From c22f553146ac3c1f25c201a59a533e3ff9f368c6 Mon Sep 17 00:00:00 2001
From: giles <giles.bradshaw@rose-ash.com>
Date: Fri, 24 Apr 2026 09:08:15 +0000
Subject: [PATCH] plan: update progress log with session 3 summary, Math 39.6%
 wide 36.4%

---
 lib/js/test262-scoreboard.json | 148 ++++++++++++++++++++++++++-------
 lib/js/test262-scoreboard.md   |  49 ++++++++---
 plans/js-on-sx.md              |  23 +++++
 3 files changed, 179 insertions(+), 41 deletions(-)

diff --git a/lib/js/test262-scoreboard.json b/lib/js/test262-scoreboard.json
index 1653fbc9..a384868c 100644
--- a/lib/js/test262-scoreboard.json
+++ b/lib/js/test262-scoreboard.json
@@ -1,69 +1,161 @@
 {
   "totals": {
-    "pass": 67,
-    "fail": 204,
-    "skip": 39,
-    "timeout": 17,
-    "total": 327,
-    "runnable": 288,
-    "pass_rate": 23.3
+    "pass": 164,
+    "fail": 257,
+    "skip": 1447,
+    "timeout": 29,
+    "total": 1897,
+    "runnable": 450,
+    "pass_rate": 36.4
   },
   "categories": [
     {
       "category": "built-ins/Math",
       "total": 327,
-      "pass": 67,
-      "fail": 204,
-      "skip": 39,
-      "timeout": 17,
-      "pass_rate": 23.3,
+      "pass": 55,
+      "fail": 91,
+      "skip": 177,
+      "timeout": 4,
+      "pass_rate": 36.7,
       "top_failures": [
         [
-          "ReferenceError (undefined symbol)",
-          94
+          "TypeError: not a function",
+          46
         ],
         [
           "Test262Error (assertion failed)",
-          79
+          44
+        ],
+        [
+          "Timeout",
+          4
+        ],
+        [
+          "ReferenceError (undefined symbol)",
+          1
+        ]
+      ]
+    },
+    {
+      "category": "built-ins/Number",
+      "total": 340,
+      "pass": 67,
+      "fail": 75,
+      "skip": 190,
+      "timeout": 8,
+      "pass_rate": 44.7,
+      "top_failures": [
+        [
+          "Test262Error (assertion failed)",
+          66
+        ],
+        [
+          "Timeout",
+          8
+        ],
+        [
+          "ReferenceError (undefined symbol)",
+          4
+        ],
+        [
+          "SyntaxError (parse/unsupported syntax)",
+          3
         ],
         [
           "TypeError: not a function",
-          30
+          1
+        ]
+      ]
+    },
+    {
+      "category": "built-ins/String",
+      "total": 1223,
+      "pass": 42,
+      "fail": 91,
+      "skip": 1073,
+      "timeout": 17,
+      "pass_rate": 28.0,
+      "top_failures": [
+        [
+          "Test262Error (assertion failed)",
+          62
         ],
         [
           "Timeout",
           17
         ],
         [
-          "Unhandled: Not callable: {:random <js-math-random()> :trunc <js-math-tr",
-          1
+          "ReferenceError (undefined symbol)",
+          11
+        ],
+        [
+          "TypeError: not a function",
+          7
+        ],
+        [
+          "SyntaxError (parse/unsupported syntax)",
+          2
         ]
       ]
+    },
+    {
+      "category": "built-ins/StringIteratorPrototype",
+      "total": 7,
+      "pass": 0,
+      "fail": 0,
+      "skip": 7,
+      "timeout": 0,
+      "pass_rate": 0.0,
+      "top_failures": []
     }
   ],
   "top_failure_modes": [
-    [
-      "ReferenceError (undefined symbol)",
-      94
-    ],
     [
       "Test262Error (assertion failed)",
-      79
+      172
     ],
     [
       "TypeError: not a function",
-      30
+      54
     ],
     [
       "Timeout",
-      17
+      29
     ],
     [
-      "Unhandled: Not callable: {:random <js-math-random()> :trunc <js-math-tr",
+      "ReferenceError (undefined symbol)",
+      16
+    ],
+    [
+      "SyntaxError (parse/unsupported syntax)",
+      5
+    ],
+    [
+      "Unhandled: Not callable: {:entries <js-object-entries(o)> :defineProper",
+      3
+    ],
+    [
+      "Unhandled: Not callable: \\\\\\",
+      2
+    ],
+    [
+      "Unhandled: Not callable: {:__proto__ {}} (kont=4 frames)\\",
+      2
+    ],
+    [
+      "Unhandled: Not callable: {:__proto__ {}} (kont=5 frames)\\",
+      1
+    ],
+    [
+      "Unhandled: Not callable: {:__proto__ {}} (kont=6 frames)\\",
+      1
+    ],
+    [
+      "Unhandled: Not callable: {:__proto__ {}} (kont=9 frames)\\",
       1
     ]
   ],
   "pinned_commit": "d5e73fc8d2c663554fb72e2380a8c2bc1a318a33",
-  "elapsed_seconds": 426.2,
-  "workers": 2
+  "elapsed_seconds": 582.5,
+  "workers": 1
 }
\ No newline at end of file
diff --git a/lib/js/test262-scoreboard.md b/lib/js/test262-scoreboard.md
index 4002a705..1d7559cc 100644
--- a/lib/js/test262-scoreboard.md
+++ b/lib/js/test262-scoreboard.md
@@ -1,30 +1,53 @@
 # test262 scoreboard
 
 Pinned commit: `d5e73fc8d2c663554fb72e2380a8c2bc1a318a33`
-Wall time: 426.2s
+Wall time: 582.5s
 
-**Total:** 67/288 runnable passed (23.3%). Raw: pass=67 fail=204 skip=39 timeout=17 total=327.
+**Total:** 164/450 runnable passed (36.4%). Raw: pass=164 fail=257 skip=1447 timeout=29 total=1897.
 
 ## Top failure modes
 
-- **94x** ReferenceError (undefined symbol)
-- **79x** Test262Error (assertion failed)
-- **30x** TypeError: not a function
-- **17x** Timeout
-- **1x** Unhandled: Not callable: {:random <js-math-random()> :trunc <js-math-tr
+- **172x** Test262Error (assertion failed)
+- **54x** TypeError: not a function
+- **29x** Timeout
+- **16x** ReferenceError (undefined symbol)
+- **5x** SyntaxError (parse/unsupported syntax)
+- **3x** Unhandled: Not callable: {:entries <js-object-entries(o)> :defineProper
+- **2x** Unhandled: Not callable: \\\
+- **2x** Unhandled: Not callable: {:__proto__ {}} (kont=4 frames)\
+- **1x** Unhandled: Not callable: {:__proto__ {}} (kont=5 frames)\
+- **1x** Unhandled: Not callable: {:__proto__ {}} (kont=6 frames)\
+- **1x** Unhandled: Not callable: {:__proto__ {}} (kont=9 frames)\
 
 ## Categories (worst pass-rate first, min 10 runnable)
 
 | Category | Pass | Fail | Skip | Timeout | Total | Pass % |
 |---|---:|---:|---:|---:|---:|---:|
-| built-ins/Math | 67 | 204 | 39 | 17 | 327 | 23.3% |
+| built-ins/String | 42 | 91 | 1073 | 17 | 1223 | 28.0% |
+| built-ins/Math | 55 | 91 | 177 | 4 | 327 | 36.7% |
+| built-ins/Number | 67 | 75 | 190 | 8 | 340 | 44.7% |
 
 ## Per-category top failures (min 10 runnable, worst first)
 
-### built-ins/Math  (67/288 — 23.3%)
+### built-ins/String  (42/150 — 28.0%)
 
-- **94x** ReferenceError (undefined symbol)
-- **79x** Test262Error (assertion failed)
-- **30x** TypeError: not a function
+- **62x** Test262Error (assertion failed)
 - **17x** Timeout
-- **1x** Unhandled: Not callable: {:random <js-math-random()> :trunc <js-math-tr
+- **11x** ReferenceError (undefined symbol)
+- **7x** TypeError: not a function
+- **2x** SyntaxError (parse/unsupported syntax)
+
+### built-ins/Math  (55/150 — 36.7%)
+
+- **46x** TypeError: not a function
+- **44x** Test262Error (assertion failed)
+- **4x** Timeout
+- **1x** ReferenceError (undefined symbol)
+
+### built-ins/Number  (67/150 — 44.7%)
+
+- **66x** Test262Error (assertion failed)
+- **8x** Timeout
+- **4x** ReferenceError (undefined symbol)
+- **3x** SyntaxError (parse/unsupported syntax)
+- **1x** TypeError: not a function
diff --git a/plans/js-on-sx.md b/plans/js-on-sx.md
index 22d31741..1cb66f61 100644
--- a/plans/js-on-sx.md
+++ b/plans/js-on-sx.md
@@ -201,6 +201,29 @@ Append-only record of completed iterations. Loop writes one line per iteration:
 
 - 2026-04-23 — **Rest + rename in destructure, delete operator, Array.prototype / String.prototype / Number.prototype stubs, lastIndexOf, typeof fix, js-apply-fn handles callable dicts.** Array destructure `[a, ...rest]` transpiles rest-tail to `(js-list-slice tmp i (len tmp))`. Obj pattern `{key: local}` renames to `local`. `delete obj.k` → `js-delete-prop` which sets value to undefined. `Array.prototype.push` etc. are accessible as proto-functions that route through `js-this` + `js-invoke-method`. `Number.prototype` stub with `toString/valueOf/toFixed`. Nested destructuring patterns tolerated via `jp-skip-balanced` (treated as holes). Destructuring params in fn decls accepted (holes). **Final Math scoreboard: 66/288 (22.9%)** vs 56/288 (19.4%) baseline, +10 passes (+3.5 percentage points). 446/448 unit (438→+8). 148/148 slice unchanged. Top remaining Math failures: 94× ReferenceError (`Math.log`/`Math.sin`/`Math.cos` etc. not shimmed — no SX `sin`/`cos`/`log` primitives), 79× assertion-fail (numerical precision on `Math.floor` / `ceil` / `trunc` edge cases), 31× TypeError, 16× Timeout.
 
+- 2026-04-23 (session 3) — **Parallel runner, 60 new features, Math 39.6%, wide 36.4%.** Commits 65d4c706..edfbb754:
+  1. `test262-runner.py` rewritten with `multiprocessing.Pool` for `--workers N` shards; raw-fd line buffer replaces thread-per-line. Auto-defaults 1 worker on <=2-core machines (parallel slower on this box — OCaml CPU-bound, 2 processes starve). Classifier maps parser errors to SyntaxError so negative-SyntaxError tests pass instead of failing.
+  2. `Function.prototype.call/apply/bind` via `js-invoke-function-method`, dispatched in `js-invoke-method` when recv is a function. `fn.name/.length` also exposed.
+  3. Numeric keys in object literals stringify on parse (`{0: 41, 1: 42}` no longer crashes `dict-set!`). Parser: number token value str-coerced.
+  4. Array-like receivers for `Array.prototype.X.call(dict)` via `js-arraylike-to-list` — reads `length` + indexed keys in order. `js-iterable-to-list` also respects `length` on dicts.
+  5. **Number methods on primitives**: `(5).toString()`, `(16).toString(16)`, `.toFixed(n)`, `.valueOf()`. `js-invoke-method` branches on `(number? recv)`. Radix 2-36 supported via `js-num-to-str-radix`.
+  6. **Boolean methods**: `true.toString()`, `.valueOf()`.
+  7. **NaN / Infinity resolve**: transpile-time rewrite `NaN → (js-nan-value)` and `Infinity → (js-infinity-value)`, because SX's tokenizer parses `NaN` as numeric literal and forbids `(define NaN ...)`. `js-number-is-nan` uses string-inspect (SX `(= nan nan)` returns true). `js-strict-eq` returns false for NaN pairs per spec.
+  8. 15 new Array.prototype methods: `at`, `flatMap`, `findLast`, `findLastIndex`, `reduceRight`, `toString`, `toLocaleString`, `keys`, `values`, `entries`, `copyWithin`, `toReversed`, `toSorted`. Mutating `unshift`/`splice` are stubs (pop-last!/pop-first! primitives are no-ops — runtime limitation).
+  9. 10 new String.prototype methods: `at`, `codePointAt`, `lastIndexOf`, `localeCompare`, `replaceAll`, `normalize`, `toLocaleLowerCase/UpperCase`, `isWellFormed`, `toWellFormed`.
+  10. 10 new Object.* globals: `getPrototypeOf`, `setPrototypeOf`, `create`, `defineProperty(ies)`, `getOwnPropertyNames/Descriptor(s)`, `isExtensible/Frozen/Sealed`, `seal`, `preventExtensions`, `is`, `fromEntries`, `hasOwn`.
+  11. `Array.prototype` / `String.prototype` dicts updated to include all new methods (so `.call`-ing them works).
+  12. `js-to-number(undefined) → NaN` (was 0); `js-string-to-number("abc") → NaN` via new `js-is-numeric-string?`. `parseInt('123abc',10) → 123` (new digit-walker), supports radix 2-36. `parseFloat('3.14xyz') → 3.14` (new float-prefix matcher). Added `encodeURIComponent`, `decodeURIComponent`, `encodeURI`, `decodeURI`.
+  13. Harness stub: `assert` itself callable via `assert.__callable__ = __assert_call__` (many tests do `assert(cond, msg)`). `verifyNotWritable` etc. widened to 5-arg signature.
+  14. `Number` global rebuilt: correct `MAX_VALUE` (computed at load by doubling until `== Infinity`, yields ~1e308), `POSITIVE_INFINITY/NEGATIVE_INFINITY/NaN` via function-form values (SX literals overflow/mangle), `toFixed` handles NaN/Infinity/negative, `prototype.toString` accepts radix.
+  15. **Scoreboard deltas**: Math 66/288 (22.9%) → 114/288 (39.6%) +48 passes. Wide (Math+Number+String at 150 each): 164/450 (36.4%). Number category isolated: 44.7%. Unit 514/516 (506→+8 from NaN/coerce/Object tests).
+
+  Top remaining failure modes (wide scoreboard, 450 runnable):
+  - 172× Test262Error (assertion failed) — real semantic bugs, numeric precision on Math/Number/String.prototype
+  - 54× TypeError: not a function
+  - 29× Timeout (slow string/regex loops)
+  - 16× ReferenceError — still some missing globals
+
 ## Phase 3-5 gotchas
 
 Worth remembering for later phases: