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fix: add proxy_ prefix handling for tool_reference content blocks (#1)

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applyClaudeToolPrefix, stripClaudeToolPrefixFromResponse, and
stripClaudeToolPrefixFromStreamLine now handle "tool_reference" blocks
(field "tool_name") in addition to "tool_use" blocks (field "name").

Without this fix, tool_reference blocks in conversation history retain
their original unprefixed names while tool definitions carry the proxy_
prefix, causing Anthropic API 400 errors: "Tool reference 'X' not found
in available tools."

Co-authored-by: Kirill Turanskiy <kt@novamedia.ru>
This commit is contained in:
Kirill Turanskiy
2026-02-16 03:35:38 +03:00
committed by Kirill Turanskiy
parent 453aaf8774
commit 98f0a3e3bd
2 changed files with 92 additions and 23 deletions
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48
internal/runtime/executor/claude_executor.go
View File

@@ -784,15 +784,22 @@ func applyClaudeToolPrefix(body []byte, prefix string) []byte {
return true
}
content.ForEach(func(contentIndex, part gjson.Result) bool {
if part.Get("type").String() != "tool_use" {
return true
}
partType := part.Get("type").String()
if partType == "tool_use" {
name := part.Get("name").String()
if name == "" || strings.HasPrefix(name, prefix) {
return true
}
path := fmt.Sprintf("messages.%d.content.%d.name", msgIndex.Int(), contentIndex.Int())
body, _ = sjson.SetBytes(body, path, prefix+name)
} else if partType == "tool_reference" {
toolName := part.Get("tool_name").String()
if toolName == "" || strings.HasPrefix(toolName, prefix) {
return true
}
path := fmt.Sprintf("messages.%d.content.%d.tool_name", msgIndex.Int(), contentIndex.Int())
body, _ = sjson.SetBytes(body, path, prefix+toolName)
}
return true
})
return true
@@ -811,15 +818,22 @@ func stripClaudeToolPrefixFromResponse(body []byte, prefix string) []byte {
return body
}
content.ForEach(func(index, part gjson.Result) bool {
if part.Get("type").String() != "tool_use" {
return true
}
partType := part.Get("type").String()
if partType == "tool_use" {
name := part.Get("name").String()
if !strings.HasPrefix(name, prefix) {
return true
}
path := fmt.Sprintf("content.%d.name", index.Int())
body, _ = sjson.SetBytes(body, path, strings.TrimPrefix(name, prefix))
} else if partType == "tool_reference" {
toolName := part.Get("tool_name").String()
if !strings.HasPrefix(toolName, prefix) {
return true
}
path := fmt.Sprintf("content.%d.tool_name", index.Int())
body, _ = sjson.SetBytes(body, path, strings.TrimPrefix(toolName, prefix))
}
return true
})
return body
@@ -834,17 +848,35 @@ func stripClaudeToolPrefixFromStreamLine(line []byte, prefix string) []byte {
return line
}
contentBlock := gjson.GetBytes(payload, "content_block")
if !contentBlock.Exists() || contentBlock.Get("type").String() != "tool_use" {
if !contentBlock.Exists() {
return line
}
blockType := contentBlock.Get("type").String()
var updated []byte
var err error
if blockType == "tool_use" {
name := contentBlock.Get("name").String()
if !strings.HasPrefix(name, prefix) {
return line
}
updated, err := sjson.SetBytes(payload, "content_block.name", strings.TrimPrefix(name, prefix))
updated, err = sjson.SetBytes(payload, "content_block.name", strings.TrimPrefix(name, prefix))
if err != nil {
return line
}
} else if blockType == "tool_reference" {
toolName := contentBlock.Get("tool_name").String()
if !strings.HasPrefix(toolName, prefix) {
return line
}
updated, err = sjson.SetBytes(payload, "content_block.tool_name", strings.TrimPrefix(toolName, prefix))
if err != nil {
return line
}
} else {
return line
}
trimmed := bytes.TrimSpace(line)
if bytes.HasPrefix(trimmed, []byte("data:")) {

37
internal/runtime/executor/claude_executor_test.go
View File

@@ -25,6 +25,18 @@ func TestApplyClaudeToolPrefix(t *testing.T) {
}
}
func TestApplyClaudeToolPrefix_WithToolReference(t *testing.T) {
input := []byte(`{"tools":[{"name":"alpha"}],"messages":[{"role":"user","content":[{"type":"tool_reference","tool_name":"beta"},{"type":"tool_reference","tool_name":"proxy_gamma"}]}]}`)
out := applyClaudeToolPrefix(input, "proxy_")
if got := gjson.GetBytes(out, "messages.0.content.0.tool_name").String(); got != "proxy_beta" {
t.Fatalf("messages.0.content.0.tool_name = %q, want %q", got, "proxy_beta")
}
if got := gjson.GetBytes(out, "messages.0.content.1.tool_name").String(); got != "proxy_gamma" {
t.Fatalf("messages.0.content.1.tool_name = %q, want %q", got, "proxy_gamma")
}
}
func TestApplyClaudeToolPrefix_SkipsBuiltinTools(t *testing.T) {
input := []byte(`{"tools":[{"type":"web_search_20250305","name":"web_search"},{"name":"my_custom_tool","input_schema":{"type":"object"}}]}`)
out := applyClaudeToolPrefix(input, "proxy_")
@@ -49,6 +61,18 @@ func TestStripClaudeToolPrefixFromResponse(t *testing.T) {
}
}
func TestStripClaudeToolPrefixFromResponse_WithToolReference(t *testing.T) {
input := []byte(`{"content":[{"type":"tool_reference","tool_name":"proxy_alpha"},{"type":"tool_reference","tool_name":"bravo"}]}`)
out := stripClaudeToolPrefixFromResponse(input, "proxy_")
if got := gjson.GetBytes(out, "content.0.tool_name").String(); got != "alpha" {
t.Fatalf("content.0.tool_name = %q, want %q", got, "alpha")
}
if got := gjson.GetBytes(out, "content.1.tool_name").String(); got != "bravo" {
t.Fatalf("content.1.tool_name = %q, want %q", got, "bravo")
}
}
func TestStripClaudeToolPrefixFromStreamLine(t *testing.T) {
line := []byte(`data: {"type":"content_block_start","content_block":{"type":"tool_use","name":"proxy_alpha","id":"t1"},"index":0}`)
out := stripClaudeToolPrefixFromStreamLine(line, "proxy_")
@@ -61,3 +85,16 @@ func TestStripClaudeToolPrefixFromStreamLine(t *testing.T) {
t.Fatalf("content_block.name = %q, want %q", got, "alpha")
}
}
func TestStripClaudeToolPrefixFromStreamLine_WithToolReference(t *testing.T) {
line := []byte(`data: {"type":"content_block_start","content_block":{"type":"tool_reference","tool_name":"proxy_beta"},"index":0}`)
out := stripClaudeToolPrefixFromStreamLine(line, "proxy_")
payload := bytes.TrimSpace(out)
if bytes.HasPrefix(payload, []byte("data:")) {
payload = bytes.TrimSpace(payload[len("data:"):])
}
if got := gjson.GetBytes(payload, "content_block.tool_name").String(); got != "beta" {
t.Fatalf("content_block.tool_name = %q, want %q", got, "beta")
}
}