add validation specification

validation/core/docs/specifications/bazel_component.md

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+<!-- ----------------------------------------------------------------------------
+  Copyright (c) 2026 Contributors to the Eclipse Foundation
+
+  See the NOTICE file(s) distributed with this work for additional
+  information regarding copyright ownership.
+
+  This program and the accompanying materials are made available under the
+  terms of the Apache License Version 2.0 which is available at
+  https://www.apache.org/licenses/LICENSE-2.0
+
+  SPDX-License-Identifier: Apache-2.0
+----------------------------------------------------------------------------- -->
+
+# Bazel Component Specification
+
+## Purpose
+
+Define the consistency rules between the indexed Bazel architecture and the
+indexed PlantUML component diagram.
+
+This validator checks whether the same SEooC packages, components, and units
+exist on both sides after model normalization.
+
+## What is Validated
+
+A dependable element must be defined both in Bazel and in PlantUML. The validator checks:
+
+- top-level dependable element: PlantUML `package <<SEooC>>` vs. Bazel dependable element
+- names: PlantUML `alias` when present, otherwise `id` vs. Bazel target name
+- components: PlantUML `<<component>>` vs. Bazel component under the expected parent
+- units: PlantUML `<<unit>>` vs. Bazel unit under the expected component
+- parent context must match
+- matching is case-insensitive
+
+In the common case, components nested directly under the dependable element use
+the dependable element alias as parent. More deeply nested components use their
+immediate enclosing component alias as parent.
+
+## Failure Cases
+
+### Missing in PlantUML
+
+Validation fails when Bazel defines a dependable element, component, or unit
+that is not present in the PlantUML diagram.
+
+This includes cases where the name exists in PlantUML but under the wrong
+parent, or with the wrong stereotype.
+
+### Extra in PlantUML
+
+Validation fails when PlantUML contains a dependable element, component, or
+unit that does not have a corresponding definition in Bazel.
+
+This ensures the diagram does not introduce additional structure beyond what is
+declared in the Bazel architecture.
+
+## Debug Output
+
+The validator appends a debug log containing:
+
+- all diagram entities
+- filtered entity counts
+- all normalized PlantUML keys
+- all normalized Bazel keys
+
+## Example
+
+In Bazel BUILD files, the same structure can be declared like this:
+
+```starlark
+component(
+  name = "component_example",
+  components = [
+    "//bazel/rules/rules_score/examples/seooc/unit_1:unit_1",
+    "//bazel/rules/rules_score/examples/seooc/unit_2:unit_2",
+  ],
+)
+
+dependable_element(
+  name = "safety_software_seooc_example",
+  components = [":component_example"],
+)
+
+unit(
+  name = "unit_1",
+)
+
+unit(
+  name = "unit_2",
+)
+```
+
+When exported into the indexed Bazel architecture, these targets produce keys such as:
+
+If the Bazel architecture JSON contains:
+
+- dependable element: `safety_software_seooc_example` -> key: `("safety_software_seooc_example", None)`
+- component: `@//bazel/rules/rules_score/examples/seooc:component_example` -> key: `("component_example", Some("safety_software_seooc_example"))`
+- unit: `@//bazel/rules/rules_score/examples/seooc/unit_1:unit_1` -> key: `("unit_1", Some("component_example"))`
+- unit: `@//bazel/rules/rules_score/examples/seooc/unit_2:unit_2` -> key: `("unit_2", Some("component_example"))`
+
+then PlantUML must contain entities with the same normalized keys:
+
+```plantuml
+package "Sample Seooc" as safety_software_seooc_example <<SEooC>> {
+    component "Component Example" as component_example <<component>> {
+        component "Unit 1" as unit_1 <<unit>>
+        component "Unit 2" as unit_2 <<unit>>
+    }
+}
+```

validation/core/docs/specifications/component_sequence.md

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+<!-- ----------------------------------------------------------------------------
+  Copyright (c) 2026 Contributors to the Eclipse Foundation
+
+  See the NOTICE file(s) distributed with this work for additional
+  information regarding copyright ownership.
+
+  This program and the accompanying materials are made available under the
+  terms of the Apache License Version 2.0 which is available at
+  https://www.apache.org/licenses/LICENSE-2.0
+
+  SPDX-License-Identifier: Apache-2.0
+----------------------------------------------------------------------------- -->
+
+# Component Sequence Specification
+
+## Purpose
+
+Define the intended consistency rules between component-diagram units and the
+participants observed in sequence diagrams.
+
+This validator checks whether unit aliases from component diagrams match the
+set of used participants collected from sequence diagrams.
+
+## What is Validated
+
+Component-diagram units and sequence-diagram participants must match. The validator checks:
+
+- unit aliases from the component diagram vs. participant aliases used in sequence diagrams
+- matching is case-sensitive
+
+## Failure Cases
+
+### Missing sequence participant
+
+Validation fails when a unit alias defined in the component diagram does not
+appear among the participants used in the sequence diagrams.
+
+### Unexpected sequence participant
+
+Validation fails when a sequence diagram uses a participant alias that does not
+correspond to any unit alias declared in the component diagram.
+
+## Debug Output
+
+The validator emits a debug view containing:
+
+- expected unit aliases
+- observed caller/callee participants
+
+## Example
+
+If the component diagram defines the unit aliases `unit_1` and `unit_2`, then
+the sequence diagrams must use the same participant aliases.
+
+```plantuml
+' component diagram
+package "Package A" as package_a <<SEooC>> {
+  component "Component A" as component_a <<component>> {
+    component "Unit 1" as unit_1 <<unit>>
+    component "Unit 2" as unit_2 <<unit>>
+  }
+}
+
+' sequence diagram
+participant "Unit 1" as unit_1
+participant "Unit 2" as unit_2
+
+unit_1 -> unit_2 : SendSignal
+unit_2 --> unit_1 : Ack
+```