The session workspace and current-turn undo surfaces now have regression coverage for multi-turn rollback semantics, stale current-turn cards, and dark theme workspace token usage.
Constraint: Workspace rollback must behave consistently for git and non-git session review flows.
Rejected: Rely on manual browser-only checks | they do not guard future regressions.
Confidence: high
Scope-risk: narrow
Directive: Keep rollback tests focused on target user message identity, not only visible index position.
Tested: bun test src/server/__tests__/sessions.test.ts
Tested: cd desktop && bun run test -- src/components/chat/MessageList.test.tsx src/components/workspace/WorkspacePanel.test.tsx src/stores/workspacePanelStore.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Not-tested: Full live multi-turn assistant generation E2E across a fresh temporary project.
Workspace inspection now shares the same diff renderer between chat change cards and panel previews, supports scoped preview-tab closing, confirms checkpoint undo, resolves rewind checkpoints from the prompt cwd, and removes light-only workspace chrome so dark theme remains coherent.
Constraint: Workspace review must keep working for existing transcript sessions and non-git session-derived changes.
Rejected: Keep a separate chat diff preview | it drifted from panel rendering and dark theme behavior.
Confidence: high
Scope-risk: moderate
Directive: Keep chat and workspace diff rendering shared so theme and truncation behavior do not diverge again.
Tested: cd desktop && bun run test -- src/components/workspace/WorkspacePanel.test.tsx src/components/chat/MessageList.test.tsx src/stores/workspacePanelStore.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Tested: bun test src/server/__tests__/sessions.test.ts
Tested: Browser dark workspace preview at http://127.0.0.1:59468/ with src/App.jsx diff
Not-tested: macOS packaged app build
Workspace file preview is a local desktop surface, so image files should not be blocked by the text preview byte cap. Large text files now return a bounded preview instead of an unusable too-large state, while binary files remain explicitly unsupported.
Constraint: Avoid unbounded text payloads that can freeze the desktop renderer
Rejected: Remove all read limits | large generated files can still overload JSON transport and syntax rendering
Confidence: high
Scope-risk: moderate
Directive: Keep image preview detection before text-size limiting so local images remain renderable
Tested: bun test src/server/__tests__/workspace-service.test.ts
Tested: bun test src/server/__tests__/sessions.test.ts
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run test -- src/components/workspace/WorkspacePanel.test.tsx
Tested: cd desktop && bun run build
Not-tested: Full packaged macOS smoke after this commit
Workspace inspection was visible only as a side panel, while file restore still lived behind the older per-message rewind affordance. This adds a chat-flow change card for the completed turn, keeps undo routed through checkpoint rewind, and tightens the workspace split layout so narrow and fullscreen windows keep both chat and file preview usable.
Constraint: Current session file changes must work for non-Git directories when transcript tool edits are available
Constraint: Workspace preview must remain right-docked without horizontal overflow across narrow and wide desktop viewports
Rejected: Keep only hover rewind | users could not clearly see what the current turn changed before undoing it
Rejected: Use Git as the only changed-file source | many desktop sessions run in temporary or non-Git directories
Confidence: high
Scope-risk: moderate
Directive: Keep checkpoint rewind as the source of truth for undo semantics; workspace diffs are a preview surface, not the restore authority
Tested: bun test src/server/__tests__/sessions.test.ts src/server/__tests__/workspace-service.test.ts
Tested: cd desktop && bun run test -- src/components/chat/MessageList.test.tsx src/components/workspace/WorkspacePanel.test.tsx src/stores/workspacePanelStore.test.ts src/pages/ActiveSession.test.tsx
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run build
Tested: bun /tmp/cc-haha-layout-e2e/run-layout-e2e.mjs
Not-tested: Native Tauri packaged app window chrome behavior
Expose a workspace inspector for desktop sessions so users can browse the active project, preview files, inspect session-derived changes, and review diffs even when the work directory is not a git repository.
Constraint: The workspace view must work for temporary and non-git project directories.
Rejected: Rely only on git status | non-git sessions would lose the changed-files surface.
Confidence: medium
Scope-risk: moderate
Directive: Keep undo semantics separate from workspace browsing; checkpoint-backed rewind should remain the source of truth for rollback.
Tested: bun test src/server/__tests__/sessions.test.ts src/server/__tests__/workspace-service.test.ts
Tested: cd desktop && bun run test -- src/components/workspace/WorkspacePanel.test.tsx src/stores/workspacePanelStore.test.ts
Tested: cd desktop && bun run lint
Tested: git diff --check
Not-tested: Full desktop packaged app build after this commit
