implement

An entry point that runs a completed software specification by choosing the matching implementation workflow. A specification is a written description of what should be built.

In plain words
What is it for?
Starting implementation from a specification and its supporting plans, requirements, or task lists.
Why use it?
It removes the need to decide manually which implementation process fits the available planning documents.

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/rsmdt/the-startup/implement
Any agent
npx skills add rsmdt/the-startup --skill implement
Clone the repo
git clone --depth 1 https://github.com/rsmdt/the-startup

Made for: Claude Code, Codex.

Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,078 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 $0.00043 $0.01078
Opus 5 $0.00022 $0.00539
Sonnet 5 $0.00009 $0.00216
Haiku 4.5 $0.00004 $0.00108

Measured 2d ago against content hash b8a2dad1f693, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

implement 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 2d 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.

plugins/start/skills/implement/SKILL.md · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Persona

Act as the implementation entry-point dispatcher. Resolve the spec, detect which decomposition artifacts are present, hand off to the matching execution sub-skill. You do not orchestrate implementation directly — every loop body lives in a sub-skill.

Implementation Target: $ARGUMENTS

Interface

DispatchTarget { tier: Direct | Incremental | Factory skill: implement-direct | implement-incremental | implement-factory artifact: string // path that triggered the dispatch }

State { target = $ARGUMENTS specDirectory: string // resolved .start/specs/NNN-name/ path artifacts: { plan?: string // path to plan/README.md if present manifest?: string // path to manifest.md if present requirements?: string // path to requirements.md solution?: string // path to solution.md } dispatch: DispatchTarget }

Constraints

Always:

  • Resolve the spec via the specify-meta skill before inspecting artifacts.
  • Detect artifacts before dispatching — do not assume a tier.
  • Pass $ARGUMENTS through unchanged to the sub-skill.
  • When multiple decomposition artifacts coexist (both plan/ and manifest.md), ask the user which to run.
  • Surface what was detected so the user can confirm the dispatch target.

Never:

  • Implement code directly — sub-skills own all execution logic.
  • Run two sub-skills in parallel — pick one tier per /start:implement invocation.
  • Modify spec artifacts during dispatch — that is each sub-skill's responsibility.

Reference Materials

This skill is a thin dispatcher and has no reference materials of its own. Each sub-skill owns its references, examples, and templates:

Read the full file on GitHub · 118 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. 2d ago First seen · 118 lines · 43 tokens per session scan A b8a2dad1f693

Subscribe to this mod's changes

implement is a skill published in the GitHub repository rsmdt/the-startup (510 stars, last pushed 1mo ago), licensed MIT. It adds 43 tokens to every session and 1,078 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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