AIComputeStringToStringOp — Sparsi Library

Inputs

Field	Type	Description
`Input`	`*string`	Input string to transform

Outputs

Field	Type	Description
`Result`	`string`	Transformed string output

Reasoning is captured by WithReasoningLog — no graph output needed.

Params

Key	Type	Default	Description
`operation`	`string`	required	Full natural-language instruction for the transformation
`max_retries`	`string`	"3"	Number of retries on error

Typical Use Cases

Translation to another language
Tone adjustment (formal → casual, passive → active)
Template filling from a context string
Text reformatting (prose → bullet points, etc.)
Any string→string AI task without a specific op

Most flexible AI op. When the output type is a known structured value, prefer a more specific op: AIBoolOp for yes/no, AIScoreOp for 0–1 scores, AIExtractStringSliceOp for lists. Use this op when the output is free-form text.

Complete Runnable Example

Translates an English business sentence to Spanish using a plain-language operation instruction.

main.go

package main

import (
	"context"
	"encoding/json"
	"log"
	"os"
	"time"

	"github.com/akennis/sparsi-go/library"
	_ "github.com/akennis/dagor/operator/builtin"

	"github.com/panjf2000/ants/v2"
	"github.com/akennis/dagor"
	"github.com/akennis/dagor/graph"
)

func main() {
	input := "The quarterly revenue exceeded expectations by a significant margin."

	library.RegisterConst("input_val", input)

	g, err := graph.NewBuilder("translate_demo").
		Vertex("src").Op("input_val").
		Output("Result", "input_wire").

		Vertex("translate").Op("AIComputeStringToStringOp").
		Params(map[string]string{
			"operation": "translate this text to Spanish, preserving a professional tone",
		}).
		Input("Input", "input_wire").
		Output("Result", "translated").

		Build()
	if err != nil {
		log.Fatalf("build: %v", err)
	}

	pool, err := ants.NewPool(4)
	if err != nil {
		log.Fatalf("pool: %v", err)
	}
	defer pool.Release()

	eng, err := dagor.NewEngine(g, pool)
	if err != nil {
		log.Fatalf("engine: %v", err)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
	defer cancel()

	if err := eng.Run(ctx); err != nil {
		log.Fatalf("run: %v", err)
	}

	out := map[string]any{}
	if raw, ok := eng.GetOutput("translated"); ok {
		out["result"] = *raw.(*string)
	}

	enc := json.NewEncoder(os.Stdout)
	enc.SetIndent("", "  ")
	enc.Encode(out)
}