install-jazz-github-action

A GitHub Actions setup that lets Jazz review pull requests and answer `/jazz` requests directly in GitHub.

In plain words
What is it for?
It helps configure automated PR reviews, on-demand PR assistance, workflow files, review agents, and the required model-provider secret.
Why use it?
It removes the need to start code reviews manually or move PR questions to another tool. Reviews and answers appear alongside the changed code.

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/lvndry/jazz/install-jazz-github-action
Any agent
npx skills add lvndry/jazz --skill install-jazz-github-action
Clone the repo
git clone --depth 1 https://github.com/lvndry/jazz

Made for: Claude Code, Codex.

Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,191 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 $0.00069 $0.03191
Opus 5 $0.00034 $0.01596
Sonnet 5 $0.00014 $0.00638
Haiku 4.5 $0.00007 $0.00319

Measured 3d ago against content hash 450b279bfda7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

install-jazz-github-action 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.

skills/install-jazz-github-action/SKILL.md · 238 lines

How it starts

The opening of the file, as written. The whole thing — 238 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Jazz GitHub Action

Turn Jazz into a GitHub Actions-powered PR reviewer and on-demand assistant. When someone opens a PR or comments /jazz, a Jazz agent reviews the diff and posts inline comments or answers questions.

Architecture

The setup uses five files in your repo plus one model-provider secret:

.github/
├── workflows/
│   └── jazz.yml              # Driver workflow (3 jobs: resolve, code-review, assistant)
└── jazz/
    ├── agents/
    │   ├── ci-reviewer.json   # Code review agent config
    │   └── pr-assistant.json  # PR assistant agent config
    └── workflows/
        ├── code-review/
        │   └── WORKFLOW.md    # Review instructions
        └── pr-assistant/
            └── WORKFLOW.md    # Assistant instructions

The release-notes agent + WORKFLOW.md in .github/jazz/ are not wired into jazz.yml; they are a manual utility and are intentionally absent from CI.

Required secret: a model-provider API key for the model chosen in step 1 (e.g. OPENAI_API_KEY if the user picked OpenAI). You must add it as a GitHub Actions secret — see step 5.

Workflow Jobs

The jazz.yml workflow has three jobs:

Job Trigger What it does
resolve Always runs first Extracts PR number, base SHA, head SHA, and user request from the triggering event
code-review PR opened/marked ready, /jazz-review comment, workflow_dispatch, or a push that changes jazz.yml itself Checks out code, runs Jazz review agent, parses output, posts inline comments
assistant /jazz <question> comment, bare /jazz, workflow_dispatch, or a push that changes jazz.yml itself Checks out code, runs Jazz assistant agent, posts answer as a PR comment

The assistant job needs: [resolve, code-review] so the two Jazz jobs don't burst the same provider account concurrently. A push to a branch with an open PR re-runs both jobs end-to-end to validate a change to jazz.yml itself.

Authorization

Read the full file on GitHub · 238 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. 3d ago First seen · 238 lines · 69 tokens per session scan A 450b279bfda7

Subscribe to this mod's changes

install-jazz-github-action is a skill published in the GitHub repository lvndry/jazz (50 stars, last pushed 3d ago), licensed MIT. It adds 69 tokens to every session and 3,191 once invoked, about $0.0003 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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