feat(kyberforge): add forge routing skill for factory artifact classification

Grills intent, classifies target artifact type (skill/agent/plugin/marketplace
entry) against a fully descriptive table, then routes to the matching author
skill via fork subagent (falling back to inline when fork is unavailable or
the flow needs live interaction). Adds an independent clean-context audit
recheck after each skill/agent route, looping author-then-audit until the
recheck comes back clean, since the author skill's own inline audit shares
context with the work it verifies. Updates CONTEXT.md's Skill composition
entry to describe this recheck loop and adds forge's provenance chain
(references/sources.md).

Refs Defame1297/holocron#61

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

plugins/kyberforge/skills/forge/references/sources.md

@@ -0,0 +1,81 @@
+# Sources
+
+## claude-code-subagents-docs
+
+- **URL:** https://code.claude.com/docs/en/sub-agents
+- **Research doc:** plugins/kyberforge/docs/research/docs/claude-code-plugins/sources.md
+- **Description:** Official Claude Code subagent reference — definition format, all frontmatter fields, scope priority, built-in agents, CLI flags, environment variables, known limitations. Grounds Step 3's fork-vs-inline invocation logic: fork inherits full conversation history via `/fork` or `subagent_type: "fork"`, is not a declarable frontmatter field on any agent definition, cannot be nested (a fork cannot spawn another fork), and is a caller-side invocation choice rather than a property of the artifact being routed to.
+- **Contributing files:** SKILL.md
+- **Status:** `extracted`
+
+## context7-websites-code-claude
+
+- **URL:** context7:/websites/code_claude
+- **Research doc:** plugins/kyberforge/docs/research/docs/claude-code-plugins/sources.md
+- **Description:** Official Claude Code documentation site indexed by Context7 — confirms the `context: fork` skill-level frontmatter field means isolated/fresh execution, the opposite of what the `/fork` subagent command does (inherits conversation). Informs the Gotchas entry warning against conflating the two.
+- **Contributing files:** SKILL.md
+- **Status:** `extracted`
+
+## claude-code-plugins-docs
+
+- **URL:** https://code.claude.com/docs/en/plugins
+- **Research doc:** plugins/kyberforge/docs/research/docs/claude-code-plugins/sources.md
+- **Description:** Official Claude Code plugin authoring guide — plugin structure, manifest fields, loading methods, skill namespacing, agent activation, marketplace submission. Background context for Step 2's plugin/marketplace rows; no forge-specific content drawn directly from it beyond that.
+- **Contributing files:** (none)
+- **Status:** `extracted`
+
+## agentskills-spec
+
+- **URL:** https://agentskills.io/specification.md
+- **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
+- **Description:** Complete SKILL.md format specification — confirms `assets/`, `references/`, and `scripts/` are warranted only by the bulk/reusability of supporting content (large reference material, executable code, templates), not by a skill's category. forge has none of that bulk, so a lean SKILL.md-plus-provenance-file shape is spec-legitimate; the `references/sources.md` in this directory exists for this repo's own provenance-chain convention (see `CONTEXT.md`), not because the spec requires it.
+- **Contributing files:** SKILL.md
+- **Status:** `extracted`
+
+## agentskills-home
+
+- **URL:** https://agentskills.io/home.md
+- **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
+- **Description:** Agent Skills overview — not drawn on directly for forge; listed for provenance completeness against the agentskillsio research doc.
+- **Contributing files:** (none)
+- **Status:** `extracted`
+
+## agentskills-best-practices
+
+- **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 — not drawn on directly for forge; listed for provenance completeness against the agentskillsio research doc.
+- **Contributing files:** (none)
+- **Status:** `extracted`
+
+## agentskills-optimizing-descriptions
+
+- **URL:** https://agentskills.io/skill-creation/optimizing-descriptions.md
+- **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
+- **Description:** How to test and improve skill descriptions for triggering accuracy — not drawn on directly for forge; listed for provenance completeness against the agentskillsio research doc.
+- **Contributing files:** (none)
+- **Status:** `extracted`
+
+## agentskills-evaluating-skills
+
+- **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 — not drawn on directly for forge; listed for provenance completeness against the agentskillsio research doc.
+- **Contributing files:** (none)
+- **Status:** `extracted`
+
+## agentskills-using-scripts
+
+- **URL:** https://agentskills.io/skill-creation/using-scripts.md
+- **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
+- **Description:** Using scripts in skills — not applicable to forge (no scripts/ directory); listed for provenance completeness against the agentskillsio research doc.
+- **Contributing files:** (none)
+- **Status:** `extracted`
+
+## agentskills-quickstart
+
+- **URL:** https://agentskills.io/skill-creation/quickstart.md
+- **Research doc:** plugins/kyberforge/docs/research/docs/agentskillsio/sources.md
+- **Description:** Step-by-step first-skill walkthrough — not drawn on directly for forge; listed for provenance completeness against the agentskillsio research doc.
+- **Contributing files:** (none)
+- **Status:** `extracted`