Workflow·Cloud & DevOps

Harness Release Manager Agent Skill

Automates the entire software release lifecycle including SemVer versioning, CHANGELOG generation, GitHub Releases, and cross-platform…

Context cost
12.8k tokensestimated from the bundle, loaded when it triggers
Bundle
7 files · 51.3 kBtext throughout, nothing executable
Licence
MITthe author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Generic release automation for projects using Keep a Changelog + GitHub. Single confirmation gate then end-to-end automation: bump detection, CHANGELOG promotion, PR/main merge, tag, GitHub Release. Trigger: release, version bump, publish. Do NOT load for: implementation, review, planning, setup.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

Workflow

Runs a procedure end to end.

changelogdevopsgithub
Filed under

Cloud & DevOps

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md25.7 kB · preview
--- name: harness-release description-en: "Generic release automation for projects using Keep a Changelog + GitHub. Single confirmation gate then end-to-end automation: bump detection, CHANGELOG promotion, PR/main merge, tag, GitHub Release. Trigger: release, version bump, publish. Do NOT load for: implementation, review, planning, setup." description-ja: "汎用リリース自動化スキル。Keep a Changelog と GitHub を使うあらゆるプロジェクトで動作。単一確認ゲートで bump 判定・CHANGELOG 昇格・PR/main 反映・タグ・GitHub Release まで全自動実行する。リリース、バージョンバンプ、タグ作成、公開で起動。実装・コードレビュー・プランニング・セットアップには使わない。" kind: workflow purpose: "Release projects through changelog, version, PR/main merge, tag, and GitHub Release gates" trigger: "release, version bump, publish" shape: workflow role: orchestrator pair: harness-review owner: harness-core since: "2026-05-05" allowed-tools: ["Read", "Write", "Edit", "Bash", "AskUserQuestion", "Skill"] argument-hint: "[patch|minor|major|--dry-run]" context: fork effort: high user-invocable: true ---
21# Harness Release (汎用)
22
23Keep a Changelog + GitHub を使う**あらゆるプロジェクト向け**の汎用リリース自動化スキル。
24
25**設計原則**: 単一確認ゲート。ユーザーは 1 回だけ全体計画を見て承認する。承認後はファイル書き換え → commit → branch push → PR 作成/更新 → default branch へ merge → default branch 上で tag → GitHub Release までを中断なく実行する。
26
27**Release complete の定義**: release は「tag と GitHub Release を作った」だけでは完了ではない。対象 work と release bump が default branch(通常 main)に merge 済みで、release tag が default branch 到達可能 commit を指し、GitHub Release がその tag を公開している状態を完了とする。
28
29## PR ready vs release ready
30
31Harness V2 では PR closeout と release closeout を混同しない。
32
33| Gate | 意味 | 必須条件 | 停止 lane |
34|------|------|----------|-----------|
35| **PR ready** | ブランチが review 可能で merge 判断できる | harness-review APPROVE、focused tests PASS、evidence pack 完備(accepted/rejected findings、tests、release-preflight warnings 処理、residual risk) | [lane:fast] / [lane:gate] はここで停止可 |
36| **release ready** | 公開配布 path が preflight を通過 | PR ready 条件 + version surface sync + tag + GitHub Release + CI/public artifact 検証 | [lane:release] のみ |
37
38- PR ready は harness-review APPROVE + evidence pack で判定する。harness-review から push / PR / merge はしない。
39- release ready は harness-release の Preflight / Post-Gate だけが判定する。version bump / tag / GitHub Release は release lane 専用。
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md2,111 words
Files7
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈320
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
12,505
on trigger
The instruction body and 6 supporting files, read only when the skill fires.
6.4%
of a 200k window
Ten skills this size would take about 64% of the window before you open a file.
050k100k150k200k context window

12.8k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

It asks the agent to write files, using whatever file access your client already has. Whether it reaches the network is not declared.

What it asks for
Writes filesyes
Network accessnot declared

Read from the allowed-tools line of this skill’s own SKILL.md. It also asks for Bash, which could do either, so what is not named there is not ruled out. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

7 files, 51.3 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md25.7 kB
  • references/bump-detection.md3.7 kB
  • references/github-release.md6.6 kB
  • references/post-gate-detail.md3.2 kB
  • references/release-notes.md2.2 kB
  • references/version-files.md3.9 kB
  • references/versioning.md6.0 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 7 files you can review in full before installing. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Harness Release Manager · 12.8k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/harness-release-manager/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/harness-release-manager" ] && { [ ! -e .claude/skills/harness-release-manager ] || { mv .claude/skills/harness-release-manager "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/harness-release-manager" .claude/skills/ && echo "Installed .claude/skills/harness-release-manager"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add chachamaru127/harness-release-manager

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/harness-release-manager/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/harness-release-manager/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/harness-release-manager" ] && { [ ! -e ~/.claude/skills/harness-release-manager ] || { mv ~/.claude/skills/harness-release-manager "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/harness-release-manager" ~/.claude/skills/ && echo "Installed ~/.claude/skills/harness-release-manager" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/harness-release-manager/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. It appears as harness-release in Gemini CLI, Codex, Copilot and Grok (its own name); Claude Code lists it by the folder name, harness-release-manager.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencechachamaru127/harness-release-manager

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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