Review Agent Skill

Review before merge. Stage-1 spec-compliance gate, then risk-selected Stage-2 review axes from the canonical set. analyst always runs…

Context cost
46.6k tokensestimated from the bundle, loaded when it triggers
Bundle
19 files · 256.9 kB3 scripts among them — read before you run
Licence
MITthe author’s own terms
Last change
—v1.0.0
Servers it uses
Noneruns standalone

What it does

Review before merge. Stage-1 spec-compliance gate, then risk-selected Stage-2 review axes from the canonical set. analyst always runs, callers can pin extra always-on axes, and explicit deep review runs the full 16-axis set. Run after /test. Do NOT invoke code-qualities-assessment, doc-accuracy, golden-principles, or taste-lints directly for a full review; review can select them when requested or when deep review is explicit.

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.

collaboration

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.md24.6 kB · preview
--- name: review version: 1.0.0 argument-hint: branch-or-pr-number allowed-tools: Task, Skill, Read, Glob, Grep, Bash(*) user-invocable: true license: MIT metadata: capability: kind: orchestrator owns: [technical-review] depends-on: [code-archaeology, untrusted-content-handling] status: active routing: role: front-door invoker: autoplan trigger: lifecycle review request user-facing: true ---
22# Review
23
24Review: the problem statement from the conversation (under Copilot CLI the skill tool takes no argument vector, so state it in your message)
25
26If no argument, review the current branch diff against the base branch. Detect the base branch from gh pr view --json baseRefName or fall back to main.
27
28## Triggers
29
30| Trigger Phrase | Operation |
31|----------------|-----------|
32| /review | Run the Stage-1 spec-compliance gate, then the Stage-2 review against the current branch diff |
33| /review BRANCH_OR_PR | Run the Stage-1 gate, then the Stage-2 review against the named branch or PR |
34| review before merge | Same as /review |
35
36## Convergence contract (REQ-008-04)
37
38/review evaluates the canonical review axes by change risk, not by blind fan-out. The canonical axis prompts are authored at references/{role}.md co-located with this skill, with the canonical path expressed as .claude/skills/review/references/{role}.md in the source repo (the single source of truth). /review auto-discovers the axis set from references/*.md at runtime for --deep review; risk mode needs a table entry, or the axis is skipped (axis-selection.md). Enrollment is not edit-free: the axis names and counts in this body document that directory rather than drive it, and a contract test reds on drift. When CI exists in a project, the project syncs the canonical axes into its own CI prompts via the project's generator and drift checks. The build pipeline copies the whole skill directory into vendored plugin installs (see "Vendored install"), so the command runs with no CI dependency.
39
40The canonical set is spec-compliance as the Stage-1 gate plus 11 Stage-2 canonical axes (analyst, architect, qa, security, devops, roadmap, reliability, observability, agent-safety, decision-rigor, code-quality). spec-compliance and analyst always run. Callers can pin additional always-on axes, and the remaining axes are selected from verified changed paths and diff effects by select_axes.py (Process step 4), never by prompt prose. spec-compliance runs first and gates Stage 2: only a CRITICAL_FAIL short-circuits the review (see Process step 2). A Stage-1 UNKNOWN (INCONCLUSIVE) does NOT short-circuit; Stage 2 still runs and the UNKNOWN is preserved as an UNKNOWN in the merge, because no spec or acceptance criteria could be located and that absence must never suppress a real Stage-2 finding. The caller decides how the merged verdict gates its workflow.
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md3,458 words
Files19
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.

≈220
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
46,355
on trigger
The instruction body and 18 supporting files, read only when the skill fires.
23.3%
of a 200k window
Ten skills this size would not fit in the window together.
050k100k150k200k context window

46.6k 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.

Its SKILL.md asks for Bash, which can write files and reach the network alike, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

The allowed-tools line of this skill’s own SKILL.md asks for Bash, which could do either, so neither is 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

19 files, 256.9 kB on disk. Mostly text — the instructions the model reads — with 3 scripts in it that your client would run only if the instructions tell it to.

  • SKILL.md24.6 kB
  • references/agent-safety.md10.1 kB
  • references/analyst.md9.2 kB
  • references/architect.md11.0 kB
  • references/code-quality.md10.7 kB
  • references/decision-rigor.md10.8 kB
  • references/devops.md15.5 kB
  • references/observability.md9.4 kB
  • references/qa.md14.0 kB
  • references/reliability.md10.1 kB
  • references/roadmap.md9.6 kB
  • references/security.md11.2 kB
  • references/spec-compliance.md12.3 kB
  • resources/axis-selection.md13.2 kB
  • resources/technical-review.md10.7 kB
  • resources/writing-style.md3.9 kB
  • scripts/select_axes.py35.8 kB
  • scripts/validate_findings_scope.py12.0 kB
  • scripts/validate_review_marker.py22.8 kB
What is not in it

A skill installs nothing and depends on nothing: it is a folder your client reads. This one carries 3 scripts beside the text, so the bundle is 19 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.

# Review · 46.6k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/rjmurillo-review/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/review" ] && { [ ! -e .claude/skills/review ] || { mv .claude/skills/review "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/review" .claude/skills/ && echo "Installed .claude/skills/review"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add rjmurillo/review

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/review/ 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/rjmurillo-review/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/review" ] && { [ ! -e ~/.claude/skills/review ] || { mv ~/.claude/skills/review "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/review" ~/.claude/skills/ && echo "Installed ~/.claude/skills/review" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/review/ 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.

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
Version1.0.0
Publishedno release date on file
PriceFree
Referencerjmurillo/review

Versions

v1.0.0 is what is on the shelf; no release here carries a date. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

v1.0.0
  • No earlier releases have been published to the marketplace.
Pinning

The install command always fetches the release that is current the day you run it — v1.0.0 today — and cannot ask for an earlier one. The copy on your disk does not change until you run it again.

Reviews

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