diff --git a/.bazelrc b/.bazelrc
index fa5ba0b8ab0..05f620c6124 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -5,6 +5,10 @@ startup --windows_enable_symlinks
 common --enable_bzlmod
 common --announce_rc
 common --show_progress_rate_limit=15
+# crate_universe re-fetches git dependencies on every splice. libgit2 indexes
+# asupersync's ~1 GB history on one thread for over 25 minutes; the git CLI
+# indexes it in about 2.
+common --repo_env=CARGO_NET_GIT_FETCH_WITH_CLI=true
 # MODULE.bazel registers only nightly/2026-09-27. Without this, rules_rust
 # resolves the stable channel and the build fails closed.
 build --@rules_rust//rust/toolchain/channel=nightly
diff --git a/Cargo.lock b/Cargo.lock
index 9b5db24e8d9..5b8667f3bc9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -272,9 +272,8 @@ dependencies = [
 
 [[package]]
 name = "asupersync"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f34b1a19ffd6b74570339a156912436335bb09c594c675c62ea164b19a1f2511"
+version = "0.6.0"
+source = "git+https://github.com/Dicklesworthstone/asupersync?rev=432e2c3b2cf2bad02fc88e380d29a6b0b5c01422#432e2c3b2cf2bad02fc88e380d29a6b0b5c01422"
 dependencies = [
  "aes-gcm",
  "asupersync-macros",
@@ -328,9 +327,8 @@ dependencies = [
 
 [[package]]
 name = "asupersync-macros"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b00d5ceff520908bcb2fa6efacf2ab6a0ae45639e87eb1de70b78df13acf636"
+version = "0.6.0"
+source = "git+https://github.com/Dicklesworthstone/asupersync?rev=432e2c3b2cf2bad02fc88e380d29a6b0b5c01422#432e2c3b2cf2bad02fc88e380d29a6b0b5c01422"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1147,7 +1145,7 @@ dependencies = [
  "ciborium",
  "clap",
  "criterion-plot",
- "itertools 0.13.0",
+ "itertools",
  "num-traits",
  "oorandom",
  "page_size",
@@ -1168,7 +1166,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d8d80a2f4f5b554395e47b5d8305bc3d27813bacb73493eb1001e8f76dae29ea"
 dependencies = [
  "cast",
- "itertools 0.13.0",
+ "itertools",
 ]
 
 [[package]]
@@ -1772,9 +1770,8 @@ dependencies = [
 
 [[package]]
 name = "franken-decision"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b01c92bbc04816e42bc68dbf697777e83d87fc00e9ad5cec70a5c86331d834b3"
+version = "0.6.0"
+source = "git+https://github.com/Dicklesworthstone/asupersync?rev=432e2c3b2cf2bad02fc88e380d29a6b0b5c01422#432e2c3b2cf2bad02fc88e380d29a6b0b5c01422"
 dependencies = [
  "franken-evidence",
  "franken-kernel",
@@ -1783,9 +1780,8 @@ dependencies = [
 
 [[package]]
 name = "franken-evidence"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccdd9e8e38746aa524dd8b22a35aa7c1485379156d3a145d077521e80ce429de"
+version = "0.6.0"
+source = "git+https://github.com/Dicklesworthstone/asupersync?rev=432e2c3b2cf2bad02fc88e380d29a6b0b5c01422#432e2c3b2cf2bad02fc88e380d29a6b0b5c01422"
 dependencies = [
  "serde",
  "serde_json",
@@ -1793,9 +1789,8 @@ dependencies = [
 
 [[package]]
 name = "franken-kernel"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbe470e8d7f35572ff1571ac02cb14486a77bc8a98ac6830eb8756ba4a869c0a"
+version = "0.6.0"
+source = "git+https://github.com/Dicklesworthstone/asupersync?rev=432e2c3b2cf2bad02fc88e380d29a6b0b5c01422#432e2c3b2cf2bad02fc88e380d29a6b0b5c01422"
 dependencies = [
  "serde",
 ]
@@ -2342,7 +2337,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1c48eccd894bd15555b0346470e63491ded94aefe76b3fcb1052084b5a393238"
 dependencies = [
  "bstr",
- "hashbrown 0.17.1",
+ "hashbrown 0.16.1",
 ]
 
 [[package]]
@@ -3433,15 +3428,6 @@ dependencies = [
  "either",
 ]
 
-[[package]]
-name = "itertools"
-version = "0.14.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
-dependencies = [
- "either",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.18"
@@ -4427,7 +4413,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b570b25f7617e43d59005d0990ccb79e950a423952cea19671b7a876da390adf"
 dependencies = [
  "anyhow",
- "itertools 0.14.0",
+ "itertools",
  "proc-macro2",
  "quote",
  "syn 2.0.119",
diff --git a/Cargo.toml b/Cargo.toml
index 6f56fe4d9a9..0e5ec71607f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -70,7 +70,8 @@ version = "1.0.0-beta.87"
 # nightly-outcome-try is an asupersync default (Outcome's Try impls). It
 # compiles only on the pinned nightly. native-runtime stays explicit because
 # it is not part of that default set.
-asupersync = { version = "=0.5.0", default-features = false, features = ["proc-macros", "native-runtime", "nightly-outcome-try"] }
+# Switch back to `version = "=0.6.0"` once 0.6.0 is published to crates.io (#3874).
+asupersync = { git = "https://github.com/Dicklesworthstone/asupersync", rev = "432e2c3b2cf2bad02fc88e380d29a6b0b5c01422", default-features = false, features = ["proc-macros", "native-runtime", "nightly-outcome-try"] }
 # grafeo 0.5.43 from our fork (ScriptedAlchemy/grafeo, main). The
 # published crates carry a tiered-storage
 # arena whose `HotVersionRef` addresses a single 1 MiB chunk, which caps an
diff --git a/crates/tracedecay-cli/src/main.rs b/crates/tracedecay-cli/src/main.rs
index 5a9a995cd82..73296bb42cf 100644
--- a/crates/tracedecay-cli/src/main.rs
+++ b/crates/tracedecay-cli/src/main.rs
@@ -1,3 +1,4 @@
+#![recursion_limit = "256"]
 #![allow(clippy::too_many_arguments, clippy::collapsible_if)]
 // binary crate: match lib allow policy for CLI dispatch
 use clap::{ArgMatches, CommandFactory, FromArgMatches};
diff --git a/crates/tracedecay-daemon-protocol/src/lib.rs b/crates/tracedecay-daemon-protocol/src/lib.rs
index 2a751e734aa..f9cd2e44a20 100644
--- a/crates/tracedecay-daemon-protocol/src/lib.rs
+++ b/crates/tracedecay-daemon-protocol/src/lib.rs
@@ -1,3 +1,4 @@
+#![recursion_limit = "256"]
 //! Daemon invocation wire contract, authenticated client, and leaf transport.
 //!
 //! This crate sits below the composition root. It owns request/response
diff --git a/crates/tracedecay-runtime-core/src/operation_task_owner.rs b/crates/tracedecay-runtime-core/src/operation_task_owner.rs
index 0d62776ba56..4e2809c92c5 100644
--- a/crates/tracedecay-runtime-core/src/operation_task_owner.rs
+++ b/crates/tracedecay-runtime-core/src/operation_task_owner.rs
@@ -527,7 +527,10 @@ mod tests {
 
     #[test]
     fn construction_rejects_native_runtime_without_blocking_pool() {
-        let runtime = RuntimeBuilder::current_thread().build().unwrap();
+        let runtime = RuntimeBuilder::current_thread()
+            .blocking_threads(0, 0)
+            .build()
+            .unwrap();
         runtime.block_on(async {
             assert!(matches!(
                 RuntimeOperationTaskOwnerV1::new(runtime.handle()),