Superpowers is a software development methodology for coding agents that guides work from clarifying requirements through design, planning, implementation, testing, and review. It is for developers who want agents to follow a structured, test-focused process using composable skills and subagents.
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.
/plugin marketplace add obra/superpowers/plugin install superpowersWrote 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.
[](https://agentmods.dev/hooks/obra/superpowers/session-start)<a href="https://agentmods.dev/hooks/obra/superpowers/session-start"><img src="https://agentmods.dev/badge/hooks/obra/superpowers/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.
<a href="https://agentmods.dev/hooks/obra/superpowers/session-start"><img src="https://agentmods.dev/badge/hooks/obra/superpowers/session-start.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
Copies of this mod
8 near-identical copies found in the catalogue:
- SessionStart — 100% identical, 0 lines differ
- SessionStart — 100% identical, 0 lines differ
- SessionStart — 100% identical, 0 lines differ
- SessionStart — 86% identical, 1 lines differ
- SessionStart — 86% identical, 1 lines differ
- SessionStart — 86% identical, 1 lines differ
- SessionStart — 86% identical, 6 lines differ
- SessionStart — 86% identical, 1 lines differ
What it actually says
{
"SessionStart": [
{
"matcher": "startup|clear|compact",
"hooks": [
{
"type": "command",
"command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/run-hook.cmd\" session-start",
"shell": "bash",
"async": false
}
]
}
]
}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 First seen · 15 lines scan A 9c4cd5a27fd6
SessionStart is a hook published in the GitHub repository obra/superpowers (299,875 stars, last pushed 6d 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.
Other hooks, from other repositories
PreToolUse
Runs before the agent uses a tool for Bash, mcp__github__create_pull_request and mcp__github__merge_pull_request tool calls, executing validate-pr-creation.sh, validate-local-testing.sh, validate-pr-merge.sh and validate-tests-pass.sh (4 commands). From troykelly/claude-skills.
PostToolUse
Runs after a tool call finishes for Edit, Write, Bash and mcp__github__create_pull_request tool calls, executing security-scan.sh, validate-generated-artifacts.sh, track-test-results.sh and post-pr-creation.sh (4 commands). From troykelly/claude-skills.
SessionStart
Runs when a session starts, executing session-start.sh and check-orchestration-sleep.sh (2 commands). From troykelly/claude-skills.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PostToolUse
Runs after a tool call finishes for Write and Edit tool calls, executing format_and_lint.sh. From supabase/supabase.
SessionStart
Runs when a session starts, executing on-start.js via node. From google-gemini/gemini-cli.