# 2479 2026 02 17 Thinking Delta Tui Integration 09df255d

> Thinking delta TUI integration (core routing, panel wiring, commands, tests)

- Skill: `tools-only/2479-2026-02-17-thinking-delta-tui-integration-09df255d` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add tools-only/2479-2026-02-17-thinking-delta-tui-integration-09df255d`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tools-only/2479-2026-02-17-thinking-delta-tui-integration-09df255d/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: tools-only (https://skillmd.com/u/tools-only)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/tools-only/2479-2026-02-17-thinking-delta-tui-integration-09df255d

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# Thinking delta TUI integration (core routing, panel wiring, commands, tests)

## Summary

Implemented end-to-end thinking stream integration for TunaCode TUI:

- Core now routes `thinking_delta` independently of `text_delta`
- UI now has a dedicated muted `#thinking-output` panel with throttled updates and bounded buffering
- `/thoughts` command toggles reasoning display on/off
- Final assistant response extraction now includes assistant `text` blocks only
- Added unit tests for core routing, thinking renderer behavior, and latest response extraction semantics

## Files changed

- `src/tunacode/core/agents/main.py`
- `src/tunacode/ui/renderers/thinking.py` (new)
- `src/tunacode/ui/styles/layout.tcss`
- `src/tunacode/ui/app.py`
- `src/tunacode/ui/commands/thoughts.py` (new)
- `src/tunacode/ui/commands/__init__.py`
- `tests/unit/core/test_thinking_stream_routing.py` (new)
- `tests/unit/ui/test_thinking_renderer.py` (new)
- `tests/unit/ui/test_app_latest_response_text.py` (new)

## Validation

- `uv run ruff check src/tunacode/core/agents/main.py src/tunacode/ui/app.py src/tunacode/ui/commands src/tunacode/ui/renderers/thinking.py` ✅
- `uv run pytest tests/unit/core/test_thinking_stream_routing.py tests/unit/ui/test_thinking_renderer.py tests/unit/ui/test_app_latest_response_text.py tests/unit/ui/test_command_contracts.py -q` ✅
- `uv run ruff check --fix .` ✅
- `uv run pytest` ⚠️ Fails in vendored `tinyAgent/tests/*` collection due import module resolution (`ModuleNotFoundError: No module named 'tests....'`)