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.
/plugin marketplace add jasonm4130/claude-skillsnpx agentmods add plugins/jasonm4130/claude-skills/subagent-driven-developmentgit clone --depth 1 https://github.com/jasonm4130/claude-skillsGrade A, and why
subagent-driven-development 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 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
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
{
"name": "subagent-driven-development",
"description": "Deterministic, workflow-driven subagent development loop: plan -> confirm -> background Workflow runs per-task implement/review/fix with tiered models in deps-driven parallel waves (per-task worktrees + per-wave merge gate), ponytail anti-over-engineering discipline, deterministic BLOCKED escalation and oscillation halt, then an Opus whole-branch final review. Replaces the model-driven superpowers post-plan suite.",
"version": "0.12.0",
"author": {
"name": "Jason Matthew",
"email": "[email protected]"
},
"homepage": "https://github.com/jasonm4130/claude-skills",
"repository": "https://github.com/jasonm4130/claude-skills",
"license": "MIT",
"keywords": [
"subagent-driven-development",
"sdd",
"workflow",
"tdd",
"code-review",
"ponytail",
"model-tiering"
]
}
What it installs
The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 102 tokens a session between them. Each is measured on its own page, and each can be installed alone.
What ships with it
1 file beside plugin.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 3d ago First seen · 22 lines scan A 99b23287f178
subagent-driven-development is a plugin published in the GitHub repository jasonm4130/claude-skills (5 stars, last pushed 3d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.
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