Adopt standard policy guidance and document provenance

AGENTS.md

@@ -1,5 +1,30 @@
-Please review `docs/development.md` for initial orientation in this repository
-and follow its task-specific reading guide.
+Start with `docs/development.md` for orientation and use its policy reading guide
+to select the policies applicable to the task. Do not read the entire suite by
+default.
 
-Review and follow `docs/policy/agents.md` before recommending, planning, or
-implementing any changes to this repository.
+Read and follow `docs/policy/agents.md` before recommending, planning, or
+implementing repository changes.
+
+<!-- codebase-memory-mcp:start -->
+# Codebase Knowledge Graph (codebase-memory-mcp)
+
+This project uses codebase-memory-mcp to maintain a knowledge graph of the codebase.
+ALWAYS prefer MCP graph tools over grep/glob/file-search for code discovery.
+
+## Priority Order
+1. `search_graph` — find functions, classes, routes, variables by pattern
+2. `trace_path` — trace who calls a function or what it calls
+3. `get_code_snippet` — read specific function/class source code
+4. `query_graph` — run Cypher queries for complex patterns
+5. `get_architecture` — high-level project summary
+
+## When to fall back to grep/glob
+- Searching for string literals, error messages, config values
+- Searching non-code files (Dockerfiles, shell scripts, configs)
+- When MCP tools return insufficient results
+
+## Examples
+- Find a handler: `search_graph(name_pattern=".*OrderHandler.*")`
+- Who calls it: `trace_path(function_name="OrderHandler", direction="inbound")`
+- Read source: `get_code_snippet(qualified_name="pkg/orders.OrderHandler")`
+<!-- codebase-memory-mcp:end -->