Implementation Plan: [FEATURE]

Branch: [###-feature-name] | Date: [DATE] | Spec: [link] Input: Feature specification from /specs/[###-feature-name]/spec.md

Note: This template is filled in by the /speckit.plan command. See .specify/templates/commands/plan.md for the execution workflow.

Summary

[Extract from feature spec: primary requirement + technical approach from research]

Technical Context

Language/Version: [e.g., Python 3.11, Swift 5.9, Rust 1.75 or NEEDS CLARIFICATION]
Primary Dependencies: [e.g., FastAPI, UIKit, LLVM or NEEDS CLARIFICATION]
Storage: [if applicable, e.g., PostgreSQL, CoreData, files or N/A]
Testing: [e.g., pytest, XCTest, cargo test or NEEDS CLARIFICATION]
Target Platform: [e.g., Linux server, iOS 15+, WASM or NEEDS CLARIFICATION] Project Type: [single/web/mobile - determines source structure]
Performance Goals: [domain-specific, e.g., 1000 req/s, 10k lines/sec, 60 fps or NEEDS CLARIFICATION]
Constraints: [domain-specific, e.g., <200ms p95, <100MB memory, offline-capable or NEEDS CLARIFICATION]
Scale/Scope: [domain-specific, e.g., 10k users, 1M LOC, 50 screens or NEEDS CLARIFICATION]

Constitution Check

GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.

Principle I - Tool-First Architecture

Feature designed as standalone, reusable tool
Single responsibility clearly defined
Independently testable and documented
Supports both CLI and programmatic use

Principle II - Developer Experience (DX) Priority

API/interface is clear and intuitive
Documentation includes examples
Error messages guide users to solutions
Simple by default, powerful when needed

Principle III - Hook-Driven Extensibility

Uses well-defined hooks with clear contracts (if applicable)
Hook execution is predictable and debuggable
Hook failures are graceful and informative

Principle IV - Agent Specialization

Agent has clearly defined scope (if applicable)
Agent is context-aware with appropriate tools
Agent prompts are version-controlled and testable

Principle V - Test-First Development (NON-NEGOTIABLE)

Tests will be written before implementation
Unit tests cover core functionality
Integration tests validate tool composition/hook interactions
Agent behavior validated through prompt/output testing (if applicable)

Principle VI - Observability & Debuggability

Appropriate logging levels defined (debug, info, warn, error)
Events emitted for monitoring (if applicable)
Reasoning/decision-making processes exposed (for agents)
Performance metrics measurable

Principle VII - Simplicity & YAGNI

Simplest solution chosen
Complexity justified (see Complexity Tracking if violations exist)
Composition preferred over inheritance
No premature optimization or feature bloat

Project Structure

Documentation (this feature)

specs/[###-feature]/
├── plan.md              # This file (/speckit.plan command output)
├── research.md          # Phase 0 output (/speckit.plan command)
├── data-model.md        # Phase 1 output (/speckit.plan command)
├── quickstart.md        # Phase 1 output (/speckit.plan command)
├── contracts/           # Phase 1 output (/speckit.plan command)
└── tasks.md             # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)

Source Code (repository root)

# [REMOVE IF UNUSED] Option 1: Single project (DEFAULT)
src/
├── models/
├── services/
├── cli/
└── lib/

tests/
├── contract/
├── integration/
└── unit/

# [REMOVE IF UNUSED] Option 2: Web application (when "frontend" + "backend" detected)
backend/
├── src/
│   ├── models/
│   ├── services/
│   └── api/
└── tests/

frontend/
├── src/
│   ├── components/
│   ├── pages/
│   └── services/
└── tests/

# [REMOVE IF UNUSED] Option 3: Mobile + API (when "iOS/Android" detected)
api/
└── [same as backend above]

ios/ or android/
└── [platform-specific structure: feature modules, UI flows, platform tests]

Structure Decision: [Document the selected structure and reference the real directories captured above]

Complexity Tracking

Fill ONLY if Constitution Check has violations that must be justified

Violation	Why Needed	Simpler Alternative Rejected Because
[e.g., 4th project]	[current need]	[why 3 projects insufficient]
[e.g., Repository pattern]	[specific problem]	[why direct DB access insufficient]

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