`/exit code line anywhere in the 50-line tail.\n\nRun 32089118620 (same workflow, ~3.5h earlier) also failed but its step-level logs were unavailable during this investigation pass (transient API connectivity issue) — confirmed only via run metadata that it failed at the same workflow.\n</details>\n\n### Probable root cause\n\nTimeout/hang signature, not a clean failure: the CLI process appears to be killed while blocked on a large-diff `Read`, and nothing in the workflow surfaces that as a distinguishable error — the log just goes silent.\n\n### Proposed remediation\n\n1. Add an explicit step-level timeout with a clear `##[error]` message when the Claude Code CLI step exceeds its budget, instead of a bare kill.\n2. Cap or paginate the diff size handed to the agent — large `Read` calls on `pr.diff` are the apparent hang point in both failures.\n3. Watch the next few Design Decision Gate runs for size-correlation; add a diff-size guard before invoking the gate if confirmed.\n\n### Success criteria\n\nDesign Decision Gate runs complete (pass or fail) without silent mid-tool-use termination; timeouts show an explicit error in logs; similarly-sized PR diffs no longer trigger the hang.\n\n**Parent:** #53129\nRelated to #53129\n\n\n<!-- gh-aw-tracker-id: aw-failure-investigator -->\n\n> Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32109525808) · agent · 251.3 AIC · ⌖ 6.96 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22&type=issues)\n> - [x] expires <!-- gh-aw-expires: 2026-08-25T07:21:01.618Z --> on Aug 24, 2026, 11:21 PM UTC-08:00\n\n<!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32109525808, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32109525808 -->\n\n<!-- gh-aw-workflow-id: aw-failure-investigator -->\n<!-- gh-aw-workflow-call-id: github/gh-aw/aw-failure-investigator -->\n\n---\n\n### Correction — this is not a silent hang, it's a 429 invocation-cap failure. Keep this open.\n\n**One-sentence rationale:** Design Decision Gate's run today fails fast and loud with `Maximum LLM invocations exceeded (30 / 30)`, a non-retryable rate-limit guard — not the silent hang this issue currently describes.\n\n**Fresh occurrence (2026-08-20):** Design Decision Gate — [§32394421229](https://github.com/github/gh-aw/actions/runs/32394421229). Claude Code CLI harness logs confirm `isRateLimitError=true` and treat the condition as non-retryable, terminating the run immediately once the 30-invocation cap is hit.\n\n**Why this stays open:** no commit since this issue opened has touched this workflow's `.md`/`.lock.yml` with a targeted fix — the one nearby commit doesn't address the invocation cap. Not closing per the tool-denial-limit rule.\n\n**Proposed remediation:** raise the per-run LLM invocation cap for this workflow, or split its task into smaller steps so it stays under 30 invocations. Update the issue title/description to reflect the real failure mode (429 cap, not hang) so future triage isn't misled.> Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32406250112) · agent · 238.8 AIC · ⌖ 7.28 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22&type=issues)\n\n<!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32406250112, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32406250112 -->\n\n---\n\n### Update (2026-08-22) — reproduced again today, keep this open\n\nDesign Decision Gate failed at the \"Execute Claude Code CLI\" step again: [§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031) (2026-08-22 03:15 UTC). Given the pr

Critical vulnerabilities detected in container images` — gate working as designed, not a bug |\n| 2 | P2 | Issue Arborist | [§32553765299](https://github.com/github/gh-aw/actions/runs/32553765299) | Execute Codex CLI failed; captured tail is only the safeoutputs MCP handshake — root cause not captured |\n| 3 | P2 | Code Simplifier | [§32548891852](https://github.com/github/gh-aw/actions/runs/32548891852) | Execute GitHub Copilot CLI failed; same handshake-only capture, no error line |\n| 4 | P1 | Design Decision Gate 🏗️ | [§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031) | Claude Code CLI step hang — matches existing [#53619](https://github.com/github/gh-aw/issues/53619), still recurring today |\n| 5 | **P0** | Smoke Codex | [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) | `serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed` |\n\n### Evidence\n\nCluster 5 dominant error, straight from the job log:\n```\nraise LanguageServerManagerInitialisationError(f\"Failed to start {len(exceptions)} language server(s):\\n{failure_messages}\")\nserena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s):\ngo: Go is not installed. Please install Go from https://golang.org/doc/install and make sure it is added to your PATH.\n```\nFailure class: **infra** — the Serena MCP server container is missing the Go toolchain it needs to spin up `gopls` for Go-configured projects.\n\n`audit-diff` between [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) and the prior Smoke Codex failure [§32336198768](https://github.com/github/gh-aw/actions/runs/32336198768) shows **zero firewall/domain drift** and no anomalies — rules out network/egress as the cause and confirms this is a static container-image defect, not a transient blip.\n\n<details>\n<summary>Blast radius: workflows importing shared/mcp/serena-go.md</summary>\n\narchie, cloclo, daily-function-namer, developer-docs-consolidator, glossary-maintainer, linter-miner, mcp-inspector, purelock, repository-quality-improver, sergo, smoke-codex, smoke-copilot-aoai-apikey, smoke-copilot-aoai-entra, smoke-copilot-arm, smoke-copilot, terminal-stylist, typist\n\n</details>\n\n### Existing issue correlation\n\n| Cluster | Matched issue | Confidence |\n|---|---|---|\n| 4 (Design Decision Gate) | [#53619](https://github.com/github/gh-aw/issues/53619) | high — still open, still reproducing today |\n| 5 (Serena Go crash) | none | — new gap, this issue |\n| 1, 2, 3 | none | P2, insufficient log capture to file a concrete fix yet |\n\n[#53191](https://github.com/github/gh-aw/issues/53191) was checked as a possible match for cluster 5 and ruled out — it covers a `serena` MCP **Gateway config schema** rejection of digest-pinned images, not a missing Go binary inside the container. Different root cause, different fix.\n\n### Fix roadmap\n\n- **P0:** Bundle Go + `gopls` into the `ghcr.io/oraios/serena:latest` image, or add a Go install step to `shared/mcp/serena-go.md` before `activate_project` is called. See sub-issue below.\n- **P1:** [#53619](https://github.com/github/gh-aw/issues/53619) — Design Decision Gate Claude Code CLI hang reproduced again today ([§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031)); update that issue with the fresh run, don't reopen work here.\n- **P2:** Widen truncated-log capture for Issue Arborist / Code Simplifier — current capture stops at the MCP tool-schema handshake and never reaches the real Codex/Copilot CLI error, blocking root-cause work on clusters 2 and 3.\n\n### Sub-issues created\n\n- Serena Go toolchain fix (linked below)\n","labels":["bug","automation","agentic-workflows"],"temporary_id":"#aw_serego1","title":"[P0] Serena Go language server crashes on missing Go toolchain — breaks 17 shared/mcp/serena-go.md workflows"}}}

`/exit code line anywhere in the 50-line tail.\n\nRun 32089118620 (same workflow, ~3.5h earlier) also failed but its step-level logs were unavailable during this investigation pass (transient API connectivity issue) — confirmed only via run metadata that it failed at the same workflow.\n\u003c/details\u003e\n\n### Probable root cause\n\nTimeout/hang signature, not a clean failure: the CLI process appears to be killed while blocked on a large-diff `Read`, and nothing in the workflow surfaces that as a distinguishable error — the log just goes silent.\n\n### Proposed remediation\n\n1. Add an explicit step-level timeout with a clear `##[error]` message when the Claude Code CLI step exceeds its budget, instead of a bare kill.\n2. Cap or paginate the diff size handed to the agent — large `Read` calls on `pr.diff` are the apparent hang point in both failures.\n3. Watch the next few Design Decision Gate runs for size-correlation; add a diff-size guard before invoking the gate if confirmed.\n\n### Success criteria\n\nDesign Decision Gate runs complete (pass or fail) without silent mid-tool-use termination; timeouts show an explicit error in logs; similarly-sized PR diffs no longer trigger the hang.\n\n**Parent:** #53129\nRelated to #53129\n\n\n\u003c!-- gh-aw-tracker-id: aw-failure-investigator --\u003e\n\n\u003e Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32109525808) · agent · 251.3 AIC · ⌖ 6.96 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22\u0026type=issues)\n\u003e - [x] expires \u003c!-- gh-aw-expires: 2026-08-25T07:21:01.618Z --\u003e on Aug 24, 2026, 11:21 PM UTC-08:00\n\n\u003c!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32109525808, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32109525808 --\u003e\n\n\u003c!-- gh-aw-workflow-id: aw-failure-investigator --\u003e\n\u003c!-- gh-aw-workflow-call-id: github/gh-aw/aw-failure-investigator --\u003e\n\n---\n\n### Correction — this is not a silent hang, it's a 429 invocation-cap failure. Keep this open.\n\n**One-sentence rationale:** Design Decision Gate's run today fails fast and loud with `Maximum LLM invocations exceeded (30 / 30)`, a non-retryable rate-limit guard — not the silent hang this issue currently describes.\n\n**Fresh occurrence (2026-08-20):** Design Decision Gate — [§32394421229](https://github.com/github/gh-aw/actions/runs/32394421229). Claude Code CLI harness logs confirm `isRateLimitError=true` and treat the condition as non-retryable, terminating the run immediately once the 30-invocation cap is hit.\n\n**Why this stays open:** no commit since this issue opened has touched this workflow's `.md`/`.lock.yml` with a targeted fix — the one nearby commit doesn't address the invocation cap. Not closing per the tool-denial-limit rule.\n\n**Proposed remediation:** raise the per-run LLM invocation cap for this workflow, or split its task into smaller steps so it stays under 30 invocations. Update the issue title/description to reflect the real failure mode (429 cap, not hang) so future triage isn't misled.\u003e Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32406250112) · agent · 238.8 AIC · ⌖ 7.28 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22\u0026type=issues)\n\n\u003c!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32406250112, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32406250112 --\u003e\n\n---\n\n### Update (2026-08-22) — reproduced again today, keep this open\n\nDesign Decision Gate failed at the \"Execute Claude Code CLI\" step again: [§32548469031]

Critical vulnerabilities detected in container images` — gate working as designed, not a bug |\n| 2 | P2 | Issue Arborist | [§32553765299](https://github.com/github/gh-aw/actions/runs/32553765299) | Execute Codex CLI failed; captured tail is only the safeoutputs MCP handshake — root cause not captured |\n| 3 | P2 | Code Simplifier | [§32548891852](https://github.com/github/gh-aw/actions/runs/32548891852) | Execute GitHub Copilot CLI failed; same handshake-only capture, no error line |\n| 4 | P1 | Design Decision Gate 🏗️ | [§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031) | Claude Code CLI step hang — matches existing [#53619](https://github.com/github/gh-aw/issues/53619), still recurring today |\n| 5 | **P0** | Smoke Codex | [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) | `serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed` |\n\n### Evidence\n\nCluster 5 dominant error, straight from the job log:\n```\nraise LanguageServerManagerInitialisationError(f\"Failed to start {len(exceptions)} language server(s):\\n{failure_messages}\")\nserena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s):\ngo: Go is not installed. Please install Go from https://golang.org/doc/install and make sure it is added to your PATH.\n```\nFailure class: **infra** — the Serena MCP server container is missing the Go toolchain it needs to spin up `gopls` for Go-configured projects.\n\n`audit-diff` between [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) and the prior Smoke Codex failure [§32336198768](https://github.com/github/gh-aw/actions/runs/32336198768) shows **zero firewall/domain drift** and no anomalies — rules out network/egress as the cause and confirms this is a static container-image defect, not a transient blip.\n\n\u003cdetails\u003e\n\u003csummary\u003eBlast radius: workflows importing shared/mcp/serena-go.md\u003c/summary\u003e\n\narchie, cloclo, daily-function-namer, developer-docs-consolidator, glossary-maintainer, linter-miner, mcp-inspector, purelock, repository-quality-improver, sergo, smoke-codex, smoke-copilot-aoai-apikey, smoke-copilot-aoai-entra, smoke-copilot-arm, smoke-copilot, terminal-stylist, typist\n\n\u003c/details\u003e\n\n### Existing issue correlation\n\n| Cluster | Matched issue | Confidence |\n|---|---|---|\n| 4 (Design Decision Gate) | [#53619](https://github.com/github/gh-aw/issues/53619) | high — still open, still reproducing today |\n| 5 (Serena Go crash) | none | — new gap, this issue |\n| 1, 2, 3 | none | P2, insufficient log capture to file a concrete fix yet |\n\n[#53191](https://github.com/github/gh-aw/issues/53191) was checked as a possible match for cluster 5 and ruled out — it covers a `serena` MCP **Gateway config schema** rejection of digest-pinned images, not a missing Go binary inside the container. Different root cause, different fix.\n\n### Fix roadmap\n\n- **P0:** Bundle Go + `gopls` into the `ghcr.io/oraios/serena:latest` image, or add a Go install step to `shared/mcp/serena-go.md` before `activate_project` is called. See sub-issue below.\n- **P1:** [#53619](https://github.com/github/gh-aw/issues/53619) — Design Decision Gate Claude Code CLI hang reproduced again today ([§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031)); update that issue with the fresh run, don't reopen work here.\n- **P2:** Widen truncated-log capture for Issue Arborist / Code Simplifier — current capture stops at the MCP tool-schema handshake and never reaches the real Codex/Copilot CLI error, blocking root-cause work on clusters 2 and 3.\n\n### Sub-issues created\n\n- Serena Go toolchain fix (linked below)\n","labels":["bug","automation","agentic-workflows"],"temporary_id":"#aw_serego1","title":"[P0] Serena Go language server crashes on missing Go toolchain — breaks 17 shared/mcp/serena-go.md workflows"},"name":"create_issue"}}}

Process completed with exit code 35.\n...\n/home/runner/work/_temp/....sh: line 43: awf: command not found\n##[error]Process completed with exit code 127.\n```\n\nCascade: `Install AWF binary` fails → later evals steps are skipped, including `Upload evals results` → the downstream `conclusion` job then fails with `Unable to download artifact(s): Artifact not found for name: evals`, which is what the CI status surfaces as the \"real\" error even though the true cause is upstream.\n\u003c/details\u003e\n\n**Probable root cause:** `install_awf_binary.sh` has no retry/backoff around the `curl` download of `checksums.txt` from GitHub Releases, so a single transient TLS reset takes down the whole evals job and only surfaces downstream as a confusing artifact-not-found error.\n\n**Proposed remediation:** add `curl --retry 3 --retry-delay 2 --retry-connrefused` (or equivalent) to the checksum/binary download in `install_awf_binary.sh`. Also make the downstream artifact-download step tolerate a missing `evals` artifact with a clear \"evals skipped upstream\" message instead of a raw `Unable to download artifact(s)` error.\n\n**Success criteria:** the install step retries through a transient network blip instead of failing the whole job; if retries are exhausted, the top-level failure names the real cause (network) instead of only showing a missing-artifact error three jobs downstream.\n\n---\n\n### Fix the MCP Gateway config (schema or generator) to accept digest-pinned container images — `serena`'s `@sha256:...` reference fails validation and blocks the whole run.\n\nPackage Specification Librarian failed at `Start MCP Gateway` in [§31949448689](https://github.com/github/gh-aw/actions/runs/31949448689) (2026-08-16 13:23 UTC), before the agent ever ran.\n\n\u003cdetails\u003e\n\u003csummary\u003eRaw failure evidence\u003c/summary\u003e\n\n```\nConfiguration validation error (MCP Gateway version: v0.4.9):\nError: jsonschema validation failed with '.../mcp-gateway-config.schema.json#'\n Error: 'oneOf' failed, none matched\n Error: 'ghcr.io/oraios/serena:latest@sha256:[REDACTED]' does not match pattern '^[a-zA-Z0-9][a-zA-Z0-9./_-]*(:([a-zA-Z0-9._-]+|latest))?$'\n Error: missing property 'url'\n Error: value must be 'http'\n Error: additional properties 'entrypointArgs', 'mounts', 'args', 'container', 'entrypoint' not allowed\nERROR: Gateway failed to become ready\n```\n\u003c/details\u003e\n\n**Probable root cause:** the committed lock file's `\"serena\"` MCP server config uses a plain tag (`ghcr.io/oraios/serena:latest`), but at runtime the gateway config is resolved/re-pinned to include a `@sha256:...` digest suffix — and the schema's container-image regex pattern rejects any `@sha256:` suffix, only bare tags pass. This is a **shared-component bug**: both Linter Miner and Package Specification Librarian import the same `shared/mcp/serena.md`, so every workflow using this shared Serena MCP config is at risk of hitting the same schema rejection.\n\n**Proposed remediation:** either (a) loosen `mcp-gateway-config.schema.json`'s container-image pattern to accept `@sha256:\u003c64-hex\u003e` digest suffixes, or (b) stop injecting a resolved digest into the `container` field for stdio-type MCP servers at gateway-config-build time, keeping the plain tag the lock file already specifies.\n\n**Success criteria:** Package Specification Librarian (and any other workflow importing `shared/mcp/serena.md`) starts the MCP Gateway with `serena` registered successfully, with no `jsonschema validation failed` error, across the next 3 scheduled runs.\n\n**References:**\n- [§31957063541](https://github.com/github/gh-aw/actions/runs/31957063541)\n- [§31949448689](https://github.com/github/gh-aw/actions/runs/31949448689)\nRelated to #53129\n\n\n\u003c!-- gh-aw-tracker-id: aw-failure-investigator --\u003e\n\n\u003e Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/31965944876) · agent · 210.1 AIC · ⌖ 7 AIC · ⊞ 5.6K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3A

Critical vulnerabilities detected in container images; Process completed with exit code 1 (gate step 'Enforce critical vulnerability and license gates')\"},{\"id\":\"cluster-2\",\"severity\":\"P2\",\"representative_run_id\":32553765299,\"workflows\":[\"Issue Arborist\"],\"error_signature\":\"Execute Codex CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-3\",\"severity\":\"P2\",\"representative_run_id\":32548891852,\"workflows\":[\"Code Simplifier\"],\"error_signature\":\"Execute GitHub Copilot CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-4\",\"severity\":\"P2\",\"representative_run_id\":32548469031,\"workflows\":[\"Design Decision Gate 🏗️\"],\"error_signature\":\"Execute Claude Code CLI step failed; captured tail cuts off at the awf container/claude_harness invocation command itself, no error output captured (weak/insufficient evidence, likely truncated before real fault)\"},{\"id\":\"cluster-5\",\"severity\":\"P0\",\"representative_run_id\":32547658432,\"workflows\":[\"Smoke Codex\"],\"error_signature\":\"serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed (MCP backend startup_failure during Execute Codex CLI)\"}]}\n```\n\nFor `existing_tracking_issues`, read the top-level `existing_tracking_issues` array from /tmp/gh-aw/agent/failure-investigator/prefetch.json (17 entries; some titles are truncated in that file — if a title says \"[Content truncated due to length]\" and you need the full text to judge a match, use `gh issue view <number> --repo github/gh-aw --json title,body` to fetch it, but only do this for issues that look like plausible candidates for cluster-5 or other P0/P1 clusters).\n\nOutput ONLY the JSON object per the schema above, nothing else.","agentId":"a8bfccecac31365fb","agentType":"general-purpose","content":[{"type":"text","text":"```json\n{\"matched\":[{\"cluster_id\":\"cluster-4\",\"issue_number\":53619,\"confidence\":\"high\"}],\"gaps\":[{\"cluster_id\":\"cluster-1\",\"reason\":\"no existing issue covers Daily Container Image Security Scan vulnerability/license gate failures\"},{\"cluster_id\":\"cluster-2\",\"reason\":\"no existing issue matches Issue Arborist Codex CLI failure with only safeoutputs MCP handshake captured; closest issue (#54242) is a different workflow (AI Moderator) with a distinct signature (clean firewall, explicit exit code 1)\"},{\"cluster_id\":\"cluster-3\",\"reason\":\"no existing issue covers Code Simplifier Copilot CLI failures with only safeoutputs MCP handshake captured and no explicit error line\"},{\"cluster_id\":\"cluster-5\",\"reason\":\"no existing issue covers the serena MCP backend startup_failure due to missing Go installation on Smoke Codex; closest candidate (#53191) covers a different serena issue (digest-pinned image schema validation, not missing Go)\"}]}\n```"}],"resolvedModel":"claude-sonnet-5","totalDurationMs":50585,"totalTokens":59680,"totalToolUseCount":6,"usage":{"input_tokens":42,"cache_creation_input_tokens":297,"cache_read_input_tokens":57372,"output_tokens":1969,"output_tokens_details":{"thinking_tokens":1596},"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":297},"inference_geo":"global","iterations":[],"speed":"standard"},"toolStats":{"readCount":3,"searchCount":1,"bashCount":2,"editFileCount":0,"linesAdded":0,"linesRemoved":0,"otherToolCount":0}}}

Process completed with exit code 35.\\n...\\n/home/runner/work/_temp/....sh: line 43: awf: command not found\\n##[error]Process completed with exit code 127.\\n```\\n\\nCascade: `Install AWF binary` fails → later evals steps are skipped, including `Upload evals results` → the downstream `conclusion` job then fails with `Unable to download artifact(s): Artifact not found for name: evals`, which is what the CI status surfaces as the \\\"real\\\" error even though the true cause is upstream.\\n</details>\\n\\n**Probable root cause:** `install_awf_binary.sh` has no retry/backoff around the `curl` download of `checksums.txt` from GitHub Releases, so a single transient TLS reset takes down the whole evals job and only surfaces downstream as a confusing artifact-not-found error.\\n\\n**Proposed remediation:** add `curl --retry 3 --retry-delay 2 --retry-connrefused` (or equivalent) to the checksum/binary download in `install_awf_binary.sh`. Also make the downstream artifact-download step tolerate a missing `evals` artifact with a clear \\\"evals skipped upstream\\\" message instead of a raw `Unable to download artifact(s)` error.\\n\\n**Success criteria:** the install step retries through a transient network blip instead of failing the whole job; if retries are exhausted, the top-level failure names the real cause (network) instead of only showing a missing-artifact error three jobs downstream.\\n\\n---\\n\\n### Fix the MCP Gateway config (schema or generator) to accept digest-pinned container images — `serena`'s `@sha256:...` reference fails validation and blocks the whole run.\\n\\nPackage Specification Librarian failed at `Start MCP Gateway` in [§31949448689](https://github.com/github/gh-aw/actions/runs/31949448689) (2026-08-16 13:23 UTC), before the agent ever ran.\\n\\n<details>\\n<summary>Raw failure evidence</summary>\\n\\n```\\nConfiguration validation error (MCP Gateway version: v0.4.9):\\nError: jsonschema validation failed with '.../mcp-gateway-config.schema.json#'\\n Error: 'oneOf' failed, none matched\\n Error: 'ghcr.io/oraios/serena:latest@sha256:[REDACTED]' does not match pattern '^[a-zA-Z0-9][a-zA-Z0-9./_-]*(:([a-zA-Z0-9._-]+|latest))?$'\\n Error: missing property 'url'\\n Error: value must be 'http'\\n Error: additional properties 'entrypointArgs', 'mounts', 'args', 'container', 'entrypoint' not allowed\\nER","is_error":false}]},"parent_tool_use_id":"toolu_01MxD9JiYnpiYeoBHV3KB2jx","session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708","uuid":"36964c22-e175-4994-96b3-4df1fcf39eb5","timestamp":"2026-08-22T07:06:38.007Z","subagent_type":"general-purpose","task_description":"Match clusters to existing issues"}

Critical vulnerabilities detected in container images; Process completed with exit code 1 (gate step 'Enforce critical vulnerability and license gates')\"},{\"id\":\"cluster-2\",\"severity\":\"P2\",\"representative_run_id\":32553765299,\"workflows\":[\"Issue Arborist\"],\"error_signature\":\"Execute Codex CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-3\",\"severity\":\"P2\",\"representative_run_id\":32548891852,\"workflows\":[\"Code Simplifier\"],\"error_signature\":\"Execute GitHub Copilot CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-4\",\"severity\":\"P2\",\"representative_run_id\":32548469031,\"workflows\":[\"Design Decision Gate 🏗️\"],\"error_signature\":\"Execute Claude Code CLI step failed; captured tail cuts off at the awf container/claude_harness invocation command itself, no error output captured (weak/insufficient evidence, likely truncated before real fault)\"},{\"id\":\"cluster-5\",\"severity\":\"P0\",\"representative_run_id\":32547658432,\"workflows\":[\"Smoke Codex\"],\"error_signature\":\"serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed (MCP backend startup_failure during Execute Codex CLI)\"}]}\n```\n\nFor `existing_tracking_issues`, read the top-level `existing_tracking_issues` array from /tmp/gh-aw/agent/failure-investigator/prefetch.json (17 entries; some titles are truncated in that file — if a title says \"[Content truncated due to length]\" and you need the full text to judge a match, use `gh issue view <number> --repo github/gh-aw --json title,body` to fetch it, but only do this for issues that look like plausible candidates for cluster-5 or other P0/P1 clusters).\n\nOutput ONLY the JSON object per the schema above, nothing else."}]},"parent_tool_use_id":"toolu_01MxD9JiYnpiYeoBHV3KB2jx","session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708","uuid":"152f4bec-8d60-4107-a32e-97f34833f5da","timestamp":"2026-08-22T07:06:12.082Z","subagent_type":"general-purpose","task_description":"Match clusters to existing issues"}

Critical vulnerabilities detected in container images; Process completed with exit code 1 (gate step 'Enforce critical vulnerability and license gates')\"},{\"id\":\"cluster-2\",\"severity\":\"P2\",\"representative_run_id\":32553765299,\"workflows\":[\"Issue Arborist\"],\"error_signature\":\"Execute Codex CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-3\",\"severity\":\"P2\",\"representative_run_id\":32548891852,\"workflows\":[\"Code Simplifier\"],\"error_signature\":\"Execute GitHub Copilot CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-4\",\"severity\":\"P2\",\"representative_run_id\":32548469031,\"workflows\":[\"Design Decision Gate 🏗️\"],\"error_signature\":\"Execute Claude Code CLI step failed; captured tail cuts off at the awf container/claude_harness invocation command itself, no error output captured (weak/insufficient evidence, likely truncated before real fault)\"},{\"id\":\"cluster-5\",\"severity\":\"P0\",\"representative_run_id\":32547658432,\"workflows\":[\"Smoke Codex\"],\"error_signature\":\"serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed (MCP backend startup_failure during Execute Codex CLI)\"}]}\n```\n\nFor `existing_tracking_issues`, read the top-level `existing_tracking_issues` array from /tmp/gh-aw/agent/failure-investigator/prefetch.json (17 entries; some titles are truncated in that file — if a title says \"[Content truncated due to length]\" and you need the full text to judge a match, use `gh issue view <number> --repo github/gh-aw --json title,body` to fetch it, but only do this for issues that look like plausible candidates for cluster-5 or other P0/P1 clusters).\n\nOutput ONLY the JSON object per the schema above, nothing else.","uuid":"17b24974-0ea4-4870-89c1-17a0741a0de1","session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708"}

Critical vulnerabilities detected in container images; Process completed with exit code 1 (gate step 'Enforce critical vulnerability and license gates')\"},{\"id\":\"cluster-2\",\"severity\":\"P2\",\"representative_run_id\":32553765299,\"workflows\":[\"Issue Arborist\"],\"error_signature\":\"Execute Codex CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-3\",\"severity\":\"P2\",\"representative_run_id\":32548891852,\"workflows\":[\"Code Simplifier\"],\"error_signature\":\"Execute GitHub Copilot CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\"},{\"id\":\"cluster-4\",\"severity\":\"P2\",\"representative_run_id\":32548469031,\"workflows\":[\"Design Decision Gate 🏗️\"],\"error_signature\":\"Execute Claude Code CLI step failed; captured tail cuts off at the awf container/claude_harness invocation command itself, no error output captured (weak/insufficient evidence, likely truncated before real fault)\"},{\"id\":\"cluster-5\",\"severity\":\"P0\",\"representative_run_id\":32547658432,\"workflows\":[\"Smoke Codex\"],\"error_signature\":\"serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed (MCP backend startup_failure during Execute Codex CLI)\"}]}\n```\n\nFor `existing_tracking_issues`, read the top-level `existing_tracking_issues` array from /tmp/gh-aw/agent/failure-investigator/prefetch.json (17 entries; some titles are truncated in that file — if a title says \"[Content truncated due to length]\" and you need the full text to judge a match, use `gh issue view <number> --repo github/gh-aw --json title,body` to fetch it, but only do this for issues that look like plausible candidates for cluster-5 or other P0/P1 clusters).\n\nOutput ONLY the JSON object per the schema above, nothing else.","run_in_background":false},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":42,"cache_creation_input_tokens":2517,"cache_read_input_tokens":87621,"cache_creation":{"ephemeral_5m_input_tokens":2517,"ephemeral_1h_input_tokens":0},"output_tokens":5,"service_tier":"standard","inference_geo":"global"},"context_management":null},"parent_tool_use_id":null,"session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708","uuid":"b98a9181-2a79-4a29-843c-06b368c28752","timestamp":"2026-08-22T07:06:12.079Z","request_id":"req_011CeHN1cZKCetAn7UvRfZtm"}

Critical vulnerabilities detected in container images; Process completed with exit code 1 (gate step 'Enforce critical vulnerability and license gates')\",\"run_ids\":[32554786176],\"truncated_error_logs\":[{\"job_id\":96987189859,\"job_name\":\"agent\",\"line_count\":50,\"tail_lines\":\"agent\\tEnforce critical vulnerability and license gates\\t2026-08-22T06:03:23.8015789Z ##[error]Critical vulnerabilities detected in container images.\\nagent\\tEnforce critical vulnerability and license gates\\t2026-08-22T06:03:23.8025233Z ##[error]Process completed with exit code 1.\",\"capture_likely_missed_fault\":false}]},{\"id\":\"cluster-2\",\"severity\":\"P2\",\"representative_run_id\":32553765299,\"comparator_run_id\":32554786176,\"workflows\":[\"Issue Arborist\"],\"error_signature\":\"Execute Codex CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\",\"run_ids\":[32553765299],\"truncated_error_logs\":[]},{\"id\":\"cluster-3\",\"severity\":\"P2\",\"representative_run_id\":32548891852,\"comparator_run_id\":32548469031,\"workflows\":[\"Code Simplifier\"],\"error_signature\":\"Execute GitHub Copilot CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\",\"run_ids\":[32548891852],\"truncated_error_logs\":[]},{\"id\":\"cluster-4\",\"severity\":\"P2\",\"representative_run_id\":32548469031,\"comparator_run_id\":32548891852,\"workflows\":[\"Design Decision Gate 🏗️\"],\"error_signature\":\"Execute Claude Code CLI step failed; captured tail cuts off at the awf container/claude_harness invocation command itself, no error output captured (weak/insufficient evidence, likely truncated before real fault)\",\"run_ids\":[32548469031],\"truncated_error_logs\":[]},{\"id\":\"cluster-5\",\"severity\":\"P0\",\"representative_run_id\":32547658432,\"comparator_run_id\":32548469031,\"workflows\":[\"Smoke Codex\"],\"error_signature\":\"serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed (MCP backend startup_failure during Execute Codex CLI)\",\"run_ids\":[32547658432],\"truncated_error_logs\":[{\"job_id\":96969088905,\"job_name\":\"agent\",\"line_count\":50,\"tail_lines\":\"agent\\tUNKNOWN STEP\\t2026-08-22T03:01:32.8064329Z [2026-08-22T02:59:58.190Z] [INFO] [backend] [stderr] raise LanguageServerManagerInitialisationError(f\\\"Failed to start {len(exceptions)} language server(s):\\\\n{failure_messages}\\\")\\nagent\\tUNKNOWN STEP\\t2026-08-22T03:01:32.8065652Z [2026-08-22T02:59:58.191Z] [INFO] [backend] [stderr] serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s):\\nagent\\tUNKNOWN STEP\\t2026-08-22T03:01:32.8066948Z [2026-08-22T02:59:58.191Z] [INFO] [backend] [stderr] go: Go is not installed. Please install Go from https://golang.org/doc/install and make sure it is added to your PATH.\",\"capture_likely_missed_fault\":false}]}]}\n```"},{"type":"text","text":"agentId: af286133c201dbd8e (use SendMessage with to: 'af286133c201dbd8e', summary: '<5-10 word recap>' to continue this agent)\n<usage>subagent_tokens: 77496\ntool_uses: 4\nduration_ms: 51947</usage>"}]}]},"parent_tool_use_id":null,"session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708","uuid":"7c70431a-ae8a-40f4-8767-386a626b52d0","timestamp":"2026-08-22T07:05:59.406Z","tool_use_result":{"status":"completed","prompt":"You are acting as a \"failure-classifier\" agent for gh-aw CI failure triage. Follow these exact instructions:\n\n---\nYou receive a JSON array of `failures` from the pre-fetch payload. Each entry has `run_id`, `workflow_name`, `workflow_path`, `conclusion`, `failed_job_names`, `failed_steps`, and `truncated_error_logs`. Treat a `truncated_error_logs` entry with `capture_likely_missed_fault: true` as insufficient evidence, never as a failure signature.\n\nGroup failures into clusters:\n1. Cluster by dominant error signature extracted from `truncated_error_logs[].tail_lines`; gro

Critical vulnerabilities detected in container images; Process completed with exit code 1 (gate step 'Enforce critical vulnerability and license gates')\",\"run_ids\":[32554786176],\"truncated_error_logs\":[{\"job_id\":96987189859,\"job_name\":\"agent\",\"line_count\":50,\"tail_lines\":\"agent\\tEnforce critical vulnerability and license gates\\t2026-08-22T06:03:23.8015789Z ##[error]Critical vulnerabilities detected in container images.\\nagent\\tEnforce critical vulnerability and license gates\\t2026-08-22T06:03:23.8025233Z ##[error]Process completed with exit code 1.\",\"capture_likely_missed_fault\":false}]},{\"id\":\"cluster-2\",\"severity\":\"P2\",\"representative_run_id\":32553765299,\"comparator_run_id\":32554786176,\"workflows\":[\"Issue Arborist\"],\"error_signature\":\"Execute Codex CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\",\"run_ids\":[32553765299],\"truncated_error_logs\":[]},{\"id\":\"cluster-3\",\"severity\":\"P2\",\"representative_run_id\":32548891852,\"comparator_run_id\":32548469031,\"workflows\":[\"Code Simplifier\"],\"error_signature\":\"Execute GitHub Copilot CLI step failed; captured tail shows only safeoutputs MCP server startup/tools-list handshake, no explicit error line (weak/insufficient evidence)\",\"run_ids\":[32548891852],\"truncated_error_logs\":[]},{\"id\":\"cluster-4\",\"severity\":\"P2\",\"representative_run_id\":32548469031,\"comparator_run_id\":32548891852,\"workflows\":[\"Design Decision Gate 🏗️\"],\"error_signature\":\"Execute Claude Code CLI step failed; captured tail cuts off at the awf container/claude_harness invocation command itself, no error output captured (weak/insufficient evidence, likely truncated before real fault)\",\"run_ids\":[32548469031],\"truncated_error_logs\":[]},{\"id\":\"cluster-5\",\"severity\":\"P0\",\"representative_run_id\":32547658432,\"comparator_run_id\":32548469031,\"workflows\":[\"Smoke Codex\"],\"error_signature\":\"serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed (MCP backend startup_failure during Execute Codex CLI)\",\"run_ids\":[32547658432],\"truncated_error_logs\":[{\"job_id\":96969088905,\"job_name\":\"agent\",\"line_count\":50,\"tail_lines\":\"agent\\tUNKNOWN STEP\\t2026-08-22T03:01:32.8064329Z [2026-08-22T02:59:58.190Z] [INFO] [backend] [stderr] raise LanguageServerManagerInitialisationError(f\\\"Failed to start {len(exceptions)} language server(s):\\\\n{failure_messages}\\\")\\nagent\\tUNKNOWN STEP\\t2026-08-22T03:01:32.8065652Z [2026-08-22T02:59:58.191Z] [INFO] [backend] [stderr] serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s):\\nagent\\tUNKNOWN STEP\\t2026-08-22T03:01:32.8066948Z [2026-08-22T02:59:58.191Z] [INFO] [backend] [stderr] go: Go is not installed. Please install Go from https://golang.org/doc/install and make sure it is added to your PATH.\",\"capture_likely_missed_fault\":false}]}]}\n```","usage":{"total_tokens":73181,"tool_uses":4,"duration_ms":51945},"uuid":"6b9dd647-a6d2-43a1-a485-164d67f6f5a7","session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708"}

\" lines, exception tracebacks, exit codes) within the noise. Treat noisy/uninformative tail_lines (mostly MCP tool schema dumps or shell script text with no clear error) as weak/insufficient evidence for that entry.\n\nOutput ONLY the JSON object per the schema above, nothing else."}]},"parent_tool_use_id":"toolu_01MyZsUTpnFEyNZjycpoGLCd","session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708","uuid":"a13cc3de-1e26-4a91-9bb4-cd4f9412db15","timestamp":"2026-08-22T07:05:07.459Z","subagent_type":"general-purpose","task_description":"Classify failure clusters"}

\" lines, exception tracebacks, exit codes) within the noise. Treat noisy/uninformative tail_lines (mostly MCP tool schema dumps or shell script text with no clear error) as weak/insufficient evidence for that entry.\n\nOutput ONLY the JSON object per the schema above, nothing else.","uuid":"b6b4af78-be5c-4208-864f-6a41cede35ea","session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708"}

\" lines, exception tracebacks, exit codes) within the noise. Treat noisy/uninformative tail_lines (mostly MCP tool schema dumps or shell script text with no clear error) as weak/insufficient evidence for that entry.\n\nOutput ONLY the JSON object per the schema above, nothing else.","run_in_background":false},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":42,"cache_creation_input_tokens":596,"cache_read_input_tokens":87025,"cache_creation":{"ephemeral_5m_input_tokens":596,"ephemeral_1h_input_tokens":0},"output_tokens":2,"service_tier":"standard","inference_geo":"global"},"context_management":null},"parent_tool_use_id":null,"session_id":"eff1a3a5-be3a-43ae-8dea-b0af80131708","uuid":"3563aae3-6d87-4486-b950-09b542d3cff8","timestamp":"2026-08-22T07:05:07.457Z","request_id":"req_011CeHMw23JhoodawjKQA9RB"}

`/exit code line anywhere in the 50-line tail.\n\nRun 32089118620 (same workflow, ~3.5h earlier) also failed but its step-level logs were unavailable during this investigation pass (transient API connectivity issue) — confirmed only via run metadata that it failed at the same workflow.\n</details>\n\n### Probable root cause\n\nTimeout/hang signature, not a clean failure: the CLI process appears to be killed while blocked on a large-diff `Read`, and nothing in the workflow surfaces that as a distinguishable error — the log just goes silent.\n\n### Proposed remediation\n\n1. Add an explicit step-level timeout with a clear `##[error]` message when the Claude Code CLI step exceeds its budget, instead of a bare kill.\n2. Cap or paginate the diff size handed to the agent — large `Read` calls on `pr.diff` are the apparent hang point in both failures.\n3. Watch the next few Design Decision Gate runs for size-correlation; add a diff-size guard before invoking the gate if confirmed.\n\n### Success criteria\n\nDesign Decision Gate runs complete (pass or fail) without silent mid-tool-use termination; timeouts show an explicit error in logs; similarly-sized PR diffs no longer trigger the hang.\n\n**Parent:** #53129\nRelated to #53129\n\n\n<!-- gh-aw-tracker-id: aw-failure-investigator -->\n\n> Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32109525808) · agent · 251.3 AIC · ⌖ 6.96 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22&type=issues)\n> - [x] expires <!-- gh-aw-expires: 2026-08-25T07:21:01.618Z --> on Aug 24, 2026, 11:21 PM UTC-08:00\n\n<!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32109525808, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32109525808 -->\n\n<!-- gh-aw-workflow-id: aw-failure-investigator -->\n<!-- gh-aw-workflow-call-id: github/gh-aw/aw-failure-investigator -->\n\n---\n\n### Correction — this is not a silent hang, it's a 429 invocation-cap failure. Keep this open.\n\n**One-sentence rationale:** Design Decision Gate's run today fails fast and loud with `Maximum LLM invocations exceeded (30 / 30)`, a non-retryable rate-limit guard — not the silent hang this issue currently describes.\n\n**Fresh occurrence (2026-08-20):** Design Decision Gate — [§32394421229](https://github.com/github/gh-aw/actions/runs/32394421229). Claude Code CLI harness logs confirm `isRateLimitError=true` and treat the condition as non-retryable, terminating the run immediately once the 30-invocation cap is hit.\n\n**Why this stays open:** no commit since this issue opened has touched this workflow's `.md`/`.lock.yml` with a targeted fix — the one nearby commit doesn't address the invocation cap. Not closing per the tool-denial-limit rule.\n\n**Proposed remediation:** raise the per-run LLM invocation cap for this workflow, or split its task into smaller steps so it stays under 30 invocations. Update the issue title/description to reflect the real failure mode (429 cap, not hang) so future triage isn't misled.> Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32406250112) · agent · 238.8 AIC · ⌖ 7.28 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22&type=issues)\n\n<!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32406250112, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32406250112 -->\n\n---\n\n### Update (2026-08-22) — reproduced again today, keep this open\n\nDesign Decision Gate failed at the \"Execute Claude Code CLI\" step again: [§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031) (2026-08-22 03:15 UTC). Given the pr

Critical vulnerabilities detected in container images` — gate working as designed, not a bug |\n| 2 | P2 | Issue Arborist | [§32553765299](https://github.com/github/gh-aw/actions/runs/32553765299) | Execute Codex CLI failed; captured tail is only the safeoutputs MCP handshake — root cause not captured |\n| 3 | P2 | Code Simplifier | [§32548891852](https://github.com/github/gh-aw/actions/runs/32548891852) | Execute GitHub Copilot CLI failed; same handshake-only capture, no error line |\n| 4 | P1 | Design Decision Gate 🏗️ | [§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031) | Claude Code CLI step hang — matches existing [#53619](https://github.com/github/gh-aw/issues/53619), still recurring today |\n| 5 | **P0** | Smoke Codex | [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) | `serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed` |\n\n### Evidence\n\nCluster 5 dominant error, straight from the job log:\n```\nraise LanguageServerManagerInitialisationError(f\"Failed to start {len(exceptions)} language server(s):\\n{failure_messages}\")\nserena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s):\ngo: Go is not installed. Please install Go from https://golang.org/doc/install and make sure it is added to your PATH.\n```\nFailure class: **infra** — the Serena MCP server container is missing the Go toolchain it needs to spin up `gopls` for Go-configured projects.\n\n`audit-diff` between [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) and the prior Smoke Codex failure [§32336198768](https://github.com/github/gh-aw/actions/runs/32336198768) shows **zero firewall/domain drift** and no anomalies — rules out network/egress as the cause and confirms this is a static container-image defect, not a transient blip.\n\n<details>\n<summary>Blast radius: workflows importing shared/mcp/serena-go.md</summary>\n\narchie, cloclo, daily-function-namer, developer-docs-consolidator, glossary-maintainer, linter-miner, mcp-inspector, purelock, repository-quality-improver, sergo, smoke-codex, smoke-copilot-aoai-apikey, smoke-copilot-aoai-entra, smoke-copilot-arm, smoke-copilot, terminal-stylist, typist\n\n</details>\n\n### Existing issue correlation\n\n| Cluster | Matched issue | Confidence |\n|---|---|---|\n| 4 (Design Decision Gate) | [#53619](https://github.com/github/gh-aw/issues/53619) | high — still open, still reproducing today |\n| 5 (Serena Go crash) | none | — new gap, this issue |\n| 1, 2, 3 | none | P2, insufficient log capture to file a concrete fix yet |\n\n[#53191](https://github.com/github/gh-aw/issues/53191) was checked as a possible match for cluster 5 and ruled out — it covers a `serena` MCP **Gateway config schema** rejection of digest-pinned images, not a missing Go binary inside the container. Different root cause, different fix.\n\n### Fix roadmap\n\n- **P0:** Bundle Go + `gopls` into the `ghcr.io/oraios/serena:latest` image, or add a Go install step to `shared/mcp/serena-go.md` before `activate_project` is called. See sub-issue below.\n- **P1:** [#53619](https://github.com/github/gh-aw/issues/53619) — Design Decision Gate Claude Code CLI hang reproduced again today ([§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031)); update that issue with the fresh run, don't reopen work here.\n- **P2:** Widen truncated-log capture for Issue Arborist / Code Simplifier — current capture stops at the MCP tool-schema handshake and never reaches the real Codex/Copilot CLI error, blocking root-cause work on clusters 2 and 3.\n\n### Sub-issues created\n\n- Serena Go toolchain fix (linked below)\n","labels":["bug","automation","agentic-workflows"],"temporary_id":"#aw_serego1","title":"[P0] Serena Go language server crashes on missing Go toolchain — breaks 17 shared/mcp/serena-go.md workflows"}}}

`/exit code line anywhere in the 50-line tail.\n\nRun 32089118620 (same workflow, ~3.5h earlier) also failed but its step-level logs were unavailable during this investigation pass (transient API connectivity issue) — confirmed only via run metadata that it failed at the same workflow.\n\u003c/details\u003e\n\n### Probable root cause\n\nTimeout/hang signature, not a clean failure: the CLI process appears to be killed while blocked on a large-diff `Read`, and nothing in the workflow surfaces that as a distinguishable error — the log just goes silent.\n\n### Proposed remediation\n\n1. Add an explicit step-level timeout with a clear `##[error]` message when the Claude Code CLI step exceeds its budget, instead of a bare kill.\n2. Cap or paginate the diff size handed to the agent — large `Read` calls on `pr.diff` are the apparent hang point in both failures.\n3. Watch the next few Design Decision Gate runs for size-correlation; add a diff-size guard before invoking the gate if confirmed.\n\n### Success criteria\n\nDesign Decision Gate runs complete (pass or fail) without silent mid-tool-use termination; timeouts show an explicit error in logs; similarly-sized PR diffs no longer trigger the hang.\n\n**Parent:** #53129\nRelated to #53129\n\n\n\u003c!-- gh-aw-tracker-id: aw-failure-investigator --\u003e\n\n\u003e Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32109525808) · agent · 251.3 AIC · ⌖ 6.96 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22\u0026type=issues)\n\u003e - [x] expires \u003c!-- gh-aw-expires: 2026-08-25T07:21:01.618Z --\u003e on Aug 24, 2026, 11:21 PM UTC-08:00\n\n\u003c!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32109525808, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32109525808 --\u003e\n\n\u003c!-- gh-aw-workflow-id: aw-failure-investigator --\u003e\n\u003c!-- gh-aw-workflow-call-id: github/gh-aw/aw-failure-investigator --\u003e\n\n---\n\n### Correction — this is not a silent hang, it's a 429 invocation-cap failure. Keep this open.\n\n**One-sentence rationale:** Design Decision Gate's run today fails fast and loud with `Maximum LLM invocations exceeded (30 / 30)`, a non-retryable rate-limit guard — not the silent hang this issue currently describes.\n\n**Fresh occurrence (2026-08-20):** Design Decision Gate — [§32394421229](https://github.com/github/gh-aw/actions/runs/32394421229). Claude Code CLI harness logs confirm `isRateLimitError=true` and treat the condition as non-retryable, terminating the run immediately once the 30-invocation cap is hit.\n\n**Why this stays open:** no commit since this issue opened has touched this workflow's `.md`/`.lock.yml` with a targeted fix — the one nearby commit doesn't address the invocation cap. Not closing per the tool-denial-limit rule.\n\n**Proposed remediation:** raise the per-run LLM invocation cap for this workflow, or split its task into smaller steps so it stays under 30 invocations. Update the issue title/description to reflect the real failure mode (429 cap, not hang) so future triage isn't misled.\u003e Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/32406250112) · agent · 238.8 AIC · ⌖ 7.28 AIC · ⊞ 5.9K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3Aissue+%22gh-aw-workflow-call-id%3A+github%2Fgh-aw%2Faw-failure-investigator%22\u0026type=issues)\n\n\u003c!-- gh-aw-agentic-workflow: [aw] Failure Investigator (6h), gh-aw-tracker-id: aw-failure-investigator, engine: claude, model: agent, id: 32406250112, workflow_id: aw-failure-investigator, run: https://github.com/github/gh-aw/actions/runs/32406250112 --\u003e\n\n---\n\n### Update (2026-08-22) — reproduced again today, keep this open\n\nDesign Decision Gate failed at the \"Execute Claude Code CLI\" step again: [§32548469031]

Critical vulnerabilities detected in container images` — gate working as designed, not a bug |\n| 2 | P2 | Issue Arborist | [§32553765299](https://github.com/github/gh-aw/actions/runs/32553765299) | Execute Codex CLI failed; captured tail is only the safeoutputs MCP handshake — root cause not captured |\n| 3 | P2 | Code Simplifier | [§32548891852](https://github.com/github/gh-aw/actions/runs/32548891852) | Execute GitHub Copilot CLI failed; same handshake-only capture, no error line |\n| 4 | P1 | Design Decision Gate 🏗️ | [§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031) | Claude Code CLI step hang — matches existing [#53619](https://github.com/github/gh-aw/issues/53619), still recurring today |\n| 5 | **P0** | Smoke Codex | [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) | `serena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s): go: Go is not installed` |\n\n### Evidence\n\nCluster 5 dominant error, straight from the job log:\n```\nraise LanguageServerManagerInitialisationError(f\"Failed to start {len(exceptions)} language server(s):\\n{failure_messages}\")\nserena.ls_manager.LanguageServerManagerInitialisationError: Failed to start 1 language server(s):\ngo: Go is not installed. Please install Go from https://golang.org/doc/install and make sure it is added to your PATH.\n```\nFailure class: **infra** — the Serena MCP server container is missing the Go toolchain it needs to spin up `gopls` for Go-configured projects.\n\n`audit-diff` between [§32547658432](https://github.com/github/gh-aw/actions/runs/32547658432) and the prior Smoke Codex failure [§32336198768](https://github.com/github/gh-aw/actions/runs/32336198768) shows **zero firewall/domain drift** and no anomalies — rules out network/egress as the cause and confirms this is a static container-image defect, not a transient blip.\n\n\u003cdetails\u003e\n\u003csummary\u003eBlast radius: workflows importing shared/mcp/serena-go.md\u003c/summary\u003e\n\narchie, cloclo, daily-function-namer, developer-docs-consolidator, glossary-maintainer, linter-miner, mcp-inspector, purelock, repository-quality-improver, sergo, smoke-codex, smoke-copilot-aoai-apikey, smoke-copilot-aoai-entra, smoke-copilot-arm, smoke-copilot, terminal-stylist, typist\n\n\u003c/details\u003e\n\n### Existing issue correlation\n\n| Cluster | Matched issue | Confidence |\n|---|---|---|\n| 4 (Design Decision Gate) | [#53619](https://github.com/github/gh-aw/issues/53619) | high — still open, still reproducing today |\n| 5 (Serena Go crash) | none | — new gap, this issue |\n| 1, 2, 3 | none | P2, insufficient log capture to file a concrete fix yet |\n\n[#53191](https://github.com/github/gh-aw/issues/53191) was checked as a possible match for cluster 5 and ruled out — it covers a `serena` MCP **Gateway config schema** rejection of digest-pinned images, not a missing Go binary inside the container. Different root cause, different fix.\n\n### Fix roadmap\n\n- **P0:** Bundle Go + `gopls` into the `ghcr.io/oraios/serena:latest` image, or add a Go install step to `shared/mcp/serena-go.md` before `activate_project` is called. See sub-issue below.\n- **P1:** [#53619](https://github.com/github/gh-aw/issues/53619) — Design Decision Gate Claude Code CLI hang reproduced again today ([§32548469031](https://github.com/github/gh-aw/actions/runs/32548469031)); update that issue with the fresh run, don't reopen work here.\n- **P2:** Widen truncated-log capture for Issue Arborist / Code Simplifier — current capture stops at the MCP tool-schema handshake and never reaches the real Codex/Copilot CLI error, blocking root-cause work on clusters 2 and 3.\n\n### Sub-issues created\n\n- Serena Go toolchain fix (linked below)\n","labels":["bug","automation","agentic-workflows"],"temporary_id":"#aw_serego1","title":"[P0] Serena Go language server crashes on missing Go toolchain — breaks 17 shared/mcp/serena-go.md workflows"},"name":"create_issue"}}}

Process completed with exit code 35.\n...\n/home/runner/work/_temp/....sh: line 43: awf: command not found\n##[error]Process completed with exit code 127.\n```\n\nCascade: `Install AWF binary` fails → later evals steps are skipped, including `Upload evals results` → the downstream `conclusion` job then fails with `Unable to download artifact(s): Artifact not found for name: evals`, which is what the CI status surfaces as the \"real\" error even though the true cause is upstream.\n\u003c/details\u003e\n\n**Probable root cause:** `install_awf_binary.sh` has no retry/backoff around the `curl` download of `checksums.txt` from GitHub Releases, so a single transient TLS reset takes down the whole evals job and only surfaces downstream as a confusing artifact-not-found error.\n\n**Proposed remediation:** add `curl --retry 3 --retry-delay 2 --retry-connrefused` (or equivalent) to the checksum/binary download in `install_awf_binary.sh`. Also make the downstream artifact-download step tolerate a missing `evals` artifact with a clear \"evals skipped upstream\" message instead of a raw `Unable to download artifact(s)` error.\n\n**Success criteria:** the install step retries through a transient network blip instead of failing the whole job; if retries are exhausted, the top-level failure names the real cause (network) instead of only showing a missing-artifact error three jobs downstream.\n\n---\n\n### Fix the MCP Gateway config (schema or generator) to accept digest-pinned container images — `serena`'s `@sha256:...` reference fails validation and blocks the whole run.\n\nPackage Specification Librarian failed at `Start MCP Gateway` in [§31949448689](https://github.com/github/gh-aw/actions/runs/31949448689) (2026-08-16 13:23 UTC), before the agent ever ran.\n\n\u003cdetails\u003e\n\u003csummary\u003eRaw failure evidence\u003c/summary\u003e\n\n```\nConfiguration validation error (MCP Gateway version: v0.4.9):\nError: jsonschema validation failed with '.../mcp-gateway-config.schema.json#'\n Error: 'oneOf' failed, none matched\n Error: 'ghcr.io/oraios/serena:latest@sha256:[REDACTED]' does not match pattern '^[a-zA-Z0-9][a-zA-Z0-9./_-]*(:([a-zA-Z0-9._-]+|latest))?$'\n Error: missing property 'url'\n Error: value must be 'http'\n Error: additional properties 'entrypointArgs', 'mounts', 'args', 'container', 'entrypoint' not allowed\nERROR: Gateway failed to become ready\n```\n\u003c/details\u003e\n\n**Probable root cause:** the committed lock file's `\"serena\"` MCP server config uses a plain tag (`ghcr.io/oraios/serena:latest`), but at runtime the gateway config is resolved/re-pinned to include a `@sha256:...` digest suffix — and the schema's container-image regex pattern rejects any `@sha256:` suffix, only bare tags pass. This is a **shared-component bug**: both Linter Miner and Package Specification Librarian import the same `shared/mcp/serena.md`, so every workflow using this shared Serena MCP config is at risk of hitting the same schema rejection.\n\n**Proposed remediation:** either (a) loosen `mcp-gateway-config.schema.json`'s container-image pattern to accept `@sha256:\u003c64-hex\u003e` digest suffixes, or (b) stop injecting a resolved digest into the `container` field for stdio-type MCP servers at gateway-config-build time, keeping the plain tag the lock file already specifies.\n\n**Success criteria:** Package Specification Librarian (and any other workflow importing `shared/mcp/serena.md`) starts the MCP Gateway with `serena` registered successfully, with no `jsonschema validation failed` error, across the next 3 scheduled runs.\n\n**References:**\n- [§31957063541](https://github.com/github/gh-aw/actions/runs/31957063541)\n- [§31949448689](https://github.com/github/gh-aw/actions/runs/31949448689)\nRelated to #53129\n\n\n\u003c!-- gh-aw-tracker-id: aw-failure-investigator --\u003e\n\n\u003e Generated by [🔍 [aw] Failure Investigator (6h)](https://github.com/github/gh-aw/actions/runs/31965944876) · agent · 210.1 AIC · ⌖ 7 AIC · ⊞ 5.6K · [◷](https://github.com/search?q=repo%3Agithub%2Fgh-aw+is%3A

Failed to scan directory /tmp/gh-aw/aw-mcp/logs/run-32547658432/usage: EACCES: permission denied, scandir '/tmp/gh-aw/aw-mcp/logs/run-32547658432/usage'