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 skills add skillmds/skillmd --skill pddgit clone --depth 1 https://github.com/skillmds/skillmdWrote 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/skillmds/skillmd/pdd)<a href="https://agentmods.dev/skills/skillmds/skillmd/pdd"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/pdd/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/skillmds/skillmd/pdd"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/pdd.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 | $0.00034 | $0.01367 |
| Opus 5.5 | $0.00014 | $0.00547 |
| Sonnet 5.5 | $0.00007 | $0.00273 |
| Haiku 4.5 | $0.00003 | $0.00137 |
Grade A, and why
pdd 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 1mo 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.
This is a copy
89% identical to pdd — 28 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 148 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Prompt-Driven Development
Overview
Transform a rough idea into a detailed design with an implementation plan. The process is iterative: clarify requirements, research, design, plan — moving between phases as needed.
Important Notes
These rules apply across ALL steps:
- User-driven flow: Never proceed to the next step without explicit user confirmation. At each transition, ask the user what they want to do next.
- Iterative: The user can move between requirements clarification and research at any time. Always offer this option at phase transitions.
- Record as you go: Append questions, answers, and findings to project files in real time — don't batch-write at the end.
- Mermaid diagrams: Include diagrams for architectures, data flows, and component relationships in research and design documents.
- Sources: Cite references and links in research documents when based on external materials.
Parameters
- rough_idea (required): The initial concept or idea to develop
- project_dir (optional, default:
specs/{task_name}/): Base directory for all artifacts.{task_name}is derived as kebab-case from the idea (e.g., "build a rate limiter" →rate-limiter). Aligns with Ralph's spec-driven pipeline.
Constraints:
- You MUST ask for all required parameters upfront in a single prompt
- You MUST support multiple input methods: direct text, file path, URL
- You MUST derive
task_namefrom the rough idea as kebab-case - You MUST NOT overwrite an existing project directory — ask for a new path if it already has contents
Steps
1. Create Project Structure
Create the directory and initial files:
{project_dir}/rough-idea.md— the provided rough idea{project_dir}/requirements.md— Q&A record (initially empty){project_dir}/research/— directory for research notes
Inform the user the structure feeds into Ralph's spec-driven presets.
2. Initial Process Planning
Ask the user their preferred starting point:
- Requirements clarification (default)
- Preliminary research on specific topics
- Provide additional context first
What ships with it
1 file beside SKILL.md 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.
- 1mo ago First seen · 148 lines · 34 tokens per session scan A eea31f2464e2
pdd is a skill published in the GitHub repository skillmds/skillmd (143 stars, last pushed 4d ago), licensed MIT. It adds 34 tokens to every session and 1,367 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to pdd, differing in 28 lines, and is treated as a copy.
pdd compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| pddskillmds/skillmd | Skill | 143 | 4d ago | MIT | A | 34 | Claude Code |
| sloplessberelevant-ai/slopless | Skill | 339 | 3d ago | MIT | A | 40 | Claude Code, Codex |
| suikonwiizo/suiko | Skill | 115 | yesterday | MIT | A | 192 | Codex |
| poly-lint-and-formatGoldziher/poly | Skill | 20 | today | MIT | A | 42 | Claude Code |
| poly-orchestratorGoldziher/poly | Skill | 20 | today | MIT | A | 43 | Claude Code |
| poly-mcpGoldziher/poly | Skill | 20 | today | MIT | A | 38 | Claude Code |
| poly-tiers-and-scopeGoldziher/poly | Skill | 20 | today | MIT | A | 60 | Claude Code |