docs: add agent bootstrap and contract read router

rules/patterns/module-versioning/README.md

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+# Module Versioning Pattern Notes
+
+This file keeps examples and the decision tree. The normative rules live in `contract.md`.
+
+## Version Format
+
+```text
+N.M
+```
+
+Examples:
+
+- `1.0`
+- `2.0`
+- `2.1`
+- `2.3`
+
+## Canonical Storage Options
+
+Go constant:
+
+```go
+const Version = "2.1"
+```
+
+Document header:
+
+```text
+Version: 2.1
+```
+
+Config field:
+
+```json
+{ "version": "2.1" }
+```
+
+## Tag Format
+
+```text
+<module-name>/v<N.M>
+```
+
+Examples:
+
+- `parser/v2.0`
+- `api-client/v1.3`
+
+## Decision Tree
+
+```text
+Module changed?
+  -> no: version unchanged
+  -> yes: behavior or interface changed?
+     -> yes: N+1, reset minor to 0
+     -> no: narrow bugfix only -> N+0.1
+```
+
+## Commit Reminder
+
+If a commit changes a module, the same commit should update the module version.