Claude Code Agent Monitor is a dashboard that records and displays activity from Claude Code and Codex coding-agent sessions, including tool use and subagent coordination. It is for people who need live visibility into agent work through a web interface or native desktop app. The catalogue entries extend Claude Code with skills, commands, agents, plugins, instructions, hooks, and settings related to the monitor.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/hoangsonww/Claude-Code-Agent-MonitorWrote 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/hoangsonww/claude-code-agent-monitor/subagent-stop)<a href="https://agentmods.dev/hooks/hoangsonww/claude-code-agent-monitor/subagent-stop"><img src="https://agentmods.dev/badge/hooks/hoangsonww/claude-code-agent-monitor/subagent-stop/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/hooks/hoangsonww/claude-code-agent-monitor/subagent-stop"><img src="https://agentmods.dev/badge/hooks/hoangsonww/claude-code-agent-monitor/subagent-stop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade B, and why
SubagentStop scanned grade B with 2 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 1mo 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.
Sends data to an external URLmediumData exfiltration
A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.
"command": "jq -r '{session_id: .session_id, agent_id: .agent_id, stop_reason: .stop_reason, timestamp: now | todate}' | curl -s -X POST http://localhost:4820/api/hooks/event -H 'Content-Type: application/json' -d @- > / Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
"command": "jq -r '{session_id: .session_id, agent_id: .agent_id, stop_reason: .stop_reason, timestamp: now | todate}' | curl -s -X POST http://localhost:4820/api/hooks/event -H 'Content-Type: application/json' -d @- > / What it actually says
{
"SubagentStop": [
{
"matcher": "",
"hooks": [
{
"type": "command",
"command": "jq -r '{session_id: .session_id, agent_id: .agent_id, stop_reason: .stop_reason, timestamp: now | todate}' | curl -s -X POST http://localhost:4820/api/hooks/event -H 'Content-Type: application/json' -d @- > /dev/null 2>&1 || true"
}
]
}
]
}What else hooks.json configures
This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.
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.
- 1mo ago First seen · 13 lines scan B 127ba44026a8
SubagentStop is a hook published in the GitHub repository hoangsonww/Claude-Code-Agent-Monitor (1,124 stars, last pushed 4d ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). 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 TaskCreate, TaskUpdate, Write and Edit tool calls, executing bin.mjs via bun. From fusengine/agents.
PreToolUse
Runs before the agent uses a tool for Task tool calls, executing bin.mjs via bun. From fusengine/agents.
SubagentStop
Runs when a subagent finishes, executing bin.mjs via bun. From fusengine/agents.
SessionEnd
Runs when a session ends, executing bin.mjs via bun. From fusengine/agents.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.