Reconcile sequence identity documentation

docs/internal/imports.md

@@ -65,11 +65,18 @@ returns a closed cycle rotated to its smallest key; blocked dependents are not
 reported as cycle members.
 
 Import composition schedules a main tier or one underlay group as a single
-strict-scope graph. Item contributions own nested local strict-mapping scopes;
-their helpers complete before the item is placed in its outer scope. Inheritance
-uses the same ready-node rule inside each sibling mapping scope, while preserving
-the authored mapping order in its output. These scopes do not flatten into one
-global graph, and independent precedence tiers remain separate.
+strict-scope graph. Applicable collection declarations are gathered for the
+scope before peer composition, including identity inherited from lower tiers.
+Identified peer sequences then combine distinct records in assembled source and
+list order; after the strict scope completes, layered assembly applies the
+resolved collection operation against the lower value, as defined by the
+[configuration contract](../config.md#strict-document-composition). Item
+contributions own nested local strict-mapping scopes; their helpers complete
+before the item is placed in its outer scope. Inheritance uses the same
+ready-node rule inside each sibling mapping scope, while preserving the authored
+mapping order in its output.
+These scopes do not flatten into one global graph, and independent precedence
+tiers remain separate.
 
 The main owners are [`import_selection.go`](../../internal/engine/import_selection.go),
 [`directory_walk.go`](../../internal/engine/directory_walk.go),

docs/internal/overview.md

@@ -9,12 +9,13 @@ Implemented component owners:
 
 - `internal/engine` owns host and native-filesystem source acquisition,
   grouped strict composition, recursive precedence assembly, per-input mapping
-  and sequence-item placement, definition-registered distinct-ID sequence
-  composition within strict tiers, and immediate-parent-relative import
-  placement within that assembly. Higher-priority sequences replace lower
-  sequences as whole values. The engine also owns dependency-ready,
-  destination-local sibling inheritance before typed decoding, plus shared
-  source-version checking with sanitized declaration evidence.
+  and sequence-item placement, YAML collection declarations and operations for
+  identified sequences, and application identity registrations for strict
+  composition, inheritance, and final validation. It applies the selected
+  collection operation at precedence boundaries and owns dependency-ready,
+  destination-local inheritance before typed decoding. CLI assignment follows
+  inheritance and decoding, before application resolution. The engine also owns
+  shared source-version checking with sanitized declaration evidence.
   Explicit import discovery supports declared paths, directory searches, and
   globs; load-wide defaults and source-local empty-selection evidence cross the
   root facade without changing acquisition order. Import and inheritance
@@ -56,9 +57,10 @@ semantics, including [input destinations](../config.md#input-destinations),
 [shared source-version checks](../config.md#shared-source-version-checks), and
 [effective configuration diffs](../config.md#effective-configuration-diffs).
 The [strict composition contract](../config.md#strict-document-composition)
-owns sequence placement, registration, replacement, and history behavior; the
-[consumer guide](../consumers/README.md#identified-prompt-sequences) shows the
-maintained example.
+owns sequence declarations, identity, operations, ownership, and final
+validation; [CLI overrides](../config.md#explicit-cli-overrides) own override
+ordering. The [consumer guide](../consumers/README.md#identified-prompt-sequences)
+links maintained workflow examples.
 The [consumer adoption guide](../consumers/README.md) owns application guidance.
 The [architecture policy](../policy/architecture.md) owns contributor
 boundaries; [ADR 0006](../adr/0006-public-facade.md) records the facade decision
@@ -74,5 +76,7 @@ records the source-version decision.
 sequence placement and composition. [ADR 0015](../adr/0015-shared-dependency-ready-ordering.md)
 records the shared dependency-ready ordering decision; [ADR
 0016](../adr/0016-independent-import-controls.md) records the independent
-selection controls. The [import internals](imports.md) document candidate and
+selection controls. [ADR 0017](../adr/0017-collection-sequence-policy.md) and
+[ADR 0018](../adr/0018-cli-after-structural-resolution.md) record collection
+operations and CLI ordering. The [import internals](imports.md) document candidate and
 namespace identities, discovery and scheduling, and the bounded algorithms.