RyanAlberts/best-of-Agent-Harnesses
🏆 Ranked list of 167 AI agent harnesses, plus copy-paste templates (AGENTS.md, safe Claude Code settings, a minimal harness) and step-by-step playbooks. MCP server, llms.txt & JSON. Rescored weekly.
ARCHETYPE
Fort Knox
Deny lists, pre-tool hooks, sandboxing. Nothing touches prod without a signature.
GUARDRAILS
5/5
Blocks destructive commands · Protects secrets · Pre-tool screening hook · No YOLO mode · Sandbox or ask-first rules · details
Copy this rig
# review before running: this installs third-party code
$ npx degit RyanAlberts/best-of-Agent-Harnesses/templates/claude-code-safe-settings/.claude ./rig-best-of-agent-harnesses # inspect, then merge into .claude/ MCP servers are added to Claude Code at local scope; env vars are shown as YOUR_… placeholders — we never store values. Files are fetched with degit into a separate folder so you can review before merging.
$ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/agents-md-checker .claude/skills/agents-md-checker $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/claim-check .claude/skills/claim-check $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/guardrail-tester .claude/skills/guardrail-tester $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/harness-test-drive .claude/skills/harness-test-drive $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/regression-finder .claude/skills/regression-finder $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/rules-to-guards .claude/skills/rules-to-guards $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/runaway-guard .claude/skills/runaway-guard $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/sandbox-check .claude/skills/sandbox-check $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/session-waste-report .claude/skills/session-waste-report $ npx degit RyanAlberts/best-of-Agent-Harnesses/skills/tool-design-checker .claude/skills/tool-design-checker
$ curl -fsSL --create-dirs -o .claude/agents/harness-radar.md https://raw.githubusercontent.com/RyanAlberts/best-of-Agent-Harnesses/main/agents/harness-radar.md $ curl -fsSL --create-dirs -o .claude/agents/harness-scout.md https://raw.githubusercontent.com/RyanAlberts/best-of-Agent-Harnesses/main/agents/harness-scout.md $ curl -fsSL --create-dirs -o .claude/agents/stack-auditor.md https://raw.githubusercontent.com/RyanAlberts/best-of-Agent-Harnesses/main/agents/stack-auditor.md
Merge into .claude/settings.json (project) or ~/.claude/settings.json (user). Hook commands reference scripts in the source repo — copy those too.
{
"permissions": {
"deny": [
"Read(.env)",
"Read(.env.*)",
"Read(**/*.pem)",
"Read(**/*.key)",
"Read(**/id_rsa*)",
"Read(**/id_ed25519*)",
"Read(./secrets/**)",
"Read(~/.ssh/**)",
"Read(~/.aws/**)",
"Edit(.env)",
"Edit(.env.*)",
"Edit(.git/hooks/**)",
"Edit(.claude/settings.json)",
"Edit(.claude/settings.local.json)",
"Edit(.claude/hooks/**)",
"Edit(~/.zshrc)",
"Edit(~/.bashrc)",
"Edit(~/.profile)",
"Edit(~/Library/LaunchAgents/**)",
"Bash(git push --force *)",
"Bash(git push -f *)",
"Bash(git reset --hard *)",
"Bash(git clean *)",
"Bash(rm -rf *)",
"Bash(sudo *)"
],
"ask": [
"Bash(git push *)",
"Bash(git commit *)",
"Bash(npm publish *)",
"Bash(docker *)",
"Bash(kubectl *)",
"Bash(terraform *)"
]
},
"hooks": {
"PreToolUse": [
{
"matcher": "Bash",
"hooks": [
{
"type": "command",
"command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/guard.sh"
}
]
}
]
}
} Skills (10)
agents-md-checkerclaim-checkguardrail-testerharness-test-driveregression-finderrules-to-guardsrunaway-guardsandbox-checksession-waste-reporttool-design-checker
Subagents (3)
| harness-radar | Weekly movement briefing on the AI agent harness space — what climbed, what entered the radar, what died — from the best-of-Agent-Harnesses dataset, which rescores itself every week. Use on a schedule |
| harness-scout | Picks the right AI agent harness for a described task or project. Use when the user asks "what harness/framework/agent tool should I use", compares agent frameworks, or starts an agent project without |
| stack-auditor | Audits a codebase's AI agent stack against the live best-of-Agent-Harnesses dataset — finds which harnesses the repo uses, flags dead or graveyarded ones, and names live replacements. Use when the use |
Hooks (1)
| event | matcher | runs |
|---|---|---|
| PreToolUse | Bash | "$CLAUDE_PROJECT_DIR"/.claude/hooks/guard.sh |
Cursor rules (1)
git-author · always
Permissions
deny (25)
Read(.env)
Read(.env.*)
Read(**/*.pem)
Read(**/*.key)
Read(**/id_rsa*)
Read(**/id_ed25519*)
Read(./secrets/**)
Read(~/.ssh/**)
Read(~/.aws/**)
Edit(.env)
Edit(.env.*)
Edit(.git/hooks/**)
Edit(.claude/settings.json)
Edit(.claude/settings.local.json)
Edit(.claude/hooks/**)
Edit(~/.zshrc)
Edit(~/.bashrc)
Edit(~/.profile)
Edit(~/Library/LaunchAgents/**)
Bash(git push --force *)
Bash(git push -f *)
Bash(git reset --hard *)
Bash(git clean *)
Bash(rm -rf *)
Bash(sudo *)
ask (6)
Bash(git push *)
Bash(git commit *)
Bash(npm publish *)
Bash(docker *)
Bash(kubectl *)
Bash(terraform *)
allow (4)
Bash(git status *)
Bash(git diff *)
Bash(git log *)
Bash(git show *)
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