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sow-tools/AGENTS.md
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---
description: sow-tools / Crucible — the build/conversion/sync toolchain repo.
alwaysApply: true
---
# sow-tools / Crucible Agent Guide
This repo owns the **builder logic** for the migration: one Go module
(`gitea.westgate.pw/ShadowsOverWestgate/sow-tools`) producing the `crucible`
dispatcher and the `crucible-<name>` binaries (D11). Read
[`../AGENTS.md`](../AGENTS.md) (migration hub) and
[`../../KICKOFF_PROMPT.md`](../../KICKOFF_PROMPT.md) first.
## What this repo owns / does not own
Owns: build/extract/validate/compare pipeline, ERF/HAK packing, topdata 2da/tlk
compilation, wiki rendering/deploy, depot blob verify, music conversion,
changelog. Does **not** own authored game content (that is `sow-module` /
`sow-topdata` / `sow-assets-manifest`) or any production deploy authority (that
is `sow-platform`).
## Scaffold rules (Phase 5)
1. **Source is not transplanted.** The migration hard rules forbid copying the
`internal/` packages from `gitea/sow-tools` automatically. The operator
migrates them at cutover; see [`docs/migration-from-nwn-tool.md`](docs/migration-from-nwn-tool.md).
2. **Fail closed, never fake.** Unwired builders exit `70`. Do not stub a
builder to emit a placeholder artifact.
3. **Binaries are not committed.** They are CI artifacts / image layers (D19).
`/bin/`, `*.exe`, `nwn-tool`, `sow-toolkit` are gitignored.
4. **No home-dir / `NWN_ROOT` guessing.** Builders take roots explicitly via
flag or env. See [`docs/consumer-contract.md`](docs/consumer-contract.md).
5. **The registry is the command surface.** `internal/dispatch.Registry` is the
single source of truth; keep it in sync with `cmd/` and
[`docs/command-surface.md`](docs/command-surface.md). Adding a builder = a
`cmd/crucible-<name>/main.go` shim + a `Registry` entry + a doc row.
## Wiring a builder (operator cutover)
1. Migrate the relevant `internal/` package(s) from `gitea/sow-tools`.
2. Register a handler and flip the builder off the unwired path in
`internal/dispatch`.
3. Add tests; keep outputs deterministic (same input → same bytes).
4. `make check` must stay green; `make smoke` is updated to expect a wired exit.
## Commands
```bash
nix develop && make check # vet + test + shellcheck + yamllint
make build # cmd/* -> ./bin
make smoke # assert fail-closed contract
make image # crucible:<sha>
```
## Git
Never commit, branch, or push. Suggest a commit message; let the operator do it.