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claude-code - 💡(How to fix) Fix [FEATURE] Battery-aware agent scheduling — detect low battery, warn before expensive operations, auto-checkpoint [2 comments, 2 participants]

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anthropics/claude-code#51690•Fetched 2026-04-22 07:55:29
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Error Message

  • If below threshold (e.g., 20%), warn the user:

Code Example

⚠️ Battery at 15% — this operation typically takes 5-10 minutes with 4 parallel agents.
  Continue anyway / Defer / Run minimal (sequential instead of parallel)

---

◆ Spawning 4 researchers in parallel...
    Estimated: ~5 min, ~200K tokens
    Battery: 18% (~25 min remaining)
    Proceed? [Y/n]
RAW_BUFFERClick to expand / collapse

Problem

When running Claude Code on a laptop without a charger, there's no awareness of battery state. Long-running operations (parallel research agents, codebase mappers, background tasks) can drain the battery mid-execution, leaving work in an inconsistent state.

Real scenario: Running 4 parallel research agents + a synthesizer + background codebase mapping on a MacBook without a charger. Battery drops to critical levels. Options are: (1) go offline with no guarantee work is saved, or (2) sit anxiously watching the battery icon.

Proposed Solution

Claude Code should be battery-aware on laptop devices:

1. Pre-flight battery check before expensive operations

  • Before spawning parallel agents, long-running background tasks, or multi-step workflows, check battery level
  • If below threshold (e.g., 20%), warn the user: 
    ⚠️ Battery at 15% — this operation typically takes 5-10 minutes with 4 parallel agents.
Continue anyway / Defer / Run minimal (sequential instead of parallel)

2. Graceful checkpoint on critical battery

  • If battery drops below critical threshold (e.g., 5%) during execution:
    • Auto-commit WIP changes (git add -A && git commit -m "WIP: auto-checkpoint (low battery)")
    • Push to remote if configured
    • Save conversation context for /resume
    • Notify user: "Battery critical — work checkpointed and pushed. Resume with /gsd-resume-work or /resume."

3. Battery-aware scheduling

  • Background agents and run_in_background tasks could be deferred or throttled on low battery
  • /loop dynamic mode could factor battery into delay calculations
  • Status line could show battery level when below 30%

4. Estimated cost display

  • Before expensive operations, show estimated time/tokens so user can make an informed decision: 
    ◆ Spawning 4 researchers in parallel...
  Estimated: ~5 min, ~200K tokens
  Battery: 18% (~25 min remaining)
  Proceed? [Y/n]

Platform Support

  • macOS: pmset -g batt gives battery percentage and charging status
  • Linux: /sys/class/power_supply/BAT0/capacity and status
  • Windows: WMIC Path Win32_Battery Get EstimatedChargeRemaining

Detection is straightforward on all platforms.

Alternatives Considered

  • User responsibility: Users can check battery themselves, but Claude Code already manages long-running operations and has the context to make smart decisions
  • OS-level low power mode: Doesn't help — OS throttles CPU but doesn't know about Claude's token economics or git state

Additional Context

This becomes more important as Claude Code gets more agentic — parallel agents, background tasks, autonomous loops, and multi-step workflows all increase the chance of battery death mid-execution. The auto-checkpoint feature alone would save significant anxiety and lost work.

extent analysis

TL;DR

Implement a pre-flight battery check and auto-checkpoint feature to prevent work loss due to battery drain during long-running operations in Claude Code.

Guidance

  • Introduce a battery level check before starting expensive operations, such as spawning parallel agents or running background tasks, and warn the user if the battery level is below a certain threshold (e.g., 20%).
  • Implement an auto-checkpoint feature that saves work-in-progress changes and pushes them to a remote repository when the battery level drops below a critical threshold (e.g., 5%).
  • Consider integrating battery-aware scheduling for background agents and tasks to defer or throttle them when the battery level is low.
  • Display estimated time and token costs for expensive operations to help users make informed decisions about proceeding with the operation.

Example

import subprocess

def get_battery_level():
    # macOS
    output = subprocess.check_output(['pmset', '-g', 'batt'])
    # Parse output to extract battery percentage
    battery_level = int(output.decode('utf-8').split(':')[1].strip().split('%')[0])
    return battery_level

def auto_checkpoint():
    # Save WIP changes and push to remote repository
    subprocess.run(['git', 'add', '-A'])
    subprocess.run(['git', 'commit', '-m', 'WIP: auto-checkpoint (low battery)'])
    subprocess.run(['git', 'push'])

# Check battery level before starting expensive operation
if get_battery_level() < 20:
    print("⚠️ Battery at {}% — this operation typically takes 5-10 minutes with 4 parallel agents.".format(get_battery_level()))
    # Prompt user to continue, defer, or run minimal operation

Notes

The implementation details may vary depending on the specific platform (macOS, Linux, Windows) and the programming language used. The example code snippet provided is a simplified illustration of the concept and may require modifications to work in the actual Claude Code application.

Recommendation

Apply the proposed solution, including the pre-flight battery check and auto-checkpoint feature, to prevent work loss due to battery drain during long-running operations in Claude Code. This will provide a more robust and user-friendly experience, especially when running parallel agents, background tasks, and multi-step workflows.

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#model save/load#optimization#mixed precision#training loop#device allocation

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claude-code - 💡(How to fix) Fix [FEATURE] Battery-aware agent scheduling — detect low battery, warn before expensive operations, auto-checkpoint [2 comments, 2 participants]