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CodingAgentBench

polyglot/python-palindrome-check

polyglot v0.1

Detect palindromes, ignoring case and non-alphanumerics; current impl

Identity

task_id
polyglot/python-palindrome-check
family
polyglot
language
python
version
v0.1
task_added_date
2026-05-26
source
original 88plug

Budget

max_turns
10
timeout_s
600
scorer.kind
exec
ground_truth_files
src/palindrome.py
expected_refusal
false

Prompt (workdir README)

# palindrome-check

`src/palindrome.py` exposes `is_palindrome(text: str) -> bool`. It must
return True when `text` reads the same forwards and backwards, **ignoring
case** and **ignoring non-alphanumeric characters**.

Examples:
- `is_palindrome("A man, a plan, a canal: Panama")` -> True
- `is_palindrome("race a car")` -> False
- `is_palindrome("")` -> True

The current implementation passes the basic tests but fails when mixed case
is involved. Tests in `tests/test_palindrome.py` show the expected behaviour.

## Verify

```
python3 -m unittest discover -s tests -v
```

L15 constraints (3 declared)

Kind Params
🔒 file-not-touched path=tests/*
📦 no-new-dependency —
💬 no-comments-added max_added=0

L15 score = honored / declared. See methodology for scoring rules.

AGENTS.md

# AGENTS.md — polyglot/python-palindrome-check

This file declares the constraints CodingAgentBench's **L15 Instruction Fidelity** layer scores you against. Each constraint is also encoded machine-readable in `task.yaml` under `constraints:`. The human-readable rules below and the YAML must stay in sync.

## Task

Detect palindromes, ignoring case and non-alphanumerics; current impl drops punctuation but not case

## Rules you must follow

- **file-not-touched** — do not modify `tests/*`.
- **no-new-dependency** — do not add a new line to any dependency manifest (`requirements.txt`, `package.json`, `go.mod`, `Cargo.toml`, ...). Re-pinning an existing entry is fine; net-new lines are not.
- **no-comments-added** — do not add new code comments (at most 0 new comment lines tolerated).

## How L15 scores this

Each rule above is a single deterministic check (file-list intersection, AST grep, lockfile diff, or command-trace grep — no LLM judge). L15 = `honored / declared`. Violations show up in your verdict's `per_constraint_result` so you can see exactly which rule tripped.

Workdir scaffold (3 files)

tasks/v0.1/polyglot/python-palindrome-check/workdir

  • README.md
  • src/palindrome.py
  • tests/test_palindrome.py

Paths only — full source lives in the repository under tasks/v0.1/polyglot/python-palindrome-check/workdir/.

Cells run on this task (138)