Fix missing cycles features in guest in host command

Summary:

Test Plan:

Update `test_sdk.sh` to catch missing feature bugs.

.github/workflows/ci.yml

@@ -57,15 +57,14 @@ jobs:
       - uses: actions/checkout@v4
       - run: rustup target add riscv32i-unknown-none-elf
       - run: assets/scripts/smoke.sh examples/src/bin/fib3_profiling.rs
-      - run: assets/scripts/smoke.sh examples/src/bin/hello.rs
 
   test-sdk:
     needs: check-build
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - run: rustup target add riscv32i-unknown-none-elf
-      - run: assets/scripts/test_sdk.sh examples/src/bin/hello.rs
+      - run: assets/scripts/test_sdk.sh examples/src/bin/fib3_profiling.rs
 
   detect-unused-crate:
     runs-on: ubuntu-latest

assets/scripts/test_sdk.sh

@@ -2,7 +2,8 @@
 set -e
 
 ORIGINAL_DIR=$(pwd)
-PROJECT_NAME="/tmp/nexus-host-ci"
+PROJECT_NAME="/tmp/nexus-host-ci1"
+CARGO_NEXUS="$(pwd)/target/release/cargo-nexus"
 
 function usage() {
     echo "Usage: $0 <file.rs>"
@@ -40,9 +41,9 @@ cargo build --release --package cargo-nexus --bin cargo-nexus
 
 function create_nexus_project() {
     if [[ -z "${GITHUB_SHA}" ]]; then
-        ./target/release/cargo-nexus nexus host "$PROJECT_NAME"
+        $CARGO_NEXUS nexus host "$PROJECT_NAME"
     else
-        ./target/release/cargo-nexus nexus host "$PROJECT_NAME" --rev "${GITHUB_SHA}"
+        $CARGO_NEXUS nexus host "$PROJECT_NAME" --rev "${GITHUB_SHA}"
     fi
 }
 
@@ -52,6 +53,12 @@ cp "$1" "$PROJECT_NAME/src/guest/src/main.rs"
 
 function run_project() {
 cargo update
+
+# Test the cycles feature inside the guest project
+pushd src/guest
+$CARGO_NEXUS nexus run
+popd
+
 cargo run --release
 }
 

cli/src/command/host.rs

@@ -140,6 +140,8 @@ fn setup_crate(host_path: PathBuf, rev: Option<String>, tag: Option<String>) ->
             "# Generated by cargo-nexus, do not remove!\n",
             "#\n",
             "# This profile is used for generating proofs, as Nexus VM support for compiler optimizations is still under development.\n",
+            "[features]\n",
+            "cycles = [] # Enable cycle counting for run command\n",
         )
     )?;