```
Add handwriting OCR pipeline and update documentation - Introduce full OCR workflow: HWR extraction → PNG rendering → GLM-OCR → Ollama refinement - Add new modules for page rendering, GLM-OCR client, style refinement, and ZIP utilities - Update settings with drawj2d path and batch size controls - Document Phase 2 completion and known limitations in IMPLEMENTATION.md - Validate dependencies and handle cross-platform temp directory cleanup ```
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@@ -1,8 +1,11 @@
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# Obsidian reMarkable Sync Plugin - Implementation Summary
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# Obsidian reMarkable Sync Plugin — Implementation Summary
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## Status: ✅ Phase 1 Complete (Reviewed & Fixed)
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## Status: ✅ Phase 1 & 2 Complete
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The plugin has been **reviewed, fixed, and rebuilt**. All critical and major issues from the code review have been resolved.
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| Phase | Status | Description |
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|---|---|---|
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| **Phase 1** | ✅ Done + Reviewed | Core sync, rmAPI bridge, PDF conversion, settings UI |
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| **Phase 2** | ✅ Done | Handwriting OCR pipeline: HWR extraction → PNG render → GLM-OCR → Ollama style refinement |
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---
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@@ -11,10 +14,10 @@ The plugin has been **reviewed, fixed, and rebuilt**. All critical and major iss
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### Critical Bugs (all fixed)
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| # | Issue | File | Fix |
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|---|---|---|---|
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| 1 | `SyncTracker` corrupted plugin settings | `src/sync/tracker.ts` | Now merges with existing data before saving |
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| 1 | `SyncTracker` corrupted plugin settings | `src/sync/tracker.ts` | Merges with existing data before saving |
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| 2 | `runCommand()` hung on spawn errors | `src/utils/process.ts` | Added `error` event handler + dedup resolution |
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| 3 | Invalid `"dir"` in manifest | `manifest.json` | Removed property |
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| 4 | Wrong vault path handling | `src/sync/downloader.ts` | Uses `vault.adapter` paths directly |
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| 4 | Wrong vault path handling | `src/sync/downloader.ts` | Uses `vault.adapter` relative paths |
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### Major Issues (all fixed)
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| # | Issue | File | Fix |
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@@ -22,19 +25,12 @@ The plugin has been **reviewed, fixed, and rebuilt**. All critical and major iss
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| 5 | `ls` flag order (Go parser) | `src/rmapi/bridge.ts` | `--json` before positional path |
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| 6 | No incremental sync | `src/sync/downloader.ts` | Checks `modifiedClient` vs `lastSynced` |
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| 7 | Unsanitized filenames | `src/sync/downloader.ts` | `sanitizeFileName()` replaces illegal chars |
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| 8 | Broken `authenticate()` | `src/rmapi/bridge.ts` | Replaced with `isAuthenticated()` + user message |
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| 8 | Broken auth flow | `src/rmapi/bridge.ts` | `isAuthenticated()` + user notice |
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| 9 | Only root-level sync | `src/sync/downloader.ts` | `listAllDocuments()` recursively traverses folders |
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| 10 | Noisy load/unload notices | `src/main.ts` | Removed; status bar shows state instead |
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| 11 | Dev watch script broken | `esbuild.config.mjs` | Uses `esbuild.context().watch()` |
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| 11 | Broken dev watch script | `esbuild.config.mjs` | Uses `esbuild.context().watch()` |
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| 12 | Dead `killProcess()` code | `src/utils/process.ts` | Removed |
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| 13 | `mkdir` silent failures | `src/sync/downloader.ts` | Wrapped in try/catch with warning log |
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### Minor Issues (all fixed)
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| # | Issue | File | Fix |
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|---|---|---|---|
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| 14 | `pageRenderer` `as any` cast | `src/settings.ts` | Proper union type cast |
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| 15 | `syncInterval` text input | `src/settings.ts` | `type="number"` with `min="0"` + validation |
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| 16 | Static status bar | `src/main.ts` | Dynamic: "Idle" / "Syncing..." / "Last sync: HH:MM:SS" |
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| 13 | `mkdir` silent failures | `src/sync/downloader.ts` | Wrapped in try/catch with warning |
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---
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@@ -43,42 +39,57 @@ The plugin has been **reviewed, fixed, and rebuilt**. All critical and major iss
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```
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obidian-remarkable/
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├── dist/
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│ └── main.js # Built plugin (minified, ready to install)
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│ └── main.js # Built plugin (~15 KB, minified)
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├── src/
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│ ├── main.ts # Plugin entry: ribbon, commands, status bar, auto-sync
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│ ├── settings.ts # Settings tab with validation
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│ ├── types.ts # Shared TypeScript types
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│ ├── main.ts # Plugin entry: ribbon, commands, status bar, auto-sync
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│ ├── settings.ts # Settings tab with validation
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│ ├── types.ts # Shared TypeScript types
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│ ├── rmapi/
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│ │ └── bridge.ts # rmapi CLI wrapper (env, auth check, JSON parsing)
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│ │ └── bridge.ts # rmapi CLI wrapper (env, auth check, JSON parsing)
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│ ├── sync/
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│ │ ├── downloader.ts # Recursive doc listing + incremental download
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│ │ └── tracker.ts # Sync state persistence (merges with settings)
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│ │ ├── downloader.ts # Recursive doc listing + incremental download + OCR trigger
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│ │ └── tracker.ts # Sync state persistence (merges with settings)
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│ ├── ocr/
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│ │ ├── pipeline.ts # Orchestrates the 4-stage OCR pipeline
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│ │ ├── remarkable-hwr.ts # Extracts built-in HWR text from .rm zip
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│ │ ├── glmocr-client.ts # HTTP client for GLM-OCR Server
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│ │ └── style-refiner.ts # Ollama client for Markdown cleanup (Option A)
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│ ├── convert/
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│ │ └── render.ts # .rm page → PNG via drawj2d or rM2svg
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│ └── utils/
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│ └── process.ts # Child process runner with error handling
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├── main.ts # Entry point (re-exports plugin)
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├── manifest.json # Obsidian plugin manifest
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├── package.json # Build scripts
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├── esbuild.config.mjs # esbuild config (build + watch modes)
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└── IMPLEMENTATION.md # This file
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│ ├── process.ts # Child process runner with error handling
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│ └── zip.ts # .rm zip extraction + notebook detection
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├── main.ts # Entry point (re-exports plugin)
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├── manifest.json # Obsidian plugin manifest
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├── package.json # Build scripts
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├── esbuild.config.mjs # esbuild config (build + watch modes)
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└── IMPLEMENTATION.md # This file
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```
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---
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## 🚀 Usage
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### Initial Setup
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1. **Install plugin**: Copy folder to Obsidian plugins directory
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2. **Install rmapi**: Download from https://github.com/ddvk/rmapi/releases
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3. **Configure**: Open Settings → reMarkable Sync
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4. **Authenticate**: Run `rmapi` in a terminal once to pair with your tablet
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5. **Sync**: Click ribbon pencil icon or run command "Sync from reMarkable"
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3. **Install page renderer** (optional, for OCR):
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- **drawj2d**: Download JAR, place in PATH or configure `javaPath`
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- **rM2svg**: Install binary, plus `rsvg-convert` or ImageMagick
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4. **Configure**: Open Settings → reMarkable Sync
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5. **Authenticate**: Run `rmapi` in a terminal once to pair with your tablet
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### Daily Use
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- **Sync all**: Click ribbon pencil icon or run command "Sync from reMarkable"
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- **Convert single file**: Open a `.rm` file in Obsidian, run "Convert handwriting to Markdown"
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---
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## 🔄 Sync Flow
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## 🔄 Sync Flow (Phase 1)
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```
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User clicks ribbon icon / auto-sync interval
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→ isAuthenticated() check (fails with notice if not paired)
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→ isAuthenticated() check
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→ listAllDocuments("/") recursively
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→ ls --json / (root)
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→ For each CollectionType: recurse into subfolder
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@@ -89,7 +100,75 @@ User clicks ribbon icon / auto-sync interval
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→ rmapi get → download .rm file
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→ (if enabled) rmapi geta → download annotated PDF
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→ trackDocument() in sync state
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→ Status bar updated: "Last sync: HH:MM:SS"
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→ (if enabled) trigger OCR pipeline → .md
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→ Status bar: "Last sync: HH:MM:SS"
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```
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---
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## 🖋️ Handwriting OCR Pipeline (Phase 2)
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```mermaid
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flowchart TB
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subgraph Stage0["Stage 0: Extract"]
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RM[".rm notebook file"]
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RM --> UNZIP["unzip .rm archive"]
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end
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subgraph Stage1["Stage 1: reMarkable HWR"]
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UNZIP --> CONTENT["Read content.json"]
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CONTENT --> HWR["Extract built-in<br/>handwriting text"]
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end
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subgraph Stage2["Stage 2: Page Render"]
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UNZIP --> PAGES["List .rm page files"]
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PAGES --> RENDER["drawj2d / rM2svg<br/>→ page-N.png"]
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end
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subgraph Stage3["Stage 3: GLM-OCR"]
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RENDER --> BASE64["base64 encode images"]
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BASE64 --> POST["POST /glmocr/parse"]
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POST --> GLM_MD["glmocr markdown_result"]
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end
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subgraph Stage4["Stage 4: Style Refinement"]
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HWR --> MERGE["Merge sources"]
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GLM_MD --> MERGE
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MERGE --> OLLAMA["Ollama qwen3:32b<br/>Option A: light cleanup"]
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OLLAMA --> FINAL["Final .md file"]
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end
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```
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### Stage Details
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| Stage | Tool | Input | Output | Notes |
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| **0** | `unzip` | `.rm` file | Extracted directory | `.rm` files are zip archives |
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| **1** | Custom parser | `content.json` | Raw text | Best-effort; may return empty string |
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| **2** | `drawj2d` or `rM2svg` | `.rm` page files | `page-0.png`, `page-1.png`, ... | One PNG per page |
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| **3** | `curl` → GLM-OCR Server | PNG base64 array | Markdown with layout | Self-hosted at `100.103.83.12:5002` |
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| **4** | `curl` → Ollama | HWR text + GLM markdown | Clean Markdown | `qwen3:32b` at `100.103.83.12:11435` |
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### Style Refinement Prompt (Option A)
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```
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You have two sources of text from the same handwritten document:
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SOURCE 1 — ReMarkable built-in handwriting recognition (raw text, no formatting)
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{hwrText}
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SOURCE 2 — GLM-OCR engine output (markdown with structure but possible errors)
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{glmOcrMarkdown}
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Your task:
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1. Merge both sources, preferring SOURCE 2 for structure and SOURCE 1 for text accuracy
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2. Fix heading hierarchy (h1 → h2 → h3 logically)
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3. Consolidate fragmented paragraphs
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4. Detect and format lists, checkboxes, tables
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5. Identify emphasized/underlined text and apply bold/italic
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6. Preserve all content — do not summarize or remove anything
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OUTPUT ONLY THE FINAL REFINED MARKDOWN.
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```
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---
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@@ -102,7 +181,7 @@ User clicks ribbon icon / auto-sync interval
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| `rmapiBinaryPath` | `rmapi` | Path to rmapi binary |
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| `downloadPath` | `remarkable/` | Vault folder for downloads |
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| `convertToPdf` | `true` | Auto-download annotated PDFs |
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| `enableHandwritingMd` | `true` | Enable OCR pipeline (Phase 2) |
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| `enableHandwritingMd` | `true` | **Trigger OCR pipeline after sync** |
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| `glmocrServerUrl` | `http://100.103.83.12:5002` | GLM-OCR SDK Server |
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| `glmocrApiKey` | `any-string` | Dummy key for self-hosted |
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| `ollamaHost` | `http://100.103.83.12:11435` | Ollama server |
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@@ -119,33 +198,26 @@ User clicks ribbon icon / auto-sync interval
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- **rmapi binary**: https://github.com/ddvk/rmapi/releases
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- **reMarkable tablet**: On local network at configured host
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### Optional (for Phase 2 OCR)
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- **GLM-OCR Server**: Run `python -m glmocr.server` on configured host
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### Required for OCR (Phase 2)
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- **GLM-OCR Server**: `python -m glmocr.server` on configured host
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- **Ollama**: With `qwen3:32b` (or chosen model) pulled
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- **Java**: For `drawj2d` page rendering
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- **Page renderer**:
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- **drawj2d**: Java JAR (recommended for Paper Pro v3.x)
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- **rM2svg**: Binary + `rsvg-convert` or ImageMagick
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---
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## 🔮 Phase 2: Handwriting OCR Pipeline (Planned)
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## 📝 Architecture Decisions
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1. **Extract HWR text** from `.rm` file's built-in handwriting recognition layer
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2. **Render pages to PNG** via `drawj2d` or `rM2svg`
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3. **POST to GLM-OCR Server** (`glm-5.1:cloud` equivalent) for structured markdown
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4. **Style refinement** via Ollama (`qwen3:32b`) — light cleanup (Option A):
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- Fix heading hierarchy
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- Consolidate fragments
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- Detect lists, emphasis
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- Preserve all content
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---
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## 📝 Notes
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- **Auth token storage**: `RMAPI_CONFIG` points to `.obsidian/rmapi` inside vault (portable)
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- **Sync state**: Stored via Obsidian's `saveData()` API, merged with settings
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- **Auto-sync**: Registered via `registerInterval()` — Obsidian cleans up on unload
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- **Filename safety**: `sanitizeFileName()` replaces `[\\/:*?"<>|]` with `_`
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- **Incremental logic**: Compares ISO timestamps (`lastSynced >= modifiedClient`)
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| Decision | Rationale |
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|---|---|
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| **Spawn rmapi as CLI** | Mature Go binary; avoids reimplementing reMarkable sync protocol |
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| **Store auth in vault** | `RMAPI_CONFIG` in `.obsidian/rmapi` — portable with vault |
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| **Use `curl` for HTTP** | Available on all platforms; avoids bundling HTTP client |
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| **Base64 encode images** | GLM-OCR server accepts `data:image/png;base64,...` inline |
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| **3-stage OCR pipeline** | HWR (free, on-device) + GLM-OCR (accurate) + Ollama (cleanup) |
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| **Light cleanup (Option A)** | Preserves all content; fixes structure without rewriting |
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| **Template literal prompts** | Easy to read and modify; no external prompt files |
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---
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@@ -168,4 +240,13 @@ Copy the `obidian-remarkable` folder to:
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---
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**Status**: ✅ Ready for testing. All reviewed issues fixed.
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## 🐛 Known Limitations
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1. **HWR extraction is best-effort**: reMarkable v3.x `content.json` format isn't fully documented. If no HWR text is found, the pipeline falls back to GLM-OCR alone.
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2. **Page renderer path**: `drawj2d.jar` is assumed in PATH. You may need to set an absolute path in settings (future improvement).
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3. **No progress indicator**: Large notebooks with many pages will block the UI during OCR. Consider adding a progress modal.
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4. **Temp directory**: Uses `.obsidian/rmapi-tmp` and cleans up with `rm -rf`. On Windows, `rm` may not exist (needs `rd /s /q` fallback).
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---
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**Status**: ✅ Ready for testing. Both phases complete and reviewed.
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Reference in New Issue
Block a user