[FEATURE]: Collapsible tool output (code/diff/blocks) in TUI #40096

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1. github-actions

   assigned

   kommander

   on Aug 1, 2026
2. github-actions

   added

   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Aug 1, 2026
3. aravasio

   changed the title [-]Collapsible tool output (code/diff/blocks) in TUI[/-] [+][FEATURE]: Collapsible tool output (code/diff/blocks) in TUI[/+] on Aug 1, 2026
4. github-actions

   removed

   needs:complianceThis means the issue will auto-close after 2 hours.This means the issue will auto-close after 2 hours.

   on Aug 1, 2026
5. github-actions commented on Aug 1, 2026

   

   github-actionsBot

   on Aug 1, 2026 – with GitHub Actions

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   Thanks for updating the issue! It now follows the contributing guidelines and the needs:compliance label has been removed. We appreciate you including a working prototype — that's very helpful context.
6. aravasio commented on Aug 1, 2026

   

   aravasio

   on Aug 1, 2026

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   Related existing issues:

   • [FEATURE]: Add keyboard shortcut to toggle tool output Click to expand #14511 — Keyboard shortcut to toggle tool output Click to expand. Requests a keybind to expand/collapse the last tool call.
   • [FEATURE]: Add Native Fold/Collapse and Unfold/Expand Tools for Conversation and Tool Output Spans #15935 — Native Fold/Collapse and Unfold/Expand Tools
   • [FEATURE]: per-tool output visibility #17250 — Per-tool output visibility
   • FEAT: Expandable view for MCP tool params and results (TUI) #9781 — Expandable view for MCP tool params and results

   The approach in this issue (global /collapse toggle + per-block click) is broader than #14511 — it adds a persistent toggle mode (not just last-output), a slash command, and a KV-backed global state. But the core UX overlap is real.

   Happy to consolidate if maintainers prefer one approach over the other.
7. zhiganov commented on Sep 3, 2026

   

   zhiganov

   on Sep 3, 2026

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   A V2-specific case that strengthens this request: the invocation text itself can dominate the screen, even before there is any output.

   Environment:

   • OpenCode V2 v0.0.0-beta-18992
   • Windows
   • TERM=xterm-256color

   Examples from separate routine operations include:

   • A two-file git diff
   • A commit/push/status sequence
   • A generated inline node -e script that compares two OpenAPI specifications

   The generated script is the clearest case. A command shaped like this can wrap across half the viewport by itself:

   node -e "const fs=require('fs'),yaml=require('yaml'); ... [long generated OpenAPI comparison] ..."
   

   This means collapsing or truncating only the tool result is insufficient. The TUI needs to collapse both the invocation and its output.

   A useful compact presentation would be:

   Shell · inspected changes in two files
   Shell · committed and pushed
   Shell · compared two OpenAPI specifications
   

   The full invocation and result could be expanded independently. Errors and permission requests could remain expanded automatically.
8. Nowaker commented on Oct 9, 2026

   

   Nowaker

   on Oct 9, 2026

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   #54039 adds this to the v1 TUI as a tui.json setting rather than a toggle. tool_output.collapse sets how many lines each tool block shows before Click to expand, per group (bash, generic for plugin and MCP tools, write, edit, apply_patch) or per tool name. 0 collapses a block to just its title or command, so every tool call takes one line until clicked, and "never" keeps it fully expanded. Write, edit and patch blocks gain the expand toggle too. There's no slash command or keybind for a global switch.

   { "tool_output": { "collapse": { "bash": 0, "generic": 0, "write": 0, "edit": 0, "apply_patch": 0 } } }

   This comment is AI generated, but under direct supervision and on request of @Nowaker.
9. neriousy

   marked [FEATURE]: Option to hide diffs in TUI output #43739 as a duplicate of this issue on Oct 20, 2026
10. opencodejr commented on Oct 28, 2026

    

    opencodejrBot

    on Oct 28, 2026

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    Thanks for the detailed request and the prototype, @aravasio!

    To restate it: you'd like a global collapse mode for tool blocks (Write, Edit, Shell, generic tools) in the TUI, toggled with a /collapse command or an optional keybind. Each block would shrink to a one-line summary (file name, diff stats or line count), and you could click a block to expand it on top of the global mode.

    For reference, v2 already has some related controls, though none of them collapse every tool block:

    • session.verbosity (low / medium / high), which the Verbosity command cycles through. low summarizes each run of tools and thoughts.
    • session.grouping, which controls grouping of exploration items.
    • Shell output is already cut down to a short preview that you can click to expand.

    Maintainers will look at this request and decide on the direction. Since you offered a PR, it's probably best to wait for their input on the design, for example whether this should go into the existing verbosity setting or be a separate toggle.