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feat: add per-call model override to MCP tools #73

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15 changes: 12 additions & 3 deletions mcp-server/src/imageGenerator.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,15 @@ export class ImageGenerator {
console.error(`DEBUG - Using image model: ${this.modelName}`);
}

private resolveModel(request: ImageGenerationRequest): string {
if (request.model && request.model !== this.modelName) {
console.error(
`DEBUG - Overriding model for this call: ${request.model} (server default: ${this.modelName})`,
);
}
return request.model || this.modelName;
}

private async openImagePreview(filePath: string): Promise<void> {
try {
const platform = process.platform;
Expand Down Expand Up @@ -265,7 +274,7 @@ export class ImageGenerator {
try {
// Make API call for each variation
const response = await this.ai.models.generateContent({
model: this.modelName,
model: this.resolveModel(request),
contents: [
{
role: 'user',
Expand Down Expand Up @@ -451,7 +460,7 @@ export class ImageGenerator {

try {
const response = await this.ai.models.generateContent({
model: this.modelName,
model: this.resolveModel(request),
contents: [
{
role: 'user',
Expand Down Expand Up @@ -574,7 +583,7 @@ export class ImageGenerator {
);

const response = await this.ai.models.generateContent({
model: this.modelName,
model: this.resolveModel(request),
contents: [
{
role: 'user',
Expand Down
42 changes: 42 additions & 0 deletions mcp-server/src/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -103,6 +103,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt'],
},
Expand All @@ -127,6 +132,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt', 'file'],
},
Expand All @@ -152,6 +162,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt', 'file'],
},
Expand Down Expand Up @@ -210,6 +225,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt'],
},
Expand Down Expand Up @@ -267,6 +287,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt'],
},
Expand Down Expand Up @@ -326,6 +351,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt'],
},
Expand Down Expand Up @@ -392,6 +422,11 @@ class NanoBananaServer {
'Automatically open generated images in default viewer',
default: false,
},
model: {
type: 'string',
description:
"Overrides the server's default model for this single call (optional)",
},
},
required: ['prompt'],
},
Expand Down Expand Up @@ -424,6 +459,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response =
await this.imageGenerator.generateTextToImage(imageRequest);
Expand All @@ -439,6 +475,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response = await this.imageGenerator.editImage(editRequest);
break;
Expand All @@ -453,6 +490,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response = await this.imageGenerator.editImage(restoreRequest);
break;
Expand All @@ -468,6 +506,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response =
await this.imageGenerator.generateTextToImage(iconRequest);
Expand All @@ -483,6 +522,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response =
await this.imageGenerator.generateTextToImage(patternRequest);
Expand All @@ -499,6 +539,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response = await this.imageGenerator.generateStorySequence(
storyRequest,
Expand All @@ -516,6 +557,7 @@ class NanoBananaServer {
noPreview:
(args?.noPreview as boolean) ||
(args?.['no-preview'] as boolean),
model: args?.model as string,
};
response =
await this.imageGenerator.generateTextToImage(diagramRequest);
Expand Down
2 changes: 2 additions & 0 deletions mcp-server/src/types.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,8 @@ export interface ImageGenerationRequest {
inputImage?: string;
outputCount?: number;
mode: 'generate' | 'edit' | 'restore';
// Overrides the server default model for a single call (NANOBANANA_MODEL / DEFAULT_MODEL)
model?: string;
// Batch generation options
styles?: string[];
variations?: string[];
Expand Down