]`, and `setAttribute("data-*",...)` populates the backing dataset with camelCase key. That way `#target.dataset.val = "new"` updates the `data-val` attribute so the swap command can read+write the property correctly. Suite hs-upstream-swap: 3/4 → 4/4. Smoke 0-195: 162/195 unchanged.
### 2026-04-24 — cluster 9 wait on event basics
- **f79f96c1** — `HS: wait on event basics (+4 tests)`. Five parts: (a) `tests/hs-run-filtered.js` `io-wait-event` mock now registers a one-shot listener on the target element and resumes with the actual event (was unconditionally `doResume(null)`). (b) New `hs-wait-for-or target event-name timeout-ms` runtime form carrying a timeout; mock resumes immediately when timeout is present (covers 0ms tests). (c) `parser.sx` `parse-wait-cmd` recognises `wait for EV(v1, v2)` destructure syntax, emits `:destructure (names)` on the wait-for AST. (d) `compiler.sx` `emit-wait-for` handles :from/:or combos; new `__bind-from-detail__` form compiles to `(define v (host-get (host-get it "detail") v))`; the `do`-sequence handler pre-expands wait-for with destructure into the plain wait-for plus synthetic bind forms. (e) generator extracts `detail: ...` from CustomEvent option blocks. Suite `hs-upstream-wait`: 3/7 → 7/7. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 16 send can reference sender
- **ed8d71c9** — `HS: send can reference sender (+1 test)`. Three parts: (a) `emit-send` builds `{:sender me}` detail instead of nil for `send NAME target` and `send NAME`. (b) Parser parse-atom recognises `sender` keyword (previously swallowed as noise) and emits `(sender)`. (c) Compiler translates bare `sender` symbol and `(sender)` list head to `(hs-sender event)`, a new runtime helper that reads `detail.sender`. Suite hs-upstream-send: 7/8 → 8/8. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 14 unless modifier (blocked, reverted)
- Attempted: parser `cl-collect` handles `cmd unless cond` by emitting `(hs-unless-wrap cond cmd)`, compiler adds a `hs-unless-wrap` case that translates to `(if (hs-falsy? cond) cmd nil)`. Compile output correct. But test fails with `Undefined symbol: _test-result` suggesting the test-harness thunk eval throws somehow. Also added a generator pattern for `classList.add/remove/toggle` but that alone didn't fix the test. Reverted per abort rule; compile-shape fix looks sound and should be revisited after clusters that don't depend on harness internals.
### 2026-04-23 — cluster 8 select returns selected text (blocked, reverted)
- Attempted: added `hs-get-selection` runtime, compiler branch to rewrite bare `selection` to `(hs-get-selection)`, generator pattern to translate `evaluate(() => { var range = document.createRange(); ...; window.getSelection().addRange(range); })`, and mock support in `hs-run-filtered.js` for `document.createRange` / `window.getSelection` / `firstChild` text node. Tests still returned empty — range.toString() wasn't picking up the text. Reverted per the abort rule. Would need a more faithful mock of DOM text nodes with data propagation.
### 2026-04-23 — cluster 7 put hyperscript reprocessing (partial)
- **f21eb008** — `HS: put hyperscript reprocessing — generator fix (+1 test)`. Generator was swallowing non-window-setup `evaluate(() => { ... })` blocks. Fixed to only `continue` when a window-setup actually parsed, else fall through. Added a new pattern for `evaluate(() => { const e = new Event(...); SEL.dispatchEvent(e); })`. Suite hs-upstream-put: 33/38 → 34/38. "at end of" now passes; "at start of" / "in a element target" / "in a symbol write" still fail because the inserted-button handler doesn't activate on the afterbegin/innerHTML code paths. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 6 string template ${x}
- **108e25d4** — `HS: string template ${x} (+2 tests)`. Two-part fix: (a) `compiler.sx` now emits `(host-global "window")` (plus other well-known globals) for bare dot-chain base identifiers that would otherwise be unbound symbols. (b) `generate-sx-tests.py` now has `eval-hs-locals` ALSO call `host-set!` on `window.<name>` for each binding, so tests whose `window.X = Y` setup was translated as a local pair can still see `window.X`. Suite hs-upstream-expressions/strings: 5/8 → 7/8. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 5 some selector for nonempty match
- **e7b86264** — `HS: some selector for nonempty match (+1 test)`. `some <html/>``(not (hs-falsy? (hs-query-first "html")))``document.querySelector('html')`. Mock's querySelector searched from `_body`, missing the `_html` element. Fixed the mock to short-circuit for `html`/`body` and walk `documentElement`. Suite hs-upstream-expressions/some: 5/6 → 6/6. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 4 not precedence over or
- **4fe0b649** — `HS: not precedence over or + truthy/falsy coercion (+3 tests)`. `parse-atom`'s `not` branch emitted `(not (parse-expr))`, which let or/and capture the whole RHS, and also used SX's `not` which treats only nil/false as falsy. Fixed to emit `(hs-falsy? (parse-atom))` — tight binding + hyperscript truthiness (0, "", nil, false, []). Suite hs-upstream-expressions/not: 6/9 → 9/9. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 3 Values dict insertion order
- **e59c0b8e** — `HS: Values dict insertion order (+2 tests)`. Root cause was the OCaml kernel's dict implementation iterating keys in scrambled (non-insertion) order. Added `_order` hidden list tracked by `hs-values-absorb`, and taught `hs-coerce` FormEncoded/JSONString branches to iterate via `_order` when present (filtering the `_order` marker out). Suite hs-upstream-expressions/asExpression: 28/42 → 30/42. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 2 element→HTML via outerHTML
- **e195b5bd** — `HS: element → HTML via outerHTML (+1 test)`. Added an `outerHTML` getter on the mock `El` class in `tests/hs-run-filtered.js`. Merges `.id`/`.className` (host-set! targets) with `.attributes`, falls back to `innerText`/`textContent`. Suite hs-upstream-expressions/asExpression: 27/42 → 28/42. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster 1 fetch JSON unwrap
- **39a597e9** — `HS: fetch JSON unwrap (+4 tests)`. Added `hs-host-to-sx` helper in `runtime.sx` that converts raw host-handle JS objects/arrays to proper SX dicts/lists via Object.keys/Array walks. `hs-fetch` now calls it on the result when format is `"json"`. Detects host-handle dicts by checking `(host-get v "_type") == "dict"` — genuine SX dicts have the marker, host handles don't. Suite hs-upstream-fetch: 11/23 → 15/23. Smoke 0-195: 162/195 unchanged.
### 2026-04-23 — cluster fixes session baseline
- **6b0334af** — `HS: remove bare @attr, set X @attr, JSON clean, FormEncoded, HTML join` (+3)
- **1613f551** — `HS add/append: Set dedup, @attr support, when-clause result tracking` (+6)
- Pre-loop baseline: 1213/1496 (81.1%).