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/gastownhall/beads/pre-compactgit clone --depth 1 https://github.com/gastownhall/beadsGrade 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 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
{
"PreCompact": [
{
"matcher": "manual|auto",
"hooks": [
{
"type": "command",
"command": "bd codex-hook PreCompact",
"statusMessage": "Checking Beads context"
}
]
}
]
}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 a8e8704f6308
PreCompact is a hook published in the GitHub repository gastownhall/beads (26,754 stars, last pushed yesterday), 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, executing auto-recall.sh via bash (2 commands). From roberto-mello/lavra.
PostToolUse
Runs after a tool call finishes for Bash tool calls, executing memory-capture.sh via bash. From roberto-mello/lavra.
SubagentStop
Runs when a subagent finishes, executing subagent-wrapup.sh via bash. From roberto-mello/lavra.
TeammateIdle
Runs on the TeammateIdle event, executing teammate-idle-check.sh. From roberto-mello/lavra.
PreCompact
Runs before the context is compacted, running bd prime. From roberto-mello/lavra.
PreToolUse
Runs before the agent uses a tool for Bash, mcp__github__create_pull_request and mcp__github__merge_pull_request tool calls, executing validate-pr-creation.sh, validate-local-testing.sh, validate-pr-merge.sh and validate-tests-pass.sh (4 commands). From troykelly/claude-skills.