skill-027

skill-027 is a skill for Claude Code, Codex from legendtkl/agentic-skill-router. It costs 21 tokens per session (244 once invoked), scanned A, original, MIT.

A skill that checks whether a feature specification is complete before implementation begins.

In plain words
What is it for?
Use it to find unfinished markers, verify specification rules, and confirm that the feature is ready for implementation.
Why use it?
It exposes missing inputs, outputs, error cases, ambiguities, and acceptance scenarios before a large implementation starts.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md.

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/legendtkl/agentic-skill-router/skill-027
Any agent
npx skills add legendtkl/agentic-skill-router --skill skill-027
Clone the repo
git clone --depth 1 https://github.com/legendtkl/agentic-skill-router

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 skill-027

README.md
[![agentmods](https://agentmods.dev/badge/skills/legendtkl/agentic-skill-router/skill-027.svg)](https://agentmods.dev/skills/legendtkl/agentic-skill-router/skill-027)
Your own site
<a href="https://agentmods.dev/skills/legendtkl/agentic-skill-router/skill-027"><img src="https://agentmods.dev/badge/skills/legendtkl/agentic-skill-router/skill-027.svg" alt="Measured on agentmods" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 244 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 5.1 $0.00021 $0.00244
Opus 5 $0.00010 $0.00122
Sonnet 5 $0.00004 $0.00049
Haiku 4.5 $0.00002 $0.00024

Measured 6d ago against content hash 2a79240bc01f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

skill-027 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 6d 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.

experiments/dci-compare/skillrouter-skills/skill-027/SKILL.md · 39 lines

What it actually says

Big Bang 80/20: Specification Closure

Core Concept

Specification closure is the gate before EPIC 9 fan-out.

No implementation begins without closure verification.

Closure Checklist

A specification is closed when:

  • All inputs characterized (domain, constraints, edge cases)
  • All outputs specified (behavior, invariants, success criteria)
  • All errors enumerated (what happens when things fail)
  • All ambiguities resolved (no TBD, TODO, undefined)
  • All user stories have acceptance scenarios
  • SHACL validation passes

Quick Validation

# Check for incomplete markers
grep -r "TBD\|TODO\|FIXME\|undefined" .specify/

# Validate SHACL conformance
cargo make speckit-validate

Reference

See CLAUDE.md sections:

  • Three Paradigms (Big Bang 80/20)
  • When to Use EPIC 9
  • Agents: bb80-specification-validator
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. 6d ago First seen · 39 lines · 21 tokens per session scan A 2a79240bc01f

Subscribe to this mod's changes

skill-027 is a skill published in the GitHub repository legendtkl/agentic-skill-router (5 stars, last pushed 3mo ago), licensed MIT. It adds 21 tokens to every session and 244 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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