agentmods.dev

SessionStart

A session-start hook that adds context about the Well plugin and its financial-data connection.

In plain words
What is it for?
Use it to tell users how to authenticate Well through the MCP connection when they ask about Well invoices, transactions, companies, contacts, or ledger data.
Why use it?
It gives the agent connection guidance when relevant without displaying it during unrelated work.

Hook

340 +1 25d ago A scan tokens not measured original MIT
View the source file WellApp-ai/Well
Install

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.

agentmods
npx agentmods add hooks/wellapp-ai/well/session-start
Clone the repo
git clone --depth 1 https://github.com/WellApp-ai/Well
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

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 2d 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.

plugins/well/hooks/hooks.json · 12 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "printf '%s' '{\"hookSpecificOutput\":{\"hookEventName\":\"SessionStart\",\"additionalContext\":\"The Well plugin is installed and bundles the well MCP server (financial data). If the user asks about their Well invoices/transactions/ledger and the well_* tools are not connected, guide them with the /well:connect skill: run /mcp, select well, Authenticate (browser sign-in, no API key). Do not surface this unless relevant.\"}}'"
        }
      ]
    }
  ]
}
Changes

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.

  1. 2d ago First seen · 12 lines scan A d8969a56d45b

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository WellApp-ai/Well (340 stars, last pushed 25d 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.

Backend and APIsProductivityaiapiautomationfinopsinvoiceinvoice-extraction
Related

Other hooks, from other repositories

PreToolUse

Runs before the agent uses a tool for Edit tool calls, running echo 'REMINDER: Did you Read this file in the current contex. From kaltura/kaltura-agents-api-guides.

kaltura/kaltura-agents-api-guides · not measured

PostToolUse

Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.

supabase/supabase · not measured

SessionStart

Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.

google-gemini/gemini-cli · not measured

SessionStart

Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.

supabase/supabase · not measured

PreToolUse

Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.

apache/superset · not measured

PreToolUse

Runs before the agent uses a tool, executing pre-write.sh and pre-bash.sh (2 commands). From anthropics/claude-cookbooks.

anthropics/claude-cookbooks · not measured