Android Hidden API and R8 Check
gkd-kit/gkd
Checks whether Android hidden-API implementations and system callbacks survive R8 minification, and diagnoses Release-only failures such as AbstractMethodError.
Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
Install Earllm Build
$ npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sickn33/agentic-awesome-skills earllm-build --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/earllm-build .claude/skills/earllm-build && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "earllm-build" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-build into .claude/skills/earllm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "earllm-build", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-buildType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sickn33/agentic-awesome-skills earllm-build --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/earllm-build .agents/skills/earllm-build && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "earllm-build" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-build into .agents/skills/earllm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "earllm-build", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sickn33/agentic-awesome-skills earllm-build --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/earllm-build .cursor/skills/earllm-build && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "earllm-build" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-build into .cursor/skills/earllm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "earllm-build", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sickn33/agentic-awesome-skills.git --path skills/earllm-build--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sickn33/agentic-awesome-skills earllm-build --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/earllm-build .gemini/skills/earllm-build && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "earllm-build" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-build into .gemini/skills/earllm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "earllm-build", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sickn33/agentic-awesome-skills earllm-buildInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/earllm-build .github/skills/earllm-build && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "earllm-build" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-build into .github/skills/earllm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "earllm-build", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sickn33/agentic-awesome-skills earllm-build --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/earllm-build .opencode/skills/earllm-build && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "earllm-build" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/earllm-build into .opencode/skills/earllm-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "earllm-build", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
earllm-build- GitHub stars
- 47k
- Used in
- 2 other repos
- Token cost
- ~2k tokens
- SKILL.md length
- 851 words
- Files
- 1
- Skills in repo
- 1,497
- Repo updated
- First seen
- Licence
- MIT
At a glance
Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
- Works in 7 steps: Bluetooth SCO is limited to 8kHz mono… → startBluetoothSco() is deprecated since… → Samsung One UI 7/8 has a known HFP… → …
- Tasks that involve Android development
- SKILL.md covers Overview, When to Use This Skill, Do Not Use This Skill When and How It Works, plus 18 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Earllm Build is an agent skill from sickn33/agentic-awesome-skills. Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Mobile, covering Android development. It works with Android and Kotlin. The repository describes itself as: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.
When your agent uses it
- Tasks that involve Android development
Example prompts
- “/earllm-build”
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Bluetooth SCO is limited to 8kHz mono input on most devices. Some support 16kHz mSBC. BLE Audio (Android 12+, TYPE_BLE_HEADSET = 26)…
- startBluetoothSco() is deprecated since Android 12 (API 31). Use AudioManager.setCommunicationDevice(AudioDeviceInfo) and…
- Samsung One UI 7/8 has a known HFP corruption bug where A2DP playback corrupts the SCO link. The app handles this with silence detection…
- Redmi Buds 6 Pro tap controls must be set to "Default" (Play/Pause) in the Xiaomi Earbuds companion app. If set to ANC or custom…
- Android 14+ requires FOREGROUND_SERVICE_MICROPHONE permission and foregroundServiceType="microphone" in the service declaration…
- VOICE_COMMUNICATION audio source enables AEC (Acoustic Echo Cancellation), which is critical to prevent TTS audio output from feeding back…
- Never play TTS (A2DP) while simultaneously recording via SCO. The correct sequence is: stop playback → switch to HFP → record → switch to…
What it can do on your machine
Read from SKILL.md and the folder at commit b84d35a. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are powershell and bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Earllm Build loads about 2k tokens when it runs. Until then it costs about 39 tokens; SKILL.md has 851 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from sickn33/agentic-awesome-skills at commit b84d35a, republished under its MIT licence (© sickn33). 851 words, ~2,038 tokens.
Download SKILL.mdSave it as
.claude/skills/earllm-build/SKILL.md (or your agent's skills folder).- name
- earllm-build
- description
- Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
- risk
- safe
- source
- community
- date_added
- 2026-03-06
- author
- renat
- tags
- android, kotlin, bluetooth, llm, voice
- tools
- claude-code, antigravity, cursor, gemini-cli, codex-cli
EarLLM One — Build & Maintain
Overview
Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
When to Use This Skill
- When the user mentions "earllm" or related topics
- When the user mentions "earbudllm" or related topics
- When the user mentions "earbud app" or related topics
- When the user mentions "voice pipeline kotlin" or related topics
- When the user mentions "bluetooth audio android" or related topics
- When the user mentions "sco microphone" or related topics
Do Not Use This Skill When
- The task is unrelated to earllm build
- A simpler, more specific tool can handle the request
- The user needs general-purpose assistance without domain expertise
How It Works
EarLLM One is a multi-module Android app (Kotlin + Jetpack Compose) that captures voice from Bluetooth earbuds, transcribes it, sends it to an LLM, and speaks the response back.
Project Location
C:\Users\renat\earbudllm
Module Dependency Graph
app ──→ voice ──→ audio ──→ core-logging
│ │
├──→ bluetooth ──→ core-logging
└──→ llm ──→ core-loggingModules And Key Files
| Module | Purpose | Key Files |
|---|---|---|
| core-logging | Structured logging, performance tracking | EarLogger.kt, PerformanceTracker.kt |
| bluetooth | BT discovery, pairing, A2DP/HFP profiles | BluetoothController.kt, BluetoothState.kt, BluetoothPermissions.kt |
| audio | Audio routing (SCO/BLE), capture, headset buttons | AudioRouteController.kt, VoiceCaptureController.kt, HeadsetButtonController.kt |
| voice | STT (SpeechRecognizer + Vosk stub), TTS, pipeline | SpeechToTextController.kt, TextToSpeechController.kt, VoicePipeline.kt |
| llm | LLM interface, stub, OpenAI-compatible client | LlmClient.kt, StubLlmClient.kt, RealLlmClient.kt, SecureTokenStore.kt |
| app | UI, ViewModel, Service, Settings, all screens | MainViewModel.kt, EarLlmForegroundService.kt, 6 Compose screens |
Build Configuration
- SDK: minSdk 26, targetSdk 34, compileSdk 34
- Build tools: AGP 8.2.2, Kotlin 1.9.22, Gradle 8.5
- Compose BOM: 2024.02.00
- Key deps: OkHttp, AndroidX Security (EncryptedSharedPreferences), DataStore, Media
Target Hardware
| Device | Model | Key Details |
|---|---|---|
| Phone | Samsung Galaxy S24 Ultra | Android 14, One UI 6.1, Snapdragon 8 Gen 3 |
| Earbuds | Xiaomi Redmi Buds 6 Pro | BT 5.3, A2DP/HFP/AVRCP, ANC, LDAC |
Critical Technical Facts
These are verified facts from official documentation and device testing. Treat them as ground truth when making decisions:
Bluetooth SCO is limited to 8kHz mono input on most devices. Some support 16kHz mSBC. BLE Audio (Android 12+,
TYPE_BLE_HEADSET = 26) supports up to 32kHz stereo. Always prefer BLE Audio when available.startBluetoothSco()is deprecated since Android 12 (API 31). UseAudioManager.setCommunicationDevice(AudioDeviceInfo)andclearCommunicationDevice()instead. The project already implements both paths inAudioRouteController.kt.Samsung One UI 7/8 has a known HFP corruption bug where A2DP playback corrupts the SCO link. The app handles this with silence detection and automatic fallback to the phone's built-in mic.
Redmi Buds 6 Pro tap controls must be set to "Default" (Play/Pause) in the Xiaomi Earbuds companion app. If set to ANC or custom functions, events are handled internally by the earbuds and never reach Android.
Android 14+ requires
FOREGROUND_SERVICE_MICROPHONEpermission andforegroundServiceType="microphone"in the service declaration.RECORD_AUDIOmust be granted beforestartForeground().VOICE_COMMUNICATIONaudio source enables AEC (Acoustic Echo Cancellation), which is critical to prevent TTS audio output from feeding back into the STT microphone input. Never change this source without understanding the echo implications.Never play TTS (A2DP) while simultaneously recording via SCO. The correct sequence is: stop playback → switch to HFP → record → switch to A2DP → play response.
Data Flow
Headset button tap
→ MediaSession (HeadsetButtonController)
→ TapAction.RECORD_TOGGLE
→ VoicePipeline.toggleRecording()
→ VoiceCaptureController captures PCM (16kHz mono)
→ stopRecording() returns ByteArray
→ SpeechToTextController.transcribe(pcmData)
→ LlmClient.chat(messages)
→ TextToSpeechController.speak(response)
→ Audio output via A2DP to earbudsShow full SKILL.md (348 more words)Show less
Adding A New Feature
- Identify which module(s) are affected
- Read existing code in those modules first
- Follow the StateFlow pattern — expose state via
MutableStateFlow/StateFlow - Update
MainViewModel.ktif the feature needs UI integration - Add unit tests in the module's
src/test/directory - Update docs if the feature changes behavior
Modifying Audio Capture
VoiceCaptureController.kthandles PCM recording at 16kHz mono- WAV headers use hex byte values (not char literals) to avoid shell quoting issues
- VU meter: RMS calculation → dB conversion → normalized 0-1 range
- Buffer size:
getMinBufferSize().coerceAtLeast(4096)
Changing Bluetooth Behavior
BluetoothController.ktmanages discovery, pairing, profile proxies- Earbuds detection uses name heuristics: "buds", "earbuds", "tws", "pods", "ear"
- Always handle both Bluetooth Classic and BLE Audio paths
Modifying The Llm Integration
LlmClient.ktdefines the interface — keep it genericStubLlmClient.ktfor offline testing (500ms simulated delay)RealLlmClient.ktuses OkHttp to call OpenAI-compatible APIs- API keys stored in
SecureTokenStore.kt(EncryptedSharedPreferences)
Generating A Build Artifact
After code changes, regenerate the ZIP:
## From Project Root
powershell -Command "Remove-Item 'EarLLM_One_v1.0.zip' -Force -ErrorAction SilentlyContinue; Compress-Archive -Path (Get-ChildItem -Exclude '*.zip','_zip_verify','.git') -DestinationPath 'EarLLM_One_v1.0.zip' -Force"Running Tests
./gradlew test --stacktrace # Unit tests
./gradlew connectedAndroidTest # Instrumented tests (device required)Phase 2 Roadmap
- Real-time streaming voice conversation with LLM through earbuds
- Smart assistant: categorize speech into meetings, shopping lists, memos, emails
- Vosk offline STT integration (currently stubbed)
- Wake-word detection to avoid keeping SCO open continuously
- Streaming TTS (Android built-in TTS does NOT support streaming)
Stt Engine Reference
| Engine | Size | WER | Streaming | Best For |
|---|---|---|---|---|
| Vosk small-en | 40 MB | ~10% | Yes | Real-time mobile |
| Vosk lgraph | 128 MB | ~8% | Yes | Better accuracy |
| Whisper tiny | 40 MB | ~10-12% | No (batch) | Post-utterance polish |
| Android SpeechRecognizer | 0 MB | varies | Yes | Online, no extra deps |
Best Practices
- Provide clear, specific context about your project and requirements
- Review all suggestions before applying them to production code
- Combine with other complementary skills for comprehensive analysis
Common Pitfalls
- Using this skill for tasks outside its domain expertise
- Applying recommendations without understanding your specific context
- Not providing enough project context for accurate analysis
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/earllm-build of sickn33/agentic-awesome-skills.
Open the folder on GitHubat commit b84d35a
Used in 2 other repositories
We found 11 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Earllm Build next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Earllm Build this skillsickn33/agentic-awesome-skills | 47k | 2 repos | ~2k | Automated safety check: Pass | MIT | |
| Android Hidden API and R8 Checkgkd-kit/gkd | 43k | — | ~1.5k | Automated safety check: Pass | GPL-3.0 | |
| Compose Multiplatform Patternsmonta-app/ocpp-emulator | 180 | 5 repos | ~2k | Automated safety check: Pass | Apache-2.0 | |
| Android Developmentdpconde/claude-android-skill | 336 | — | ~1.7k | Automated safety check: Pass | MIT | |
| Architecture Overclocknekomangaorg/Neko | 2.8k | — | ~1.4k | Automated safety check: Pass | Apache-2.0 | |
| Claude Android NinjaDrjacky/claude-android-ninja | 124 | — | ~5.2k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Earllm Build
What does Earllm Build do?
Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline. Earllm Build is an agent skill from sickn33/agentic-awesome-skills. Build, maintain, and extend the EarLLM One Android project — a Kotlin/Compose app that connects Bluetooth earbuds to an LLM via voice pipeline.
When should I use Earllm Build?
Earllm Build fits situations like: tasks that involve Android development.
How do I install Earllm Build in Claude Code?
Run `npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a claude-code`. Or copy the skill folder (skills/earllm-build in sickn33/agentic-awesome-skills) into .claude/skills/earllm-build in your project. Claude Code loads it when a task matches its description.
How do I install Earllm Build in Codex?
Run `npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a codex`. Or copy the skill folder (skills/earllm-build in sickn33/agentic-awesome-skills) into .agents/skills/earllm-build in your project. Codex loads it when a task matches its description.
Can I use Earllm Build in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sickn33/agentic-awesome-skills --skill earllm-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/earllm-build, .gemini/skills/earllm-build, .github/skills/earllm-build and .opencode/skills/earllm-build in your project.
What does Earllm Build need to run?
SKILL.md names no scripts, command-line tools or credentials: Earllm Build is instructions for the agent only.
Does Earllm Build access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Earllm Build safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Earllm Build use?
Earllm Build is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Earllm Build use?
About 2k tokens (SKILL.md is roughly 8.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Earllm Build?
Skills that share tags, products or a category with Earllm Build: Android Hidden API and R8 Check (gkd-kit/gkd, 43k stars), Compose Multiplatform Patterns (monta-app/ocpp-emulator, 180 stars), Android Development (dpconde/claude-android-skill, 336 stars) and Architecture Overclock (nekomangaorg/Neko, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Earllm Build?
sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,405 GitHub stars. The repository holds 1,497 skills in this directory. The repository was last updated on October 9, 2026.
Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.