Structural graph tools for live codebase navigation — trace call paths, detect change blast radius, find dead code, query architecture. Use before reading files. 120x fewer tokens than file exploration.
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Zero-file-read structural analysis. Always try these tools BEFORE reading files for structural questions.
| Question | Tool |
|---|---|
What calls foo()? | trace_path(function_name="foo", direction="inbound") |
What does foo() call? | trace_path(function_name="foo", direction="outbound") |
| Full call chain | trace_path(direction="both", depth=3) |
| Impact of my change | detect_changes(base_branch="main") |
| Architecture overview | get_architecture |
| Find by name/pattern | search_graph(name_pattern="Auth.*") |
| Find by label | search_graph(label="Class") |
| Dead code | search_graph(max_degree=0, label="Function") |
| Custom query | query_graph(query="MATCH (n:Function)-[:CALLS]->(m) RETURN n.name, m.name LIMIT 20") |
| Execution flows | list_flows → get_affected_flows |
| ADR management | manage_adr(mode="get") |
index_repository(repo_path=".") — first run only (~6s for 500 files)list_projects — verify indexedget_architecture — architecture mapdetect_changes(base_branch="main") → risk score + blast radiusget_affected_flows → which execution paths breaktrace_path on highest-risk functionsget_architecture → community map, entry pointssearch_graph(name_pattern="<keyword>") → find relevant nodestrace_path → traverse from found nodesget_code_snippet(qualified_name="<name>") → source with contextsearch_graph(relationship="HTTP_CALLS") filters by degree — use query_graph for actual edge inspectionquery_graph has a 200-row cap — use search_graph with degree filters for countstrace_path requires exact qualified names — use search_graph(name_pattern=...) firstdirection="outbound" misses cross-service callers — use direction="both"has_more and paginate with offsetGraph auto-updates via background git polling (5–60s adaptive). For immediate refresh:
index_repository(repo_path=".", mode="fast")
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Route a codebase question to the right tool — structural graph, semantic search, or risk analysis. Use when you need to find or understand code without knowing exact file names.
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Auto-configure CLAUDE.md and claude/ knowledge docs for a new project. Use when setting up Brain Bootstrap in a new repository. Discovers the codebase, fills in templates, and writes project-specific configuration.
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Use before any new feature, component, or behavioral change — when you need to explore requirements and design before writing code
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Activate safety guards for the session. Use /careful before critical operations — blocks rm -rf, DROP TABLE, git push --force, kubectl delete namespace, docker system prune via PreToolUse hook.
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Generate a user-facing changelog from git commits — categorize, filter noise, translate to user language. Runs in isolated fork context.
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Save session state before context gets full or before ending. Writes current task state, branch, and loaded docs to claude/tasks/todo.md so the next session can resume cleanly.
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