implementation-spec

implementation-spec is a skill for Claude Code from aishajv/claude-everything. It costs 82 tokens per session (1,153 once invoked), scanned A, original, no licence file.

A technical specification for an approved feature, based on reading the existing code and identifying the files, interfaces, data, services, and background jobs that will change.

In plain words
What is it for?
Use it to write or review an implementation-ready plan before coding a feature.
Why use it?
It replaces vague implementation plans with documented changes, failure cases, rollout steps, verification, and known unknowns.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the implementation-spec plugin — 1 skill shipped together

Good fit Use it to write or review an implementation-ready plan before coding a feature.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/aishajv/claude-everything/implementation-spec
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.

Any agent
npx skills add aishajv/claude-everything --skill implementation-spec
Clone the repo
git clone --depth 1 https://github.com/aishajv/claude-everything

Made for: Claude Code.

Or install implementation-spec, the plugin that ships this one along with the rest of its 1 skill.

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-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/aishajv/claude-everything/implementation-spec/github.svg)](https://agentmods.dev/skills/aishajv/claude-everything/implementation-spec)
Your own site
<a href="https://agentmods.dev/skills/aishajv/claude-everything/implementation-spec"><img src="https://agentmods.dev/badge/skills/aishajv/claude-everything/implementation-spec/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.

agentmods 80×15 button for implementation-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/aishajv/claude-everything/implementation-spec"><img src="https://agentmods.dev/badge/skills/aishajv/claude-everything/implementation-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,153 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 5.1 $0.00082 $0.01153
Opus 5.5 $0.00033 $0.00461
Sonnet 5.5 $0.00016 $0.00231
Haiku 4.5 $0.00008 $0.00115

Measured 11d ago against content hash 3524388a456b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

implementation-spec 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.

plugins/implementation-spec/skills/implementation-spec/SKILL.md · 99 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 11d ago First seen · 99 lines · 82 tokens per session scan A 3524388a456b

Subscribe to this mod's changes

implementation-spec is a skill published in the GitHub repository aishajv/claude-everything (7 stars, last pushed yesterday), with no licence file. It adds 82 tokens to every session and 1,153 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-05.

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