vtcode 0.128.4

A Rust-based terminal coding agent with modular architecture supporting multiple LLM providers
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id: no-fmt-println
language: Go
severity: warning
message: Avoid `fmt.Println` in production code; use a structured logger.
note: |
  Direct console output via `fmt.Println` is not configurable and cannot be
  routed to log aggregators. Use `log/slog` (Go 1.21+) or a structured
  logging library for production code. `fmt.Println` is acceptable in
  tests, examples, and CLI tools.
rule:
  any:
    - pattern: fmt.Println($$$)
    - pattern: fmt.Printf($$$)
    - pattern: fmt.Fprintln(os.Stdout, $$$)
    - pattern: fmt.Fprint(os.Stdout, $$$)
    - pattern: fmt.Fprintf(os.Stdout, $$$)
files:
  - "**/*.go"
  - "!**/*_test.go"
  - "!**/examples/**"