feat(kyberforge): add instructions-author skill for .apm/instructions files

Scaffolds and revises apm instructions files, with a throwaway-package
verification recipe because `apm compile --validate` always exits 0 and
Claude Code drops `description`. Routed from forge and linked from
apm-workflow's compile reference. Bumps kyberforge to 2.1.0 and the catalog
to 0.5.2.

Fixes #148

Co-Authored-By: Claude Code <[email protected]>
Claude-Session: https://claude.ai/code/session_01KkT7RSDwDbmrM9T34b6sTi

plugins/kyberforge/.apm/skills/instructions-author/references/create.md

@@ -0,0 +1,39 @@
+---
+source_keys:
+  - apm-docs-site
+  - apm-cli-0-28-0-experiments
+---
+
+# Creating a new instructions file
+
+Return to `SKILL.md` Step 3 once Step 3 below is done.
+
+## Before touching the filesystem
+
+Confirm, and ask the user for anything missing:
+
+- [ ] The one topic the file covers. Two topics are two files.
+- [ ] Which files it governs, as a glob, or that it must load in every session.
+- [ ] A kebab-case stem. It becomes the deployed filename.
+
+## Step 1 — Check the stem
+
+Install overwrites a hand-authored file at `.claude/rules/<stem>.md`, `.cursor/rules/<stem>.mdc`, `.windsurf/rules/<stem>.md`, `.kiro/steering/<stem>.md` and `.agents/rules/<stem>.md` without a prompt. List those paths in the consuming project and choose another stem on any hit.
+
+## Step 2 — Scaffold
+
+```bash
+bash scripts/new-instructions.sh <name> <path-inside-the-package>
+```
+
+The script walks up for a `type:`-bearing `apm.yml`. With none it exits 1 and names `/apm-workflow configure`; run that first, then retry. It never overwrites an existing file.
+
+## Step 3 — Fill in
+
+Replace every `FILL IN:` and delete the template's comments.
+
+- `applyTo`: quoted. Omit it only for a rule that must load in every session, and say so to the user; it costs context at every launch.
+- `description`: one line. Write the body as if it were absent, because Claude Code never sees it.
+- Body: bullets, one topic, paths in backticks, nothing that assumes another file is loaded.
+
+For glob syntax or a field question, read `references/schema.md`.