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fix: skip proxy_ prefix for built-in tools in message history

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The proxy_ prefix logic correctly skips built-in tools (those with a
non-empty "type" field) in tools[] definitions but does not skip them
in messages[].content[] tool_use blocks or tool_choice. This causes
web_search in conversation history to become proxy_web_search, which
Anthropic does not recognize.

Fix: collect built-in tool names from tools[] into a set and also
maintain a hardcoded fallback set (web_search, code_execution,
text_editor, computer) for cases where the built-in tool appears in
history but not in the current request's tools[] array. Skip prefixing
in messages and tool_choice when name matches a built-in.
This commit is contained in:
Kirill Turanskiy
2026-02-17 21:42:32 +03:00
parent 453aaf8774
commit 7cc725496e
2 changed files with 97 additions and 8 deletions
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14
internal/runtime/executor/claude_executor.go
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@@ -753,11 +753,21 @@ func applyClaudeToolPrefix(body []byte, prefix string) []byte {
return body
}
// Collect built-in tool names (those with a non-empty "type" field) so we can
// skip them consistently in both tools and message history.
builtinTools := map[string]bool{}
for _, name := range []string{"web_search", "code_execution", "text_editor", "computer"} {
builtinTools[name] = true
}
if tools := gjson.GetBytes(body, "tools"); tools.Exists() && tools.IsArray() {
tools.ForEach(func(index, tool gjson.Result) bool {
// Skip built-in tools (web_search, code_execution, etc.) which have
// a "type" field and require their name to remain unchanged.
if tool.Get("type").Exists() && tool.Get("type").String() != "" {
if n := tool.Get("name").String(); n != "" {
builtinTools[n] = true
}
return true
}
name := tool.Get("name").String()
@@ -772,7 +782,7 @@ func applyClaudeToolPrefix(body []byte, prefix string) []byte {
if gjson.GetBytes(body, "tool_choice.type").String() == "tool" {
name := gjson.GetBytes(body, "tool_choice.name").String()
if name != "" && !strings.HasPrefix(name, prefix) {
if name != "" && !strings.HasPrefix(name, prefix) && !builtinTools[name] {
body, _ = sjson.SetBytes(body, "tool_choice.name", prefix+name)
}
}
@@ -788,7 +798,7 @@ func applyClaudeToolPrefix(body []byte, prefix string) []byte {
return true
}
name := part.Get("name").String()
if name == "" || strings.HasPrefix(name, prefix) {
if name == "" || strings.HasPrefix(name, prefix) || builtinTools[name] {
return true
}
path := fmt.Sprintf("messages.%d.content.%d.name", msgIndex.Int(), contentIndex.Int())