diff --git a/Cargo.lock b/Cargo.lock
index 9a58cb7..4aebc96 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2074,9 +2074,9 @@ dependencies = [
 
 [[package]]
 name = "rustls-webpki"
-version = "0.103.15"
+version = "0.103.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3c3cf1d8b1e7d4927e2d154c3fcb02979afb9939629c62cd9048d4f07b60ac2"
+checksum = "4443b1b6d39d7c663139942cc4558262562d2c84123bb6282ef177009ca8b281"
 dependencies = [
  "ring",
  "rustls-pki-types",
@@ -2888,9 +2888,9 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7dcd9d09a39985f5344844e66b0c530a33843579125f23e21e9f0f220850f22a"
+checksum = "1c1c8e20c8a38fc7d65abfe74eb7280e4aa667e8eec8bc84996d2874810748d9"
 dependencies = [
  "rustls-pki-types",
 ]
diff --git a/basis/src/tools/spawn.rs b/basis/src/tools/spawn.rs
index a0e534f..c7bff3e 100644
--- a/basis/src/tools/spawn.rs
+++ b/basis/src/tools/spawn.rs
@@ -26,7 +26,9 @@
 //! A task may also run *while the model keeps working* (ADR-0042): the
 //! `background` field beside the string starts it and returns its handle, and
 //! a call of `wait` alone — no string — collects one or more handles. Same
-//! door, same gate, two more typed facts; [`background`] has the lifecycle.
+//! door, same gate, two more typed facts. Completed tasks deliver their results
+//! automatically or through `wait`, and the parent turn joins unfinished tasks
+//! before it ends.
 //!
 //! # What the approver sees
 //!