feat(chunking): inline chunk text editing

Closes #89

CHANGELOG.md

@@ -4,6 +4,16 @@ All notable changes to Docling Studio will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/), and this project adheres to [Semantic Versioning](https://semver.org/).
 
+## [0.4.0] - Unreleased
+
+### Added
+
+- Inline chunk text editing: double-click or edit button to modify chunk text, with save/cancel and "modified" badge
+
+### Fixed
+
+### Changed
+
 ## [0.3.1] - 2026-04-09
 
 ### Added

document-parser/api/analyses.py

@@ -13,6 +13,7 @@ from api.schemas import (
     ChunkResponse,
     CreateAnalysisRequest,
     RechunkRequest,
+    UpdateChunkTextRequest,
 )
 from services.analysis_service import AnalysisService
 
@@ -110,6 +111,28 @@ async def rechunk_analysis(
     ]
 
 
+@router.patch("/{job_id}/chunks/{chunk_index}", response_model=list[ChunkResponse])
+async def update_chunk_text(
+    job_id: str, chunk_index: int, body: UpdateChunkTextRequest, service: ServiceDep
+) -> list[ChunkResponse]:
+    """Update the text of a single chunk by index."""
+    try:
+        chunks = await service.update_chunk_text(job_id, chunk_index, body.text)
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e)) from e
+    return [
+        ChunkResponse(
+            text=c["text"],
+            headings=c.get("headings", []),
+            source_page=c.get("sourcePage"),
+            token_count=c.get("tokenCount", 0),
+            bboxes=[ChunkBboxResponse(page=b["page"], bbox=b["bbox"]) for b in c.get("bboxes", [])],
+            modified=c.get("modified", False),
+        )
+        for c in chunks
+    ]
+
+
 @router.delete("/{job_id}", status_code=204)
 async def delete_analysis(job_id: str, service: ServiceDep) -> None:
     """Delete an analysis job."""

document-parser/api/schemas.py

@@ -158,6 +158,11 @@ class ChunkResponse(_CamelModel):
     source_page: int | None = None
     token_count: int = 0
     bboxes: list[ChunkBboxResponse] = []
+    modified: bool = False
+
+
+class UpdateChunkTextRequest(BaseModel):
+    text: str
 
 
 class CreateAnalysisRequest(BaseModel):

document-parser/services/analysis_service.py

@@ -160,6 +160,28 @@ class AnalysisService:
 
         return chunks
 
+    async def update_chunk_text(self, job_id: str, chunk_index: int, text: str) -> list[dict]:
+        """Update the text of a single chunk by index. Returns the full updated chunks list."""
+        job = await self._analysis_repo.find_by_id(job_id)
+        if not job:
+            raise ValueError(f"Analysis not found: {job_id}")
+        if job.status != AnalysisStatus.COMPLETED:
+            raise ValueError(f"Analysis is not completed: {job_id}")
+        if not job.chunks_json:
+            raise ValueError(f"No chunks available: {job_id}")
+
+        chunks = json.loads(job.chunks_json)
+        if chunk_index < 0 or chunk_index >= len(chunks):
+            raise ValueError(f"Chunk index out of range: {chunk_index}")
+
+        chunks[chunk_index]["text"] = text
+        chunks[chunk_index]["modified"] = True
+
+        chunks_json = json.dumps(chunks)
+        await self._analysis_repo.update_chunks(job_id, chunks_json)
+
+        return chunks
+
     async def _run_batched_conversion(
         self,
         job_id: str,

document-parser/tests/test_analysis_service.py

@@ -4,10 +4,12 @@ from __future__ import annotations
 
 import asyncio
 import functools
+import json
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 
+from domain.models import AnalysisStatus
 from domain.services import extract_html_body, merge_results
 from domain.value_objects import ConversionResult, PageDetail
 from services.analysis_service import AnalysisConfig, AnalysisService, _count_pdf_pages
@@ -515,3 +517,80 @@ class TestBatchedConversion:
         assert result is None
         # Only first batch should have been converted
         assert converter.convert.call_count == 1
+
+
+class TestUpdateChunkText:
+    """Tests for AnalysisService.update_chunk_text."""
+
+    @pytest.mark.asyncio
+    async def test_update_chunk_text_success(self):
+        chunks = [
+            {"text": "original", "headings": [], "sourcePage": 1, "tokenCount": 5, "bboxes": []},
+            {"text": "second", "headings": [], "sourcePage": 2, "tokenCount": 3, "bboxes": []},
+        ]
+        job = MagicMock()
+        job.status = AnalysisStatus.COMPLETED
+        job.chunks_json = json.dumps(chunks)
+
+        repo = MagicMock()
+        repo.find_by_id = AsyncMock(return_value=job)
+        repo.update_chunks = AsyncMock(return_value=True)
+
+        service = _make_service(analysis_repo=repo)
+        result = await service.update_chunk_text("j1", 0, "updated text")
+
+        assert result[0]["text"] == "updated text"
+        assert result[0]["modified"] is True
+        assert result[1]["text"] == "second"
+        assert result[1].get("modified", False) is False
+        repo.update_chunks.assert_called_once()
+
+    @pytest.mark.asyncio
+    async def test_update_chunk_text_not_found(self):
+        repo = MagicMock()
+        repo.find_by_id = AsyncMock(return_value=None)
+        service = _make_service(analysis_repo=repo)
+
+        with pytest.raises(ValueError, match="Analysis not found"):
+            await service.update_chunk_text("missing", 0, "text")
+
+    @pytest.mark.asyncio
+    async def test_update_chunk_text_not_completed(self):
+        job = MagicMock()
+        job.status = AnalysisStatus.RUNNING
+
+        repo = MagicMock()
+        repo.find_by_id = AsyncMock(return_value=job)
+        service = _make_service(analysis_repo=repo)
+
+        with pytest.raises(ValueError, match="not completed"):
+            await service.update_chunk_text("j1", 0, "text")
+
+    @pytest.mark.asyncio
+    async def test_update_chunk_text_index_out_of_range(self):
+        chunks = [
+            {"text": "only one", "headings": [], "sourcePage": 1, "tokenCount": 5, "bboxes": []}
+        ]
+        job = MagicMock()
+        job.status = AnalysisStatus.COMPLETED
+        job.chunks_json = json.dumps(chunks)
+
+        repo = MagicMock()
+        repo.find_by_id = AsyncMock(return_value=job)
+        service = _make_service(analysis_repo=repo)
+
+        with pytest.raises(ValueError, match="out of range"):
+            await service.update_chunk_text("j1", 5, "text")
+
+    @pytest.mark.asyncio
+    async def test_update_chunk_text_no_chunks(self):
+        job = MagicMock()
+        job.status = AnalysisStatus.COMPLETED
+        job.chunks_json = None
+
+        repo = MagicMock()
+        repo.find_by_id = AsyncMock(return_value=job)
+        service = _make_service(analysis_repo=repo)
+
+        with pytest.raises(ValueError, match="No chunks available"):
+            await service.update_chunk_text("j1", 0, "text")

document-parser/tests/test_chunking.py

@@ -278,6 +278,70 @@ class TestCreateAnalysisWithChunking:
         assert chunks[0]["text"] == "chunk1"
 
 
+class TestUpdateChunkTextEndpoint:
+    def test_update_chunk_text_success(self, client, mock_analysis_service):
+        updated_chunks = [
+            {
+                "text": "updated text",
+                "headings": ["H1"],
+                "sourcePage": 1,
+                "tokenCount": 10,
+                "bboxes": [],
+                "modified": True,
+            },
+            {
+                "text": "chunk2",
+                "headings": [],
+                "sourcePage": 2,
+                "tokenCount": 20,
+                "bboxes": [],
+                "modified": False,
+            },
+        ]
+        mock_analysis_service.update_chunk_text = AsyncMock(return_value=updated_chunks)
+
+        resp = client.patch(
+            "/api/analyses/j1/chunks/0",
+            json={"text": "updated text"},
+        )
+        assert resp.status_code == 200
+        data = resp.json()
+        assert len(data) == 2
+        assert data[0]["text"] == "updated text"
+        assert data[0]["modified"] is True
+        assert data[1]["modified"] is False
+
+    def test_update_chunk_text_invalid_index(self, client, mock_analysis_service):
+        mock_analysis_service.update_chunk_text = AsyncMock(
+            side_effect=ValueError("Chunk index out of range: 99"),
+        )
+        resp = client.patch(
+            "/api/analyses/j1/chunks/99",
+            json={"text": "new"},
+        )
+        assert resp.status_code == 400
+
+    def test_update_chunk_text_not_completed(self, client, mock_analysis_service):
+        mock_analysis_service.update_chunk_text = AsyncMock(
+            side_effect=ValueError("Analysis is not completed: j1"),
+        )
+        resp = client.patch(
+            "/api/analyses/j1/chunks/0",
+            json={"text": "new"},
+        )
+        assert resp.status_code == 400
+
+    def test_update_chunk_text_not_found(self, client, mock_analysis_service):
+        mock_analysis_service.update_chunk_text = AsyncMock(
+            side_effect=ValueError("Analysis not found: j1"),
+        )
+        resp = client.patch(
+            "/api/analyses/j1/chunks/0",
+            json={"text": "new"},
+        )
+        assert resp.status_code == 400
+
+
 class TestRechunkEndpoint:
     def test_rechunk_success(self, client, mock_analysis_service):
         mock_analysis_service.rechunk = AsyncMock(

frontend/src/features/chunking/api.test.ts

@@ -1,5 +1,5 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest'
-import { rechunkAnalysis } from './api'
+import { rechunkAnalysis, updateChunkText } from './api'
 
 vi.mock('../../shared/api/http', () => ({
   apiFetch: vi.fn(),
@@ -25,4 +25,19 @@ describe('chunking API', () => {
     })
     expect(result).toEqual(chunks)
   })
+
+  it('updateChunkText sends PATCH to chunk endpoint', async () => {
+    const chunks = [
+      { text: 'updated', headings: [], sourcePage: 1, tokenCount: 10, bboxes: [], modified: true },
+    ]
+    apiFetch.mockResolvedValue(chunks)
+
+    const result = await updateChunkText('job-1', 0, 'updated')
+
+    expect(apiFetch).toHaveBeenCalledWith('/api/analyses/job-1/chunks/0', {
+      method: 'PATCH',
+      body: JSON.stringify({ text: 'updated' }),
+    })
+    expect(result).toEqual(chunks)
+  })
 })

frontend/src/features/chunking/api.ts

@@ -7,3 +7,10 @@ export function rechunkAnalysis(jobId: string, chunkingOptions: ChunkingOptions)
     body: JSON.stringify({ chunkingOptions }),
   })
 }
+
+export function updateChunkText(jobId: string, chunkIndex: number, text: string): Promise<Chunk[]> {
+  return apiFetch<Chunk[]>(`/api/analyses/${jobId}/chunks/${chunkIndex}`, {
+    method: 'PATCH',
+    body: JSON.stringify({ text }),
+  })
+}

frontend/src/features/chunking/store.test.ts

@@ -4,6 +4,7 @@ import { useChunkingStore } from './store'
 
 vi.mock('./api', () => ({
   rechunkAnalysis: vi.fn(),
+  updateChunkText: vi.fn(),
 }))
 
 import * as api from './api'
@@ -17,6 +18,7 @@ describe('useChunkingStore', () => {
   it('starts with default state', () => {
     const store = useChunkingStore()
     expect(store.rechunking).toBe(false)
+    expect(store.saving).toBe(false)
     expect(store.error).toBeNull()
   })
 
@@ -62,4 +64,46 @@ describe('useChunkingStore', () => {
     expect(store.rechunking).toBe(false)
     expect(store.error).toBe('fail')
   })
+
+  it('updateChunkText calls API and returns chunks', async () => {
+    const chunks = [
+      { text: 'updated', headings: [], sourcePage: 1, tokenCount: 5, bboxes: [], modified: true },
+    ]
+    vi.mocked(api.updateChunkText).mockResolvedValue(chunks)
+
+    const store = useChunkingStore()
+    const result = await store.updateChunkText('j1', 0, 'updated')
+
+    expect(api.updateChunkText).toHaveBeenCalledWith('j1', 0, 'updated')
+    expect(result).toEqual(chunks)
+    expect(store.saving).toBe(false)
+  })
+
+  it('updateChunkText sets saving during execution', async () => {
+    let resolve: (v: any) => void
+    vi.mocked(api.updateChunkText).mockImplementation(
+      () =>
+        new Promise((r) => {
+          resolve = r
+        }),
+    )
+
+    const store = useChunkingStore()
+    const promise = store.updateChunkText('j1', 0, 'updated')
+
+    expect(store.saving).toBe(true)
+    resolve!([])
+    await promise
+    expect(store.saving).toBe(false)
+  })
+
+  it('updateChunkText handles errors', async () => {
+    vi.mocked(api.updateChunkText).mockRejectedValue(new Error('save failed'))
+    vi.spyOn(console, 'error').mockImplementation(() => {})
+
+    const store = useChunkingStore()
+    await expect(store.updateChunkText('j1', 0, 'text')).rejects.toThrow('save failed')
+    expect(store.saving).toBe(false)
+    expect(store.error).toBe('save failed')
+  })
 })

frontend/src/features/chunking/store.ts

@@ -5,6 +5,7 @@ import * as api from './api'
 
 export const useChunkingStore = defineStore('chunking', () => {
   const rechunking = ref(false)
+  const saving = ref(false)
   const error = ref<string | null>(null)
 
   async function rechunk(jobId: string, chunkingOptions: ChunkingOptions): Promise<Chunk[]> {
@@ -21,5 +22,23 @@ export const useChunkingStore = defineStore('chunking', () => {
     }
   }
 
-  return { rechunking, error, rechunk }
+  async function updateChunkText(
+    jobId: string,
+    chunkIndex: number,
+    text: string,
+  ): Promise<Chunk[]> {
+    saving.value = true
+    error.value = null
+    try {
+      return await api.updateChunkText(jobId, chunkIndex, text)
+    } catch (e) {
+      error.value = (e as Error).message || 'Failed to update chunk'
+      console.error('Failed to update chunk', e)
+      throw e
+    } finally {
+      saving.value = false
+    }
+  }
+
+  return { rechunking, saving, error, rechunk, updateChunkText }
 })

frontend/src/features/chunking/ui/ChunkPanel.vue

@@ -102,11 +102,64 @@
               {{ chunk.tokenCount }} tokens
             </span>
             <span class="chunk-page" v-if="chunk.sourcePage"> p.{{ chunk.sourcePage }} </span>
+            <span v-if="chunk.modified" class="chunk-modified" data-e2e="chunk-modified">
+              {{ t('chunking.modified') }}
+            </span>
+            <button
+              v-if="editingIdx !== globalIndex(localIdx)"
+              class="chunk-edit-icon"
+              data-e2e="chunk-edit-btn"
+              :title="t('chunking.edit')"
+              @click.stop="startEdit(globalIndex(localIdx), chunk.text)"
+            >
+              <svg viewBox="0 0 20 20" fill="currentColor" width="14" height="14">
+                <path
+                  d="M13.586 3.586a2 2 0 112.828 2.828l-.793.793-2.828-2.828.793-.793zM11.379 5.793L3 14.172V17h2.828l8.38-8.379-2.83-2.828z"
+                />
+              </svg>
+            </button>
           </div>
           <div class="chunk-headings" v-if="chunk.headings.length">
             <span class="chunk-heading" v-for="h in chunk.headings" :key="h">{{ h }}</span>
           </div>
-          <div class="chunk-text" data-e2e="chunk-text">{{ chunk.text }}</div>
+
+          <!-- Edit mode -->
+          <div v-if="editingIdx === globalIndex(localIdx)" class="chunk-edit">
+            <textarea
+              ref="editTextarea"
+              class="chunk-edit-textarea"
+              data-e2e="chunk-edit-textarea"
+              v-model="editText"
+              rows="6"
+            />
+            <div class="chunk-edit-actions">
+              <button
+                class="chunk-edit-btn save"
+                data-e2e="chunk-edit-save"
+                :disabled="chunkingStore.saving"
+                @click="saveEdit(globalIndex(localIdx))"
+              >
+                {{ chunkingStore.saving ? t('chunking.saving') : t('chunking.save') }}
+              </button>
+              <button
+                class="chunk-edit-btn cancel"
+                data-e2e="chunk-edit-cancel"
+                @click="cancelEdit"
+              >
+                {{ t('chunking.cancel') }}
+              </button>
+            </div>
+          </div>
+
+          <!-- Read mode -->
+          <div
+            v-else
+            class="chunk-text"
+            data-e2e="chunk-text"
+            @dblclick="startEdit(globalIndex(localIdx), chunk.text)"
+          >
+            {{ chunk.text }}
+          </div>
         </div>
       </div>
     </div>
@@ -177,6 +230,32 @@ function globalIndex(localIdx: number): number {
   return (pagination.page.value - 1) * pagination.pageSize.value + localIdx
 }
 
+const editingIdx = ref(-1)
+const editText = ref('')
+
+function startEdit(idx: number, text: string) {
+  editingIdx.value = idx
+  editText.value = text
+}
+
+function cancelEdit() {
+  editingIdx.value = -1
+  editText.value = ''
+}
+
+async function saveEdit(chunkIndex: number) {
+  if (!props.analysisId) return
+  const allChunks = props.chunks
+  const originalText = allChunks[chunkIndex]?.text
+  if (editText.value === originalText) {
+    cancelEdit()
+    return
+  }
+  await chunkingStore.updateChunkText(props.analysisId, chunkIndex, editText.value)
+  emit('rechunked')
+  cancelEdit()
+}
+
 const hoveredChunkIdx = ref(-1)
 
 function onChunkHover(chunk: Chunk, localIdx: number) {
@@ -425,6 +504,100 @@ async function doRechunk() {
   border-radius: 4px;
 }
 
+.chunk-modified {
+  font-size: 10px;
+  font-weight: 600;
+  color: #f59e0b;
+  background: rgba(245, 158, 11, 0.12);
+  padding: 1px 6px;
+  border-radius: 4px;
+  text-transform: uppercase;
+  letter-spacing: 0.3px;
+}
+
+.chunk-edit-icon {
+  margin-left: auto;
+  background: none;
+  border: none;
+  color: var(--text-secondary);
+  cursor: pointer;
+  padding: 2px;
+  border-radius: 4px;
+  display: flex;
+  align-items: center;
+  opacity: 0;
+  transition: opacity 0.15s;
+}
+
+.chunk-card:hover .chunk-edit-icon {
+  opacity: 1;
+}
+
+.chunk-edit-icon:hover {
+  color: var(--accent);
+  background: var(--bg-tertiary);
+}
+
+.chunk-edit {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.chunk-edit-textarea {
+  width: 100%;
+  font-size: 12px;
+  font-family: inherit;
+  line-height: 1.5;
+  color: var(--text);
+  background: var(--bg);
+  border: 1px solid var(--accent);
+  border-radius: var(--radius-sm, 4px);
+  padding: 8px;
+  resize: vertical;
+  box-sizing: border-box;
+}
+
+.chunk-edit-textarea:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
+}
+
+.chunk-edit-actions {
+  display: flex;
+  gap: 6px;
+  justify-content: flex-end;
+}
+
+.chunk-edit-btn {
+  padding: 4px 12px;
+  border: none;
+  border-radius: var(--radius-sm, 4px);
+  font-size: 12px;
+  font-weight: 500;
+  cursor: pointer;
+}
+
+.chunk-edit-btn.save {
+  background: var(--accent);
+  color: white;
+}
+
+.chunk-edit-btn.save:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.chunk-edit-btn.cancel {
+  background: var(--bg-tertiary);
+  color: var(--text-secondary);
+}
+
+.chunk-edit-btn.cancel:hover {
+  color: var(--text);
+}
+
 .chunk-text {
   font-size: 12px;
   color: var(--text);
@@ -433,6 +606,7 @@ async function doRechunk() {
   word-break: break-word;
   max-height: 120px;
   overflow-y: auto;
+  cursor: text;
 }
 
 .chunk-empty {

frontend/src/shared/i18n.ts

@@ -119,6 +119,11 @@ const messages: Messages = {
     'chunking.chunks': 'chunks',
     'chunking.noChunks': 'Lancez le chunking pour préparer les segments.',
     'chunking.noChunksOnPage': 'Aucun chunk sur cette page.',
+    'chunking.edit': 'Modifier',
+    'chunking.save': 'Enregistrer',
+    'chunking.saving': 'Enregistrement...',
+    'chunking.cancel': 'Annuler',
+    'chunking.modified': 'modifié',
     'chunking.batchNotice':
       'Le chunking n\u2019est pas disponible pour cette analyse. Les documents volumineux trait\u00e9s par batch ne g\u00e9n\u00e8rent pas la structure interne n\u00e9cessaire au d\u00e9coupage.',
 
@@ -245,6 +250,11 @@ const messages: Messages = {
     'chunking.chunks': 'chunks',
     'chunking.noChunks': 'Run chunking to prepare segments.',
     'chunking.noChunksOnPage': 'No chunks on this page.',
+    'chunking.edit': 'Edit',
+    'chunking.save': 'Save',
+    'chunking.saving': 'Saving...',
+    'chunking.cancel': 'Cancel',
+    'chunking.modified': 'modified',
     'chunking.batchNotice':
       'Chunking is not available for this analysis. Large documents processed in batch mode do not generate the internal structure required for chunking.',
 

frontend/src/shared/types.ts

@@ -58,6 +58,7 @@ export interface Chunk {
   sourcePage: number | null
   tokenCount: number
   bboxes: ChunkBbox[]
+  modified?: boolean
 }
 
 export interface PageElement {