turnstile-spec

turnstile-spec is a skill for Claude Code, Codex from febradc-github/turnstile. It costs 43 tokens per session (796 once invoked), scanned A, original, MIT.

A workflow that turns an approved design document into a checkable specification, then marks the work item ready after explicit approval.

In plain words
What is it for?
Use it to find a design item, check related notes, create its specification, request approval, and update the project backlog.
Why use it?
It closes the gap between agreeing on an idea and having clear criteria that can be tested or reviewed.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the turnstile plugin — 24 skills, 23 commands, 5 agents, 3 hooks, 1 MCP server shipped together

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/febradc-github/turnstile/turnstile-spec
Any agent
npx skills add febradc-github/turnstile --skill turnstile-spec
Clone the repo
git clone --depth 1 https://github.com/febradc-github/turnstile

Made for: Claude Code, Codex.

Or install turnstile, the plugin that ships this one along with the rest of its 24 skills, 23 commands, 5 agents, 3 hooks, 1 MCP server.

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 turnstile-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/febradc-github/turnstile/turnstile-spec.svg)](https://agentmods.dev/skills/febradc-github/turnstile/turnstile-spec)
Your own site
<a href="https://agentmods.dev/skills/febradc-github/turnstile/turnstile-spec"><img src="https://agentmods.dev/badge/skills/febradc-github/turnstile/turnstile-spec.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 796 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 $0.00796
Opus 5 $0.00022 $0.00398
Sonnet 5 $0.00009 $0.00159
Haiku 4.5 $0.00004 $0.00080

Measured 3d ago against content hash cd73ac6a301c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

turnstile-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 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.

skills/turnstile-spec/SKILL.md · 33 lines

How it starts

The opening of the file, as written. The whole thing — 33 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spec

Process

  1. Look up <id> (from $ARGUMENTS) in turnstile/backlog.yml and apply the refusals above.
  2. Read the item's design doc: turnstile/designs/DS-<n>.md (<n> from <id> = C-<n>), falling back to legacy names (turnstile/designs/<id>-*-design.md, turnstile/designs/<id>.md).
  3. Search the vault for notes related to <id>'s topic. Surface anything relevant, including conflicts, before continuing.
  4. If a spec file for <id> already exists (status is still idea, so it can only be a draft from an abandoned prior session), warn the user and ask whether to overwrite or keep it. Never overwrite silently.
  5. Write turnstile/specs/SP-<n>.md per the template reference.
  6. Present the spec content and ask for explicit approval. Revise and re-present until approved.
  7. Once approved, update the item in turnstile/backlog.yml: status: ready, updated = today. The spec file is the sole home of the criteria -- never copy them into YAML (remove a legacy acceptance_criteria field if present). Update the item's note (US-<n>/TK-<n>): add - Spec: [[SP-<n>]], add the spec to related, set updated to today. (A legacy item with no note: create one per the turnstile-brain item-note format.) Confirm every added [[wikilink]] resolves (list_unresolved_links).
  8. Tell the user the item is ready for /turnstile:sprint-plan.

Read the full file on GitHub · 33 lines

Files

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.

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 · 33 lines · 43 tokens per session scan A cd73ac6a301c

Subscribe to this mod's changes

turnstile-spec is a skill published in the GitHub repository febradc-github/turnstile (1 stars, last pushed 1mo ago), licensed MIT. It adds 43 tokens to every session and 796 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 2026-08-31.

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