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# sow-tools — Crucible
Crucible is the Shadows Over Westgate build/conversion/sync toolchain: one Go
module producing several small binaries plus a `crucible` dispatcher (D11). It is
the **only** repo that owns builder logic; the artifact repos (`sow-module`,
`sow-topdata`, `sow-assets-manifest`) invoke Crucible through wrapper scripts and
never embed a toolkit.
```text
Repos produce artifacts. sow-platform deploys artifacts.
Crucible is how the artifact repos turn source into artifacts.
```
## Binaries
| Binary | Dispatcher form | Owns |
| ------------------ | ------------------ | ----------------------------------------------- |
| `crucible` | — | dispatcher: `crucible <builder> [args]` |
| `crucible-depot` | `crucible depot` | content-addressed depot blob verify/move |
| `crucible-hak` | `crucible hak` | ERF/HAK pack/unpack + hak manifests |
| `crucible-module` | `crucible module` | build/extract/validate/compare the `.mod` |
| `crucible-topdata` | `crucible topdata` | compile 2da/tlk topdata + packages |
| `crucible-wiki` | `crucible wiki` | render + deploy mechanical wiki pages |
The dispatcher and the standalone shims share one registry
(`internal/dispatch`); the shims exist so consumer wrapper scripts can resolve a
single-token command. The full legacy `nwn-tool` command surface and where each
command lands is mapped in [`docs/command-surface.md`](docs/command-surface.md).
## Status (cutover performed)
The internal `app`/`pipeline`/`project`/`erf`/`gff`/`topdata`/`music`/`changelog`/
`validator` packages from `gitea/sow-tools` have been migrated into this tree, and
the `module`, `topdata`, `hak`, and `wiki` builders now **delegate to the migrated
`nwn-tool` command surface** (mapped in
[`docs/command-surface.md`](docs/command-surface.md)). `config` and `changelog`
are global commands on the dispatcher. `depot` has no migrated logic yet, so it
keeps the fail-closed path: exit `70`, never a faked artifact.
See [`docs/migration-from-nwn-tool.md`](docs/migration-from-nwn-tool.md) for what
was done and what remains (the consumer `--manifest/--source/--out` flag contract
is the open Phase-6 item).
## Develop
Self-contained (D8) — a host with only Nix can run everything:
```bash
nix develop # Go + ffmpeg + shellcheck + yamllint + make
make check # go vet + go test + shellcheck + yamllint
make build # build every cmd/* into ./bin (gitignored)
make smoke # build + assert the fail-closed contract
make image # docker build -> crucible:<sha>
```
Binaries are **never committed** — they are CI artifacts / image layers (D19).
This retires the old habit of checking in `nwn-tool` / `sow-toolkit`.
## CI
PR-first (D7): every check runs on pull requests and on push to `main`.
- `test.yml` — vet, test, shellcheck, yamllint, binary smoke.
- `build-image.yml` — build `registry.westgate.pw/sow/crucible:<sha>`; publish
only on `main`. PRs build but never push. No mutable tags.
- `release.yml` — tag-gated binary bundles; image re-tag is wired in Phase 6.
## Consumers
How the artifact repos resolve a Crucible binary (and the `NWN_ROOT` rule) is
documented in [`docs/consumer-contract.md`](docs/consumer-contract.md).