refactor(just)!: convert just to a flat module

.github/workflows/just-lint.yml

@@ -15,4 +15,4 @@ jobs:
       - name: Install just
         uses: extractions/setup-just@v4
       - name: Lint justfiles
-        run: just --justfile just.just --working-directory . fmt-check
+        run: just --justfile just/just.just --working-directory . just-fmt-check

README.md

@@ -92,11 +92,10 @@ Modules are moving into their own directories, each documenting itself:
 | `docusaurus` | Docusaurus site build, serve, deploy, formatting  | [docusaurus/README.md](docusaurus/README.md) |
 | `go`         | Go build, test, coverage gate, format, lint       | [go/README.md](go/README.md)                 |
 | `md`         | Repository markdown formatting (mdformat via uvx) | [md/README.md](md/README.md)                 |
+| `just`       | Justfile formatting                               | [just/README.md](just/README.md)             |
 | `react`      | React app build, lint, format, SDK codegen (Bun)  | [react/README.md](react/README.md)           |
 
-Modules not yet moved are documented inline below.
-
-### just.just
+## just.just
 
 | Recipe      | Description                             |
 | ----------- | --------------------------------------- |

just/README.md

@@ -0,0 +1,39 @@
+# just.just
+
+Formats and checks the justfiles in a repository, using just's own formatter.
+
+## 📦 Usage
+
+`just.just` is consumed with `import?`. Its recipes are flat and prefixed, so it
+needs no `.mod.just` shim.
+
+```just
+import? '.just/remote/just.just'
+
+# Fetch shared justfiles from osapi-justfiles
+fetch:
+    mkdir -p .just/remote
+    curl -sSfL https://raw.githubusercontent.com/osapi-io/osapi-justfiles/refs/heads/main/just/just.just -o .just/remote/just.just
+```
+
+Then:
+
+```bash
+just fetch            # Download the shared recipe file
+just just-fmt         # Reformat every justfile in the repository
+just just-fmt-check   # Check formatting, non-zero exit on drift
+```
+
+## 🔍 What it covers
+
+Every `justfile` and `*.just` in the repository, except:
+
+| Skipped        | Why                                                            |
+| -------------- | -------------------------------------------------------------- |
+| `**/.just/*`   | fetched modules, at any depth — they belong to this repository |
+| `.worktrees/*` | checkouts of other branches                                    |
+| `.claude/*`    | generated and regenerated by tooling                           |
+
+## 📄 License
+
+The [MIT](../LICENSE) License.

just.just → just/just.just

@@ -18,7 +18,7 @@
 
 # Reformat justfiles with canonical style
 [group('fmt')]
-fmt:
+just-fmt:
     #!/usr/bin/env bash
     set -euo pipefail
     find . -type f \( -name '*.just' -o -name 'justfile' \) ! -path './.worktrees/*' ! -path './.claude/*' ! -path '*/.just/*' | while read -r f; do
@@ -27,7 +27,7 @@ fmt:
 
 # Check justfile formatting
 [group('fmt')]
-fmt-check:
+just-fmt-check:
     #!/usr/bin/env bash
     set -euo pipefail
     failed=0

justfile

@@ -2,8 +2,8 @@
 
 # Check justfile formatting
 test:
-    just --justfile just.just --working-directory . fmt-check
+    just --justfile just/just.just --working-directory . just-fmt-check
 
 # Format and lint before committing
 ready:
-    just --justfile just.just --working-directory . fmt
+    just --justfile just/just.just --working-directory . just-fmt