Scan codebase exports and generate CODE_INDEX.md organized by capability. Check this index before writing new functions to prevent duplication (no more formatDate2 when formatDate exists).
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See how to installReview the instructions the agent will receive before you install.
Scan source files for all exported functions, classes, hooks, and components. Generate CODE_INDEX.md as a "check before write" safety net.
⚠️ Before writing any new function, check
CODE_INDEX.mdfor existing similar ones. Found a match? Use or extend it instead of creating a duplicate.
ls -d src/ lib/ app/ core/ 2>/dev/null || true
TypeScript / JavaScript:
grep -rn 'export function\|export const\|export class\|export default' \
. --include='*.ts' --include='*.tsx' --include='*.js' --include='*.jsx' \
--exclude-dir=node_modules --exclude-dir=dist --exclude-dir=build \
--exclude-dir='.next' --exclude-dir=coverage 2>/dev/null | head -200
Python:
grep -rn '^def \|^async def \|^class ' \
. --include='*.py' \
--exclude-dir=__pycache__ --exclude-dir=.venv --exclude-dir=venv \
2>/dev/null | head -200
| Category | Match on name or description |
|---|---|
| Date / Time | date, time, format, parse, duration, timestamp |
| Validation | validate, is*, check, verify, sanitize |
| API clients | fetch, get, post, put, delete, request, client |
| Auth | auth, login, logout, session, token, permission |
| Database | db, query, find, create, update, delete, repo |
| React Hooks | use* exports in .tsx files |
| Components | PascalCase exports in .tsx / .jsx |
| Utilities | helper, util, common (catch-all) |
# Code Index
*Auto-generated by /update-code-index — [TIMESTAMP]*
> Check this before writing new code. Find a match? Use or extend it instead.
## [Category]
- `functionName()` — src/path/to/file.ts:LINE — what it does in one line
Close with: "CODE_INDEX.md updated. I'll check it before writing any new code."
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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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