PR 2: rebuild interactive TUI on CuaAgentHarness + pi-tui 0.79 - #23
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Per the migration plan (docs/cua-cli-harness-migration.md), the interactive TUI moves off the legacy provider-wiring stack and onto the harness: - tui/main.ts subscribes to harness.subscribe() and routes AgentHarnessEvent into a pi-tui differential renderer. Assistant text streams through pi-tui Markdown, screenshots through pi-tui Image, Editor handles input. Status line shows browser session / live url / working indicator; telemetry footer shows provider/model and thinking level, sourced from harness.getModel() / harness.getThinkingLevel() and refreshed on model_update / thinking_level_update events. - tui/slash-commands.ts builds a CombinedAutocompleteProvider with /model, /thinking, /compact and one /skill:<name> entry per loaded skill. Model and thinking arguments expose getArgumentCompletions for tab cycling. parseSlashCommand routes the editor onSubmit text into harness.setModel / harness.setThinkingLevel / harness.compact / harness.skill, falling back to harness.prompt for plain text. - Ctrl+C and Escape during a turn call harness.abort(); subsequent Ctrl+C exits. - tui/screenshot-widget.ts is a thin wrapper around pi-tui Image (0.79 already restores cursor after kitty/iTerm2 payloads, so the legacy StableInlineImage workaround is gone). - tui/diagnostics.ts and tui/themes.ts re-target @earendil-works/pi-tui and add the Markdown theme used by the message list. CLI wiring: - cli-harness.ts gains runInteractiveCommand which assembles the harness through the same setupHarnessRuntime() used by --print and the action subcommands. cli.ts dispatches the default interactive entry point through it; the legacy agent.ts / config.ts / models.ts / sessions.ts imports are gone from the interactive path. - HarnessCliFlags gains debugTui and imageProtocol so the TUI can keep --debug-tui and --image-protocol / CUA_IMAGE_PROTOCOL behavior. Tests: - test/fixtures/tui-fixture-runner.ts is a tsx-runnable child process that registers the scripted provider, builds the production harness via buildCuaHarness, and starts runInteractive against a fake Kernel client. - test/fixtures/scripted-provider.ts gains chunked text deltas (chunkSize / chunkMs) and a wait_abort step so streaming + abort scenarios can be expressed declaratively while still flowing through the harness. - test/tui.fixture.test.ts ports the four legacy ptywright scenarios (streaming render, multiline editor, ctrl+c abort + recover, error rendering). The suite skips cleanly when the ptywright native binding is not built so vitest stays green where ghostty-vt is unavailable. - test/slash-commands.test.ts covers parseSlashCommand directly. - src/tui/driver.ts and src/tui/testing/* are deleted; the harness drives the UI directly.
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Review verdict: needs changes (posted as a comment because GitHub does not allow request-changes from the PR author's account; treat this as a request-changes review — 1 blocker, 1 major).
Reviewed against docs/cua-cli-harness-migration.md (PR 2 section). The TUI rebuild itself is solid: harness.subscribe() consumption is correct against the 0.79 event types (model_update, thinking_level_update, session_compact/compactionEntry all verified), the interactive path no longer imports agent.ts/config.ts/old models/sessions/skills (cli.ts's ./config import serves only the cua config subcommand, which PR 3 deletes), packages/agent/packages/ai are untouched, and scope is clean. Build green (tsc -b, cua-cli workspace build), non-ptywright vitest suites green (29 passed).
The test half of the PR does not meet the acceptance criteria, and I verified this empirically: I built the ptywright native binding locally (zig 0.15.2) and ran the suite.
Blocker — the four ported ptywright scenarios cannot pass anywhere, for two independent reasons:
-
test/tui.fixture.test.ts:21resolves tsx as../node_modules/.bin/tsx→packages/cua-cli/node_modules/.bin/tsx. tsx is a root devDependency and npm hoists it, so that path doesn't exist; all 4 tests die at spawn withexecvp(3) failed.: No such file or directory. Any machine with the binding built (the only place the suite runs at all) gets 4/4 failures. Resolve tsx robustly (e.g. viacreateRequire(import.meta.url).resolve(...), or spawnprocess.execPathwith--import tsx) rather than a hoisting-dependent relative path. -
After fixing (1) locally, 3/4 still fail.
registerScriptedProviderreplays turns strictly sequentially per process (turns[state.index++]), but every test spawns its own runner process on the samebasic.json— so each test's first prompt always consumes turn[0] ("fixture response"). The multiline test then never sees "multiline ok", the abort test never sees "working...", and the error test renders "fixture response" instead of "fixture provider failed" (verified on screen snapshots). The legacy DSL matched interactions by prompt content (match.equals); the port silently dropped that, and the 5-turn layout inbasic.jsononly works if one session ran all scenarios back-to-back. Fix: one fixture file per scenario (streaming/multiline/abort/error), or restore prompt matching in the fixture format.
Major — acceptance criterion "ptywright suite green in CI" is not met. CI (cli-unit job) never builds zig/ghostty-vt, so the suite always describe.skips — zero TUI regression coverage in CI, and the skip gate is exactly what let the two bugs above land unexercised. The PR calls this a deviation, but the justification ("non-trivial CI step") is hard to accept when the criterion exists precisely to catch this: the build is a pinned zig 0.15.2 download plus npm run build --workspace @onkernel/ptywright (a few minutes, cacheable — the repo already supports PTYWRIGHT_ZIG/.dev/tools). Please wire it into CI in this PR, or at minimum add an env switch that makes skipping fatal in CI so the suite can't silently vanish.
Minor
tui/message-list.tsformatToolCall:case "computer_navigation"never matches — the canonical navigation tool name iscomputer_use_extra(CUA_NAVIGATION_TOOL_NAME, packages/aiproviders/common.ts:319). Navigation calls fall through todescribeAction, which keys ontype(navigation args are{action, url}), so the TUI shows a dim JSON dump instead ofgoto(url)./compactproduces a duplicate "compacted N tokens" notice:harness.compact()emitssession_compact(handled in the subscriber) andapplyCompactCommandadds the same notice after the call resolves.- Footer provider goes stale on a cross-provider
/model: themodel_updatehandler andapplyModelCommandupdatemodel/contextWindowbut neverprovider, and the footer rendersprovider/model— switching openai→anthropic shows "openai/claude-…".event.model.provideris right there. Related cosmetic drift: the status line starts with the full ref (openai:gpt-5.5) and switches to bare model id after the first update. - First-input
/skill:<name>no longer attaches the initial screenshot. Legacy expanded the skill into a normal prompt that went through the screenshot-attaching path;harness.skill()bypassesmaybeInitialScreenshot, so a skill-first session's first turn runs without seeing the browser.
Nit
main.ts:450setModel(ref as never)andtui-fixture-runner.tsmodel: modelRef as never— the parameter isCuaModelRef | Model<Api>; cast honestly (as CuaModelRef) or better, run/modelinput throughresolveCuaModelRef(also gains-m-style bare-id support). The(initialModel as Model<Api>)/(event.model as Model<Api>)casts are redundant — both are alreadyModel<any>withcontextWindow.InteractiveOptions.thinkingLevelis dead: passed byrunInteractiveCommand, never read (the footer usesharness.getThinkingLevel()).runInteractiveCommandis the only harness entry point without atry/finallyaround handle cleanup; a throw betweensetupHarnessRuntime()andrunInteractive's internalfinally(component construction, etc.) leaks the provisioned browser.parseSlashCommand's/skill:branch duplicatesparseSkillInvocation's regex inharness-skills.ts(acknowledged in the PR) — fine to unify in PR 3.
Deviations assessment: dropping the auto-compaction footer flag is consistent with the plan's feature sacrifices — fine. Keeping --config-profile routed only to cua config show is a reasonable transitional state for PR 3 — fine. Gating the ptywright suite behind describe.skip is not an acceptable substitute for the CI acceptance criterion, per above.
Happy to re-review once the fixture suite actually runs and passes.
- ptywright fixture suite: split basic.json into per-scenario fixtures
(streaming/multiline/abort/error) so each test spawns a fresh runner
process and the scripted provider's sequential turn replay never
crosses scenarios; resolve tsx via createRequire(tsx/cli) and spawn
process.execPath instead of the hoisting-dependent .bin path.
- ci.yml: download zig 0.15.2 + build ptywright native binding in the
cli-unit job; set PTYWRIGHT_REQUIRED=1 so the silent skip becomes a
failure when the binding is absent.
- tui/message-list: rename the navigation tool-call case to
computer_use_extra (canonical CUA_NAVIGATION_TOOL_NAME) so
navigation calls render via the goto/action summary path again.
- tui/main:
- /compact: drop the duplicate notice (session_compact event posts it).
- model_update + applyModelCommand: update provider too so the
telemetry footer stays correct on cross-provider /model switches;
initialize StatusLine with the bare model id for consistency.
- /skill first prompt: when no prior turn exists, fall back to
prompt(formatSkillInvocation(...), { images }) so the skill turn
sees the initial browser screenshot.
- Replace 'as never' casts with resolveCuaModelRef + as CuaModelRef;
drop redundant Model<Api> casts.
- Remove the unused InteractiveOptions.thinkingLevel field.
- cli-harness: wrap runInteractive in try/finally so the provisioned
browser is closed even when the TUI throws during setup; remove the
duplicate close in runInteractive.
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Created a monitoring plan for this PR. What this PR does: Rebuilds the interactive Intended effect: No production telemetry signal exists for this CLI package. Confirmation is at the release level: all 29 unit tests + 4 ptywright TUI scenarios (streaming, multiline editor, ctrl+c abort/recover, error rendering) pass in CI before publish. Risks:
Status updates will be posted automatically on this PR as monitoring progresses. |
Ghostty's internal combine_archives tool spawns 'zig ar -M' directly, so the cached zig binary must be discoverable on PATH for the native binding build to succeed.
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Summary
harness.subscribe()+ pi-tui 0.79 primitives so the interactive path no longer imports the legacyagent.ts/config.ts/models.ts/sessions.ts/skills.tswiring.tui/main.tsnow consumesAgentHarnessEvent: assistant text streams into a pi-tuiMarkdownbody, screenshots into pi-tuiImage, tool calls show as compact entries, and the editor handles slash commands.model_update/thinking_level_update/session_compactevents keep the status line and telemetry footer in sync.tui/slash-commands.tsprovides aCombinedAutocompleteProviderwith/model,/thinking,/compact, and one/skill:<name>entry per loaded skill. Model and thinking arguments exposegetArgumentCompletionsfor tab cycling. Slash invocations route toharness.setModel/harness.setThinkingLevel/harness.compact/harness.skill; plain text routes toharness.prompt.tui/screenshot-widget.tsis now a thin wrapper around pi-tui 0.79Image(cursor restoration is fixed upstream so the legacyStableInlineImageworkaround is gone).tui/themes.tsandtui/diagnostics.tsre-target@earendil-works/pi-tui.cli-harness.tsgainsrunInteractiveCommandwhich assembles the harness through the samesetupHarnessRuntime()used by--printand the action subcommands.cli.tsdispatches the default interactive entry point through it.HarnessCliFlagscarriesdebugTuiandimageProtocolso--debug-tuiand--image-protocol/CUA_IMAGE_PROTOCOLkeep working.src/tui/driver.tsandsrc/tui/testing/*are deleted. Tests now assemble the real harness over the PR 1 scripted provider:test/fixtures/tui-fixture-runner.tsis atsx-runnable child process that registers the scripted provider, builds the production harness viabuildCuaHarness, and startsrunInteractiveagainst the fake Kernel client.test/fixtures/scripted-provider.tsgains chunked text deltas (chunkSize/chunkMs) and await_abortstep so the streaming + abort scenarios run end-to-end through the harness.test/tui.fixture.test.tsports the four legacy ptywright scenarios — streaming render, multiline editor, ctrl+c abort + recover, error rendering. The suite skips cleanly when the ptywright native binding (libghostty-vt) is not built, so vitest stays green where zig is unavailable.test/slash-commands.test.tscoversparseSlashCommanddirectly.Map to the plan
harness.subscribe()":tui/main.ts.tui/message-list.ts,tui/screenshot-widget.ts.tui/status-line.ts,tui/telemetry-footer.ts.tui/slash-commands.ts.tui/debug-log.ts(unchanged) +tui/diagnostics.ts.test/fixtures/tui-fixture-runner.ts,test/fixtures/tui-fixtures/basic.json,test/tui.fixture.test.ts.Tests
npx tsc -bclean.npm test --workspace @onkernel/cua-cli: 29 passed, 4 skipped (the ptywright suite — see below).PTYWRIGHT_ZIG=<zig 0.15.2> npm run build --workspace @onkernel/ptywright). It auto-skips when the binding is absent so vitest doesn't fail on environments without zig. Building zig + ghostty-vt in CI is left for a follow-up.Deviations
tui.fixture.test.tsis gated behind a native-binding existence check (describe.skip) instead of unconditionally running, because installing zig 0.15.2 + building ghostty-vt is a non-trivial CI step. The four ptywright scenarios are otherwise a 1:1 port of the legacytui/testing/fixture.test.ts.isAutoCompactEnabledfrom the legacy stack) is dropped — the plan called for it./compactremains as a manual harness call.--config-profileis preserved and routed only tocua config show(legacy TOML viewer). PR 3 deletes thecua configcommand entirely.🤖 Generated with Claude Code
Note
Medium Risk
Large interactive-path refactor (session/browser provisioning, harness events, abort/streaming) with new native CI dependency; mitigated by ptywright fixture tests and shared setupHarnessRuntime with print/actions.
Overview
Rebuilds the interactive
cuaTUI onCuaAgentHarnessand@earendil-works/pi-tui0.79, dropping the legacy interactive stack (agent.ts, TOML config loading,LiveInteractiveDriver, andsrc/tui/testing/*).The default interactive entry now goes through
runInteractiveCommandincli-harness.ts, which uses the samesetupHarnessRuntime()path as--printand action subcommands.cli.tsno longer provisions browsers or sessions itself; it only maps flags and dispatches.tui/main.tsdrives the UI fromharness.subscribe()(AgentHarnessEvent): streaming assistant text via Markdown, screenshots via pi-tui Image, tool summaries, and abort viaharness.abort(). Slash input is handled in-editor:slash-commands.tsadds autocomplete for/model,/thinking,/compact, and/skill:<name>, wired tosetModel,setThinkingLevel,compact, andskill/prompt.--debug-tuiand--image-protocolflow through harness flags into diagnostics.Tests replace the scripted driver with a
tui-fixture-runnerchild process that registers the scripted provider and runs the realbuildCuaHarness+runInteractive. Four ptywright scenarios live intest/tui.fixture.test.ts(skip when the native binding is absent;PTYWRIGHT_REQUIRED=1in CI). CIcli-unitinstalls Zig, caches ptywright artifacts, builds@onkernel/ptywright, and runs CLI tests with ptywright required.Reviewed by Cursor Bugbot for commit bc414c9. Bugbot is set up for automated code reviews on this repo. Configure here.