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 Xopoko/build-swift-apps --skill appstore-crash-insightsgit clone --depth 1 https://github.com/Xopoko/build-swift-appsWrote 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/xopoko/build-swift-apps/appstore-crash-insights)<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-crash-insights"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-crash-insights/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/xopoko/build-swift-apps/appstore-crash-insights"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-crash-insights.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00033 | $0.00565 |
| Opus 5 | $0.00016 | $0.00282 |
| Sonnet 5 | $0.00007 | $0.00113 |
| Haiku 4.5 | $0.00003 | $0.00056 |
Grade A, and why
appstore-crash-insights 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.
App Store Crash Insights
Fetch, analyze, and summarize TestFlight crash reports, beta feedback, and performance diagnostics.
Workflow
- Resolve app ID with
asc apps listif missing. - Resolve build ID when diagnostics need one.
- Fetch JSON with the narrowest useful command.
- Group by severity/frequency and summarize in human terms.
Commands
Crashes:
asc testflight crashes list --app "APP_ID" --sort -createdDate --limit 10
asc testflight crashes list --app "APP_ID" --build "BUILD_ID" --sort -createdDate --limit 10
asc testflight crashes list --app "APP_ID" --device-model "iPhone16,2" --os-version "18.0"
asc testflight crashes list --app "APP_ID" --paginate
Feedback:
asc testflight feedback list --app "APP_ID" --sort -createdDate --limit 10
asc testflight feedback list --app "APP_ID" --sort -createdDate --limit 10 --include-screenshots
asc testflight feedback list --app "APP_ID" --build "BUILD_ID" --sort -createdDate
asc testflight feedback list --app "APP_ID" --paginate
Performance diagnostics:
asc builds info --app "APP_ID" --latest --platform IOS
asc builds list --app "APP_ID" --sort -uploadedDate --limit 5
asc performance diagnostics list --build "BUILD_ID"
asc performance diagnostics list --build "BUILD_ID" --diagnostic-type "HANGS"
asc performance diagnostics view --id "SIGNATURE_ID"
asc performance download --build "BUILD_ID" --output ./metrics.json
Diagnostic types: HANGS, DISK_WRITES, LAUNCHES.
Resolve IDs with asc apps list --name "AppName", asc apps list --bundle-id "com.example.app", or export ASC_APP_ID="APP_ID".
Summary
Report total count, top crash signatures, affected builds, device/OS breakdown,
timeline/spikes, and highest-weight performance signatures. Output defaults are
TTY-aware: interactive terminals use tables, while pipes, files, and CI use
JSON. Pass --output json explicitly for automation, use table/markdown for
quick human review, --paginate for full analysis, and --pretty for JSON
debugging. ASC crash data can lag 24-48h.
What ships with it
1 file 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.
- 12d ago First seen · 60 lines · 33 tokens per session scan A a3825ea1adff
appstore-crash-insights is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 15d ago), licensed MIT. It adds 33 tokens to every session and 565 once invoked, about $0.0002 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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