diff --git a/Cargo.toml b/Cargo.toml
index 0954500..f79544c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,11 @@ default-members = ["host"]
 # until the end of P1, the spikes, and the userland (its own wasm32-wasip2 workspace).
 exclude = ["cli", "interface", "sdk", "agent", "examples", "spikes", "userland"]
 
+# Line tables only: backtraces keep file and line, binaries stay small (each test
+# binary links V8, Wasmtime and deno_core). Set `debug = true` when you need a debugger.
+[profile.dev]
+debug = "line-tables-only"
+
 # Wasmtime compiles components with Cranelift. Optimize dependencies in dev
 # builds, so that tests and debug runs start guests quickly.
 [profile.dev.package."*"]