Visora devlog — asset pipeline & Unity native bridge (18 commits)

Asset pipeline: from broken to trustworthy

Built out the 3D-asset workflow (search → download → import → verify) and then spent most of the effort hardening it against silent failures:

Added asset search/download/Unity-import tools (1a0bcd3, bf6a7d9), then refactored out dead backward-compat aliases (dda6c17).

Fixed real bugs found by actually running it: ambientCG downloads being wrongly rejected and Sketchfab results silently hidden (99d3f15), a wrong ambientCG download URL for 3D models (1d6e2ce), a crash on comma-separated port lists plus missing env-var docs (117e6e3), and .bin/.mtl companion files being incorrectly stripped out of glTF/OBJ archives (5cb1afa).

Discovered Sketchfab’s own search API ignores the query text entirely (verified live) — added web_search_assets, a SearXNG-primary/DuckDuckGo-fallback real web search to find a specific named model and extract its Sketchfab UID (4489725).

Biggest find: download_and_import_asset was reporting success=true even when Unity couldn’t actually parse the file (glTF with no importer installed → empty placeholder asset). Fixed to detect and reject that case explicitly instead of lying about success (8c4241b).

Native Unity bridge: first real compile & runtime test
com.visora.editor had apparently never been compiled in a real Unity Editor before. Opening it in Unity 6.6 surfaced a chain of genuine bugs, fixed one at a time: A broken float field that Unity’s JSON deserializer can’t handle, flattened to float on both C# and Python sides (08f502e, 4d05468).

Unity 6.6 API removals: GetInstanceID() → GetEntityId() (c8c8905), then GetEntityId()’s own obsolete int-conversion operator → GetRawData() (027e39c).

Two HTTP handlers (/api/editor/state, /api/visora/info) and a log-callback subscription were calling Unity APIs off the main thread, causing runtime errors — dispatched onto the main thread (d27e03f, 5e3069b).

Dynamic C# snippet compilation was missing a reference to UnityEditor.CoreModule, breaking any snippet touching EditorApplication/EditorSceneManager (a8689a9).

Agent guidance
Shipped documentation aimed at other agents driving Visora, not just humans: an always-on MCP instructions block plus a copyable Claude Code skill (visora-asset-workflow) covering Sketchfab’s broken search, supported import formats, and how to actually verify an import worked (4e8cd5c).

Housekeeping
Committed the 29 .meta files Unity generated on first real import of the package — standard Unity convention, and further confirmation the package had never been opened in a real editor before this round of testing (b9e4f01).

Net effect: the asset import pipeline no longer lies about success, Sketchfab search actually works for named models, and the native Unity bridge compiles and runs cleanly on Unity 6.6 — all verified end-to-end (ambientCG apple + a Sketchfab character model imported, inspected, and visually confirmed in-scene).