agentmods.dev

SessionStart

SessionStart is a hook for Claude Code from xieyuschen/gopls-mcp. Its token cost is not measured, scanned A, original, BSD-3-Clause.

A session-start hook that runs a shell script when a coding-agent session begins. The script loads context from gopls-mcp, a tool associated with the Go language server.

In plain words
What is it for?
Use it to run on-session-start.sh automatically when a session starts and load gopls-mcp context.
Why use it?
It automates a setup step at the beginning of each session so the agent can load the specified context without a manual command.

Hook for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the plugin plugin — 1 skill, 1 hook, 1 MCP server shipped together

not rated 57 1mo ago A scan tokens not measured original BSD-3-Clause
View the source file xieyuschen/gopls-mcp gopls-mcp.org
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add xieyuschen/gopls-mcp
Claude Code
/plugin install plugin

Made for: Claude Code.

Or install plugin, the plugin that ships this one along with the rest of its 1 skill, 1 hook, 1 MCP server.

Wrote 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.

agentmods badge for SessionStart

README.md
[![agentmods](https://agentmods.dev/badge/hooks/xieyuschen/gopls-mcp/session-start.svg)](https://agentmods.dev/hooks/xieyuschen/gopls-mcp/session-start)
Your own site
<a href="https://agentmods.dev/hooks/xieyuschen/gopls-mcp/session-start"><img src="https://agentmods.dev/badge/hooks/xieyuschen/gopls-mcp/session-start.svg" alt="Measured on agentmods" height="20"></a>
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 6d 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.

plugin/hooks/hooks.json · 13 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "${CLAUDE_PLUGIN_ROOT}/scripts/on_session_start.sh",
          "statusMessage": "Loading gopls-mcp context..."
        }
      ]
    }
  ]
}
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. 6d ago First seen · 13 lines scan A 53e9a1802908

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository xieyuschen/gopls-mcp (57 stars, last pushed 1mo ago), licensed BSD-3-Clause. 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.

ai-agentclaude-codecodexgomcp-server
Related

Other hooks, from other repositories

PreCompact

Runs before the context is compacted, running bd prime. From olgasafonova/productplan-mcp-server.

olgasafonova/productplan-mcp-server · not measured

SessionStart

Runs when a session starts, running bd prime. From olgasafonova/productplan-mcp-server.

olgasafonova/productplan-mcp-server · not measured

SessionStart

Runs when a session starts, running python -m wikimoth.capture.hook SessionStart. From juliangeymonat-jpg/wikimoth.

juliangeymonat-jpg/wikimoth · 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

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