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 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.

agentmods

npx agentmods add hooks/n24q02m/better-code-review-graph/session-start

Clone the repo

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

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.

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('.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.')\""
        }
      ]
    }
  ]
}

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.

2d 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 (66 stars, last pushed 2d 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.

antigravity claude-code codex copilot gemini-cli

BeforeTool

Runs on the BeforeTool event for tool == "run_shell_command", tool == "run_shell_command", tool == "run_shell_command" && tool_input.command matches "^\\s*(npm (install, test, i, ci), pnpm (install, test, i), yarn (install, test, add, remove, upgrade), bun (install, test, i, add, remove), cargo build, make, docker…

Jamkris/everything-gemini-code · not measured

SessionStart

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other hooks, from other repositories

BeforeTool

SessionStart

SessionStart

Stop

PostToolUse

SessionStart