Remove textual conflict marker support, consolidate to semantic resolution only

[Copilot]

Removes all textual and HTML conflict marker detection/resolution code. Extension now exclusively handles semantic conflicts via Git staging areas (UU status).

Changes

Core detection and resolution (~1000 lines removed)

• conflictDetector.ts: Removed HTML pattern matching, inline marker parsing, cell-level conflict detection
• resolver.ts: Removed resolveTextualConflicts(), applyTextualResolutions(), hasTextualConflicts() methods
• gitIntegration.ts: Simplified isSemanticConflict() to only check UU status

Type system cleanup

• types.ts: Removed hasTextualConflicts field from NotebookSemanticConflict
• web/webTypes.ts: Removed WebTextualConflict, WebCellConflict interfaces
• Changed all type: 'textual' | 'semantic' unions to type: 'semantic'

UI simplification

• extension.ts: Removed textual conflict UI path in quick-pick menu
• web/client/ConflictResolver.tsx: Removed buildMergeRowsFromTextual() function
• web/WebConflictPanel.ts: Removed textual conflict rendering logic

Documentation

• AGENTS.md: Removed references to 04_Cascadia.ipynb and simple-textual-conflict.ipynb test cases
• simulate_merge_uu.sh: Removed -textual flag documentation

All semantic conflict functionality (cell matching, three-way merge, auto-resolution) remains unchanged.

Original prompt

Remove, one at a time, all mention and code regarding textual (this is what we mostly called it)/html conflicts.

I was trying to keep up with nbdime putting in conflict markers <<<<<<, but now I don't care much.

It'll be all over the codebase, you must remove it from EVERYWHERE. Make sure to run npm run compile at the end to verify it compiles.

You don't need to touch #file:ConflictResolverPanel.ts because it's an old artifact we're keeping as reference. Check everywhere else (including #file:simulate_merge_uu.sh #file:AGENTS.md and such

[Chronological Review: The conversation began with the user requesting the removal of all mentions and code regarding textual/html conflicts from the codebase. The user specified that they no longer wanted to maintain conflict markers and requested a thorough search across various files, explicitly excluding the file ConflictResolverPanel.ts. The user also emphasized the need to run npm run compile to verify the changes after the removals.]

[Intent Mapping: The user explicitly requested, "Remove, one at a time, all mention and code regarding textual (this is what we mostly called it)/html conflicts." They also stated, "Make sure to run npm run compile at the end to verify it compiles," indicating a need for code integrity post-modification.]

[Technical Inventory: The conversation involved the following technical components:

• Repository: MergeNB
• Current branch: web
• Default branch: main
• Files mentioned for modification: AGENTS.md, simulate_merge_uu.sh, and ConflictResolverPanel.ts (to be excluded from changes).]

[Code Archaeology: The user is focused on removing conflict markers and related code from multiple files, particularly AGENTS.md and simulate_merge_uu.sh, while ensuring that the changes do not affect the old artifact file, ConflictResolverPanel.ts.]

[Progress Assessment: The user has not yet begun the removal process, as they are still in the initial request phase. The next steps involve identifying and removing the specified code from the mentioned files.]

[Context Validation: All necessary context for continuation is captured, including the specific files to modify and the user's intent to verify the code's functionality post-removal.]

[Recent Commands Analysis: The last agent command was the user request to remove conflict-related code from the codebase. There were no tool results to summarize as the command was a directive rather than an execution of a tool.]

1. Conversation Overview: - Primary Objectives: The user requested to "Remove, one at a time, all mention and code regarding textual (this is what we mostly called it)/html conflicts" from the codebase and to "Make sure to run npm run compile at the end to verify it compiles." - Session Context: The conversation has focused on the user's directive to clean up the codebase by removing specific conflict markers and related code, with a clear emphasis on maintaining code integrity through compilation checks. - User Intent Evolution: The user has shifted from initially trying to manage conflict markers to a more decisive stance of removing them entirely.

2. Technical Foundation:

• Repository: MergeNB
• Current branch: web
• Default branch: main

3. Codebase Status:

• File Name: AGENTS.md
  • Purpose: Contains agent-related documentation and code.
  • Current State: Awaiting modifications to remove conflict markers.
• File Name: simulate_merge_uu.sh
  • Purpose: Script related to simulating merge scenarios.
  • Current State: Needs review for conflict-related code removal.
• File Name: ConflictResolverPanel.ts
  • Purpose: An old artifact kept for reference.
  • Current State: No changes required.

4. Problem Resolution:

• Issues Encountered: The presence of conflict markers and related code throughout the codebase.
• Solutions Implemented: None yet; the user has outlined a plan for removal.

5. Progress Tracking:

• Completed Tasks: None; the user has just initiated the request for code removal.
• Partially Complete Work: The process of identifying and removing conflict-related code is pending.
• Validated Outcomes: None yet; verification through compilation is planned post-removal.

6. Active Work State:

• Current Focus: The user is preparing to remove conflict-related code from the codebase.
• Recent Context: The user has reiterated the need to check multiple files for conflict markers and to run a compilation check afterward.
• Working Code: No specific code snippets have been modified yet.
• Immediate Context: The user is about to start the removal process as per their last request.

7. Recent Operations:

• Last Agent Commands: The user requested the removal of conflict-related code from the codebase.
• Tool Results Summary: No tool results to summarize as the command was a directive.
• Pre-Summary State: The agent was actively preparing to execute the user's request for code removal.
• Operation Context: The user aims to clean up the codebase by removin...

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[Avni2000]

@coderabbitai can you see if there's anything else the AI missed? Project compiles, runs, and resolves correctly (manually) though.

[coderabbitai]

Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

@Avni2000: I'll do a thorough sweep of the codebase to check for any remaining references to textual/HTML conflict functionality that should have been removed.

---

🏁 Script executed:

#!/bin/bash

echo "=== Searching for 'textual' (case-insensitive) ==="
rg -i 'textual' --type ts --type tsx --type md --type sh -C 2

echo -e "\n=== Searching for 'html.*conflict' or 'conflict.*html' (case-insensitive) ==="
rg -iP '(html.*conflict|conflict.*html)' --type ts --type tsx --type md --type sh -C 2

echo -e "\n=== Searching for 'hasTextualConflicts' ==="
rg 'hasTextualConflicts' --type ts --type tsx -C 2

echo -e "\n=== Searching for 'WebTextualConflict' ==="
rg 'WebTextualConflict' --type ts --type tsx -C 2

echo -e "\n=== Searching for 'WebCellConflict' ==="
rg 'WebCellConflict' --type ts --type tsx -C 2

echo -e "\n=== Searching for 'buildMergeRowsFromTextual' ==="
rg 'buildMergeRowsFromTextual' --type ts --type tsx -C 2

echo -e "\n=== Searching for 'resolveTextualConflicts' ==="
rg 'resolveTextualConflicts' --type ts --type tsx -C 2

echo -e "\n=== Searching for 'applyTextualResolutions' ==="
rg 'applyTextualResolutions' --type ts --type tsx -C 2

echo -e "\n=== Searching for conflict marker patterns '<<<<<<', '>>>>>>>' ==="
rg -F '<<<<<<' --type ts --type tsx --type md --type sh -C 2
rg -F '>>>>>>>' --type ts --type tsx --type md --type sh -C 2

echo -e "\n=== Searching for 'analyzeRawConflicts' ==="
rg 'analyzeRawConflicts' --type ts --type tsx -C 2

echo -e "\n=== Searching for comment references to textual resolution ==="
rg -i 'textual.*resolution|resolution.*textual' --type ts --type tsx -C 2

Length of output: 921

---

🏁 Script executed:

#!/bin/bash

echo "=== Searching for 'textual' (case-insensitive) ==="
rg -i 'textual' -g '*.ts' -g '*.tsx' -g '*.md' -g '*.sh' -C 2

echo -e "\n=== Searching for 'html.*conflict' or 'conflict.*html' (case-insensitive) ==="
rg -iP '(html.*conflict|conflict.*html)' -g '*.ts' -g '*.tsx' -g '*.md' -g '*.sh' -C 2

echo -e "\n=== Searching for 'hasTextualConflicts' ==="
rg 'hasTextualConflicts' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for 'WebTextualConflict' ==="
rg 'WebTextualConflict' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for 'WebCellConflict' ==="
rg 'WebCellConflict' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for 'buildMergeRowsFromTextual' ==="
rg 'buildMergeRowsFromTextual' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for 'resolveTextualConflicts' ==="
rg 'resolveTextualConflicts' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for 'applyTextualResolutions' ==="
rg 'applyTextualResolutions' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for conflict marker patterns '<<<<<<', '>>>>>>>' ==="
rg -F '<<<<<<' -g '*.ts' -g '*.tsx' -g '*.md' -g '*.sh' -C 2

echo -e "\n=== Searching for 'analyzeRawConflicts' ==="
rg 'analyzeRawConflicts' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Searching for comment references to textual resolution ==="
rg -i 'textual.*resolution|resolution.*textual' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Checking for 'inline.*marker' or 'marker.*inline' ==="
rg -iP '(inline.*marker|marker.*inline)' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Checking for 'cell.*conflict' in comments or strings ==="
rg -i 'cell.*level.*conflict' -g '*.ts' -g '*.tsx' -C 2

Length of output: 25749

---

🏁 Script executed:

#!/bin/bash

echo "=== Checking if ConflictMarker interface is used anywhere ==="
rg '\bConflictMarker\b' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Checking for imports of ConflictMarker ==="
rg 'import.*ConflictMarker' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Checking types.ts for other potential textual conflict related types ==="
cat src/types.ts | grep -A 5 -B 5 -i "conflict\|marker\|textual"

echo -e "\n=== Checking for NotebookConflict type usage (used for textual conflicts) ==="
rg '\bNotebookConflict\b' -g '*.ts' -g '*.tsx' --files-with-matches | grep -v ConflictResolverPanel.ts

echo -e "\n=== Checking for CellConflict type usage ==="
rg '\bCellConflict\b' -g '*.ts' -g '*.tsx' -C 2 | head -50

echo -e "\n=== Checking for MetadataConflict type usage ==="
rg '\bMetadataConflict\b' -g '*.ts' -g '*.tsx' -C 2 | head -50

Length of output: 7548

---

🏁 Script executed:

#!/bin/bash

echo "=== Reading src/web/client/types.ts ==="
cat src/web/client/types.ts

echo -e "\n=== Checking for ConflictResolution usage ==="
rg '\bConflictResolution\b' -g '*.ts' -g '*.tsx' -C 2 | head -50

echo -e "\n=== Checking for any remaining union types with 'textual' ==="
rg "type:.*['\"]textual['\"]|['\"]textual['\"].*type" -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Checking for ResolutionChoice usage ==="
rg '\bResolutionChoice\b' -g '*.ts' -g '*.tsx' --files-with-matches | grep -v ConflictResolverPanel.ts

echo -e "\n=== Looking for any notebook conflict detection or parsing code ==="
rg 'parseNotebookConflict|detectConflict.*Marker|findConflict.*Marker' -g '*.ts' -g '*.tsx' -C 2

Length of output: 4840

---

🏁 Script executed:

#!/bin/bash

echo "=== Checking if NotebookConflict is used in WebConflictPanel.ts ==="
rg '\bNotebookConflict\b' src/web/WebConflictPanel.ts -C 3

echo -e "\n=== Checking if NotebookConflict is used in resolver.ts ==="
rg '\bNotebookConflict\b' src/resolver.ts -C 3

echo -e "\n=== Checking if CellConflict is actually imported/used anywhere (excluding ConflictResolverPanel) ==="
rg 'import.*CellConflict' -g '*.ts' -g '*.tsx' | grep -v ConflictResolverPanel

echo -e "\n=== Checking if ConflictResolution is actually used anywhere ==="
rg 'import.*ConflictResolution|: ConflictResolution' -g '*.ts' -g '*.tsx' -C 2

echo -e "\n=== Reading the header comment in types.ts to check for outdated references ==="
head -20 src/types.ts

echo -e "\n=== Checking test files for any textual conflict references ==="
fd -e test.ts -e spec.ts -x rg -l 'textual|NotebookConflict|CellConflict' {}

echo -e "\n=== Checking README or docs for textual conflict mentions ==="
rg -i 'textual.*conflict|html.*conflict' -g '*.md' -C 2 | grep -v ConflictResolverPanel

Length of output: 1189

---

🏁 Script executed:

#!/bin/bash

echo "=== Checking what imports from src/web/client/types.ts ==="
rg "from ['\"].*web/client/types|from ['\"]\\./types" src/web/client/ -C 2

echo -e "\n=== Checking what is actually imported from types.ts (textual conflict related) ==="
rg "import.*\{[^}]*(ConflictMarker|CellConflict|NotebookConflict|ConflictResolution)" -g '*.ts' -g '*.tsx' -C 1 | grep -v ConflictResolverPanel

echo -e "\n=== Summary: List all type definitions in types.ts ==="
grep "^export interface\|^export type" src/types.ts

echo -e "\n=== Summary: List all exports in web/client/types.ts ==="
grep "export" src/web/client/types.ts | head -30

Length of output: 3011

---

@Avni2000: Great job on the refactor! I found a few remaining textual conflict references that can be cleaned up:

1. Orphaned Type Definitions in src/types.ts

These types are only used by the excluded ConflictResolverPanel.ts and should be removed:

Lines to remove:

• ConflictMarker interface (lines ~50-55)
• CellConflict interface (lines ~57-68)
• NotebookConflict interface (lines ~70-90)
• ConflictResolution interface (lines ~104-108)

Header comment to update (line ~7):

// Current:
 * - Conflict marker types: ConflictMarker, CellConflict, NotebookConflict

// Should be removed or changed to:
 * - Semantic conflict types: SemanticConflict, SemanticConflictType, CellMapping

2. Unused Exports in src/web/client/types.ts

Remove from the re-export list (lines ~10-11):

    CellConflict,
    NotebookConflict,

These are exported but never actually imported by any active code.

---

3. Obsolete Learnings

Two learnings in the knowledge base reference removed textual conflict functionality and should be deleted:

• ID: a67d0dc6-4c8a-45dc-bc77-182d5f2a5fcc - References HTML-styled conflict marker detection
• ID: d3f04b86-b2d3-4eb6-97fa-5fe66a09ddcc - References analyzeRawConflicts() function

Would you like me to remove these obsolete learnings?

---

Everything else looks clean! The project correctly compiles and runs because these orphaned types aren't causing any issues—they're just unused code that can be safely removed. 🐰

---

⛔ Learnings removed

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/conflictDetector.ts : Detect and handle HTML-styled conflict markers (e.g., `<span><<<<<<< current</span>`) in cell source code, which are valid JSON but indicate cell conflicts

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/conflictDetector.ts : Use `analyzeRawConflicts()` to detect and handle raw merge conflict markers (`<<<<<<<`/`>>>>>>>`) that break JSON parsing in `.ipynb` files

---

🧠 Learnings used

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/conflictDetector.ts : Implement semantic conflict detection for Git `UU` status notebooks that lack textual markers but have different execution states, outputs, or cell modifications between branches

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/conflictDetector.ts : Detect and handle HTML-styled conflict markers (e.g., `<span><<<<<<< current</span>`) in cell source code, which are valid JSON but indicate cell conflicts

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/resolver.ts : Use the `merge-nb.findConflicts` command as the single unified entry point to find notebooks with merge conflicts (both textual and semantic) and bring up the conflict resolution panel

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/webview/**/*.{ts,tsx} : Provide a unified conflict resolution UI in `ConflictResolverPanel` webview supporting both textual and semantic conflict resolution with 3-way diff view

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/conflictDetector.ts : Use `analyzeRawConflicts()` to detect and handle raw merge conflict markers (`<<<<<<<`/`>>>>>>>`) that break JSON parsing in `.ipynb` files

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to **/*.{ts,tsx} : Ensure resolved output from merge conflict resolution is valid `.ipynb` JSON with proper cell structure and notebook format compliance

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/**/gitIntegration.ts : Retrieve base/current/incoming notebook versions from Git staging areas and detect `UU` (unmerged/unmerged) status in `gitIntegration.ts`

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to **/*.{ts,tsx} : Handle Git-nullified execution counts after merge conflict resolution by optionally restoring or renumbering them

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to **/*.{ts,tsx} : Always parse raw JSON when analyzing Jupyter notebook files, as merge conflicts may appear in `cells[].source`, `cells[].outputs`, or `metadata` fields, not just in code

---

Learnt from: CR
Repo: Avni2000/MergeNB PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-01-28T22:06:05.265Z
Learning: Applies to src/webview/**/*.{ts,tsx} : Use cell-level diffing to show side-by-side or inline diffs for conflicting cells rather than raw JSON line-by-line diffs

[Avni2000]

Nope, that's fine.