Autoharness is a self-learning skill layer for Claude Code that distills skills from real work sessions, combines overlapping skills, updates them during use, and removes ones that are no longer used. It is for people who want Claude Code to maintain a working library of reusable skills as they work. The catalogue entries provide the hooks, agents, MCP integration, plugin, and skill that make up its workflow.
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 tigerless-labs/autoharness/plugin install autoharnessWrote 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/tigerless-labs/autoharness/pre-tool-use)<a href="https://agentmods.dev/hooks/tigerless-labs/autoharness/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/tigerless-labs/autoharness/pre-tool-use.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
PreToolUse 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 yesterday.
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.
What it actually says
{
"PreToolUse": [
{
"hooks": [
{
"type": "command",
"command": "PYTHONPATH=${CLAUDE_PLUGIN_ROOT}/src python3 -m autoharness.hook.dispatch"
}
]
}
]
}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.
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.
- yesterday Changed · -10 lines 7ca05f4e2fd0
- 6d ago First seen · 22 lines scan A c5168197709f
PreToolUse is a hook published in the GitHub repository tigerless-labs/autoharness (1,532 stars, last pushed today), 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
PostToolUse
Runs after a tool call finishes for Bash, Edit, Write, MultiEdit and NotebookEdit tool calls, running dt hook-post-tool-use 2>/dev/null. From yacb2/domaintome.
SessionStart
Runs when a session starts, running dt hook-session-start 2>/dev/null. From yacb2/domaintome.
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.
SessionStart
Runs when a session starts on startup, executing install_pkgs.sh. From supabase/supabase.
PreToolUse
Runs before the agent uses a tool for Bash tool calls, running an inline shell check. From apache/superset.