understand-chat（听懂聊天）

/understand-chat

Answer questions about this codebase using the knowledge graph at .understand-anything/knowledge-graph.json.

Graph Structure Reference

The knowledge graph JSON has this structure:

• project — {name, description, languages, frameworks, analyzedAt, gitCommitHash}
• nodes[] — each has {id, type, name, filePath, summary, tags[], complexity, languageNotes?}

- Node types: file, function, class, module, concept - IDs: file:path, function:path:name, class:path:name

• edges[] — each has {source, target, type, direction, weight}

- Key types: imports, contains, calls, depends_on

• layers[] — each has {id, name, description, nodeIds[]}
• tour[] — each has {order, title, description, nodeIds[]}

How to Read Efficiently

1. Use Grep to search within the JSON for relevant entries BEFORE reading the full file
2. Only read sections you need — don't dump the entire graph into context
3. Node names and summaries are the most useful fields for understanding
4. Edges tell you how components connect — follow imports and calls for dependency chains

Instructions

1. Check that .understand-anything/knowledge-graph.json exists in the current project root. If not, tell the user to run /understand first.
2. Read project metadata only — use Grep or Read with a line limit to extract just the "project" section from the top of the file for context (name, description, languages, frameworks).
3. Search for relevant nodes — use Grep to search the knowledge graph file for the user's query keywords: "$ARGUMENTS"

- Search "name" fields: grep -i "query_keyword" in the graph file - Search "summary" fields for semantic matches - Search "tags" arrays for topic matches - Note the id values of all matching nodes

1. Find connected edges — for each matched node ID, Grep for that ID in the edges section to find:

- What it imports or depends on (downstream) - What calls or imports it (upstream) - This gives you the 1-hop subgraph around the query

1. Read layer context — Grep for "layers" to understand which architectural layers the matched nodes belong to.
2. Answer the query using only the relevant subgraph:

- Reference specific files, functions, and relationships from the graph - Explain which layer(s) are relevant and why - Be concise but thorough — link concepts to actual code locations - If the query doesn't match any nodes, say so and suggest related terms from the graph