@multi-project-sandbox
Feature: Per-resource sandboxes for multi-project plans (#7270)
  Per spec §19310-19312, each resource gets its own sandbox and
  Apply commits each sandbox separately.

  Scenario: Single-resource plan creates one sandbox for mps
    Given a temp git project "alpha" for mps
    And a mocked plan service linking project "alpha" for mps
    When I call _create_sandbox_for_plan for mps
    Then sandbox_infos should have 1 entry for mps
    And sandbox_root should be a directory for mps

  Scenario: Multi-resource plan creates sandboxes for each resource for mps
    Given a temp git project "alpha" for mps
    And a temp git project "beta" for mps
    And a mocked plan service linking projects "alpha" and "beta" for mps
    When I call _create_sandbox_for_plan for mps
    Then sandbox_infos should have 2 entries for mps
    And each sandbox_info should have a different sandbox_path for mps

  Scenario: Route files moves file to correct worktree for mps
    Given a temp git project named "alpha" containing "src/app.py" for mps
    And a temp git project named "beta" containing "src/api.py" for mps
    And a mocked plan service linking projects "alpha" and "beta" for mps
    And sandbox_infos for both projects for mps
    And a file "src/api.py" exists in the primary sandbox for mps
    When I call _route_sandbox_files_to_worktrees for mps
    Then "src/api.py" should exist in the beta sandbox for mps
    And "src/api.py" should not exist in the alpha sandbox for mps

  Scenario: Route files preserves primary file when both projects share path for mps
    Given a temp git project named "alpha" containing "README.md" for mps
    And a temp git project named "beta" containing "README.md" for mps
    And a mocked plan service linking projects "alpha" and "beta" for mps
    And sandbox_infos for both projects for mps
    And the file "README.md" in the primary sandbox is overwritten with "ROUTED_CONTENT" for mps
    When I call _route_sandbox_files_to_worktrees for mps
    Then "README.md" in the alpha sandbox should contain "ROUTED_CONTENT" for mps
    And "README.md" in the beta sandbox should not contain "ROUTED_CONTENT" for mps

  Scenario: Route files is a no-op for single resource for mps
    Given a temp git project named "alpha" containing "src/app.py" for mps
    And sandbox_infos with only one entry for mps
    And a file "src/app.py" exists in the primary sandbox for mps
    When I call _route_sandbox_files_to_worktrees for mps
    Then "src/app.py" should still exist in the alpha sandbox for mps

  Scenario: Apply merges multiple worktrees separately for mps
    Given a temp git project "alpha" with a worktree branch for mps
    And a temp git project "beta" with a worktree branch for mps
    And a mocked plan service linking projects "alpha" and "beta" for mps
    When I call _apply_sandbox_changes for mps
    Then both projects should have the merged changes for mps
    And the console output should contain "Apply Summary" for mps

  Scenario: Partial apply continues when one merge fails for mps
    Given a temp git project "alpha" with a worktree branch for mps
    And a temp git project "beta" with a conflicting worktree branch for mps
    And a mocked plan service linking projects "alpha" and "beta" for mps
    When I call _apply_sandbox_changes for mps
    Then alpha should have the merged changes for mps
    And beta should have the original content for mps
    And _apply_sandbox_changes should return False for mps