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/cdeust/session-optimizerWrote 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/cdeust/session-optimizer/session-start)<a href="https://agentmods.dev/hooks/cdeust/session-optimizer/session-start"><img src="https://agentmods.dev/badge/hooks/cdeust/session-optimizer/session-start/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/cdeust/session-optimizer/session-start"><img src="https://agentmods.dev/badge/hooks/cdeust/session-optimizer/session-start.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade 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 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.
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 '[session-optimizer] DEPRECATED (v2.0.0): this meta plugin no longer provides any hooks. It split into three independent plugins on the same marketplace - context-guard (Stop-hook context budget + memory-writer checkpoint subagent + subagent spend tracker), refine-gate (UserPromptSubmit prompt-binding gate + /refine skill), and statusline (multi-line status bar; run its statusline skill to install). Tell the user to install the plugins they want, then uninstall session-optimizer to silence this notice.'",
"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.
- 1mo ago First seen · 14 lines scan A 8c63199886ca
SessionStart is a hook published in the GitHub repository cdeust/session-optimizer (1 stars, last pushed 5d 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 2026-08-31.
Other hooks, from other repositories
PreToolUse
Runs before the agent uses a tool for WebSearch and WebFetch tool calls, running an inline shell check (2 commands). From Djarvur/cc-websearch.
ConfigChange
Runs on the ConfigChange event, executing journal_event.sh via bash. From Nova-Violet-Role/RoT-DTD-GOAL.
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.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.
PreToolUse
Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.