feat: isolate sim flag into core

[lherman-cs]

No description provided.

[Copilot]

Pull request overview

This PR refactors the codebase to isolate simulation-specific code into a new pulsebeam-core crate, removing the sim feature flag from individual crates and centralizing conditional compilation logic. The PR also introduces a UdpMode enum to distinguish between batch and scalar UDP transport modes.

• Introduces pulsebeam-core crate to centralize simulation-specific networking abstractions
• Adds UdpMode enum to Transport to differentiate between batch (sendmmsg/GSO) and scalar (send_to) UDP modes
• Removes sim feature flags from pulsebeam, pulsebeam-runtime, and pulsebeam-agent crates

Reviewed changes

Copilot reviewed 20 out of 22 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pulsebeam-core/Cargo.toml	New crate manifest with optional sim feature that enables turmoil and axum dependencies
pulsebeam-core/src/lib.rs	Module declaration for the new core crate
pulsebeam-core/src/net.rs	Conditional exports for networking types based on sim feature, including TurmoilListener wrapper for axum integration
pulsebeam/Cargo.toml	Removes sim feature and turmoil dependency, adds pulsebeam-core dependency
pulsebeam/src/node.rs	Removes turmoil_listener module, uses TcpListener from pulsebeam-core, updates UDP binding to use UdpMode::Batch
pulsebeam/src/controller.rs	Updates Transport::Udp pattern match to handle new UdpMode parameter
pulsebeam/src/participant/core.rs	Updates Transport::Udp pattern match to handle new UdpMode parameter
pulsebeam-runtime/Cargo.toml	Removes sim feature and turmoil dependency, adds pulsebeam-core dependency
pulsebeam-runtime/src/net/mod.rs	Adds UdpMode enum, updates Transport enum to include UdpMode, adds UdpScalar variants to UnifiedSocket enums, implements udp_scalar binding logic
pulsebeam-runtime/src/net/udp.rs	Updates to use UdpMode in Transport enum, sets transport mode in RecvPacketBatch
pulsebeam-runtime/src/net/udp_scalar.rs	New module implementing scalar UDP operations using pulsebeam-core networking primitives
pulsebeam-runtime/src/net/tcp.rs	Updates imports to use TcpListener and TcpStream from pulsebeam-core
pulsebeam-agent/Cargo.toml	Removes sim feature and turmoil dependency, adds pulsebeam-core dependency
pulsebeam-agent/src/actor.rs	Updates imports to use UdpSocket from pulsebeam-core
pulsebeam-cli/Cargo.toml	Adds pulsebeam-core dependency
pulsebeam-cli/src/main.rs	Updates import to use UdpSocket from pulsebeam-core
pulsebeam-simulator/Cargo.toml	Removes sim features from dependencies, adds pulsebeam-core with sim feature
Cargo.toml	Adds pulsebeam-core to workspace members, removes default-members section
Cargo.lock	Reflects dependency changes across all crates
Makefile	Simplifies build target, adds separate profile target, adds test-all and test-sim targets
.github/workflows/ci.yml	Updates to use make commands for testing instead of direct cargo commands

Comments suppressed due to low confidence (1)

pulsebeam-runtime/src/net/udp_scalar.rs:57

• The transport mode should be UdpMode::Scalar instead of UdpMode::Batch. This is in the scalar UDP module (udp_scalar.rs) which uses standard send_to for lower latency, so the transport field should reflect that it's using scalar mode, not batch mode.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

The transport mode should be UdpMode::Batch instead of UdpMode::Scalar. This is in the batch UDP module (udp.rs) which uses sendmmsg/GSO for higher throughput, so the transport field should reflect that it's using batch mode, not scalar mode.

Suggested change

	transport: Transport::Udp(UdpMode::Scalar),
	transport: Transport::Udp(UdpMode::Batch),