Consolidate 18 skills into 1 /impeccable skill with 20 commands

Biggest change in a while. Users previously had 18 standalone skill
entries cluttering their /menu; now they have one entry (/impeccable)
that routes to 20 specialized commands via argument dispatch. The pin
mechanism (/impeccable pin audit) restores standalone shortcuts on
demand for commands users hit all the time.

## Architecture

- Single /impeccable skill with command router section in SKILL.md
- 20 commands served via reference files under source/skills/impeccable/reference/
- /impeccable pin <command> creates a lightweight redirect shim so users
  who prefer /audit, /polish, etc. can still have them
- Context gathering (teach) auto-runs on first use
- command-metadata.json is the single source of truth for command
  descriptions, argument hints, and relationships

## Site rewrite

- Docs URL: /skills renamed to /docs (with /skills permanent redirects)
- Homepage hero frames Impeccable as "one skill with 20 commands"
- "Get Started" split into 50/50 install + how-to-use with editorial
  numbered steps, /impeccable shown as the home command with three modes
- New /docs overview: home command hero card + dense category rows
  matching the old cheatsheet density, with leads-to/pairs-with/
  combines-with relationship metadata served from a shared source
- Cheatsheet merged into /docs, /cheatsheet redirects
- Magazine spread and mobile cards show /impeccable as a stacked
  namespace label above the command name at full display size
- Periodic table updated with craft/teach/extract as first-class cells
- Skill detail pages generate from reference files, with an editorial
  wrapper per command for tagline + body
- Tutorials and anti-patterns pages updated to use /impeccable <cmd>

## Build system

- Dead code removed (scripts/lib/transformers/shared.js)
- Build log wording fixed ("1 skill" not "1 skills (1 user-invocable)")
- generateApiData fallback branch removed (throws loudly if metadata
  missing instead of silently degrading)
- Commands API includes editorial tagline alongside the long description;
  UI surfaces prefer tagline for human display, description for auto-
  trigger keyword matching

## Gitignore

- Added .claude/scheduled_tasks.lock, .claude/settings.local.json to
  ignore list (local Claude Code state that should not be tracked).
- Harness skill directories (.claude/skills/, .agents/skills/, etc.)
  remain tracked by design: npx skills reads them from this repo at
  install time and they enable clean submodule use.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/lib/utils.js

@@ -426,13 +426,33 @@ const EXCLUDED_FROM_SUGGESTIONS = new Set([
   'frontend-design', 'i-frontend-design',      // deprecated shim
 ]);
 
+// Sub-commands of /impeccable that should appear in {{available_commands}}.
+// These are the commands that audit/critique/etc. reference when suggesting next steps.
+const IMPECCABLE_SUB_COMMANDS = [
+  'adapt', 'animate', 'audit', 'bolder', 'clarify', 'colorize',
+  'critique', 'delight', 'distill', 'harden', 'layout', 'optimize',
+  'overdrive', 'polish', 'quieter', 'shape', 'typeset',
+];
+
 export function replacePlaceholders(content, provider, commandNames = [], allSkillNames = []) {
   const placeholders = PROVIDER_PLACEHOLDERS[provider] || PROVIDER_PLACEHOLDERS['cursor'];
   const cmdPrefix = placeholders.command_prefix || '/';
-  const commandList = commandNames
-    .filter(n => !EXCLUDED_FROM_SUGGESTIONS.has(n))
-    .map(n => `${cmdPrefix}${n}`)
-    .join(', ');
+
+  // Build the available_commands list.
+  // After the v3.0 consolidation, commands are sub-commands of /impeccable.
+  // If there's only one user-invocable skill (impeccable), generate sub-command references.
+  // Otherwise fall back to listing skill names (backwards compat for forks).
+  const nonExcluded = commandNames.filter(n => !EXCLUDED_FROM_SUGGESTIONS.has(n));
+  let commandList;
+  if (nonExcluded.length === 0) {
+    // Single-skill architecture: list sub-commands as /impeccable <sub>
+    commandList = IMPECCABLE_SUB_COMMANDS
+      .map(n => `${cmdPrefix}impeccable ${n}`)
+      .join(', ');
+  } else {
+    // Multi-skill architecture (backwards compat)
+    commandList = nonExcluded.map(n => `${cmdPrefix}${n}`).join(', ');
+  }
 
   let result = content
     .replace(/\{\{model\}\}/g, placeholders.model)