[aw-failures] Smoke Copilot Sub Agents: 'evals' artifact not found — full run failure

[github-actions]

Problem

Fix the missing evals artifact hand-off in Smoke Copilot Sub Agents — the run fails outright when a downstream step tries to download an artifact named evals that was never produced.

Affected workflow and run

• Workflow: Smoke Copilot Sub Agents
• Failed run: §31967035750 (2026-08-16 19:15 UTC), duration 7.0m, engine: GitHub Copilot CLI
• Baseline (last success, same cohort): §31903396868 (2026-08-15 19:15 UTC)
• First observed instance this window (isolated so far — no other agentic-workflows issue currently names this workflow or this artifact).

Probable root cause

##[error]Unable to download artifact(s): Artifact not found for name: evals — a downstream job/step expects an artifact named evals that the producing step never uploaded (or uploaded under a mismatched name). This is the same failure shape already tracked for Daily Evals Feature Report's artifact hand-off in #53130. audit flags this run's plan/tool_call/tool_result event templates as anomalous ("new template discovered; rare cluster"), pointing at a code-path change rather than a one-off blip. The agent job itself ran clean — read-only posture, 8 allowed/0 blocked network requests, 1 turn completed successfully — so the fault is purely in the inter-job artifact hand-off, not agent execution.

Proposed remediation

1. Confirm which job/step is expected to produce the evals artifact and verify its upload-artifact name matches exactly what the downstream download-artifact step requests.
2. If the producing step can be legitimately skipped, make the downstream download step tolerant of a missing artifact instead of hard-failing the whole run.
3. Add a regression check that this workflow's artifact names stay in sync across jobs.

Success criteria / verification

• Next scheduled run of Smoke Copilot Sub Agents completes without the artifact-not-found error.
• If the artifact is legitimately optional, the workflow no longer fails when it's absent.
  Related to [aw-failures] [aw] Failure Investigator Report — 2026-08-16 13:00 UTC (6h) #53129

Generated by 🔍 [aw] Failure Investigator (6h) · agent · 237.9 AIC · ⌖ 8.49 AIC · ⊞ 5.6K · ◷

• expires on Aug 23, 2026, 5:32 PM UTC-08:00

[github-actions]

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🍪 Om nom nom by Issue Monster · gpt54 · 2.07 AIC · ⌖ 6.09 AIC · ⊞ 7.1K · ◷