devt: Claude Code's Multi-Agent Development Workflow Plugin

devt (short for development team) is a lightweight multi-agent development workflow plugin designed for Claude Code. It decomposes traditional single AI programming sessions into a coordinated team of 10 professional agents (e.g., programmer, tester, code reviewer, architect). Key features include automatic complexity detection, closed-loop learning, memory layer management, and architecture health scanning. Unlike single large prompts, devt uses a "command → workflow → agent" architecture, with project rules stored in .devt/rules/ for language-agnostic generality.

devt targets three main issues in AI-assisted programming:

1. Session Amnesia: Single sessions forget architectural decisions after context window rollover—devt uses a permanent memory layer (/.devt/memory/) storing ADRs, concepts, flows, rejected proposals, and lessons.
2. Surface Understanding: Single prompts often over-engineer simple fixes or ignore refactoring—devt auto-detects complexity levels (TRIVIAL/SIMPLE/STANDARD/COMPLEX) and applies corresponding pipelines.
3. No Experience Accumulation: Session-end experience loss—devt implements a closed-loop learning cycle (extract lessons → curate → index → query → inject into context).

10 Professional Agents: Each agent (e.g., programmer, architect, retro) has dedicated roles and default skills (e.g., architect uses architecture-health-scanner). Memory Layer: Two tiers—temporary (/.devt/state/ for workflow-specific data) and permanent (/.devt/memory/ for规范 knowledge). Preflight Protocol: Two layers of protection:

• Theme Brief: Auto-triggered to gather relevant project info (paths, symbols, rejected proposals, lessons).
• File Guard: Checks edits against preflight rules before writing. Key Commands: /devt:do (auto-route tasks), /devt:workflow (build/improve features), /devt:debug (system debugging), /devt:council (decision pressure testing).

Graphify Benefits: For users with Graphify installed, devt gains:

• AST parsing for accurate symbol matching (vs text grep).
• Real impact analysis via import graph traversal.
• Detection of stale symbols post-refactoring.
• Token-efficient code search (10x savings). Installation:

1. Add via Claude Code plugin marketplace: /plugin marketplace add emrecdr/devt → /plugin install devt.
2. Initialize: /devt:init (generates .devt configs).
3. First workflow: /devt:workflow "add GET /health endpoint returning 200".

devt represents an evolution in AI-assisted development:

1. From single sessions to continuous learning (cross-session experience accumulation).
2. From general prompts to professional分工 (task-specific agents).
3. From passive response to active protection (preflight protocol prevents errors).
4. From personal tools to team collaboration (shared memory layer for project规范). It provides a落地, scalable framework for teams to adopt AI-assisted development while maintaining code quality and architectural consistency.