[copilot-opt] Duplicate concurrent workflow instances on Agentic Commands and Q workflows

[github-actions]

Problem

The Agentic Commands and Q workflows fire multiple identical instances at the same timestamp on the same branch. On 2026-06-08, four exact-duplicate pairs were triggered within a 1-second window on copilot/formal-spec-awf-config-sources-spec, resulting in wasted compute and potential race conditions between parallel agent sessions.

Evidence

• Analysis window: 2026-05-25 to 2026-06-08
• Sessions analyzed: 50
• Key metrics and examples:
  • Agentic Commands fired twice at 2026-06-08T17:41:33Z on copilot/formal-spec-awf-config-sources-spec (run IDs: 27155900106, 27155900035)
  • Agentic Commands fired twice again at 2026-06-08T17:41:34Z on the same branch (run IDs: 27155901522, 27155901398)
  • Q fired twice at 2026-06-08T17:41:33Z (run IDs: 27155900025, 27155900013)
  • Q fired twice again at 2026-06-08T17:41:34Z (run IDs: 27155901716, 27155901417)
  • 38 out of 50 total workflow runs were part of simultaneous same-second fan-out events
  • formal-spec-awf-config-sources-spec branch accumulated 21 total workflow runs in a single session

View all simultaneous fan-out events

Timestamp	Branch	Workflows triggered
2026-06-08T17:41:33Z	formal-spec-awf-config-sources-spec	Agentic Commands ×2, Q ×2, Addressing comment ×1
2026-06-08T17:41:34Z	formal-spec-awf-config-sources-spec	Agentic Commands ×2, Q ×2
2026-06-08T18:04:52Z	bump-mcp-gateway-to-v0325	Q, AI Moderator, Smoke CI, Content Moderation, Agentic Commands
2026-06-08T18:06:10Z	fix-cli-docker-build	Content Moderation, Q, AI Moderator, Agentic Commands, Smoke CI
2026-06-08T18:30:52Z	fix-cli-docker-build	CWI, CGO, Smoke CI, Doc Build - Deploy

Proposed Change

Add concurrency groups to the Agentic Commands and Q workflow YAML files to prevent duplicate simultaneous instances per branch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false  # or true depending on desired behavior

Also audit what event combination is causing the same workflow to trigger twice in the same second (e.g., both push and pull_request events firing on the same commit).

Expected Impact

• Eliminate redundant duplicate agent sessions that do identical work in parallel
• Reduce total workflow run count by an estimated 15–30% per active branch
• Prevent race conditions between parallel instances writing to the same branch

Notes

• Distinct root cause category: event-trigger deduplication / concurrency configuration
• Data quality: only 1 day of session data available (50 runs); pattern may be more pervasive over the full 14-day window
• No events.jsonl files were found in session logs; analysis is based on sessions-list.json metadata only

Generated by ⚡ Copilot Opt · ⌖ 44.3 AIC · ⊞ 19.7K · ◷

[github-actions]

This issue is being closed as outdated. A newer issue has been created: #37902

View newer issue

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