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uloop-record-input

Testing & Quality
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Record PlayMode keyboard and mouse input to JSON. Use to capture gameplay, bug repro, or E2E input sequences for replay.

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How to use this skill

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Source SKILL.md: https://github.com/kurotu/VRCQuestTools/blob/HEAD/.claude/skills/uloop-record-input/SKILL.md

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npx --yes uloop-cli@2.2.0 record-input

Record keyboard and mouse input during PlayMode frame-by-frame into a JSON file. Captures key presses, mouse movement, clicks, and scroll events via Input System device state diffing.

Usage

# Start recording
npx --yes uloop-cli@2.2.0 record-input --action Start

# Start recording with key filter
npx --yes uloop-cli@2.2.0 record-input --action Start --keys "W,A,S,D,Space"

# Stop recording and save
npx --yes uloop-cli@2.2.0 record-input --action Stop

# Stop and save to specific path
npx --yes uloop-cli@2.2.0 record-input --action Stop --output-path scripts/my-play.json

Parameters

ParameterTypeDefaultDescription
--actionenumStartStart - begin recording, Stop - stop and save
--output-pathstringautoSave path. Auto-generates under .uloop/outputs/InputRecordings/
--keysstring""Comma-separated key filter. Empty = all common game keys

Deterministic Replay

Replay injects input frame-by-frame, so the game must also be deterministic to produce identical results. If the recording will be used for E2E tests, bug reproduction, or replay verification, read references/deterministic-replay.md before designing assertions or game logic.

Prerequisites

  • Unity must be in PlayMode
  • Input System package must be installed (com.unity.inputsystem)
  • Use this only when the project already uses the New Input System.

Output

The CLI prints JSON with:

  • Success: Whether the operation succeeded
  • Message: Status message
  • Action: Echoes which action was executed (Start or Stop)
  • OutputPath: Path to saved recording (nullable; populated on Stop only)
  • TotalFrames: Number of frames recorded (nullable int; populated on Stop only)
  • DurationSeconds: Recording duration in seconds (nullable float; populated on Stop only)

The CLI output contains only these six payload fields. Internal metadata such as Ver is removed before printing. There is no RecordingId, StartTimestamp, KeysCaptured, or per-frame data in the response — frame data lives only in the JSON file at OutputPath.