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Time Zero

Agent skill
1 skill

Use when defining or auditing "time zero" (start of follow-up) in a target trial emulation — when an analysis needs to align eligibility, treatment assignment, and start of follow-up, when there is risk of immortal-time or prevalent-user selection bias, when individuals are eligible at multiple times, or to decide between a single emulated trial and sequential (nested) trials.

Install with
Claude CodeCodexCursorGitHub CopilotGemini CLI

Supported by the Atlas install prompt. Skill-specific requirements vary.

Skill stats

Skills1CategoryGeneralStars0

About this skill

Use when defining or auditing "time zero" (start of follow-up) in a target trial emulation — when an analysis needs to align eligibility, treatment assignment, and start of follow-up, when there is risk of immortal-time or prevalent-user selection bias, when individuals are eligible at multiple times, or to decide between a single emulated trial and sequential (nested) trials.

Quick start

  1. Copy the install prompt. Use the green button above this README.
  2. Send it to your agent. Paste it into your coding agent’s chat and send.
  3. Review the setup. Your agent checks the skill’s instructions, requirements, and installation scope.
Review, license & listing details
Review the source before using this skill

This is an imported listing. We haven’t certified its safety, license, or compatibility. Skills may include executable scripts.

Automated security scan: Partial

Only SKILL.md was scanned. Supporting files and scripts were not checked. No safety grade has been assigned.

0 potential findings · Scanned 11/4/2026 · Scanner 0.2.1

Content SHA-256: 0fd17c6116db72f2aa478df10a74f0e31291ab0a5f2d35898f301400aa4cc0f3

About scan coverage and limitations

About this listing

Category
General
Reported license
MIT
Listing language (estimated)
English
Review status
Not individually reviewed
Agent compatibility
Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.
Time Zero | Agent Skills Atlas