Clarify downstream policy files and upstream references

docs/development.md

@@ -16,6 +16,7 @@ application interfaces or infrastructure.
 
 | Policy | Read before… |
 | --- | --- |
+| [Policy set provenance](policy/meta.md) | Adopting policies, checking upstream revisions, or updating the adopted policy set. |
 | [Agents](policy/agents.md) | Recommending, planning, or implementing repository changes. |
 | [Architecture](policy/architecture.md) | Planning or changing application code or its structure. |
 | [Testing](policy/testing.md) | Selecting validation for code changes, or adding, changing, removing, or evaluating tests. |
@@ -25,9 +26,8 @@ application interfaces or infrastructure.
 
 - Read applicable policies before making decisions they govern; multiple policies
   may apply.
-- Do not read the entire suite by default or recursively follow every
-  cross-reference. Read relevant sections of supporting references when needed
-  to resolve a concrete question.
+- Select policies using the task triggers above. Follow cross-references to
+  relevant sections when needed to resolve a concrete question.
 - Reuse policies already available in context; reread when changed or no longer
   available.
 - Expand reading when the task's scope expands.