berkekcay/link-shortener-agent-ready

Implement a link-shortener task

Follow these steps in order. Stop and ask if the task is unclear or needs something listed under "Ask a person before" in AGENTS.md.

1. Read. Open AGENTS.md, the chosen task in docs/TASKS.md, and tests/AGENTS.md. Work on that one task only.

2. Inspect. Read main.py (the table, encode(), the request model and both routes) and tests/test_main.py. Note anything the task interacts with, for example how codes are generated or how the database is shared between runs.

3. State the plan. Before editing, write down:

   • the expected behavior, including status codes and response bodies for success and each failure;
   • the files you will change;
   • edge cases (empty or odd input, collisions with existing codes, values that repeat).

4. Write a failing test. Add behavioral tests in tests/test_main.py following tests/AGENTS.md: at least one success and one failure case. Run them and confirm they fail for the right reason (the feature is missing, not a typo):

   pytest tests/test_main.py -k <new_test_name>
   

5. Implement the smallest change in main.py that makes the tests pass. Keep existing behavior and response shapes. If the table needs a new column, add it so an existing links.db still works (or explain why it must be recreated).

6. Run everything.

   pytest
   

   All original and new tests must pass. Fix and re-run until they do.

7. Summarize in this shape:

   Task:
   Behavior:
   Files changed:
   Tests added:
   pytest result:
   Remaining risks: