[aw-failures] [aw-fix] Module-load SyntaxError in parse_mcp_gateway_log.cjs — PR #43170 added `await` inside non-async writeStep [Content truncated due to length]

[github-actions]

Fix PR #43170 now — it hard-reds every agentic workflow at module load.

Recommendation: Revert or correct the await added to parse_mcp_gateway_log.cjs in PR #43170; it sits inside a non-async function and throws SyntaxError before any workflow logic runs. This is the single dominant P0 across the last 6h.

Executive summary

PR #43170 (feat(eslint): add require-await-core-summary-write rule, copilot-swe-agent, OPEN/blocked, not merged) added await coreObj.summary.write(); at actions/setup/js/parse_mcp_gateway_log.cjs:236 — a call site inside the non-async helper writeStepSummaryWithTokenUsage(coreObj) (declared at line 204). Top-level-style await in a non-async function is a hard SyntaxError at require() time, so the module fails to load. Every workflow's "Parse MCP Gateway logs for step summary" step and the conclusion job's "Handle agent failure" step require this module, so both crash — across both claude and copilot engines. Main branch is unaffected (0 compiled lock files carry the bad await); the blast radius is confined to PR #43170's merge ref.

Failure clusters

Cluster	Sev	Signature	Workflows (run IDs)	Tracking
A	P0	SyntaxError: await is only valid in async functions @ parse_mcp_gateway_log.cjs:236 (non-async writeStepSummaryWithTokenUsage)	Design Decision Gate (§28661680853), Test Quality Sentinel (§28661680942), Impeccable Skills Reviewer (§28661680859), PR Code Quality Reviewer (§28661680929)	NONE → this issue
B	P1	EACCES: permission denied, mkdir '/tmp/gh-aw/sandbox/firewall/logs'	Smoke CI (§28661781846)	Already tracked by #42398

Evidence — Cluster A crash trace (representative run 28661680853)

/home/runner/work/_temp/gh-aw/actions/parse_mcp_gateway_log.cjs:236
  await coreObj.summary.write();
  ^^^^^
SyntaxError: await is only valid in async functions and the top level bodies of modules
    at wrapSafe (node:internal/modules/cjs/loader:1787:18)
    at Module._compile ...
    at Object.<anonymous> (/home/runner/work/_temp/gh-aw/actions/handle_agent_failure.cjs:18:61)

• Same trace reproduced in all 4 runs above, in both the agent job (Parse MCP Gateway logs) and the conclusion job (Handle agent failure, which requires the module at line 18).
• Committed main source: writeStepSummaryWithTokenUsage (line 204) is not async; line 236 is coreObj.summary.write(); without await. async function main() is a separate function (line 814). PR feat(eslint): add require-await-core-summary-write rule #43170 added the await to the non-async helper.
• Irony: PR feat(eslint): add require-await-core-summary-write rule #43170's own description states its ESLint autofix is "only offered when inside an async function (applying it outside would produce a syntax error)." The manual "existing violations fixed" edit bypassed that guard and did exactly that.

Existing-issue correlation

• Cluster B is already tracked by [aw-failures] Smoke CI hard-red at startup — EACCES mkdir /tmp/gh-aw/sandbox/firewall/logs, agent never invoked (rootless left [Content truncated due to length] #42398 (Smoke CI hard-red ... EACCES mkdir /tmp/gh-aw/sandbox/firewall/logs) — still reproducing today (§28661781846), left open, not a new gap.
• No open agentic-workflows issue covers Cluster A. Reviewed BYOK/model-policy issues ([aw-failures] [aw-fix] Copilot SDK BYOK: strip OpenAI-only stream_options for type=anthropic providers (HTTP 400 kills agent runs) #43032, [aw-failures] Copilot BYOK 100% red — SDK driver sends OpenAI stream_options to type=anthropic provider, upstream 400 kills [Content truncated due to length] #43031, [aw-failures] Smoke Copilot Sub Agents 100% red — Copilot SDK returns "No model available (policy enablement)" for gpt-5.3-codex [Content truncated due to length] #42824, [aw-failures] Daily BYOK Ollama Test 100% red for 8+ days — offline+BYOK api-proxy returns 503 on /v1/models, Copilot CLI gets H [Content truncated due to length] #41827, [aw-failures] Daily Cache Strategy Analyzer ~50% red — Codex pinned to alpha snapshot gpt-5-codex-alpha-2025-11-07 that 404s on [Content truncated due to length] #41787) and MCP/firewall issues ([aw-failures] GitHub MCP Structural Analysis false-red — github MCP "failed to launch" after run completes; firewall denies awmg [Content truncated due to length] #41711, [aw-failures] GitHub Remote MCP Auth Test 100% red — gateway config emits invalid JSON (\(redacted) bad escape), gateway exits [Content truncated due to length] #41862, [aw-failures] Claude false-red — log_parser_bootstrap fails completed runs on empty logEntries (Avenger, Daily Rendering Scripts [Content truncated due to length] #41885) — none match the SyntaxError signature.
• No issues closed this run: no fresh evidence any tracked issue is fixed.

Fix roadmap

• P0 — Cluster A: correct PR feat(eslint): add require-await-core-summary-write rule #43170. Two viable fixes (see sub-issue): make writeStepSummaryWithTokenUsage async and await it at its single call site, or drop the erroneous await. Additionally harden the new ESLint autofix so it never inserts await outside an async scope, and add a build gate that require()s each generated .cjs to catch module-load SyntaxErrors in CI.
• P1 — Cluster B: no action here; continue under [aw-failures] Smoke CI hard-red at startup — EACCES mkdir /tmp/gh-aw/sandbox/firewall/logs, agent never invoked (rootless left [Content truncated due to length] #42398.

Sub-issues created

• Concrete fix task linked below.

Unclustered failed run IDs (payload lacked detailed logs)

28661680861, 28661669474, 28658894614, 28655406842, 28655368469, 28652123698, 28649777787, 28649473366 — timing overlaps PR #43170's run batch; likely same Cluster A signature but not individually verified in this pass.

References:

• https://github.com/github/gh-aw/actions/runs/28661680853
• https://github.com/github/gh-aw/actions/runs/28661680942
• https://github.com/github/gh-aw/actions/runs/28661680859

Generated by 🔍 [aw] Failure Investigator (6h) · 155.9 AIC · ⌖ 40.9 AIC · ⊞ 5.2K · ◷

• expires on Jul 10, 2026, 5:31 AM UTC-08:00