MGS1005: redundant footprint glob

magus doctor found a per-target ctx.writesFiles(...) glob already declared in the project's outputs option. The per-target copy adds nothing.

[MGS1005] 1 per-target magus.outputs glob(s) duplicate a project-wide
declaration; drop the duplicate (see
.../MGS1005.md)
  build: ctx.writesFiles("dist/**") already in project outputs

Why

Outputs are always additive: the project owns its declared outputs, and a target declaring the same glob does not make that output more precise. This is usually copy-paste from a project-wide declaration.

This is a warning, not a load error: a duplicate is a no-op, not a fault.

Resolution

Keep the output declaration in exactly one place, chosen by scope:

• if the glob is relevant to every target, keep the project-wide sources/outputs and drop the per-target copy;
• if it is relevant to one target, drop the project-wide declaration and keep ctx.writesFiles(...) in that target's body.

import "magus";

// Before: "dist/**" declared twice - the per-target copy is a no-op.
magus\project({outputs = ["dist/**"]});
export fun build(ctx: magus\Context, args: [str]) > void {
    ctx.writesFiles("dist/**");
    go["go-build"]();
}

// After: one home. Here it affects every target, so keep it project-wide.
magus\project({outputs = ["dist/**"]});
export fun build(ctx: magus\Context, args: [str]) > void { go["go-build"](); }

What this is not

• Not a hard error. The duplicate is a no-op; nothing blocks the build.
• Not about inputs. An explicit ctx.readsFiles(...) list narrows the target's cache footprint, so repeating a project source there is valid.
• Not subsumption-aware. This check matches globs exactly. A per-target glob that is subsumed by a broader project-wide pattern (src/config.go under **/*.go) is also redundant but is not flagged here.

See also

• cache: the three footprint layers and the union model.
• cache: choosing project-wide vs per-target declarations.