feat: consolidate marketplace skills into kyberforge plugin

Moves create-plugin, marketplace-architect, write-skill, and write-eval
from canonical .agents/skills/ into plugins/kyberforge/skills/, along
with all bundled sub-files, evals, and the plugin-marketplace-architecture
research doc. Bundles templates/plugin/ into create-plugin/assets/plugin-template/
so the skill is self-contained after install-time caching. Removes
templates/plugin/ and docs/research/plugin-marketplace-architecture.md
from the repo root as they are now exclusively in the plugin.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/kyberforge/skills/create-plugin/SKILL.md

@@ -24,7 +24,7 @@ metadata:
 
 ## Constraints
 
-- Verify `templates/plugin/` exists at the repo root before doing anything — stop if missing; do not generate files from memory.
+- Load the plugin template from `assets/plugin-template/` bundled inside this skill (`${CLAUDE_PLUGIN_ROOT}/skills/create-plugin/assets/plugin-template/`). Stop if the path is missing — do not generate files from memory.
 - Plugin name must be kebab-case and not a reserved name (`anthropic-*`, `claude-*`, `agent-skills`, `official-claude-plugins`) — halt and ask for a replacement before Gate A if violated.
 - Do not write any file until Gate A (plan approval) and Gate B (file contents approval) are both explicitly confirmed.
 - Replace all five placeholder markers — `PLUGIN_NAME`, `PLUGIN_DESCRIPTION`, `AUTHOR_NAME`, `AUTHOR_EMAIL`, `AUTHOR_URL` — in every copied file before Gate B review. No marker may appear in written output.
@@ -41,11 +41,11 @@ metadata:
 
 1. **Collect inputs.** Ask for plugin name, description, author name, author email, and author URL — one question at a time. Validate the plugin name: kebab-case format, not a reserved name, not already present in `plugins/` or `.claude-plugin/marketplace.json`. If any validation fails, stop and ask for a replacement before continuing.
 
-2. **Check template.** Verify `templates/plugin/` exists at the repo root. If missing, stop and report the path — do not proceed or generate files from memory.
+2. **Check template.** Load the bundled template from `assets/plugin-template/` inside this skill (`${CLAUDE_PLUGIN_ROOT}/skills/create-plugin/assets/plugin-template/`). If the path is missing, stop and report it — do not proceed or generate files from memory.
 
-3. **Gate A — plan review.** Present: the list of files that will be written (derived from `templates/plugin/` with `PLUGIN_NAME` substituted into filenames), the new `plugins/<name>/` directory path, the marketplace entry that will be added to `.claude-plugin/marketplace.json`, and whether `.github/plugin/marketplace.json` will also be updated. Wait for explicit approval — do not proceed on "looks good" or silence.
+3. **Gate A — plan review.** Present: the list of files that will be written (derived from `assets/plugin-template/` with `PLUGIN_NAME` substituted into filenames), the new `plugins/<name>/` directory path, the marketplace entry that will be added to `.claude-plugin/marketplace.json`, and whether `.github/plugin/marketplace.json` will also be updated. Wait for explicit approval — do not proceed on "looks good" or silence.
 
-4. **Copy and substitute.** Copy `templates/plugin/` to `plugins/<name>/`. In every copied file, replace all occurrences of `PLUGIN_NAME`, `PLUGIN_DESCRIPTION`, `AUTHOR_NAME`, `AUTHOR_EMAIL`, and `AUTHOR_URL` with the collected values. Rename any file or directory whose name contains `PLUGIN_NAME`.
+4. **Copy and substitute.** Copy `assets/plugin-template/` to `plugins/<name>/`. In every copied file, replace all occurrences of `PLUGIN_NAME`, `PLUGIN_DESCRIPTION`, `AUTHOR_NAME`, `AUTHOR_EMAIL`, and `AUTHOR_URL` with the collected values. Rename any file or directory whose name contains `PLUGIN_NAME`.
 
 5. **Gate B — file contents review.** Show every file with its full substituted content. Wait for explicit approval — do not write until confirmed.
 
@@ -57,7 +57,7 @@ metadata:
 
 ## Output format
 
-- `plugins/<name>/` — directory tree copied from `templates/plugin/` with all placeholders substituted
+- `plugins/<name>/` — directory tree copied from `assets/plugin-template/` with all placeholders substituted
 - `.claude-plugin/marketplace.json` — updated with the new plugin entry
 - `.github/plugin/marketplace.json` — updated with the same entry, only if it already existed
 - Inline validation report from `claude plugin validate .`
@@ -68,7 +68,7 @@ metadata:
 
 ## Failure handling
 
-- `templates/plugin/` not found — stop, report the path searched, do not generate from memory.
+- `assets/plugin-template/` not found at `${CLAUDE_PLUGIN_ROOT}/skills/create-plugin/assets/plugin-template/` — stop, report the path, do not generate from memory.
 - Plugin name already exists in `plugins/` or `marketplace.json` — stop, report the conflict, ask for a different name.
 - Reserved name detected — stop, report the name and the reserved list, ask for a replacement before continuing.
 - `claude plugin validate .` unavailable — report that automated validation was skipped; suggest running it manually with `claude --plugin-dir ./plugins/<name>`.
@@ -76,7 +76,7 @@ metadata:
 ## Self-check
 
 - [ ] Plugin name validated: kebab-case, not reserved, not already present in `plugins/` or `marketplace.json`
-- [ ] `templates/plugin/` verified to exist before any file generation
+- [ ] `assets/plugin-template/` verified to exist at `${CLAUDE_PLUGIN_ROOT}/skills/create-plugin/assets/plugin-template/` before any file generation
 - [ ] Gate A presented with file list and marketplace entry — explicit approval received
 - [ ] All five markers substituted in all files — none appear in written output
 - [ ] Gate B presented with full substituted file contents — explicit approval received