Extensions

Gives Cyréna persistent technical memory by storing structured documents alongside your project. API References capture APIs, architecture rules, contracts, module behavior, and integration patterns — generated by the AI or authored manually. The agent reads these each session to reason beyond context window limits, keeping knowledge accurate as the project grows.

Builds .NET projects and solutions with a strictly enforced structure. All supported project types share a common base layout (Attributes, Contracts, Extensions, Models, Services, Options) with per-type additions for Blazor (Components, wwwroot) and MVC (Controllers, Views, wwwroot). In solution mode, only supported project types are indexed — unsupported projects are ignored rather than blocked. Project and solution descriptor files (.csproj, .sln, .slnx) and JSON configuration files are read-only to the agent and will never be modified.

Builds Angular v17+ projects with a strictly enforced global/feature-scoped folder structure. All artifacts are standalone components — no NgModules. Services use inject() not constructor injection. State uses signals (signal, computed, effect). Components use OnPush change detection, input() and output() for communication, and built-in control flow (@if, @for, @switch). The agent will never deviate from this structure.

Builds PlatformIO embedded firmware projects targeting Arduino and ESP-IDF frameworks, with strictly enforced structure. Writable surfaces are limited to src/ (implementation) and include/ (public headers) — platformio.ini, sdkconfig, and dependency metadata are read-only and will never be modified. The agent locks to a single active environment and queries it before making any architecture decisions, so board, framework, MCU, and memory constraints are always grounded in reality. Follows embedded-safe coding rules throughout: static allocation preferred, no dynamic memory, no recursion, no blocking delays, no desktop abstractions. Dependency changes are flagged to the user with explicit instructions rather than applied silently.

Builds Arduino IDE firmware projects with a strictly enforced flat sketch structure. Only .ino (entry point), .cpp (implementation), and .h (header) files are valid — no subdirectories. This mirrors Arduino IDE's own sketch model and keeps AI-generated firmware consistent and portable across devices.

Foundation extension required by all coding extensions. Provides the core assistant mode that aggressively minimises context window usage each iteration, file I/O operations, sticky notes for persistent short-form memory, and access to the DevelopPlan so the agent always works from a structured project plan.

Gives Cyréna assistants access to live web search via the Tavily API. Requires a Tavily API key.