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addons/godot_ai/export/mcp_export_plugin.gd

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+@tool
+extends EditorExportPlugin
+
+## Strips the MCP game-helper autoload from exported builds (#740).
+##
+## plugin.gd writes `autoload/_mcp_game_helper` into project.godot so the
+## editor-spawned game process loads the helper. Exports bake project
+## settings into the pack's project.binary, so without this plugin every
+## export ships the autoload — and users who exclude addons/godot_ai/**
+## in their export preset get three "Failed to instantiate an autoload"
+## errors at game start. Even when the files ARE shipped, the helper is
+## editor-tooling: no exported build should carry it.
+##
+## Strip mechanics: clear the in-memory ProjectSettings entry in
+## _export_begin, restore it in _export_end. The export pipeline reads
+## the live ProjectSettings when it bakes project.binary, which happens
+## after _export_begin — verified end-to-end by
+## script/ci-export-strip-smoke, which exports a real pack and asserts
+## the autoload is absent inside it. We never call ProjectSettings.save()
+## while stripped, so project.godot on disk keeps the autoload
+## throughout; only the export snapshot loses it.
+##
+## Failure containment: if an export aborts so hard that _export_end
+## never fires, the damage is bounded to the editor's in-memory settings
+## — the running game reads project.godot from disk, and plugin.gd's
+## _ensure_game_helper_autoload() re-asserts the entry on the next
+## plugin enable / editor launch.
+
+## Must equal "autoload/" + plugin.gd's GAME_HELPER_AUTOLOAD_NAME.
+## Duplicated (not preloaded from plugin.gd) to avoid a cyclic preload —
+## plugin.gd preloads this script. The pairing is locked by
+## test_export_strip.gd's constants-contract test.
+const AUTOLOAD_KEY := "autoload/_mcp_game_helper"
+
+var _saved_value: Variant = null
+var _stripped := false
+
+
+func _get_name() -> String:
+	return "GodotAIStripAutoload"
+
+
+func _export_begin(_features: PackedStringArray, _is_debug: bool, _path: String, _flags: int) -> void:
+	## `_stripped` guard: if a previous export died before _export_end,
+	## don't overwrite the genuinely-saved value with the already-cleared
+	## state — restore semantics stay anchored to the original value.
+	if _stripped:
+		return
+	if not ProjectSettings.has_setting(AUTOLOAD_KEY):
+		return
+	_saved_value = ProjectSettings.get_setting(AUTOLOAD_KEY)
+	## Setting a project setting to null erases it.
+	ProjectSettings.set_setting(AUTOLOAD_KEY, null)
+	_stripped = true
+	print("MCP | export: stripping %s from the exported pack (restored in the editor after export)" % AUTOLOAD_KEY)
+
+
+func _export_end() -> void:
+	if not _stripped:
+		return
+	ProjectSettings.set_setting(AUTOLOAD_KEY, _saved_value)
+	## Mirror _ensure_game_helper_autoload()'s registration shape so the
+	## restored entry is indistinguishable from the original: initial
+	## value "" keeps project.godot diff-clean, basic keeps it visible in
+	## the non-advanced settings view.
+	ProjectSettings.set_initial_value(AUTOLOAD_KEY, "")
+	ProjectSettings.set_as_basic(AUTOLOAD_KEY, true)
+	_saved_value = null
+	_stripped = false

addons/godot_ai/export/mcp_export_plugin.gd.uid

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+uid://np0cp6fwpim7