PR #60547: fix(webchat): strip raw <tool_call> and <function_calls> XML from chat bubbles [AI-assisted]

• Repository: openclaw/openclaw
• Author: Dharit13
• State: open | merged: False
• Link: https://github.com/openclaw/openclaw/pull/60547

Description (problem / solution / changelog)

Summary

WebChat renders raw <tool_call> and <function_calls> XML tags visibly in chat bubbles when models emit tool calls as text instead of structured blocks. This is a regression in v2026.4.2 (worked in v2026.3.31).

Telegram and other channels are unaffected because the server-side pipeline already strips these, but the WebChat UI rendering path (stripAssistantInternalScaffolding in assistant-visible-text.ts) did not handle these tag families.

What this PR does

Adds stripGenericToolCallXml to the shared assistant-visible-text stripping pipeline. The function:

• Strips <tool_call>...</tool_call> blocks (exact pattern from reporter's logs)
• Strips <function_calls>...</function_calls> and <function_call>...</function_call> blocks
• Strips stray/unpaired tags
• Preserves tags inside code fences and inline code

What this PR does NOT do

The reporter also mentions "NEXUS frequently stops responding mid-task after tool calls." That is a separate tool execution pipeline issue, not a display bug, and should be tracked independently.

This PR also does not address the root cause of why tool calls end up as XML text in the assistant message content. It adds defense-in-depth stripping on the display path, consistent with how the server-side pipeline already handles similar leaks (Minimax, model special tokens, downgraded tool calls).

Files changed

Test plan

• pnpm build passes
• pnpm test passes (11,059 passed, 0 failed)
• pnpm check has a pre-existing tsgo failure in src/channels/plugins/status.ts (verified identical on clean main)
• Tested against exact strings from reporter's logs — all <tool_call> blocks stripped, natural language preserved
• Verified code-fence and inline-code preservation
• No CODEOWNERS-restricted files touched
• Verify fixed behavior in a running WebChat instance (cannot reproduce locally — no running OpenClaw gateway available)

AI disclosure

• AI-assisted (Claude, via Cursor)
• Degree of testing: fully tested — pnpm build, pnpm test (11,059/11,059), exact reporter log verification
• I understand what the code does
• No Codex access — could not run codex review --base origin/main

Closes #60494

Made with Cursor

Changed files

• src/shared/text/assistant-visible-text.test.ts (modified, +23/-0)
• src/shared/text/assistant-visible-text.ts (modified, +3/-1)
• src/shared/text/tool-call-tags.test.ts (added, +108/-0)
• src/shared/text/tool-call-tags.ts (added, +61/-0)

PR #60619: fix(outbound): strip leaked <tool_call> XML tags from chat bubbles

• Repository: openclaw/openclaw
• Author: oliviareid-svg
• State: closed | merged: True
• Link: https://github.com/openclaw/openclaw/pull/60619

Description (problem / solution / changelog)

Summary

Since v2026.4.2, WebChat renders raw <tool_call> and <function_calls> XML tags in chat bubbles when the model emits them as plain text. Telegram is unaffected because it uses a different delivery pipeline.

Root cause: stripAssistantInternalScaffolding() only strips <thinking> and <relevant_memories> tags — it does not handle tool-call XML tags that models sometimes leak into text content.

Fix: Add stripToolCallXmlTags() to the sanitization pipeline in assistant-visible-text.ts:

• Strips full blocks: <tool_call>...</tool_call>, <function_calls>...</function_calls>
• Strips lone opening/closing tags
• Also integrates stripModelSpecialTokens() for <|...|> style markers

This fixes all channels at once since they all flow through stripAssistantInternalScaffolding().

Fixes #60494

Test plan

• Verify <tool_call> XML tags no longer appear in WebChat bubbles
• Verify <function_calls> blocks are stripped
• Verify normal text and code blocks are preserved
• Run existing assistant-visible-text.test.ts tests

🤖 Generated with Claude Code

Changed files

• CHANGELOG.md (modified, +1/-22)
• src/shared/text/assistant-visible-text.test.ts (modified, +268/-0)
• src/shared/text/assistant-visible-text.ts (modified, +242/-1)
• src/shared/text/model-special-tokens.ts (added, +47/-0)