Week 10 — MCP + Pydantic AI sub-agents¶

At a glance

Phase 3: Agents + Protocols · Starts: Mon 30 Nov 2026 · Planned: 16h 45m

Build: Capstone: Python MCP server (runbooks, service status) + Pydantic AI sub-agents inside LangGraph nodes

By day¶

System Design · 45 min · Retries, exponential backoff with jitter, retry budgets — Marc Brooker on retries and timeouts → Reliability: retries, backoff, circuit breakers, bulkheads · resource w10-sd-1
DSA · 25 min · Implement Trie (Prefix Tree) → Tries · resource w10-dsa-1
Python · 20 min · Rep: repository + UoW for agent run records; keep LangGraph state separate from domain state → Architecture patterns in Python (repository, UoW, message bus) · resource w10-py-1
Communication · 30 min · Grammar: Inversion and emphasis structures → Week 10 drills · day 1 w10-comm-1

Agentic AI · 60 min · MCP spec 2026-07-28: tools/resources/prompts, Streamable HTTP, stateless core, Tasks, OAuth/OIDC hardening — HF MCP course unit 1-2 → Model Context Protocol (MCP) · resource w10-ai-1
DSA · 30 min · Design Add and Search Words Data Structure → Tries · resource w10-dsa-2
Communication · 30 min · Vocabulary: Strategy vocabulary: leverage, trajectory, headwinds → Week 10 drills · day 2 w10-comm-2

DSA · 25 min · Word Search II (trie + DFS pruning) → Tries · resource w10-dsa-3
Architecture · 45 min · CQRS & event sourcing: when it pays off, projections, snapshotting, pitfalls → CQRS & event sourcing w10-arch-1
Python · 20 min · Rep: TaskGroup error handling with except* when parallel sub-agents fail → asyncio in depth: TaskGroups, cancellation, backpressure w10-py-2
Communication · 30 min · Speaking drill: Storytelling with data → Week 10 drills · day 3 w10-comm-3

Agentic AI · 60 min · Pydantic AI: Agent, deps injection, typed outputs, tools, retries — build the 'root-cause analyst' sub-agent → Pydantic AI · resource w10-ai-2
Java/Spring AI · 30 min · Spring AI MCP server: @McpTool / @McpResource annotations, Streamable HTTP transport (SSE deprecated) → Tool calling & MCP servers in Spring AI · resource w10-java-1
Communication · 30 min · Idioms & phrasal verbs: Vision: north star, the big picture → Week 10 drills · day 4 w10-comm-4

System Design · 45 min · Batch vs stream pipelines: Lambda vs Kappa, windowing, late data — for ingesting incident streams into the RAG index → Batch & stream data pipelines w10-sd-2
DSA · 25 min · Kth Largest Element in a Stream + Last Stone Weight → Heap / priority queue · resource w10-dsa-4
Python · 20 min · Rep: FastAPI BackgroundTasks vs a real queue for long agent runs — implement 202 + status polling → FastAPI for production w10-py-3
Communication · 30 min · Writing: Writing engineering strategy → Week 10 drills · day 5 w10-comm-5

Agentic AI · 120 min · Capstone build: Python MCP server exposing search_runbooks + get_service_status over Streamable HTTP; LangGraph nodes call it via MCP client; Pydantic AI sub-agent in the analyse node → Model Context Protocol (MCP) · resource w10-ai-3
DSA · 30 min · K Closest Points to Origin → Heap / priority queue · resource w10-dsa-5
Java/Spring AI · 30 min · Start the Spring AI MCP server 'ticketing' (create_ticket, get_ticket) with MCP Java SDK 2.0 → Tool calling & MCP servers in Spring AI w10-java-2
Communication · 30 min · Record & shadow: Storytelling with data → Week 10 drills · day 6 w10-comm-6

System Design · 45 min · Written design: chat/messaging system — delivery guarantees, ordering, presence, fan-out, storage (cf. Discord's message store) → Chat / messaging system w10-sd-3
Architecture · 30 min · Write ADR 010 for capstone: incident timeline as append-only event log with read projection (vs CRUD) → CQRS & event sourcing · resource w10-arch-2
Staff+ · 30 min · Artifact: influence plan — adoption path for an agentic ops tool at work: allies, skeptics, pre-wiring, pilot, success metric → Influence without authority & alignment · resource w10-staff-1
Communication · 30 min · Soft skills + weekly review: Negotiating trade-offs → Week 10 drills · day 7 w10-comm-7
Review · 60 min · Explain-it-back: MCP transports + auth model; flashcards on retries/backoff and tries → Model Context Protocol (MCP) w10-rev-1