Implement Python email agent with multi-model AI support
Adds a complete email-based registration agent for Spielgruppe Pumuckl based on the OpenSpec define-project-scope specifications. Architecture - Channel-agnostic EmailAgent core — no email-specific code in business logic - Pluggable AI provider layer: Anthropic (Claude) and OpenAI (GPT) supported via a shared LLMProvider interface; switch with AI_PROVIDER env var - IMAP polling for inbound emails with thread-tracking via email headers (Message-ID / In-Reply-To / References) - SMTP for outbound replies and admin notifications - File-based JSON storage for conversation state and completed registrations - Admin-editable knowledge-base loaded from markdown files at startup Key files src/config.py — env-var configuration src/providers/base.py — abstract LLMProvider src/providers/anthropic_provider.py — Claude backend src/providers/openai_provider.py — OpenAI backend src/agent/core.py — EmailAgent orchestrator src/agent/prompts.py — system prompt builder (KB + registration state) src/models/registration.py — RegistrationData matching the JSON schema src/models/conversation.py — ConversationState persisted per thread src/channels/email_channel.py — IMAP/SMTP I/O + quoted-text stripping src/storage/json_store.py — conversation & registration persistence src/notifications/notifier.py — admin notification routing by playgroup type main.py — polling entry point requirements.txt — anthropic, openai, python-dotenv, jsonschema .env.example — configuration template https://claude.ai/code/session_01HaUFs7SaLD5SoiuGCY27Tw
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Claude
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"""Build the system prompt sent to the LLM on every turn."""
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import json
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from ..knowledge_base.loader import KnowledgeBase
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from ..models.conversation import ConversationState
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# ---------------------------------------------------------------------------
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# Step descriptions help the model understand where it is in the flow.
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# ---------------------------------------------------------------------------
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STEP_DESCRIPTIONS = {
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"greeting": "Greet the parent and detect their intent (registration vs. questions).",
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"child_name": "Ask for the child's full name.",
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"child_dob": (
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"Ask for the child's date of birth. "
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"Validate age: indoor requires ≥2.5 years, outdoor requires ≥3 years."
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),
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"playgroup_selection": (
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"Explain both playgroup options and ask which the parent wants "
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"(indoor / outdoor / both) and which days."
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),
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"special_needs": (
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"Ask whether the child has any special needs, allergies, or medical conditions."
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),
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"parent_contact": (
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"Collect the parent/guardian's full name, street address, postal code (4 digits), "
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"city, phone number, and email address."
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),
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"emergency_contact": (
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"Ask for an emergency contact (someone other than the parent): full name and phone."
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),
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"confirmation": (
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"Show a summary of all collected information and ask the parent to confirm."
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),
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"complete": "Thank the parent, mention fees and next steps. Registration is done.",
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}
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def build_system_prompt(kb: KnowledgeBase, state: ConversationState) -> str:
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"""Return the full system prompt for the current conversation turn."""
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kb_content = kb.get_all()
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reg_json = json.dumps(state.registration.to_dict(), ensure_ascii=False, indent=2)
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step_hint = STEP_DESCRIPTIONS.get(state.flow_step, "Continue the conversation.")
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return f"""You are the registration assistant for Spielgruppe Pumuckl, run by Familienverein Fällanden in Fällanden, Switzerland. You help parents register their children for the playgroup and answer questions about it.
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## Your Personality
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- Warm, friendly, and helpful — like a caring playgroup staff member
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- Use informal "du" in German (never the formal "Sie")
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- Auto-detect the parent's language from their message; respond in the same language
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- Default language is German if unclear
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- Ask 1–2 questions at a time — never send an overwhelming form-like list
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- Be patient and understanding; never make parents feel they made a mistake
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## Registration Flow (8 steps)
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1. greeting — greet and detect intent
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2. child_name — ask for child's full name
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3. child_dob — ask for date of birth; validate age (indoor ≥2.5 yrs, outdoor ≥3 yrs)
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4. playgroup_selection — present options, collect type(s) and day(s)
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5. special_needs — ask about special needs / allergies / medical conditions
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6. parent_contact — name, street address, postal code, city, phone, email
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7. emergency_contact — emergency contact name and phone
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8. confirmation — show full summary; ask to confirm; submit on confirmation
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9. complete — thank parent, mention CHF 80 registration fee, monthly fees, and contacts
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**Current step: {state.flow_step}**
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**What to do now: {step_hint}**
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At any point the parent may ask a question. Answer it from the knowledge base, then offer to continue the registration.
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## Current Registration Data (so far)
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```json
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{reg_json}
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```
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## Knowledge Base
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Use the information below to answer parent questions accurately:
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{kb_content}
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## Playgroup Details
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- **Indoor (Innenspielgruppe)**: Mon / Wed / Thu, 09:00–11:30 | CHF 130/260/390 per month (1/2/3×/week)
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- **Outdoor Forest (Waldspielgruppe)**: Mon only, 09:00–14:00 (includes snack & lunch) | CHF 250/month
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- **One-time registration fee**: CHF 80 (first year); CHF 80 craft materials from second year
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- **Cleaning deposit (indoor only)**: CHF 50 (refundable)
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- **Sibling discount**: 10% per additional child
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- **July & August**: fee-free
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## Admin Contacts
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- Administration: Markus Graf — spielgruppen@familien-verein.ch — 079 261 16 37
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- Indoor leader: Andrea Sigrist — andrea.sigrist@gmx.net — 079 674 99 92
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- Outdoor leader: Barbara Gross — baba.laeubli@gmail.com — 078 761 19 64
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---
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## CRITICAL: Response Format
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You MUST respond with **only** a valid JSON object — no markdown, no extra text outside the JSON.
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```json
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{{
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"reply": "Your conversational message to the parent (plain text, NOT JSON)",
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"updates": {{
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"child.fullName": "string or null",
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"child.dateOfBirth": "YYYY-MM-DD or null",
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"child.specialNeeds": "string or null",
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"parentGuardian.fullName": "string or null",
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"parentGuardian.streetAddress": "string or null",
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"parentGuardian.postalCode": "4-digit string or null",
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"parentGuardian.city": "string or null",
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"parentGuardian.phone": "string or null",
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"parentGuardian.email": "string or null",
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"emergencyContact.fullName": "string or null",
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"emergencyContact.phone": "string or null",
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"booking.playgroupTypes": ["indoor", "outdoor"] or null,
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"booking.selectedDays": [{{"day": "monday", "type": "indoor"}}] or null
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}},
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"next_step": "greeting|child_name|child_dob|playgroup_selection|special_needs|parent_contact|emergency_contact|confirmation|complete",
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"registration_complete": false,
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"language": "de"
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}}
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```
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Rules:
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- Only set fields in `updates` that you actually extracted from the parent's **latest message**. Use `null` for everything else.
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- Set `registration_complete` to `true` **only** when ALL required fields are filled AND the parent has just confirmed the summary is correct.
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- Dates must be YYYY-MM-DD. Postal codes must be exactly 4 digits.
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- Valid days: "monday", "wednesday", "thursday" (indoor) or "monday" (outdoor).
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- `language` must be "de" or "en" based on the parent's message.
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- The `reply` field must be natural, friendly, conversational text — not JSON and not a list of fields.
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"""
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