MCP, MCP server
Agent Failure Archive
186 post-mortems from running a multi-session AI agent system in production for 8 months. Pay per call with x402.
Compatibility: Not stated.
Grade C
One Medium finding. Read the findings before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit afce68a34ea9, unchanged since the check below.
PERMISSION_SHELL_UNDECLARED
Why this grade
- PERMISSION_SHELL_UNDECLARED Medium
Runs shell commands that the manifest or description does not mention.
data/failure_corpus.jsonl, line 35
{"id": "162", "kind": "adr", "title": "ADR-162: T9OS Machine Awareness + IPC remote bridge (Phase 1)", "symptom": "After writing ADR-158/160, the operator pointed out (2026-05-12):
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Concern
requests shell access. No manifest field names shell or command execution.
PERMISSION_SHELL_UNDECLARED
data/failure_corpus.jsonl, line 35
{"id": "162", "kind": "adr", "title": "ADR-162: T9OS Machine Awareness + IPC remote bridge (Phase 1)", "symptom": "After writing ADR-158/160, the operator pointed out (2026-05-12):
data/failure_corpus.jsonl, line 36
{"id": "165", "kind": "adr", "title": "ADR-165: t9_seed.py DB remote bridge (Phase 2)", "symptom": "`T9OS/t9_seed.py` (line 927) = T9 OS Seed single entry point. `main()` handles 3
data/failure_corpus.jsonl, line 45
{"id": "186", "kind": "adr", "title": "ADR-186: session_live_read reindex spawn pre-lock check - WAL bloat prevention", "symptom": "", "root_cause": "ADR-185 blocked concurrent rei
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data/failure_corpus.jsonl, line 76
{"id": "278", "kind": "adr", "title": "ADR-278: healthcheck model_version_diff automatic trigger (remove cron dependency)", "symptom": "ADR-276 §2.1 hardcoded `model_version_diff`
Install and update
Concern
dependencies are not pinned.
INSTALL_UNPINNED
requirements.txt, line 2
fastapi>=0.115
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
mcp_server.py, line 96
r = requests.get(f"{BASE}{path}", params=params, timeout=TIMEOUT)
mcp_server.py, line 108
r = requests.get(f"{BASE}{path}", params=params, timeout=TIMEOUT)
server.py, line 88
with urllib.request.urlopen(CORPUS_URL, timeout=10) as fh:
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data/failure_corpus.jsonl, line 66
{"id": "257", "kind": "adr", "title": "ADR-257: local_llm.is_available() llama-server 우선 검사", "symptom": "ADR-253이 healthcheck `local_llm` SKIP → WARN 승격 박은 직후 본 cc 실측:\n```\n⚠️ 모듈
data/failure_corpus.jsonl, line 74
{"id": "274", "kind": "adr", "title": "ADR-274: Replace langue.py Gemini wrapper + audit remaining direct calls", "symptom": "Found in Codex Round 4 #5: ADR-254/255 replaced legacy
data/failure_corpus.jsonl, line 139
{"id": "457", "kind": "adr", "title": "ADR-457: Integrate Aside agent browser into cc browser/bot-blocking backend", "symptom": "- G2 (DataDome bot blocking): normal crawler 403, e
Secrets
Concern
reads a credential or environment file.
SECRETS_ENV_READ SECRETS_PATH_DOTENV
mcp_server.py, line 67
key = os.environ.get("X402_PRIVATE_KEY", "").strip()
data/failure_corpus.jsonl, line 43
{"id": "181", "kind": "adr", "title": "ADR-181: MacBook cc harness alignment (Seoul full sync)", "symptom": "MacBook cc harness had large gap with Seoul PC. Precision measurement s
data/failure_corpus.jsonl, line 54
{"id": "222", "kind": "adr", "title": "ADR-222: mac T9OS hardcoding eradication + automatic RAG recovery + gdrive MCP forced rule", "symptom": "1. **`.claude/hooks/user-prompt-subm
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data/failure_corpus.jsonl, line 62
{"id": "249", "kind": "adr", "title": "ADR-249: _keys/.env.sh 양쪽 parity + 회전 추적 + expected_keys 검사", "symptom": "Codex Round 2 (2026-05-26) #4 발견:\n- `lib/config.py`는 `_keys/.env.s
data/failure_corpus.jsonl, line 67
{"id": "262", "kind": "adr", "title": "ADR-262: env_parity local missing P0 분리", "symptom": "ADR-249 `env_parity_check.sh`가 local `_keys/.env.sh` 없으면 다음 JSON 반환 후 exit 0:\n```json\
data/failure_corpus.jsonl, line 99
{"id": "367", "kind": "adr", "title": "ADR-367: mac MCP server local execution switch (ssh-stdio deprecated, per-call delegation)", "symptom": "The t9-ipc / t9-seed MCP on the MacB
data/failure_corpus.jsonl, line 130
{"id": "433", "kind": "adr", "title": "ADR-433: RAG hook timeout (rc=124) complete fix (warm embedding server + multi-axis parallel)", "symptom": "mac UserPromptSubmit hook's RAG r
data/failure_corpus.jsonl, line 147
{"id": "484", "kind": "adr", "title": "ADR-484: RAG hook cold timeout eradication, Seoul keep-warm cron + blind retry abolition", "symptom": "timeout_ledger measurement: `rag.hook.
data/failure_corpus.jsonl, line 153
{"id": "500", "kind": "adr", "title": "ADR-500: Seoul Windows server-ization - IPv6 sshd emergency door + app diet + port structure pinning", "symptom": "1. **Fake emergency door**
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
a file was over the read cap and was not fully read.
OBFUSCATION_FILE_OVER_READ_CAP
data/failure_corpus.jsonl, line 1
{"id": "adr-naming", "kind": "rule", "title": "[rule] ADR number race blocking (ADR-198 follow-up, 2026-05-19)", "symptom": "- 2026-05-19 on mac, multiple number collisions found f
Licence
Note
no licence file found.
LICENCE_MISSING
No file path was stored.
no licence file found.
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit afce68a34ea9. requests shell access. No manifest field names shell or command execution. dependencies are not pinned. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read. no licence file found.
Date and source
Date checked:
github.com
Commit graded: afce68a34ea9604a8d5b940e100914e474060520
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