An entry point for the SkySynth system-building workflow. It directs a coding agent to use role-specific instructions for specification, planning, implementation, evaluation, criticism, and auditing.

Use it when building, synthesizing, or specializing a system from a workload or formal specification.

It gives the agent a repeatable process for moving from a request to a tested or formally checked system.

skysynth — Skill for Claude Code by skydiscover-ai/skydiscover

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 skydiscover-ai/skydiscover --skill skysynth

Clone the repo

git clone --depth 1 https://github.com/skydiscover-ai/skydiscover

Made for: Claude Code.

Or install skysynth, the plugin that ships this one along with the rest of its 2 skills, 1 command, 2 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/skydiscover-ai/skydiscover/skysynth/github.svg)](https://agentmods.dev/skills/skydiscover-ai/skydiscover/skysynth)

Your own site

<a href="https://agentmods.dev/skills/skydiscover-ai/skydiscover/skysynth"><img src="https://agentmods.dev/badge/skills/skydiscover-ai/skydiscover/skysynth/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/skydiscover-ai/skydiscover/skysynth"><img src="https://agentmods.dev/badge/skills/skydiscover-ai/skydiscover/skysynth.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 94 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 277 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00094	$0.00277
Opus 5.5	$0.00038	$0.00111
Sonnet 5.5	$0.00019	$0.00055
Haiku 4.5	$0.00009	$0.00028

Measured 1mo ago against content hash e7fa7c95879e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skysynth 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 1mo 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.

skydiscover/synthesize/workflow/adapters/codex/skills/skysynth/SKILL.md · 22 lines

What it actually says

SkySynth: Codex Entry Point

This file is a thin entry point. The workflow lives at the plugin root, four directories up (../../../../SKILL.md, beside agents/, references/, and scripts/).

Read the plugin root's SKILL.md: the lead workflow, its rules, and its references.
Follow it as the lead, with the user's request as the system to synthesize.

Role agents: the briefs are in the plugin root's agents/<phase>/. If this project has .codex/agents/*.toml installed (skydiscover init --agent codex), run roles as subagents by name; otherwise adopt each role's brief from agents/<phase>/<role>.md when its phase begins.

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.

1mo ago First seen · 22 lines · 94 tokens per session scan A e7fa7c95879e

Subscribe to this mod's changes

skysynth is a skill published in the GitHub repository skydiscover-ai/skydiscover (745 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 94 tokens to every session and 277 once invoked, about $0.0004 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 2026-09-12.

Building agents Testing

skysynth next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
skysynthskydiscover-ai/skydiscover	Skill	745	1mo ago	Apache-2.0	A	94	Claude Code
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code