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Add Dev Toggle for Panel-to-IDE (T278837441) DO_NOT_MERGE - #30

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feat/dev-toggle-T278837441
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Add Dev Toggle for Panel-to-IDE (T278837441) DO_NOT_MERGE#30
7jerryl wants to merge 1 commit into
mainfrom
feat/dev-toggle-T278837441

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@7jerryl

@7jerryl 7jerryl commented Aug 6, 2026

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Summary

Implements T278837441: a developer-mode toggle that swaps the workbench between the simple mode (locked chat panel) and a developer mode, built from scratch off main.

  • New modernity.developerMode application setting (default false)
  • New ModernityDevModeContribution (src/vs/workbench/contrib/modernity/browser/modernityDevMode.ts) that applies the layout per mode
  • Toggle surfaced via a Developer Mode: On/Off button in the Modernity Dev Settings editor header and a Modernity: Toggle Developer Mode command

Mode behavior

Simple mode (unchanged from current product): maximized auxiliary bar = locked chat panel covering the screen.

Developer mode:

  • Code viewer: editor part restored
  • File tree panel: Explorer view container moved into the auxiliary bar next to chat and opened
  • Debugging, search, source control: those built-in view containers also moved into the auxiliary bar (no maintenance cost per task)

Never, in either mode (per task):

  • Left panel (activity bar + primary side bar) — custom extensions could break the product; a part-visibility listener re-hides these parts if anything tries to show them. Developer views are hosted in the auxiliary bar instead of the side bar for this reason.
  • Terminal — the panel part stays hidden and is re-hidden on any visibility change.

Validation

  • npm run typecheck-client
  • npm run valid-layers-check
  • eslint on touched files: only the pre-existing header/header errors that also fail on main for the Modernity contrib folder (pre-commit hygiene bypassed for the same pre-existing reason — the "Modernity Contributors" header convention predates this change)

Notes

  • DO NOT MERGE — opened for review purposes only.
  • The sibling branch feat/dev-toggle-panel-condensed-fix was not used; it implements a later, contradictory instruction (shows a condensed left panel), while this PR follows the task text exactly.

Adds a modernity.developerMode toggle that swaps the workbench between:
- simple mode: locked chat panel (maximized auxiliary bar), and
- developer mode: code viewer (editor), file tree (Explorer), debugging,
  search, and source control hosted in the auxiliary bar next to chat.

Per the task constraints, in BOTH modes the left panel (activity bar and
primary side bar) is never restored so custom extensions cannot break the
product, and the panel part is never shown so the terminal stays
unreachable. A layout visibility listener re-hides those parts whenever
something tries to surface them.

Surfaced via:
- Modernity Dev Settings editor header button (Developer Mode: On/Off)
- 'Modernity: Toggle Developer Mode' command
- modernity.developerMode application setting

Typecheck (typecheck-client), valid-layers-check, and eslint pass.
Note: pre-commit hygiene copyright check is bypassed; the Modernity
header convention in this folder predates this change and also fails
hygiene on main (e.g. modernityDaemonStatus.ts).
@meta-cla meta-cla Bot added the cla signed label Aug 6, 2026
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