Synapse: Skill for Claude Code

.agents/skills/expo-cicd-workflows/SKILL.md

expo-cicd-workflows is a skill for Claude Code from zai-org/Synapse. It costs 60 tokens per session (791 once invoked), scanned A, original, Apache-2.0.

A guide for writing EAS Workflows, YAML files that describe automated jobs for Expo projects. EAS is Expo’s service for building, testing, and delivering mobile apps.

In plain words
What is it for?
Use it to create or validate CI/CD pipelines for Expo and EAS, including automated builds and deployment workflows.
Why use it?
It uses the current workflow schema and documentation to check available jobs, settings, triggers, and runners. This reduces errors caused by outdated or incomplete workflow syntax.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: installed under .agents/ (shared by several agents).

This is zai-org/Synapse's own configuration. It tells Claude Code how to work on Synapse itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Synapse configures →

Reuse

Borrowing it

Nothing to install: this file belongs to zai-org/Synapse. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/zai-org/Synapse/main/.agents/skills/expo-cicd-workflows/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/zai-org/Synapse

Made for: Claude Code.

Wrote 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.

agentmods badge for expo-cicd-workflows

README.md
[![agentmods](https://agentmods.dev/badge/skills/zai-org/synapse/expo-cicd-workflows/github.svg)](https://agentmods.dev/skills/zai-org/synapse/expo-cicd-workflows)
Your own site
<a href="https://agentmods.dev/skills/zai-org/synapse/expo-cicd-workflows"><img src="https://agentmods.dev/badge/skills/zai-org/synapse/expo-cicd-workflows/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.

agentmods 80×15 button for expo-cicd-workflows

Your own site · 80×15
<a href="https://agentmods.dev/skills/zai-org/synapse/expo-cicd-workflows"><img src="https://agentmods.dev/badge/skills/zai-org/synapse/expo-cicd-workflows.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 791 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Data Exfiltration · line 22
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
How audits are shown
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 5.1 $0.00060 $0.00791
Opus 5.5 $0.00024 $0.00316
Sonnet 5.5 $0.00012 $0.00158
Haiku 4.5 $0.00006 $0.00079

Measured 1mo ago against content hash 484e1867238a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

expo-cicd-workflows 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 1mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/fetch.js, scripts/validate.js), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

Copies of this mod

6 near-identical copies found in the catalogue:

.agents/skills/expo-cicd-workflows/SKILL.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

EAS Workflows Skill

Help developers write and edit EAS CI/CD workflow YAML files.

Reference Documentation

Fetch these resources before generating or validating workflow files. Use the fetch script (implemented using Node.js) in this skill's scripts/ directory; it caches responses using ETags for efficiency:

# Fetch resources
node {baseDir}/scripts/fetch.js <url>
  1. JSON Schema — https://api.expo.dev/v2/workflows/schema

    • It is NECESSARY to fetch this schema
    • Source of truth for validation
    • All job types and their required/optional parameters
    • Trigger types and configurations
    • Runner types, VM images, and all enums
  2. Syntax Documentation — https://raw.githubusercontent.com/expo/expo/refs/heads/main/docs/pages/eas/workflows/syntax.mdx

    • Overview of workflow YAML syntax
    • Examples and English explanations
    • Expression syntax and contexts
  3. Pre-packaged Jobs — https://raw.githubusercontent.com/expo/expo/refs/heads/main/docs/pages/eas/workflows/pre-packaged-jobs.mdx

    • Documentation for supported pre-packaged job types
    • Job-specific parameters and outputs

Do not rely on memorized values; these resources evolve as new features are added.

Workflow File Location

Workflows live in .eas/workflows/*.yml (or .yaml).

Top-Level Structure

A workflow file has these top-level keys:

  • name — Display name for the workflow
  • on — Triggers that start the workflow (at least one required)
  • jobs — Job definitions (required)
  • defaults — Shared defaults for all jobs
  • concurrency — Control parallel workflow runs

Consult the schema for the full specification of each section.

Expressions

Use ${{ }} syntax for dynamic values. The schema defines available contexts:

  • github.* — GitHub repository and event information
  • inputs.* — Values from workflow_dispatch inputs
  • needs.* — Outputs and status from dependent jobs
  • jobs.* — Job outputs (alternative syntax)
  • steps.* — Step outputs within custom jobs
  • workflow.* — Workflow metadata

Read the full file on GitHub · 93 lines

Files

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.

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. 1mo ago First seen · 93 lines · 60 tokens per session scan A 484e1867238a

Subscribe to this mod's changes

expo-cicd-workflows is a skill published in the GitHub repository zai-org/Synapse (488 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 60 tokens to every session and 791 once invoked, about $0.0002 per session on Opus 5.5. 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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