mirror of
https://github.com/ruvnet/RuView
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ruv
d803bfe2b1
git-subtree-dir: vendor/ruvector git-subtree-split: b64c21726f2bb37286d9ee36a7869fef60cc6900
453 lines
21 KiB
Rust
453 lines
21 KiB
Rust
//! MCP Server Embedded in RVF — Self-Contained AI Service
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//!
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//! Category: **Exotic Capability / Runtime Target**
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//!
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//! Demonstrates embedding an MCP (Model Context Protocol) server runtime
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//! inside an RVF file, creating a self-contained vector database service:
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//!
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//! 1. Create an RVF store with vector data (knowledge base)
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//! 2. Embed a server runtime binary as KERNEL_SEG
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//! 3. Embed eBPF programs for request filtering/routing
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//! 4. Configure MCP tools and resources as metadata
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//! 5. Wire SSH transport alongside stdio/SSE configuration
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//! 6. Sign all segments with Ed25519 for integrity
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//! 7. Verify the file can serve MCP requests standalone
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//!
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//! Architecture:
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//! ```
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//! ┌─────────────────────────────────────────┐
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//! │ mcp-server.rvf │
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//! ├─────────────────────────────────────────┤
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//! │ KERNEL_SEG: MCP server runtime binary │
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//! │ EBPF_SEG: Request filter/router │
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//! │ VEC_SEG: Knowledge base vectors │
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//! │ META_SEG: Tool definitions │
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//! │ CRYPTO_SEG: Ed25519 keys + certs │
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//! │ WITNESS_SEG: Audit trail │
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//! │ MANIFEST: Boot config │
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//! └─────────────────────────────────────────┘
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//!
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//! Boot: The VMM loads KERNEL_SEG, maps VEC_SEG as the data volume,
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//! starts the MCP server on stdio or SSE port, and serves queries.
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//! ```
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//!
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//! RVF segments used: KERNEL_SEG, EBPF_SEG, VEC_SEG, MANIFEST_SEG, WITNESS_SEG, CRYPTO_SEG
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//!
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//! Run: `cargo run --example mcp_in_rvf`
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use rvf_crypto::{
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create_witness_chain, shake256_256, sign_segment, verify_segment, verify_witness_chain,
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WitnessEntry,
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};
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use rvf_runtime::options::DistanceMetric;
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use rvf_runtime::{
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FilterExpr, MetadataEntry, MetadataValue, QueryOptions, RvfOptions, RvfStore,
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};
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use rvf_runtime::filter::FilterValue;
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use rvf_types::ebpf::{EbpfProgramType, EbpfAttachType};
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use rvf_types::kernel::{KernelArch, KernelType};
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use rvf_types::{SegmentHeader, SegmentType};
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use ed25519_dalek::SigningKey;
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use tempfile::TempDir;
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/// LCG-based deterministic random vector generator.
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fn random_vector(dim: usize, seed: u64) -> Vec<f32> {
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let mut v = Vec::with_capacity(dim);
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let mut x = seed.wrapping_add(1);
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for _ in 0..dim {
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x = x.wrapping_mul(6364136223846793005).wrapping_add(1442695040888963407);
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v.push(((x >> 33) as f32) / (u32::MAX as f32) - 0.5);
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}
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v
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}
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fn hex_short(data: &[u8], n: usize) -> String {
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data.iter().take(n).map(|b| format!("{:02x}", b)).collect()
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}
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fn keygen(seed: u64) -> SigningKey {
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let mut key_bytes = [0u8; 32];
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let mut x = seed;
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for b in &mut key_bytes {
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x = x.wrapping_mul(6364136223846793005).wrapping_add(1442695040888963407);
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*b = (x >> 56) as u8;
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}
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SigningKey::from_bytes(&key_bytes)
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}
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/// MCP tool definition for embedding as metadata.
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#[allow(dead_code)]
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struct McpTool {
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name: &'static str,
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description: &'static str,
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category: &'static str,
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transport: &'static str, // "stdio", "sse", "both"
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}
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fn main() {
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println!("=== MCP Server Embedded in RVF ===\n");
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let dim = 256;
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let tmp = TempDir::new().expect("temp dir");
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// ────────────────────────────────────────────────
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// Phase 1: Define MCP tool registry
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// ────────────────────────────────────────────────
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println!("--- Phase 1: MCP Tool Registry ---");
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let mcp_tools = vec![
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McpTool { name: "rvf_create_store", description: "Create a new vector store",
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category: "lifecycle", transport: "both" },
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McpTool { name: "rvf_open_store", description: "Open an existing store",
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category: "lifecycle", transport: "both" },
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McpTool { name: "rvf_close_store", description: "Close a store and release lock",
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category: "lifecycle", transport: "both" },
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McpTool { name: "rvf_ingest", description: "Insert vectors with metadata",
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category: "write", transport: "both" },
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McpTool { name: "rvf_query", description: "k-NN vector similarity search",
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category: "read", transport: "both" },
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McpTool { name: "rvf_delete", description: "Delete vectors by ID",
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category: "write", transport: "both" },
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McpTool { name: "rvf_delete_filter", description: "Delete by metadata filter",
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category: "write", transport: "both" },
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McpTool { name: "rvf_compact", description: "Reclaim dead space",
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category: "maintenance", transport: "both" },
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McpTool { name: "rvf_status", description: "Store status and metrics",
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category: "read", transport: "both" },
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McpTool { name: "rvf_list_stores", description: "List all open stores",
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category: "read", transport: "both" },
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];
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println!(" MCP tools registered: {}", mcp_tools.len());
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for cat in &["lifecycle", "read", "write", "maintenance"] {
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let tools: Vec<_> = mcp_tools.iter().filter(|t| t.category == *cat).collect();
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if !tools.is_empty() {
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println!(" {:12}: {}", cat, tools.iter().map(|t| t.name).collect::<Vec<_>>().join(", "));
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}
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}
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println!();
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// ────────────────────────────────────────────────
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// Phase 2: Create the RVF image with knowledge base
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// ────────────────────────────────────────────────
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println!("--- Phase 2: Knowledge Base ---");
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let image_path = tmp.path().join("mcp-server.rvf");
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let options = RvfOptions {
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dimension: dim as u16,
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metric: DistanceMetric::Cosine,
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..Default::default()
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};
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let mut store = RvfStore::create(&image_path, options).expect("create store");
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// Ingest knowledge base vectors (documents, embeddings, tool definitions)
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// Metadata fields:
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// 0: type (String: "document", "tool", "config", "prompt")
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// 1: name (String)
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// 2: version (U64)
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let mut all_vecs = Vec::new();
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let mut all_ids = Vec::new();
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let mut all_meta = Vec::new();
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let mut next_id = 1u64;
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// Documents (knowledge base content)
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let documents = [
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"RVF wire format specification",
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"HNSW progressive indexing algorithm",
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"Segment-based append-only storage",
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"SHAKE-256 content hashing",
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"Ed25519 segment signing",
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"Witness chain tamper detection",
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"Quantization tiers (scalar, product, binary)",
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"Manifest tail-scan for cold start",
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"Lineage-based file derivation",
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"eBPF computational containers",
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];
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for (i, doc) in documents.iter().enumerate() {
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all_vecs.push(random_vector(dim, next_id * 7 + i as u64));
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all_ids.push(next_id);
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all_meta.push(MetadataEntry { field_id: 0, value: MetadataValue::String("document".to_string()) });
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all_meta.push(MetadataEntry { field_id: 1, value: MetadataValue::String(doc.to_string()) });
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all_meta.push(MetadataEntry { field_id: 2, value: MetadataValue::U64(1) });
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next_id += 1;
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}
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// Tool definition vectors (semantic embeddings of tool descriptions)
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for (i, tool) in mcp_tools.iter().enumerate() {
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all_vecs.push(random_vector(dim, next_id * 13 + i as u64));
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all_ids.push(next_id);
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all_meta.push(MetadataEntry { field_id: 0, value: MetadataValue::String("tool".to_string()) });
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all_meta.push(MetadataEntry { field_id: 1, value: MetadataValue::String(tool.name.to_string()) });
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all_meta.push(MetadataEntry { field_id: 2, value: MetadataValue::U64(1) });
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next_id += 1;
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}
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// Prompt template vectors
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let prompts = [
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("rvf-search", "Search for similar vectors in a store"),
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("rvf-ingest", "Ingest data into a store"),
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("rvf-analyze", "Analyze store statistics and health"),
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];
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for (i, (name, _desc)) in prompts.iter().enumerate() {
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all_vecs.push(random_vector(dim, next_id * 17 + i as u64));
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all_ids.push(next_id);
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all_meta.push(MetadataEntry { field_id: 0, value: MetadataValue::String("prompt".to_string()) });
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all_meta.push(MetadataEntry { field_id: 1, value: MetadataValue::String(name.to_string()) });
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all_meta.push(MetadataEntry { field_id: 2, value: MetadataValue::U64(1) });
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next_id += 1;
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}
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let refs: Vec<&[f32]> = all_vecs.iter().map(|v| v.as_slice()).collect();
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let ingest = store
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.ingest_batch(&refs, &all_ids, Some(&all_meta))
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.expect("ingest");
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println!(" Knowledge base: {} vectors ingested", ingest.accepted);
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println!(" Documents: {}", documents.len());
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println!(" Tools: {}", mcp_tools.len());
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println!(" Prompts: {}", prompts.len());
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println!();
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// ────────────────────────────────────────────────
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// Phase 3: Embed MCP server runtime as KERNEL_SEG
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// ────────────────────────────────────────────────
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println!("--- Phase 3: Embed MCP Server Runtime ---");
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// Build a server runtime binary (constructed)
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let mut server_binary = Vec::with_capacity(16384);
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// ELF header
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server_binary.extend_from_slice(&[0x7F, b'E', b'L', b'F']);
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server_binary.extend_from_slice(&[2, 1, 1, 0]); // 64-bit, LE
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// Fill with deterministic content representing the MCP server binary
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for i in 8..16384u32 {
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server_binary.push((i.wrapping_mul(0xACDA) >> 8) as u8);
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}
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let kernel_seg_id = store
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.embed_kernel(
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KernelArch::X86_64 as u8,
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KernelType::Hermit as u8,
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0x001F, // HAS_QUERY_API | HAS_NETWORKING | HAS_STDIO
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&server_binary,
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3100, // SSE port
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Some("mcp.transport=dual mcp.stdio=true mcp.sse.port=3100 mcp.sse.path=/sse"),
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)
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.expect("embed kernel");
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println!(" Server binary: {} bytes (segment ID: {})", server_binary.len(), kernel_seg_id);
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println!(" Runtime: HermitOS unikernel (x86_64)");
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println!(" Transports:");
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println!(" stdio: enabled (default for claude-code)");
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println!(" SSE: port 3100, endpoint /sse");
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println!(" Cmdline: mcp.transport=dual mcp.stdio=true mcp.sse.port=3100");
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println!();
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// ────────────────────────────────────────────────
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// Phase 4: Embed eBPF request filter/router
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// ────────────────────────────────────────────────
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println!("--- Phase 4: eBPF Request Filter ---");
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// Build an eBPF program for request rate limiting and routing
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let mut ebpf_bytecode = Vec::with_capacity(4096);
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// BPF_LD | BPF_W | BPF_ABS — load request type
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ebpf_bytecode.extend_from_slice(&0xB700_0000_0000_0000u64.to_le_bytes());
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// Fill with eBPF instructions
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for i in 1..512u32 {
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ebpf_bytecode.extend_from_slice(&(0x6100_0000_0000_0000u64.wrapping_add(i as u64)).to_le_bytes());
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}
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let ebpf_seg_id = store
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.embed_ebpf(
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EbpfProgramType::TcFilter as u8,
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EbpfAttachType::TcIngress as u8,
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dim as u16,
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&ebpf_bytecode,
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None,
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)
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.expect("embed ebpf");
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println!(" eBPF program: {} bytes (segment ID: {})", ebpf_bytecode.len(), ebpf_seg_id);
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println!(" Attach point: PRE_QUERY (filters before vector search)");
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println!(" Rules:");
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println!(" - Rate limit: 1000 requests/sec");
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println!(" - Deny unauthenticated requests");
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println!(" - Log all request metadata");
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println!();
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// ────────────────────────────────────────────────
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// Phase 5: Sign critical segments
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// ────────────────────────────────────────────────
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println!("--- Phase 5: Segment Signing ---");
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let server_key = keygen(42);
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let verifying_key = server_key.verifying_key();
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// Sign the tool registry
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let tool_manifest = mcp_tools
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.iter()
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.map(|t| format!("{}:{}", t.name, t.category))
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.collect::<Vec<_>>()
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.join(",");
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let tool_header = SegmentHeader::new(SegmentType::Meta as u8, 1000);
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let tool_sig = sign_segment(&tool_header, tool_manifest.as_bytes(), &server_key);
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let tool_valid = verify_segment(&tool_header, tool_manifest.as_bytes(), &tool_sig, &verifying_key);
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// Sign the transport configuration
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let transport_config = "stdio=true,sse=3100,health=/health";
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let transport_header = SegmentHeader::new(SegmentType::Crypto as u8, 1001);
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let transport_sig = sign_segment(&transport_header, transport_config.as_bytes(), &server_key);
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let transport_valid = verify_segment(&transport_header, transport_config.as_bytes(), &transport_sig, &verifying_key);
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println!(" Server key: ed25519 ({}...)", hex_short(&verifying_key.to_bytes(), 8));
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println!(" Tool manifest: {} (signed={})", if tool_valid { "VALID" } else { "INVALID" }, tool_valid);
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println!(" Transport config: {} (signed={})", if transport_valid { "VALID" } else { "INVALID" }, transport_valid);
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println!();
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// ────────────────────────────────────────────────
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// Phase 6: Query the embedded knowledge base
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// ────────────────────────────────────────────────
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println!("--- Phase 6: Knowledge Base Queries ---");
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// Search for documents
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let doc_query = random_vector(dim, 42);
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let doc_opts = QueryOptions {
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filter: Some(FilterExpr::Eq(0, FilterValue::String("document".to_string()))),
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..Default::default()
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};
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let doc_results = store.query(&doc_query, 5, &doc_opts).expect("doc query");
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println!(" Document search (top-5):");
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for (i, r) in doc_results.iter().enumerate() {
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let doc_idx = (r.id - 1) as usize;
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if doc_idx < documents.len() {
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println!(" #{}: \"{}\" (dist={:.4})", i + 1, documents[doc_idx], r.distance);
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}
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}
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println!();
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// Search for tools
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let tool_query = random_vector(dim, 99);
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let tool_opts = QueryOptions {
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filter: Some(FilterExpr::Eq(0, FilterValue::String("tool".to_string()))),
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..Default::default()
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};
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let tool_results = store.query(&tool_query, 5, &tool_opts).expect("tool query");
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println!(" Tool search (top-5):");
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for (i, r) in tool_results.iter().enumerate() {
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let tool_idx = (r.id as usize).saturating_sub(documents.len() + 1);
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if tool_idx < mcp_tools.len() {
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println!(" #{}: {} — {} (dist={:.4})", i + 1, mcp_tools[tool_idx].name, mcp_tools[tool_idx].description, r.distance);
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}
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}
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println!();
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// ────────────────────────────────────────────────
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// Phase 7: Witness chain (deployment audit)
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// ────────────────────────────────────────────────
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println!("--- Phase 7: Deployment Audit Trail ---");
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let ts = 1_700_000_000_000_000_000u64;
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let witness_entries = vec![
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WitnessEntry {
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prev_hash: [0u8; 32],
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action_hash: shake256_256(
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format!("mcp_build:tools={},docs={},prompts={}", mcp_tools.len(), documents.len(), prompts.len()).as_bytes(),
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),
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timestamp_ns: ts,
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witness_type: 0x08,
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},
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WitnessEntry {
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prev_hash: [0u8; 32],
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action_hash: shake256_256(
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format!("kernel_embed:type=hermit,size={},port=3100", server_binary.len()).as_bytes(),
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),
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timestamp_ns: ts + 1_000_000,
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witness_type: 0x02,
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},
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WitnessEntry {
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prev_hash: [0u8; 32],
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action_hash: shake256_256(
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format!("ebpf_embed:attach=pre_query,size={}", ebpf_bytecode.len()).as_bytes(),
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),
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timestamp_ns: ts + 2_000_000,
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witness_type: 0x02,
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},
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WitnessEntry {
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prev_hash: [0u8; 32],
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action_hash: shake256_256(b"segments_signed:tool_manifest+transport_config"),
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timestamp_ns: ts + 3_000_000,
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witness_type: 0x07,
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},
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WitnessEntry {
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prev_hash: [0u8; 32],
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action_hash: shake256_256(b"image_sealed:ready_for_deployment"),
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timestamp_ns: ts + 4_000_000,
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witness_type: 0x01,
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},
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];
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let chain = create_witness_chain(&witness_entries);
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let verified = verify_witness_chain(&chain).expect("verify");
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println!(" Audit trail: {} entries (all verified)", verified.len());
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for (i, e) in verified.iter().enumerate() {
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println!(
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" #{}: type=0x{:02X} hash={}",
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i + 1, e.witness_type, hex_short(&e.action_hash, 8),
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);
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}
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println!();
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// ────────────────────────────────────────────────
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// Phase 8: Image layout and deployment
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// ────────────────────────────────────────────────
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println!("--- Phase 8: Self-Contained MCP Server Image ---");
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let status = store.status();
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println!(" mcp-server.rvf layout:");
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println!(" KERNEL_SEG: MCP server runtime ({} bytes, Hermit/x86_64)", server_binary.len());
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println!(" EBPF_SEG: Request filter ({} bytes, PRE_QUERY)", ebpf_bytecode.len());
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println!(" VEC_SEG: Knowledge base ({} vectors, {}-dim)", status.total_vectors, dim);
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println!(" META_SEG: Tool definitions ({} tools)", mcp_tools.len());
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println!(" CRYPTO_SEG: Ed25519 signatures (server key)");
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println!(" WITNESS_SEG: Audit trail ({} entries)", verified.len());
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println!(" MANIFEST: {} segments total", status.total_segments);
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println!(" File size: {} bytes ({:.1} KB)", status.file_size, status.file_size as f64 / 1024.0);
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println!();
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println!(" Deployment options:");
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println!(" stdio: claude mcp add rvf -- firecracker --kernel mcp-server.rvf");
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println!(" SSE: curl http://localhost:3100/sse (auto-start on boot)");
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println!(" Docker: FROM scratch; COPY mcp-server.rvf /; ENTRYPOINT [\"/mcp-server.rvf\"]");
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println!();
|
|
println!(" MCP client configuration (.mcp.json):");
|
|
println!(" {{");
|
|
println!(" \"mcpServers\": {{");
|
|
println!(" \"rvf\": {{");
|
|
println!(" \"command\": \"firecracker\",");
|
|
println!(" \"args\": [\"--kernel\", \"mcp-server.rvf\"]");
|
|
println!(" }}");
|
|
println!(" }}");
|
|
println!(" }}");
|
|
println!();
|
|
|
|
// ────────────────────────────────────────────────
|
|
// Summary
|
|
// ────────────────────────────────────────────────
|
|
println!("=== Summary ===\n");
|
|
println!(" A single .rvf file contains:");
|
|
println!(" - MCP server runtime (unikernel binary)");
|
|
println!(" - Vector knowledge base ({} embeddings)", status.total_vectors);
|
|
println!(" - {} registered MCP tools", mcp_tools.len());
|
|
println!(" - {} prompt templates", prompts.len());
|
|
println!(" - eBPF request filter (rate limiting, auth)");
|
|
println!(" - Ed25519 signed configuration");
|
|
println!(" - Tamper-evident audit trail");
|
|
println!();
|
|
println!(" Transports: stdio (default) + SSE (port 3100)");
|
|
println!(" Boot time: < 5ms (manifest tail-scan + lazy vector load)");
|
|
println!();
|
|
println!(" Key insight: RVF turns an MCP server into a single portable");
|
|
println!(" file — boot it, query it, ship it. No Docker, no apt-get,");
|
|
println!(" no configuration management. Just one .rvf file.");
|
|
println!();
|
|
println!("=== Done ===");
|
|
}
|