Feat/iii directory support global skills

.github/workflows/skill-check.yml

@@ -6,7 +6,7 @@ on:
     branches: [main]
 
 permissions:
-  contents: write          # for auto-fix mode (commits the rendered diff back)
+  contents: read           # report-only; the action no longer commits back
   pull-requests: write     # for the sticky PR comment
   actions: write           # for the persistent AI skip-cache (v0.3+)
 
@@ -19,6 +19,6 @@ jobs:
           ref: ${{ github.head_ref }}    # check out the PR branch directly
       - uses: iii-hq/skills-and-validation@v0.4
         with:
-          write: true
+          write: false
           scope: pr-diff
           anthropic-api-key: ${{ secrets.ANTHROPIC_API_KEY }}

iii-directory/examples/test_registry.rs

@@ -0,0 +1,70 @@
+use iii_directory::fs_source::{scan_prompts, scan_skills};
+use iii_directory::sources::registry::{download, VersionSpec};
+
+#[tokio::main]
+async fn main() -> Result<(), String> {
+    let registry =
+        std::env::var("REGISTRY").unwrap_or_else(|_| "http://localhost:3111".to_string());
+    let worker = std::env::var("WORKER").unwrap_or_else(|_| "hello-worker".to_string());
+    let tag = std::env::var("TAG").unwrap_or_else(|_| "latest".to_string());
+
+    let tmp = tempfile::tempdir().unwrap();
+    let skills_folder = tmp.path();
+
+    println!("→ Downloading {worker} (tag={tag}) from {registry}");
+    println!("  skills_folder = {}", skills_folder.display());
+
+    let spec = VersionSpec::Tag(tag);
+    let result = download(&registry, &worker, &spec, skills_folder, 30_000).await?;
+
+    println!("\n[download result]");
+    println!("  namespace        = {}", result.namespace);
+    println!("  skills_written   = {:?}", result.skills_written);
+    println!("  prompts_written  = {:?}", result.prompts_written);
+
+    let (skills, skill_skipped) = scan_skills(skills_folder);
+    let (prompts, prompt_skipped) = scan_prompts(skills_folder);
+
+    println!("\n[scan_skills]");
+    for s in &skills {
+        println!("  id={:<40} path={}", s.id, s.abs_path.display());
+    }
+    if !skill_skipped.is_empty() {
+        println!("\n[skill skips]");
+        for s in &skill_skipped {
+            println!("  {} → {}", s.path.display(), s.reason);
+        }
+    }
+
+    println!("\n[scan_prompts]");
+    for p in &prompts {
+        println!("  name={:<30} path={}", p.name, p.abs_path.display());
+    }
+    if !prompt_skipped.is_empty() {
+        println!("\n[prompt skips]");
+        for s in &prompt_skipped {
+            println!("  {} → {}", s.path.display(), s.reason);
+        }
+    }
+
+    println!(
+        "\nDONE — skills scanned={}, prompts scanned={}",
+        skills.len(),
+        prompts.len()
+    );
+
+    // Soft assertions so the example doubles as a smoke test.
+    let any_index = skills.iter().any(|s| s.id.ends_with("/index"));
+    if !any_index {
+        eprintln!("FAIL: no skill with id ending in /index was scanned");
+        std::process::exit(1);
+    }
+    for s in &skills {
+        if s.id.chars().any(|c| c.is_ascii_uppercase()) {
+            eprintln!("FAIL: skill id leaked uppercase: {}", s.id);
+            std::process::exit(1);
+        }
+    }
+    println!("smoke: at least one /index id present, no uppercase leaks");
+    Ok(())
+}

iii-directory/skill.md

@@ -0,0 +1,11 @@
+# iii-directory
+
+Engine introspection, workers registry proxy, and filesystem-backed skill + prompt reader for the iii engine. Every public function sits under a single `directory::*` namespace, split into four MCP-agnostic surfaces (`skills`, `prompts`, `engine`, and `registry`), so callers learn one envelope across local files, the running engine, and the public workers registry.
+
+Skills and prompts are sourced from a single configured folder on disk (`skills_folder`). The only write path is `directory::skills::download`, which pulls markdown into `skills_folder` from either the workers registry or a GitHub repo. `directory::skills::list` returns one row per markdown file with `title` (preferring the YAML frontmatter `title:` over the body H1) and `type` lifted from frontmatter. `directory::skills::get` accepts a bare id, a `<id>.md` file-path form, or the legacy `iii://<id>` URI. `SKILLS.md` is aliased to `index.md` at scan time so the new convention round-trips through both filesystem and parser. `directory::skills::index` renders a short per-worker overview that emits both relative file-path pointers (`Read [<ns>/index.md](<ns>/index.md)`) and the legacy `iii://<ns>/index` form side by side for back-compat.
+
+`directory::skills::download` pulls bundles from the public workers registry (`api.workers.iii.dev` by default). For self-hosted setups, repoint `registry_url` in `config.yaml` at your own registry. The `directory::registry::*` proxies share their envelope with `directory::engine::workers::*`, so a single parser handles both local and remote worker discovery.
+
+```bash
+iii worker add iii-directory
+```

iii-directory/src/fs_source.rs

@@ -7,6 +7,7 @@
 //! <skills_folder>/
 //!   <ns>/                       # one folder per download namespace
 //!     index.md                  # → iii://<ns>/index
+//!     SKILLS.md                 # → iii://<ns>/index   (alias of index.md)
 //!     anything.md               # → iii://<ns>/anything
 //!     deep/path.md              # → iii://<ns>/deep/path
 //!     prompts/                  # ← magic marker for prompts
@@ -164,11 +165,36 @@ fn walk_markdown(base_dir: &Path) -> Result<Vec<(PathBuf, PathBuf)>, String> {
     Ok(out)
 }
 
+/// Convert a `<skills_folder>`-relative path to a skill id.
+///
+/// `SKILLS.md` (the literal filename, any case-sensitive match) is
+/// treated as an alias for `index.md`, so a file at `<ns>/SKILLS.md`
+/// produces the id `<ns>/index`. The alias runs on the final path
+/// component only — directories named `SKILLS` are *not* renamed.
 fn rel_to_id(rel: &Path) -> Result<String, String> {
     let rel_str = rel
         .to_str()
         .ok_or_else(|| format!("non-UTF-8 path: {}", rel.display()))?;
-    let stripped = rel_str.strip_suffix(".md").unwrap_or(rel_str);
+    let aliased = if let Some(parent) = rel.parent() {
+        let last_is_skills_md = rel
+            .file_name()
+            .and_then(|s| s.to_str())
+            .map(|n| n == "SKILLS.md")
+            .unwrap_or(false);
+        if last_is_skills_md {
+            let parent_str = parent.to_str().unwrap_or("");
+            if parent_str.is_empty() {
+                "index.md".to_string()
+            } else {
+                format!("{}/index.md", parent_str.replace('\\', "/"))
+            }
+        } else {
+            rel_str.to_string()
+        }
+    } else {
+        rel_str.to_string()
+    };
+    let stripped = aliased.strip_suffix(".md").unwrap_or(&aliased).to_string();
     Ok(stripped.replace('\\', "/"))
 }
 
@@ -520,6 +546,55 @@ mod tests {
         assert!(skipped.is_empty());
     }
 
+    #[test]
+    fn scan_skills_treats_skills_md_as_index_alias() {
+        let tmp = tempfile::tempdir().unwrap();
+        let ns = tmp.path().join("resend");
+        std::fs::create_dir_all(&ns).unwrap();
+        std::fs::write(ns.join("SKILLS.md"), "# resend\n").unwrap();
+
+        let (skills, skipped) = scan_skills(tmp.path());
+        assert!(skipped.is_empty(), "unexpected skips: {skipped:?}");
+        assert_eq!(skills.len(), 1);
+        assert_eq!(skills[0].id, "resend/index");
+    }
+
+    #[test]
+    fn scan_skills_treats_nested_skills_md_as_index_alias() {
+        let tmp = tempfile::tempdir().unwrap();
+        let nested = tmp.path().join("resend/emails");
+        std::fs::create_dir_all(&nested).unwrap();
+        std::fs::write(nested.join("SKILLS.md"), "# emails\n").unwrap();
+
+        let (skills, skipped) = scan_skills(tmp.path());
+        assert!(skipped.is_empty(), "unexpected skips: {skipped:?}");
+        assert_eq!(skills.len(), 1);
+        assert_eq!(skills[0].id, "resend/emails/index");
+    }
+
+    #[test]
+    fn scan_skills_skips_one_when_both_index_and_skills_present() {
+        let tmp = tempfile::tempdir().unwrap();
+        let ns = tmp.path().join("resend");
+        std::fs::create_dir_all(&ns).unwrap();
+        std::fs::write(ns.join("index.md"), "# from index\n").unwrap();
+        std::fs::write(ns.join("SKILLS.md"), "# from SKILLS\n").unwrap();
+
+        let (skills, skipped) = scan_skills(tmp.path());
+        assert_eq!(skills.len(), 1, "should keep exactly one entry");
+        assert_eq!(skills[0].id, "resend/index");
+        assert_eq!(
+            skipped.len(),
+            1,
+            "second entry should be reported as duplicate"
+        );
+        assert!(
+            skipped[0].reason.contains("duplicate id \"resend/index\""),
+            "expected duplicate-id skip, got: {}",
+            skipped[0].reason
+        );
+    }
+
     // ── scan_prompts ─────────────────────────────────────────────────
 
     #[test]

iii-directory/src/functions/registry.rs

@@ -462,11 +462,7 @@ pub async fn worker_info(
     input: WorkerInfoInput,
 ) -> Result<WorkerInfoOutput, String> {
     let (name, spec) = classify_worker_info_input(input)?;
-    let cache_key = format!(
-        "worker-info:{name}:{}={}",
-        spec.label(),
-        spec.query_value()
-    );
+    let cache_key = format!("worker-info:{name}:{}={}", spec.label(), spec.query_value());
     if let Some(cached) = cache.get::<WorkerInfoOutput>(&cache_key).await {
         return Ok(cached);
     }
@@ -618,7 +614,9 @@ fn parse_skills_tree(value: &Value) -> SkillsTree {
                 .filter_map(|s| {
                     s.get("path")
                         .and_then(|p| p.as_str())
-                        .map(|p| SkillsTreeSkill { path: p.to_string() })
+                        .map(|p| SkillsTreeSkill {
+                            path: p.to_string(),
+                        })
                 })
                 .collect()
         })
@@ -748,7 +746,10 @@ mod tests {
         assert_eq!(out.workers[0].kind.as_deref(), Some("binary"));
         assert_eq!(out.workers[0].version.as_deref(), Some("1.2.3"));
         assert_eq!(out.workers[0].total_downloads, 42);
-        assert_eq!(out.workers[0].supported_targets, vec!["x86_64-unknown-linux-gnu".to_string()]);
+        assert_eq!(
+            out.workers[0].supported_targets,
+            vec!["x86_64-unknown-linux-gnu".to_string()]
+        );
         let author = out.workers[0].author.as_ref().unwrap();
         assert_eq!(author.name.as_deref(), Some("iii"));
         assert!(author.verified);