chore(vendor): import pi 0.85.1

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: d981de1229ef899957bbe968bc8dcda02a21f477

third_party/pi/packages/coding-agent/test/fixtures/skills/long-name/SKILL.md

@@ -0,0 +1,8 @@
+---
+name: this-is-a-very-long-skill-name-that-exceeds-the-sixty-four-character-limit-set-by-the-standard
+description: A skill with a name that exceeds 64 characters.
+---
+
+# Long Name
+
+This skill's name is too long.