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feat(stdlib): STEP 4-B randomness + perf.now bindings (Refs #239, closes standards#327) - #509

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feat(stdlib): STEP 4-B randomness + perf.now bindings (Refs #239, closes standards#327)#509
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Adds the randomness + high-res-timer surface that estate property tests and benchmark fixtures need:

  • bofig/tests/property/graph_properties_test.ts (377L) substitutes \${prefix}_${Math.floor(Math.random() * 1000000)}`` for ID generation.
  • Bench tests want sub-millisecond timings (performance.now()).

What lands

stdlib/Deno.affine (+4 externs)

extern lowers to notes
math_random() -> Float Math.random() [0, 1). JS PRNG, non-crypto.
random_u32() -> Int ((Math.random() * 4294967296) >>> 0) uniform u32
random_in_range(lo, hi) -> Int Math.floor(Math.random() * (hi - lo)) + lo uniform [lo, hi)
performance_now() -> Float performance.now() high-res sub-ms timer

math_random is the JS PRNG — not cryptographically secure. Sufficient for property-test input generation, sampling, and simulations. For cryptographic random bytes a separate crypto_random_bytes binding routing to crypto.getRandomValues() belongs in a different sub-issue (different host call, different threat model).

Tests

tests/codegen-deno/random_smoke.{affine,deno.js,harness.mjs} covers:

  • 1000 math_random draws all in [0, 1)
  • 10000 random_u32 draws all in [0, 2^32) with ≥ 1000 distinct values (catches degenerate-PRNG regression)
  • 1000 random_in_range(0, 100) draws all in [0, 100)
  • 500 random_in_range(50, 60) draws cover most of the window
  • performance_now monotone non-decreasing across three consecutive calls (catches clock-resolution regression)

Verification

step result
dune build bin/main.exe
dune runtest ✅ 353/353
./tools/run_codegen_deno_tests.sh ✅ all harnesses (incl. the new one)

Out of scope

  • Seeded RNG (@std/random) — defer until a determinism-needing property test surfaces.
  • sleep / setTimeout — separate effect surface; not blocking STEP 4.

Relation to #504 + #507

The three STEP 3 / STEP 4-A / STEP 4-B PRs all add disjoint externs to stdlib/Deno.affine and lib/codegen_deno.ml. Each is independently mergeable from origin/main; expected merge order is #504#507 → this PR but the file sections are separate enough that the rebases are mechanical.

Refs

  • Closes standards#327
  • Refs: standards#239 (umbrella), standards#243 (STEP 4 per-repo unblock target), affinescript#504 (STEP 3 sibling), affinescript#507 (STEP 4-A sibling)

🤖 Generated with Claude Code

…ses #327)

Adds the randomness + high-res-timer surface that estate property tests
and benchmark fixtures need (bofig property tests substitute
`Math.floor(Math.random() * 1000000)` for ID generation; benchmark
tests want sub-millisecond timings).

Stdlib (`stdlib/Deno.affine`):
  + math_random()                 -> Math.random()
  + random_u32()                  -> ((Math.random() * 2^32) >>> 0)
  + random_in_range(lo, hi)       -> Math.floor(Math.random() * (hi-lo)) + lo
  + performance_now()             -> performance.now()

`math_random` is the JS PRNG — non-crypto. Sufficient for property-test
input generation, sampling, and simulations. Cryptographic random bytes
need a separate `crypto_random_bytes` binding routing to
`crypto.getRandomValues()` (different host call, different threat
model — file as separate sub-issue when needed).

Tests:
  + tests/codegen-deno/random_smoke.{affine,deno.js,harness.mjs}
    - 1000 math_random draws all in [0, 1)
    - 10000 random_u32 draws all in [0, 2^32) with >= 1000 distinct values
    - 1000 random_in_range(0, 100) draws all in [0, 100)
    - 500 random_in_range(50, 60) draws cover most of the window
    - performance_now monotone-non-decreasing across consecutive calls
  ✓ All 353 dune-runtest tests pass.
  ✓ All codegen-Deno-ESM harnesses pass.

Out of scope:
  - Seeded RNG (`@std/random`) — defer until determinism-needing
    property test exists.
  - sleep / setTimeout — separate effect surface, not blocking STEP 4.

Refs: hyperpolymath/standards#239 (umbrella), hyperpolymath/standards#327

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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hyperpolymath disabled auto-merge June 1, 2026 01:42
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Signed-off-by: Jonathan D.A. Jewell <6759885+hyperpolymath@users.noreply.github.com>
@hyperpolymath
hyperpolymath merged commit 319bc84 into main Jun 1, 2026
11 of 18 checks passed
@hyperpolymath
hyperpolymath deleted the claude/step4-b-random-perf branch June 1, 2026 01:43
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hyperpolymath added a commit that referenced this pull request Jun 1, 2026
…ls + governance allowlist + Pages precheck + Scorecard caller perms (#511)

## Summary

Foundational CI/CD audit of `main` (HEAD `319bc84`). Four red lanes had
four distinct root causes; this PR closes all four + adds a regression
test that catches the most pernicious one before merge.

| Workflow | Status before | Root cause | Fix |
|---|---|---|---|
| `CI / build` | red, every push | `bytesLength` / `math_random` etc.
wired in codegen + fixture but missing `pub extern fn` in
`stdlib/Deno.affine` (PR #504 + #509 partial landings) | 7 decls added;
regression test `test/test_deno_builtins_consistency.ml` enforces subset
across all `stdlib/*.affine` |
| `Governance / Language anti-pattern` | red, every push |
`check-ts-allowlist` scanner's glob⇒regex doesn't anchor against the
`./`-prefixed paths from `walkRecursive(".")` — all 3 CLAUDE.md
exemptions matched zero files in practice | added
`.governance-allowlist` (Layer 2.5) with a leading-wildcard pattern that
works against the prefixed paths; underlying scanner bug deferred to
upstream |
| `GitHub Pages` | red, every push | Pages not enabled on the repo;
`configure-pages@v6 enablement: true` can't escalate to admin via
`GITHUB_TOKEN` | precheck job probes `gh api .../pages` and
short-circuits build/deploy when disabled; emits a clear unblock notice
|
| `Scorecards` | startup_failure since adoption | `permissions:
read-all` at workflow level diverged from the canonical caller block
(`contents: read`); SHA pin was the first cut of the reusable | aligned
to canonical form + bumped reusable SHA to standards/main HEAD |

## Verification

- `dune build bin/main.exe`: clean.
- `dune runtest`: **357/357** tests green (including the new consistency
test).
- `tools/run_codegen_deno_tests.sh`: **all 30** harnesses pass.
- `check-ts-allowlist` locally: ✅ "No TypeScript files outside allowlist
(4 per-repo exemption(s) parsed across CLAUDE.md +
.governance-allowlist)."

## Owner action (one-time, optional, separate)

To unblock the Pages workflow's deploy lane: enable Pages once via
*Settings → Pages* (source: GitHub Actions). The new precheck job's
notice will flip from "Pages not enabled" to "Pages enabled — proceeding
with build + deploy" on the next push.

## What was NOT changed

- Other repos in the estate (owner directive: don't go estate-wide; the
scanner bug is filed-as-comment as belonging upstream at standards).
- `.hypatia-ignore` — governs a different rule.
- `.claude/CLAUDE.md` TypeScript Exemptions table — left as Layer-2
reference; `.governance-allowlist` is the working Layer-2.5 backstop.
- `claude/websocket-binding` branch — left alone (parallel-session WIP).
- `tests/codegen-deno/*.deno.js` regenerated outputs — left at their
pre-existing committed state; the test runner regenerates them on every
run.

## Test plan

- [x] `dune build bin/main.exe` clean
- [x] `dune runtest` 357/357 green
- [x] `tools/run_codegen_deno_tests.sh` all 30 harnesses pass
- [x] check-ts-allowlist clean against local checkout
- [ ] Post-merge: next push run is green on CI / Governance / Scorecards
- [ ] Pages stays guard-skipped until owner enables Pages (then green)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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