Add AGENTS.md and AI tool configs for agentic development readiness

.aider.conf.yml

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+read: AGENTS.md

.gemini/settings.json

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+{
+  "context": {
+    "fileName": "AGENTS.md"
+  }
+}

AGENTS.md

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+# AGENTS.md — AI Agent Instructions for migtools/oadp-cli
+
+## Project Overview
+OADP CLI is a kubectl plugin (`kubectl oadp`) that provides a command-line interface for OADP (OpenShift API for Data Protection) operations. It simplifies backup, restore, and data protection management tasks. Supports cross-architecture builds and distributed as platform-specific binaries.
+
+- **Primary Language**: Go
+- **Module**: `github.com/migtools/oadp-cli`
+- **Default Branch**: `oadp-dev`
+
+## Build Instructions
+```bash
+# Build the kubectl plugin binary
+make build
+
+# Build and install to ~/.local/bin
+make install
+
+# Install to ~/bin
+make install-bin
+
+# Install to /usr/local/bin (requires sudo)
+make install-system
+
+# Build for a specific platform
+make build PLATFORM=linux/amd64
+
+# Build for all platforms (release)
+make release-build
+
+# Create release archives with checksums
+make release-archives
+```
+
+## Test Instructions
+```bash
+# Run all tests
+make test
+
+# Run unit tests only
+make test-unit
+
+# Run integration tests only
+make test-integration
+
+# Run specific tests
+go test ./internal/... -run TestName
+go test ./cmd/... -run TestName
+
+# Vet code
+go vet ./...
+```
+
+## Linting
+```bash
+# Run golangci-lint
+make lint
+
+# Run golangci-lint with auto-fix and formatting
+make lint-fix
+```
+
+Configuration: `.golangci.yml`
+
+## Code Conventions
+- kubectl plugin pattern (binary named `kubectl-oadp`)
+- Commands in `cmd/` directory using cobra
+- Internal packages in `internal/`
+- Documentation in `docs/`
+- Follow Go conventions for CLI tools
+- Error messages should be user-friendly (this is a user-facing tool)
+
+## Project Structure
+```
+cmd/           - CLI command definitions (cobra commands)
+  root.go      - Root command and global flags
+  backup/      - Backup subcommands
+  restore/     - Restore subcommands
+internal/      - Private packages
+  client/      - Kubernetes client helpers
+  util/        - Utility functions
+docs/          - User documentation and guides
+```
+
+## CI/CD
+- GitHub Actions workflows in `.github/workflows/`:
+  - `cross-arch-build-test.yml` — Cross-architecture build testing
+  - `lint.yml` — Linting checks
+  - `test.yml` — Test suite
+  - `release.yml` — Release automation
+- Linter config: `.golangci.yml`
+- Reproduce CI locally:
+  ```bash
+  make build
+  make lint
+  make test
+  ```
+
+## Common Tasks
+
+### Adding a new CLI command
+1. Create a new cobra command in `cmd/`
+2. Add subcommand to the parent command registration
+3. Implement logic in `internal/` packages
+4. Add unit tests
+5. Update documentation in `docs/`
+
+### Uninstalling
+```bash
+make uninstall       # User locations
+make uninstall-system # System locations
+make uninstall-all   # All locations
+```
+
+### Creating a release
+```bash
+make release  # Builds all platforms and creates tar.gz archives with SHA256 checksums
+```
+
+### Checking build status
+```bash
+make status  # Shows build status and installation info
+```