Plan Cortex — Codebase Intelligence

The holy grail of AI-assisted software development is connecting the high-level business requirements discussed in meetings directly to the underlying source code.

Plan AI achieves this through Plan Cortex — its built-in codebase intelligence engine.

What is Plan Cortex?

Plan Cortex is an advanced code intelligence system that indexes your entire repository into a semantic knowledge graph. It understands the relationships between functions, classes, API routes, and database models.

When running Plan AI locally or connecting it to your codebase, the Plan AI backend communicates with the Plan Cortex MCP Server to ground every output in real code — not hallucinated method names.

How Plan AI uses Plan Cortex

When you generate tickets or ask the chat interface to map out an implementation plan from a meeting transcript, Plan AI can query Plan Cortex to read your actual code.

1. Zero-Hallucination Tickets

If a TPM assigns a ticket to a developer based on a meeting, Plan AI will use Plan Cortex to scan the repository and find the exact files that need to be modified.

Instead of: "Update the user profile to include an avatar URL."

The ticket becomes: "Update the UserProfile component in src/components/UserProfile.tsx to include an avatar URL. You will also need to update the Prisma schema in backend/prisma/schema.prisma and regenerate the types."

2. Impact Analysis

Before suggesting a technical change, Plan AI can run an Impact Analysis via Plan Cortex. If the meeting transcript suggests modifying the AuthService, Plan Cortex will tell Plan AI exactly how many other services depend on that AuthService, preventing the AI from suggesting a change that would cause a massive blast radius.

By combining audio transcription with deterministic code intelligence, Plan AI bridges the gap between the product team's meetings and the engineering team's IDE.