docs(agents): add targeted lint/format commands to AGENTS.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ChughShilpa

AGENTS.md

@@ -128,6 +128,28 @@ make vet                      # Vet the Go code
 make golangci-lint            # Verify the Go code
 ```
 
+### Targeted lint/format
+
+For quick feedback on specific files or packages instead of running project-wide `make` targets:
+
+```bash
+# Go
+make golangci-lint-install                    # Install the linter (one-time setup)
+golangci-lint run ./pkg/controller/...        # Lint a single Go package (package-level)
+go vet ./pkg/controller/...                   # Vet a single Go package (package-level)
+gofmt -w path/to/file.go                      # Format a single Go file
+
+# Python
+pip install flake8 black isort               # Install Python linters (one-time setup)
+flake8 path/to/file.py                       # Lint a single Python file
+black path/to/file.py                        # Format a single Python file
+isort --profile black path/to/file.py        # Sort imports in a single Python file
+
+# Rust
+cargo fmt --manifest-path pkg/data_cache/Cargo.toml          # Format the data_cache crate (crate-level)
+cargo check --manifest-path pkg/data_cache/Cargo.toml        # Type-check the data_cache crate (crate-level)
+```
+
 **Code generation** (always run after modifying the APIs):
 
 ```bash