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

plugins/kyberforge/.apm/skills/skill-author/references/sources.md

@@ -18,7 +18,7 @@ source_keys:
 - **URL:** https://agentskills.io/home.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** Agent Skills overview — what it is, why it exists, progressive disclosure model, ecosystem of 35+ implementing tools
-- **Contributing files:** SKILL.md
+- **Contributing files:** SKILL.md, references/create.md
 - **Status:** `extracted`
 
 ## agentskills-spec
@@ -26,7 +26,7 @@ source_keys:
 - **URL:** https://agentskills.io/specification.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** Complete SKILL.md format specification — frontmatter fields, constraints, body content, optional directories, progressive disclosure levels, file references, validation
-- **Contributing files:** SKILL.md, references/deployment-modes.md
+- **Contributing files:** SKILL.md, references/create.md, references/contract.md, references/deployment-modes.md
 - **Status:** `extracted`
 
 ## agentskills-best-practices
@@ -34,7 +34,7 @@ source_keys:
 - **URL:** https://agentskills.io/skill-creation/best-practices.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** Best practices for skill creators — starting from real expertise, spending context wisely, calibrating control, instruction patterns (gotchas, templates, checklists, validation loops)
-- **Contributing files:** SKILL.md
+- **Contributing files:** SKILL.md, references/create.md, references/improve.md, references/contract.md
 - **Status:** `extracted`
 
 ## agentskills-optimizing-descriptions
@@ -42,7 +42,7 @@ source_keys:
 - **URL:** https://agentskills.io/skill-creation/optimizing-descriptions.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** How to systematically test and improve skill descriptions for triggering accuracy — eval queries, trigger rate testing, train/validation splits, optimization loop
-- **Contributing files:** SKILL.md
+- **Contributing files:** SKILL.md, references/improve.md, references/contract.md
 - **Status:** `extracted`
 
 ## agentskills-evaluating-skills
@@ -50,7 +50,7 @@ source_keys:
 - **URL:** https://agentskills.io/skill-creation/evaluating-skills.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** Eval-driven skill quality improvement — test case design, workspace structure, assertion writing, grading, benchmarking, human review, iteration loop
-- **Contributing files:** SKILL.md
+- **Contributing files:** SKILL.md, references/improve.md
 - **Status:** `extracted`
 
 ## agentskills-using-scripts
@@ -58,7 +58,7 @@ source_keys:
 - **URL:** https://agentskills.io/skill-creation/using-scripts.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** Using scripts in skills — one-off commands, self-contained scripts with inline dependencies, designing scripts for agentic use (no interactive prompts, --help, structured output, idempotency)
-- **Contributing files:** SKILL.md, references/scripts.md
+- **Contributing files:** SKILL.md, references/create.md, references/scripts.md
 - **Status:** `extracted`
 
 ## agentskills-quickstart
@@ -66,5 +66,5 @@ source_keys:
 - **URL:** https://agentskills.io/skill-creation/quickstart.md
 - **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
 - **Description:** Step-by-step guide to creating a first skill (roll-dice example), how discovery/activation/execution work in practice
-- **Contributing files:** SKILL.md
+- **Contributing files:** SKILL.md, references/create.md
 - **Status:** `extracted`