# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## What this is

**Gitmost** is a community fork of [Docmost](https://github.com/docmost/docmost) — an open-source collaborative wiki / documentation app. The fork's defining constraint: **100% open, AGPL-only, with no Enterprise-Edition (EE) code**. The upstream `apps/server/src/ee`, `apps/client/src/ee` and `packages/ee` directories were deleted; there is no license gating or feature-flag wall. Features that upstream hides behind the enterprise license (comment resolution, the embedded `/mcp` server, the AI agent chat) are **re-implemented from scratch** on the community codebase.

**Naming gotcha:** only the *product* is rebranded. Internal identifiers are still `docmost` everywhere — npm package names (`docmost`, `@docmost/mcp`, `@docmost/editor-ext`), the default DB name, env-var prefixes (`MCP_DOCMOST_*`), and the TS path aliases (`@docmost/db/*`, `@docmost/transactional/*`). Do not "fix" these to `gitmost`; they are load-bearing for Docmost data/image compatibility (the DB schema is a strict superset of Docmost's, so an existing instance migrates by swapping images).

## Monorepo layout

pnpm workspace (`pnpm@10.4.0`) orchestrated by **Nx**. Four workspace packages:

| Path | Name | Stack | Role |
| --- | --- | --- | --- |
| `apps/server` | `server` | NestJS 11 + Fastify, Kysely (Postgres), Redis | Backend API, collaboration, AI |
| `apps/client` | `client` | React 18 + Vite + Mantine 8 + TanStack Query + Jotai | SPA frontend |
| `packages/editor-ext` | `@docmost/editor-ext` | Tiptap/ProseMirror | Shared Tiptap node/mark extensions, imported by both the client and the server |
| `packages/mcp` | `@docmost/mcp` | MCP SDK, Tiptap, Yjs | Standalone MCP server, also bundled into the server at `/mcp`. Does **not** import `editor-ext` — it keeps its own vendored mirror of the schema in `packages/mcp/src/lib/` |

`build` targets are Nx-cached and dependency-ordered (`dependsOn: ["^build"]`), so `editor-ext` builds before the apps. `nx.json` sets `affected.defaultBase: main`.

## Commands

Run from the repo root unless noted. The dev workflow needs **Postgres (with the `pgvector` extension) and Redis** reachable per `.env` (copy `.env.example` → `.env`).

```bash
pnpm install                 # install all workspaces (uses pnpm patches; see package.json `pnpm.patchedDependencies`)
pnpm dev                     # client (Vite) + server (Nest watch) concurrently — primary dev loop
pnpm client:dev              # frontend only (Vite proxies /api to APP_URL)
pnpm server:dev              # backend only (nest start --watch)
pnpm build                   # nx run-many -t build (all packages)
pnpm collab:dev              # run the collaboration server process standalone (see "Two server processes")
```

**Lint** (per package — there is no root lint script):
```bash
pnpm --filter server lint    # eslint --fix on server .ts
pnpm --filter client lint    # eslint on client
```

**Tests** (per package — no root test script):
```bash
pnpm --filter server test                       # Jest, matches *.spec.ts under src
pnpm --filter server test -- ai-chat.service     # single file by name pattern
pnpm --filter server test -- -t "resolves a comment"   # single test by name
pnpm --filter client test                       # Vitest (vitest run)
pnpm --filter client test -- message-list        # single Vitest file by name
pnpm --filter @docmost/mcp test                  # node --test (unit + mock)
pnpm --filter @docmost/mcp test:e2e              # MCP end-to-end against a live instance
```

**Database migrations** (Kysely, run from `apps/server`; they auto-run on server startup too):
```bash
pnpm --filter server migration:create --name=my_change   # new empty migration
pnpm --filter server migration:latest                    # apply all pending
pnpm --filter server migration:down                      # revert last
pnpm --filter server migration:codegen                   # regenerate src/database/types/db.d.ts from the live DB
```
Migration files live in `apps/server/src/database/migrations/` and are named `YYYYMMDDThhmmss-description.ts`. Fork-specific migrations only **add** tables (`page_embeddings`, `ai_chats`, `ai_chat_messages`, `ai_provider_credentials`, `ai_mcp_servers`) and nullable columns — never drop/rewrite Docmost data.

## Architecture — the big picture

### Two server processes
`apps/server` builds one codebase but runs as **two distinct entrypoints**, both required in production:
- **API server** — `dist/main` (`apps/server/src/main.ts`), the Fastify HTTP app (`AppModule`).
- **Collaboration server** — `dist/collaboration/server/collab-main` (`pnpm collab`), a Hocuspocus/Yjs WebSocket server (`apps/server/src/collaboration/`) handling real-time document editing, persistence, and page-history snapshots. It listens on `COLLAB_PORT` (default `3001`), separate from the API server's `PORT` (default `3000`), and shares state with the API server through Redis.

The API server is a Fastify app with a global `/api` prefix (`main.ts` excludes `robots.txt`, public share pages, and `mcp` from the prefix). A `preHandler` hook enforces that a resolved `workspaceId` exists for most `/api` routes (multi-tenant by hostname/subdomain via `DomainMiddleware`). Auth is JWT (cookie + bearer); authorization is **CASL** (`core/casl`) — every data access is scoped to the user's abilities.

### Module structure (server)
`AppModule` wires integration modules (`integrations/*`: storage [local/S3/Azure], mail, queue [BullMQ on Redis], security, telemetry, throttle, `mcp`, `ai`) plus `CoreModule`, `DatabaseModule`, and `CollaborationModule`. `CoreModule` (`core/*`) holds the domain modules: `page`, `space`, `comment`, `workspace`, `user`, `auth`, `group`, `attachment`, `search`, `share`, `ai-chat`, etc. Each domain module follows NestJS controller → service → repo layering; DB repos live under `database/repos` and are injected app-wide from the global `DatabaseModule`.

**EE removal artifact:** `app.module.ts` still contains a `try/require('./ee/ee.module')` stub. That path no longer exists, so the require fails and is swallowed (it only hard-exits when `CLOUD === 'true'`). Treat EE as gone — do not add code that depends on it.

### Persistence
- **Postgres via Kysely** (`nestjs-kysely`), typed by the generated `src/database/types/db.d.ts`. Use the camelCase Kysely query builder, not an ORM. After schema changes, write a migration *and* regenerate the DB types.
- **pgvector is mandatory** — the RAG feature stores embeddings in `page_embeddings`. `docker-compose.yml` uses `pgvector/pgvector:pg18` for this reason; the stock `postgres` image will fail the `CREATE EXTENSION vector` migration.
- **Redis** backs caching, the BullMQ queues, the WebSocket Socket.IO adapter, and collaboration sync.

### The two AI subsystems (the main fork additions)
1. **Embedded MCP server** (`integrations/mcp/` + `packages/mcp`). The standalone `@docmost/mcp` server (38 agent-native tools: per-block patch/insert/delete by id, scripted `(doc)=>doc` transforms with dry-run diff, table editing, version diff/restore, comments, images, shares) is bundled and served over HTTP at `/mcp`. It writes through Docmost's real-time-collaboration layer so concurrent human edits aren't clobbered. It authenticates as a service account configured via `MCP_DOCMOST_EMAIL` / `MCP_DOCMOST_PASSWORD`; an admin enables it with a workspace toggle (Workspace settings → AI). Optionally protected by `MCP_TOKEN`.
2. **AI agent chat** (`core/ai-chat/` server + `apps/client/src/features/ai-chat/` client). A built-in agent over the wiki using the Vercel **AI SDK** (`ai`, `@ai-sdk/*`) against any OpenAI-compatible provider configured per workspace (`integrations/ai/` — credentials encrypted at rest via `integrations/crypto`, stored in `ai_provider_credentials`). Key pieces:
   - `core/ai-chat/tools/` — the agent's ~40 read+write tools. Every tool runs under the **calling user's** CASL permissions via a per-user loopback access token (`docmost-client.loader.ts`), so the agent can never exceed what the user could do. Only **reversible** operations are exposed (page history + trash; no permanent delete). Agent edits get an "AI agent" provenance badge in page history (`20260616T130000-agent-provenance` migration).
   - `core/ai-chat/embedding/` — RAG indexer + a BullMQ consumer on `AI_QUEUE` that embeds pages into `page_embeddings` (vector search), complementing Postgres full-text search. Pages are (re)indexed on edit; `AI_EMBEDDING_TIMEOUT_MS` bounds a hung embeddings endpoint.
   - `core/ai-chat/external-mcp/` — admins can attach external MCP servers (e.g. Tavily) to give the agent web access. **`ssrf-guard.ts` validates outbound MCP URLs against SSRF** — keep that guard in the path when touching external-MCP connection logic.

### Client structure
Vite SPA. Code is organized by feature under `apps/client/src/features/*` (mirrors the server domains: `page`, `space`, `comment`, `ai-chat`, `editor`, …). Conventions:
- **TanStack Query** for server state (one `queries/` file per feature), **Jotai** atoms for local/shared UI state, **Mantine 8** + CSS modules (`*.module.css`) + `postcss-preset-mantine` for UI.
- The editor is Tiptap; shared node/mark extensions live in `packages/editor-ext` and are imported by **both the client and the server** (collaboration, import/export) — editor schema changes often need to be made in `editor-ext`, not just the client. Note `packages/mcp` does *not* depend on `editor-ext`; it carries its own mirrored copy of the schema, so keep the two in sync manually when the document schema changes.
- API access goes through `apps/client/src/lib/api-client.ts` (axios). The `@` alias maps to `apps/client/src`.
- Runtime config is injected at build time by `vite.config.ts` via `define` (`APP_URL`, `COLLAB_URL`, `APP_VERSION`, …) — these come from the root `.env`, not from `import.meta.env`.

## Conventions

- **Code comments must be in English.**
- The version string shown in the UI comes from `APP_VERSION` (CI/Docker) or `git describe --tags --always` (local), resolved in `vite.config.ts` — not from `package.json`.
- Server TS config is permissive (`noImplicitAny: false`, `strictNullChecks: false`, `no-explicit-any` lint disabled). Follow the existing relaxed style rather than tightening types broadly.
- Dependency versions are heavily pinned via `pnpm.overrides` and `pnpm.patchedDependencies` (`scimmy`, `yjs`) in the root `package.json`. Don't bump pinned/patched deps casually; the patches and overrides exist for compatibility/security reasons.

## CI / release

- `.github/workflows/develop.yml` — on push to `main`, builds and pushes `ghcr.io/vvzvlad/gitmost:develop`.
- `.github/workflows/release.yml` — on `v*` tags (or manual dispatch), builds multi-arch (amd64 + arm64) images, pushes a manifest list to GHCR (`latest` + semver tags), and creates a draft GitHub Release with image tarballs. Uses the built-in `GITHUB_TOKEN` (not Docker Hub).
- The `Dockerfile` is a multi-stage pnpm build; `APP_VERSION` is passed as a build arg because `.git` isn't in the build context.

## Planning docs

`docs/*.md` hold design plans for in-progress / planned features (mobile app, offline sync, RAG improvements, voice dictation, arbitrary HTML embed). `docs/backlog/*.md` track known issues / follow-ups (e.g. AI-chat review follow-ups). Consult the relevant plan before working on one of those areas.