diff --git a/AGENTS.md b/AGENTS.md
index 489fd7b..e9bdaaf 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -9,16 +9,17 @@ Canonical Go client for OnlyOffice Workspace (Projects + Calendar + CRM) and the
   - `request.go` — `Request`, `Query`, `Time`, `Token`, `MetaResponse`, `Permissions`.
   - `auth.go` — `Authenticate`, `AuthenticateContext`, `InvalidateToken`, `Auth`, token lifecycle.
   - `http.go` — transport + DRY response decoders (`ResponseArray`/`ResponseObject`/`postFormObject`/`putFormObject`/`deleteObject`).
-  - `projects.go`, `tasks.go`, `users.go`, `calendar.go`, `crm.go`, `files.go`, `mails.go`, `invoices.go` — typed / untyped domain methods. **`files.go`** — CRM opportunity upload plus **project/task Documents**. **`mails.go`** — OnlyOffice Workspace Mail. **`invoices.go`** — CRM invoices, PDF regen/cleanup, status. Association rules: [`docs/crm-associations.md`](docs/crm-associations.md).
+  - `projects.go`, `tasks.go`, `users.go`, `calendar.go`, `crm.go`, `files.go`, `files_webdav.go`, `files_stem.go`, `retry.go`, `mails.go`, `invoices.go` — typed / untyped domain methods. **`files.go`** — CRM opportunity upload plus **project/task Documents** (`UpdateFile`, `UploadToFolderReplacing`). **`files_webdav.go`** — Documents module by id (`ListDavFolder`, `MoveDavItems`/`CopyDavItems` with per-operation error surfacing, `ListFileOps`). **`retry.go`** — `DoRetry`: deterministic linear backoff (no jitter) on 429/502/503/504; every bulk tool routes API calls through it. **`mails.go`** — OnlyOffice Workspace Mail. **`invoices.go`** — CRM invoices, PDF regen/cleanup, status. Association rules: [`docs/crm-associations.md`](docs/crm-associations.md).
   - Pure stdlib + `google/go-querystring`; no UI, no dotenv.
 - **CLI — `cmd/oo/` as `package main`.** Cobra wrapper that loads `.env` via `godotenv` at startup. **Subject-based command tree** mirroring [`tea`](https://gitea.com/gitea/tea):
   - `main.go` — entry point (docstring lists the command tree).
   - `common.go` — `rootCmd`, `newOO`, `printTable`/`printObject`, `--output table|json` flag.
-  - `calendar.go`, `projects.go`, `projects_files.go`, `tasks.go`, `tasks_files.go`, `users.go`, `contacts.go`, `opportunities.go`, `cases.go`, `crm_tasks.go`, `mails.go`, `invoices.go` — one file per subject (or per subject facet), each registers in `init()`.
+  - `calendar.go`, `projects.go`, `projects_files.go`, `tasks.go`, `tasks_files.go`, `users.go`, `contacts.go`, `opportunities.go`, `cases.go`, `crm.go`, `crm_tasks.go`, `catalog.go`, `docs.go`, `dav.go`, `mails.go`, `invoices.go` — one file per subject (or per subject facet), each registers in `init()`. `dav.go` exposes the Documents module by id (`oo dav ls|move|copy|mkdir|rename-file|rename-folder|download|fileops`).
   - CLI-only deps (`spf13/cobra`, `joho/godotenv`) stay out of the library.
 - **TUI — `cmd/office/` as `package main`.** Bubble Tea three-pane browser (module tree, selectable list, markdown preview). Reuses `cmd/internal/bootstrap` for env/auth and the root `onlyoffice` library for all API calls. UI logic in `cmd/office/ui/`; preview/formatting in `cmd/office/preview/`; list loaders in `cmd/office/fetch/`.
   - **List table (`DataTable`)** — `cmd/office/ui/table*.go`. Column layout policies live in `cmd/office/model/table_layout.go` (`TableFlexLayoutFor`); cell rendering uses the bubbles/table inline pattern in `table_render.go` (`renderTableCell`, `padANSIWidth`). See `.cursor/skills/office-tui-table/SKILL.md` before changing center-pane tables.
 - **Shared bootstrap — `cmd/internal/bootstrap/`.** `LoadEnv()` + `NewClient(ctx)` extracted from `oo`; both binaries import it.
+- **Bulk Documents tools — `cmd/ooscan/`, `cmd/pdfamount/`, `cmd/kontoblatt/`, `cmd/kontolink/`.** Single-purpose binaries (folder index, PDF amounts, Kontoblatt summary/linking). Pace requests, route API calls through `DoRetry`; usage in README.
 - **Personal ops tooling** (disk inventory, dossier→CRM sync, SearXNG) lives in private [`eSlider/oo-workspace`](https://git.produktor.io/eSlider/oo-workspace) (`oow`), not in this public tree.
 
 ## Rules
@@ -27,7 +28,7 @@ Canonical Go client for OnlyOffice Workspace (Projects + Calendar + CRM) and the
 - New endpoints go into the library first; CLI commands are thin wrappers.
 - Prefer `ResponseObject` / `postFormObject` / `putFormObject` / `deleteObject` over hand-rolled `json.Unmarshal(responseField(...))` blocks — they exist for DRY, use them.
 - Domain split is by file, **not** by subpackage. Don't introduce `internal/` or `pkg/*` subpackages inside the library — it flattens the `*Client` call surface for a reason.
-- CLI commands follow **subject → verb** structure (`oo <subject> <verb>`), never `oo <verb>-<subject>`. Add new commands to the existing subject file if one fits; create a new `cmd/oo/<subject>.go` for a genuinely new domain.
+- CLI commands follow **subject → verb** structure (`oo <subject> <verb>`), never `oo <verb>-<subject>`. Add new commands to the existing subject file if one fits; create a new `cmd/oo/<subject>.go` for a genuinely new domain. The subject→verb tree in `cmd/oo/main.go` and the README table are documentation — update them with the code.
 - **Documents for agents:** prefer Markdown in git; OnlyOffice UI is weak for `.md`/`.txt`. Use `oo docs put-md` (md→docx) and `oo docs put-txt` (txt→docx, preserves line breaks). All upload paths default to **upsert** by `stem|ext` (`--replace`, default true); `--no-replace` fails on conflict; `--allow-duplicate` opts into raw OO append. `oo projects files dedupe PROJECT_ID` reports/removes duplicate stem|ext copies (`--apply`, `--cross`; includes project root folder).
 - Every table output goes through `printTable(headers, rows)`; every single-object through `printObject(v)`. Do not `fmt.Println` rows ad-hoc or the `--output json` flag breaks for that command.
 - No secrets in the repo; use `.env` (gitignored). Commit `.env.example` only.
diff --git a/README.md b/README.md
index ba1b0b7..50870c4 100644
--- a/README.md
+++ b/README.md
@@ -503,6 +503,29 @@ type Task struct {
 |---|---|
 | `GetUsers()` | List all users with profiles |
 
+### Documents Files
+
+| Method | Description |
+|---|---|
+| `ListDavFolder(ctx, id)` | List a Documents folder (`@root` for virtual sections) |
+| `ListDavSections(ctx)` | Virtual sections (Documents, Projects, …) |
+| `CreateDavFolder(ctx, parentID, title)` | Create a subfolder |
+| `RenameDavFolder(ctx, id, title)` / `RenameDavFile(ctx, id, title)` | Rename folder / file |
+| `DownloadFile(ctx, id, dst)` / `DownloadDavFile(ctx, id, w)` | Download file bytes |
+| `UploadDavFile(ctx, folderID, fileName, src)` | Upload from a reader |
+| `UploadToFolder(ctx, folderID, localPath)` | Upload a local file into a folder |
+| `UploadToFolderReplacing(ctx, folderID, localPath)` | Upsert by `stem\|ext`; returns replaced ids |
+| `UpdateFile(ctx, fileID, localPath)` | New version of an existing file (same id, no copy) |
+| `MoveDavItems(ctx, folderIDs, fileIDs, dest)` | Move (`resolveType=Skip`); per-operation errors surfaced, not silent nil |
+| `CopyDavItems(ctx, folderIDs, fileIDs, dest)` | Copy (`conflictResolveType=Skip`); errors surfaced |
+| `MoveFiles(ctx, destFolderID, fileIDs)` | Move with `resolveType=Skip` + `holdResult`; errors surfaced |
+| `ListFileOps(ctx)` | Active file operations (move/copy status polling) |
+| `FolderFiles(ctx, folderID)` | Flat file list of a folder (stem helpers) |
+| `DeleteFilesByStem(ctx, folderID, stem)` | Remove `stem\|ext` copies |
+| `DoRetry(ctx, policy, fn)` | Deterministic linear backoff (N·Base, no jitter) on 429/502/503/504 |
+| `DefaultRetryPolicy()` | 5 attempts, 1s·2s·3s·4s waits, 30s cap |
+| `Transient(err)` | True for retriable OnlyOffice answers |
+
 ### Helper Types
 
 | Type | Description |
@@ -622,6 +645,8 @@ oo docs convert ./note.docx               # → note.md
 oo docs ocr ./scan.jpg --md ./scan.md     # searchable PDF + markdown
 oo docs hocr ./scan.jpg --lang spa --md ./scan.hocr.md --yaml ./scan.yml
 oo docs put-md 7 ./OO-HONDA-7-INDEX.md --folder 490
+oo docs put-txt 7 ./notes.txt --folder 490
+oo docs put-xlsx 7 ./table.xlsx --folder 490
 oo docs as-md 2815 --to ./parte.md        # download OO file as MD (OCR if needed)
 oo docs as-md 307 --hocr --lang spa       # OO download via go-hocr structure
 oo projects files put-md 7 ./note.md      # alias
@@ -631,21 +656,64 @@ oo tasks files upload 208 ./notes.pdf
 oo tasks files detach 208 12345
 ```
 
+### Documents module (`oo dav`)
+
+Direct access to the Documents module by folder/file id — the same calls that
+back `oo-webdav` and the project/task file commands. `move` sends
+`resolveType=Skip` + `holdResult=true`: without those params the legacy
+`fileops/move` endpoint answers 200 without moving anything, and the library
+surfaces such per-operation errors instead of a silent nil
+(`MoveDavItems` / `CopyDavItems` / `MoveFiles`).
+
+```bash
+oo dav ls 659
+oo dav ls @root                       # virtual sections (Documents, Projects, …)
+oo dav mkdir 659 "2026 inbox"
+oo dav move 659 22881 22882           # DEST_FOLDER_ID FILE_ID…
+oo dav move 659 22881 --folders 670   # move folders along with files
+oo dav copy 659 22881
+oo dav rename-file 22881 invoice-v2.pdf
+oo dav rename-folder 671 o2-archive
+oo dav download 22881 --to ./copy.pdf # default path: ./<server title>
+oo dav fileops                        # active move/copy operations (status polling)
+```
+
+### Bulk tools (`cmd/`)
+
+Small single-purpose binaries for bulk Documents work. All of them pace
+requests and retry transient OnlyOffice answers (429/502/503/504) with a
+deterministic linear backoff — no jitter, same waits on every run
+(see `DoRetry` below). Build with `go build ./cmd/<tool>`.
+
+```bash
+ooscan 659                             # recursive index → TSV: file_id, folder_id, path, title
+ooscan 659 666 > oo-index.tsv          # several roots into one index
+pdfamount 671                          # "Zu zahlender Betrag" per PDF → TSV: file_id, title, amount
+kontoblatt 3906 ./kontoblatt.xlsx      # summary (Gegenkonto/Monat) uploaded next to source
+kontolink IN.xlsx oo-index.tsv OUT.xlsx [FILE_ID] [AMOUNTS_TSV]
+# kontolink writes DocEditor links into the Link column: Beleg → supplier+month
+# → amount+date (5th arg = pdfamount output); with FILE_ID it updates the
+# source file in place, else uploads an "(links)" copy next to it.
+```
+
 | Subject | Verbs |
 |---|---|
 | `calendar` | `list`, `events`, `add`, `delete` |
-| `projects` | `list`, `get`, `milestones`, `create`, `update`, `delete`, **`files`** (`list`, `upload`, `download`, `rename`, `delete`) |
+| `projects` | `list`, `get`, `milestones`, `milestone-create`, `create`, `update`, `delete`, `contacts` (`add`, `remove`), `link-authors`, `link-git`, **`files`** (`list`, `upload`, `download`, `rename`, `delete`, `dedupe`, `as-md`, `put-md`, `put-txt`, `put-xlsx`) |
 | `tasks` | `list`, `get`, `create`, `update`, `delete`, `subtask add`, **`files`** (`list`, `upload`, `detach`) |
 | `users` | `list`, `self` (alias: `oo whoami`) |
-| `contacts` | `list`, `get`, `delete`, `info-add`, `merge`, `dedupe-info` |
+| `contacts` | `list`, `get`, `delete`, `info-add`, `merge`, `dedupe-info`, `tags`, `tag-add`, `tag-create`, `tag-remove` |
 | `persons` | `list`, `create`, `delete`, `dedupe` |
 | `companies` | `list`, `create`, `delete`, `dedupe`, `dedupe-persons` |
-| `opportunities` | `list`, `get`, `create`, `delete`, `stages`, `member-add`, `dedupe`, `dedupe-members`, `fix-titles` |
+| `opportunities` | `list`, `get`, `create`, `update`, `delete`, `stages`, `member-add`, `dedupe`, `dedupe-members`, `fix-titles` |
 | `invoices` | `list`, `get`, `create`, `update`, `pdf`, `pdf-cleanup`, `status`, `delete`, `items …` |
 | `crm` | `cleanup` |
-| `mails` | `accounts`, `folders`, `list`, `get`, `draft`, `attach`, `draft-invoice`, `delete` |
+| `mails` | `accounts`, `folders`, `list`, `get`, `download-attachment`, `draft`, `attach`, `draft-invoice`, `send`, `delete` |
 | `cases` | `list`, `create`, `delete`, `member-add` |
-| `crm-tasks` | `list`, `create`, `delete`, `categories` |
+| `crm-tasks` | `list`, `create`, `delete`, `categories`, `reassign-self` |
+| `docs` | `tools`, `convert`, `optimize`, `ocr`, `hocr`, `as-md`, `put-md`, `put-txt`, `put-xlsx` |
+| `catalog` | `match`, `merge`, `apply`, `scan-contacts`, `scan-projects`, `scan-thunderbird` |
+| `dav` | `ls`, `move`, `copy`, `mkdir`, `rename-file`, `rename-folder`, `download`, `fileops` |
 
 The CLI reads only `.env` from the current working directory (godotenv is a
 CLI-only concern — the library itself never loads dotfiles).
diff --git a/cmd/oo/main.go b/cmd/oo/main.go
index 7422a2d..c91baaa 100644
--- a/cmd/oo/main.go
+++ b/cmd/oo/main.go
@@ -3,19 +3,20 @@
 // Command tree is subject-based (mirrors the library split and the `tea` CLI):
 //
 //	oo calendar      list | events | add | delete
-//	oo projects      list | get | milestones | create | update | delete | files (list|upload|download|rename|delete|as-md|put-md)
+//	oo projects      list | get | milestones | milestone-create | create | update | delete | contacts (add|remove) | link-authors | link-git | files (list|upload|download|rename|delete|dedupe|as-md|put-md|put-txt|put-xlsx)
 //	oo tasks         list | get | create | update | delete | subtask add | files (list|upload|detach)
 //	oo users         list | self            (alias: oo whoami)
-//	oo contacts      list | get | delete | info-add | merge | dedupe-info
+//	oo contacts      list | get | delete | info-add | merge | dedupe-info | tags | tag-add | tag-create | tag-remove
 //	oo persons       list | create | delete | dedupe
 //	oo companies     list | create | delete | dedupe | dedupe-persons
-//	oo opportunities list | get | create | delete | stages | member-add | dedupe | dedupe-members | fix-titles
+//	oo opportunities list | get | create | update | delete | stages | member-add | dedupe | dedupe-members | fix-titles
 //	oo cases         list | create | delete | member-add
-//	oo crm-tasks     list | create | delete | categories
+//	oo crm-tasks     list | create | delete | categories | reassign-self
 //	oo crm           cleanup
-//	oo mails         accounts | folders | list | get | download-attachment | draft | attach | draft-invoice | delete
+//	oo mails         accounts | folders | list | get | download-attachment | draft | attach | draft-invoice | send | delete
 //	oo invoices      list | get | create | update | pdf | pdf-cleanup | status | delete | items …
-//	oo docs          tools | convert | ocr | as-md | put-md
+//	oo docs          tools | convert | optimize | ocr | hocr | as-md | put-md | put-txt | put-xlsx
+//	oo catalog       match | merge | apply | scan-contacts | scan-projects | scan-thunderbird
 //	oo dav           ls | move | copy | mkdir | rename-file | rename-folder | download | fileops
 //
 // CRM association rules: docs/crm-associations.md