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deno-lint-ignore-file no-import-prefix\nimport { Hono } from \"https://esm.sh/hono@4.6.9\";\nimport {\n readFile,\n serveFile,\n} from \"https://esm.town/v/std/utils@85-main/index.ts\";\nimport type {\n AppBootstrap,\n ElicitationPlan,\n ElicitationResponse,\n RequestedSchema,\n SchemaProperty,\n} from \"./shared/types.ts\";\n\nconst app = new Hono();\n\napp.onError((err, _c) => {\n throw err;\n});\n\napp.get(\"/frontend/*\", (c) => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", (c) => serveFile(c.req.path, import.meta.url));\n\nconst elicitations: ElicitationPlan[] = [\n {\n id: \"project-snapshot\",\n title: \"Project Snapshot\",\n message: \"Quick intake to orient the model before planning.\",\n requestedSchema: {\n type: \"object\",\n properties: {\n projectName: {\n type: \"string\",\n title: \"Project name\",\n description: \"e.g. Atlas Sync\",\n },\n primaryGoal: {\n type: \"string\",\n title: \"Primary goal\",\n description: \"e.g. Reduce onboarding time to under 3 minutes\",\n },\n timeline: {\n type: \"string\",\n title: \"Delivery window\",\n enum: [\"This week\", \"This month\", \"Quarter\"],\n },\n },\n required: [\"projectName\", \"primaryGoal\"],\n },\n },\n {\n id: \"risk-check\",\n title: \"Risk Check\",\n message: \"Capture constraints and blockers before execution.\",\n requestedSchema: {\n type: \"object\",\n properties: {\n riskLevel: {\n type: \"string\",\n title: \"Overall risk\",\n enum: [\"Low\", \"Medium\", \"High\"],\n },\n dependencies: {\n type: \"string\",\n title: \"Dependencies\",\n description: \"e.g. Auth service update, analytics export\",\n },\n needsApproval: {\n type: \"boolean\",\n title: \"Executive approval required\",\n },\n },\n required: [\"riskLevel\"],\n },\n },\n {\n id: \"launch-prefs\",\n title: \"Launch Preferences\",\n message: \"Define rollout sequencing and success metrics.\",\n requestedSchema: {\n type: \"object\",\n properties: {\n rollout: {\n type: \"string\",\n title: \"Rollout style\",\n enum: [\"Shadow\", \"Canary\", \"Full\"],\n },\n targetWeek: {\n type: \"integer\",\n title: \"Target week\",\n minimum: 1,\n maximum: 52,\n },\n successSignal: {\n type: \"string\",\n title: \"Success signal\",\n enum: [\"Activation\", \"Retention\", \"Revenue\", \"Support load\"],\n },\n },\n required: [\"rollout\"],\n },\n },\n];\n\nconst bootstrap: AppBootstrap = {\n elicitations,\n viewSourceUrl: import.meta.url.replace(\"esm.town\", \"val.town\"),\n contextDocument: [\n {\n type: \"p\",\n children: [\n {\n text:\n \"Context: The team is shipping a Deno-first quick app for structured elicitation. Capture the project goal, risks, and rollout preferences.\",\n },\n ],\n },\n {\n type: \"p\",\n children: [\n {\n text:\n \"Notes: Prioritize minimal setup, readable plans, and lightweight UI patterns.\",\n },\n ],\n },\n ],\n};\n\nlet cachedHtmlTemplate: string | undefined;\nlet cachedHtmlTemplatePromise: Promise | undefined;\n\nconst getHtmlTemplate = (): Promise => {\n if (cachedHtmlTemplate) {\n return Promise.resolve(cachedHtmlTemplate);\n }\n if (cachedHtmlTemplatePromise) {\n return cachedHtmlTemplatePromise;\n }\n\n const templatePromise = readFile(\"/frontend/index.html\", import.meta.url)\n .then((template: string) => {\n cachedHtmlTemplate = template;\n return template;\n })\n .catch((err: unknown) => {\n cachedHtmlTemplatePromise = undefined;\n throw err;\n });\n\n cachedHtmlTemplatePromise = templatePromise;\n return templatePromise;\n};\n\nconst serializeBootstrap = (data: AppBootstrap) =>\n JSON.stringify(data).replace(/[<>&\\u2028\\u2029]/g, (character) => {\n switch (character) {\n case \"<\":\n return \"\\\\u003c\";\n case \">\":\n return \"\\\\u003e\";\n case \"&\":\n return \"\\\\u0026\";\n case \"\\u2028\":\n return \"\\\\u2028\";\n case \"\\u2029\":\n return \"\\\\u2029\";\n default:\n return character;\n }\n });\n\n// --------------- API ---------------\n\n// List all available elicitation plans\napp.get(\"/api/plans\", (c) =>\n c.json(elicitations.map((p) => ({\n id: p.id,\n title: p.title,\n message: p.message,\n requestedSchema: p.requestedSchema,\n }))),\n);\n\n// Get a single plan by id\napp.get(\"/api/plans/:id\", (c) => {\n const plan = elicitations.find((p) => p.id === c.req.param(\"id\"));\n if (!plan) {\n return c.json({ error: \"Plan not found\" }, 404);\n }\n return c.json({\n id: plan.id,\n title: plan.title,\n message: plan.message,\n requestedSchema: plan.requestedSchema,\n });\n});\n\n// Validate a value against a schema property\nconst validateProperty = (\n key: string,\n value: unknown,\n prop: SchemaProperty,\n): string | null => {\n if (prop.type === \"string\") {\n if (typeof value !== \"string\") return `${key}: expected string`;\n if (prop.enum && !prop.enum.includes(value))\n return `${key}: must be one of [${prop.enum.join(\", \")}]`;\n if (typeof prop.minLength === \"number\" && value.length < prop.minLength)\n return `${key}: minimum length ${prop.minLength}`;\n if (typeof prop.maxLength === \"number\" && value.length > prop.maxLength)\n return `${key}: maximum length ${prop.maxLength}`;\n } else if (prop.type === \"number\" || prop.type === \"integer\") {\n if (typeof value !== \"number\") return `${key}: expected number`;\n if (prop.type === \"integer\" && !Number.isInteger(value))\n return `${key}: expected integer`;\n if (typeof prop.minimum === \"number\" && value < prop.minimum)\n return `${key}: minimum ${prop.minimum}`;\n if (typeof prop.maximum === \"number\" && value > prop.maximum)\n return `${key}: maximum ${prop.maximum}`;\n } else if (prop.type === \"boolean\") {\n if (typeof value !== \"boolean\") return `${key}: expected boolean`;\n }\n return null;\n};\n\n// Validate content against a requestedSchema\nconst validateContent = (\n content: Record,\n schema: RequestedSchema,\n): string[] => {\n const errors: string[] = [];\n // Check required fields\n for (const key of schema.required ?? []) {\n if (!(key in content) || content[key] === undefined || content[key] === \"\") {\n errors.push(`${key}: required`);\n }\n }\n // Check each provided field\n for (const [key, value] of Object.entries(content)) {\n const prop = schema.properties[key];\n if (!prop) {\n errors.push(`${key}: unknown field`);\n continue;\n }\n const err = validateProperty(key, value, prop);\n if (err) errors.push(err);\n }\n return errors;\n};\n\n// Submit a response to a plan — validates against its schema\napp.post(\"/api/plans/:id/respond\", async (c) => {\n const plan = elicitations.find((p) => p.id === c.req.param(\"id\"));\n if (!plan) {\n return c.json({ error: \"Plan not found\" }, 404);\n }\n\n const body = await c.req.json();\n const action = body.action;\n\n if (!action || ![\"accept\", \"decline\", \"cancel\"].includes(action)) {\n return c.json({ error: 'action must be \"accept\", \"decline\", or \"cancel\"' }, 400);\n }\n\n if (action !== \"accept\") {\n return c.json({ action, valid: true });\n }\n\n const content = body.content ?? {};\n const errors = validateContent(content as Record, plan.requestedSchema);\n\n if (errors.length) {\n return c.json({ action, valid: false, errors }, 422);\n }\n\n return c.json({ action, valid: true, content });\n});\n\n// MCP-compatible JSON-RPC endpoint: elicitation/create\napp.post(\"/api/rpc\", async (c) => {\n const body = await c.req.json<{\n jsonrpc?: string;\n id?: number | string;\n method?: string;\n params?: { message?: string; requestedSchema?: RequestedSchema };\n }>();\n\n if (body.method !== \"elicitation/create\") {\n return c.json({\n jsonrpc: \"2.0\",\n id: body.id ?? null,\n error: { code: -32601, message: `Method not found: ${body.method}` },\n }, 400);\n }\n\n const params = body.params;\n if (!params?.requestedSchema) {\n return c.json({\n jsonrpc: \"2.0\",\n id: body.id ?? null,\n error: { code: -32602, message: \"params.requestedSchema is required\" },\n }, 400);\n }\n\n // Match against a known plan by schema structure, or echo back the schema for custom requests\n const matchedPlan = elicitations.find((p) => {\n const planKeys = Object.keys(p.requestedSchema.properties).sort().join(\",\");\n const reqKeys = Object.keys(params.requestedSchema!.properties).sort().join(\",\");\n return planKeys === reqKeys;\n });\n\n return c.json({\n jsonrpc: \"2.0\",\n id: body.id ?? null,\n result: {\n action: \"accept\",\n content: {},\n _meta: {\n matched_plan: matchedPlan?.id ?? null,\n message: params.message ?? matchedPlan?.message ?? \"\",\n requestedSchema: params.requestedSchema,\n ui_url: c.req.url.replace(\"/api/rpc\", \"/\"),\n respond_url: matchedPlan\n ? c.req.url.replace(\"/api/rpc\", `/api/plans/${matchedPlan.id}/respond`)\n : null,\n },\n },\n });\n});\n\n// --------------- HTML ---------------\n\napp.get(\"/\", async (c) => {\n const htmlTemplate = await getHtmlTemplate();\n const dataScript = ``;\n const html = htmlTemplate.replace(\"\", `${dataScript}`);\n return c.html(html);\n});\n\nexport default app.fetch;\n","deleted","label",[102],"permalink","https://www.val.town/x/arthrod/elicitation/code/val.http.tsx","extension","actionData","errors"]