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fix(opencode): decode MCP text blobs

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Aiden Cline 2026-06-11 16:45:41 -05:00
parent 0ecc41c83c
commit 805a004f89
2 changed files with 41 additions and 1 deletions
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12
packages/opencode/src/session/prompt.ts
View file

@ -741,13 +741,23 @@ 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") {
pieces.push({
messageID: info.id,
sessionID: input.sessionID,
type: "text",
synthetic: true,
text: decodeDataUrl(url),
})
}
pieces.push({
messageID: info.id,
sessionID: input.sessionID,
type: "file",
mime,
filename: part.filename,
url: `data:${mime};base64,${c.blob}`,
url,
})
}
}

30
packages/opencode/test/session/prompt.test.ts
View file

@ -258,6 +258,14 @@ const resourceNoLLMServer = testEffect(
text: "# MCP resource fixture",
},
]
: uri === "opencode-fixture://text-blob"
? [
{
uri,
mimeType: "text/plain",
blob: Buffer.from("MCP text blob fixture").toString("base64"),
},
]
: [
{
uri,
@ -2075,6 +2083,18 @@ resourceNoLLMServer.instance(
text: { value: "@fixture-guide", start: 0, end: 14 },
},
},
{
type: "file",
mime: "text/plain",
url: "opencode-fixture://text-blob",
filename: "fixture-text-blob",
source: {
type: "resource",
clientName: "resource-only-fixture",
uri: "opencode-fixture://text-blob",
text: { value: "@fixture-text-blob", start: 15, end: 33 },
},
},
{
type: "file",
mime: "image/png",
@ -2091,6 +2111,16 @@ resourceNoLLMServer.instance(
})
expect(message.parts.some((part) => part.type === "text" && part.text === "# MCP resource fixture")).toBe(true)
expect(message.parts.some((part) => part.type === "text" && part.text === "MCP text blob fixture")).toBe(true)
expect(
message.parts.some(
(part) =>
part.type === "file" &&
!part.source &&
part.mime === "text/plain" &&
part.url.startsWith("data:text/plain;base64,"),
),
).toBe(true)
expect(
message.parts.some(
(part) => part.type === "file" && part.source?.type === "resource" && part.url === "opencode-fixture://pixel",