diff --git a/.github/workflows/gc-ptr-shape-off-witness.yml b/.github/workflows/gc-ptr-shape-off-witness.yml
new file mode 100644
index 0000000000..ec727b5654
--- /dev/null
+++ b/.github/workflows/gc-ptr-shape-off-witness.yml
@@ -0,0 +1,215 @@
+name: GC Ptr<Shape> OFF-arm witness
+
+# #6984: PERRY_PTR_SHAPE_LOCALS is the documented A/B kill switch for repsel
+# Phase 3b/5a (`Ptr<Shape>` proven object locals + the proven-`this` method
+# clones it feeds, #6911/#6925). Its whole point is that flipping it OFF
+# reverts to the boxed lowering and reproduces byte-identical output — that is
+# the entire premise the `rep_ptr_shape_off` matrix arm and every other
+# representation's own OFF arm exist to verify (CLAUDE.md's GC knob
+# kill-policy: "every GC env knob either has a required CI arm exercising its
+# OFF state, or it is deleted after one release of soak").
+#
+# That premise was FALSE on `main` for #6976/#6984: with the switch off, an
+# interface-typed local with `new` provenance and a scalar-replaceable
+# constructor (`const o: Shaped = new Impl(...)`) crashed with `TypeError:
+# Cannot read properties of undefined`. No GC was involved (`cycles=0
+# moved=0`) — this is a plain codegen defect in a completely different,
+# supposedly-orthogonal optimization (scalar replacement of `new` locals,
+# `collectors/escape_news.rs`), which the switch is not even supposed to
+# touch. It went unnoticed because the arm that would have caught it —
+# `rep_ptr_shape_off`, part of `scripts/gc_repsel_matrix.sh`'s `--arms all` —
+# is NOT in `gc-stress`'s PR-gating subset (`PR_ARMS` in that script), so no
+# per-PR run ever compiled with the switch off. `--arms all` only runs on
+# push-to-main/schedule/workflow_dispatch, so a regression here would sit
+# undetected for up to a release cycle, exactly the class of hole #7194 (the
+# `gc_gate_wiring_check.py` precedent) was written to close for the moving
+# collector.
+#
+# WHAT THIS DOES
+#
+# One arm, the whole representation-selection corpus:
+#
+#   scripts/gc_repsel_matrix.sh --arms rep_ptr_shape_off --filter test_gap_repsel_
+#
+# `rep_ptr_shape_off` compiles with `PERRY_PTR_SHAPE_LOCALS=0` and runs under
+# the evacuating base + forced evacuation (`%E% PERRY_GC_FORCE_EVACUATE=1`),
+# so it doubles as the OFF arm's GC-under-evacuation witness — not just this
+# one crash's regression test. The matrix's own exit status already covers
+# both halves of CLAUDE.md's "four ways a gate can be unable to fail" #4: a
+# FAIL cell fails the run, and an all-UNVER table (the arm's `requires=move`
+# never actually relocating anything) fails it too
+# (`scripts/gc_matrix_liveness_check.py`, invoked by the matrix script
+# itself) — so this job needs no separate liveness re-check the way
+# `gc-moving-witnesses.yml` does for its non-repsel-prefixed corpus.
+#
+# THIS JOB IS DESIGNED TO BE ABLE TO FAIL, checked against all four ways
+# (CLAUDE.md):
+#
+#   1. no `continue-on-error`, no `|| true`, no pipe between the matrix and
+#      the shell's exit status;
+#   2. NOT in branch protection's required contexts yet, deliberately: a new
+#      gate has never been green, and promoting it immediately would block
+#      every open PR (CLAUDE.md's own corollary). Promote once it has a green
+#      run on `main` — that is a maintainer action, not something this PR
+#      does.
+#   3. `concurrency` cancels pull-request runs only; `main` runs are keyed on
+#      the commit SHA so they queue instead of being cancelled by the next
+#      merge (#7205's fix, replicated from gc-moving-witnesses.yml).
+#   4. the matrix's OWN exit status already asserts liveness (see above), so
+#      a green run here means the OFF arm actually compiled, actually ran,
+#      and actually matched the pinned Node oracle — not merely that nothing
+#      threw.
+#
+# WHAT THIS DELIBERATELY DOES NOT COVER
+#
+#   * The other representations' own OFF arms (`rep_i32_off`, `rep_str_off`,
+#     `rep_ptr_numarray_off`, `rep_spec_abi_off`, `rep_int_valued_off`,
+#     `rep_str_static_off`) are still only exercised by `--arms all` on
+#     push/schedule. This job is scoped to the one knob #6984 was filed
+#     against; extending it to the others is a separate decision with its own
+#     cost/coverage tradeoff, not bundled in here.
+#   * `--arms all`'s other cells continue to run on their existing schedule
+#     (gc-stress in test.yml); this job does not replace that run, it adds a
+#     per-PR arm the existing PR-gating subset omits.
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  # One group per main COMMIT, cancelling PR runs only — see
+  # gc-moving-witnesses.yml's comment for the #7205 rationale this mirrors.
+  group: gc-ptr-shape-off-witness-${{ github.event_name }}-${{ github.event_name == 'push' && github.sha || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
+env:
+  CARGO_TERM_COLOR: always
+  # scripts/gc_repsel_matrix.sh deliberately does NOT set
+  # PERRY_NO_AUTO_OPTIMIZE (see its own header): the auto-optimizer decides
+  # whether the linked runtime carries the `diagnostics` feature, which
+  # changes the GC trace format the harness parses for its liveness evidence.
+  # Setting it here from outside could silently turn every cell UNVER.
+
+jobs:
+  gc-ptr-shape-off-witness:
+    # ubuntu-latest, matching gc-stress: the matrix already runs there, and
+    # the cargo cache is shared with that job (same `shared-key`) so this
+    # build is usually warm.
+    runs-on: ubuntu-latest
+    timeout-minutes: 90
+    permissions:
+      contents: read
+      pull-requests: read
+    steps:
+      - uses: actions/checkout@v7
+        with:
+          persist-credentials: false
+
+      - name: Decide whether this change can affect Ptr<Shape> lowering
+        id: relevance
+        env:
+          GH_TOKEN: ${{ github.token }}
+          EVENT_NAME: ${{ github.event_name }}
+          REPOSITORY: ${{ github.repository }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+        run: |
+          set -euo pipefail
+          if [[ "$EVENT_NAME" != "pull_request" ]]; then
+            echo "run=true" >> "$GITHUB_OUTPUT"
+            echo "Not a pull request; running the witness."
+            exit 0
+          fi
+          gh api "repos/$REPOSITORY/pulls/$PR_NUMBER/files" --paginate --jq '.[].filename' > changed.txt
+          # Deliberately broad, same rationale as gc-moving-witnesses.yml:
+          # anything under crates/ can move what a scalar-replaced receiver's
+          # method-call lowering resolves to, not just the Ptr<Shape>
+          # collectors themselves — #6984's defect lived in
+          # lower_call/scalar_method.rs, three files away from ptr_shape.rs.
+          if grep -qE '^(crates/|scripts/gc_repsel_matrix\.sh$|test-files/test_gap_repsel_|test-parity/gc_repsel_|Cargo\.(toml|lock)$|\.node-version$|\.github/workflows/gc-ptr-shape-off-witness\.yml$)' changed.txt; then
+            echo "run=true" >> "$GITHUB_OUTPUT"
+            echo "Change touches representation-selection-relevant paths; running the witness."
+          else
+            echo "run=false" >> "$GITHUB_OUTPUT"
+            echo "No representation-selection-relevant paths changed."
+          fi
+
+      - name: Install Rust toolchain
+        if: steps.relevance.outputs.run == 'true'
+        uses: dtolnay/rust-toolchain@stable
+      - uses: ./.github/actions/setup-llvm22
+        if: steps.relevance.outputs.run == 'true'
+
+      - uses: Swatinem/rust-cache@v2
+        if: steps.relevance.outputs.run == 'true'
+        with:
+          # Same key as gc-stress, which builds the identical package set, so
+          # this job usually starts from that job's warm cache.
+          shared-key: "${{ runner.os }}-perry"
+          save-if: ${{ github.ref == 'refs/heads/main' }}
+
+      - name: Install clang
+        if: steps.relevance.outputs.run == 'true'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y clang
+
+      - name: Setup Node oracle
+        if: steps.relevance.outputs.run == 'true'
+        uses: actions/setup-node@v7
+        with:
+          # Single source of truth: .node-version. The matrix refuses to run
+          # when the running node disagrees with the pin, so a version drift
+          # here would abort loudly rather than silently drop a test.
+          node-version-file: .node-version
+
+      - name: Build perry and the runtime archives
+        if: steps.relevance.outputs.run == 'true'
+        env:
+          # Match cargo-test / gc-stress's linker workaround (lld SIGBUS on
+          # the shared runner during large links).
+          CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS: "-C linker-features=-lld"
+        run: |
+          set -euo pipefail
+          # perry-runtime / perry-stdlib are rlib-only; libperry_runtime.a and
+          # libperry_stdlib.a come from the -static wrapper crates. Building
+          # without them links a stale archive and makes the whole run
+          # vacuous (CLAUDE.md, "Verifying a runtime change"). Package set
+          # matches gc-stress exactly so the cache is shared.
+          cargo build --release \
+            -p perry -p perry-runtime -p perry-stdlib \
+            -p perry-runtime-static -p perry-stdlib-static
+          for artifact in perry libperry_runtime.a libperry_stdlib.a; do
+            test -s "target/release/$artifact" \
+              || { echo "::error::target/release/$artifact was not produced"; exit 1; }
+          done
+
+      # GATING. No pipe, no `|| true`: this step's exit status IS the gate.
+      # scripts/gc_repsel_matrix.sh's own exit status already folds in the
+      # liveness gate (scripts/gc_matrix_liveness_check.py) alongside the
+      # byte-exactness check, so a green run here means the OFF arm actually
+      # compiled, actually ran under evacuation, and actually matched the
+      # pinned Node oracle for every file in the representation-selection
+      # corpus — not merely that nothing threw (CLAUDE.md's "four ways a
+      # gate can be unable to fail", #4).
+      - name: Run the PERRY_PTR_SHAPE_LOCALS=0 witness across the repsel corpus
+        if: steps.relevance.outputs.run == 'true'
+        run: |
+          ./scripts/gc_repsel_matrix.sh \
+            --no-build \
+            --arms rep_ptr_shape_off \
+            --filter test_gap_repsel_ \
+            --json gc-ptr-shape-off-witness.json
+
+      - name: Upload the witness report
+        if: always() && steps.relevance.outputs.run == 'true'
+        uses: actions/upload-artifact@v7
+        with:
+          name: gc-ptr-shape-off-witness-${{ github.sha }}
+          path: gc-ptr-shape-off-witness.json
+          if-no-files-found: ignore
+          retention-days: 30
diff --git a/CLAUDE.md b/CLAUDE.md
index db7f3d8d95..7362dc7f8c 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:** 0.5.1414
+**Current Version:** 0.5.1415
 
 
 ## TypeScript Parity Status
diff --git a/Cargo.lock b/Cargo.lock
index 67d909e4da..3bda2629e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5547,7 +5547,7 @@ checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
 [[package]]
 name = "perry"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "base64",
@@ -5607,14 +5607,14 @@ dependencies = [
 
 [[package]]
 name = "perry-api-manifest"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "serde",
 ]
 
 [[package]]
 name = "perry-audio-miniaudio"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "cc",
  "libc",
@@ -5622,7 +5622,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "inkwell",
@@ -5639,7 +5639,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-arkts"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5647,7 +5647,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-glance"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5655,7 +5655,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-js"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-dispatch",
@@ -5664,7 +5664,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-swiftui"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5672,7 +5672,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wasm"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "base64",
@@ -5684,7 +5684,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wear-tiles"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5692,7 +5692,7 @@ dependencies = [
 
 [[package]]
 name = "perry-container-compose"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -5721,14 +5721,14 @@ dependencies = [
 
 [[package]]
 name = "perry-container-e2e"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
 ]
 
 [[package]]
 name = "perry-diagnostics"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "serde",
  "serde_json",
@@ -5736,7 +5736,7 @@ dependencies = [
 
 [[package]]
 name = "perry-dispatch"
-version = "0.5.1414"
+version = "0.5.1415"
 
 [[package]]
 name = "perry-doc-fixture-my-bindings"
@@ -5747,7 +5747,7 @@ dependencies = [
 
 [[package]]
 name = "perry-doc-tests"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "clap",
@@ -5762,7 +5762,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ads"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "block2",
  "objc2",
@@ -5772,7 +5772,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-argon2"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "argon2",
  "perry-ffi",
@@ -5780,7 +5780,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-axios"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "reqwest",
@@ -5789,7 +5789,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-bcrypt"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "bcrypt",
  "perry-ffi",
@@ -5797,7 +5797,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-better-sqlite3"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "rusqlite",
@@ -5805,7 +5805,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cheerio"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "scraper",
@@ -5813,7 +5813,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-commander"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5821,7 +5821,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cron"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "chrono",
  "cron",
@@ -5831,7 +5831,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dayjs"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5839,7 +5839,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-decimal"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "rust_decimal",
@@ -5847,7 +5847,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dotenv"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "serde_json",
@@ -5855,7 +5855,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ethers"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "rand 0.10.1",
@@ -5863,7 +5863,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-events"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5871,14 +5871,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-exponential-backoff"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-fastify"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "bytes",
  "http-body-util",
@@ -5896,7 +5896,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-fetch"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "bytes",
  "lazy_static",
@@ -5909,7 +5909,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-http"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "bytes",
  "h2",
@@ -5933,7 +5933,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ioredis"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -5943,7 +5943,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-jsonwebtoken"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "jsonwebtoken",
@@ -5954,7 +5954,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-lru-cache"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "lru",
  "perry-ffi",
@@ -5963,7 +5963,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-moment"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5971,7 +5971,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mongodb"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "bson",
  "futures-util",
@@ -5983,7 +5983,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mysql2"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5993,7 +5993,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nanoid"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "nanoid",
  "perry-ffi",
@@ -6002,7 +6002,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-net"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "bytes",
  "perry-ffi",
@@ -6015,7 +6015,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-node-forge"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "const-oid 0.9.6",
  "der 0.7.10",
@@ -6034,7 +6034,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nodemailer"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "lettre",
  "perry-ffi",
@@ -6044,7 +6044,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pdf"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "printpdf",
@@ -6052,7 +6052,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pg"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "sqlx",
@@ -6061,7 +6061,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ratelimit"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "governor",
  "perry-ffi",
@@ -6069,7 +6069,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-sharp"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "fast_image_resize",
  "image",
@@ -6079,14 +6079,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-slugify"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-streams"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -6095,7 +6095,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-undici"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6104,7 +6104,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-uuid"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "uuid",
@@ -6112,7 +6112,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-validator"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ffi",
  "regex",
@@ -6122,7 +6122,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ws"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "futures-util",
  "lazy_static",
@@ -6135,7 +6135,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-zlib"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "brotli",
  "flate2",
@@ -6145,7 +6145,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ffi"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "dashmap",
  "once_cell",
@@ -6154,7 +6154,7 @@ dependencies = [
 
 [[package]]
 name = "perry-hir"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-api-manifest",
@@ -6172,7 +6172,7 @@ dependencies = [
 
 [[package]]
 name = "perry-parser"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-diagnostics",
@@ -6184,7 +6184,7 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "base64",
@@ -6226,14 +6226,14 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime-static"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-runtime",
 ]
 
 [[package]]
 name = "perry-stdlib"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "aes 0.8.4",
  "aes 0.9.1",
@@ -6328,14 +6328,14 @@ dependencies = [
 
 [[package]]
 name = "perry-stdlib-static"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-stdlib",
 ]
 
 [[package]]
 name = "perry-transform"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -6344,14 +6344,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ui"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ui-model",
 ]
 
 [[package]]
 name = "perry-ui-android"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "itoa",
@@ -6368,7 +6368,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-geisterhand"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "rand 0.10.1",
  "serde",
@@ -6378,7 +6378,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-gtk4"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "cairo-rs 0.22.0",
@@ -6401,7 +6401,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-ios"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "block2",
@@ -6417,7 +6417,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-macos"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "block2",
@@ -6432,7 +6432,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-model"
-version = "0.5.1414"
+version = "0.5.1415"
 
 [[package]]
 name = "perry-ui-test"
@@ -6443,11 +6443,11 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-testkit"
-version = "0.5.1414"
+version = "0.5.1415"
 
 [[package]]
 name = "perry-ui-tvos"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "block2",
@@ -6463,7 +6463,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-visionos"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "block2",
@@ -6479,7 +6479,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-watchos"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "block2",
  "libc",
@@ -6492,7 +6492,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "base64",
  "libc",
@@ -6509,14 +6509,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows-winui"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "perry-ui-windows",
 ]
 
 [[package]]
 name = "perry-updater"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "anyhow",
  "base64",
@@ -6532,7 +6532,7 @@ dependencies = [
 
 [[package]]
 name = "perry-wasm-host"
-version = "0.5.1414"
+version = "0.5.1415"
 dependencies = [
  "wasmi",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 4baa4585ef..9631a4fd83 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -315,7 +315,7 @@ codegen-units = 16
 codegen-units = 16
 
 [workspace.package]
-version = "0.5.1414"
+version = "0.5.1415"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"
diff --git a/changelog.d/7718-ptr-shape-kill-switch.md b/changelog.d/7718-ptr-shape-kill-switch.md
new file mode 100644
index 0000000000..e3aaf4dfc7
--- /dev/null
+++ b/changelog.d/7718-ptr-shape-kill-switch.md
@@ -0,0 +1,5 @@
+### Fixed
+- **repsel: `PERRY_PTR_SHAPE_LOCALS=0` crashed on a scalar-replaced receiver whose declared type is not a class** (#6984, #6976). The kill switch's front-door eligibility gates (`collectors/ptr_shape.rs`, `collectors/proven_this.rs`) were already correctly wired — the bug was one level down, in a completely different, supposedly-orthogonal optimization: scalar replacement of `new` locals (`collectors/escape_news.rs`) and its method-call summarizer (`lower_call/scalar_method.rs`). That summarizer resolved a scalar-replaced receiver's class via `type_analysis::predicates::receiver_class_name`, whose fallback — reached whenever Phase 3b's `Ptr<Shape>` proof is unavailable, whether from the kill switch or any other denial — returns the local's *declared* type name. For `const o: Shaped = new Impl(...)` (an interface- or alias-typed local with `new` provenance), that name is `"Shaped"`, which is not a registered class. `simple_scalar_method_summary` then failed to find it, the summarizer gave up, and the caller fell through to the ordinary heap-object method-dispatch lowering — which reads the receiver from a local slot that scalar replacement had already turned into a bare, never-initialized alloca (the heap allocation was elided). Reading that slot produced garbage that decoded as `undefined`, and `o.area()` threw `TypeError: Cannot read properties of undefined`.
+- Fixed in `lower_call/scalar_method.rs::try_lower_scalar_replaced_method_call` by resolving the receiver's class from `ctx.non_escaping_news` (the exact map that gated scalar replacement for that local in the first place — keyed by the `new` expression's own class name, never the declared annotation) before falling back to `receiver_class_name`. This makes scalar replacement's method-call summarization independent of `PERRY_PTR_SHAPE_LOCALS` for `new`-provenance receivers, matching the house rule that a representation knob may move only the sites of the representation it names. Verified byte-identical LLVM IR for the default (switch-on) build before and after the fix — the change is a pure no-op there — and byte-identical output against the pinned Node oracle for both arms of `PERRY_PTR_SHAPE_LOCALS` on `test_gap_repsel_ptr_shape_locals.ts` and the wider `test_gap_repsel_*` corpus.
+- Removed the now-obsolete triage entry for `test_gap_repsel_ptr_shape_locals | rep_ptr_shape_off` in `test-parity/gc_repsel_triage.txt` (per #6976's own instruction to remove it once fixed).
+- Added `.github/workflows/gc-ptr-shape-off-witness.yml`: a per-PR CI arm that runs `scripts/gc_repsel_matrix.sh --arms rep_ptr_shape_off --filter test_gap_repsel_` (the whole representation-selection corpus, not just the one file), since `rep_ptr_shape_off` is not part of `gc-stress`'s PR-gating subset and previously only ran on push-to-main/schedule — so a regression on the kill switch's OFF state could sit undetected for up to a release cycle. Not yet in branch protection's required contexts (a new gate has never been green); promoting it once it has a green run on `main` is a maintainer action.
diff --git a/crates/perry-codegen/src/lower_call/scalar_method.rs b/crates/perry-codegen/src/lower_call/scalar_method.rs
index d3d7011210..e354b5f20a 100644
--- a/crates/perry-codegen/src/lower_call/scalar_method.rs
+++ b/crates/perry-codegen/src/lower_call/scalar_method.rs
@@ -980,7 +980,43 @@ pub(super) fn try_lower_scalar_replaced_method_call(
     if !ctx.scalar_replaced.contains_key(receiver_id) {
         return Ok(None);
     }
-    let Some(class_name) = crate::type_analysis::receiver_class_name(ctx, object.as_ref()) else {
+    // #6984: resolve the class from the `new` expression's own provenance
+    // (`ctx.non_escaping_news`, the exact map that gated scalar replacement
+    // for this local in `let_stmt.rs`) BEFORE falling back to the general
+    // `receiver_class_name` resolver.
+    //
+    // `receiver_class_name` is built for guarded/dynamic dispatch, where a
+    // local's DECLARED type is a safe stand-in whenever no `Ptr<Shape>` proof
+    // is available — that dispatch always re-checks the class in the
+    // registry and falls back cleanly on a miss. Scalar replacement's
+    // receiver has no such fallback: once a local is scalar-replaced,
+    // `ctx.locals[receiver_id]` is a bare, never-initialized alloca (the
+    // heap allocation was elided), so any lowering that reads it as an
+    // ordinary boxed receiver observes garbage. `receiver_class_name`'s own
+    // fallback arm returns the DECLARED type name whenever Phase 3b's proof
+    // is unavailable for ANY reason (not just `PERRY_PTR_SHAPE_LOCALS=0`) —
+    // and for an interface- or alias-typed local (`const o: Shaped = new
+    // Impl(...)`) that name is not a registered class at all. Looking it up
+    // in `ctx.classes` then fails, `simple_scalar_method_summary` returns
+    // `None`, this function bails, and the caller falls through to the
+    // ordinary heap-object method-call lowering — which reads the
+    // uninitialized dummy slot and crashes (`TypeError: Cannot read
+    // properties of undefined`).
+    //
+    // `ctx.non_escaping_news` is exact and structural: it is keyed by the
+    // `New` expression's own class name, never the declared annotation, so
+    // it names the correct class regardless of whether Phase 3b ran at all.
+    // Any id present in `ctx.scalar_replaced` via the `New` branch of
+    // `let_stmt.rs` is present here with the identical class name; the only
+    // scalar-replaced receivers NOT covered are non-escaping OBJECT
+    // LITERALS, which carry no class and keep falling back to
+    // `receiver_class_name` (unchanged, and already `None` for them there).
+    let class_name_opt = ctx
+        .non_escaping_news
+        .get(receiver_id)
+        .cloned()
+        .or_else(|| crate::type_analysis::receiver_class_name(ctx, object.as_ref()));
+    let Some(class_name) = class_name_opt else {
         return Ok(None);
     };
     let Some(method) = crate::collectors::simple_scalar_method_summary(
diff --git a/docs/src/testing/test-registration.md b/docs/src/testing/test-registration.md
index b19dca1480..2e43eef163 100644
--- a/docs/src/testing/test-registration.md
+++ b/docs/src/testing/test-registration.md
@@ -45,7 +45,7 @@ Run `--list` for the authoritative version with every exclusion and its reason.
 
 | Registry | Candidate files | Runner |
 |----------|-----------------|--------|
-| `test-parity/gc_repsel_corpus.txt` | `test-files/test_gap_{gc,repsel,specabi}_*.ts` | `scripts/gc_repsel_matrix.sh` (`gc-stress`, `gc-moving-witnesses`) |
+| `test-parity/gc_repsel_corpus.txt` | `test-files/test_gap_{gc,repsel,specabi}_*.ts` | `scripts/gc_repsel_matrix.sh` (`gc-stress`, `gc-moving-witnesses`, `gc-ptr-shape-off-witness`) |
 | `test-features/feature_matrix.toml` | `test-features/probes/**/*.ts` | `scripts/gen_feature_matrix.py` (`feature-matrix`) |
 | `benchmarks/compiler_output/workloads.toml` | `benchmarks/compiler_output/fixtures/**/*.ts` | `scripts/compiler_output_regression.py` (`compiler-output-regression`) |
 | a `mod` declaration in the parent module | `crates/*/**/tests/**/*.rs` below a suite root | `cargo test` |
diff --git a/scripts/check_test_registration.py b/scripts/check_test_registration.py
index f31da1966c..06b6d79412 100644
--- a/scripts/check_test_registration.py
+++ b/scripts/check_test_registration.py
@@ -273,7 +273,7 @@ def _stem(rel: str) -> str:
             "test-files/test_gap_specabi_*.ts",
         ),
         registry="test-parity/gc_repsel_corpus.txt",
-        runner="scripts/gc_repsel_matrix.sh (gc-stress, gc-moving-witnesses)",
+        runner="scripts/gc_repsel_matrix.sh (gc-stress, gc-moving-witnesses, gc-ptr-shape-off-witness)",
         key=_stem,
         registered=lambda t: _read_hash_list(t, "test-parity/gc_repsel_corpus.txt"),
         entry_to_path=lambda e: "test-files/%s.ts" % e,
diff --git a/test-parity/gc_repsel_triage.txt b/test-parity/gc_repsel_triage.txt
index 4fdcc3ac8a..3fadf47448 100644
--- a/test-parity/gc_repsel_triage.txt
+++ b/test-parity/gc_repsel_triage.txt
@@ -14,8 +14,6 @@
 # is in the PR arm set, so it is the arm that will catch the next unrooted
 # temporary. Do not re-triage it without a new issue number and a reason.
 
-test_gap_repsel_ptr_shape_locals | rep_ptr_shape_off | #6976 -- REGRESSION IN THE REPRESENTATION'S OWN OFF-SWITCH, not a defect in this PR. Bisected: passes at 8327ced52, fails at 1a533a3a8 (#6925, repsel Phase 5a proven `this`). With PERRY_PTR_SHAPE_LOCALS=0 the program dies partway with `TypeError: Cannot read properties of undefined (reading 'area')`, losing its last five output lines. It was invisible until now because #6925 also left test_gap_repsel_proven_this_frozen.ts unregistered, which makes this script exit 3 before it runs anything -- the gate was dark, not green. REMOVE THIS ENTRY when #6976 is fixed; an OFF arm is supposed to be the safest cell in the matrix.
-
 # --- #7216's Object.assign witness on the ALLOCATION-POINT arms (#7248) ------
 # RETARGETED FROM #7217, AND ITS STATED CAUSE WAS WRONG.
 #