refactor: implement multi-channel architecture (#500)

* refactor: implement channel architecture and dynamic setup

- Introduced ChannelRegistry for dynamic channel loading
- Decoupled WhatsApp from core index.ts and config.ts
- Updated setup wizard to support ENABLED_CHANNELS selection
- Refactored IPC and group registration to be channel-aware
- Verified with 359 passing tests and clean typecheck

* style: fix formatting in config.ts to pass CI

* refactor(setup): full platform-agnostic transformation

- Harmonized all instructional text and help prompts
- Implemented conditional guards for WhatsApp-specific steps
- Normalized CLI terminology across all 4 initial channels
- Unified troubleshooting and verification logic
- Verified 369 tests pass with clean typecheck

* feat(skills): transform WhatsApp into a pluggable skill

- Created .claude/skills/add-whatsapp with full 5-phase interactive setup
- Fixed TS7006 'implicit any' error in IpcDeps
- Added auto-creation of STORE_DIR to prevent crashes on fresh installs
- Verified with 369 passing tests and clean typecheck

* refactor(skills): move WhatsApp from core to pluggable skill

- Move src/channels/whatsapp.ts to add-whatsapp skill add/ folder
- Move src/channels/whatsapp.test.ts to skill add/ folder
- Move src/whatsapp-auth.ts to skill add/ folder
- Create modify/ for barrel file (src/channels/index.ts)
- Create tests/ with skill package validation test
- Update manifest with adds/modifies lists
- Remove WhatsApp deps from core package.json (now skill-managed)
- Remove WhatsApp-specific ghost language from types.ts
- Update SKILL.md to reflect skill-apply workflow

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

* refactor(skills): move setup/whatsapp-auth.ts into WhatsApp skill

The WhatsApp auth setup step is channel-specific — move it from core
to the add-whatsapp skill so core stays minimal.

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

* refactor(skills): convert Telegram skill to pluggable channel pattern

Replace the old direct-integration approach (modifying src/index.ts,
src/config.ts, src/routing.test.ts) with self-registration via the
channel registry, matching the WhatsApp skill pattern.

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

* fix(skills): fix add-whatsapp build failure and improve auth flow

- Add missing @types/qrcode-terminal to manifest npm_dependencies
  (build failed after skill apply without it)
- Make QR-browser the recommended auth method (terminal QR too small,
  pairing codes expire too fast)
- Remove "replace vs alongside" question — channels are additive
- Add pairing code retry guidance and QR-browser fallback

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

* fix: remove hardcoded WhatsApp default and stale Baileys comment

- ENABLED_CHANNELS now defaults to empty (fresh installs must configure
  channels explicitly via /setup; existing installs already have .env)
- Remove Baileys-specific comment from storeMessageDirect() in db.ts

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

* refactor(skills): convert Discord, Slack, Gmail skills to pluggable channel pattern

All channel skills now use the same self-registration pattern:
- registerChannel() factory at module load time
- Barrel file append (src/channels/index.ts) instead of orchestrator modifications
- No more *_ONLY flags (DISCORD_ONLY, SLACK_ONLY) — use ENABLED_CHANNELS instead
- Removed ~2500 lines of old modify/ files (src/index.ts, src/config.ts, src/routing.test.ts)

Gmail retains its container-runner.ts and agent-runner modifications (MCP
mount + server config) since those are independent of channel wiring.

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

* refactor: use getRegisteredChannels instead of ENABLED_CHANNELS

Remove the ENABLED_CHANNELS env var entirely. The orchestrator now
iterates getRegisteredChannelNames() from the channel registry —
channels self-register via barrel imports and their factories return
null when credentials are missing, so unconfigured channels are
skipped automatically.

Deleted setup/channels.ts (and its tests) since its sole purpose was
writing ENABLED_CHANNELS to .env. Refactored verify, groups, and
environment setup steps to detect channels by credential presence
instead of reading ENABLED_CHANNELS.

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

* docs: add breaking change notice and whatsapp migration instructions

CHANGELOG.md documents the pluggable channel architecture shift and
provides migration steps for existing WhatsApp users.

CLAUDE.md updated: Quick Context reflects multi-channel architecture,
Key Files lists registry.ts instead of whatsapp.ts, and a new
Troubleshooting section directs users to /add-whatsapp if WhatsApp
stops connecting after upgrade.

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

* docs: rewrite READMEs for pluggable multi-channel architecture

Reflects the architectural shift from a hardcoded WhatsApp bot to a
pluggable channel platform. Adds upgrading notice, Mermaid architecture
diagram, CI/License/TypeScript/PRs badges, and clarifies that slash
commands run inside the Claude Code CLI.

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

* docs: move pluggable channel architecture details to SPEC.md

Revert READMEs to original tone with only two targeted changes:
- Add upgrading notice for WhatsApp breaking change
- Mention pluggable channels in "What It Supports"

Move Mermaid diagram, channel registry internals, factory pattern
explanation, and self-registration walkthrough into docs/SPEC.md.
Update stale WhatsApp-specific references in SPEC.md to be
channel-agnostic.

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

* docs: move upgrading notice to CHANGELOG, add changelog link

Remove the "Upgrading from Pre-Pluggable Versions" section from
README.md — breaking change details belong in the CHANGELOG. Add a
Changelog section linking to CHANGELOG.md.

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

* docs: expand CHANGELOG with full PR #500 changes

Cover all changes: channel registry, WhatsApp moved to skill, removed
core dependencies, all 5 skills simplified, orchestrator refactored,
setup decoupled. Use Claude Code CLI instructions for migration.

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

* chore: bump version to 1.2.0 for pluggable channel architecture

Minor version bump — new functionality (pluggable channels) with a
managed migration path for existing WhatsApp users. Update version
references in CHANGELOG and update skill.

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

* Fix skill application

* fix: use slotted barrel file to prevent channel merge conflicts

Pre-allocate a named comment slot for each channel in
src/channels/index.ts, separated by blank lines. Each skill's
modify file only touches its own slot, so three-way merges
never conflict when applying multiple channels.

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

* fix: resolve real chat ID during setup for token-based channels

Instead of registering with `pending@telegram` (which never matches
incoming messages), the setup skill now runs an inline bot that waits
for the user to send /chatid, capturing the real chat ID before
registration.

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

* fix: setup delegates to channel skills, fix group sync and Discord metadata

- Restructure setup SKILL.md to delegate channel setup to individual
  channel skills (/add-whatsapp, /add-telegram, etc.) instead of
  reimplementing auth/registration inline with broken placeholder JIDs
- Move channel selection to step 5 where it's immediately acted on
- Fix setup/groups.ts: write sync script to temp file instead of passing
  via node -e which broke on shell escaping of newlines
- Fix Discord onChatMetadata missing channel and isGroup parameters
- Add .tmp-* to .gitignore for temp sync script cleanup

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

* fix: align add-whatsapp skill with main setup patterns

Add headless detection for auth method selection, structured inline
error handling, dedicated number DM flow, and reorder questions to
match main's trigger-first flow.

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

* fix: add missing auth script to package.json

The add-whatsapp skill adds src/whatsapp-auth.ts but doesn't add
the corresponding npm script. Setup and SKILL.md reference `npm run auth`
for WhatsApp QR terminal authentication.

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

* fix: update Discord skill tests to match onChatMetadata signature

The onChatMetadata callback now takes 5 arguments (jid, timestamp,
name, channel, isGroup) but the Discord skill tests only expected 3.
This caused skill application to roll back on test failure.

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

* docs: replace 'pluggable' jargon with clearer language

User-facing text now says "multi-channel" or describes what it does.
Developer-facing text uses "self-registering" or "channel registry".
Also removes extra badge row from README.

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

* docs: align Chinese README with English version

Remove extra badges, replace pluggable jargon, remove upgrade section
(now in CHANGELOG), add missing intro line and changelog section,
fix setup FAQ answer.

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

* fix: warn on installed-but-unconfigured channels instead of silent skip

Channels with missing credentials now emit WARN logs naming the exact
missing variable, so misconfigurations surface instead of being hidden.

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

* docs: simplify changelog to one-liner with compare link

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

* feat: add isMain flag and channel-prefixed group folders

Replace MAIN_GROUP_FOLDER constant with explicit isMain boolean on
RegisteredGroup. Group folders now use channel prefix convention
(e.g., whatsapp_main, telegram_family-chat) to prevent cross-channel
collisions.

- Add isMain to RegisteredGroup type and SQLite schema (with migration)
- Replace all folder-based main group checks with group.isMain
- Add --is-main flag to setup/register.ts
- Strip isMain from IPC payload (defense in depth)
- Update MCP tool description for channel-prefixed naming
- Update all channel SKILL.md files and documentation

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

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: gavrielc <gabicohen22@yahoo.com>
Co-authored-by: Koshkoshinski <daniel.milliner@gmail.com>

setup/register.ts

@@ -1,8 +1,8 @@
 /**
  * Step: register — Write channel registration config, create group folders.
- * Replaces 06-register-channel.sh
  *
- * Fixes: SQL injection (parameterized queries), sed -i '' (uses fs directly).
+ * Accepts --channel to specify the messaging platform (whatsapp, telegram, slack, discord).
+ * Uses parameterized SQL queries to prevent injection.
  */
 import fs from 'fs';
 import path from 'path';
@@ -19,7 +19,9 @@ interface RegisterArgs {
   name: string;
   trigger: string;
   folder: string;
+  channel: string;
   requiresTrigger: boolean;
+  isMain: boolean;
   assistantName: string;
 }
 
@@ -29,7 +31,9 @@ function parseArgs(args: string[]): RegisterArgs {
     name: '',
     trigger: '',
     folder: '',
+    channel: 'whatsapp', // backward-compat: pre-refactor installs omit --channel
     requiresTrigger: true,
+    isMain: false,
     assistantName: 'Andy',
   };
 
@@ -47,9 +51,15 @@ function parseArgs(args: string[]): RegisterArgs {
       case '--folder':
         result.folder = args[++i] || '';
         break;
+      case '--channel':
+        result.channel = (args[++i] || '').toLowerCase();
+        break;
       case '--no-trigger-required':
         result.requiresTrigger = false;
         break;
+      case '--is-main':
+        result.isMain = true;
+        break;
       case '--assistant-name':
         result.assistantName = args[++i] || 'Andy';
         break;
@@ -83,8 +93,10 @@ export async function run(args: string[]): Promise<void> {
 
   logger.info(parsed, 'Registering channel');
 
-  // Ensure data directory exists
+  // Ensure data and store directories exist (store/ may not exist on
+  // fresh installs that skip WhatsApp auth, which normally creates it)
   fs.mkdirSync(path.join(projectRoot, 'data'), { recursive: true });
+  fs.mkdirSync(STORE_DIR, { recursive: true });
 
   // Write to SQLite using parameterized queries (no SQL injection)
   const dbPath = path.join(STORE_DIR, 'messages.db');
@@ -100,13 +112,16 @@ export async function run(args: string[]): Promise<void> {
     trigger_pattern TEXT NOT NULL,
     added_at TEXT NOT NULL,
     container_config TEXT,
-    requires_trigger INTEGER DEFAULT 1
+    requires_trigger INTEGER DEFAULT 1,
+    is_main INTEGER DEFAULT 0
   )`);
 
+  const isMainInt = parsed.isMain ? 1 : 0;
+
   db.prepare(
     `INSERT OR REPLACE INTO registered_groups
-     (jid, name, folder, trigger_pattern, added_at, container_config, requires_trigger)
-     VALUES (?, ?, ?, ?, ?, NULL, ?)`,
+     (jid, name, folder, trigger_pattern, added_at, container_config, requires_trigger, is_main)
+     VALUES (?, ?, ?, ?, ?, NULL, ?, ?)`,
   ).run(
     parsed.jid,
     parsed.name,
@@ -114,6 +129,7 @@ export async function run(args: string[]): Promise<void> {
     parsed.trigger,
     timestamp,
     requiresTriggerInt,
+    isMainInt,
   );
 
   db.close();
@@ -134,7 +150,7 @@ export async function run(args: string[]): Promise<void> {
 
     const mdFiles = [
       path.join(projectRoot, 'groups', 'global', 'CLAUDE.md'),
-      path.join(projectRoot, 'groups', 'main', 'CLAUDE.md'),
+      path.join(projectRoot, 'groups', parsed.folder, 'CLAUDE.md'),
     ];
 
     for (const mdFile of mdFiles) {
@@ -174,6 +190,7 @@ export async function run(args: string[]): Promise<void> {
     JID: parsed.jid,
     NAME: parsed.name,
     FOLDER: parsed.folder,
+    CHANNEL: parsed.channel,
     TRIGGER: parsed.trigger,
     REQUIRES_TRIGGER: parsed.requiresTrigger,
     ASSISTANT_NAME: parsed.assistantName,