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+# Pullpiri (Vehicle Service Orchestrator)
+
+**ALWAYS reference these instructions first. If you encounter unexpected information not covered here, you may: (1) search the project documentation, codebase, or official resources; (2) use only the bash commands explicitly listed in this document or standard diagnostic commands (e.g., `ls`, `cat`, `pwd`). If these steps do not resolve your issue, escalate by contacting a maintainer or opening an issue.**
+
+Pullpiri is a Rust-based vehicle service orchestrator framework designed to enable efficient deployment and management of cloud-native in-vehicle services and applications. It uses a microservices architecture with server, agent, and player components that work together to orchestrate containerized workloads.
+
+## Working Effectively
+
+### Bootstrap and Build - NEVER CANCEL BUILDS
+- **CRITICAL**: All build and dependency commands below require long timeouts. NEVER CANCEL these operations.
+- Install dependencies: `scripts/installdeps.sh` -- takes 8-10 minutes. NEVER CANCEL. Set timeout to 15+ minutes.
+- Build all components: `export PATH="$HOME/.cargo/bin:$PATH" && make build` -- takes 5-7 minutes. NEVER CANCEL. Set timeout to 15+ minutes.
+- Format check: `export PATH="$HOME/.cargo/bin:$PATH" && scripts/fmt_check.sh` -- takes 1-2 seconds.
+- Lint check: `export PATH="$HOME/.cargo/bin:$PATH" && scripts/clippy_check.sh` -- takes 2-3 minutes. NEVER CANCEL. Set timeout to 10+ minutes.
+
+### Environment Setup Requirements
+- **Operating System**: Tested on CentOS Stream 9, Ubuntu 20.04+
+- **Required Dependencies**: Automatically installed by `scripts/installdeps.sh`:
+  - Rust toolchain (rustup, cargo, clippy, rustfmt)
+  - etcd v3.5.11 and etcdctl
+  - protobuf-compiler
+  - libdbus-1-dev, libssl-dev, pkg-config
+  - Docker and Docker Compose
+  - cargo-deny, cargo2junit
+- **Ports Used**: 47001-47099 (gRPC: 47001+, REST: up to 47099), etcd: 2379, 2380
+
+### Build Process
+- **Direct Build**: Use `make build` for development builds
+- **Release Build**: Use `make release` for optimized builds  
+- **Clean**: Use `make clean` to clean all build artifacts
+- **Build Time**: Expect 5-7 minutes for full build. Dependencies download adds 2-3 minutes on first build.
+
+### Container Operations
+- **Builder Images**: `make builder` -- builds development container images. May require elevated permissions.
+- **Runtime Images**: `make image` -- builds final container images for deployment.
+- **Install Services**: `make install` -- deploys containers as systemd services. Requires root/sudo.
+- **Uninstall Services**: `make uninstall` -- stops and removes deployed services.
+- **Container Build Issues**: Container builds may fail with permission errors in some environments. Use direct Rust builds instead.
+
+## Validation and Testing
+
+### Pre-commit Validation - ALWAYS RUN THESE
+- **ALWAYS run these commands before committing changes:**
+  1. `export PATH="$HOME/.cargo/bin:$PATH" && scripts/fmt_check.sh`
+  2. `export PATH="$HOME/.cargo/bin:$PATH" && scripts/clippy_check.sh`
+  3. `export PATH="$HOME/.cargo/bin:$PATH" && make build`
+
+### Testing
+- **Unit Tests**: `cargo test` in any crate directory (src/common, src/server, src/agent, src/player, src/tools)
+- **Integration Tests**: Use `scripts/testNparse.sh` -- WARNING: Requires external dependencies and may fail in restricted environments
+- **Manual Service Testing**: After building, you can run individual components:
+  - Server: `cargo run --manifest-path=src/server/apiserver/Cargo.toml`
+  - Agent: `cargo run --manifest-path=src/agent/nodeagent/Cargo.toml`  
+  - Player: `cargo run --manifest-path=src/player/filtergateway/Cargo.toml`
+
+### Validation Scenarios
+- **After making changes to any Rust code:**
+  1. Run formatting check: `scripts/fmt_check.sh`
+  2. Run linting: `scripts/clippy_check.sh` 
+  3. Build affected component: `cargo build --manifest-path=src/{component}/Cargo.toml`
+  4. Run unit tests: `cargo test --manifest-path=src/{component}/Cargo.toml`
+
+## Project Structure and Navigation
+
+### Key Directories and Files
+```
+src/
+├── common/           # Shared utilities and gRPC definitions
+├── server/
+│   ├── apiserver/    # Main REST API server (port 47099)
+│   ├── policymanager/# Policy management service
+│   └── monitoringserver/ # Monitoring service
+├── agent/
+│   └── nodeagent/    # Node agent for workload management
+├── player/
+│   ├── filtergateway/    # Gateway service (port 47002)
+│   ├── actioncontroller/ # Action controller (port 47001)
+│   └── statemanager/     # State management service
+└── tools/
+    ├── ppr/          # Package management tool
+    ├── yamlvalidator/ # YAML validation tool
+    └── idl2rs/       # IDL to Rust generator
+
+scripts/              # Build and CI scripts
+containers/           # Docker/Podman container definitions
+examples/             # Example scenarios and configurations
+doc/                  # Documentation
+settings.yaml         # Main configuration file
+```
+
+### Important Configuration Files
+- `settings.yaml` -- Main configuration (etcd endpoints, storage paths, networking)
+- `Cargo.toml` files -- Rust project definitions in each component directory
+- `containers/piccolo-*.yaml` -- Systemd service definitions for container deployment
+
+## Common Development Tasks
+
+### Adding New Features
+1. Identify the component to modify (server, agent, player, tools)
+2. Make changes in the appropriate `src/{component}/` directory
+3. **ALWAYS** run formatting: `scripts/fmt_check.sh`
+4. **ALWAYS** run linting: `scripts/clippy_check.sh`
+5. Build and test: `cargo build && cargo test` in the component directory
+6. Test integration with other components if applicable
+
+### Working with Dependencies
+- Add new Rust dependencies to the appropriate `Cargo.toml` file
+- System dependencies should be added to `scripts/installdeps.sh`
+- After adding dependencies, rebuild: `make build`
+
+### Debugging Services
+- Check etcd health: `etcdctl --endpoints=http://localhost:2379 endpoint health`
+- View service logs when using containers: `podman logs {container-name}`
+- For development, run services directly with `cargo run` for better debugging output
+
+## Troubleshooting
+
+### Common Issues
+- **Build fails with missing dependencies**: Run `scripts/installdeps.sh` to install all required dependencies
+- **etcd connection errors**: Ensure etcd is running with `etcdctl endpoint health`
+- **Container permission errors**: Use direct Rust builds instead of container builds in restricted environments
+- **Port conflicts**: Check that ports 47001-47099 and 2379-2380 are available
+- **Formatting/linting failures**: Run `cargo fmt` and `cargo clippy --fix` in the specific component directory
+
+### Build Time Expectations
+- **Dependency installation**: 8-10 minutes (first time only)
+- **Full build**: 5-7 minutes
+- **Incremental build**: 1-3 minutes
+- **Formatting check**: 1-2 seconds
+- **Linting check**: 2-3 minutes
+- **Container image build**: 10-20 minutes (if permissions allow)
+
+### Environment Limitations
+- Container builds may not work in all environments due to permission restrictions
+- Full integration tests require external services that may not be available
+- Some advanced features require root access for systemd service management
+- Multi-node functionality requires additional network configuration
+
+## Quick Reference Commands
+
+### Daily Development Workflow
+```bash
+# Set up environment (once per session)
+export PATH="$HOME/.cargo/bin:$PATH"
+
+# Before making changes
+make build                    # Verify current state
+scripts/fmt_check.sh         # Check formatting
+scripts/clippy_check.sh      # Check linting
+
+# After making changes
+scripts/fmt_check.sh         # Fix formatting
+scripts/clippy_check.sh      # Fix linting issues
+make build                   # Verify build works
+cargo test --manifest-path=src/{component}/Cargo.toml  # Test your component
+```
+
+### Essential Validation Sequence
+1. `scripts/fmt_check.sh` (1-2 seconds)
+2. `scripts/clippy_check.sh` (2-3 minutes, NEVER CANCEL)
+3. `make build` (5-7 minutes, NEVER CANCEL)
+4. Component-specific `cargo test` (varies by component)
+
+Always run this sequence before committing changes to ensure CI pipeline success.
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