fabled

fabled is a skill for Claude Code, Codex from 5kahoisaac/skillless. It costs 171 tokens per session (3,984 once invoked), scanned A, original, MIT.

A six-phase process for turning one build request into a complete, runnable result. It emphasises understanding the request, deciding the scope, designing first, avoiding placeholders, and checking the result.

In plain words
What is it for?
Use it for substantial one-prompt build requests that need complete files and verification against the original requirements.
Why use it?
It reduces the risk of receiving an incomplete project when asking an agent to build an app, script, site, game, bot, or pipeline.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

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/5kahoisaac/skillless/fabled
Any agent
npx skills add 5kahoisaac/skillless --skill fabled
Clone the repo
git clone --depth 1 https://github.com/5kahoisaac/skillless

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 fabled

README.md
[![agentmods](https://agentmods.dev/badge/skills/5kahoisaac/skillless/fabled.svg)](https://agentmods.dev/skills/5kahoisaac/skillless/fabled)
Your own site
<a href="https://agentmods.dev/skills/5kahoisaac/skillless/fabled"><img src="https://agentmods.dev/badge/skills/5kahoisaac/skillless/fabled.svg" alt="Measured on agentmods" height="20"></a>
Per session 171 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,984 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00171 $0.03984
Opus 5 $0.00086 $0.01992
Sonnet 5 $0.00034 $0.00797
Haiku 4.5 $0.00017 $0.00398

Measured 5d ago against content hash 155e6bd4d7be, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

fabled scanned grade A with 1 finding 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 5d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/check.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

tracker, e.g. `curl -s https://www.demandsphere.com/research/demandsphere-radar/ai-frontier-model-tracker/api.json`,
skills/fabled/SKILL.md · 264 lines

How it starts

The opening of the file, as written. The whole thing — 264 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fabled

Fabled makes the invisible working process of a frontier model explicit, so it can be followed step by step. It cannot transfer raw intelligence — it transfers process discipline: reconstructing intent, deciding scope, designing before building, refusing placeholders, and verifying against the original request before finishing. Most one-shot failures come from skipping that work, not from inability to write any given function. Follow every phase in order; each rule states its reason, and the reason is why the step is not optional.

Hard rules — non-negotiable

  1. Complete files only. Every file is written in full, top to bottom. (Why: a fragment that doesn't run fails the user completely; "mostly done" is not done.)
  2. Banned strings. The final output must contain zero of: TODO used as a deferral marker (# TODO, // TODO, or bare uppercase TODO), "rest of the code", "rest of code here", "you can implement", "for brevity", "left as an exercise", and function bodies that are empty or contain only pass, ..., or a not-implemented error. (Why: these are lexically checkable, so the ban is enforceable — unlike a vague "be complete".) Ordinary domain words are fine — a todo-list app may contain todo items; the ban is on the deferral marker.
  3. Never ask. Assume and record. Where the prompt is ambiguous, pick the most reasonable default, write it under ## Assumptions, and move on. (Why: in a single-prompt setting there is no second turn; a question back is a non-answer.)
  4. Verify before responding. Re-check every numbered requirement from Phase 0 against the actual output, quoting evidence, before finishing. (Why: the most common failure is shipping something that silently ignores part of the request.)
  5. Fill the output template below, in order. (Why: the structure forces the phases to actually happen.)

Calibrate rigor — objective signals only

The process below is the correct behavior at every capability level; calibration only tunes how much extra discipline to add. Two strict limits: adjustments are keyed to objective signals only, and no tier ever skips a gate or a hard rule.

Read the full file on GitHub · 264 lines

Files

What ships with it

6 files 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. 5d ago First seen · 264 lines · 171 tokens per session scan A 155e6bd4d7be

Subscribe to this mod's changes

fabled is a skill published in the GitHub repository 5kahoisaac/skillless (4 stars, last pushed 1mo ago), licensed MIT. It adds 171 tokens to every session and 3,984 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.