datnt-cell Unity Editor Tools
Part of the Unity Skills plugin.
Unity Skills protocol (quick reference)
This plugin talks to the Unity Editor through a local REST server. Before the first skill call in a session:
GET /health— discover the server (it binds a port in8090–8100). ReadcurrentMode("approval"/"auto"/"bypass") andsurfaceProfile(full/guide/noSceneAuthoring) — confirmprojectNamematches the project you're editing.- Under
approvalmode, the first write to aFullAutoskill returnsMODE_RESTRICTEDand needs a user grant; underauto/bypasswrites execute directly.
dryRun gate: before executing any skill whose exact parameters you don't already hold, call POST /skill/<name>?mode=dryRun and iterate until the response says valid:true — never guess parameters from a skill name alone. Then execute the same call without ?mode=dryRun.
Batch execution: when touching 2+ objects, prefer POST /skills/batch ({"steps":[{"skill","args"}],"continueOnError":false}, up to 50 steps per call, also supports ?mode=dryRun) over repeated single-item calls.
Error codes:
| Code | Meaning |
|---|---|
MODE_RESTRICTED / MODE_FORBIDDEN |
Needs a user grant, or needs Bypass/Allowlist. |
SURFACE_EXCLUDED |
Hidden by the current surfaceProfile — a configuration boundary, not a failure; don't retry or route around it. |
MISSING_PARAM / TARGET_NOT_FOUND |
Bad or unresolvable arguments — dryRun for the schema, locate the target first. |
For the full protocol detail, error code catalog, and guide-mode manual-* docs, optionally install the unity-core plugin — it's not required, this summary covers what you need for this skill.
Modules in this skill
| Module | Mode | Description | Doc |
|---|---|---|---|
| yaml-editing | — | Safe hand-edit rules for serialized YAML when REST cannot reach — reference/fileID repair, .meta/GUID safety, ProjectSettings patch, merge conflict (advisory, no REST skills) | modules/yaml-editing/SKILL.md |
| unity-cli | — | Experimental Unity CLI on the bound project (opt-in) — cold start with Editor closed, headless test/run/build, exit codes, JSON/NDJSON contract, hard DO-NOT list (advisory, no REST skills) | modules/unity-cli/SKILL.md |
| behavior | Mixed | Unity Behavior graph assets, agents, blackboard variables (com.unity.behavior, reflection-based) | modules/behavior/SKILL.md |
Mode legend: SA = runs without grant in all modes, FA = needs grant under Approval, Mixed = check per-skill, * = contains auto-forbidden skills.
Routing
yaml-editing is a last resort — only hand-edit serialized YAML when the REST skills in every other unity-* skill genuinely can't reach the target (e.g. the Editor is closed, or the asset type has no REST coverage). Getting fileIDs/GUIDs wrong corrupts scenes/prefabs silently; read the module doc's safety rules before touching any .unity/.prefab/.asset/.meta file directly.
unity-cli requires the user to have opted in (Library/UnitySkills/cli_config.json) and runs with the Editor closed — read this plugin's own modules/unity-cli/SKILL.md for the cold-start contract before using it.
behavior skills are named behavior_<verb> and follow the normal REST protocol — dryRun first.