# Agentic coding on mobile: plan, act, ship > Source: > Published: 2026-07-05 00:00:00+00:00 # Agentic coding on mobile: plan, act, ship How plan and agent modes change mobile development, why bring-your-own-key matters, and what a coding agent can do on a phone that a chat app cannot. Treena Chatbots can suggest code. **Agents can change systems.** That distinction is why mobile finally works for real software work. A chat transcript is not an IDE. An agent with tools inside a workspace is. ## Plan mode vs Agent mode Treena exposes two deliberate modes: ### Plan mode The agent drafts a step-by-step approach. You approve before anything is written. Ideal when: - You are new to the repo - The change touches auth, billing, or data - You want a mental model before execution ### Agent mode The agent edits, runs commands, and iterates until the task is done (or blocked). Ideal when: - The task is well-scoped - You trust the surrounding tests - Speed matters more than ceremony One toggle. Same conversation. Different risk profiles. ## Tools beat pure text A useful mobile agent must be able to: - Read and search files - Apply patches - Run the terminal - Observe errors and try again - Produce a reviewable diff Without tools, you are copy-pasting into a chat window. With tools, the phone becomes a **remote operations console** for your codebase. ## Bring your own key First release philosophy: **your model, your credentials.** Connect OpenRouter, OpenAI, Anthropic, or account-linked flows like Codex and Claude Code. You keep control of cost, policy, and provider choice. Treena is the environment and the loop, not a locked model tax. ## What "done" means on mobile Done is not "the agent said something smart." Done is: - Tests green (or a clear reason they are not) - Diff reviewed - Commit created - Push to GitHub If those four can happen on a phone, mobile is not a niche. It is a first-class development surface. ## The future is pocket-scale Software is becoming less about sitting still and more about **being available when the idea (or the incident) arrives**. Agentic mobile IDEs close the gap between "I noticed it" and "I shipped the fix." That is the future Treena is building toward. [Join the waitlist](/#waitlist), and keep your laptop optional.