[core] AGENTS.md

.pre-commit-config.yaml

@@ -67,6 +67,7 @@ repos:
         exclude: |
           (?x)^(
               entrypoint.sh|
+              AGENTS.md|
               .pre-commit-config.yaml|
               ^src/core/engines/webjs/session.webjs.core.ts|
               ^src/core/engines/webjs/_lodash.js|

AGENTS.md

@@ -0,0 +1,124 @@
+# WAHA Agent Playbook
+
+This guide summarizes how to explore, modify, and validate the WhatsApp HTTP API
+(WAHA) codebase when assisting as an automation or coding agent.
+
+## Product & Variants
+
+- WAHA ships in **Core** and **Plus** editions. Core lives under `src/core` and
+  only supports the default session plus minimal media features. Plus extends
+  core via `src/plus` to add multi-session orchestration, richer media handling,
+  and external storage integrations.
+- Core code must remain free from Plus-only references. A pre-commit hook
+  rejects the word `plus` inside core files; reuse abstractions exposed through
+  `@waha/core/**` instead of importing Plus modules from Core.
+- Commit subjects are validated: changes that touch `src/plus` require a
+  `[PLUS] …` prefix and must not include non-Plus files; everything else must
+  use `[core] …`. Verify against `./.precommit/validate_commit_message.py` if
+  unsure.
+
+## Tech Stack Snapshot
+
+- **Runtime**: Node.js 22.x, Yarn 3.6 (Berry). Always install packages and run
+  scripts with Yarn.
+- **Framework**: NestJS v11 with dependency injection, modular controllers in
+  `src/api`, and Pino-based logging via `nestjs-pino`.
+- **Engines**: WhatsApp engines are abstracted (`WEBJS`, `GOWS`, `NOWEB`). Core
+  uses `SessionManagerCore`; Plus swaps to `SessionManagerPlus` with extra
+  storage backends (Mongo/Postgres/SQLite).
+- **ESM Bridge**: ESM-only dependencies (Baileys) load through
+  `src/vendor/esm.ts`. Add new ESM modules there to ensure they load exactly
+  once.
+- **Utilities**: RxJS streams (`SwitchObservable`, `DefaultMap`) drive webhook
+  event fan-out. Prefer existing helpers in `src/utils` and `src/core/utils`
+  before adding bespoke logic.
+
+## Repository Landmarks
+
+- `src/main.ts`: runtime entry point; dynamically loads the correct AppModule
+  (Core vs Plus) and configures global interceptors/filters.
+- `src/api/**`: REST controllers and WebSocket gateway. Keep handlers thin;
+  delegate to managers/services. HTTP routes follow `/api/{sessionName}/…`;
+  always thread the session name through request DTOs and guards instead of
+  hardcoding `default`.
+- `src/core/**`: shared abstractions (config services, engine bootstrap,
+  storage, session management). Core only allows the `default` session and
+  cleans up storage on boot.
+- `src/plus/**`: multi-session orchestration, advanced media services, and
+  external persistence layers (Mongo, Postgres). Reuse this layer when adding
+  Plus-only capabilities.
+- `src/apps/**`: integrations (e.g., ChatWoot) and application-specific
+  services.
+- `src/structures/**` and `src/utils/**`: DTOs, enums (event names follow
+  `domain.action`), helper utilities. Maintain naming consistency when
+  introducing new events.
+- `tests/**`: Jest-based suites; do not add new tests unless explicitly asked,
+  but keep existing tests working.
+
+## Coding Expectations
+
+- Favor composable, long-lived solutions. If a helper already exists (e.g.,
+  `parseBool`, `DefaultMap`, media factories), extend it instead of reinventing
+  logic. Lodash ships with the project—prefer its utilities over hand-rolled
+  helpers. Import lodash as a namespace (`import * as lodash from 'lodash';`) so
+  helpers like `lodash.camelCase` stay consistent across files. When a new
+  third-party library seems necessary, confirm with the user, especially if the
+  package looks stale.
+- Stick to NestJS patterns: inject dependencies through constructors, expose
+  provider tokens from modules, and keep controllers free from business logic.
+- Logging goes through injected `PinoLogger` or helpers in
+  `src/utils/logging.ts`. `console.log` is blocked by pre-commit.
+- Respect path aliases (`@waha/...`) defined in `tsconfig.json`; keep imports
+  consistent (use absolute aliases, not relative `../../../`).
+- Avoid naming unused variables with a leading underscore; if a parameter is
+  required by a signature, explicitly `void` it instead.
+- For configs, prefer runtime configurability over constants. Environment keys
+  follow `WAHA_*` for global values and `WAHA_SESSION_CONFIG_*` /
+  `session.config.*` for per-session overrides. If both env and config are
+  supported, honor both (`WAHA_WEBJS_CONFIG_*` vs. `session.webjs.config.*`).
+
+## Language & Localization
+
+- Keep identifiers (classes, methods, variables) and code comments in English so
+  the codebase stays consistent for the global team.
+- Route user-visible strings through the existing i18n structure rather than
+  hardcoding text. ChatWoot copy belongs in `src/apps/chatwoot/i18n` with
+  English as the source locale before adding translations.
+
+## ChatWoot Integration Notes
+
+- Avoid introducing synthetic events; map onto existing webhook or engine events
+  whenever plausible. Always use the official ChatWoot API client located in
+  `src/apps/chatwoot/client`.
+- When adding events, align consumer names with webhook/event identifiers (e.g.,
+  `message.any`).
+
+## Workflow Checklist
+
+1. Identify whether work targets Core, Plus, or shared layers. If Plus-only,
+   isolate changes to `src/plus` and ensure the commit prefix matches.
+2. Lean on existing services/managers; extend the appropriate session manager
+   rather than branching logic inline.
+3. After edits run:
+   - `pre-commit run --all-files`
+   - `yarn build`
+   - `yarn test` Use Node 22. Address lint or formatting issues before
+     proceeding.
+4. Do **not** start the application yourself; ask the user to run it if runtime
+   validation is required.
+5. Capture any assumptions or open questions for the user, especially when
+   touching configs, introducing dependencies, or modifying public APIs.
+
+## Additional Tips
+
+- Concurrency-sensitive sections (session start/stop) rely on `async-lock`. When
+  adding async flows, reuse `SessionManager.withLock` or existing retry
+  utilities (`promiseTimeout`, `waitUntil`).
+- Media features centralize through `MediaManager` and `MediaStorageFactory`.
+  When altering media behavior, update both Core and Plus variants where
+  applicable.
+- Keep docs and code ASCII unless a file already uses other characters. When
+  updating documentation, mirror the concise, actionable tone used here.
+
+Following this playbook keeps contributions aligned with WAHA’s structure,
+automation hooks, and release process.