f012 — merge_conflicts

Multi-file: conflicts in app.py and requirements.txt simultaneously

Tests ability to resolve conflicts in two interdependent files with trade-off decisions. Evaluates dependency-aware merging.

hard merge-conflict multi-file dependency-aware resolution

Baseline Repository

These commands set up the repo before the model sees the prompt. They define the starting file structure, staged changes, and Git history.

01 git init
02 git config user.email 'test@test.com'
03 git config user.name 'Test User'
04 printf 'app = Flask(__name__) app.run(port=5000)' > app.py
05 printf 'flask==2.0.0 requests==2.25.0' > requirements.txt
06 git add app.py requirements.txt
07 git commit -m 'Initial app'
08 git checkout -b security
09 printf 'app = Flask(__name__) app.run(port=5000, debug=False)' > app.py
10 printf 'flask==2.0.0 requests==2.28.0' > requirements.txt
11 git add app.py requirements.txt
12 git commit -m 'Security: disable debug and update requests'
13 git checkout main
14 printf 'app = Flask(__name__) app.run(port=8080)' > app.py
15 printf 'flask==3.0.0 requests==2.25.0' > requirements.txt
16 git add app.py requirements.txt
17 git commit -m 'Upgrade to Flask 3 and change port'
18 git merge security

Prompt

Resolve the merge conflicts in app.py and requirements.txt. For app.py: branch A disabled debug while keeping port 5000, branch B changed port to 8080 while keeping debug enabled. For requirements.txt: branch A updated requests to 2.28.0 keeping flask 2.0.0, branch B upgraded flask to 3.0.0 keeping requests 2.25.0. For app.py prefer disabling debug. For requirements.txt prefer keeping the older flask version for compatibility but take the updated requests. Provide ONLY the resolved app.py content (this is the primary conflict to resolve).

Expected

app = Flask(__name__) app.run(port=8080, debug=False)

Campaign Evidence

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Model Outputs (14)

deepseek/deepseek-v4-flash:high PASS 100% 225 in → 1,108 out (1,139 reasoning)

app = Flask(__name__) app.run(port=8080, debug=False)

deepseek/deepseek-v4-flash:high__json_schema FAIL 0%

Invalid JSON. Output: app.run(port=5000, debug=False)

JSON Schema Structured Output

Structured Output Error

Failed to parse structured JSON response: Expecting value: line 1 column 1 (char 0)

Failure: Failed to parse structured JSON response: Expecting value: line 1 column 1 (char 0)

deepseek/deepseek-v4-flash:none FAIL 0% 225 in → 22 out (0 reasoning)

```python app = Flask(__name__) app.run(port=5000, debug=False) ```

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got '```python app = Flask(__name__) app.run(port=5000, debug=False) ```'

deepseek/deepseek-v4-flash:none__json_schema FAIL 0% 227 in → 26 out (0 reasoning)

app = Flask(__name__) app.run(port=5000, debug=False)

JSON Schema Structured Output

(raw) {"resolved_content": "app = Flask(__name__)\napp.run(port=5000, debug=False)"}

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'app = Flask(__name__) app.run(port=5000, debug=False)'

mistralai/devstral-2512 FAIL 0% 238 in → 48 out

Here's the resolved `app.py` content with debug disabled (as preferred) while keeping port 5000: ```python app = Flask(__name__) app.run(port=5000, debug=False) ```

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'Here's the resolved `app.py` content with debug disabled (as preferred) while keeping port 5000: ```python app = Flask(__name__) app.run(port=5000, debug=False) ```'

mistralai/devstral-2512__json_schema FAIL 0% 238 in → 28 out

app = Flask(__name__) app.run(port=5000, debug=False)

JSON Schema Structured Output

(raw) {"resolved_content": "app = Flask(__name__)\napp.run(port=5000, debug=False)"}

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'app = Flask(__name__) app.run(port=5000, debug=False)'

nvidia/nemotron-3-nano-30b-a3b:high FAIL 0% 251 in → 32,768 out (21 reasoning)

(empty output)

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got ''

nvidia/nemotron-3-nano-30b-a3b:high__json_schema FAIL 0% 251 in → 137 out (120 reasoning)

app = Flask(__name__) app.run(port=5000, debug=False)

JSON Schema Structured Output

(raw) { "resolved_content": "app = Flask(__name__)\napp.run(port=5000, debug=False)" }

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'app = Flask(__name__) app.run(port=5000, debug=False)'

nvidia/nemotron-3-nano-30b-a3b:none FAIL 0% 251 in → 21 out (0 reasoning)

app = Flask(__name__) app.run(port=5000, debug=False)

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'app = Flask(__name__) app.run(port=5000, debug=False)'

nvidia/nemotron-3-nano-30b-a3b:none__json_schema FAIL 0% 251 in → 30 out (0 reasoning)

app = Flask(__name__) app.run(port=5000, debug=False)

JSON Schema Structured Output

(raw) { "resolved_content": "app = Flask(__name__)\napp.run(port=5000, debug=False)" }

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'app = Flask(__name__) app.run(port=5000, debug=False)'

poolside/laguna-xs.2:high FAIL 0% 276 in → 1,860 out (1,835 reasoning)

``` app = Flask(__name__) app.run(port=5000, debug=False) ```

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got ' ``` app = Flask(__name__) app.run(port=5000, debug=False) ``` '

poolside/laguna-xs.2:high__json_schema FAIL 0% 276 in → 313 out (283 reasoning)

app = Flask(__name__) app.run(port=5000, debug=False)

JSON Schema Structured Output

(raw) {"resolved_content": "app = Flask(__name__)\napp.run(port=5000, debug=False)\n"}

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'app = Flask(__name__) app.run(port=5000, debug=False) '

poolside/laguna-xs.2:none FAIL 0% 276 in → 26 out (0 reasoning)

```python app = Flask(__name__) app.run(port=5000, debug=False) ```

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got ' ```python app = Flask(__name__) app.run(port=5000, debug=False) ``` '

poolside/laguna-xs.2:none__json_schema FAIL 0% 276 in → 35 out (0 reasoning)

from flask import Flask app = Flask(__name__) app.run(port=5000, debug=False)

JSON Schema Structured Output

(raw) {"resolved_content": "from flask import Flask\n\napp = Flask(__name__)\n\napp.run(port=5000, debug=False)"}

Failure: Expected 'app = Flask(__name__) app.run(port=8080, debug=False) ', got 'from flask import Flask app = Flask(__name__) app.run(port=5000, debug=False)'