feat: rename search_and_replace tool to edit and unify edit-family UI

[hannesrudolph]

Summary

Replaces the search_and_replace tool with a new edit tool that uses a flat, single-operation parameter model (file_path, old_string, new_string, replace_all), replacing the old batch operations array. Keeps search_and_replace as a backward-compatible alias so models that reference it (e.g. MiniMax via includedTools) continue to work without changes. Unifies the chat UI rendering for all edit-family tool events.

Behavioral note: The old search_and_replace accepted an array of operations per call (with partial-success semantics). The new edit tool handles exactly one replacement per invocation, enforces uniqueness by default, and rejects no-op edits where old_string === new_string.

Changes

• New edit tool definition (src/core/prompts/tools/native-tools/edit.ts) with file_path, old_string, new_string, replace_all parameters
• New EditTool execution handler (src/core/tools/EditTool.ts) with replace_all support, uniqueness checking, and identical-string guard
• Alias system: Added search_and_replace: "edit" to TOOL_ALIASES — models with includedTools: ["search_and_replace"] get the edit tool renamed as search_and_replace
• Parser updates: NativeToolCallParser.ts handles both "edit" and "search_and_replace" tool names with the new parameter structure
• Execution routing: presentAssistantMessage.ts routes both tool names to EditTool
• Alias resolution in validation: isToolAllowedForMode now resolves aliases when checking customTools and toolRequirements, ensuring search_and_replace in includedTools correctly maps to edit
• Backward compat wrapper: SearchAndReplaceTool.ts reduced to a 2-line re-export from EditTool
• Types: Added "edit" to toolNames, "replace_all" to toolParamNames, updated NativeToolArgs for both edit and search_and_replace
• Removed legacy XML tool markup detection: The containsXmlToolMarkup() guardrail in presentAssistantMessage.ts has been removed — it was a leftover from the XML-to-native tool calling migration that added maintenance burden (short tool names like "edit" caused false positives on words like <editor>) without meaningful benefit since all tool calling is now native
• Unified chat UI: All edit-family tool events (editedExistingFile, appliedDiff, newFileCreated, searchAndReplace, search_and_replace, search_replace, edit, edit_file, apply_patch, apply_diff) render through a single branch in ChatRow.tsx with consistent diff icon, header text, and batch-diff support
• apply_patch partial preview fix: Partial approval rows now extract a deterministic non-empty path from patch headers, falling back to the workspace basename — eliminates blank initial approval rows during streaming

Test Results

• 7 targeted test files: 105/105 passing
• Full src/ suite: 341 passed (29 pre-existing failures from missing @ai-sdk/amazon-bedrock — unrelated)
• packages/types: 170/170 passing

Test details

• 16 new EditTool tests covering basic replacement, replace_all, uniqueness errors, no-match errors, identical-string guard, missing params, approval flow, partial blocks, error recovery, and file tracking
• searchAndReplaceTool.spec.ts reduced to alias verification (searchAndReplaceTool === editTool)
• New applyPatchTool.partial.spec.ts for partial path extraction (header parsing, multi-file determinism, truncated-header stability, fallback, outside-workspace detection)
• ChatRow.diff-actions.spec.tsx rewritten to verify unified edit rendering, jump-to-file for newFileCreated, protected/outside-workspace messaging, and batch diff handling
• CI stability: deterministic timestamps in HistoryPreview.spec.tsx, increased cache-clear timeout in custom-tool-registry.spec.ts

---

Important

Introduces a new edit tool to replace search_and_replace, unifies edit-related UI, and updates tests for backward compatibility.

• Behavior:
  • Introduces edit tool with parameters file_path, old_string, new_string, replace_all.
  • edit tool replaces search_and_replace, which remains as an alias for backward compatibility.
  • Enforces uniqueness by default and rejects no-op edits.
• UI:
  • Unifies chat UI for edit-related tools in ChatRow.tsx.
  • Consistent rendering for editedExistingFile, appliedDiff, newFileCreated, searchAndReplace, edit, etc.
• Code Changes:
  • Adds EditTool in EditTool.ts.
  • Removes legacy XML tool markup detection in presentAssistantMessage.ts.
  • Updates NativeToolCallParser.ts to handle edit and search_and_replace with new parameters.
  • Updates validateToolUse to resolve tool aliases.
• Testing:
  • Adds tests for EditTool in editTool.spec.ts.
  • Updates ChatRow.diff-actions.spec.tsx to verify unified edit rendering.
  • Ensures backward compatibility with searchAndReplaceTool.spec.ts.

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[roomote]

Rooviewer   See task

All previously flagged issues are now resolved. No new issues in latest commit.

• Delete orphaned src/core/prompts/tools/native-tools/search_and_replace.ts (old parameter schema, no longer imported)
• containsXmlToolMarkup false-positive risk: "edit" in the tool-name list matches <editor>, <editable>, etc. after lowercasing -- fixed with hasTagReference boundary checking
• Unified edit-family branch in ChatRow.tsx drops the onJumpToFile prop that newFileCreated previously passed to CodeAccordian -- fixed with onJumpToCreatedFile memo
• EditTool.ts: String.prototype.replace() interprets special $-patterns ($$, $&, $`, $') in the replacement string -- fixed with function replacer () => normalizedNew

Previous reviews

• 5fba8c6: Review #1
• fa239a0: Review #2
• 6b7b715: Review #3
• 876ae99: Review #4
• e1a149c: Review #5
• d172b5e: Review #6
• 793be28: Review #7
• 09a6b8a: Review #8
• 285a161: Review #9
• 52ad6f3: Review #10
• d3365ea: Review #11
• d7d8dce: Review #12
• 6495ef3: Review #13
• 0a1377c: Review #14
• 01335c6: Review #15

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