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Fix: Normalize Mistral tool call IDs to comply with API requirements #3080

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Fix: Normalize Mistral tool call IDs to comply with API requirements #3080

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19 changes: 13 additions & 6 deletions packages/opencode/src/provider/transform.ts
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Original file line number Diff line number Diff line change
@@ -1,17 +1,17 @@
import type { ModelMessage } from "ai"
import { unique } from "remeda"
import type { JSONSchema } from "zod/v4/core"
import { randomBytes } from "crypto"

export namespace ProviderTransform {
function normalizeToolCallIds(msgs: ModelMessage[]): ModelMessage[] {
function normalizeToolCallIds(msgs: ModelMessage[], transform: (id: string) => string): ModelMessage[] {
const idMap = new Map<string, string>()
return msgs.map((msg) => {
if ((msg.role === "assistant" || msg.role === "tool") && Array.isArray(msg.content)) {
msg.content = msg.content.map((part) => {
if ((part.type === "tool-call" || part.type === "tool-result") && "toolCallId" in part) {
return {
...part,
toolCallId: part.toolCallId.replace(/[^a-zA-Z0-9_-]/g, "_"),
}
if (!idMap.has(part.toolCallId)) idMap.set(part.toolCallId, transform(part.toolCallId))
return { ...part, toolCallId: idMap.get(part.toolCallId)! }
}
return part
})
Expand Down Expand Up @@ -64,7 +64,14 @@ export namespace ProviderTransform {

export function message(msgs: ModelMessage[], providerID: string, modelID: string) {
if (modelID.includes("claude")) {
msgs = normalizeToolCallIds(msgs)
msgs = normalizeToolCallIds(msgs, (id) => id.replace(/[^a-zA-Z0-9_-]/g, "_"))
}
if (providerID === "mistral" || modelID.includes("mistral")) {
const chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
msgs = normalizeToolCallIds(msgs, () => {
const bytes = randomBytes(9)
return Array.from(bytes, (b) => chars[b % chars.length]).join("")
})
}
if (providerID === "anthropic" || modelID.includes("anthropic") || modelID.includes("claude")) {
msgs = applyCaching(msgs, providerID)
Expand Down