arnesto: Skill for Claude Code

.agents/skills/wiki-capture/SKILL.md

wiki-capture is a skill for Claude Code, Codex from saski/arnesto. It costs 90 tokens per session (1,519 once invoked), scanned A, original, Unlicense.

A conversation-saving tool that turns the useful knowledge from the current chat into a structured note in an Obsidian wiki. The wiki is a personal knowledge base made from linked notes.

In plain words
What is it for?
Use it to save a discussion, decision, technical finding, or other durable insight as a wiki page.
Why use it?
It preserves decisions, findings, and explanations that would otherwise remain only in the conversation and become hard to find later.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is saski/arnesto's own configuration. It tells Claude Code and Codex how to work on arnesto itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything arnesto configures →

Reuse

Borrowing it

Nothing to install: this file belongs to saski/arnesto. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/saski/arnesto/main/.agents/skills/wiki-capture/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/saski/arnesto

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 wiki-capture

README.md
[![agentmods](https://agentmods.dev/badge/skills/saski/arnesto/wiki-capture.svg)](https://agentmods.dev/skills/saski/arnesto/wiki-capture)
Your own site
<a href="https://agentmods.dev/skills/saski/arnesto/wiki-capture"><img src="https://agentmods.dev/badge/skills/saski/arnesto/wiki-capture.svg" alt="Measured on agentmods" height="20"></a>
Per session 90 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,519 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00090 $0.01519
Opus 5 $0.00045 $0.00759
Sonnet 5 $0.00018 $0.00304
Haiku 4.5 $0.00009 $0.00152

Measured 3d ago against content hash 39b7a8db54a2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

wiki-capture 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.

.agents/skills/wiki-capture/SKILL.md · 210 lines

How it starts

The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Wiki Capture — Conversation to Wiki Note

You are preserving knowledge from the current conversation as a permanent wiki note. The goal is to extract the substance — the knowledge itself — not a summary of what was said.

Before You Start

  1. Read ~/.obsidian-wiki/config (preferred) or .env (fallback) to get OBSIDIAN_VAULT_PATH
  2. Read $OBSIDIAN_VAULT_PATH/index.md to understand existing wiki content (avoid duplicates)
  3. Read $OBSIDIAN_VAULT_PATH/hot.md if it exists — it gives context on recent activity

Step 1: Identify What's Worth Preserving

Scan the conversation. Ask: what knowledge emerged here that would be valuable in 3 months with no memory of this chat?

Worth preserving:

  • Decisions made and why they were made
  • Analysis, frameworks, mental models developed
  • Technical findings, patterns, or procedures
  • Synthesized understanding of a topic
  • Clear explanations of a concept that took effort to arrive at
  • Key facts from an external source discussed in the conversation

Skip:

  • Logistics, scheduling, pleasantries
  • Exploratory back-and-forth where no conclusion was reached
  • Content that's already in the wiki

If nothing material emerged, tell the user and stop.

Step 2: Classify the Content Type

Assign one of five types — this determines the target folder and tone:

Type Description Target folder
synthesis Multi-step analysis or an answer to a specific question that required reasoning synthesis/
concept A definition, framework, or mental model (what a thing is) concepts/
source Summary of an external document, article, or resource discussed references/
decision A strategic, architectural, or design choice and its rationale synthesis/
session A complete discussion summary when the conversation spans multiple topics journal/

If the content clearly belongs to a specific project (detected from context or user mention), place it under projects/<project-name>/<category>/ instead.

Read the full file on GitHub · 210 lines

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 · 210 lines · 90 tokens per session scan A 39b7a8db54a2

Subscribe to this mod's changes

wiki-capture is a skill published in the GitHub repository saski/arnesto (5 stars, last pushed today), licensed Unlicense. It adds 90 tokens to every session and 1,519 once invoked, about $0.0005 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 2026-09-03.

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