Reduce CI cleaner frequency from hourly to 2-3 hour intervals

[Copilot]

The Hourly CI Cleaner accounts for ~29% of Copilot token spend despite running when there's often no work. This reduces execution frequency from 24 to 10 runs per day.

Changes

• Peak hours (9 AM - 5 PM UTC): Every 2 hours instead of hourly

  schedule:
    - cron: "0 9-17/2 * * *"  # 9 AM, 11 AM, 1 PM, 3 PM, 5 PM

• Off-peak hours: Every 3 hours

  schedule:
    - cron: "0 0,3,6,18,21 * * *"  # 12 AM, 3 AM, 6 AM, 6 PM, 9 PM

• Updated workflow description to reflect schedule change

Impact

• 58% fewer runs: 24 → 10 runs per day
• ~17% reduction in overall token spend: CI cleaner drops from 29% to ~12% of total
• Maintains CI health with denser coverage during active development hours

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/user
  • Triggering command: /usr/bin/gh gh api user --jq .login b/workflows GOPROXY (http block)
  • Triggering command: /usr/bin/gh gh api user --jq .login ithub/workflows x_amd64/compile /usr/bin/git l /tmp/gh-aw-mergerev-parse 64/bin/go git rev-�� f/tags/v6 sed (http block)
  • Triggering command: /usr/bin/gh gh api user --jq .login it/ref/tags/330a01c490aca151604b8cf639adc76d48f6remote.origin.url git e/git-remote-https te '**/*.cjs' '*infocmp Reduce CI cleane-1 64/bin/go e/git-remote-https om/a�� om/actions/upload-artifact.git sh ache/node/24.12.0/x64/bin/node by/8d72346cbece7gh git 64/bin/go git (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[plan] Reduce Hourly CI Cleaner schedule frequency to off-peak hours</issue_title>
<issue_description>## Objective

Reduce the Hourly CI Cleaner workflow execution frequency from every hour to every 2-3 hours during off-peak times to cut token spend.

Context

The Copilot Token Report (referenced in discussion #7407) shows that Hourly CI Cleaner alone accounts for ~29% of Copilot token spend, despite low average cost per run. Running every hour is excessive when there may not be work to do. Reducing frequency can save ~$5-7/month.

Approach

1. Locate the Hourly CI Cleaner workflow file
2. Modify the schedule from hourly to:
   • Every 2 hours during peak hours (9 AM - 5 PM UTC)
   • Every 3 hours during off-peak hours
3. Document the rationale for the schedule change
4. Monitor token usage after implementation

Files to Modify

• Search for workflow file with schedule trigger running hourly (likely in .github/workflows/)
• Update cron expression in frontmatter

Example Schedule Change

# Before
on:
  schedule:
    - cron: '0 * * * *'  # Every hour

# After
on:
  schedule:
    - cron: '0 */2 * * *'  # Every 2 hours

Acceptance Criteria

• Workflow schedule updated to run less frequently
• Documentation explains the reduced schedule
• Token usage monitoring shows ~29% reduction in scheduled spend
• CI cleanup still functions effectively despite reduced frequency

Expected Impact

• Cuts ~29% of Copilot token spend
• Saves approximately $5-7/month
• Maintains CI cleanup effectiveness
  Related to [plan] Address DeepReport Intelligence Briefing findings (Dec 23, 2025) #7410

AI generated by Plan Command for discussion #7407

Comments on the Issue (you are @copilot in this section)

• Fixes [plan] Reduce Hourly CI Cleaner schedule frequency to off-peak hours #7412

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