diff --git a/proto/generate_protobufs.sh b/proto/generate_protobufs.sh
new file mode 100755
index 0000000..a8015ca
--- /dev/null
+++ b/proto/generate_protobufs.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+mkdir -p clients/flutter/lib/src/generated
+protoc --experimental_allow_proto3_optional --dart_out=grpc:clients/flutter/lib/src/generated -Iproto proto/orchestrator.proto
+dart format clients/flutter/lib/src/generated
+(cd clients/dummy_client && cargo build || echo clients/dummy_client not found, possibly due to a sparse checkout.)
+(cd clients/cli && cargo build || echo clients/cli not found, possibly due to a sparse checkout.)
+(cd orchestrator && cargo build || echo orchestrator/ not found, possibly due a sparse checkout.)
diff --git a/proto/orchestrator.proto b/proto/orchestrator.proto
new file mode 100644
index 0000000..7e5f119
--- /dev/null
+++ b/proto/orchestrator.proto
@@ -0,0 +1,150 @@
+// Copyright (c) 2024 Nexus. All rights reserved.
+//
+// If you use this protocol to communicate with Nexus's servers,
+// you must agree to the Terms of Service: https://nexus.xyz/tos
+
+syntax = "proto3";
+
+package nexus.orchestrator;
+
+service Orchestrator {
+  // Request a proof for a program.
+  rpc RequestProof(ProofRequest) returns (ProofResponse) {}
+
+  // Compile a Rust program to an ELF binary for use by clients that don't
+  // support compiling programs themselves.
+  rpc Compile(CompileRequest) returns (CompileResponse) {}
+
+  // Register a supply node with the network of compute governed by the
+  // orchestrator.
+  rpc AddProver(stream ProverRequest) returns (stream ProverResponse) {}
+}
+
+message ProofRequest {
+  CompiledProgram program = 1;
+
+  VMProgramInput input = 2;
+
+  // Step of the trace to start the proof, inclusive.
+  //
+  // If missing, proving starts at the beginning of the trace.
+  optional int32 step_to_start = 3;
+
+  // Number of steps for this proof request.
+  //
+  // If zero, proving is skipped. If missing, all steps are proved.
+  optional int32 steps_to_prove = 4;
+}
+
+message ProofResponse {
+  Proof proof = 1;
+}
+
+// A message that always represents a program runnable on the Nexus VM.
+message CompiledProgram {
+  oneof program {
+    // ELF binary containing a program to be proved, expressed in the RV32I ISA.
+    bytes rv32i_elf_bytes = 1;
+  }
+}
+
+message VMProgramInput {
+  oneof input {
+    // Input expressed as raw bytes to be read as-is off of the input tape.
+    bytes raw_bytes = 1;
+  }
+}
+
+message Proof {
+  oneof proof {
+    bytes nova_bytes = 1;
+  }
+}
+
+message ProgramSource {
+  // The source code to be compiled. There will be a variety of languages and
+  // ways to express everything a program needs for compilation (dependencies,
+  // multiple files, etc.) as our scope expands.
+  oneof source {
+    // Option to use when the program in question can be expressed as a single
+    // rust file (i.e., a program written in the playground).
+    string rust_single_file = 1;
+  }
+}
+
+message CompileRequest {
+  ProgramSource source = 1;
+}
+
+message CompileResponse {
+  CompiledProgram program = 1;
+}
+
+message Progress {
+  // Completion status expressed as a number between zero and one,
+  // inclusive.
+  float completed_fraction = 1;
+
+  // The total size of the execution trace in steps.
+  int32 steps_in_trace = 2;
+
+  // The number of steps of the execution trace to be proven.
+  int32 steps_to_prove = 3;
+
+  // The number of steps proven so far.
+  int32 steps_proven = 4;
+}
+
+// Streamed messages sent to the orchestrator to keep it updated with the
+// prover's status.
+message ProverRequest {
+  oneof contents {
+    // Details about this supply node for use by the orchestrator.
+    ProverRequestRegistration registration = 1;
+
+    // A completed proof.
+    Proof proof = 2;
+
+    // Periodic progress update for the current proof.
+    Progress progress = 3;
+
+    // Periodic liveness indicator when no proof is being computed.
+    Heartbeat heartbeat = 4;
+  }
+}
+
+enum ProverType {
+  // Experimental new prover types should leave the prover type unspecified.
+  PROVER_TYPE_UNSPECIFIED = 0;
+
+  // The default prover type, used for volunteered compute resources.
+  PROVER_TYPE_VOLUNTEER = 1;
+
+  // Provers running on public continuous integration.
+  // May restrict the types of programs that can be assigned.
+  PROVER_TYPE_CI = 2;
+}
+
+// Metadata that helps the orchestrator schedule work to the requesting compute
+// supplier.
+message ProverRequestRegistration {
+  // What type of prover this is.
+  ProverType prover_type = 1;
+
+  // A unique identifier for this prover, generated by the prover.
+  //
+  // Distict provers must not share an identifier; do not use a constant value.
+  string prover_id = 2;
+
+  // The number of proof cycles that this prover expects to compute
+  // over the course of one second. Proof cycles are proof steps times k.
+  optional double estimated_proof_cycles_hertz = 3;
+}
+
+message ProverResponse {
+  // Forward the literal request for now
+  ProofRequest to_prove = 1;
+}
+
+message Heartbeat {
+}