Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add xiaobei930/cc-best/plugin install cc-bestWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/hooks/xiaobei930/cc-best/post-tool-use-failure)<a href="https://agentmods.dev/hooks/xiaobei930/cc-best/post-tool-use-failure"><img src="https://agentmods.dev/badge/hooks/xiaobei930/cc-best/post-tool-use-failure.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
PostToolUseFailure scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
{
"PostToolUseFailure": [
{
"matcher": ".*",
"hooks": [
{
"type": "command",
"command": "node \"${CLAUDE_PLUGIN_ROOT}/scripts/node/hooks/post-tool-failure.js\"",
"timeout": 3
}
],
"description": "失败追踪: 工具调用失败后记录错误模式，检测重复失败（红旗增强）"
}
]
}What else hooks.json configures
This page is one entry in a file that holds 20. Installing the file brings all of them; each is measured and scanned on its own page.
- Hook ConfigChange A not measured
- Hook CwdChanged A not measured
- Hook FileChanged A not measured
- Hook InstructionsLoaded A not measured
- Hook MessageDisplay A not measured
- Hook Notification A not measured
- Hook PermissionDenied A not measured
- Hook PermissionRequest A not measured
- Hook PostCompact A not measured
- Hook PostToolUse A not measured
- Hook PreCompact A not measured
- Hook PreToolUse C not measured
- Hook SessionEnd A not measured
- Hook SessionStart A not measured
- Hook Stop A not measured
- Hook SubagentStart A not measured
- Hook SubagentStop A not measured
- Hook TaskCompleted A not measured
- Hook UserPromptSubmit A not measured
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 15 lines scan A fc2a81fb0a54
PostToolUseFailure is a hook published in the GitHub repository xiaobei930/cc-best (50 stars, last pushed 2mo ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other hooks, from other repositories
PostToolUse
Runs after a tool call finishes for Edit and Write tool calls, executing auto-format.sh, version-consistency-check.sh and activity-logger.sh via bash (3 commands). From FlorianBruniaux/claude-code-ultimate-guide.
PreToolUse
Runs before the agent uses a tool for Bash, Edit and Write tool calls, executing dangerous-actions-blocker.sh via bash. From FlorianBruniaux/claude-code-ultimate-guide.
SessionStart
Runs when a session starts, executing rtk-baseline.sh. From FlorianBruniaux/claude-code-ultimate-guide.
Notification
Runs when the agent sends a notification, executing notification.sh via bash. From FlorianBruniaux/claude-code-ultimate-guide.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, executing smart-suggest.sh. From FlorianBruniaux/claude-code-ultimate-guide.
Stop
Runs when the agent finishes a response, executing index-sync-reminder.sh via bash. From FlorianBruniaux/claude-code-ultimate-guide.