Files
probo/pkg/agent/typed.go
Bryan Frimin 1f5e68abe6 Fix typeName panic for interface type parameters
reflect.TypeOf on a nil interface value returns nil, causing a
panic when Kind() is called. Use reflect.TypeFor[T]() instead,
which resolves the type directly from the type parameter.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>
2026-03-13 19:34:07 +01:00

84 lines
1.9 KiB
Go

// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
package agent
import (
"context"
"encoding/json"
"fmt"
"reflect"
"strings"
"go.probo.inc/probo/pkg/llm"
)
type TypedResult[T any] struct {
Result
Output T
}
func RunTyped[T any](
ctx context.Context,
a *Agent,
messages []llm.Message,
) (*TypedResult[T], error) {
typed := a.clone()
schema, err := jsonSchemaFor[T]()
if err != nil {
return nil, fmt.Errorf("cannot create typed runner: %w", err)
}
typed.responseFormat = &llm.ResponseFormat{
Type: llm.ResponseFormatJSONSchema,
JSONSchema: &llm.JSONSchema{
Name: typeName[T](),
Schema: schema,
Strict: true,
},
}
result, err := typed.Run(ctx, messages)
if err != nil {
return nil, err
}
text := result.FinalMessage().Text()
var output T
if err := json.Unmarshal([]byte(text), &output); err != nil {
return nil, fmt.Errorf("cannot parse typed output: %w", err)
}
return &TypedResult[T]{
Result: *result,
Output: output,
}, nil
}
func typeName[T any]() string {
t := reflect.TypeFor[T]()
if t.Kind() == reflect.Pointer {
t = t.Elem()
}
name := t.Name()
if name == "" {
name = "output"
}
return strings.ToLower(name)
}