SessionStart

SessionStart is a hook for Claude Code from Dhananjay625/dev-workflow. Its token cost is not measured, scanned A, original, MIT.

A session-start hook that runs a shell command when a coding session begins. The command displays development-workflow rules and may show saved project context from CHANGELOG.md.

In plain words
What is it for?
Use it to initialize session instructions, read the current-state block and recent changelog entries, and identify projects that need a resumable context section.
Why use it?
It reminds the agent to record changes, preserve resumable session notes, and follow the project's workflow at the start of work. It can also reveal whether the required changelog section is missing.

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 dev-workflow plugin — 2 skills, 3 commands, 10 agents, 4 hooks shipped together

One of 4 entries in hooks.json upstream. Installing this one merges just its entry into your config; the other 3 are separate, each on its own page.

Good fit Use it to initialize session instructions, read the current-state block and recent changelog entries, and identify projects that need a resumable context section.

Compare 6 hooks from other repositories ↓
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 Dhananjay625/dev-workflow
Claude Code
/plugin install dev-workflow

Made for: Claude Code.

Or install dev-workflow, the plugin that ships this one along with the rest of its 2 skills, 3 commands, 10 agents, 4 hooks.

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/dhananjay625/dev-workflow/session-start/github.svg)](https://agentmods.dev/hooks/dhananjay625/dev-workflow/session-start)
Your own site
<a href="https://agentmods.dev/hooks/dhananjay625/dev-workflow/session-start"><img src="https://agentmods.dev/badge/hooks/dhananjay625/dev-workflow/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.

agentmods 80×15 button for SessionStart

Your own site · 80×15
<a href="https://agentmods.dev/hooks/dhananjay625/dev-workflow/session-start"><img src="https://agentmods.dev/badge/hooks/dhananjay625/dev-workflow/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 2mo 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": "echo '[dev-workflow] Session rules: (1) Log every change to the project CHANGELOG.md in the same turn (file:line - before->after - why - verified how). (2) Before this session ends, even if blocked/interrupted, rewrite the \"## Current state\" block so a fresh session can resume from it alone. (3) For non-trivial tasks apply the workflow skill.'; if [ -f CHANGELOG.md ]; then if grep -q '^## Current state' CHANGELOG.md; then echo '--- RESUME CONTEXT (CHANGELOG.md) ---'; awk '/^## Current state/{f=1} /^---$/{f=0} f' CHANGELOG.md; echo '--- Last 3 entries ---'; L=$(grep -n '^### ' CHANGELOG.md | tail -3 | head -1 | cut -d: -f1); [ -n \"$L\" ] && tail -n +$L CHANGELOG.md | head -40; else echo \"[dev-workflow] CHANGELOG.md exists here but has NO '## Current state' block. PREPEND the block (format: ${CLAUDE_PLUGIN_ROOT}/templates/CHANGELOG.template.md) above the existing content, filled from the repo's actual state. Do NOT rewrite or truncate history.\"; fi; else FOUND=$(find . -maxdepth 3 -name CHANGELOG.md -not -path '*/node_modules/*' -not -path '*/.git/*' -not -path '*/vendor/*' 2>/dev/null | head -3); if [ -n \"$FOUND\" ]; then echo \"[dev-workflow] No CHANGELOG.md at this session root, but found existing changelog(s):\"; echo \"$FOUND\"; echo \"The project's cross-session memory almost certainly lives there. Use the changelog in the directory containing the files you will edit. Do NOT create a second changelog at this root - that would split the project's memory.\"; else echo \"[dev-workflow] No CHANGELOG.md found within 3 levels of this session root. If your work targets a project directory deeper than that, check it first. Only if the project you are editing truly has none: create one there from ${CLAUDE_PLUGIN_ROOT}/templates/CHANGELOG.template.md before other work.\"; fi; fi; exit 0"
        }
      ]
    }
  ]
}
Same file

What else hooks.json configures

This page is one entry in a file that holds 4. 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.

  1. 2mo ago First seen · 12 lines scan A e9397e87f60f

Subscribe to this mod's changes

SessionStart is a hook published in the GitHub repository Dhananjay625/dev-workflow (3 stars, last pushed 1mo 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.