understand-onboard（船上了解）

/understand-onboard

Generate a comprehensive onboarding guide from the project's knowledge graph.

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. If not, tell the user to run /understand first.
2. Read project metadata — use Grep or Read with a line limit to extract the "project" section (name, description, languages, frameworks).
3. Read layers — Grep for "layers" to get the full layers array. These define the architecture and will structure the guide.
4. Read the tour — Grep for "tour" to get the guided walkthrough steps. These provide the recommended learning path.
5. Read file-level nodes only — use Grep to find nodes with "type": "file" in the knowledge graph. Skip function-level and class-level nodes to keep the guide high-level. Extract each file node's name, filePath, summary, and complexity.
6. Identify complexity hotspots — from the file-level nodes, find those with the highest complexity values. These are areas new developers should approach carefully.
7. Generate the onboarding guide with these sections:

- Project Overview: name, languages, frameworks, description (from project metadata) - Architecture Layers: each layer's name, description, and key files (from layers + file nodes) - Key Concepts: important patterns and design decisions (from node summaries and tags) - Guided Tour: step-by-step walkthrough (from the tour section) - File Map: what each key file does (from file-level nodes, organized by layer) - Complexity Hotspots: areas to approach carefully (from complexity values)

1. Format as clean markdown
2. Offer to save the guide to docs/ONBOARDING.md in the project
3. Suggest the user commit it to the repo for the team