fix: render think tags as reasoning blocks + fix MCP MaxListeners overflow#21873
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saurav-shakya wants to merge 1 commit intoanomalyco:devfrom
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fix: render think tags as reasoning blocks + fix MCP MaxListeners overflow#21873saurav-shakya wants to merge 1 commit intoanomalyco:devfrom
saurav-shakya wants to merge 1 commit intoanomalyco:devfrom
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…rflow Two fixes in this commit: ### 1. Render <think> tags as reasoning blocks at display layer Models like GLM-5 embed reasoning in raw <think>...</think> tags within text parts. Previously these were displayed as raw HTML to the user. **Approach:** Parse and render <think> / <thinking> tags at the display layer (TUI, Web UI, CLI) rather than stripping them from the message storage. This preserves the full model output for multi-turn context while giving users clean, styled reasoning blocks. **Changes:** - packages/util/src/think.ts -- Shared utility: stripThinkTags(), splitThinkBlocks() with regex matching both <think> and <thinking> variants - packages/opencode/src/util/format.ts -- Same utilities for the core package - packages/opencode/src/cli/cmd/tui/routes/session/index.tsx -- TextPart renders think blocks with dim/italic/bordered styling matching ReasoningPart - packages/ui/src/components/message-part.tsx -- TextPartDisplay renders think blocks in <div data-component="reasoning-part"> - packages/opencode/src/cli/cmd/run.ts -- CLI strips think tags from output, shows reasoning with --thinking flag ### 2. Fix MCP MaxListeners overflow with many servers When 7+ stdio-based MCP servers are configured, the default Node.js EventEmitter limit of ~10 is exceeded. Each StdioClientTransport spawns a child process and adds listeners to its stdin/stdout/stderr pipes. The MCP protocol layer also sends many concurrent requests (getPrompt, listTools, etc.) that each add a 'drain' listener. **Fix:** Dynamically calculate the needed listener limit based on the number of configured local MCP servers and increase both EventEmitter.defaultMaxListeners and process stream limits before connecting. **Changes:** - packages/opencode/src/mcp/index.ts -- Count local MCP servers, set EventEmitter.defaultMaxListeners and process stream limits proportionally ## Related Issues - Fixes anomalyco#16903 (GLM-5 thinking output pollution) - Fixes anomalyco#11439 (think tag rendering regression from removal of extractReasoningMiddleware) - Related: anomalyco#4033, anomalyco#7779
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The following comment was made by an LLM, it may be inaccurate: Potential duplicate found:
This PR appears to address the same two fixes: rendering |
Contributor
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Thanks for updating your PR! It now meets our contributing guidelines. 👍 |
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This was referenced Apr 15, 2026
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Issue for this PR
Closes #16903
Type of change
What does this PR do?
GLM-5 model pollutes context window with broken thinking output. Raw
<think>tags leak into the UI as garbled?characters, breaking TUI layout and status indicators.Think-tag fix:
splitThinkBlocks()/stripThinkTags()utilities inpackages/util/src/think.tsandpackages/opencode/src/util/format.tsTextPartnow extracts reasoning and renders it as a dimmed/bordered block (only when thinking display is enabled)TextPartDisplayrenders extracted reasoning in areasoning-partdivrun.tsstrips think tags from output; shows reasoning with--thinkingflagMCP MaxListeners fix (related):
EventEmitterlimit of 10 is easily exceededEventEmitter.defaultMaxListeners+ per-stream limits before connectingHow did you verify your code works?
Tested locally with GLM-5 model. Verified
<think>tags no longer leak into TUI/web rendered output and reasoning blocks display correctly. MCP fix verified with multiple local MCP servers — no more MaxListeners warnings.Screenshots / recordings
N/A — TUI text rendering change; reasoning blocks render with dim/italic styling behind a left border.
Checklist