TDD-0001: Template

Metadata	Value
Status	`Draft` \| `In Review` \| `Approved` \| `In Progress` \| `Complete`
Created	YYYY-MM-DD
Author(s)	@username
RFC	RFC-NNNN (if applicable)
Epic/Ticket	PROJ-123

Context

Link to the RFC (if any) and provide a brief summary of what we’re building and why.

Background

Technical context needed to understand this design.

Problem Summary

One paragraph recap of the problem from the RFC.

Requirements

Functional Requirements

ID	Requirement	Priority
FR-1	…	Must
FR-2	…	Should
FR-3	…	Could

Non-Functional Requirements

Category	Requirement	Target
Performance	Response time	< 200ms p99
Reliability	Uptime	99.9%
Scalability	Concurrent users	1000+
Maintainability	Test coverage	> 80%

Proposed Architecture

System Overview

High-level diagram showing components and their interactions.

flowchart TB
  A[Component A] --> B[Component B]
  B --> C[Component C]

Components Involved

Component	Responsibility	Changes Required
Component A	…	New / Modified / None
Component B	…	New / Modified / None

Key Dependencies

Dependency	Version	Purpose
Library X	^2.0.0	…
Service Y	v1 API	…

Failure Modes

Failure	Impact	Mitigation
Service Y unavailable	…	Circuit breaker, fallback
Database timeout	…	Retry with backoff

Interfaces

API Endpoints

GET  /api/resource
POST /api/resource
PUT  /api/resource/:id

Data Contracts

Request/response schemas, event payloads.

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2
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{
  "field": "type",
  "nested": {
    "property": "value"
  }
}

Events (if applicable)

Event	Trigger	Payload	Consumers
`resource.created`	POST success	`{ id, ... }`	Service Z

Implementation Plan

Phase 1: Foundation

Task	Owner	Estimate	Dependencies
Task 1	@dev	2d	None
Task 2	@dev	3d	Task 1

Phase 2: Core Features

Task	Owner	Estimate	Dependencies
Task 3	@dev	5d	Phase 1
Task 4	@dev	3d	Task 3

Phase 3: Polish & Launch

Task	Owner	Estimate	Dependencies
Task 5	@dev	2d	Phase 2

Testing Plan

Unit Tests

What components/functions will have unit tests? Target coverage?

Integration Tests

What integrations will be tested? Test environment setup?

End-to-End Tests

Critical user flows to cover. Test data requirements.

Performance Tests

Load testing approach, benchmarks, tools.

Operational Plan

Observability

Type	Implementation
Logs	Structured JSON, correlation IDs
Metrics	Request rate, latency, error rate
Traces	Distributed tracing with context propagation

Alerts

Alert	Condition	Severity	Runbook
High error rate	> 1% errors/5min	P1	Link
Latency spike	p99 > 500ms	P2	Link

Runbook Notes

Key operational procedures, common issues, debugging tips.

AI Integration (if applicable)

Skip this section if the feature doesn’t involve AI/LLM components.

Model Selection

Requirement	Model Option	Trade-offs
Speed	GPT-3.5, Claude Instant	Lower quality
Quality	GPT-4o, Claude 3.5 Sonnet	Higher cost/latency
Privacy	Local models (Ollama)	Infrastructure overhead

Prompt Specifications

Link to prompt templates or define inline.

Prompt	Purpose	Template
System	Agent persona	PROMPT-NNNN
Task	Main task	Inline below

AI Testing Strategy

Evaluation Dataset

Category	Count	Source
Golden set	100	Manual curation
Edge cases	50	Bug reports, adversarial
Regression	200	Production samples

Evaluation Metrics

Metric	Target	Measurement Method
Accuracy	> 90%	Human eval on golden set
Hallucination rate	< 5%	Factual verification
Latency (p95)	< 3s	Automated benchmark
Cost per request	< $0.01	Token tracking

AI-Specific Test Cases

Model timeout handling
Rate limit handling
Invalid/malformed responses
Content filter triggers
Prompt injection attempts

Guardrails Implementation

Guardrail	Implementation
Input validation	Schema validation, length limits
Output validation	JSON schema, content filtering
Rate limiting	Per-user, per-org limits
Cost controls	Budget caps, alerts

Reference: See Agent Design Doc for detailed agent specifications.

Risks & Mitigations

Risk	Likelihood	Impact	Mitigation
Risk 1	Medium	High	Mitigation strategy
Risk 2	Low	Medium	Mitigation strategy

Out of Scope

Explicitly list what this TDD does NOT cover.

Out of scope item 1
Out of scope item 2