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Codebase Q&A (understand-chat)

Answers questions about your codebase by selectively grepping a pre-built knowledge graph instead of loading it all.

Dev & CodingIntermediate★ 83,859⑂ 7,068AI score 8/10Last updated: Sep 12, 2026

What it does

  • Reads .ua/knowledge-graph.json (or the legacy .understand-anything/knowledge-graph.json) from the project root as its source of truth.
  • Greps name, summary, and tags fields for your query keywords rather than dumping the whole JSON into context.
  • Follows edges from matched node IDs to rebuild the 1-hop subgraph: what it imports/calls downstream, and who calls it upstream.
  • Reads layers to explain which architectural layer the relevant code lives in.
  • Checks freshness by comparing the graph's project.gitCommitHash against git rev-parse HEAD plus staged and working-tree diffs (scoped with -- . so sibling monorepo changes don't count), warning you when the graph is stale.

Who it's for

  • Engineers onboarding onto a large, unfamiliar repository.
  • Teams repeatedly asking "who calls this function?" or "where does auth happen?".
  • Claude Code users who want token-efficient code exploration.

Examples

  1. /understand-chat where does the payment flow start? → locates matching nodes and flow/step chains and explains from the entry point.
  2. /understand-chat which modules use AuthService → traces upstream edges and lists callers with file paths.
  3. /understand-chat what's in the data layer → summarizes nodes grouped by the graph's layer definitions.

Prerequisite: run /understand first to generate the knowledge graph.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/Egonex-AI/Understand-Anything/HEAD/understand-anything-plugin/skills/understand-chat/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the understand-anything-plugin/skills/understand-chat folder from the GitHub repo Egonex-AI/Understand-Anything into my ~/.claude/skills/understand-chat/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/Egonex-AI/Understand-Anything.git && mkdir -p ~/.claude/skills && cp -r Understand-Anything/understand-anything-plugin/skills/* ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal and change into a working directory.
  2. Clone the repo: git clone https://github.com/Egonex-AI/Understand-Anything.git
  3. Create the skills folder: mkdir -p ~/.claude/skills
  4. Copy the skills in: cp -r Understand-Anything/understand-anything-plugin/skills/* ~/.claude/skills/
  5. Restart Claude Code and confirm understand-chat appears in your skill list.
  6. In the project you want to explore, run /understand once to build .ua/knowledge-graph.json.
  7. Then ask questions with /understand-chat <your question>.
View source on GitHub ↗License: MIT