name: change-tracking
description: Evaluates change-tracking guidance against EF Core snapshot and entry-state code.
type: capability
defaults:
  runs: ${RUNS=5}
  model: ${MODEL=gpt-6.1-sol}
  judge_model: ${JUDGE_MODEL=gpt-6.1-terra}
  judge_reasoning_effort: ${JUDGE_REASONING_EFFORT=medium}
  judge_timeout: ${JUDGE_TIMEOUT=10m}
  executor: copilot-sdk
agent_environment:
  skills:
    - ../../../../.agents/skills/change-tracking
stimuli:
  - name: diagnose-replaced-owned-graph-corruption
    prompt: |-
      Inspect the staged change-tracking implementation and JSON update tests. Replacing a JSON-owned root with a new instance that reuses its nested leaf persists correctly, but after SaveChanges the replacement graph's leaf is null in memory.

      A proposed fix makes `EntityGraphAttacher` process every entry in `Deleted` state and makes `StateManager.CascadeDelete` return early whenever the entry is `Deleted`. Write analysis.md with the corrected implementation and focused regression-test plan. Do not edit source.
    constraints:
      max_turns: 80
      max_tokens: 2000000
      max_duration: ${EVAL_TIMEOUT=30m}
    agent_environment:
      files:
        - src: ../../../../src/EFCore/ChangeTracking/Internal/EntityGraphAttacher.cs
          dest: src/EFCore/ChangeTracking/Internal/EntityGraphAttacher.cs
        - src: ../../../../src/EFCore/ChangeTracking/Internal/StateManager.cs
          dest: src/EFCore/ChangeTracking/Internal/StateManager.cs
        - src: ../../../../test/EFCore.Relational.Specification.Tests/Update/JsonUpdateTestBase.cs
          dest: test/EFCore.Relational.Specification.Tests/Update/JsonUpdateTestBase.cs
    rubric:
      - The analysis uses `SharedIdentityEntry`, not broad Added/Deleted state checks, to identify an old entry and its replacement.
      - It allows a deleted nested entry through EntityGraphAttacher only when the graph source has a shared-identity replacement, and skips cascading from the replaced old principal; synchronous and asynchronous paths remain equivalent.
      - The regression replaces the root while reusing a nested reference, preserves unrelated branch values, and verifies the same nested object/value remains intact in memory after SaveChanges.
    graders:
      - type: file-matches
        config:
          path: analysis.md
          pattern: (?i)(?=[\s\S]*SharedIdentityEntry)(?=[\s\S]*EntityGraphAttacher)(?=[\s\S]*CascadeDelete)(?=[\s\S]*(nested|leaf|replacement))[\s\S]+
      - type: prompt
        config:
          scoring: binary
          threshold: 1
          evidence:
            - trajectory
            - repo
      - type: token-budget
        config:
          max: 2000000
scoring:
  timeout: ${SCORING_TIMEOUT=10m}
  weights:
    file-matches: 0.27
    prompt: 0.63
    token-budget: 0.1
  threshold: 0.75