Assisted-by: Claude Opus 5 via pi

diff --git a/ai/pi/extensions/claude-project-skills.ts b/ai/pi/extensions/claude-project-skills.ts
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+++ b/ai/pi/extensions/claude-project-skills.ts
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+/**
+ * Claude Project Skills Bridge
+ *
+ * Loads project-local Claude Code skills (`.claude/skills/`) into pi.
+ *
+ * pi auto-discovers `.pi/skills` and `.agents/skills` from cwd up to the repo
+ * root, but not `.claude/skills`. A relative `"skills"` entry in the global
+ * settings.json cannot cover the gap either: global entries resolve against
+ * `~/.pi/agent`, not the cwd, so `".claude/skills"` there points at a
+ * directory that does not exist. This extension contributes the paths at
+ * `resources_discover` time instead, so the skills register normally and get
+ * their own `/skill:name` commands.
+ *
+ * Companion to claude-plugins.ts, which covers the plugin cache
+ * (~/.claude/plugins/cache). User-level ~/.claude/skills is skipped here
+ * because settings.json already loads ~/.dotfiles/ai/skills.
+ */
+
+import * as fs from "node:fs";
+import * as path from "node:path";
+import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
+
+/**
+ * Directories from `startDir` up to the repo root, inclusive. Mirrors pi's own
+ * ancestor walk for `.agents/skills`, and treats a jj repo without a colocated
+ * git dir as a root too.
+ */
+function ancestorsToRepoRoot(startDir: string): string[] {
+  const dirs: string[] = [];
+  let dir = path.resolve(startDir);
+
+  while (true) {
+    dirs.push(dir);
+    if (isRepoRoot(dir)) break;
+
+    const parent = path.dirname(dir);
+    if (parent === dir) break;
+    dir = parent;
+  }
+
+  return dirs;
+}
+
+function isRepoRoot(dir: string): boolean {
+  return fs.existsSync(path.join(dir, ".git")) || fs.existsSync(path.join(dir, ".jj"));
+}
+
+function isDir(p: string): boolean {
+  try {
+    return fs.statSync(p).isDirectory();
+  } catch {
+    return false;
+  }
+}
+
+function findSkillDirs(cwd: string): string[] {
+  return ancestorsToRepoRoot(cwd)
+    .map((dir) => path.join(dir, ".claude", "skills"))
+    .filter(isDir);
+}
+
+export default function claudeProjectSkills(pi: ExtensionAPI) {
+  pi.on("resources_discover", async (event, ctx) => {
+    // `.claude/skills` is project-local content, so honor the same trust gate
+    // pi applies to `.pi/` and `.agents/skills`.
+    if (!ctx.isProjectTrusted()) return;
+
+    const skillPaths = findSkillDirs(event.cwd);
+    if (skillPaths.length === 0) return;
+
+    return { skillPaths };
+  });
+}