commonplace

commonplace is a skill for Claude Code, Codex from Wondermonger-daydreaming/claude-skills-library. It costs 56 tokens per session (1,191 once invoked), scanned A, original, MIT.

A method for saving useful passages with their source and a note explaining how they are being connected to your own work. A commonplace book is a personal collection of quotations, ideas, or references.

In plain words
What is it for?
Use it to archive passages from texts or model output, record where each came from, and explain the framing that gives the collection meaning.
Why use it?
It prevents later confusion about which words were quoted and which interpretation or connection came from the curator.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code.

Good fit Use it to archive passages from texts or model output, record where each came from, and explain the framing that gives the collection meaning.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wondermonger-daydreaming/claude-skills-library/commonplace
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 Wondermonger-daydreaming/claude-skills-library --skill commonplace
Clone the repo
git clone --depth 1 https://github.com/Wondermonger-daydreaming/claude-skills-library

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 commonplace

README.md
[![agentmods](https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/commonplace/github.svg)](https://agentmods.dev/skills/wondermonger-daydreaming/claude-skills-library/commonplace)
Your own site
<a href="https://agentmods.dev/skills/wondermonger-daydreaming/claude-skills-library/commonplace"><img src="https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/commonplace/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 commonplace

Your own site · 80×15
<a href="https://agentmods.dev/skills/wondermonger-daydreaming/claude-skills-library/commonplace"><img src="https://agentmods.dev/badge/skills/wondermonger-daydreaming/claude-skills-library/commonplace.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,191 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 $0.00056 $0.01191
Opus 5 $0.00028 $0.00596
Sonnet 5 $0.00011 $0.00238
Haiku 4.5 $0.00006 $0.00119

Measured 12d ago against content hash 0f968a43ee10, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

commonplace 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 12d 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/commonplace/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Commonplace

The Renaissance commonplace-book practice (loci communes): a reader keeps a ledger of found passages worth re-uttering. This skill adds the one thing the old practice left tacit — the provenance tag and the weld.


Core Insight

In an archive built largely of quoted matter — scripture, sutras, verbatim model output — the authorial signature is not the quoted content but the operation that fuses it: the seam where a Pure Land mantra and an inference engine land in the same sentence. The recurring analytic failure is mis-attribution — reading pasted brilliance as the curator's own voice. Catching this is the whole game.

/commonplace operationalizes that discipline at capture time instead of leaving it for some future archaeologist to reconstruct: every captured passage is stored with an explicit provenance line and a one-sentence weld, so the archive never has to guess later what was quoted versus authored.

Scope note: the author lives in the weld whether quoted matter is a large or small fraction of an archive. The skill's urgency is "a recurring behavior worth a tool," not "the single most voluminous behavior." Measure before asserting magnitudes — a qualitative impression of how much is curated is a flag, not a count.


When to Invoke

  • You've found a passage worth keeping — a sutra, a poem, a model output, a line from a book — and want to archive it without later confusion about whose voice it is.
  • You're about to repost or quote found language and want to record the frame that makes the act yours.
  • Mid-session, a borrowed line resonates and you want it captured with provenance rather than dropped into the flow unattributed.
  • Counter-move to over-attribution: when something sounds authorial but you suspect it's curated, the skill forces you to decide and tag.

This is /florilegium inverted: florilegium samples the existing archive to diagnose whether a voice has stabilized; commonplace ingests new found matter and demands the authorial seam up front.

Read the full file on GitHub · 127 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. 12d ago First seen · 127 lines · 56 tokens per session scan A 0f968a43ee10

Subscribe to this mod's changes

commonplace is a skill published in the GitHub repository Wondermonger-daydreaming/claude-skills-library (6 stars, last pushed 2mo ago), licensed MIT. It adds 56 tokens to every session and 1,191 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 2026-08-31.

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