chronik

chronik is a skill for Claude Code, Codex from mm-weber/loremaester. It costs 85 tokens per session (1,280 once invoked), scanned A, original, MIT.

A skill for updating a campaign record from player notes in a tabletop role-playing game. It focuses on recording what happened and exactly what each character or non-player character learned.

In plain words
What is it for?
Use it to add or correct session entries in CampaignChronicle.md using PlayerNotes, dates, and related session-preparation files.
Why use it?
It prevents important facts from being lost or confused with planned events. It also keeps the campaign record grounded in the players' actions.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/mm-weber/loremaester/chronik
Any agent
npx skills add mm-weber/loremaester --skill chronik
Clone the repo
git clone --depth 1 https://github.com/mm-weber/loremaester

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 chronik

README.md
[![agentmods](https://agentmods.dev/badge/skills/mm-weber/loremaester/chronik.svg)](https://agentmods.dev/skills/mm-weber/loremaester/chronik)
Your own site
<a href="https://agentmods.dev/skills/mm-weber/loremaester/chronik"><img src="https://agentmods.dev/badge/skills/mm-weber/loremaester/chronik.svg" alt="Measured on agentmods" height="20"></a>
Per session 85 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,280 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00085 $0.01280
Opus 5 $0.00043 $0.00640
Sonnet 5 $0.00017 $0.00256
Haiku 4.5 $0.00009 $0.00128

Measured 4d ago against content hash 8292e8e5c826, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

chronik 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 4d 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.

examples/ttrpg/skills/chronik/SKILL.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Campaign Chronicle Update Assistant

Update the Campaign Chronicle from PlayerNotes with strict information-exchange precision. The Chronicle is the campaign's canonical record of what happened — if information gets lost in summarization, it's lost forever.

The Cardinal Rule

For every NPC interaction in the Chronicle, a reader must be able to answer: "What exactly does each party know after this conversation that they didn't know before?"

If the Chronicle entry doesn't answer that question, it's incomplete.

Source of Truth Hierarchy

Per the vault's CLAUDE.md:

  1. PlayerNotes = what HAPPENED (player actions, canon)
  2. In-game calendar / dates = when events occurred (canon)
  3. Session prep files = what was PLANNED (context, may or may not be canon depending on player actions)

The Chronicle synthesizes all three, but PlayerNotes always win on what occurred.

Workflow

Phase 1: Read and Identify

  1. Read the PlayerNotes for the target session(s)
  2. Read all linked Session prep files — find the session folder under Sessions/Session N/ and read every sub-file. These contain GM context about NPC motivations, hidden agendas, and what information NPCs were trying to extract.
  3. Read referenced NPC files — for every NPC mentioned in the player notes, read their note in NPC/. Pay attention to faction, relationships, and any campaign-connection sections.
  4. Check in-game dates — if the vault tracks dates (e.g. via a calendar plugin or in-frontmatter game_date:), anchor each event chronologically.

Phase 2: Extract Information Exchange Events

For EVERY scene where a PC talks to an NPC, build this matrix:

Scene: [PC] meets [NPC] at [Location]
├── What PC SHARED (explicitly stated in PlayerNotes)
│   └── List each piece of information with the exact phrasing from the notes
├── What PC WITHHELD or REFUSED to share
│   └── Note what was asked for and refused, with the reason if given
├── What NPC GAINED (cross-ref with Session prep — did the NPC learn something they were specifically after?)
│   └── Connect shared info to NPC's hidden goals from prep files
├── What PC LEARNED (new facts, NPC backstory, world info)
│   └── Include NPC revelations, offers, philosophy shared
└── What was OFFERED but not yet resolved
    └── Deals, trades, future commitments

Read the full file on GitHub · 97 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. 4d ago First seen · 97 lines · 85 tokens per session scan A 8292e8e5c826

Subscribe to this mod's changes

chronik is a skill published in the GitHub repository mm-weber/loremaester (19 stars, last pushed 1mo ago), licensed MIT. It adds 85 tokens to every session and 1,280 once invoked, about $0.0004 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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