Overnight runner

Captures the task being discussed right now, schedules a Windows Task Scheduler job that runs claude -p headless at the chosen time (the machine wakes itself), and writes a result that the morning session shows automatically.

Files: scripts live in ~/.claude/overnight/bin/. You orchestrate; the PowerShell does the work.

Steps

1. Settle the parameters

Infer from the conversation; ask only if genuinely ambiguous.

• Schedule → RunAt (local yyyy-MM-dd HH:mm). Default next 02:00 (tomorrow if 2 AM already passed today). Parse "in 90m", "tonight", "at 3", "tomorrow 04:00" relative to the current date/time in context. Must be in the future.
• Mode: build if the task writes code/files; research if it only investigates/reads/searches and produces a written report.
• ProjectDir: the current working directory (absolute path).
• MaxTurns: default 60; raise for large build tasks, lower (1–3) for trivial ones.
• Goal: one crisp human-readable line (shown in the morning summary).

2. Write a self-contained brief

The overnight run starts fresh — it sees only this brief plus the project files, NOT this conversation. So the brief must stand alone. Write it to a temp file (e.g. ~/.claude/overnight/_brief_tmp.md) containing:

• Objective — what to accomplish.
• Context — everything relevant from this conversation: decisions made, constraints, paths, prior findings, links.
• Deliverables — concrete outputs (files to create/modify, or the report to produce).
• Definition of done — how the run knows it succeeded.
• Guardrails — what NOT to touch. For build tasks, instruct it to leave changes in the working tree and NOT run git commit/push — the runner commits to an isolated branch automatically. Telling it to commit wastes turns and can hit the turn limit.

Be generous and explicit — under-specifying is the main failure mode.

3. Schedule it

Run (Windows, pwsh):

pwsh -NoProfile -File "$HOME/.claude/overnight/bin/new-job.ps1" `
  -Goal "<one line>" `
  -BriefPath "$HOME/.claude/overnight/_brief_tmp.md" `
  -RunAt "2026-01-01 02:00" `
  -Mode build `
  -ProjectDir "<cwd>" `
  -MaxTurns 60

Optional: -Model opus, -AllowedTools "Read Edit Write Glob Grep Bash", -NoWorktree (build directly in the project with no branch isolation — only if the user insists).

4. Confirm

Relay the script's confirmation block (id, fire time, mode, branch, wake status). Then delete the temp brief. Tell the user: results appear automatically at the start of their next session; build work lands on branch overnight/<id> (review with git checkout), main untouched.

Reliability notes (mention only if asked)

• Machine wakes via Task Scheduler -WakeToRun; missed starts run on next wake (-StartWhenAvailable).
• One retry on failure, then a lighter-model fallback on overload; a result.md is always written, even on crash.
• Runs serialized (global mutex) so two jobs never contend.
• Cancel: Unregister-ScheduledTask 'OvernightClaude-<id>'. List: Get-ScheduledTask 'OvernightClaude-*'.
• On subscription plans, headless claude -p may draw from a separate Agent SDK credit pool — check your plan's current terms before relying on heavy unattended runs.