diff --git a/CLAUDE.md b/CLAUDE.md
index d29ed8825d..2774741392 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:** 0.5.1558
+**Current Version:** 0.5.1559
 
 
 ## TypeScript Parity Status
diff --git a/Cargo.lock b/Cargo.lock
index f40f875f4f..6a4abfd6d8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5690,7 +5690,7 @@ checksum = "1542e48011813fbdf3c075da4a4ed53ee93c816eef62e36eb5064a6fd2be10a5"
 
 [[package]]
 name = "perry"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -5754,7 +5754,7 @@ dependencies = [
 
 [[package]]
 name = "perry-api-manifest"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-dispatch",
  "serde",
@@ -5762,7 +5762,7 @@ dependencies = [
 
 [[package]]
 name = "perry-audio-miniaudio"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "cc",
  "libc",
@@ -5771,7 +5771,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "aho-corasick",
  "anyhow",
@@ -5789,7 +5789,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-arkts"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5797,7 +5797,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-glance"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5805,7 +5805,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-js"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-dispatch",
@@ -5814,7 +5814,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-swiftui"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5822,7 +5822,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wasm"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -5834,7 +5834,7 @@ dependencies = [
 
 [[package]]
 name = "perry-codegen-wear-tiles"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -5842,7 +5842,7 @@ dependencies = [
 
 [[package]]
 name = "perry-container-compose"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -5870,14 +5870,14 @@ dependencies = [
 
 [[package]]
 name = "perry-container-e2e"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
 ]
 
 [[package]]
 name = "perry-diagnostics"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "serde",
  "serde_json",
@@ -5885,7 +5885,7 @@ dependencies = [
 
 [[package]]
 name = "perry-dispatch"
-version = "0.5.1558"
+version = "0.5.1559"
 
 [[package]]
 name = "perry-doc-fixture-my-bindings"
@@ -5896,7 +5896,7 @@ dependencies = [
 
 [[package]]
 name = "perry-doc-tests"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "clap",
@@ -5911,7 +5911,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ads"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "block2",
  "objc2",
@@ -5921,7 +5921,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-argon2"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "argon2",
  "perry-ffi",
@@ -5930,7 +5930,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-axios"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "reqwest",
@@ -5939,7 +5939,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-bcrypt"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "bcrypt",
  "perry-ffi",
@@ -5947,7 +5947,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-better-sqlite3"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "rusqlite",
@@ -5955,7 +5955,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cheerio"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "scraper",
@@ -5963,7 +5963,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-commander"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -5971,7 +5971,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-cron"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "chrono",
  "cron",
@@ -5981,7 +5981,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dayjs"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -5989,7 +5989,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-decimal"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "rust_decimal",
@@ -5997,7 +5997,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-dotenv"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "serde_json",
@@ -6005,7 +6005,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ethers"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "rand 0.10.2",
@@ -6013,7 +6013,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-events"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6021,14 +6021,14 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-exponential-backoff"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
 ]
 
 [[package]]
 name = "perry-ext-fastify"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "bytes",
  "http-body-util",
@@ -6046,7 +6046,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-fetch"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "bytes",
  "lazy_static",
@@ -6059,7 +6059,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-http"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "bytes",
@@ -6091,7 +6091,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ioredis"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -6101,7 +6101,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-jsonwebtoken"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "jsonwebtoken",
@@ -6112,7 +6112,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-lru-cache"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "lru",
  "perry-ffi",
@@ -6121,7 +6121,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-moment"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -6129,7 +6129,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mongodb"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "bson",
  "futures-util",
@@ -6141,7 +6141,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-mysql2"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "chrono",
  "perry-ffi",
@@ -6153,7 +6153,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nanoid"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "nanoid",
  "perry-ffi",
@@ -6162,7 +6162,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-net"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "bytes",
  "perry-ffi",
@@ -6177,7 +6177,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-node-forge"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "const-oid 0.10.2",
  "der 0.8.1",
@@ -6196,7 +6196,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-nodemailer"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "lettre",
  "perry-ffi",
@@ -6206,7 +6206,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-parcel-watcher"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "notify",
  "perry-ffi",
@@ -6218,7 +6218,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pdf"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "printpdf",
@@ -6226,7 +6226,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-pg"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "sqlx",
@@ -6235,7 +6235,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-qs"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6244,7 +6244,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ratelimit"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "governor",
  "perry-ffi",
@@ -6252,7 +6252,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-sharp"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "fast_image_resize",
  "image",
@@ -6263,7 +6263,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-streams"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "lazy_static",
  "perry-ffi",
@@ -6272,7 +6272,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-typescript"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-ffi",
@@ -6292,7 +6292,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-undici"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "perry-runtime",
@@ -6301,7 +6301,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-uuid"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "uuid",
@@ -6309,7 +6309,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-validator"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "perry-validation",
@@ -6318,7 +6318,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-ws"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "futures-util",
  "lazy_static",
@@ -6331,7 +6331,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ext-zlib"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "brotli",
  "flate2",
@@ -6341,7 +6341,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ffi"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "dashmap 6.2.1",
  "once_cell",
@@ -6351,7 +6351,7 @@ dependencies = [
 
 [[package]]
 name = "perry-hir"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-api-manifest",
@@ -6372,11 +6372,11 @@ dependencies = [
 
 [[package]]
 name = "perry-native-registration"
-version = "0.5.1558"
+version = "0.5.1559"
 
 [[package]]
 name = "perry-parser"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-diagnostics",
@@ -6390,7 +6390,7 @@ dependencies = [
 
 [[package]]
 name = "perry-perex"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perex",
  "regex",
@@ -6398,7 +6398,7 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "ahash",
  "anyhow",
@@ -6458,14 +6458,14 @@ dependencies = [
 
 [[package]]
 name = "perry-runtime-static"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-runtime",
 ]
 
 [[package]]
 name = "perry-stdlib"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "aes 0.8.4",
  "aes 0.9.1",
@@ -6560,14 +6560,14 @@ dependencies = [
 
 [[package]]
 name = "perry-stdlib-static"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-stdlib",
 ]
 
 [[package]]
 name = "perry-transform"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "perry-hir",
@@ -6576,7 +6576,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "perry-ffi",
  "perry-ui-model",
@@ -6584,7 +6584,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-android"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "itoa",
@@ -6602,7 +6602,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-geisterhand"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "rand 0.10.2",
  "serde",
@@ -6612,7 +6612,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-gtk4"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "cairo-rs 0.22.9",
@@ -6635,7 +6635,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-ios"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6652,7 +6652,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-macos"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6669,7 +6669,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-model"
-version = "0.5.1558"
+version = "0.5.1559"
 
 [[package]]
 name = "perry-ui-test"
@@ -6680,11 +6680,11 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-testkit"
-version = "0.5.1558"
+version = "0.5.1559"
 
 [[package]]
 name = "perry-ui-tvos"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6701,7 +6701,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-visionos"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "block2",
@@ -6718,7 +6718,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-watchos"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "block2",
  "libc",
@@ -6732,7 +6732,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "libc",
@@ -6751,7 +6751,7 @@ dependencies = [
 
 [[package]]
 name = "perry-ui-windows-winui"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "base64 0.22.1",
  "libc",
@@ -6764,7 +6764,7 @@ dependencies = [
 
 [[package]]
 name = "perry-updater"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "anyhow",
  "base64 0.22.1",
@@ -6780,7 +6780,7 @@ dependencies = [
 
 [[package]]
 name = "perry-validation"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "idna",
  "regex",
@@ -6790,7 +6790,7 @@ dependencies = [
 
 [[package]]
 name = "perry-wasm-host"
-version = "0.5.1558"
+version = "0.5.1559"
 dependencies = [
  "wasmi",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 33d27e8f9e..3dd88af770 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -338,7 +338,7 @@ codegen-units = 1
 codegen-units = 1
 
 [workspace.package]
-version = "0.5.1558"
+version = "0.5.1559"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"
diff --git a/changelog.d/10197-namespace-spread-call-var.md b/changelog.d/10197-namespace-spread-call-var.md
new file mode 100644
index 0000000000..faf4cbcc73
--- /dev/null
+++ b/changelog.d/10197-namespace-spread-call-var.md
@@ -0,0 +1,3 @@
+### Fixed
+
+- `ns.member(...spread)` on a `const`-bound rest-parameter export (`export const mergeAll = (...ctxs) => …`, e.g. effect's `Context.mergeAll(...contexts)` inside `Layer.mergeAll`) now calls the closure; the spread fast path treated the export's value getter as the function body and evaluated to the function instead (#10197).
diff --git a/changelog.d/10203-traversal-feedback-hot-tls.md b/changelog.d/10203-traversal-feedback-hot-tls.md
new file mode 100644
index 0000000000..a0a93a3d17
--- /dev/null
+++ b/changelog.d/10203-traversal-feedback-hot-tls.md
@@ -0,0 +1,3 @@
+### fix(json): route the traversal-feedback counters through the hot thread-local cache
+
+`json/traversal_feedback.rs` declared its two per-thread counters with a raw `thread_local!`, which the thread-local policy ratchet (`scripts/check_thread_locals.py`) rejects; they now use `crate::perry_thread_local!` like every other runtime declaration, so the per-parse read lands in the hot TLS cache instead of a `_tlv_get_addr` call.
diff --git a/changelog.d/10210-static-getter-call-path.md b/changelog.d/10210-static-getter-call-path.md
new file mode 100644
index 0000000000..30ed28f824
--- /dev/null
+++ b/changelog.d/10210-static-getter-call-path.md
@@ -0,0 +1,12 @@
+Fix method calls inside static getters of classes that extend a call expression
+(effect v4 `class Svc extends Context.Service<Svc, Shape>()(id) {}` and
+OpenCode's `ConfigService.Service` wrapper). `this.of(x)` in such a getter threw
+"of is not a function" although reading `this.of` returned the function: the
+dynamic method-call dispatcher resolved only the static-method vtable for a
+per-evaluation class object, and the class-ref read path looked for the
+function-valued parent only on the receiver's own class. The class-object call
+arm now resolves the name exactly as the read path does (static accessors, the
+parent class object's statics, the ancestor function's swapped prototype) and
+calls the closure with `this` bound to the receiver; string- and symbol-keyed
+static reads walk the class chain for the function-valued ancestor. This
+unblocks OpenCode v1.18.30's runtime bootstrap (#10210).
diff --git a/crates/perry-codegen/src/expr/call_spread.rs b/crates/perry-codegen/src/expr/call_spread.rs
index eb219ff084..314b950d37 100644
--- a/crates/perry-codegen/src/expr/call_spread.rs
+++ b/crates/perry-codegen/src/expr/call_spread.rs
@@ -431,7 +431,24 @@ pub(crate) fn lower(ctx: &mut FnCtx<'_>, expr: &Expr) -> Result<String> {
                     } else {
                         ctx.imported_func_has_rest.contains(property)
                     };
-                    if ctx.namespace_imports.contains(ns_name) && has_rest && declared_count == 1 {
+                    // #10197: a `let`/`const`-bound export (`export const
+                    // mergeAll = (...ctxs) => …`) has no callable
+                    // `perry_fn_<src>__<name>` — that symbol is its zero-arg
+                    // VALUE getter — so bundling the spread into it returns
+                    // the closure instead of calling it (effect's
+                    // `Context.mergeAll(...contexts)` in `Layer.mergeAll`).
+                    // Mirror `try_lower_namespace_member_call`: vars take the
+                    // closure-callee path below, which reads the value and
+                    // applies the spread through
+                    // `js_closure_call_apply_with_spread`.
+                    let is_var = ctx
+                        .imported_vars
+                        .contains(&crate::namespace_member_var_key(ns_name, property));
+                    if ctx.namespace_imports.contains(ns_name)
+                        && has_rest
+                        && declared_count == 1
+                        && !is_var
+                    {
                         let source_prefix_opt = ctx
                             .namespace_member_prefixes
                             .get(&(ns_name.clone(), property.clone()))
diff --git a/crates/perry-runtime/src/json/traversal_feedback.rs b/crates/perry-runtime/src/json/traversal_feedback.rs
index f3017b0305..55f3ea2d2f 100644
--- a/crates/perry-runtime/src/json/traversal_feedback.rs
+++ b/crates/perry-runtime/src/json/traversal_feedback.rs
@@ -40,9 +40,8 @@ const SCORE_MAX: u8 = 8;
 /// the evidence keeps being refreshed.
 const RESAMPLE_EVERY: u8 = 16;
 
-// Two byte counters read once per parse: plain `thread_local!`, not the hot-TLS
-// macro, and no heap pointer can live in either.
-thread_local! {
+// Two byte counters read once per parse. No heap pointer can live in either.
+crate::perry_thread_local! {
     static SCORE: Cell<u8> = const { Cell::new(0) };
     static EAGER_RUN: Cell<u8> = const { Cell::new(0) };
 }
diff --git a/crates/perry-runtime/src/object/field_get_set/get_field_by_name.rs b/crates/perry-runtime/src/object/field_get_set/get_field_by_name.rs
index 55910e1fd6..721af36d12 100644
--- a/crates/perry-runtime/src/object/field_get_set/get_field_by_name.rs
+++ b/crates/perry-runtime/src/object/field_get_set/get_field_by_name.rs
@@ -1461,8 +1461,13 @@ pub extern "C" fn js_object_get_field_by_name(
                     // named static off the parent closure — its OWN props
                     // (`Svc.key` → "Svc") plus, via the closure getter, its
                     // static prototype (`Svc._op` → "Tag" on TagProto).
+                    // #10210: the edge is keyed by the class that directly
+                    // `extends <function>`, which may be an ANCESTOR of this
+                    // class (`class Flags extends ConfigTag {}` where
+                    // `ConfigTag extends Context.Service()(id)`), so walk the
+                    // parent chain like `super()` dispatch does.
                     if let Some(closure_ptr) =
-                        super::super::class_registry::class_parent_closure(class_id)
+                        super::super::class_registry::parent_closure_in_chain(class_id)
                     {
                         let v = crate::closure::closure_get_dynamic_prop(closure_ptr, name);
                         let vb = JSValue::from_bits(v.to_bits());
diff --git a/crates/perry-runtime/src/object/native_call_method/primitive_methods.rs b/crates/perry-runtime/src/object/native_call_method/primitive_methods.rs
index 25f6984852..5b5a174680 100644
--- a/crates/perry-runtime/src/object/native_call_method/primitive_methods.rs
+++ b/crates/perry-runtime/src/object/native_call_method/primitive_methods.rs
@@ -359,6 +359,45 @@ pub(super) unsafe fn dispatch_primitive(
                 ));
             }
         }
+        // #10210: the name may resolve where the static-method vtable cannot
+        // see it — a static ACCESSOR whose getter returns a function
+        // (`static get layer()`), a static of a per-evaluation parent class
+        // object, or the swapped prototype of a FUNCTION-valued ancestor
+        // (effect v4 `Context.Service<..>()(id)` is `function KeyClass(){}`
+        // + `Object.setPrototypeOf(KeyClass, ServiceProto)`, and a static
+        // getter on a subclass calls `this.of(x)` with `this` = this class
+        // object). The read path already resolves all of these, so mirror
+        // the class-ref arm (#5437): read the property exactly as
+        // `const f = C.of; f.call(C, x)` would, then call it with `this`
+        // bound to the receiver. Only a closure is dispatched here; anything
+        // else keeps falling through to the generic scan and the normal
+        // not-a-function error.
+        if class_id != 0 && !method_name_ptr.is_null() && method_name_len > 0 {
+            let key = crate::string::js_string_from_bytes(
+                method_name_ptr as *const u8,
+                method_name_len as u32,
+            );
+            let receiver = JSValue::from_bits(object_handle.get_nanbox_f64().to_bits())
+                .as_pointer::<ObjectHeader>();
+            let method = js_object_get_field_by_name(receiver, key);
+            if method.is_pointer()
+                && crate::closure::is_closure_ptr(crate::value::js_nanbox_get_pointer(
+                    f64::from_bits(method.bits()),
+                ) as usize)
+            {
+                let method = root_scope.root_nanbox_u64(method.bits());
+                let receiver = object_handle.get_nanbox_f64();
+                let bound =
+                    crate::closure::clone_closure_rebind_this(method.get_nanbox_u64(), receiver);
+                let _this = ImplicitThisScope::bind(receiver);
+                let args = refreshed_args();
+                return Some(crate::closure::js_native_call_value(
+                    f64::from_bits(bound),
+                    args.as_ptr(),
+                    args.len(),
+                ));
+            }
+        }
     }
 
     // #5142: a promise can carry user-attached own expando methods.
diff --git a/crates/perry-runtime/src/symbol/get.rs b/crates/perry-runtime/src/symbol/get.rs
index 0762d90c02..1fa3794a4d 100644
--- a/crates/perry-runtime/src/symbol/get.rs
+++ b/crates/perry-runtime/src/symbol/get.rs
@@ -648,8 +648,9 @@ pub unsafe extern "C" fn js_object_get_symbol_property(obj_f64: f64, sym_f64: f6
         // the parent closure — own symbol props plus, via the closure symbol
         // getter, its static prototype (`Svc[TagTypeId]`/`Svc[EffectTypeId]`
         // live on TagProto). Recurse into the closure-aware getter so its proto
-        // walk fires.
-        if let Some(closure_ptr) = crate::object::class_parent_closure(class_id) {
+        // walk fires. #10210: the edge may sit on an ancestor class — walk
+        // the chain.
+        if let Some(closure_ptr) = crate::object::parent_closure_in_chain(class_id) {
             let closure_f64 =
                 f64::from_bits(crate::value::js_nanbox_pointer(closure_ptr as i64).to_bits());
             let v = js_object_get_symbol_property(closure_f64, sym_f64);
diff --git a/crates/perry/tests/issue_10210_static_getter_call.rs b/crates/perry/tests/issue_10210_static_getter_call.rs
new file mode 100644
index 0000000000..f156f77a80
--- /dev/null
+++ b/crates/perry/tests/issue_10210_static_getter_call.rs
@@ -0,0 +1,147 @@
+//! Regression for #10210: a static getter on a class whose `extends` clause is a
+//! call expression (effect v4's `Context.Service<..>()(id)` returns a plain
+//! `function KeyClass(){}` whose `[[Prototype]]` was swapped with
+//! `Object.setPrototypeOf`) must be able to call `this.of(x)` — the CALL path
+//! has to resolve the name wherever the READ path does (static accessors,
+//! per-evaluation parent class objects, and the function-valued ancestor's
+//! swapped prototype), and the closure-parent edge must be found on an
+//! ancestor of the receiver's class, not only on the class itself.
+
+use std::path::PathBuf;
+use std::process::Command;
+use std::sync::Once;
+
+fn perry_bin() -> PathBuf {
+    PathBuf::from(env!("CARGO_BIN_EXE_perry"))
+}
+
+fn workspace_root() -> PathBuf {
+    PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("../..")
+        .canonicalize()
+        .expect("canonicalize workspace root")
+}
+
+fn runtime_dir() -> PathBuf {
+    static BUILD_RUNTIME: Once = Once::new();
+    BUILD_RUNTIME.call_once(|| {
+        let cargo = std::env::var_os("CARGO").unwrap_or_else(|| "cargo".into());
+        let build = Command::new(cargo)
+            .current_dir(workspace_root())
+            .arg("build")
+            .arg("-p")
+            .arg("perry-runtime-static")
+            .arg("-p")
+            .arg("perry-stdlib-static")
+            .output()
+            .expect("build static runtime archives");
+        assert!(
+            build.status.success(),
+            "static runtime build failed\nstdout:\n{}\nstderr:\n{}",
+            String::from_utf8_lossy(&build.stdout),
+            String::from_utf8_lossy(&build.stderr)
+        );
+    });
+    let target = std::env::var_os("CARGO_TARGET_DIR")
+        .map(PathBuf::from)
+        .unwrap_or_else(|| workspace_root().join("target"));
+    target.join("debug")
+}
+
+const SOURCE: &str = r#"
+const Proto: any = { of(self: any) { return self } }
+const Key = function () {
+  function K() {}
+  Object.setPrototypeOf(K, Proto)
+  ;(K as any).isK = true
+  return function (key: string) { (K as any).key = key; return K }
+}
+const t = (name: string, f: () => any) => {
+  try { console.log(name, JSON.stringify(f())) } catch (e: any) { console.log(name, "THROW", e.message) }
+}
+// nested class + subclass, static getter calls this.of(x)
+const mk1 = (id: string) => { class T extends (Key as any)()(id) { static get g() { return (this as any).of({ n: 1 }) } }; return T as any }
+class S1 extends mk1("S1") {}
+t("N1", () => S1.g)
+// same receiver, read first then call
+const mk2 = (id: string) => { class T extends (Key as any)()(id) { static get g() { const f = (this as any).of; return [typeof f, f.call(this, { n: 2 })] } }; return T as any }
+class S2 extends mk2("S2") {}
+t("N2", () => S2.g)
+// alias `this` into a local first (opencode's `const tag = this`)
+const mk4 = (id: string) => { class T extends (Key as any)()(id) { static get g() { const tag = this as any; return tag.of({ n: 4 }) } }; return T as any }
+class S4 extends mk4("S4") {}
+t("N4", () => S4.g)
+// nested, no subclass
+t("N5", () => mk1("T5").g)
+// top-level + subclass
+class T6 extends (Key as any)()("T6") { static get g() { return (this as any).of({ n: 6 }) } }
+class S6 extends T6 {}
+t("N6", () => S6.g)
+// top-level, no subclass
+t("N7", () => T6.g)
+// the closure-parent edge sits on an ancestor: inherited reads on a grandchild
+class T8 extends (Key as any)()("T8") {}
+class S8 extends T8 {}
+t("N8", () => [S8.key, (S8 as any).isK, typeof (S8 as any).of])
+// static METHOD with the same body
+const mk10 = (id: string) => { class T extends (Key as any)()(id) { static m() { return (this as any).of({ n: 10 }) } }; return T as any }
+class S10 extends mk10("S10") {}
+t("N10", () => S10.m())
+// calling the function a static getter returns, on a class extending a call expression
+const mk11 = (id: string) => { class T extends (Key as any)()(id) { static get g() { return () => 11 } }; return T as any }
+t("M1", () => mk11("T11").g())
+// the closure returned by a static getter calls tag.of (config-service.ts shape)
+const mk12 = (id: string) => { class T extends (Key as any)()(id) { static get layer() { const tag = this as any; return () => tag.of({ n: 12 }) } }; return T as any }
+class S12 extends mk12("S12") {}
+t("M2", () => { const thunk = S12.layer; return thunk() })
+"#;
+
+const EXPECTED: &str = "N1 {\"n\":1}
+N2 [\"function\",{\"n\":2}]
+N4 {\"n\":4}
+N5 {\"n\":1}
+N6 {\"n\":6}
+N7 {\"n\":6}
+N8 [\"T8\",true,\"function\"]
+N10 {\"n\":10}
+M1 11
+M2 {\"n\":12}
+";
+
+#[test]
+fn static_getter_calls_this_of_on_call_expression_heritage() {
+    let dir = tempfile::tempdir().expect("tempdir");
+    let entry = dir.path().join("main.ts");
+    let output = dir.path().join("main_bin");
+    std::fs::write(&entry, SOURCE).expect("write entry");
+
+    let compile = Command::new(perry_bin())
+        .current_dir(dir.path())
+        .arg("compile")
+        .arg(&entry)
+        .arg("-o")
+        .arg(&output)
+        .arg("--no-cache")
+        .env("PERRY_NO_AUTO_OPTIMIZE", "1")
+        .env("PERRY_RUNTIME_DIR", runtime_dir())
+        .output()
+        .expect("run perry compile");
+    assert!(
+        compile.status.success(),
+        "perry compile failed\nstdout:\n{}\nstderr:\n{}",
+        String::from_utf8_lossy(&compile.stdout),
+        String::from_utf8_lossy(&compile.stderr)
+    );
+
+    let run = Command::new(&output)
+        .current_dir(dir.path())
+        .output()
+        .expect("run compiled binary");
+    assert!(
+        run.status.success(),
+        "compiled binary failed\nstdout:\n{}\nstderr:\n{}",
+        String::from_utf8_lossy(&run.stdout),
+        String::from_utf8_lossy(&run.stderr)
+    );
+    assert_eq!(String::from_utf8_lossy(&run.stdout), EXPECTED);
+}
diff --git a/crates/perry/tests/source_graph_export_regressions.rs b/crates/perry/tests/source_graph_export_regressions.rs
index 12c85b80fe..c250983905 100644
--- a/crates/perry/tests/source_graph_export_regressions.rs
+++ b/crates/perry/tests/source_graph_export_regressions.rs
@@ -956,3 +956,5 @@ fn mixed_type_and_value_specifier_import_keeps_runtime_edge() {
 }
 #[path = "source_graph_export_regressions/issue_10160.rs"]
 mod issue_10160;
+#[path = "source_graph_export_regressions/issue_10197.rs"]
+mod issue_10197;
diff --git a/crates/perry/tests/source_graph_export_regressions/issue_10197.rs b/crates/perry/tests/source_graph_export_regressions/issue_10197.rs
new file mode 100644
index 0000000000..c6a9a66112
--- /dev/null
+++ b/crates/perry/tests/source_graph_export_regressions/issue_10197.rs
@@ -0,0 +1,41 @@
+//! `ns.member(...spread)` on a `const`-bound rest-parameter export must call
+//! the closure, not evaluate to it (#10197).
+
+use super::{compile_and_run, write};
+
+fn lib(dir: &std::path::Path) {
+    write(
+        dir,
+        "lib.ts",
+        "export const count = (...xs: any[]) => xs.length\n\
+         export const mergeAll = (...ctxs: any[]) => {\n\
+         \x20 const m = new Map()\n\
+         \x20 for (let i = 0; i < ctxs.length; i++) ctxs[i].mapUnsafe.forEach((v: any, k: any) => m.set(k, v))\n\
+         \x20 return { mapUnsafe: m }\n\
+         }\n\
+         export function countFn(...xs: any[]) { return xs.length }\n\
+         export const mk = (k: string) => ({ mapUnsafe: new Map([[k, k.length]]) })\n\
+         export const fill = (n: number, f: (i: number) => any) => { const out = new Array(n); for (let i = 0; i < n; i++) out[i] = f(i); return out }\n",
+    );
+}
+
+#[test]
+fn namespace_member_spread_call_invokes_const_rest_exports() {
+    let dir = tempfile::tempdir().unwrap();
+    lib(dir.path());
+    write(
+        dir.path(),
+        "main.ts",
+        "import * as Lib from \"./lib\"\n\
+         import { fill, mk } from \"./lib\"\n\
+         const other = fill(3, (i) => mk(\"k\".repeat(i + 1)))\n\
+         console.log(Lib.count(...other), Lib.count(0, ...other), Lib.countFn(...other), Lib.countFn(0, ...other))\n\
+         console.log(Lib.mergeAll(...other).mapUnsafe.size, (Lib as any)[\"mergeAll\"](...other).mapUnsafe.size)\n\
+         const inner = (context: any) => Lib.mergeAll(...(context as any))\n\
+         console.log(inner(other).mapUnsafe.size, Lib.mk(...([\"zz\"] as [string])).mapUnsafe.size)\n",
+    );
+    assert_eq!(
+        compile_and_run(dir.path(), "main.ts"),
+        "3 4 3 4\n3 3\n3 1\n"
+    );
+}