| name | cas-search |
| description | Search across CAS content (memories, tasks, rules, skills, code). Use when needing to find information, understand codebase, or locate specific patterns. Supports hybrid BM25+semantic search, code symbol search, grep, context, and entity operations. |
| managed_by | cas |
CAS Search
Use mcp__cas__search to find information across CAS content and code. Choose the right action for the job:
Which Action to Use
search — Conceptual queries across memories, tasks, rules, skills:
mcp__cas__search action=search query="authentication flow" doc_type=entry
Filter with doc_type (entry, task, rule, skill, code_symbol, code_file) for better relevance.
code_search — Find code symbols by what they do, not exact names:
mcp__cas__search action=code_search query="user authentication" kind=function language=rust
Use include_source=true to get source code inline.
grep — Exact regex pattern matching in files:
mcp__cas__search action=grep pattern="TODO:" glob="*.rs"
Prefer the built-in Grep tool for simple patterns where you already know file paths.
Decision Guide
| Need | Action |
|---|
| "How does X work?" | search or code_search |
| Find exact string or regex | grep |
| Find past learnings | search with doc_type=entry |
| Find function by concept | code_search |
| Find related tasks | search with doc_type=task |
Other Actions
context — Session context summary: recent activity, active tasks, relevant memoriescontext_for_subagent — Task-focused context for spawning subagents (pass task_id and max_tokens)observe — Record discoveries/decisions during work (observation_type: general, decision, bugfix, feature, refactor, discovery)entity_list / entity_show — Browse extracted entities (person, project, technology, etc.)code_show — Full details for a specific code symbol by IDblame — Git blame with optional AI-line filtering (file_path, line_start, line_end)
