package-release-engineering

A release checklist and process for publishing TypeScript libraries to npm, the package registry commonly used by JavaScript projects.

In plain words
What is it for?
Use it to choose patch, minor, or major version changes; check package contents; update release notes; validate builds and tests; and prepare a safe npm release.
Why use it?
It reduces accidental breaking releases and helps ensure that the published package, version number, documentation, and compatibility details are correct.

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/samplexbro/agentsmesh/package-release-engineering
Any agent
npx skills add sampleXbro/agentsmesh --skill package-release-engineering
Clone the repo
git clone --depth 1 https://github.com/sampleXbro/agentsmesh

Made for: Claude Code, Codex.

Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 556 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 $0.00038 $0.00556
Opus 5 $0.00019 $0.00278
Sonnet 5 $0.00008 $0.00111
Haiku 4.5 $0.00004 $0.00056

Measured 2d ago against content hash e2f26fc8d2ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

package-release-engineering 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 2d 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/package-release-engineering/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

Package Release Engineering

You are a release engineer for a public TypeScript package.

Goals

  • Ship correct artifacts.
  • Prevent accidental breaking releases.
  • Keep semver honest.
  • Make releases reproducible and auditable.

Release principles

  1. Semver must reflect real impact.

    • Patch: bug fixes, internal changes with no consumer-facing break
    • Minor: backward-compatible features
    • Major: any breaking API, behavior, type, import-path, runtime, or support-policy change
  2. The published artifact is the product.

    • Validate npm pack contents before publishing.
    • Never assume local source layout equals published behavior.
  3. Changelog entries should be consumer-oriented.

    • Explain what changed and why it matters.
    • Call out migration steps for breaking changes.

Pre-release checklist

Before publishing, verify:

  • working tree is clean
  • version is correct
  • changelog is updated
  • tests pass
  • build passes
  • package contents are correct
  • README examples still work
  • Node/runtime compatibility is still accurate
  • peer dependency ranges are still valid

Semver risk checklist

Treat these as potentially breaking unless proven otherwise:

  • removing or renaming exports
  • changing thrown error classes/shapes in relied-on paths
  • changing default values with observable behavior impact
  • changing async/sync behavior
  • changing type constraints that reject previously valid code
  • narrowing accepted input values
  • changing import paths or exports map
  • dropping Node version support

Publish safety checks

Recommend commands and validation such as:

  • npm version <patch|minor|major> or equivalent release tooling
  • npm pack --dry-run
  • install tarball into a temporary test project
  • smoke-test runtime and types from the packed artifact
  • publish with provenance or org-required settings when applicable

Changelog rules

Good changelog entries are:

  • grouped by Added / Changed / Fixed / Deprecated / Removed if helpful
  • written for users, not for commit archaeology
  • explicit about breaks and migrations

Read the full file on GitHub · 89 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. 2d ago First seen · 89 lines · 38 tokens per session scan A e2f26fc8d2ab

Subscribe to this mod's changes

package-release-engineering is a skill published in the GitHub repository sampleXbro/agentsmesh (24 stars, last pushed 2d ago), licensed MIT. It adds 38 tokens to every session and 556 once invoked, about $0.0002 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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