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fix(opencode): normalize MCP text MIME types

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Aiden Cline 2026-06-11 20:31:40 -05:00
parent 805a004f89
commit f6a00292e6
4 changed files with 12 additions and 5 deletions
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2
packages/opencode/src/session/message-v2.ts
View file

@ -222,7 +222,7 @@ export const toModelMessagesEffect = Effect.fnUntraced(function* (
// Text, directories, and MCP references are resolved before provider conversion.
if (
part.type === "file" &&
part.mime !== "text/plain" &&
part.mime.split(";")[0]?.trim().toLowerCase() !== "text/plain" &&
part.mime !== "application/x-directory" &&
part.source?.type !== "resource"
) {

2
packages/opencode/src/session/prompt.ts
View file

@ -742,7 +742,7 @@ export const layer = Layer.effect(
} else if ("blob" in c && c.blob) {
const mime = ("mimeType" in c ? c.mimeType : undefined) ?? part.mime
const url = `data:${mime};base64,${c.blob}`
if (mime === "text/plain") {
if (mime.split(";")[0]?.trim().toLowerCase() === "text/plain") {
pieces.push({
messageID: info.id,
sessionID: input.sessionID,

7
packages/opencode/test/session/message-v2.test.ts
View file

@ -344,6 +344,13 @@ describe("session.message-v2.toModelMessage", () => {
text: { value: "@fixture-guide", start: 0, end: 14 },
},
},
{
...basePart(messageID, "p3"),
type: "file",
mime: "text/plain; charset=utf-8",
filename: "guide.txt",
url: "data:text/plain; charset=utf-8;base64,IyBSZXNvdXJjZSBjb250ZW50cw==",
},
] as SessionV1.Part[],
},
]

6
packages/opencode/test/session/prompt.test.ts
View file

@ -262,7 +262,7 @@ const resourceNoLLMServer = testEffect(
? [
{
uri,
mimeType: "text/plain",
mimeType: "text/plain; charset=utf-8",
blob: Buffer.from("MCP text blob fixture").toString("base64"),
},
]
@ -2117,8 +2117,8 @@ resourceNoLLMServer.instance(
(part) =>
part.type === "file" &&
!part.source &&
part.mime === "text/plain" &&
part.url.startsWith("data:text/plain;base64,"),
part.mime === "text/plain; charset=utf-8" &&
part.url.startsWith("data:text/plain; charset=utf-8;base64,"),
),
).toBe(true)
expect(