feat(kyberforge): add skill-author, merging skill-write and skill-improve

Closes #5. Single authoring skill replaces the factory trio — one set of
standards, one script, one place for future governance rules. Routes to
create or improve flow based on context. Passes skill-audit with no findings.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016z2ZFYHQCex8yZAMVMTZzZ

plugins/kyberforge/skills/skill-author/tests/README.md

@@ -0,0 +1,28 @@
+# tests/
+
+Test files for scripts bundled with this skill.
+
+## Dependencies
+
+Tests require [bats-support](https://github.com/bats-core/bats-support) and
+[bats-assert](https://github.com/bats-core/bats-assert). The test files load
+helpers from the repo root's `tests/test_helper/`.
+
+From the repo root:
+
+```bash
+git clone https://github.com/bats-core/bats-support tests/test_helper/bats-support
+git clone https://github.com/bats-core/bats-assert tests/test_helper/bats-assert
+```
+
+Run all tests for this skill (from the repo root):
+
+```bash
+bats plugins/kyberforge/skills/skill-author/tests/
+```
+
+## Files
+
+| File | Purpose |
+|------|---------|
+| `new-skill.bats` | Bats test suite for `scripts/new-skill.sh` |

plugins/kyberforge/skills/skill-author/tests/new-skill.bats

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+#!/usr/bin/env bats
+
+setup() {
+    REPO_ROOT="$(cd "$BATS_TEST_DIRNAME/../../../../../" && pwd)"
+    load "$REPO_ROOT/tests/test_helper/bats-support/load"
+    load "$REPO_ROOT/tests/test_helper/bats-assert/load"
+
+    SCRIPT="$(cd "$BATS_TEST_DIRNAME/../scripts" && pwd)/new-skill.sh"
+    DEST="$(mktemp -d)"
+}
+
+teardown() {
+    rm -rf "$DEST"
+}
+
+# ---------------------------------------------------------------------------
+# Passing cases
+# ---------------------------------------------------------------------------
+
+@test "--help exits 0" {
+    run bash "$SCRIPT" --help
+    assert_success
+    assert_output --partial "Usage:"
+}
+
+@test "creates scaffold directory at destination" {
+    run bash "$SCRIPT" my-tool "$DEST"
+    assert_success
+    assert [ -d "$DEST/my-tool" ]
+}
+
+@test "scaffold contains SKILL.md" {
+    bash "$SCRIPT" my-tool "$DEST"
+    assert [ -f "$DEST/my-tool/SKILL.md" ]
+}
+
+@test "scaffold contains README.md" {
+    bash "$SCRIPT" my-tool "$DEST"
+    assert [ -f "$DEST/my-tool/README.md" ]
+}
+
+@test "scaffold contains scripts/, references/, assets/, tests/ directories" {
+    bash "$SCRIPT" my-tool "$DEST"
+    assert [ -d "$DEST/my-tool/scripts" ]
+    assert [ -d "$DEST/my-tool/references" ]
+    assert [ -d "$DEST/my-tool/assets" ]
+    assert [ -d "$DEST/my-tool/tests" ]
+}
+
+@test "substitutes skill name in SKILL.md" {
+    bash "$SCRIPT" my-tool "$DEST"
+    run grep "my-tool" "$DEST/my-tool/SKILL.md"
+    assert_success
+}
+
+@test "substitutes skill name in README.md" {
+    bash "$SCRIPT" my-tool "$DEST"
+    run grep "my-tool" "$DEST/my-tool/README.md"
+    assert_success
+}
+
+@test "substitutes skill name in tests/README.md" {
+    bash "$SCRIPT" my-tool "$DEST"
+    run grep "my-tool" "$DEST/my-tool/tests/README.md"
+    assert_success
+}
+
+@test "skill name with numbers is valid" {
+    run bash "$SCRIPT" my-tool-2 "$DEST"
+    assert_success
+    assert [ -d "$DEST/my-tool-2" ]
+}
+
+@test "next-steps output references /skill-audit not validate.sh" {
+    run bash "$SCRIPT" my-tool "$DEST"
+    assert_output --partial "/skill-audit"
+    refute_output --partial "validate.sh"
+}
+
+# ---------------------------------------------------------------------------
+# Failing cases
+# ---------------------------------------------------------------------------
+
+@test "fails when no arguments given" {
+    run bash "$SCRIPT"
+    assert_failure
+}
+
+@test "fails when skill name contains uppercase" {
+    run bash "$SCRIPT" MyTool "$DEST"
+    assert_failure
+}
+
+@test "fails when skill name has consecutive hyphens" {
+    run bash "$SCRIPT" my--tool "$DEST"
+    assert_failure
+}
+
+@test "fails when skill name has a leading hyphen" {
+    run bash "$SCRIPT" -my-tool "$DEST"
+    assert_failure
+}
+
+@test "fails when skill name has a trailing hyphen" {
+    run bash "$SCRIPT" my-tool- "$DEST"
+    assert_failure
+}
+
+@test "fails when destination directory does not exist" {
+    run bash "$SCRIPT" my-tool "/nonexistent/path"
+    assert_failure
+}
+
+@test "fails when target already exists" {
+    mkdir -p "$DEST/my-tool"
+    run bash "$SCRIPT" my-tool "$DEST"
+    assert_failure
+}