Feature: TUI Reference Parser Coverage
  Scenarios targeting uncovered lines in
  src/cleveragents/tui/input/reference_parser.py

  Background:
    Given the reference parser module is imported

  Scenario: Escaped at-sign token is passed through literally
    Given the catalog is mocked with minimal data
    When I parse references from the line "\@mention is escaped"
    Then the expanded line should be "@mention is escaped"
    And there should be no resolved matches
    And there should be no unresolved tokens

  Scenario: Typed reference with valid category resolves successfully
    Given the catalog is mocked with resource entries "README.md" and "src/main.py"
    When I parse references from the line "check @resource:README please"
    Then the expanded line should contain "@resource:README.md"
    And there should be 1 resolved match
    And the resolved match category should be "resource"

  Scenario: Typed reference with valid category fails to resolve
    Given the catalog is mocked with resource entries "README.md" and "src/main.py"
    When I parse references from the line "@resource:zzzznonexistent"
    Then "@resource:zzzznonexistent" should be in the unresolved tokens
    And the expanded line should be "@resource:zzzznonexistent"

  Scenario: Untyped reference fails to resolve across all categories
    Given the catalog is mocked with empty lists for all categories
    When I parse references from the line "@totallyunknown"
    Then "@totallyunknown" should be in the unresolved tokens
    And the expanded line should be "@totallyunknown"

  Scenario: Unknown category prefix falls through to untyped resolution
    Given the catalog is mocked with empty lists for all categories
    When I parse references from the line "@badcategory:something"
    Then "@badcategory:something" should be in the unresolved tokens

  Scenario: ValueError fallback in catalog file collection uses absolute path
    Given the catalog cache is invalidated
    And os.walk is mocked to return a path outside the working directory
    When I build the catalog
    Then the catalog resource list should contain the absolute fallback path

  Scenario: Typed reference with plan category resolves
    Given the catalog is mocked with plan entries "sprint-1" and "sprint-2"
    When I parse references from the line "@plan:sprint-1"
    Then the expanded line should be "@plan:sprint-1"
    And there should be 1 resolved match
    And the resolved match category should be "plan"

  Scenario: Multiple tokens mix resolved and unresolved with categories
    Given the catalog is mocked with actor entries "local/writer" and "local/coder"
    When I parse references from the line "@actor:writer and @actor:zzzznothing"
    Then there should be 1 resolved match
    And "@actor:zzzznothing" should be in the unresolved tokens