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File-Monitor Integration Status

Date: 2025-10-06 Status: ⚠️ Partially Integrated (Code organized, build pending)

Summary​

The file-monitor Rust module has been extracted from ZIP files and organized into the project structure. The code is in place but requires Docker container build integration due to system dependencies.

Integration Steps Completed​

✅ 1. Code Organization​

  • Source code: Moved to src/file-monitor/
  • Documentation: Moved to docs/file-monitor/
  • Duplicates removed: Consolidated production.md to docs/

✅ 2. cargo.toml Fix​

  • Issue: Referenced missing benches/monitoring_bench.rs
  • Fix: Commented out [[bench]] section (lines 45-47)
  • Result: Manifest parsing now succeeds

✅ 3. .gitignore Updates​

Added Rust-specific patterns:

# Rust build artifacts (file-monitor)
src/file-monitor/target/
src/file-monitor/Cargo.lock
*.wasm

Build Blockers​

⚠️ Missing System Dependencies​

Error:

Could not find directory of OpenSSL installation
error: failed to run custom build command for `openssl-sys v0.9.109`

Required packages (need root access):

  • pkg-config
  • libssl-dev (OpenSSL development headers)

Why local build failed:

  • Container runs as non-root user hal
  • System packages require sudo
  • Build environment doesn't have OpenSSL dev libraries

Next Steps​

Add Rust toolchain to Dockerfile:

# Stage 1: Rust builder
FROM rust:1.90 as rust-builder
WORKDIR /build
COPY src/file-monitor/ ./
RUN cargo build --release

# Stage 2: Node.js builder
FROM node:20-slim as node-builder
# ... existing Node.js build ...

# Stage 3: Production
FROM debian:bookworm-slim
RUN apt-get update && apt-get install -y \
    libssl3 \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

COPY --from=rust-builder /build/target/release/file-monitor /usr/local/bin/
# ... rest of production image ...

Option 2: Pre-Built Binary​

Build outside container and commit binary:

# On system with Rust + OpenSSL dev libs
cd src/file-monitor
cargo build --release
cp target/release/file-monitor ../../bin/

Then add to .gitignore:

# Except pre-built file-monitor
!bin/file-monitor

Option 3: Separate Build Script​

Create scripts/build-file-monitor.sh:

#!/bin/bash
docker run --rm \
  -v $(pwd)/src/file-monitor:/build \
  rust:1.90 \
  bash -c "cd /build && cargo build --release"

File-Monitor Module Details​

Source Files (11 files)​

src/file-monitor/
├── cargo.toml (941 bytes) - ✅ Fixed
├── src/
│   ├── lib.rs - Public API
│   ├── monitor.rs - Main orchestrator (320 lines)
│   ├── processor.rs - Event pipeline (280 lines)
│   ├── checksum.rs - SHA-256 streaming (180 lines)
│   ├── rate_limiter.rs - Backpressure control (160 lines)
│   ├── debouncer.rs - Event deduplication (150 lines)
│   ├── lifecycle.rs - Graceful shutdown (280 lines)
│   ├── observability.rs - Metrics/tracing (180 lines)
│   ├── config.rs - Configuration (240 lines)
│   ├── events.rs - Event types (180 lines)
│   └── error.rs - Error handling (70 lines)
├── tests/
│   └── integration_tests.rs (400 lines)
├── examples/
│   └── monitor.rs (250 lines)
└── .github/workflows/ci.yml

Documentation (7 files, ~80k)​

docs/file-monitor/
├── README.md - User guide
├── executive-summary.md (21k) - Technical overview
├── implementation-summary.md (13k) - Before/after comparison
├── project-overview.md (11k) - Architecture deep-dive
├── delivery-summary.md (8.8k) - Deliverable summary
├── DOCUMENTATION_index.md (6.9k) - Navigation guide
├── production.md (11k) - Deployment guide
└── adr/
    └── 001-event-processing-architecture.md - Design decisions

Dependencies (from cargo.toml)​

Core:

  • tokio 1.35 (async runtime, full features)
  • notify 6.1 (file system watching, FSEvents for macOS)
  • serde 1.0, serde_json 1.0 (serialization)

Utilities:

  • uuid 1.6 (event IDs)
  • chrono 0.4 (timestamps)
  • sha2 0.10 (checksums)

Observability:

  • tracing 0.1, tracing-subscriber 0.3 (logging)
  • metrics 0.21, metrics-exporter-prometheus 0.13 (Prometheus)

Error Handling:

  • thiserror 1.0, anyhow 1.0

Integration with Agentic System​

From ADR-022 (Agent File Operations) and ADR-023 (Agentic Monitoring):

Current Architecture​

Agent System
├── Coordinator Agent
├── Code Generation Agent
├── Code Review Agent
└── Testing Agent

With File-Monitor Integration​

Agent System
├── Coordinator Agent
│   └── Uses file-monitor for workspace tracking
├── Code Generation Agent
│   └── Triggers file-monitor on file writes
├── Code Review Agent
│   └── Receives file-monitor events for review triggers
└── Testing Agent
    └── Monitors test file changes via file-monitor

Event Flow​

  1. Agent writes file → TypeScript file operation
  2. File-monitor detects → Rust notify watcher
  3. Event processed → Debouncing + rate limiting
  4. Checksum calculated → Streaming SHA-256 (if configured)
  5. Event emitted → JSON over stdout/IPC
  6. Agent system receives → TypeScript EventEmitter
  7. Coordinator routes → To appropriate agent

Performance Characteristics​

From docs/file-monitor/executive-summary.md:

ScenarioEvents/secCPUMemoryLatency (p99)
Idle0<1%5 MBN/A
Light (10 evt/s)102%10 MB2ms
Moderate (100 evt/s)1008%25 MB5ms
Heavy (1000 evt/s)100025%60 MB15ms
With checksums (100 evt/s)10015%30 MB25ms

Testing​

Integration Tests (15+ scenarios)​

Located in src/file-monitor/tests/integration_tests.rs:

  • Basic file operations (create, modify, delete)
  • Recursive monitoring
  • Debouncing effectiveness
  • Rate limiting under load
  • Graceful shutdown
  • Checksum calculation
  • Cross-platform compatibility

Running Tests (after build succeeds)​

cd src/file-monitor
cargo test
cargo test -- --nocapture  # With output

Update deployment/Dockerfile to include Rust build stage:

  1. Add Rust builder stage
  2. Build file-monitor in Docker
  3. Copy binary to production image
  4. Update docker-compose.yml if needed

This ensures:

  • ✅ Consistent build environment
  • ✅ All dependencies installed (pkg-config, libssl-dev)
  • ✅ Cross-platform builds (Linux target)
  • ✅ CI/CD integration ready

References​

  • ADR-022: Agent File Operations (docs/adr/ADR-022-agent-file-operations.md)
  • ADR-023: Agentic Monitoring (docs/adr/ADR-023-agentic-monitoring.md)
  • File-Monitor Docs: docs/file-monitor/
  • Source Code: src/file-monitor/

Status: Ready for Docker build integration Blocker: System dependencies (pkg-config, libssl-dev) Solution: Multi-stage Docker build with Rust toolchain