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Fix tool call ID normalization for cross-provider switches to Anthropic/GitHub Copilot

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This commit is contained in:
Mario Zechner 2026-01-13 04:06:40 +01:00
parent 3690137ecc
commit 3c60ffa677
6 changed files with 131 additions and 7 deletions
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20
packages/ai/src/providers/transform-messages.ts
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@ -1,11 +1,11 @@
import type { Api, AssistantMessage, Message, Model, ToolCall, ToolResultMessage } from "../types.js";
/**
* Normalize tool call ID for GitHub Copilot cross-API compatibility.
* Normalize tool call ID for cross-provider compatibility.
* OpenAI Responses API generates IDs that are 450+ chars with special characters like `|`.
* Other APIs (Claude, etc.) require max 40 chars and only alphanumeric + underscore + hyphen.
* Anthropic APIs require IDs matching ^[a-zA-Z0-9_-]+$ (max 64 chars).
*/
function normalizeCopilotToolCallId(id: string): string {
function normalizeToolCallId(id: string): string {
return id.replace(/[^a-zA-Z0-9_-]/g, "").slice(0, 40);
}
@ -38,11 +38,17 @@ export function transformMessages<TApi extends Api>(messages: Message[], model:
return msg;
}
// Check if we need to normalize tool call IDs (github-copilot cross-API)
const needsToolCallIdNormalization =
// Check if we need to normalize tool call IDs
// Anthropic APIs require IDs matching ^[a-zA-Z0-9_-]+$ (max 64 chars)
// OpenAI Responses API generates IDs with `|` and 450+ chars
// GitHub Copilot routes to Anthropic for Claude models
const targetRequiresStrictIds = model.api === "anthropic-messages" || model.provider === "github-copilot";
const crossProviderSwitch = assistantMsg.provider !== model.provider;
const copilotCrossApiSwitch =
assistantMsg.provider === "github-copilot" &&
model.provider === "github-copilot" &&
assistantMsg.api !== model.api;
const needsToolCallIdNormalization = targetRequiresStrictIds && (crossProviderSwitch || copilotCrossApiSwitch);
// Transform message from different provider/model
const transformedContent = assistantMsg.content.flatMap((block) => {
@ -54,10 +60,10 @@ export function transformMessages<TApi extends Api>(messages: Message[], model:
text: block.thinking,
};
}
// Normalize tool call IDs for github-copilot cross-API switches
// Normalize tool call IDs when target API requires strict format
if (block.type === "toolCall" && needsToolCallIdNormalization) {
const toolCall = block as ToolCall;
const normalizedId = normalizeCopilotToolCallId(toolCall.id);
const normalizedId = normalizeToolCallId(toolCall.id);
if (normalizedId !== toolCall.id) {
toolCallIdMap.set(toolCall.id, normalizedId);
return { ...toolCall, id: normalizedId };