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A SKILL.md-based Agent Skills / Claude Code plugin that automates your project's documentation lifecycle — ADR automation, changelog automation, release notes, devlogs, and a project index — as six focused skills.

chronicle turns the documentation chores you keep forgetting — writing ADRs, updating the changelog, cutting releases, keeping a devlog, maintaining a project index and CLAUDE.md — into one-line workflows. Every workflow adapts to your project layout via a small optional config (with sensible auto-detection), and the deterministic parts run as zero-dependency Node scripts so they're fast and consistent.

Good projects rot at the edges: decisions get made but never written down, the changelog drifts from reality, releases ship with hand-typed notes, and the CLAUDE.md that agents rely on goes stale. These chores are individually trivial and collectively never done. chronicle makes each one a single command — and because the heavy lifting runs in deterministic scripts (not the model), the output is consistent every time and costs almost no tokens.

The six skills aren't isolated tools — they're stages of one loop. A decision becomes a changelog entry, which becomes release notes, which you record in a devlog, all surfaced through a single index, while CLAUDE.md keeps your agents oriented.

flowchart LR
    A["🧭 Decide<br/><b>adr</b>"] --> B["📝 Record change<br/><b>changelog</b>"]
    B --> C["🚀 Ship<br/><b>release</b>"]
    C --> D["📓 Log the session<br/><b>devlog</b>"]
    A -.-> E["🗂️ Navigate<br/><b>index</b>"]
    B -.-> E
    C -.-> E
    D -.-> E
    E --> F["🤖 Keep agents oriented<br/><b>claude-md</b>"]
    F -.->|next iteration| A

    classDef stage fill:#f3e8ff,stroke:#7c3aed,color:#1a1a1a;
    classDef hub fill:#e0f2fe,stroke:#0369a1,color:#1a1a1a;
    class A,B,C,D,F stage;
    class E hub;

/plugin marketplace add sp-daewoon/chronicle
/plugin install chronicle@chronicle

Requires Node.js 18+ on your PATH. That's the only dependency.

Record a decision:

/chronicle:adr Use PostgreSQL for the primary datastore

Log a change:

/chronicle:changelog Added dark mode toggle

Cut a release:

/chronicle:release 1.2.0

Each skill also works conversationally — just describe what you want ("write up today's devlog", "regenerate the project index").

Each skill is a thin set of instructions for Claude. When deterministic work is needed — parsing a changelog, numbering an ADR, rendering an index — the skill calls a small Node helper via ${CLAUDE_PLUGIN_ROOT}. The helpers read your config (or auto-detect it), operate on your project files, and write the result back. The model decides what to do; the scripts handle how, identically every time.

flowchart TD
    U([You]) -->|"/chronicle:<skill>"| S

    subgraph PLUGIN["chronicle plugin"]
        S["skills/*/SKILL.md<br/><i>(instructions for Claude)</i>"]
        S -->|"node CLAUDE_PLUGIN_ROOT/scripts"| H

        subgraph HELPERS["scripts/ · zero-dependency Node"]
            H["adr-index · changelog-parse<br/>release-notes · devlog-render<br/>index-render"]
            H --> L["lib/ · config · md · fsutil"]
        end
    end

    CFG[("chronicle.config.json<br/><i>or auto-detect</i>")] -.->|"paths & formats"| H
    H -->|"read / write"| OUT[["📁 docs/adr · CHANGELOG.md<br/>docs/devlog · docs/INDEX.html"]]

    classDef box fill:#faf5ff,stroke:#7c3aed,color:#1a1a1a;
    classDef out fill:#ecfdf5,stroke:#059669,color:#1a1a1a;
    class S,H,L box;
    class OUT,CFG out;

claude-md is the one skill with no helper — keeping CLAUDE.md lean is a judgment task, so it's fully model-driven.

chronicle works with zero configuration — it auto-detects common locations (docs/adr, CHANGELOG.md, docs/devlog). To customize, drop a chronicle.config.json in your project root:

{
  "adr":       { "dir": "docs/adr", "numberWidth": 4, "indexFile": "docs/adr/README.md" },
  "changelog": { "path": "CHANGELOG.md", "format": "keepachangelog" },
  "devlog":    { "dir": "docs/devlog", "sections": ["Summary", "Changes", "Decisions", "Next"] },
  "index":     { "output": "docs/INDEX.html", "sources": ["adr", "changelog", "releases"] },
  "release":   { "provider": "github", "tagPrefix": "v", "readmeTable": true }
}

A starter template lives at templates/chronicle.config.json.

• Skills (skills/*/SKILL.md) are LLM instructions; deterministic work is delegated to Node helpers (scripts/*.mjs) called via ${CLAUDE_PLUGIN_ROOT}.
• Helpers use only Node 18+ built-ins — no npm dependencies. The source comments are written in Korean for the maintainer; the code and all output are language-neutral.
• The repo is also its own marketplace (.claude-plugin/marketplace.json).

Run the helper tests:

npm test

chronicle is open source and built to get better with the community. Fork it, use it on your own projects, and if something's missing, rough, or broken, please open an issue or send a pull request — I genuinely hope this grows into something more useful through your contributions.

It's easy to hack on: each skill is independent, and the helpers are pure, unit-tested Node modules with zero dependencies, so changes are easy to reason about and review. Before opening a PR, please run:

npm test
claude plugin validate .

Ideas, bug reports, new workflows, better wording — all welcome.

MIT © sp-daewoon