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.
npx agentmods add skills/mifunedev/openharness/ralphnpx skills add mifunedev/openharness --skill ralphgit clone --depth 1 https://github.com/mifunedev/openharnessWrote 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/mifunedev/openharness/ralph)<a href="https://agentmods.dev/skills/mifunedev/openharness/ralph"><img src="https://agentmods.dev/badge/skills/mifunedev/openharness/ralph.svg" alt="Measured on agentmods" 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 | $0.00064 | $0.02197 |
| Opus 5 | $0.00032 | $0.01099 |
| Sonnet 5 | $0.00013 | $0.00439 |
| Haiku 4.5 | $0.00006 | $0.00220 |
Grade A, and why
ralph 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 4d 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 — 302 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ralph PRD Converter
Converts existing PRDs to the prd.json format that Ralph uses for autonomous execution.
The Job
Convert .oh/tasks/<short-desc>/prd.md to .oh/tasks/<short-desc>/prd.json in the same folder.
Required arguments:
- Folder path (positional, e.g.
.oh/tasks/install-prereq-detection/). The folder name is<short-desc>. --issue <N>— GitHub issue number this PRD addresses. Required. The branch name embeds this.--prefix <type>— branch prefix per.claude/skills/git/SKILL.md. One offeat | bug | task | audit | skill | agent. Default:feat.
branchName in the produced JSON follows .claude/skills/git/SKILL.md:
<prefix>/<issue#>-<short-desc>
Example: folder .oh/tasks/install-prereq-detection/ + --issue 175 + --prefix task → branchName: "task/175-install-prereq-detection".
If --issue is missing, hard-fail with: "issue number required — open the GitHub issue first per .claude/skills/git/SKILL.md and re-run with --issue <N>." This matches the project's "issue first, then branch" workflow.
The folder name IS the feature name — do not re-derive it from branchName or anywhere else.
Output Format
{
"schemaVersion": 1,
"project": "[Project Name]",
"branchName": "<prefix>/<issue#>-<short-desc>",
"description": "[Feature description from PRD title/intro]",
"userStories": [
{
"id": "US-001",
"title": "[Story title]",
"description": "As a [user], I want [feature] so that [benefit]",
"acceptanceCriteria": [
"Criterion 1",
"Criterion 2",
"Typecheck passes"
],
"priority": 1,
"passes": false,
"notes": ""
}
]
}
Story Size: The Number One Rule
Each story must be completable in ONE Ralph iteration (one context window).
Ralph spawns a fresh Amp instance per iteration with no memory of previous work. If a story is too big, the LLM runs out of context before finishing and produces broken code.
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.
- 4d ago First seen · 302 lines · 64 tokens per session scan A 5afa8b7f5567
ralph is a skill published in the GitHub repository mifunedev/openharness (36 stars, last pushed 4d ago), licensed Apache-2.0. It adds 64 tokens to every session and 2,197 once invoked, about $0.0003 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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