diff --git a/CLAUDE.md b/CLAUDE.md
index 224516d46d..01f00e3a4b 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -8,7 +8,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 Perry is a native TypeScript compiler written in Rust that compiles TypeScript source code directly to native executables. It uses SWC for TypeScript parsing and LLVM for code generation.
 
-**Current Version:** 0.5.1300
+**Current Version:** 0.5.1301
 
 
 ## TypeScript Parity Status
diff --git a/Cargo.lock b/Cargo.lock
index acec9fe48f..8fda8abac7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5547,7 +5547,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
 [[package]]
 name = "perry"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "base64",
@@ -5607,14 +5607,14 @@ dependencies = [
 
 [[package]]
 name = "perry-api-manifest"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "perry-audio-miniaudio"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "cc",
  "libc",
@@ -5622,7 +5622,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "inkwell",
@@ -5639,7 +5639,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-arkts"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5647,7 +5647,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-glance"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5655,7 +5655,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-js"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-dispatch",
@@ -5664,7 +5664,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-swiftui"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5672,7 +5672,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wasm"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "base64",
@@ -5684,7 +5684,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wear-tiles"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5692,7 +5692,7 @@ dependencies = [
 
 [[package]]
 name = "perry-container-compose"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -5721,14 +5721,14 @@ dependencies = [
 
 [[package]]
 name = "perry-container-e2e"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
 ]
 
 [[package]]
 name = "perry-diagnostics"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "serde",
  "serde_json",
@@ -5736,7 +5736,7 @@ dependencies = [
 
 [[package]]
 name = "perry-dispatch"
-version = "0.5.1300"
+version = "0.5.1301"
 
 [[package]]
 name = "perry-doc-fixture-my-bindings"
@@ -5747,7 +5747,7 @@ dependencies = [
 
 [[package]]
 name = "perry-doc-tests"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "clap",
@@ -5762,7 +5762,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ads"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "block2",
  "objc2",
@@ -5772,7 +5772,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-argon2"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "argon2",
  "perry-ffi",
@@ -5780,7 +5780,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-axios"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "reqwest",
@@ -5789,7 +5789,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-bcrypt"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "bcrypt",
  "perry-ffi",
@@ -5797,7 +5797,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-better-sqlite3"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "rusqlite",
@@ -5805,7 +5805,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cheerio"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "scraper",
@@ -5813,7 +5813,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-commander"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5821,7 +5821,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cron"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "chrono",
  "cron",
@@ -5831,7 +5831,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dayjs"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5839,7 +5839,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-decimal"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "rust_decimal",
@@ -5847,7 +5847,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dotenv"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "serde_json",
@@ -5855,7 +5855,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ethers"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "rand 0.10.1",
@@ -5863,7 +5863,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-events"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5871,14 +5871,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-exponential-backoff"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-fastify"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "bytes",
  "http-body-util",
@@ -5896,7 +5896,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-fetch"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "bytes",
  "lazy_static",
@@ -5909,7 +5909,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-http"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "bytes",
  "h2",
@@ -5933,7 +5933,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ioredis"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -5943,7 +5943,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-jsonwebtoken"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "jsonwebtoken",
@@ -5954,7 +5954,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-lru-cache"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "lru",
  "perry-ffi",
@@ -5963,7 +5963,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-moment"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5971,7 +5971,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mongodb"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "bson",
  "futures-util",
@@ -5983,7 +5983,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mysql2"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5993,7 +5993,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nanoid"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "nanoid",
  "perry-ffi",
@@ -6002,7 +6002,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-net"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "bytes",
  "perry-ffi",
@@ -6015,7 +6015,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-node-forge"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "const-oid 0.9.6",
  "der 0.7.10",
@@ -6034,7 +6034,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nodemailer"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "lettre",
  "perry-ffi",
@@ -6044,7 +6044,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pdf"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "printpdf",
@@ -6052,7 +6052,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pg"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "sqlx",
@@ -6061,7 +6061,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ratelimit"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "governor",
  "perry-ffi",
@@ -6069,7 +6069,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-sharp"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "fast_image_resize",
  "image",
@@ -6079,14 +6079,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-slugify"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-streams"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -6095,7 +6095,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-undici"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6104,7 +6104,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-uuid"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "uuid",
@@ -6112,7 +6112,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-validator"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ffi",
  "regex",
@@ -6122,7 +6122,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ws"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "futures-util",
  "lazy_static",
@@ -6135,7 +6135,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-zlib"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "brotli",
  "flate2",
@@ -6145,7 +6145,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ffi"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "dashmap",
  "once_cell",
@@ -6154,7 +6154,7 @@ dependencies = [
 
 [[package]]
 name = "perry-hir"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-api-manifest",
@@ -6172,7 +6172,7 @@ dependencies = [
 
 [[package]]
 name = "perry-parser"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-diagnostics",
@@ -6184,7 +6184,7 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "base64",
@@ -6226,14 +6226,14 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime-static"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-runtime",
 ]
 
 [[package]]
 name = "perry-stdlib"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "aes 0.8.4",
  "aes 0.9.1",
@@ -6328,14 +6328,14 @@ dependencies = [
 
 [[package]]
 name = "perry-stdlib-static"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-stdlib",
 ]
 
 [[package]]
 name = "perry-transform"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -6344,14 +6344,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ui"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ui-model",
 ]
 
 [[package]]
 name = "perry-ui-android"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "itoa",
@@ -6368,7 +6368,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-geisterhand"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "rand 0.10.1",
  "serde",
@@ -6378,7 +6378,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-gtk4"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "cairo-rs 0.22.0",
@@ -6401,7 +6401,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-ios"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "block2",
@@ -6417,7 +6417,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-macos"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "block2",
@@ -6432,7 +6432,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-model"
-version = "0.5.1300"
+version = "0.5.1301"
 
 [[package]]
 name = "perry-ui-test"
@@ -6443,11 +6443,11 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-testkit"
-version = "0.5.1300"
+version = "0.5.1301"
 
 [[package]]
 name = "perry-ui-tvos"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "block2",
@@ -6463,7 +6463,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-visionos"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "block2",
@@ -6479,7 +6479,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-watchos"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "block2",
  "libc",
@@ -6492,7 +6492,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "base64",
  "libc",
@@ -6509,14 +6509,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows-winui"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "perry-ui-windows",
 ]
 
 [[package]]
 name = "perry-updater"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "anyhow",
  "base64",
@@ -6532,7 +6532,7 @@ dependencies = [
 
 [[package]]
 name = "perry-wasm-host"
-version = "0.5.1300"
+version = "0.5.1301"
 dependencies = [
  "wasmi",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 48c44288a0..ac8f0975ff 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -315,7 +315,7 @@ codegen-units = 16
 codegen-units = 16
 
 [workspace.package]
-version = "0.5.1300"
+version = "0.5.1301"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"
diff --git a/changelog.d/7534-plan-baseline-1299.md b/changelog.d/7534-plan-baseline-1299.md
new file mode 100644
index 0000000000..298eaa0aed
--- /dev/null
+++ b/changelog.d/7534-plan-baseline-1299.md
@@ -0,0 +1,22 @@
+### Docs: engine plan carries the full v0.5.1299 baseline, and a re-ordered backlog
+
+The plan's performance backlog was materially stale: its worst row was
+`json_parse_1mb` at 6.27x, and it did not list `object_deep_clone` or
+`promise_all_chains` at all — because until #7495 and #7516/#7529 landed, those
+two kernels **crashed** rather than ran.
+
+Replaced with all twelve app-pattern kernels measured on the pinned quiet mini
+at v0.5.1299 (AC power, CPU-quiet gate, node 22.23.1 / bun 1.3.14, 11 runs per
+cell), plus the JSON polyglot legs. Two findings drive a re-ordering:
+
+- **`object_deep_clone` is 37.5x bun** (657 ms vs 17.5 ms) — the worst cell by
+  3x over the next, and never before measurable. Now #7533, and first in the
+  queue with a profile-first instruction.
+- **The JSON lazy tape is a net negative on scans**: the optimized build is
+  2.2x slower than the unoptimized one on `field_access` (2984 ms vs 1350 ms)
+  with 3.6x the RSS, while remaining a 6.8x win on `roundtrip` (192 ms, beating
+  bun's 216 and node's 379 and within ~8% of Rust serde_json). #7478.
+
+`#7502` (nine shipped-lowering mechanics with no assertion anywhere) is added
+to the ordering explicitly: today's ~20 rooting bugs were all found by hand
+with `PERRY_GC_PROTECT_FROMSPACE`, because nothing else can find them.
diff --git a/docs/engine-plan.md b/docs/engine-plan.md
index cd68d47526..4832078d11 100644
--- a/docs/engine-plan.md
+++ b/docs/engine-plan.md
@@ -6,7 +6,7 @@
 every dated status section, incident narrative and superseded sequencing lives
 in [`engine-plan-history.md`](engine-plan-history.md); this file holds only the
 current state and the remaining work so it stays readable across context loads.
-Last synced **2026-08-06** (repsel status corrected same day: 4b was already merged).
+Last synced **2026-08-06**, after the v0.5.1299 public-baseline sweep.
 
 | Concern | Detail lives in |
 |---|---|
@@ -84,23 +84,49 @@ be by-construction (`expr_produces_non_pointer_bits_by_construction`), and
 #7501 found that even a static layout *declaration* gets revoked at runtime, so
 collector-facing metadata needs a live header test at the store.
 
-### Performance backlog (public-baseline sweep, 2026-08-06, quiet host)
-
-Pinned Node v22.23.1 / Bun 1.3.14, 11 runs per cell. Worst-first vs bun:
-
-| row | ratio | workstream |
-|---|--:|---|
-| `json_parse_1mb` | 6.27× | JSON parser speed (shared with tape) |
-| `map_1m` | 5.74× | Map internals |
-| `batch` | 5.29× | app-pattern batch |
-| `field_access` (json_polyglot) | ~13× | JSON tape scan. #7499 landed the reparse path but is a deliberate **no-op here** — the cost is the 10k `lazy_get` calls, so the early batch-flip trigger is the real fix |
-| element-shape kernel (`keep[j].v`) | 6.2× vs node | repsel — invariant landed (#7496), consumer pending |
-| `string_template_interp` | 3.09× | string building |
-| `json_stringify_1mb` | 2.62× | JSON stringify |
-
-**Wins to protect:** JSON roundtrip **194 ms vs bun 221 / node 384** (the
-tape's memcpy path — any tape change is measured against it; #7476 pins the
-numbers); `date_format_parse` 0.82× vs bun.
+### Performance backlog — full app-pattern sweep (v0.5.1299, pinned quiet mini)
+
+AC power, CPU-quiet gate passed, node 22.23.1 / bun 1.3.14, 11 runs per cell.
+**All twelve kernels, worst first** — this supersedes the earlier partial table,
+which topped out at 6.27x and predated two kernels running at all:
+
+| kernel | perry | bun | node | perry/bun | owner |
+|---|--:|--:|--:|--:|---|
+| **object_deep_clone** | 657.0 ms | 17.5 | 56.9 | **37.5x** | **#7533** |
+| **promise_all_chains** | 259.7 ms | 22.7 | 64.0 | **11.4x** | unowned |
+| json_parse_1mb | 438.2 ms | 68.1 | 127.1 | 6.4x | unowned |
+| batch | 127.8 ms | 26.5 | 74.8 | 4.8x | unowned |
+| map_1m | 1233.7 ms | 256.5 | 320.1 | 4.8x | unowned (largest absolute) |
+| string_template_interp | 106.9 ms | 41.6 | 100.6 | 2.6x | unowned |
+| json_stringify_1mb | 97.3 ms | 38.5 | 95.1 | 2.5x | unowned |
+| string_concat_csv | 51.3 ms | 27.1 | 82.3 | 1.9x | borderline |
+| buffer_transcode | 58.2 ms | 43.9 | 85.8 | 1.3x | ok |
+| string_split_map_join | 51.1 ms | 44.1 | 75.8 | 1.2x | ok |
+| regex_replace | 56.4 ms | 49.8 | 98.0 | 1.1x | ok |
+| **date_format_parse** | 36.0 ms | 44.8 | 116.3 | **0.80x** | **win** |
+
+**`object_deep_clone` and `promise_all_chains` are new to this table because
+they were CRASHING, not slow** — fixed today by #7495 and #7516/#7529. Their
+first-ever measurement makes deep clone the worst cell by 3x over the next.
+#7533 carries the profile-first instruction and an explicit A/B against
+`f06270d06` to establish how much predates today's rooting stack.
+
+### JSON polyglot legs — the tape is a net negative on scans
+
+Same run. `roundtrip` is the crown jewel and `field_access` is the problem:
+
+| leg | perry optimized | perry idiomatic | bun | node | rust serde_json |
+|---|--:|--:|--:|--:|--:|
+| roundtrip | **192 ms** (82 MB) | 1307 ms | 216 | 379 | 178 |
+| field_access | **2984 ms** (219 MB, sigma 136) | **1350 ms** (61 MB) | 218 | 380 | 183 |
+
+Perry **wins roundtrip** against both JS runtimes and lands within ~8% of Rust
+serde_json. But on `field_access` the **optimized configuration is 2.2x SLOWER
+than the unoptimized one** and carries 3.6x the RSS — the lazy tape is a net
+negative on scan-shaped access, and its sigma of 136 (against every other row's
+under 5) says the cost is data-dependently variable. The 1350 ms idiomatic row
+is the floor any fix must beat: simply declining the tape for this shape would
+already be 2.2x better. Tracked in **#7478**.
 
 ### Gates and blockers
 
@@ -124,32 +150,40 @@ numbers); `date_format_parse` 0.82× vs bun.
 
 ## What is left, in order
 
-1. **#7510 — `gc::layout` side tables (33.6%)**, the single biggest lever in
-   the engine. Its thread-local lookups are also part of the 17% TLS residue,
-   so one fix pays twice. Needs the quiet host to verify.
-2. **#7497** — the last blocker on the public benchmark artifact. Publishing
-   turns `lint` green and **ends admin-bypass merging**; #7475 is closed
-   (it was a rooting bug, not the feature-stripped archive — #7495).
-3. **#7512** — cheap bisect first: a static IR call-census diff says what the
-   class path emits that the literal path does not. May collapse into #7510 or
-   #7511, which is why it runs before either.
-4. **#7511 — write barriers (16.1%)**, sequenced after #7512 in case that
-   accounts for it. Correctness-first: acceptance requires
+1. **#7533 — `object_deep_clone` at 37.5x bun**, the worst cell in the public
+   artifact by 3x and newly measurable (it used to crash). Profile FIRST; the
+   issue carries an explicit A/B against `f06270d06` to settle whether today's
+   rooting re-reads are material on a spread-heavy workload. If they are, the
+   answer is hoisting them (#7487's pooled-alloca precedent), never removing
+   them — they close real use-after-frees.
+2. **#7478 — the JSON tape's scan path**, where our optimized build is 2.2x
+   slower than our unoptimized one. The 1350 ms idiomatic row is the floor.
+3. **#7510 — `gc::layout` side tables**, whose real remaining lever is
+   `js_gc_init_typed_shape_layout` + `shape_install_shared` (~13%), rebuilding
+   both masks on every construction of an already-installed shape. #7525 landed
+   the emptiness prerequisite and corrected the ticket's stale premise
+   (`layout_forget_object` is 3.0%, not the 14.5% it was filed on).
+4. **#7511 — write barriers (16.1%)**. Correctness-first: acceptance requires
    `PERRY_GC_VERIFY_EVACUATION=1` / `PERRY_GC_VERIFY_MARK=1` and the ratchet
    probes, because a wrong answer here corrupts memory rather than slowing it.
-5. **Repsel** — the element-shape invariant landed (#7496); the versioned-loop
+5. **#7502 — the shipped root lowering has no coverage**: nine mechanics have
+   no native-roots assertion anywhere, six of them shapes
+   `gc-rooting-invariant.md` records as having already shipped broken. Today's
+   ~20 rooting bugs were all found by hand with `PERRY_GC_PROTECT_FROMSPACE`
+   because nothing else can find them. This is the structural fix.
+6. **Repsel** — the element-shape invariant landed (#7496); the versioned-loop
    consumer and element `Ptr<Shape>` remain. Deliberately sequenced **after**
    the bookkeeping levers: element reads are 13% of `churn` at 4.3×, the best
    ratio in the table, so this is an RSS/footprint play more than a time one.
-6. **Layer 1** — migrate remaining lowerings onto the rooted-combinator API
+7. **Layer 1** — migrate remaining lowerings onto the rooted-combinator API
    (`crates/perry-codegen/src/rooting.rs`); the arm-aware scan is the
    worklist tool. **Layer 3** — shrink the 107-module ceiling list toward
    empty; the end state is the raw accessor unreachable, not counted.
-7. **Statepoint-side static checker** — teach `gc_root_dominance_check.py` to
+8. **Statepoint-side static checker** — teach `gc_root_dominance_check.py` to
    read relocation bundles, closing the gap the #7452/#7460 repairs named.
-8. **RSS re-derivation under the statepoint default** (#7056) — the earlier
+9. **RSS re-derivation under the statepoint default** (#7056) — the earlier
    numbers were measured under the shadow stack.
-9. **Ratchet large-Eden probe arm** (#7481's lesson), plus the pending
+10. **Ratchet large-Eden probe arm** (#7481's lesson), plus the pending
    quiet-host re-pins (`wt-scavtenure` baseline).
 
 ---