preflight-dev/preflight

Overview

Preflight is a 24-tool MCP server for Claude Code that runs preflight checks on prompts, provides cross-service context, and enables session history search using LanceDB vectors. It also includes correction pattern learning and cost estimation features.

Best for

Best for
Developers using Claude Code who need structured prompt validation and session analytics

Use cases

• Validate prompts before execution to catch errors early
• Search across session histories with vector embeddings
• Estimate costs for Claude Code interactions

How to use

Install

npm install -g preflight-dev

Tools exposed

• tool_call
• sub_agent_spawn
• preflight_check
• scope_work
• clarify_intent
• enrich_agent_task
• sharpen_followup
• token_audit
• sequence_tasks
• check_session_health
• log_correction
• check_patterns
• session_handoff
• what_changed
• onboard_project
• search_history
• scan_sessions
• generate_scorecard
• estimate_cost
• session_stats

Tested with

Claude Code, ChatGPT

Notes

Preflight is a 24-tool MCP server for Claude Code that runs preflight checks on prompts, provides cross-service context, and enables session history search using LanceDB vectors. It also includes correction pattern learning and cost estimation features.

8 stars on GitHub. Last updated 2026-03-20. Licensed MIT.

Use cases

• Validate prompts before execution to catch errors early
• Search across session histories with vector embeddings
• Estimate costs for Claude Code interactions

Pros

• Offers a comprehensive set of 24 tools for prompt management
• Uses LanceDB for efficient vector-based session search
• Includes correction pattern learning to improve future interactions

Cons

• Requires Claude Code as a dependency, limiting standalone use
• May have a learning curve due to the number of tools available
• Vector search performance depends on session history size

Indexed from awesome-mcp-servers-punkpeye and enriched against its public facts.