What is eas-build-error?

A command that checks the latest Expo Application Services build and shows its status and failure logs. Expo Application Services is a cloud service for building mobile apps for iOS and Android.

Use it to inspect the latest iOS or Android build, retrieve errors, or investigate a particular EAS build.

It avoids searching through build dashboards and logs manually when a mobile build fails. It can inspect the newest build or a specific build by ID.

eas-build-error — Skill for Claude Code by flurdy/agent-skills

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.

Any agent

npx skills add flurdy/agent-skills --skill eas-build-error

Clone the repo

git clone --depth 1 https://github.com/flurdy/agent-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/flurdy/agent-skills/eas-build-error/github.svg)](https://agentmods.dev/skills/flurdy/agent-skills/eas-build-error)

Your own site

<a href="https://agentmods.dev/skills/flurdy/agent-skills/eas-build-error"><img src="https://agentmods.dev/badge/skills/flurdy/agent-skills/eas-build-error/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/flurdy/agent-skills/eas-build-error"><img src="https://agentmods.dev/badge/skills/flurdy/agent-skills/eas-build-error.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,028 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00036	$0.01028
Opus 5.5	$0.00014	$0.00411
Sonnet 5.5	$0.00007	$0.00206
Haiku 4.5	$0.00004	$0.00103

Measured 1mo ago against content hash a582a1c7c99d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

eas-build-error 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.

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/eas-build-error/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

EAS Build Error - View latest build status and errors

Show the status and errors from the latest EAS build.

Usage

/eas-build-error              # Latest build (any platform)
/eas-build-error ios           # Latest iOS build
/eas-build-error android       # Latest Android build
/eas-build-error <build-id>    # Specific build by ID

Implementation

Step 1: Get the build

Parse the argument to determine what to fetch:

If argument looks like a UUID (contains hyphens, 36 chars): treat as build ID
```
npx eas build:view <build-id> --json
```

If argument is ios or android: filter by platform

npx eas build:list --limit=1 --platform=<platform> --json --non-interactive

If no argument: get latest build across all platforms

npx eas build:list --limit=1 --json --non-interactive

Step 2: Display build summary

From the JSON output, extract and display:

## EAS Build: <STATUS>

| Field       | Value                          |
|-------------|--------------------------------|
| ID          | <id>                           |
| Platform    | <platform>                     |
| Profile     | <buildProfile>                 |
| Status      | <status> (with emoji: ✓/✗/⏳)  |
| Commit      | <gitCommitHash> <gitCommitMessage> |
| Started     | <createdAt>                    |
| Duration    | <computed from metrics>        |
| Logs        | <link to expo.dev>             |

Step 3: Show errors (if build failed)

If status is ERRORED or CANCELED:

Show the error field from the JSON:
```
### Error
<error.message>
```
Fetch detailed logs — try each URL in logFiles array:
- Use WebFetch on each log URL
- Extract error lines, warnings, and failure details
- If URLs return 404 (expired), note that logs have expired
Try xcode build logs if available:
- Check artifacts.xcodeBuildLogsUrl
- Fetch and extract compilation errors

If all log URLs have expired, tell the user:

Log URLs have expired (15-minute TTL).
View full logs at: <expo.dev link>

Read the full file on GitHub · 126 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.

1mo ago First seen · 126 lines · 36 tokens per session scan A a582a1c7c99d

Subscribe to this mod's changes

eas-build-error is a skill published in the GitHub repository flurdy/agent-skills (9 stars, last pushed yesterday), licensed MIT. It adds 36 tokens to every session and 1,028 once invoked, about $0.0001 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 2026-08-31.

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