[deep-report] [P0] Fix codex MCP-helper binary path fleet-wide — escalated from single-workflow chronic issue to 10-workflow total outage #54393

Description: The 2026-08-20 Agentic Workflow Audit (discussion #54358) found a fleet-wide Codex-engine outage: 18/18 Codex runs failed in the 24h window (0% success), spanning 10 workflows (Daily Cache Strategy Analyzer, AI Moderator, Daily Fact, Changeset Generator, Smoke Codex, Daily Compiler Threat Spec Optimizer, Daily AW Cross-Repo Compile Check, Daily Firewall Logs Collector and Reporter, Weekly Workflow Analysis, Copilot Session Insights). Every run fails 0-turn at "Execute Codex CLI" with null token/AIC, matching the codex-gh-aw-binary-not-found-for-mcp signature that recurred 6 times. The Detection Analysis Report (#54377, independently generated the same day) corroborates this: AI Moderator shows 0% success over 5 runs on the codex engine, consistent with the same outage. The audit notes this exact class of fix was proposed 2026-06-15 and applied narrowly to just one workflow — issue #41253 ("Fix codex gh-aw binary path for Daily Cache Strategy Analyzer") was closed 2026-06-24 — but was never generalized fleet-wide. The MCP-helper/awf binary path resolution for the Codex engine needs to be fixed at the engine-config level (pkg/workflow/codex_engine.go or equivalent), not per-workflow, so all Codex-engine workflows resolve the binary correctly. Note: PR #54298 (open, unmerged) adds diagnostic log-tailing for Codex CLI failures but does not fix this specific binary-path root cause — it's a complementary, separate change.

Expected Impact: Restores 100% of Codex-engine workflow coverage (currently 0%), including AI Moderator's moderation coverage which has had zero effective coverage for 24h+.

Suggested Agent: New Agent (compiler/engine fix, not a reporting agent)

Estimated Effort: Medium (1-4 hours) — likely a generalization of the fix already applied once in #41253/PR history

Data Source: DeepReport analysis of Agentic Workflow Audit (#54358) and Detection Analysis Report (#54377), 2026-08-20 cycle

Generated by 🔬 Deep Report · agent · 165.2 AIC · ⌖ 20.3 AIC · ⊞ 11.9K · ◷

• expires on Aug 22, 2026, 4:39 PM UTC-08:00