changesets

changesets is a skill for Claude Code, Codex from ScriptedAlchemy/agent-bundle. It costs 44 tokens per session (544 once invoked), scanned A, a copy of changesets, Apache-2.0.

A checklist for deciding whether a code change needs a changeset—a small release note that tells package users what changed and what version update is required.

In plain words
What is it for?
Use it after runtime, public API, entrypoint, lifecycle, data-format, or required-service changes to classify their impact and write the appropriate release note.
Why use it?
It prevents consumer-visible changes from being released without explanation, while avoiding unnecessary notes for internal or documentation-only work.

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 after runtime, public API, entrypoint, lifecycle, data-format, or required-service changes to classify their impact and write the appropriate release note.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/scriptedalchemy/agent-bundle/changesets
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 ScriptedAlchemy/agent-bundle --skill changesets
Clone the repo
git clone --depth 1 https://github.com/ScriptedAlchemy/agent-bundle

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 changesets

README.md
[![agentmods](https://agentmods.dev/badge/skills/scriptedalchemy/agent-bundle/changesets.svg)](https://agentmods.dev/skills/scriptedalchemy/agent-bundle/changesets)
Your own site
<a href="https://agentmods.dev/skills/scriptedalchemy/agent-bundle/changesets"><img src="https://agentmods.dev/badge/skills/scriptedalchemy/agent-bundle/changesets.svg" alt="Measured on agentmods" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 544 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 100% copy Near-identical to another mod 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 $0.00044 $0.00544
Opus 5 $0.00022 $0.00272
Sonnet 5 $0.00009 $0.00109
Haiku 4.5 $0.00004 $0.00054

Measured 3d ago against content hash 285aa88c9322, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

changesets 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.

Origin

This is a copy

100% identical to changesets — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

repos/effect/.agents/skills/changesets/SKILL.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Record what consumers need to know after implementation and focused validation.

Workflow

  1. Inspect the complete diff and identify directly affected published packages.
  2. Classify impact across source types, runtime behavior, entrypoints, required services, lifecycle, and persisted or wire data.
  3. Perform the breaking audit below.
  4. Record either a reason no changeset is required or one coherent changeset. When required, read authoring.md.
  5. Validate package names, frontmatter, bump policy, and consumer-facing text.

Do not include unrelated worktree changes.

Requirement

Create a changeset for observable runtime behavior changes, including bug fixes; exported value or public type changes; entrypoint or export-map changes; changes to required services, errors, ownership, defaults, or lifecycle; and persisted, serialization, protocol, or wire-format changes.

Tests-only changes, behavior-preserving internal refactors, documentation or JSDoc maintenance, and unpublished tooling normally do not need one. When unclear, inspect exports and consumer-visible declarations rather than inferring from source location.

Breaking Audit

A change is breaking when valid existing consumer code, configuration, or data must change to keep compiling or behaving according to the previous contract. Audit every surface:

  • Names and locations: exports, entrypoints, compatibility exports, and module paths.
  • Call compatibility: parameters, accepted inputs, overload resolution, generic parameters, and defaults.
  • Result compatibility: return and error types, output narrowing, members, inference, and required services.
  • Runtime contracts: defaults, failures, interruption, concurrency, ordering, resource lifetime, acquisition, cleanup, and mutation.
  • Data compatibility: persisted schemas, encodings, database layouts, protocols, and wire formats.

Additive exports, optional parameters, and behavior-preserving implementations are normally non-breaking. A fix restoring the documented contract is normally non-breaking but still needs a changeset when its operational impact is consumer-visible. Verify representative existing calls when overload ordering, structural assignability, or inference makes compatibility uncertain. API diff output is mechanical evidence, not a semantic-version decision.

Read the full file on GitHub · 59 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 59 lines · 44 tokens per session scan A 285aa88c9322

Subscribe to this mod's changes

changesets is a skill published in the GitHub repository ScriptedAlchemy/agent-bundle (9 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 544 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to changesets, differing in 0 lines, and is treated as a copy.