agentCLAWHUBUnverified

Ios Keyboard Limitations

iOS keyboard extension technical limitations and workarounds. Use when planning or building iOS custom keyboards with voice/audio features, dictation, or system integration needs. Covers memory limits, sandbox restrictions, microphone access, app launching, and viable alternative architectures. Skill: Ios Keyboard Limitations Summary: iOS keyboard extension technical limitations and workarounds. Use when planning or building iOS custom keyboards with voice/audio features, dictation, or system integration needs. Covers memory limits, sandbox restrictions, microphone access, app launching, and viable alternative architectures. Tags: latest:1.0.0 Version history: v1.0.0 | 2026-02-11T01:11:42.344Z | auto - Init

OpenClaw

Rank

62

Safety

84

Downloads

1.9k

Updated

Oct 9, 2026

Version

1.0.0

Source

CLAWHUB

About

What it does, and when to use it.

Capability contract not published. No trust telemetry is available yet. 1.9K downloads reported by the source. Last updated 10/9/2026.

Avoid when

  • Contract metadata is missing or unavailable for deterministic execution.

Risk flags: missing_or_unavailable_contract, trust_data_unavailable, schema_references_missing

Public facts

Every fact links back to the source it came from.

Vendor
Clawhubvendor · observed Oct 9, 2026
Protocol compatibility
OpenClawcompatibility · observed Oct 9, 2026
Adoption signal
1.9K downloadsadoption · observed Oct 9, 2026
Latest release
1.0.0release · observed Feb 11, 2026
Handshake status
UNKNOWNsecurity

Install and run

Setup complexity: low.

clawhub skill install unknown:ios-keyboard-limitations
  1. Setup complexity is LOW. This package is likely designed for quick installation with minimal external side-effects.
  2. Final validation: Expose the agent to a mock request payload inside a sandbox and trace the network egress before allowing access to real customer data.

Contract: missing

curl -s "https://www.xpersona.co/api/v1/agents/clawhub-unknown-ios-keyboard-limitations/snapshot"

Documentation

CLAWHUB

8,869 characters of source documentation, loaded on request.

Extracted files

3 files captured from the source.

SKILL.md

---
name: ios-keyboard-limitations
description: iOS keyboard extension technical limitations and workarounds. Use when planning or building iOS custom keyboards with voice/audio features, dictation, or system integration needs. Covers memory limits, sandbox restrictions, microphone access, app launching, and viable alternative architectures.
---

# iOS Keyboard Extension Limitations

When building iOS custom keyboards with voice/audio features, these are the hard limitations discovered through the PolyVoice project.

## 🔴 Hard Limitations (Cannot be worked around)

### 1. Microphone Access — DISALLOWED
**Keyboard extensions cannot access the microphone.**

- `AVAudioRecorder` will fail with permission error
- `SFSpeechRecognizer` is unavailable
- No Siri integration from keyboard context

**Why:** Apple security model — keyboards run in sandbox and could keylog audio.

### 2. Open Other Apps — BLOCKED
**Keyboards cannot programmatically open the main app or any other app.**

- `UIApplication.shared.open()` returns false
- URL schemes don't work (`myapp://`)
- ` ExtensionContext.open()` not available

**Why:** Prevents malicious keyboards from launching apps without user consent.

### 3. Memory Limit — ~50MB
**Keyboard extensions have strict memory limits (~30-60MB).**

- App terminated silently if exceeded
- No crash log, just disappears
- Heavy audio processing = instant death

**Mitigation:**
- Record at 16kHz mono (not 44.1kHz)
- Use 32kbps bitrate max
- Immediate file cleanup after processing
- 60-second max recording hard limit

### 4. No Persistent Storage
**UserDefaults unavailable, only App Groups.**

- Standard `UserDefaults` doesn't persist
- Must use `UserDefaults(suiteName: "group.com.company.app")`
- Requires App Group capability in both targets

### 5. Network Requires "Full Access"
**API calls fail without user enabling "Allow Full Access" in Settings.**

- User must explicitly enable: Settings → General → Keyboard → [Keyboard Name] → Allow Full Access
- Most users won't do this
- Cannot prompt or explain from keyboard UI effectively

## 🟡 Partial Workarounds (User friction)

### The "Open App" Workaround
**Goal:** Let user tap a button to open main app for recording.

**Attempt:**
```swift
// This does NOT work
extensionContext?.open(URL(string: "myapp://record")!)
```

**Reality:** Must use `UIApplication.shared.open()` outside extension context, but keyboards can't call this.

### The Manual Switch Pattern
**What actually works (with friction):**

1. **User taps button in keyboard** → Shows alert: "Open PolyVoice to record?"
2. **User manually switches to main app** (Home button, swipe, etc.)
3. **Main app detects active session** (via App Groups / shared state)
4. **Main app auto-records** on appear
5. **Auto-stops on silence** (2 seconds)
6. **Auto-copies** to clipboard
7. **User manually switches back** to target app
8. **Keyboard auto-pastes** on reappear

**User flow:**
```
Keyboard → Tap mic → [Manual: Switch to app] → A

_meta.json

{
  "ownerId": "kn726ec4pwa3p1dg7mtf5eg8vn809q0t",
  "slug": "ios-keyboard-limitations",
  "version": "1.0.0",
  "publishedAt": 1770772302344
}

skill-card.md

## Description:

Provides iOS keyboard extension technical limitations and workarounds for planning or building custom keyboards with voice/audio features, dictation, or system integration needs.

This skill is ready for commercial/non-commercial use.

## Publisher:

[usimic](https://clawhub.ai/user/usimic)

### License/Terms of Use:


## Use Case:

Developers and engineers use this skill to assess whether an iOS custom keyboard is viable for voice, dictation, networking, storage, or app-integration features and to compare supported alternatives such as share extensions, full app flows, and Siri Shortcuts.

### Deployment Geography for Use:

Global

## Known Risks and Mitigations:

Risk: Keyboard Full Access is sensitive for users and may create privacy concerns when networking or shared data access is required.

Mitigation: Explain why Full Access is needed in the companion app and avoid requiring it unless the keyboard feature cannot work without network access.

Risk: Voice and audio features inside a keyboard extension can lead to non-working flows because the extension cannot access the microphone and has strict sandbox limits.

Mitigation: Use the skill's recommended supported alternatives, such as a share extension, full app mode, or Siri Shortcuts, before committing to a keyboard-based voice workflow.

Risk: Manual app-switching and clipboard-based workarounds can interrupt the user flow or expose text to clipboard overwrite behavior.

Mitigation: Reserve these patterns for fallback flows and document the expected user steps and clipboard behavior clearly.

## Reference(s):

- [Apple: Creating a Custom Keyboard](https://developer.apple.com/documentation/uikit/keyboards_and_input/creating_a_custom_keyboard)

## Skill Output:

**Output Type(s):** [guidance, analysis, markdown, code, configuration]

**Output Format:** [Markdown guidance with inline Swift examples, architectural options, and a decision matrix]

**Output Parameters:** [1D]

**Other Properties Related to Output:** [Documentation-only; no bundled code execution.]

## Skill Version(s):

1.0.0 (source: server release metadata)

## Ethical Considerations:

Users should evaluate whether this skill is appropriate for their environment, review any generated or modified files before relying on them, and apply their organization's safety, security, and compliance requirements before deployment.
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Machine-readable data

The same record, as JSON, for agents and crawlers.

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Record generated Oct 10, 2026.

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