wiki-synthesize

wiki-synthesize is a skill for Claude Code, Codex from saski/arnesto. It costs 90 tokens per session (1,667 once invoked), scanned A, original, Unlicense.

A method for finding concepts that often appear together across an Obsidian wiki but lack a page explaining their connection.

In plain words
What is it for?
Use it to scan wiki links and tags, rank promising concept pairs, and create synthesis pages.
Why use it?
It helps reveal missing cross-topic explanations instead of leaving related knowledge scattered across separate pages.

Skill for Claude CodeCodex

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

Good fit Use it to scan wiki links and tags, rank promising concept pairs, and create synthesis pages.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/saski/arnesto/wiki-synthesize
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 saski/arnesto --skill wiki-synthesize
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-synthesize

README.md
[![agentmods](https://agentmods.dev/badge/skills/saski/arnesto/wiki-synthesize/github.svg)](https://agentmods.dev/skills/saski/arnesto/wiki-synthesize)
Your own site
<a href="https://agentmods.dev/skills/saski/arnesto/wiki-synthesize"><img src="https://agentmods.dev/badge/skills/saski/arnesto/wiki-synthesize/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.

agentmods 80×15 button for wiki-synthesize

Your own site · 80×15
<a href="https://agentmods.dev/skills/saski/arnesto/wiki-synthesize"><img src="https://agentmods.dev/badge/skills/saski/arnesto/wiki-synthesize.svg" alt="Reviewed on agentmods" width="80" 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 1,667 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 $0.01667
Opus 5 $0.00045 $0.00834
Sonnet 5 $0.00018 $0.00333
Haiku 4.5 $0.00009 $0.00167

Measured 5d ago against content hash a2d8b07ca665, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

wiki-synthesize 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 5d 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-synthesize/SKILL.md · 165 lines

How it starts

The opening of the file, as written. The whole thing — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Wiki Synthesize — First-Class Synthesis Discovery

You are scanning the wiki for concepts that co-occur across many pages but have no dedicated synthesis page connecting them. Your job is to surface these gaps and fill the most valuable ones with cross-cutting synthesis pages.

Before You Start

  1. Read ~/.obsidian-wiki/config (preferred) or .env (fallback) to get OBSIDIAN_VAULT_PATH.
  2. Read index.md to get the full page inventory.
  3. Read hot.md if it exists — it surfaces recent activity and active threads that may already point to synthesis opportunities.
  4. Read _meta/taxonomy.md to understand the tag vocabulary.

Step 1: Build the Co-occurrence Map

Scan every non-special page in the vault (skip index.md, log.md, hot.md, _insights.md, _meta/*, _archives/*, _raw/*).

For each page, collect:

  • All [[wikilinks]] it contains (outgoing links)
  • Its tags frontmatter
  • Its category frontmatter

Build a co-occurrence matrix: for every pair of concept/entity pages (A, B), count how many other pages link to both A and B. This is their co-occurrence score.

You don't need to be exhaustive — aim for the top 20-30 pairs by co-occurrence score. Use Grep to find backlinks efficiently:

grep -rl "\[\[ConceptA\]\]" "$OBSIDIAN_VAULT_PATH" --include="*.md"

Run this for your top candidate concepts and intersect the result sets.

Step 2: Filter Out Already-Synthesized Pairs

Check the synthesis/ directory for existing pages. For each existing synthesis page:

  • Read its sources frontmatter or its body for [[wikilinks]]
  • Mark those concept pairs as already covered

Remove covered pairs from your candidate list.

Step 3: Score and Rank Candidates

For each remaining candidate pair (or cluster of 3+), assign a synthesis value score:

Signal Points
Co-occurrence count ≥ 5 +3
Co-occurrence count 3-4 +2
Co-occurrence count 1-2 +1
Concepts are in different categories (cross-domain) +2
Concepts share tags but live in different folders +1
One or both concepts are tagged as hubs in _insights.md +1
A synthesis would resolve a flagged contradiction +2

Read the full file on GitHub · 165 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. 5d ago First seen · 165 lines · 90 tokens per session scan A a2d8b07ca665

Subscribe to this mod's changes

wiki-synthesize is a skill published in the GitHub repository saski/arnesto (5 stars, last pushed 2d ago), licensed Unlicense. It adds 90 tokens to every session and 1,667 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.