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.
npx skills add JustineDevs/premortem --skill arize-promptsgit clone --depth 1 https://github.com/JustineDevs/premortemWrote 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.
[](https://agentmods.dev/skills/justinedevs/premortem/arize-prompts)<a href="https://agentmods.dev/skills/justinedevs/premortem/arize-prompts"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/arize-prompts/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/justinedevs/premortem/arize-prompts"><img src="https://agentmods.dev/badge/skills/justinedevs/premortem/arize-prompts.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00110 | $0.04974 |
| Opus 5.5 | $0.00044 | $0.01990 |
| Sonnet 5.5 | $0.00022 | $0.00995 |
| Haiku 4.5 | $0.00011 | $0.00497 |
Grade A, and why
arize-prompts 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 2mo 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.
This is a copy
91% identical to arize-prompts — 86 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.
How it starts
The opening of the file, as written. The whole thing — 404 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Arize Prompts Skill
SPACE— All--spaceflags and theARIZE_SPACEenv var accept a space name (e.g.,my-workspace) or a base64 space ID (e.g.,U3BhY2U6...). Find yours withax spaces list.
Official references (read the skill body first; open docs only if the user needs UI walkthroughs):
- CLI: https://arize.com/docs/api-clients/cli/prompts
- Creating prompts in the product (Prompt Playground, variables, params): https://arize.com/docs/ax/prompts/tutorial/create-a-prompt
See references/cli-prompts.md for full flag tables.
How this skill fits into the prompt workflow
| Skill | Use it for |
|---|---|
This skill (arize-prompts) |
Workflows A–B: build or import templates and save · C: labels / promote · D: list, get, edit description, new version for message changes, delete, duplicate |
| arize-prompt-optimization | Improving prompt text using traces, datasets, experiments, and the optimization meta-prompt — often after you know what to change |
| arize-experiment | Running dataset experiments that consume Hub prompts or column-mapped inputs |
| arize-evaluator | Scoring prompt outputs with LLM-as-judge |
Typical loop: Author or elicit the prompt (Playground or chat) → save to Hub → run experiments (arize-experiment) → evaluate outputs (arize-evaluator) → optimize (arize-prompt-optimization) → save new version → promote with labels.
Concepts: what is a prompt in Arize?
A prompt in Prompt Hub is a named, versioned template stored in a space — not a one-off string in code. It is an artifact you can open in the Playground, diff across versions, and wire to experiments or production workflows.
Each prompt includes:
- Messages — an ordered chat transcript (system, user, assistant, tool roles) as stored JSON. Typically a system message for behavior and a user message as the template that receives dataset or runtime variables.
- Template variables — must be written with single curly braces around each name:
{+ identifier +}(same shape as{}with the variable name inside), e.g.{question},{context}. Filled at runtime by experiments or your app. Always use--input-variable-format f_stringfor this style. Do not ask the user which variable format to use — default tof_stringunless the template clearly uses Mustache{{...}}or you neednonefor literal braces with no substitution. - Provider and model — the vendor and model this version targets.
--provideris required by the CLI on everycreateandcreate-version.--modelmust always appear in commands this skill proposes — pick an explicit model string, propose a sensible default if unknown, and confirm before running. - Invocation parameters — optional model settings like temperature and max tokens, configured under Params in the UI. CLI flows still require provider and explicit model alongside messages and format.
- Version history — every material change creates a new immutable version. Labels like
productionandstagingare mutable pointers to specific versions so your app code never needs to change when you promote a new version. - Version description — the optional text on Save New Version in the Hub UI is the same concept as
--commit-messagein the CLI.
What ships with it
3 files 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.
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.
- 2mo ago First seen · 404 lines · 110 tokens per session scan A 28bb834b54ad
arize-prompts is a skill published in the GitHub repository JustineDevs/premortem (2 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 110 tokens to every session and 4,974 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 91% identical to arize-prompts, differing in 86 lines, and is treated as a copy.
arize-prompts compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| arize-promptsJustineDevs/premortem | Skill | 2 | 3mo ago | Apache-2.0 | A | 110 | Claude Code, Codex |
| v4-best-practicesHmbown/CodeWhale | Skill | 41k | 5d ago | MIT | A | 51 | Claude Code, Codex |
| prompt-engineeringericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 83 | Claude Code, Codex |
| refineautomagik-dev/genie | Skill | 351 | yesterday | MIT | A | 37 | Codex |
| best-practicesMoizIbnYousaf/Ai-Agent-Skills | Skill | 1.2k | 1mo ago | MIT | A | 35 | Claude Code, Codex |
| cx-ai-centercoralogix/cx-cli | Skill | 241 | yesterday | Apache-2.0 | A | 89 | Claude Code, Codex |
| llm-application-devMoizIbnYousaf/Ai-Agent-Skills | Skill | 1.2k | 1mo ago | MIT | A | 40 | Claude Code, Codex |