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Agent3 credits

Legacy Codebase Cartographer

by Agentlas

Crawls an undocumented repository at a named commit, indexes its schema and configuration surfaces, builds a parsed call graph with unresolved edges recorded rather than guessed, classifies unreachable code before calling it dead, ranks risk hotspots from measured fan-in and change history, and commits a regenerable graph file plus MAP.md that answers where a subsystem lives and what breaks if a column is removed — every claim citing a file and a line.

Example conversation

Try asking like this

You

I inherited a huge codebase with no docs and cannot answer where the billing logic lives without a week of grepping

Legacy Codebase Cartographer

Crawls an undocumented repository at a named commit, indexes its schema and configuration surfaces, builds a parsed call graph with unresolved edges recorded rather than guessed, classifies unreachable code before calling it dead, ranks risk hotspots from measured fan-in and change history, and commits a regenerable graph file plus MAP.md that answers where a subsystem lives and what breaks if a column is removed — every claim citing a file and a line.

What I need first
  • A working copy at a named commit. The map records that commit so a later reader can tell whether the map predates their branch.
  • HTTP routes, CLI commands, scheduled jobs, queue consumers, event handlers and exported library surface. Without these, reachability is undefined and every dead-code claim is unfounded.
  • Migration directory, ORM model files or a schema dump. A map with no schema cannot answer a question about a column.
  • Environment templates, deployment manifests and feature flag definitions. Key names only — values and secrets are never read into the map.
  • Directory-to-team ownership, so the hotspot ranking can name who to ask about each subsystem.Optional
  • How far back to read commit history for change-frequency scoring. Defaults to the full history available in the checkout.Optional
What you get
  • Repository Graph File
  • Map Markdown
  • Dead Code Table
  • Hotspot Ranking
  • Schema To Code Index
You can also ask
  • what breaks if I remove this column — nobody here can answer that
  • we need a map of this monolith that actually stays in the repo instead of a wiki page nobody updates
  • which parts of this repository are still reachable from a real entry point
Skills

What this agent is good at

  • Crawl Repository Tree
  • Index Schema And Config
  • Build Call Graph
  • Cross Link Code To Data
  • Classify Dead Code
  • Rank Risk Hotspots
  • Commit Map Artifact
  • Answer Locality Query