synthesis-llm-setup

synthesis-llm-setup is a skill for Claude Code, Codex from synthesisengineering/synthesis-skills. It costs 61 tokens per session (1,685 once invoked), scanned A, original, Apache-2.0.

A setup guide for configuring AI assistants on platforms such as Claude Projects, ChatGPT GPTs, and Gemini Gems. It uses compiled knowledge and instructions stored in a project repository.

In plain words
What is it for?
Setting up an AI assistant with custom instructions and knowledge, compiling platform-specific instruction files, and updating the knowledge index when content changes.
Why use it?
It explains where source knowledge belongs, how platform-specific instructions are compiled, and when the knowledge index should be updated. This reduces confusion when keeping several AI-assistant configurations aligned.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions Gemini CLI.

Part of the synthesis-skills plugin — 63 skills, 4 hooks shipped together

Good fit Setting up an AI assistant with custom instructions and knowledge, compiling platform-specific instruction files, and updating the knowledge index when content changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/synthesisengineering/synthesis-skills/synthesis-llm-setup
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 synthesisengineering/synthesis-skills --skill synthesis-llm-setup
Clone the repo
git clone --depth 1 https://github.com/synthesisengineering/synthesis-skills

Made for: Claude Code, Codex.

Or install synthesis-skills, the plugin that ships this one along with the rest of its 63 skills, 4 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.

agentmods badge for synthesis-llm-setup

README.md
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Your own site
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/synthesisengineering/synthesis-skills/synthesis-llm-setup"><img src="https://agentmods.dev/badge/skills/synthesisengineering/synthesis-skills/synthesis-llm-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,685 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00061 $0.01685
Opus 5 $0.00030 $0.00843
Sonnet 5 $0.00012 $0.00337
Haiku 4.5 $0.00006 $0.00169

Measured 9d ago against content hash 7e9728512f8a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

synthesis-llm-setup 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 9d 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/synthesis-llm-setup/SKILL.md · 211 lines

How it starts

The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LLM Setup

Configure Claude Projects, ChatGPT GPTs, Gemini Gems, and other LLM platforms using compiled AI Knowledge content from the ragbot system.

Configuration

These values are user-specific. Update them for your environment.

Setting Value Description
ai_knowledge_repo ai-knowledge-{name}/ Your ai-knowledge repository root
compiled_instructions_path compiled/{project}/instructions/ Path to LLM-specific compiled instructions
knowledge_file all-knowledge.md Concatenated knowledge file (auto-generated by CI/CD)
source_dir source/ Directory to edit directly (knowledge concatenation is automatic)

Architecture overview

The AI Knowledge system produces platform-specific content for each LLM's project/custom instruction system.

Operation Where When
Knowledge concatenation (all-knowledge.md) CI/CD (GitHub Actions) Every push to source/
Instruction compilation Local (ragbot compile) When instructions change (rare)
RAG indexing Local (ragbot index) When content changes and RAG is needed

Output structure

ai-knowledge-{name}/
├── compiled/
│   └── {project}/
│       └── instructions/         # LLM-specific custom instructions
│           ├── claude.md
│           ├── chatgpt.md
│           └── gemini.md
└── all-knowledge.md              # Concatenated knowledge (auto-generated by CI/CD)

Key principle: Edit source/ files directly. Knowledge concatenation is automatic.

Knowledge delivery strategy:

  • Claude: GitHub sync the repo (Claude reads all-knowledge.md directly)
  • ChatGPT: Upload all-knowledge.md
  • Gemini: Upload all-knowledge.md (works within the 10-file Gem limit)

Claude Projects setup

Custom instructions

  1. Create a new Claude Project (or open an existing one).
  2. Go to Project Knowledge, then Custom Instructions.
  3. Copy content from compiled/{project}/instructions/claude.md.
  4. Paste into the custom instructions field.

Read the full file on GitHub · 211 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. 9d ago First seen · 211 lines · 61 tokens per session scan A 7e9728512f8a

Subscribe to this mod's changes

synthesis-llm-setup is a skill published in the GitHub repository synthesisengineering/synthesis-skills (18 stars, last pushed 2d ago), licensed Apache-2.0. It adds 61 tokens to every session and 1,685 once invoked, about $0.0003 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 2026-08-30.

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