gazebolisted

# gazebo The sim half of the robium nav-vertical trial run: modern Gazebo (the `gz` tools — Gazebo Classic/`gazebo11` is a separate, EOL project and out of scope everywhere in this skill) for building SDF worlds and models, attaching sensors, bridging topics to ROS 2 via `ros_gz`, spawning robots, and running headless. as of 2026-07-10, Gazebo's current named releases are **Jetty** (LTS, Sep 2025 – May 2031), **Ionic** (standard support, Sep 2024 – Dec 2026), and **Harmonic** (LTS, Sep 2023 – May 2029) — verified by direct `curl` of `gazebosim.org/docs/all/releases/` on 2026-07-10, which also lists the older Fortress LTS (Sep 2021 – May 2027) still inside its support window. Jetty is now the newest LTS, one release past the Harmonic/Ionic line named in this skill's description; re-verify the release list before trusting any of this paragraph in a future session; see `references/worlds-and-models.md`'s sourcing note. The robium nav vertical (`nav2` skill) targets ROS 2 **Jazzy Jalisco**, whose paired Gazebo release is **Harmonic** — the `ros_gz` `jazzy` branch ships prebuilt binaries for that pairing from packages.ros.org, confirmed by direct fetch of the `ros_gz` README this session (see References). This skill's nav-facing snippets and examples target Jazzy + Harmonic for that reason; Ionic (paired with Kilted) is nearing its Dec 2026 EOL, and Jetty (the newest LTS) pairs with Lyrical or Rolling, not Jazzy — don't pick either for a new Jazzy-based project without re-checkin