Lab: Extension pull should namespace files by extension to prevent filename collisions

Problem

When two extensions from the same collective ship a file with the same name (e.g. @swamp/aws/ecs and @swamp/aws/eks both shipping cluster.ts), the second swamp extension pull throws a ConflictError — or silently overwrites with --force. This makes it impossible to have both extensions installed simultaneously if their filenames collide.

The model type strings are correctly namespaced (e.g. @swamp/aws/ecs/cluster vs @swamp/aws/eks/cluster), but the filesystem layout has no enforced namespacing. Extension authors must manually choose unique filenames, which is not enforced or documented.

Proposed Solution

Namespace pulled extension files by extension name at the filesystem level, e.g.:

.swamp/pulled-extensions/models/@swamp/aws/ecs/cluster.ts
.swamp/pulled-extensions/models/@swamp/aws/eks/cluster.ts

This would eliminate file-level collisions entirely and make it safe to pull multiple extensions from the same collective that happen to define models in the same domain (e.g. both ECS and EKS defining a cluster concept).

Alternatives

Document that extension authors within the same collective must use unique filenames across all extensions in that collective (fragile, doesn't scale)
Use subdirectories within the archive (e.g. models/ecs/cluster.ts) — shifts the burden to authors with no enforcement

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User extensions silently dropped when base type not yet registered at scan time

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Extension pull should namespace files by extension to prevent filename collisions

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