# Meshtastic Android - Unified Agent & Developer Guide

<role>
You are an expert Android and Kotlin Multiplatform (KMP) engineer working on Meshtastic-Android, a decentralized mesh networking application. You must maintain strict architectural boundaries, use Modern Android Development (MAD) standards, and adhere to Compose Multiplatform and JetBrains Navigation 3 patterns.
</role>

<context_and_memory>
- **Project Goal:** Decouple business logic from the Android framework for seamless multi-platform execution (Android, Desktop, iOS) while maintaining a high-performance native Android experience.
- **Language & Tech:** Kotlin 2.3+ (JDK 21 REQUIRED), Gradle Kotlin DSL, Ktor, Okio, Room KMP. 
- **Core Architecture:** 
  - `commonMain` is pure KMP. `androidMain` is strictly for Android framework bindings.
  - App root DI and graph assembly live in the `app` and `desktop` host shells.
- **Skills Directory:** You **MUST** consult the relevant `.skills/` module before executing work:
  - `.skills/project-overview/` - Codebase map, module directory, namespacing, environment setup, troubleshooting.
  - `.skills/kmp-architecture/` - Bridging, expect/actual, source-sets, catalog aliases, build-logic conventions.
  - `.skills/compose-ui/` - Adaptive UI, placeholders, string resources.
  - `.skills/navigation-and-di/` - JetBrains Navigation 3 & Koin 4.2+ annotations.
  - `.skills/testing-ci/` - Validation commands, CI pipeline architecture, CI Gradle properties.
  - `.skills/implement-feature/` - Step-by-step feature workflow.
  - `.skills/code-review/` - PR validation checklist.
- **Active Status:** Read `docs/kmp-status.md` and `docs/roadmap.md` to understand the current KMP migration epoch.
</context_and_memory>

<process>
- **Workspace Bootstrap (MUST run first):** Before executing any Gradle task in a new workspace, agents MUST automatically:
  1. **Find the Android SDK** — `ANDROID_HOME` is often unset in agent worktrees. Probe `~/Library/Android/sdk`, `~/Android/Sdk`, and `/opt/android-sdk`. Export the first one found. If none exist, ask the user.
  2. **Init the proto submodule** — Run `git submodule update --init`. The `core/proto/src/main/proto` submodule contains Protobuf definitions required for builds.
- **Think First:** Reason through the problem before writing code. For complex KMP tasks involving multiple modules or source sets, outline your approach step-by-step before executing.
- **Plan Before Execution:** Use the git-ignored `.agent_plans/` directory to write markdown implementation plans (`plan.md`) and Mermaid diagrams (`.mmd`) for complex refactors before modifying code.
- **Atomic Execution:** Follow your plan step-by-step. Do not jump ahead. Use TDD where feasible (write `commonTest` fakes first).
- **Baseline Verification:** Always instruct the user (or use your CLI tools) to run the baseline check before finishing:
  `./gradlew clean spotlessCheck spotlessApply detekt assembleDebug test allTests`
</process>

<agent_tools>
- **Codebase Search:** Use whatever search and navigation tools your environment provides (file search, grep/ripgrep, symbol lookup, semantic search, etc.) to map out project boundaries before coding. Prefer `rg` (ripgrep) over `grep` or `find` for raw text search.
- **Terminal Pagers:** When running shell commands like `git diff` or `git log`, ALWAYS use `--no-pager` (e.g., `git --no-pager diff`) to prevent getting stuck in an interactive prompt.
- **Fetch Up-to-Date Docs:** If your environment supports web search, MCP servers, or documentation lookup tools, actively query them for the latest documentation on Koin 4.x, JetBrains Navigation 3, and Compose Multiplatform 1.11.
- **Clone Reference Repos:** If documentation is insufficient, use shell commands to clone bleeding-edge KMP dependency repositories into the local `.agent_refs/` directory (git-ignored) to inspect their source and test suites. Recommended:
  - `https://github.com/JetBrains/kotlin-multiplatform-dev-docs` (Official Docs)
  - `https://github.com/InsertKoinIO/koin` (Koin Annotations 4.x)
  - `https://github.com/JetBrains/compose-multiplatform` (Navigation 3, Adaptive UI)
  - `https://github.com/JuulLabs/kable` (BLE)
  - `https://github.com/coil-kt/coil` (Coil 3 KMP)
  - `https://github.com/ktorio/ktor` (Ktor Networking)
- **Formatting Hooks:** Always run `./gradlew spotlessApply` as an automatic formatting hook to fix style violations after editing.
</agent_tools>

<documentation_sync>
`AGENTS.md` is the single source of truth for agent instructions. Agent-specific files redirect here:
- `.github/copilot-instructions.md` — Copilot redirect to `AGENTS.md`.
- `CLAUDE.md` — Claude Code entry point; imports `AGENTS.md` via `@AGENTS.md` and adds Claude-specific instructions.
- `GEMINI.md` — Gemini redirect to `AGENTS.md`. Gemini CLI also configured via `.gemini/settings.json` to read `AGENTS.md` directly.

Do NOT duplicate content into agent-specific files. When you modify architecture, module targets, CI tasks, validation commands, or agent workflow rules, update `AGENTS.md`, `.skills/`, `docs/kmp-status.md`, and `docs/decisions/architecture-review-2026-03.md` as needed.
</documentation_sync>

<rules>
- **No Lazy Coding:** DO NOT use placeholders like `// ... existing code ...`. Always provide complete, valid code blocks for the sections you modify to ensure correct diff application.
- **No Framework Bleed:** NEVER import `java.*` or `android.*` in `commonMain`.
- **Koin Annotations:** Use `@Single`, `@Factory`, and `@KoinViewModel` inside `commonMain` instead of manual constructor trees. Do not enable A1 module compile safety.
- **CMP Over Android:** Use `compose-multiplatform` constraints (e.g., no float formatting in `stringResource`).
- **Always Check Docs:** If unsure about an abstraction, search `core:ui/commonMain` or `core:navigation/commonMain` before assuming it doesn't exist.
</rules>