bkit Core Rules (Detailed Reference)

Comprehensive rules for bkit's document-driven AI-native development methodology.

1. PDCA Auto-Apply Rules

Task Classification

Classify tasks to determine the appropriate PDCA level:

Classification	Content Size	PDCA Level	Action
Quick Fix	< 10 lines	None	Execute immediately
Minor Change	< 50 lines	Recommended	Show summary, proceed
Feature	< 200 lines	Required	Check/create design doc
Major Feature	>= 200 lines	Required + Split	Require design, split into subtasks

Classification Keywords

Classification	Keywords
Quick Fix	fix, typo, correct, adjust, tweak
Minor Change	improve, refactor, enhance, optimize, update
Feature	add, create, implement, build, new feature
Major Feature	redesign, migrate, architecture, overhaul, rewrite

Design Document Check Flow

Before writing code, follow this decision tree:

1. Extract feature name from file path or user request
2. Check: docs/01-plan/features/{feature}.plan.md
3. Check: docs/02-design/features/{feature}.design.md
4. Decision:
   • If neither exists: suggest creating a plan first
   • If plan exists but no design: suggest creating a design
   • If both exist: reference design during implementation
   • If task is Quick Fix (<10 lines): skip PDCA, proceed directly

Pre-Write Rules

Before writing or editing any source code file:

1. Call bkit_pre_write_check(filePath) MCP tool
2. If response says design document exists: reference it during implementation
3. If response says no design document: suggest "Shall I create a design first?"
4. For major changes (>200 lines): ALWAYS suggest creating design first

Post-Write Guidance Rules

After significant code changes:

1. Call bkit_post_write(filePath, linesChanged) MCP tool
2. Follow the returned guidance
3. For features with design docs: suggest gap analysis
4. Format suggestion: "Consider running gap analysis: $pdca analyze {feature}"

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2. Level Detection Rules

Detect project level based on directory structure and config files.

Enterprise (2+ conditions met)

• kubernetes/, terraform/, k8s/, or infra/ directories exist
• services/ folder with 2+ services
• turbo.json or pnpm-workspace.yaml
• docker-compose.yml
• .github/workflows/ (CI/CD)

Dynamic (1+ conditions met)

• lib/bkend/ or src/lib/bkend/ directory
• .mcp.json with bkend configuration
• supabase/ folder
• firebase.json
• api/ or backend/ directory
• docker-compose.yml (without K8s indicators)
• package.json containing: bkend, @supabase, firebase

Starter

None of the above conditions met. Default level for simple projects.

Level-Specific Behavior

Aspect	Starter	Dynamic	Enterprise
Explanation	Friendly, avoid jargon	Technical but clear	Concise, use terms
Code comments	Detailed	Core logic only	Architecture only
Error handling	Step-by-step guide	Technical solutions	Brief cause + fix
PDCA docs	Simple	Feature-specific	Detailed architecture
Reference Skill	$starter	$dynamic	$enterprise

Level Upgrade Signals

• Starter to Dynamic: "Add login", "Save data", "Admin page"
• Dynamic to Enterprise: "High traffic", "Microservices", "Own server"

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3. 8-Language Trigger Keywords

bkit supports trigger detection in 8 languages:

Language	Plan	Design	Analyze	Report
EN	plan, planning	design, architecture	analyze, verify, check	report, summary
KO	계획, 기획	설계, 아키텍처	분석, 검증	보고서, 요약
JA	計画	設計	分析, 検証	報告
ZH	计划	设计	分析, 验证	报告
ES	planificar	diseño	analizar	informe
FR	planifier	conception	analyser	rapport
DE	planen	Entwurf	analysieren	Bericht
IT	pianificare	progettazione	analizzare	rapporto

Feature Keywords by Language

Language	Feature Request	Bug Fix	Refactor
EN	add, create, implement	fix, bug, error	refactor, clean
KO	추가, 생성, 구현	수정, 버그, 오류	리팩토링, 정리
JA	追加, 作成, 実装	修正, バグ, エラー	リファクタリング
ZH	添加, 创建, 实现	修复, 错误	重构
ES	agregar, crear	arreglar, error	refactorizar
FR	ajouter, créer	corriger, erreur	refactoriser
DE	hinzufügen, erstellen	beheben, Fehler	refaktorisieren
IT	aggiungere, creare	correggere, errore	rifattorizzare

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4. Naming Conventions

Code Naming Rules

Target	Rule	Example
Components	PascalCase	UserProfile, LoginForm
Functions	camelCase	getUserById(), handleSubmit()
Constants	UPPER_SNAKE_CASE	MAX_RETRY_COUNT, API_BASE_URL
Types/Interfaces	PascalCase	UserProfile, ApiResponse
Files (component)	PascalCase.tsx	UserProfile.tsx
Files (utility)	camelCase.ts	formatDate.ts
Folders	kebab-case	user-profile/, auth-provider/

Document Naming Rules

Format	Example	When to Use
{feature}.plan.md	user-auth.plan.md	Plan documents
{feature}.design.md	user-auth.design.md	Design documents
{feature}.analysis.md	user-auth.analysis.md	Analysis reports
{feature}.report.md	user-auth.report.md	Completion reports

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5. Code Quality Standards

Core Principles

• DRY: Extract to common function on 2nd use
• SRP: One function, one responsibility
• No Hardcoding: Use meaningful constants
• Extensibility: Write in generalized patterns

Pre-coding Checks

1. Does similar functionality exist? Search first
2. Check utils/, hooks/, components/ui/
3. Reuse if exists; create if not

Self-Check After Coding

• Same logic exists elsewhere?
• Can function be reused?
• Hardcoded values present?
• Function does only one thing?

When to Refactor

• Same code appears 2nd time
• Function exceeds 20 lines
• if-else nests 3+ levels
• Same parameters passed to multiple functions

Safety Rules

• NEVER commit .env, credentials, or secret files
• ALWAYS validate user input at system boundaries
• Prefer explicit error handling over silent failures
• Follow OWASP Top 10 guidelines for security:
  • Input validation (XSS, SQL Injection prevention)
  • Authentication/authorization handling
  • Sensitive data encryption
  • HTTPS enforcement
  • Rate limiting

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6. MCP Tools Quick Reference

Tool	When to Call	Priority
bkit_init	Session start	P0
bkit_analyze_prompt	First user message	P1
bkit_get_status	Before any PDCA operation	P0
bkit_pre_write_check	Before writing/editing source code	P0
bkit_post_write	After significant code changes	P1
bkit_complete_phase	When a PDCA phase is done	P0
bkit_detect_level	When project level is unclear	P1
bkit_classify_task	When estimating task size	P1
bkit_pdca_plan	Creating plan document	P0
bkit_pdca_design	Creating design document	P0
bkit_pdca_analyze	Running gap analysis	P1
bkit_pdca_next	Suggesting next phase	P1
bkit_select_template	Selecting PDCA template	P2
bkit_check_deliverables	Verifying phase deliverables	P2
bkit_memory_read	Reading session memory	P2
bkit_memory_write	Writing session memory	P2

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7. Response Style Guidelines

Include bkit Feature Usage Report

When PDCA is active, include at the end of responses:

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bkit Status: {feature} | Phase: {phase} | Match Rate: {rate}%
Next: {suggested next action}

Level-Appropriate Formatting

• Starter: Include learning points, explain concepts simply
• Dynamic: Include PDCA status badges, checklists, next-step guidance
• Enterprise: Include tradeoff analysis, cost impact, deployment considerations