AI Agent Development and Interview Guide: 06-Memory Systems, Multi-Agent and HITL Collaboration

1. technical system component

LangGraph technical system component Thread technical system component Thread technical system component Store，technical system component Memory overview。

🔥 P0 High-Frequency Must-Know: Memory technical system component RAG technical system component？
Memory technical system component；RAG knowledge basestechnical system component。technical system component、technical system component。technical system component“technical system component”technical system component，technical system componentknowledge bases。

2. technical system component

technical system component：

• technical system component；
• technical system component；
• technical system component；
• technical system component；
• technical system component；
• technical system component；
• technical system component。

technical system component Schema：

from datetime import datetime
from typing import Literal

from pydantic import BaseModel, Field


class MemoryRecord(BaseModel):
    memory_id: str
    user_id: str
    kind: Literal["preference", "profile", "task_fact"]
    key: str
    value: str
    source: Literal["user_explicit", "verified_tool", "inferred"]
    confidence: float = Field(ge=0, le=1)
    created_at: datetime
    expires_at: datetime | None = None
    sensitivity: Literal["normal", "personal", "restricted"] = "normal"

inferred technical system component，technical system component，technical system component。

3. technical system component

technical system component：

technical system component
 -> technical system component
 -> technical system component/technical system component
 -> technical system component
 -> technical system component
 -> technical system component
 -> technical system component

technical system component“technical system component”：

def resolve_memory(existing: MemoryRecord, incoming: MemoryRecord) -> str:
    if incoming.source == "user_explicit" and existing.source == "inferred":
        return "replace"
    if incoming.created_at <= existing.created_at:
        return "keep_existing"
    if incoming.value != existing.value:
        return "ask_user"
    return "refresh_ttl"

4. technical system component

technical system component。technical system component，technical system component：

async def load_relevant_memories(user, query, memory_store):
    candidates = await memory_store.search(
        user_id=user.id,
        query=query,
        limit=10,
        allowed_sensitivity=user.allowed_memory_levels,
    )
    return [m for m in candidates if not m.is_expired()][:5]

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5. technical system component

technical system component Agent technical system component：“technical system component X”。technical system component，technical system component。

technical system component：

• technical system component，technical system component；
• technical system component；
• technical system component；
• technical system component、technical system component Run；
• technical system component、technical system component；
• technical system component；
• technical system component；
• technical system component。

OWASP 2026 Agentic Top 10 technical system component Memory & Context Poisoning technical system component，technical system component OWASP Agentic Applications 2026。

🔥 P0 High-Frequency Must-Know: technical system component？
technical system component、technical system component、technical system component TTL；technical system component；technical system component；technical system component；technical system component；technical system component、technical system component。

6. technical system component Agent technical system component Prompt

technical system component Agent technical system component：

• technical system component；
• technical system component；
• technical system component；
• technical system component；
• technical system component；
• technical system component。

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7. technical system component Agent

technical system component：

• technical system componentparallelism，technical system component；
• technical system component、technical system component；
• technical system component；
• technical system component；
• technical system component。

technical system component：

• technical system component；
• technical system component；
• technical system component Agent technical system component；
• technical system component；
• technical system component；
• technical system component。

🔥 P0 High-Frequency Must-Know: technical system component Agent technical system component Agent technical system component？
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8. technical system component

8.1 Supervisor-Worker

Supervisor technical system component Worker，technical system component。

Supervisor
  -> Research Worker
  -> Data Worker
  -> Compliance Worker
  -> Aggregator

technical system component：technical system component；technical system component：Supervisor technical system component。

8.2 Pipeline

technical system component Agent technical system component Agent。technical system component，technical system component。

Extractor -> Analyst -> Reviewer -> Publisher

8.3 Peer / Event-driven

Agent technical system component，technical system component，technical system component。

technical system component Supervisor-Worker，technical system component；technical system component“technical system component”technical system component。

9. technical system component Agent technical system component

technical system component Agent technical system component。technical system component：

from typing import Literal
from pydantic import BaseModel


class AgentMessage(BaseModel):
    message_id: str
    run_id: str
    sender: str
    recipient: str
    task_type: Literal["research", "validate", "summarize"]
    payload: dict
    evidence_ids: list[str]
    deadline_ms: int
    correlation_id: str

technical system component：technical system component、technical system component ID、technical system component、technical system component ID。technical system component Payload Schema，technical system component“technical system component”technical system component。

10. parallelism Worker technical system component

import asyncio


async def run_research_workers(query: str, workers: list) -> list[dict]:
    async def one(worker):
        try:
            async with asyncio.timeout(15):
                return await worker.run(query)
        except TimeoutError:
            return {"worker": worker.name, "status": "timeout", "evidence": []}
        except Exception as exc:
            return {"worker": worker.name, "status": "failed", "error": type(exc).__name__}

    tasks = [one(worker) for worker in workers]
    return await asyncio.gather(*tasks)

technical system component：concurrencytechnical system component、technical system component、technical system component、technical system component、technical system component。

11. technical system component

Aggregator technical system component：

• technical system component；
• technical system component；
• technical system component；
• technical system component；
• Worker technical system component；
• technical system component；
• technical system component。

technical system component：

class WorkerFinding(BaseModel):
    claim: str
    evidence_ids: list[str]
    source_tier: Literal["official", "secondary", "unverified"]
    confidence: float
    conflicts_with: list[str] = []

technical system component Finding technical system component，technical system component。

12. Human-in-the-Loop technical system component

1. Approve/Reject：technical system component；
2. Edit：technical system component；
3. Provide missing data：technical system component；
4. Escalate：technical system component。

technical system component：

technical system component = technical system component × technical system component × technical system component

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13. technical system component UX technical system component

technical system component：

Agent technical system component，technical system component？

technical system component：

technical system component：technical system component [email protected] technical system component
technical system component：technical system component T-123456 technical system component
technical system component：technical system component，technical system component
technical system component：...
technical system component：support.email.send
[technical system component] [technical system component] [technical system component]

technical system component、technical system component、technical system component、technical system component、technical system component。

14. technical system component Agent technical system component

technical system component，technical system component：

• Supervisor technical system component；
• Worker technical system component；
• parallelismtechnical system component；
• technical system component；
• technical system component；
• technical system component Worker technical system component；
• technical system component；
• technical system component；
• Agent technical system component。

technical system component A/B：technical system component Agent technical system component vs technical system component Agent。technical system component 1% technical system component，technical system component。

15. technical system component

technical system component A：technical system component

technical system component、technical system component、TTL、technical system component、technical system component、technical system component。technical system component“technical system component”technical system component。

technical system component B：technical system component Supervisor

technical system component Worker technical system component、technical system component；parallelismtechnical system component；Aggregator technical system component、technical system component。

technical system component C：technical system component

technical system component 10 technical system component。technical system component、technical system component、technical system component。

16. technical system component

🔥 P0：technical system component？

technical system component Thread/Checkpoint，technical system component；technical system component Store，technical system component/technical system component Namespace technical system component，technical system component、technical system component、technical system component TTL。technical system component。

🔥 P0：technical system component？

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🔥 P0：technical system component Agent technical system component？

technical system component、technical system component ID technical system component、technical system component、technical system component Schema technical system component、technical system component、technical system component，technical system component。

⭐ P1：Supervisor technical system component？

technical system component Schema；technical system component Worker；technical system component；technical system component Trace；technical system component Worker technical system component；technical system component Aggregator technical system component；technical system component Supervisor technical system component Eval。

⭐ P1：technical system component？

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17. technical system component

• technical system component Run State、technical system component、technical system componentknowledge bases；
• technical system component、TTL、technical system component；
• technical system component Agent；
• technical system component、technical system componentparallelism Worker；
• technical system component；
• technical system component Agent technical system component Agent technical system component。