Several desktop copy entry points still called navigator.clipboard directly, which can fail or report success inconsistently in Tauri and browser test contexts. Route those copy actions through the existing textarea execCommand fallback helper and cover the fallback paths for startup diagnostics, markdown copy controls, and workspace file paths.
Constraint: Clipboard API is not reliable in every desktop/browser context.
Rejected: Leave direct navigator.clipboard calls in isolated components | repeats the diagnostics copy failure mode and creates inconsistent copy behavior.
Confidence: high
Scope-risk: narrow
Directive: New desktop copy controls should use copyTextToClipboard or CopyButton instead of calling navigator.clipboard directly.
Tested: cd desktop && bun run lint
Tested: cd desktop && bun run test -- --run src/components/markdown/MarkdownRenderer.test.tsx src/components/layout/StartupErrorView.test.tsx src/components/workspace/WorkspacePanel.test.tsx src/__tests__/diagnosticsSettings.test.tsx src/components/chat/MessageList.test.tsx
Tested: bun run check:desktop
Tested: bun run check:native
Tested: bun run check:coverage
Tested: bun run verify (passed=7 failed=0 skipped=3)
Not-tested: Live provider baseline; not required for this desktop-only clipboard fix.
Workspace and transcript selections now flow into the composer as lightweight references so users can carry exact snippets into the next prompt without file-only workarounds. The prompt formatter keeps workspace and chat excerpts separate, and the composer avoids sending chat snippets as fake file attachments.
Constraint: Selection references must prepare model context without polluting backend file attachment payloads.
Rejected: Reuse file attachments for chat selections | would leak chat:// pseudo paths into file-oriented payloads.
Confidence: high
Scope-risk: moderate
Directive: Keep chat-selection references prompt-only unless the backend gains a first-class chat context attachment type.
Tested: bun run check:desktop
Tested: bun run verify
Tested: agent-browser UI smoke for workspace, user-message, and assistant-message selections
Not-tested: Strict Chrome extension channel; connection timed out, local browser automation covered the flow.
H5 exposes the desktop chat surfaces in a much narrower viewport, so the empty-session composer needs the same inset treatment as active sessions and generated diff rows need intrinsic width instead of compressing long code into the phone viewport.
Constraint: Keep desktop layout and short diff-row backgrounds unchanged while enabling sideways scrolling on H5.
Rejected: Force wrapping long diff lines | it makes code harder to inspect and diverges from desktop diff behavior.
Confidence: high
Scope-risk: narrow
Directive: Keep workspace diff rows content-width driven when adjusting mobile code preview styling.
Tested: cd desktop && bun run test -- src/pages/EmptySession.test.tsx --run
Tested: cd desktop && bun run test -- src/components/workspace/WorkspacePanel.test.tsx --run
Tested: cd desktop && bun run lint
Not-tested: Full bun run verify gate; change is scoped to desktop UI styling and covered by narrow Vitest plus typecheck.
Contributors and coding agents need one local command that both reports and enforces the quality contract. This change turns the PR gate into the shared verification entrypoint, adds path-selected local lanes, tightens coverage accounting around changed lines, and documents the repair loop in contributor and agent-facing guidance.
Constraint: Ordinary PR verification must stay non-live and runnable without provider credentials
Constraint: Coverage policy updates in this commit require maintainer approval before push/merge
Rejected: Keep quality guidance only in docs | agents need executable scripts and AGENTS.md instructions to follow the loop consistently
Confidence: high
Scope-risk: broad
Directive: Do not bypass `bun run verify` for production changes; fix failed lanes and coverage reports instead of lowering thresholds
Tested: bun run check:policy
Tested: ALLOW_CLI_CORE_CHANGE=1 ALLOW_COVERAGE_BASELINE_CHANGE=1 bun run verify
Not-tested: live provider baseline; no provider credentials were required for this non-live PR gate
The desktop workspace panel and chat transcript were mixing project-level file state with per-turn session history, which made rewind, file attachment, and changed-file previews brittle across multi-turn and historical sessions. This keeps turn checkpoints durable in the transcript, makes workspace refreshes happen at the right lifecycle points, and hardens long file previews without blocking the UI.
Constraint: Right-side workspace changes are project working-tree state, while chat turn cards are session checkpoint state.
Rejected: Treat every changed-file panel entry as session-local | new sessions must still reveal existing dirty project files.
Confidence: high
Scope-risk: moderate
Directive: Do not couple global workspace status to session checkpoint cards without preserving both product meanings.
Tested: cd desktop && bun run test src/components/workspace/WorkspacePanel.test.tsx
Tested: cd desktop && bun run lint
Tested: git diff --check
Tested: cd desktop && bun run test
Not-tested: Packaged Tauri runtime smoke test
The workspace panel now treats an empty changed-files status as a browsing case, so opening the panel shows the project tree instead of an empty changed-files view. The panel header controls were also reduced to keep the right workspace rail visually proportional in compact layouts.
Constraint: Users still need to manually inspect the empty changed-files view when they explicitly choose it.
Rejected: Always render the empty changed-files state | it makes the opened workspace feel broken when no files changed.
Confidence: high
Scope-risk: narrow
Directive: Do not auto-switch the workspace view after a user has explicitly selected a workspace view.
Tested: cd desktop && bun run test -- 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: Browser E2E visual screenshot pass was not rerun for this small header sizing change.
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
