web+coder: discover Claude's enabled commands + plugin skills; icon-split commands vs skills

claude is PTY (no ACP discovery), so claude-command-discovery.ts reads its enabled set from disk (user-global): ~/.claude/commands/*.md + every enabled plugin's skills/<name>/SKILL.md (kind=skill) and commands/*.md (kind=command), from ~/.claude/settings.json:enabledPlugins + installed_plugins.json install paths, frontmatter-parsed, bare names, deduped. The snapshot claude branch discovers these live (snapshot cache rate-limits the reads). The coder / menu now shows up to three icon'd groups: <agent> commands (Terminal), <agent> skills (Puzzle), BooCoder skills (Sparkles) via a new optional icon on SlashCommandGroup. AgentCommand gains a kind field in both coder + web copies (parity test enforces); mergeCommandsByName made generic to preserve it. Invocation unchanged (literal /name -> claude). Project-local plugins deferred. BooChat unaffected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/coder/src/services/provider-snapshot.ts

@@ -16,6 +16,7 @@ import { getManifestCommands, mergeCommands } from './provider-commands.js';
 import { readQwenSettingsModels } from './qwen-settings.js';
 import { getResolvedRegistry, type ResolvedProviderDef } from './provider-config-registry.js';
 import { isCommandAvailable } from './command-availability.js';
+import { discoverClaudeCommands } from './claude-command-discovery.js';
 
 interface AgentRow {
   name: string;
@@ -149,10 +150,12 @@ async function buildProviderEntry(
 
   // claude: static models + thinking options, no ACP probe (unchanged from v2.2).
   if (name === 'claude') {
+    // claude is PTY (no ACP discovery) — read its enabled commands + plugin
+    // skills from disk live (the snapshot cache rate-limits the fs reads).
     return {
       name, label, transport, status: 'ready', enabled: true, installed: true,
       models: attachClaudeThinking(withConfigModels(models)), modes: fallbackModes, defaultModeId,
-      commands: manifestCommands,
+      commands: mergeCommands(manifestCommands, discoverClaudeCommands()),
     };
   }