fix(kyberforge): resolve clean-context audit findings on primitive support

primitive-author:
- description excludes read-only review (-> factory-audit)
- validation Gotcha now matches the research: compile never reads
  prompts, install fails only on a bad Copilot hook payload and warns on
  prompt input names and dropped keys
- instruction fold-in into AGENTS.md/CLAUDE.md stated as conditional on
  dedup and --force-instructions
- hook checklist gains the wrapped-shape Must, drops hardlinks, notes
  why executable is stricter than the research, and states the
  separate Copilot-targeted package route instead of a blanket "don't"
- prompt Must 5 keeps the research's Copilot-only-key exception; adds
  model-slug and 250-char Shoulds; descriptions name skills or agents
- placeholder instruction covers both FILL IN and FILL_IN_ tokens

factory-audit: hardlink FAIL scoped to instructions and prompts
(find_hook_files skips symlinks only), with bats cases; prompt-flow
description rubric names skills or agents.

forge: version-bump, apm-routes and sources references updated for the
primitive route.

Refs #94

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KkT7RSDwDbmrM9T34b6sTi

plugins/kyberforge/.apm/skills/factory-audit/tests/validate-primitive.bats

@@ -165,6 +165,14 @@ teardown() {
     assert_output --partial "is a symlink"
 }
 
+@test "hook: a hardlinked hook file is not a FAIL (find_hook_files skips symlinks only)" {
+    write_hook real.json '{"hooks":{"Stop":[{"hooks":[{"type":"command","command":"true"}]}]}}'
+    ln "$PKG/.apm/hooks/real.json" "$PKG/.apm/hooks/linked.json"
+    run bash "$SCRIPT" "$PKG/.apm/hooks/linked.json"
+    assert_success
+    refute_output --partial "hardlink"
+}
+
 # ---------------------------------------------------------------------------
 # Instructions
 # ---------------------------------------------------------------------------
@@ -227,6 +235,15 @@ applyTo: "**/*.py"' 'body'
     assert_output --partial "also exists at the package root"
 }
 
+@test "instruction: a hardlinked instruction file is a FAIL" {
+    write_instruction python 'description: x
+applyTo: "**/*.py"' 'body'
+    ln "$PKG/.apm/instructions/python.instructions.md" "$TMPDIR/python.instructions.md"
+    run bash "$SCRIPT" "$PKG/.apm/instructions/python.instructions.md"
+    assert_failure
+    assert_output --partial "is a hardlink"
+}
+
 # ---------------------------------------------------------------------------
 # Prompts
 # ---------------------------------------------------------------------------
@@ -314,3 +331,11 @@ $(printf 'line\n%.0s' $(seq 1 80))
     assert_success
     refute_output --partial "SUGGESTION"
 }
+
+@test "prompt: a hardlinked prompt file is a FAIL" {
+    write_prompt review-pr 'description: Review a pull request with gitea-prs.' 'Review the PR with gitea-prs.'
+    ln "$PKG/.apm/prompts/review-pr.prompt.md" "$TMPDIR/review-pr.prompt.md"
+    run bash "$SCRIPT" "$PKG/.apm/prompts/review-pr.prompt.md"
+    assert_failure
+    assert_output --partial "is a hardlink"
+}