[ryanwyler]

Summary

Keeps tool output compact and accessible with click-to-expand functionality. Tool blocks with more than 15 lines collapse by default, showing a preview with a "+N" indicator. Click anywhere on the tool block to expand/collapse, making it easier to navigate long sessions without pages of output scrolling by.

Fixes #7450
Relates to #1816

Also helps with:

• [FEATURE]: Tool output preview #5358 - Collapsible outputs improve tool output visibility
• [FEATURE]: Better utilization of screen real estate #5419 - Less scrolling through verbose output improves screen real estate usage
• [FEATURE]: Add hints toggle to declutter UI #6240 - Same goal of reducing visual clutter
• [FEATURE]: Condensed diff #3521 - Diffs are collapsed by default
• [FEATURE]: Very little place for agent answer on a small screen #5277 - Collapsed outputs save space on small screens

Compliments commit: b3a2f9fb4

Features

• Tool outputs collapse when exceeding configured line threshold
• Click anywhere on tool block to expand/collapse
• Shows "+N" indicator for hidden lines
• Configurable threshold via tui.dynamic_details_max_lines (default: 15)
• Configurable arrow indicators via tui.dynamic_details_show_arrows (default: true)
• Toggle via Ctrl+P -> "Enable/Disable dynamic details"
• Persisted preference in KV store (default: enabled)

Configuration

{
  "tui": {
    "dynamic_details_max_lines": 15,
    "dynamic_details_show_arrows": true
  }
}

Applies To

Block-container tools (bash, write, edit, patch) when:

• Output exceeds configured line threshold
• Tool has completed (not pending/running states)

TodoWrite is excluded (always expanded) for visibility.

Implementation

Enhances the existing BlockTool component with collapse/expand logic rather than introducing new abstractions. Uses:

• Data-based line counting for collapse decisions (stable, based on tool output)
• Visual line counting via virtualLineCount for accurate "+N" display
• maxHeight + overflow: hidden for clipping when collapsed

Changes

• packages/opencode/src/cli/cmd/tui/routes/session/index.tsx - Add dynamicDetails context, toggle command, and collapse logic in BlockTool
• packages/opencode/src/config/config.ts - Add config options for max lines and arrow indicators

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

No duplicate PRs found

[ryanwyler]

[github-actions]

Thanks for your contribution!

This PR doesn't have a linked issue. All PRs must reference an existing issue.

Please:

1. Open an issue describing the bug/feature (if one doesn't exist)
2. Add Fixes #<number> or Closes #<number> to this PR description

See CONTRIBUTING.md for details.

[ryanwyler]

Closing to re-open from the correct fork (gignit/opencode -> anomalyco/opencode). Will resubmit shortly.