understand-explain

2. **Check graph freshness before using graph-derived context**:

• Read project.gitCommitHash from the graph metadata as GRAPH_COMMIT_RAW. Resolve it as a commit before using it in any Git diff, then compare it with git rev-parse HEAD and inspect project-scoped committed and working-tree changes from the project root:

     GRAPH_COMMIT=$(git rev-parse --verify --end-of-options "${GRAPH_COMMIT_RAW}^{commit}" 2>/dev/null)
     git rev-parse HEAD
     git diff --name-only "$GRAPH_COMMIT" HEAD -- .
     git diff --cached --name-only -- .
     git diff --name-only -- .
     git ls-files --others --exclude-standard -- .

• The -- . pathspec is required: commits that only touch a sibling monorepo project must not make this graph stale. A hash mismatch alone is not stale when the project diff is empty.
• Ignore the selected data directory (.ua/ or legacy .understand-anything/) in every command's output because it contains generated graph artifacts, not project source drift.
• If the committed diff or any working-tree command reports project files, warn before explaining that graph-derived context may omit those changes. Suggest: Run /understand to refresh the graph.
• Run the commit diff only when GRAPH_COMMIT_RAW resolves successfully. If the graph commit or Git metadata is missing, invalid, or unavailable, give a brief best-effort warning and continue instead of blocking.

3. **Find the target node** — use Grep to search the knowledge graph for the component: "$ARGUMENTS"

• For file paths (e.g., src/auth/login.ts): search for "filePath" matches
• For function notation (e.g., src/auth/login.ts:verifyToken): search for the function name in "name" fields filtered by the file path
• Note the exact node id, type, summary, tags, and complexity

4. **Find all connected edges** — Grep for the target node's ID in the edges section:

• "source" matches → things this node calls/imports/depends on (outgoing)
• "target" matches → things that call/import/depend on this node (incoming)
• Note the connected node IDs and edge types

5. **Read connected nodes** — for each connected node ID from step 4, Grep for those IDs in the nodes section to get their name, summary, and type. This builds the component's neighborhood.

6. **Identify the layer** — Grep for the target node's ID in the "layers" section to find which architectural layer it belongs to and that layer's description.

7. **Read the actual source file** — Read the source file at the node's filePath for the deep-dive analysis.

8. **Explain the component in context**:

• Its role in the architecture (which layer, why it exists)
• Internal structure (functions, classes it contains — from contains edges)
• External connections (what it imports, what calls it, what it depends on — from edges)
• Data flow (inputs → processing → outputs — from source code)
• Explain clearly, assuming the reader may not know the programming language
• Highlight any patterns, idioms, or complexity worth understanding