What is SessionStart?

A session-start hook that checks whether the repository has a code knowledge graph and prints a short status message. A hook is an automatic action that runs when a specified event occurs.

Use it to announce graph availability at the start of a session and suggest relevant code-review graph queries or an initial graph build.

It tells the coding agent whether graph-based code information is available before work begins. If it is available, the message points the agent toward graph queries instead of repeated manual searches.

SessionStart — Hook for Claude Code by n24q02m

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.

Clone the repo

git clone --depth 1 https://github.com/n24q02m/better-code-review-graph

Made for: Claude Code.

Or install better-code-review-graph, the plugin that ships this one along with the rest of its 7 skills, 3 hooks, 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.

README.md

[![agentmods](https://agentmods.dev/badge/hooks/n24q02m/better-code-review-graph/session-start/github.svg)](https://agentmods.dev/hooks/n24q02m/better-code-review-graph/session-start)

Your own site

<a href="https://agentmods.dev/hooks/n24q02m/better-code-review-graph/session-start"><img src="https://agentmods.dev/badge/hooks/n24q02m/better-code-review-graph/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.

Your own site · 80×15

<a href="https://agentmods.dev/hooks/n24q02m/better-code-review-graph/session-start"><img src="https://agentmods.dev/badge/hooks/n24q02m/better-code-review-graph/session-start.svg" alt="Reviewed on agentmods" width="80" 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. A grade says what 26 rules found in the file — not that it is safe.

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 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.

hooks/hooks.json · 12 lines

What it actually says

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "python -c \"import os;print('[better-code-review-graph] Knowledge graph available. Prefer crg MCP tools (semantic_search_nodes, query_graph callers_of/callees_of/imports_of/importers_of/children_of/tests_for/inheritors_of/file_summary, get_impact_radius, get_review_context) before manual Grep/Glob/Read. Saves tokens.' if os.path.exists(os.path.join('.better-code-review-graph','graph.db')) else '[better-code-review-graph] No knowledge graph found. Use the graph tool action=build to enable graph-powered queries.')\""
        }
      ]
    }
  ]
}

Same file

What else `hooks.json` configures

This page is one entry in a file that holds 3. Installing the file brings all of them; each is measured and scanned on its own page.

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.

1mo ago Changed 4b35c8d21bbc
2mo ago First seen · 12 lines scan A 68237b851115

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository n24q02m/better-code-review-graph (67 stars, last pushed 1mo ago), licensed Apache-2.0. 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.

Claude Code Code review antigravity codex copilot gemini-cli

SessionStart next to 6 hooks from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
SessionStartn24q02m/better-code-review-graph	Hook	67	1mo ago	Apache-2.0	A	—	Claude Code
BeforeToolJamkris/everything-gemini-code	Hook	93	5mo ago	MIT	A	—	Claude Code
SessionStartJamkris/everything-gemini-code	Hook	93	5mo ago	MIT	A	—	Claude Code
PostToolUsesupabase/supabase	Hook	115k	yesterday	Apache-2.0	A	—	Claude Code
SessionStartsupabase/supabase	Hook	115k	yesterday	Apache-2.0	A	—	Claude Code
SessionStartgoogle-gemini/gemini-cli	Hook	109k	yesterday	Apache-2.0	A	—	Claude Code
PreToolUseapache/superset	Hook	75k	yesterday	Apache-2.0	A	—	Claude Code

SessionStart