feat(kyberforge): enforce the ADR-0020 context contract for skills and agents

Skill name+description pairs are preloaded into every session, costing
~6,200 tokens across 39 skills before any skill is invoked. The authoring
rules mandated that growth: skill-author:104 and description-quality.md:21
both required padding, while skill-author:102 (the deflating rule) had no
FAIL condition behind it.

Gates (blocking, no baseline file):
- description 250 chars SUGGESTION / 400 FAIL, measured on the folded
  YAML value
- body-only 600 words SUGGESTION / 900 FAIL, independent of the unchanged
  whole-file 2770-word / 500-line spec backstop
- every boundary-clause routing target must resolve to a real skill or
  agent; catches skill-improve, neuledge-context and gitea-labels
- agents take the description gates but deliberately no body gate; a test
  pins that absence

Vale: DescriptionOpener widened to ^This\b, new CompositionNote rule
banning architecture notes from descriptions. 10 hits, 0 false positives.

Kyberforge's own four skills retrofitted: descriptions 3,364 -> 938 chars
(-72%), bodies 8,306 -> 2,487 words (-70%), all via the apm-workflow
dispatch pattern. Fixes the skill-improve dangling route and the
agent-author misroute to manual review.

Also fixes a pre-existing false positive where any line-initial 'read '
was flagged as interactive input, which had already caused two scripts to
be rewritten around it.

Refs: ADR-0020

.pre-commit-config.yaml

@@ -255,12 +255,21 @@ repos:
 
       - id: skill-size-check
         stages: ['pre-commit']
-        name: SKILL.md size ceiling
-        description: Enforce agentskills.io's 500-line/5,000-token SKILL.md size ceiling
+        name: SKILL.md size and context-budget ceilings
+        description: Enforce agentskills.io's 500-line/2,770-whole-file-word spec ceilings AND ADR-0020's context budget -- description 250 chars SUGGESTION / 400 FAIL, body-only 600 words SUGGESTION / 900 FAIL, and every boundary-clause routing target resolving to a real skill or agent under plugins/*/.apm/
         entry: scripts/skill-size-check.sh
         language: script
         files: '^plugins/[^/]+/\.apm/skills/[^/]+/SKILL\.md$'
         pass_filenames: true
+        verbose: true
+        # verbose so the SUGGESTION tier is audible. ADR-0020 depends on it:
+        # "A ceiling does not produce an average ... The halving depends
+        # entirely on the 250-character SUGGESTION tier being visible and
+        # respected." pre-commit prints nothing at all for a passing hook, and
+        # a SUGGESTION deliberately does not fail, so without verbose every
+        # suggestion would be swallowed -- the exact invisibility ADR-0013
+        # records for Vale warnings. Costs nothing on a clean file: the script
+        # prints only findings.
 
       - id: vale-audit-prefilter-skill
         stages: ['pre-commit']