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 jcwleo/oh-no-harness/plugin install oh-no-harnessWrote 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/skills/jcwleo/oh-no-harness/configure-subagents)<a href="https://agentmods.dev/skills/jcwleo/oh-no-harness/configure-subagents"><img src="https://agentmods.dev/badge/skills/jcwleo/oh-no-harness/configure-subagents/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/skills/jcwleo/oh-no-harness/configure-subagents"><img src="https://agentmods.dev/badge/skills/jcwleo/oh-no-harness/configure-subagents.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00048 | $0.04422 |
| Opus 5 | $0.00024 | $0.02211 |
| Sonnet 5 | $0.00010 | $0.00884 |
| Haiku 4.5 | $0.00005 | $0.00442 |
Grade A, and why
configure-subagents 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 367 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Configure Subagents for Claude Code
This generated file is the Claude Code-facing runtime skill document. Claude Code slash commands should read this file directly; maintainers edit the source documents listed below instead.
Generated Runtime Composition
Source order:
../../docs/skill-core/configure-subagents.md../../docs/platforms/claude-code-runtime.md../../docs/platforms/claude-code-configure-subagents.md
The sections below are already composed for this platform. Do not ask the runtime model to load another platform's runtime document or invocation syntax.
Source: docs/skill-core/configure-subagents.md
Configure Subagents
Configure Subagents is a user-invoked setup action. It walks you through choosing
a model and reasoning effort for each of the 9 Oh No Harness Claude Code
subagents, then applies those choices to the installed runtime agent Markdown
so the next Claude Code session dispatches each role with your chosen model and
effort.
This skill is human-invoke-only. It is never auto-invoked by the model: its
frontmatter sets disable-model-invocation: true, and it is intentionally left
out of the SessionStart routing map. Only an explicit
/oh-no-harness:configure-subagents from the user runs it.
It is Claude Code-only: it configures Claude Code subagent frontmatter and
ships no Codex wrapper. It does not change the generator-owned canonical
agents/*.md in the source checkout and never touches Codex custom-agent TOMLs.
Software Development Stage
Configure Subagents is a one-time environment-setup action, not a software development stage. It should not gather requirements, plan, edit project code, debug failures, clean code, or verify completion. It does not invoke workflow skills.
When To Use
Use only when the user explicitly asks to configure, set, or change which model or reasoning effort the Oh No Harness subagents run with. There is no model-driven trigger for this skill; do not use it as part of any automated workflow.
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.
- 11d ago First seen · 367 lines · 48 tokens per session scan A a1ad40fc443d
configure-subagents is a skill published in the GitHub repository jcwleo/oh-no-harness (11 stars, last pushed 1mo ago), licensed MIT. It adds 48 tokens to every session and 4,422 once invoked, about $0.0002 per session on Opus 5. 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.
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