mcp-decisive
Version:
MCP server for WRAP decision-making framework with structured output
152 lines • 7.91 kB
JavaScript
import { tripwireOutputSchema } from './schema.js';
import { TRIPWIRE_ANALYSIS_PROMPT } from './prompt.js';
import { toStructuredCallToolResult } from '../util.js';
export const createTripwireHandler = (server) => {
return async (args) => {
try {
// Format options for the prompt
const optionsText = args.options.map(option => `- **${option.name}** (ID: ${option.id}): ${option.description}`).join('\n');
// Create the prompt with options
const analysisPrompt = TRIPWIRE_ANALYSIS_PROMPT.replace('{{options}}', optionsText);
try {
// Use MCP sampling to request LLM analysis from the client
const response = await server.server.createMessage({
messages: [{
role: "user",
content: {
type: "text",
text: analysisPrompt
}
}],
modelPreferences: {
costPriority: 0.3,
speedPriority: 0.5,
intelligencePriority: 0.8
},
systemPrompt: "あなたは意思決定支援の専門家として、撤退基準の設定を支援します。具体的で実用的な基準を提案してください。期待される形式でJSONを返してください。",
maxTokens: 2000
});
// Extract the response content
let analysisResult = '';
if (response.content.type === 'text') {
analysisResult = response.content.text;
}
else {
throw new Error('Received non-text response from sampling');
}
// Try to parse JSON response
let tripwiresData;
try {
// Look for JSON in the response
const jsonMatch = analysisResult.match(/```json\s*([\s\S]*?)\s*```/) ||
analysisResult.match(/\{[\s\S]*\}/);
if (jsonMatch) {
const jsonStr = jsonMatch[1] || jsonMatch[0];
const parsedData = JSON.parse(jsonStr);
// Validate the parsed data with Zod schema
const validationResult = tripwireOutputSchema.safeParse(parsedData);
if (validationResult.success) {
tripwiresData = validationResult.data;
}
else {
throw new Error(`Parsed JSON validation failed: ${validationResult.error.message}`);
}
}
else {
throw new Error('No JSON found in response');
}
}
catch (parseError) {
// Fallback: create structured response from text analysis
tripwiresData = {
tripwires: args.options.map(option => ({
optionId: option.id,
optionName: option.name,
criteria: [
{
id: `${option.id}-criterion-1`,
description: `AIが分析した${option.name}の撤退基準`,
type: 'other',
threshold: 'AI分析結果に基づく基準',
severity: 'medium'
}
]
})),
metadata: {
generatedAt: new Date().toISOString(),
totalOptions: args.options.length,
totalCriteria: args.options.length,
note: 'AI応答からの自動生成'
}
};
}
const successMessage = `✅ AIが${args.options.length}個の選択肢について撤退基準を分析しました。\n\n**分析結果:**\n${analysisResult}`;
// Final validation before returning
const finalValidation = tripwireOutputSchema.safeParse(tripwiresData);
if (!finalValidation.success) {
throw new Error(`Final validation failed: ${finalValidation.error.message}`);
}
return toStructuredCallToolResult([successMessage], finalValidation.data, false);
}
catch (samplingError) {
// If sampling fails, return an error with fallback structure
const errorMessage = `❌ サンプリング要求が失敗しました: ${samplingError instanceof Error ? samplingError.message : String(samplingError)}`;
const fallbackResponse = {
tripwires: args.options.map(option => ({
optionId: option.id,
optionName: option.name,
criteria: [
{
id: `${option.id}-fallback-1`,
description: `${option.name}のパフォーマンス基準（フォールバック）`,
type: 'performance',
threshold: '目標値の70%を下回る状態が継続',
severity: 'high'
},
{
id: `${option.id}-fallback-2`,
description: `${option.name}のコスト基準（フォールバック）`,
type: 'cost',
threshold: '予算の120%を超過',
severity: 'critical'
}
]
})),
metadata: {
generatedAt: new Date().toISOString(),
totalOptions: args.options.length,
totalCriteria: args.options.length * 2,
note: 'フォールバック応答'
}
};
return toStructuredCallToolResult([errorMessage], fallbackResponse, true);
}
}
catch (error) {
// Always return valid structured content even for errors
const errorResponse = {
tripwires: args.options.map(option => ({
optionId: option.id,
optionName: option.name,
criteria: [
{
id: `${option.id}-error-1`,
description: `${option.name}のエラー対応基準`,
type: 'other',
threshold: 'システムエラーによる基準設定不可',
severity: 'low'
}
]
})),
metadata: {
generatedAt: new Date().toISOString(),
totalOptions: args.options.length,
totalCriteria: args.options.length,
note: 'システムエラーによる最小限の応答'
}
};
return toStructuredCallToolResult([`トリップワイヤー生成中にエラーが発生しました: ${error instanceof Error ? error.message : String(error)}`], errorResponse, true);
}
};
};
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