TermDefinition
CLAUDE.mdProject instruction file Claude reads at the start of every session
backbone.ymlProject map file — gives Claude directory structure upfront, eliminates exploration waste
SkillA reusable agent workflow defined in a SKILL.md file
MCP ServerA running server that exposes tools Claude can call to interact with external systems
PluginAn installable package bundling skills, MCP servers, and hooks into a single versioned unit
Context rotThe degradation in model accuracy as the context window fills
CompactionSummarising conversation history to free up context space
Exploration taxTokens wasted when Claude searches directories instead of reading a map
Vibe codingHigh-autonomy AI-assisted development where Claude makes architectural decisions
Session handoffA markdown file capturing session state so the next session can pick up where you left off
Zone A/B/COur classification of code types by the level of Claude autonomy that's appropriate

Maintained by the neuroflash Engineering team. Changes via PR to ai-engineering-framework/source/claude-code-framework.md. Last reviewed: March 2026.