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.
npx agentmods add hooks/cdeust/cortex/session-startgit clone --depth 1 https://github.com/cdeust/CortexGrade A, and why
SessionStart 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 yesterday.
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
{
"SessionStart": [
{
"matcher": "startup",
"hooks": [
{
"type": "command",
"command": "echo '[cortex] DEPRECATED (v4.15.0): this plugin was renamed to hypermnesia-mcp. Install hypermnesia-mcp from this same marketplace, then uninstall cortex to silence this notice - your memories and configuration are untouched (storage paths do not change).'",
"timeout": 5
}
]
}
]
}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.
- yesterday First seen · 14 lines scan A 482f2da54bc8
SessionStart is a hook published in the GitHub repository cdeust/Cortex (71 stars, last pushed 3d 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
PreCompact
Runs before the context is compacted, running python3. From memseekai/memseek.
Stop
Runs when the agent finishes a response, executing graphmind-session-stop.mjs via node. From kostya-pakhomov/graphmind.
SubagentStop
Runs when a subagent finishes, executing run-custom.mjs via node. From livewithlively/lively.
PostCompact
Runs after the context is compacted, executing run-custom.mjs via node. From livewithlively/lively.
SessionStart
Runs when a session starts, executing session-start.sh. From fruggr/zendesk-mcp-server.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, running an inline shell check. From lancegui/causal-powers.