implementation-prompt

implementation-prompt is a skill for Claude Code, Codex from DojoGenesis/mcp. It costs 29 tokens per session (2,878 once invoked), scanned A, original, MIT.

A method for turning software specifications into complete instructions for autonomous coding agents. The resulting prompt describes the requested work and the context needed to carry it out.

In plain words
What is it for?
Use it after a specification is finalized, when commissioning an agent to build a feature or change in an existing codebase.
Why use it?
It reduces ambiguity, missing information, repeated questions, and rework when assigning development tasks to an agent.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/dojogenesis/mcp/implementation-prompt
Any agent
npx skills add DojoGenesis/mcp --skill implementation-prompt
Clone the repo
git clone --depth 1 https://github.com/DojoGenesis/mcp

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for implementation-prompt

README.md
[![agentmods](https://agentmods.dev/badge/skills/dojogenesis/mcp/implementation-prompt.svg)](https://agentmods.dev/skills/dojogenesis/mcp/implementation-prompt)
Your own site
<a href="https://agentmods.dev/skills/dojogenesis/mcp/implementation-prompt"><img src="https://agentmods.dev/badge/skills/dojogenesis/mcp/implementation-prompt.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,878 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00029 $0.02878
Opus 5 $0.00015 $0.01439
Sonnet 5 $0.00006 $0.00576
Haiku 4.5 $0.00003 $0.00288

Measured 3d ago against content hash 4865ca0369c8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implementation-prompt 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.

internal/skills/bundled/specification-driven-development/implementation-prompt/SKILL.md · 318 lines

How it starts

The opening of the file, as written. The whole thing — 318 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implementation Prompt Skill

Version: 1.1 Author: Tres Pies Design Purpose: Write clear, comprehensive, and self-contained prompts that enable autonomous implementation agents to execute high-quality work without asking questions.


I. The Philosophy: The Art of Commissioning

A prompt to an autonomous agent is not a command; it is a commission. It is a formal request for a work of craftsmanship. The quality of the commission directly determines the quality of the work. A vague, incomplete, or ambiguous prompt invites confusion, rework, and failure. A clear, comprehensive, and well-grounded prompt is an act of respect for the builder's time and capability.

This skill transforms prompt writing from a hopeful guess into a deliberate and rigorous engineering discipline. By following this structure, we provide the agent with everything it needs to succeed — enabling it to work with precision, autonomy, and a deep understanding of the existing codebase.


II. When to Use This Skill

  • After a specification has been finalized and has passed the pre-implementation checklist
  • When commissioning a new development task to an autonomous implementation agent
  • When breaking down a large specification into smaller, manageable implementation chunks
  • When preparing work for parallel track execution

III. The Prompt Writing Workflow

Step 1: Validate Specification Readiness

Goal: Ensure the specification is complete and implementation-ready before writing prompts.

Actions:

  1. Verify the specification has passed the pre-implementation-checklist (if applicable)
  2. Confirm backend grounding is complete (API contracts, data models, integration points)
  3. Check that all architectural decisions are documented
  4. Verify there are no missing dependencies or unclear requirements
  5. Identify if the work should be split into multiple tracks or sequential chunks

Key Insight: Never write an implementation prompt from an incomplete specification. The prompt quality is directly determined by the specification quality.

Read the full file on GitHub · 318 lines

Changes

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.

  1. 3d ago First seen · 318 lines · 29 tokens per session scan A 4865ca0369c8

Subscribe to this mod's changes

implementation-prompt is a skill published in the GitHub repository DojoGenesis/mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 2,878 once invoked, about $0.0001 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 2026-08-31.

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