Openspec fixups

openspec/changes/declpac-cli-tool/specs/input-merging/spec.md

@@ -18,7 +18,6 @@ strategy without conflict resolution.
 - **WHEN** stdin contains packages not in state files
 - **THEN** those packages shall be added to the final state
 
-#### Scenario: Duplicate packages accumulate
+#### Scenario: Duplicate packages are deduplicated
 - **WHEN** the same package appears in multiple inputs
-- **THEN** it shall be included multiple times in the final state (pacman
-  handles duplicates)
+- **THEN** it shall be included once in the final state (map deduplication)

openspec/changes/declpac-cli-tool/specs/orphan-cleanup/spec.md

@@ -17,7 +17,7 @@ After syncing, the system SHALL remove packages that are no longer required
 
 #### Scenario: Orphan cleanup after sync
 - **WHEN** sync operation completes successfully
-- **THEN** system shall run pacman -Rsu to remove unneeded dependencies
+- **THEN** system shall run pacman -Rns to remove unneeded dependencies
 - **AND** report the number of packages removed
 
 #### Scenario: Orphan cleanup respects explicitly installed

openspec/changes/declpac-cli-tool/specs/pacman-sync/spec.md

@@ -10,7 +10,7 @@ The system SHALL execute pacman operations to install and upgrade all declared p
 
 #### Scenario: No partial upgrades
 - **WHEN** running pacman commands
-- **THEN** system shall use -Syu flag (full system upgrade) ensuring all packages are latest
+- **THEN** system shall use -S --needed flag (sync with skip if up-to-date) ensuring declared packages are present
 
 #### Scenario: Package availability check
 - **WHEN** a package from input is not in pacman repositories