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/thesmokedev/taskchad-os/pre-compactgit clone --depth 1 https://github.com/TheSmokeDev/taskchad-osWrote 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/thesmokedev/taskchad-os/pre-compact)<a href="https://agentmods.dev/hooks/thesmokedev/taskchad-os/pre-compact"><img src="https://agentmods.dev/badge/hooks/thesmokedev/taskchad-os/pre-compact.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
PreCompact 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 4d 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
{
"PreCompact": [
{
"matcher": "",
"hooks": [
{
"type": "command",
"command": "cd \"$CLAUDE_PROJECT_DIR/.claude/scripts\" && PATH=\"$PATH:/root/.local/bin\" uv run python \"$CLAUDE_PROJECT_DIR/.claude/hooks/pre-compact-flush.py\"",
"timeout": 10
}
]
}
]
}What else settings.json configures
This page is one entry in a file that holds 5. 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.
- 4d ago First seen · 14 lines scan A 9138d6cbddbe
PreCompact is a hook published in the GitHub repository TheSmokeDev/taskchad-os (23 stars, last pushed 11d 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
SessionStart
Runs when a session starts on startup and resume, executing deja.sh. From vshulcz/deja-vu.
SessionStart
Runs when a session starts on startup, resume and compact, executing session-start.sh via bash (3 commands). From JKHeadley/instar.
SubagentStop
Runs when a subagent finishes, executing observe.sh via bash. From kage-core/Kage.
SessionEnd
Runs when a session ends, running acc hook session-end --host claude-code. From maxbaluev/accreted-intelligence.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, executing _run_hook.sh via bash. From lemoncrow-lab/lemoncrow.
PreCompact
Runs before the context is compacted, running an inline shell check. From nickroci/ultan.