95 lines
2.3 KiB
Go
95 lines
2.3 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package agent
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import (
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"encoding/json"
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"fmt"
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"reflect"
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"github.com/google/jsonschema-go/jsonschema"
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)
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func jsonSchemaFor[T any]() (json.RawMessage, error) {
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t := reflect.TypeFor[T]()
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schema, err := jsonschema.ForType(t, nil)
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if err != nil {
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return nil, fmt.Errorf("cannot generate schema for %s: %w", t, err)
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}
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stripNullTypes(schema)
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data, err := json.Marshal(schema)
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if err != nil {
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return nil, fmt.Errorf("cannot marshal schema for %s: %w", t, err)
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}
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return json.RawMessage(data), nil
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}
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func mustJSONSchemaFor[T any]() json.RawMessage {
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schema, err := jsonSchemaFor[T]()
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if err != nil {
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panic(err)
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}
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return schema
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}
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// stripNullTypes removes "null" from union types produced by pointer fields
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// (e.g. ["null","string"] becomes "string") and clears integer bounds so that
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// LLM providers receive a clean schema without Go-specific type constraints.
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func stripNullTypes(s *jsonschema.Schema) {
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if s == nil {
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return
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}
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if len(s.Types) > 0 {
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filtered := make([]string, 0, len(s.Types))
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for _, t := range s.Types {
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if t != "null" {
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filtered = append(filtered, t)
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}
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}
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if len(filtered) == 1 {
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s.Type = filtered[0]
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s.Types = nil
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} else if len(filtered) > 1 {
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s.Types = filtered
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}
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}
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s.Minimum = nil
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s.Maximum = nil
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if s.Type == "object" && s.Properties == nil {
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s.Properties = make(map[string]*jsonschema.Schema)
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}
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for _, prop := range s.Properties {
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stripNullTypes(prop)
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}
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if s.Items != nil {
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stripNullTypes(s.Items)
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}
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if s.AdditionalProperties != nil {
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stripNullTypes(s.AdditionalProperties)
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}
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}
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