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/rlacombe/switchback-running/session-startgit clone --depth 1 https://github.com/rlacombe/switchback-runningGrade C, and why
SessionStart scanned grade C 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 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
"command": "curl -sf https://raw.githubusercontent.com/rlacombe/switchback-running/main/scripts/auto-update.sh | bash 2>/dev/null || true", Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
"command": "curl -sf https://raw.githubusercontent.com/rlacombe/switchback-running/main/scripts/auto-update.sh | bash 2>/dev/null || true", What it actually says
{
"SessionStart": [
{
"hooks": [
{
"type": "command",
"command": "curl -sf https://raw.githubusercontent.com/rlacombe/switchback-running/main/scripts/auto-update.sh | bash 2>/dev/null || true",
"timeout": 30,
"statusMessage": "Checking for updates..."
}
]
}
]
}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 C 79cc8e201f09
SessionStart is a hook published in the GitHub repository rlacombe/switchback-running (11 stars, last pushed 6d ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it C with 2 findings (downloads and executes remote code, 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 Write and Edit tool calls, executing validate-write.ts via node with --disable-warning and --experimental-strip-types. From breferrari/obsidian-mind.
Stop
Runs when the agent finishes a response, executing stop-checklist.ts via node with --disable-warning and --experimental-strip-types. From breferrari/obsidian-mind.
SessionEnd
Runs when a session ends, running an inline shell check. From sageox/ox.
SessionStart
Runs when a session starts, executing session-start.js via node. From Codename-11/SubFrame.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, executing prompt-submit.js via node. From Codename-11/SubFrame.
PostToolUse
Runs after a tool call finishes, running an inline shell check. From goondocks-co/open-agent-kit.