# Bidirectional breadth-first collision-checked grid path: robotics skill example

Bidirectional breadth-first collision-checked grid path. Parameterized bounded JSON adapter; numerical operation, no hardware execution.

## Task and environment

pythonrobotics | cdd0cc888802 | mathematical-model | json-contract-v1 | windows | 3.10
pythonrobotics | cdd0cc888802 | mathematical-model | json-contract-v1 | linux | 3.10

## Example input

```json
{
  "start": [
    2,
    2
  ],
  "goal": [
    18,
    18
  ],
  "bounds": [
    0,
    20
  ],
  "obstacles": [
    [
      10,
      1
    ],
    [
      10,
      2
    ],
    [
      10,
      3
    ],
    [
      10,
      4
    ],
    [
      10,
      5
    ],
    [
      10,
      6
    ],
    [
      10,
      7
    ],
    [
      10,
      8
    ],
    [
      10,
      9
    ],
    [
      10,
      10
    ],
    [
      10,
      11
    ],
    [
      10,
      12
    ]
  ],
  "robot_radius": 0.3
}
```

## Retrieve and prepare

Read https://hub.superfastrobotics.com/skills/pythonrobotics-bidirectional-breadth-first-planner/skill.json or https://api.superfastrobotics.com/v1/skills/pythonrobotics-bidirectional-breadth-first-planner?hub_commit=ede75c00118e9808e5099da43c26f4619cc3bc37&record_version=1.0.0&include=experience without installing a client. Inspect the license, exact environment and evidence before preparation. Preparation and execution remain separate.

Source: https://github.com/AtsushiSakai/PythonRobotics at cdd0cc888802b584c2d654ca85e3c5460973487d. Record version: 1.0.0.

## Success condition

Exit 0, status=task_complete, success=true, finite outputs satisfying interface.output_schema and all declared numerical/model checks. This is not a physical robot or general task-success claim.

## Recorded evidence

task_complete: Three frozen positive cases passed against this exact adapter; see per-case receipts. This does not estimate general accuracy.

This page is a data-only example and performs no execution.