# AI Solution Design

## 1. Decision and constraints

- Product task and baseline:
- Required quality / unacceptable failure:
- Volume, latency, availability, and cost:
- Data, privacy, region, and deployment:
- Maximum autonomy and human oversight:

## 2. Option comparison

| Option | Quality | Latency | Cost | Risk/control | Operations | Decision |
|---|---:|---:|---:|---:|---:|---|
| Rule/search/traditional ML |  |  |  |  |  |  |
| Prompt-only |  |  |  |  |  |  |
| RAG |  |  |  |  |  |  |
| Workflow/tools |  |  |  |  |  |  |
| Bounded Agent |  |  |  |  |  |  |
| Fine-tuning |  |  |  |  |  |  |

## 3. Proposed architecture

```text
User / event
→ identity, permission, input validation
→ task routing and context construction
→ rules / retrieval / model / workflow / tools
→ output and domain validation
→ confirmation / action / response / handoff
→ trace, metrics, feedback, audit
```

Describe each component, owner, interface, data, timeout, retry, and failure behavior.

## 4. Data and context

- Sources, owner, authority, freshness, ACL:
- Ingestion, chunking/index, sync, deletion:
- Context budget and ordering:
- Memory scope and retention:
- Untrusted-content isolation:

## 5. Models and routing

| Task | Candidate | Reason | Fallback | Version / change policy |
|---|---|---|---|---|

## 6. Tools and actions

| Tool | Read/write | Authorization | Input validation | Idempotency | Confirmation | Recovery |
|---|---|---|---|---|---|---|

## 7. Reliability and safety

- Rate, time, step, token, and cost budgets:
- Refusal / fallback / human handoff:
- Tenant isolation and secret handling:
- Audit and evidence:
- Failure modes and controls:

## 8. Observability and versions

- Trace fields and privacy treatment:
- Model/Prompt/index/tool/code/eval versions:
- Dashboards, alerts, sample review:

## 9. Evaluation and experiments

| Hypothesis / decision | Dataset | Metric | Threshold | Owner | Result / next decision |
|---|---|---|---|---|---|

## 10. Capacity and unit cost

- Traffic assumptions:
- P50/P95 tokens, steps, tool calls, latency:
- Total cost per successful task:
- Conservative/base/upside capacity:

## 11. Delivery and rollback

- Prototype and phase gates:
- Dependencies:
- Rollout stages:
- Rollback trigger/mechanism:
- Open decisions and due dates: