feat(pkg): package manager — fetch + MVS resolve + namespace registration (#63)
Implements the v1 direction decided in the RFC as a set of `x` subcommands
plus a small, contained compiler change.
* URL-as-identity, no registry — a dependency is named by its git import
path and a `git tag vX.Y.Z` publishes a version.
* Minimum Version Selection — a `require` is a minimum; the resolver picks
the greatest required minimum per module, then the reachable closure at
those versions. Deterministic, no SAT solver (tools/x/pkg.ludic).
* Content-addressed global store + per-project links — packages live once in
~/.ludic/store keyed by a content hash; each project links them under
ludic_modules/. package.ludic (manifest) + package.lock.ludic (lock).
* Namespace registration for source packages via a module-root import
fallback in the compiler: do_import resolves a non-local, non-absolute
import under $LUDIC_MODULES (default ludic_modules/), so a fetched
package's Ludic compiles into the consumer the way the built-in stdlib
does. Collisions and missing prebuilt targets are hard errors.
Commands: x add / x get / x update / x verify / x vendor. New hermetic suite
`x test-pkg` (stands up throwaway git repos, offline) is gated inside `x test`.
Existing programs compile byte-for-byte identically (the import fallback only
fires when the local path is absent); the C-free bootstrap fixpoint holds and
the seed is regenerated. Full suite: 87 passed, package suite: 12 passed.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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@ -66,6 +66,16 @@ bin/x selfhost-test # correctness + the self-hosting / C-free bootstrap fixpoi
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bin/x help # every command
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```
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Add a dependency (URL-as-identity, MVS resolution, content-addressed store):
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```bash
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bin/x add git.workshopsoft.io/user/pkg # resolve + fetch + link into ludic_modules/
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bin/x get # install everything in package.ludic, write the lock
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bin/x verify # check the locked packages against the store
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```
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See [`docs/PACKAGES.md`](docs/PACKAGES.md) for the manifest, lockfile and package model.
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## Layout
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| Path | What it is |
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