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debugging-capacitor

debugging-capacitor is a skill for Claude Code from Cap-go/capgo-skills. It costs 261 tokens per session (2,995 once invoked), scanned A, original, MIT.

A debugging guide for Capacitor applications, which are mobile apps built with web technologies and packaged for iOS or Android. It covers WebView, native code, crashes, and network problems.

In plain words
What is it for?
Use it to investigate bugs, crashes, failed network requests, and other problems in Capacitor apps.
Why use it?
It helps identify whether a mobile bug comes from the web interface, native platform code, network requests, or a crash.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the capacitor-quality plugin — 7 skills shipped together

not rated 73repo +1 changed 8d ago A scan Socket: passSnyk: pass 261 tokens original MIT

Good fit Use it to investigate bugs, crashes, failed network requests, and other problems in Capacitor apps.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cap-go/capgo-skills/debugging-capacitor
View source ↗ Cap-go/capgo-skills capgo.app
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 Cap-go/capgo-skills --skill debugging-capacitor
Clone the repo
git clone --depth 1 https://github.com/Cap-go/capgo-skills

Made for: Claude Code.

Or install capacitor-quality, the plugin that ships this one along with the rest of its 7 skills.

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 debugging-capacitor

README.md
[![agentmods](https://agentmods.dev/badge/skills/cap-go/capgo-skills/debugging-capacitor/github.svg)](https://agentmods.dev/skills/cap-go/capgo-skills/debugging-capacitor)
Your own site
<a href="https://agentmods.dev/skills/cap-go/capgo-skills/debugging-capacitor"><img src="https://agentmods.dev/badge/skills/cap-go/capgo-skills/debugging-capacitor/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 debugging-capacitor

Your own site · 80×15
<a href="https://agentmods.dev/skills/cap-go/capgo-skills/debugging-capacitor"><img src="https://agentmods.dev/badge/skills/cap-go/capgo-skills/debugging-capacitor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 261 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,995 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
  • Socket pass 11 Oct 2026
  • Snyk pass 11 Oct 2026
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 $0.00261 $0.02995
Opus 5.5 $0.00104 $0.01198
Sonnet 5.5 $0.00052 $0.00599
Haiku 4.5 $0.00026 $0.00299

Measured 8d ago against content hash cb47111216db, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

debugging-capacitor 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 8d 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.

plugins/capacitor-quality/skills/debugging-capacitor/SKILL.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Debugging Capacitor Apps

Find which layer is broken (web, bridge, native, OS config), prove it with the right inspector, then fix the smallest thing.

When to Use

TRIGGER when:

  • App shows a white/blank screen, crashes on launch, or freezes after a native call.
  • Error "<Name>" plugin is not implemented on ios|android or "<Name>.<method>()" is not implemented on ....
  • Network calls fail on device only: net::ERR_CLEARTEXT_NOT_PERMITTED, ATS "requires the use of a secure connection", CORS errors.
  • Permission prompts never appear or always deny.
  • Live reload (cap run --url, server.url) shows a blank page or "Webpage not available".
  • After updating to Capacitor 8.5+ / Xcode 27: appUrlOpen silent, universal links open the app but do nothing, JS pause/resume or custom AppDelegate code no longer runs.
  • User asks "how do I debug / inspect my Capacitor app".

Do not use:

  • Only need to stream, filter, or save logs or crash reports -> ios-android-logs.
  • Performing the AppDelegate -> SceneDelegate migration itself -> capacitor-uiscene-migration.
  • Setting up deep links, AASA, assetlinks from scratch -> capacitor-deep-linking.
  • Jank, slow startup, bundle size, memory tuning -> capacitor-performance.
  • Sentry / Crashlytics / Datadog in production -> capacitor-native-observability.
  • Writing unit/E2E tests -> capacitor-testing. AI/MCP device automation -> capacitor-mcp.
  • Gradle/Xcode build failures from version bumps -> capacitor-app-upgrades; Pods/SPM resolution -> cocoapods-to-spm.
  • Push token/delivery issues -> capacitor-push-notifications; keyboard overlap -> capacitor-keyboard; notch/insets -> safe-area-handling.

Triage Workflow

  1. Collect facts before touching code: platform(s), simulator vs device, debug vs release, Capacitor version (npx cap doctor), what changed last (upgrade, plugin added, config edit), exact error text.
  2. Classify the layer:
    • JS exception, failed fetch, bad route -> web layer: open the WebView inspector (Safari / chrome://inspect). See references/webview-inspection.md.
    • plugin is not implemented -> bridge/registration: the native code is not in the binary or JS cannot be injected. See Error Handling below.
    • Process dies / EXC_BAD_ACCESS / FATAL EXCEPTION -> native layer: run from Xcode / Android Studio with the debugger attached. See references/native-debugging.md.
    • Works on Android but not iOS after 8.5/Xcode 27, link/lifecycle related -> UIScene. See references/uiscene-regressions.md.
  3. Reproduce with a fresh sync: npm run build && npx cap sync then rebuild native. Stale public/ assets and un-synced plugins cause most "works in browser, broken on device" reports.
  4. Read the native console for Capacitor's own messages. iOS prints ⚡️ Loading app at ..., ⚡️ [log] - ..., ⚡️ ERROR: Unable to load ... to stdout (visible in Xcode's console, simctl launch --console-pty, devicectl ... launch --console; not in Console.app). Android logs under tag Capacitor and JS console under Capacitor/Console. Log commands live in ios-android-logs.
  5. Report the root cause and proposed fix to the user before invasive changes (deleting ios//android/, editing project.pbxproj, disabling ATS globally).
  6. Apply the fix, then run the Verification steps.

Read the full file on GitHub · 119 lines

Files

What ships with it

6 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. 8d ago Changed · -327 lines · +212 tokens per session scan C → A cb47111216db
  2. 1mo ago First seen · 446 lines · 49 tokens per session scan C d5a0842c9506

Subscribe to this mod's changes

debugging-capacitor is a skill published in the GitHub repository Cap-go/capgo-skills (73 stars, last pushed 2d ago), licensed MIT. It adds 261 tokens to every session and 2,995 once invoked, about $0.0010 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.

DebuggingMobileagentsaicapacitorcapacitor-skillscapgoskills
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