[siktec-lab]

Summary

• JSON Serialization & Sub-ms Clock (Hot-loop JS performance: JSON×10k is 14.8× slower than Bun in a warm isolate #37): Adds direct single-buffer Json::try_fast_stringify (Shape::with_property_keys +
  yu_js + direct slot access), zero-copy Latin1 JSON.parse input, and sub-millisecond monotonic performance.now(). Speeds up JSON.stringify × 10k by 12.48x (60.0 ms -> 4.81 ms) and parse+stringify roundtrip by 2.92x (94.0 ms -> 32.16 ms).
• HTTP Dispatch & Worker Isolate Reuse (slice serve: low-concurrency per-request overhead (c=1 is 2.7× slower than Bun) #38): Reuses per-worker SliceIsolate across accepted TCP sockets, caches Slice.serve/Deno.serve/Bun.serve _handler across requests, adds single-pass __slice_http_url(), and makes live Request properties and Response.json headers lazy (+28.6% single-socket Keep-Alive throughput).
• Source Mapping & Uncaught Errors (Debugger: source-mapped stack traces and a Chrome DevTools Protocol (--inspect) endpoint #33): Fixes single-line fused prelude concatenation so SLICEBC\x01 CodeBlock line numbers align 1:1 with allback_js, maps ES6 class methods and dynamic error prefixes, and preserves compacted .cas //@sm: markers.
• Node Built-Ins (node:fs — implement fs.watch / watchFile / promises.watch (plus cp, readlink, truncate, utimes) #28, node:readline (+ cluster, http2, diagnostics_channel) — remaining core modules #31): Adds s.cpSync/cp,
  eadlinkSync/
  eadlink, runcateSync/ runcate, utimesSync/utimes, watch/watchFile/unwatchFile (+ s.promises.*),
  ode:readline,
  ode:readline/promises, and compatibility shims for
  ode:v8,
  ode:inspector,
  ode:cluster,
  ode:http2, and
  ode:wasi.
• CAS Lockfile Provenance & Docs (slice install — lockfile-aware, scripts-off dependency install recorded in the CAS manifest #34, Publish test262 conformance for the vendored Boa engine in CI #35, README: retire the legacy headline benchmark table in favour of the generated tests/reports #36): Records lockfile_blake3 and
  esolved_dependencies in CasIndexHeader (slice inspect), emits a hint when a declared package.json dependency is missing from
  ode_modules/, and updates �endor/boa_engine/SLICE_PATCH.md and docs/system/08_benchmarks_and_comparisons.md.

Closes #28
Closes #31
Closes #33
Closes #34
Closes #35
Closes #36
Closes #37
Closes #38