feat(pierre): add diff chunking and configurable review settings

cmd/pierre/main.go

@@ -37,7 +37,19 @@ type LLMConfig struct {
 	Model    string `help:"Model to use" env:"LLM_MODEL"`
 }
 
+// ReviewConfig holds the review‑specific CLI options.
+// The `default:"60000"` tag sets an integer default of 60 KB – Kong parses the string value into the int field, which can be confusing for readers.
+type ReviewConfig struct {
+	MaxChunkSize    int      `help:"Maximum diff chunk size in bytes" default:"60000"`
+	Guidelines      []string `help:"Project guidelines to prepend" sep:","`
+	DisableComments bool     `help:"Disable posting comments (dry run)"`
+}
+
 type Config struct {
+	// Embedding ReviewConfig with a prefix changes flag names to `--review-…`.
+	// Existing configuration files using the old flag names will need to be updated.
+	// Consider keeping backwards compatibility if required.
+	Review      ReviewConfig    `embed:"" prefix:"review-"`
 	GitProvider string          `help:"Git provider (bitbucket or gitea)" env:"GIT_PROVIDER"`
 	Bitbucket   BitbucketConfig `embed:"" prefix:"bitbucket-"`
 	Gitea       GiteaConfig     `embed:"" prefix:"gitea-"`
@@ -117,7 +129,7 @@ func main() {
 		log.Fatalf("Error initializing AI: %v", err)
 	}
 
-	pierreService := pierre.New(ai, git)
+	pierreService := pierre.New(ai, git, cfg.Review.MaxChunkSize, cfg.Review.Guidelines, cfg.Review.DisableComments)
 	if err := pierreService.MakeReview(context.Background(), cfg.Repo.Owner, cfg.Repo.Repo, cfg.Repo.PRID); err != nil {
 		log.Fatalf("Error during review: %v", err)
 	}