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Upgrade pi to 0.83.0 and adopt context-first harness tools - #72
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- Upgrade @earendil-works/pi-ai, pi-agent-core, pi-coding-agent, and
pi-tui to exact 0.83.0 with one deduplicated instance of each.
- Redesign CuaAgentHarness on pi's TContext-first AgentHarness generics:
CuaAgentHarness<TContext, TSkill, TPromptTemplate> accepts and forwards
toolContext directly, and executable harness tools are pi
AgentHarnessTool<TContext> via the new CuaHarnessTool<TContext> union.
CuaAgent stays on the ordinary AgentTool (CuaAgentTool).
- Remove CuaAgentHarnessOptions.env, CuaAgentHarness.env, and
CuaSystemPromptCallback with no aliases; execution environments now
travel through the tool context.
- Move CLI coding tools from pi-coding-agent createCodingTools(cwd) to
pi-agent-core createReadTool/createBashTool/createEditTool/
createWriteTool (order preserved), supplying
toolContext: { env: new NodeExecutionEnv({ cwd }) }.
- Adopt pi's Kimi K3 low/high/max reasoning-effort metadata and request
behavior with no override; pin the metadata and add payload regression
coverage for the CLI default low level on Moonshot and OpenRouter.
- Drop the local claude-opus-5 and gemini-3.6-flash/3.5-flash-lite
overrides now carried by pi's registry; keep the CUA-only Meta, Tzafon,
and Yutori models.
- Add a downstream published-declaration compile test (skipLibCheck:
false) and context-delivery tests proving custom harness tools receive
the exact supplied context, exercising pi's native read/bash/edit/
write tools through CUA.
- Release as @onkernel/cua-ai 0.10.0, @onkernel/cua-agent 0.10.0, and
@onkernel/cua-cli 0.8.0.
![cursor[bot]](https://avatars.githubusercontent.com/in/1210556?s=60&v=4){kind=small}
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Tzafon's Responses API rejects a computer_call_output whose output carries no image (400: empty image slot). After a non-screenshot action the tool result was text-only, so the follow-up request after any click or keypress failed and the turn ended in an API error. The Tzafon native computer spec now declares a postActionScreenshot execution policy, and CuaExecutionResources attaches a best-effort post-execution screenshot when an action batch produced no image read, on success and failure alike. A failed capture never masks the action outcome. Canonical and other provider-native tools are unchanged.
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Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.
There are 2 total unresolved issues (including 1 from previous review).
Autofix Details
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: Missing TSDoc on exported helper
- Added a TSDoc block to the exported mapThinkingLevel helper documenting purpose, defaulting behavior, and invalid-input error contract.
Or push these changes by commenting:
@cursor push 21209a2a93
Preview (21209a2a93)
diff --git a/packages/cli/src/cli-harness.ts b/packages/cli/src/cli-harness.ts
--- a/packages/cli/src/cli-harness.ts
+++ b/packages/cli/src/cli-harness.ts
@@ -487,6 +487,12 @@
return value && value.length > 0 ? value : undefined;
}
+/**
+ * Normalize CLI `--thinking` values to canonical harness thinking levels.
+ *
+ * Defaults to `"low"` when the flag is unset or empty, and throws when the
+ * input does not match a supported level.
+ */
export function mapThinkingLevel(raw: string | undefined): "off" | "minimal" | "low" | "medium" | "high" | "xhigh" | "max" {
const v = (raw ?? "low").trim().toLowerCase();
switch (v) {You can send follow-ups to the cloud agent here.
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Add the missing TSDoc on the newly exported mapThinkingLevel and record the postActionScreenshot execution policy in both 0.10.0 changelogs.
cua-cli 0.8.0 shipped from main with queued-turn steering, so the pi 0.83 CLI changes here move to a new 0.9.0 entry; the changelog conflict resolves to both entries and packages/cli bumps to 0.9.0.
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Cursor Bugbot has reviewed your changes using high effort and found 1 potential issue.
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: Tzafon image guard blocks continuations
- Native Tzafon tool-result replay now emits a text-backed
computer_screenshot.errorpayload when no image is present instead of throwing, so valid text-only continuations no longer hard-fail.
- Native Tzafon tool-result replay now emits a text-backed
Or push these changes by commenting:
@cursor push 62940dda82
Preview (62940dda82)
diff --git a/packages/ai/src/providers/tzafon/provider.ts b/packages/ai/src/providers/tzafon/provider.ts
--- a/packages/ai/src/providers/tzafon/provider.ts
+++ b/packages/ai/src/providers/tzafon/provider.ts
@@ -344,15 +344,12 @@
.trim();
const image = [...message.content].reverse().find((part): part is ImageContent => part.type === "image");
if (nativeComputerName && message.toolName === nativeComputerName) {
- if (!image) {
- throw new Error(
- "Tzafon native computer action loops require image tool results; text-only results are unsupported because CUA does not capture post-action screenshots automatically.",
- );
- }
items.push({
type: "computer_call_output",
call_id: message.toolCallId,
- output: { type: "computer_screenshot", image_url: `data:${image.mimeType};base64,${image.data}` },
+ output: image
+ ? { type: "computer_screenshot", image_url: `data:${image.mimeType};base64,${image.data}` }
+ : { type: "computer_screenshot", error: message.isError ? text || "tool execution failed" : text || "no screenshot" },
});
continue;
}
diff --git a/packages/ai/test/tzafon-provider.test.ts b/packages/ai/test/tzafon-provider.test.ts
--- a/packages/ai/test/tzafon-provider.test.ts
+++ b/packages/ai/test/tzafon-provider.test.ts
@@ -99,8 +99,8 @@
expect(toolCalls(message.content)).toEqual([]);
});
- it("rejects text-only native computer results before sending a request", () => {
- expect(() => tzafon.buildTzafonRequestInput(model, {
+ it("serializes text-only native computer results as computer_screenshot errors", () => {
+ const payload = tzafon.buildTzafonRequestInput(model, {
messages: [
{
role: "assistant",
@@ -125,7 +125,19 @@
}, {
disableResponseThreading: true,
cuaIncomingToolPlan: { tzafonComputerName: "computer", yutoriNames: {}, googleNames: {}, googleExcludedNames: [], nativeToolNames: ["computer"] },
- })).toThrow("text-only results are unsupported");
+ });
+
+ expect(payload.input).toEqual(expect.arrayContaining([
+ expect.objectContaining({ type: "computer_call", call_id: "call_click" }),
+ expect.objectContaining({
+ type: "computer_call_output",
+ call_id: "call_click",
+ output: {
+ type: "computer_screenshot",
+ error: "Actions executed successfully.",
+ },
+ }),
+ ]));
});
it("degrades malformed function-call arguments to empty args instead of failing the turn", async () => {You can send follow-ups to the cloud agent here.
Reviewed by Cursor Bugbot for commit f588ba4. Configure here.
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Summary
Upgrades the whole pi stack to exact 0.83.0 (
@earendil-works/pi-ai,pi-agent-core,pi-coding-agent,pi-tui) with one deduplicated instance of each, and adopts pi 0.83's context-first harness API as a breaking release:@onkernel/cua-ai0.10.0,@onkernel/cua-agent0.10.0,@onkernel/cua-cli0.9.0 (0.8.0 shipped from main with queued-turn steering while this PR was open).Harness redesign (
@onkernel/cua-agent)CuaAgentHarnessandCuaAgentHarnessOptionsare now TContext-first —CuaAgentHarness<TContext, TSkill, TPromptTemplate>— mirroring pi'sAgentHarnessgeneric order and semantics. The suppliedtoolContextis forwarded to pi untouched.AgentHarnessTool<TContext>via the newCuaHarnessTool<TContext>union (a CUA spec or anAgentHarnessTool).CuaAgentstays on the ordinary piAgentTool(CuaAgentTool); the two tool APIs are no longer conflated.CuaToolManagernow materializes both views from one compiled catalog.CuaAgentHarnessOptions.env,CuaAgentHarness.env, andCuaSystemPromptCallback— no aliases. Execution environments travel through the tool context;systemPromptis pi'sAgentHarnessSystemPrompt.CuaAgentHarnessOptions.retryomits pi's new harnessretry?: RetryPolicy(compaction/branch-summary) so it keeps meaning CUA's provider retry policy, unchanged.streamFnstays optional onCuaAgentOptions(CUA supplies its default stream) even though pi 0.83 makesAgentOptions.streamFnrequired.CLI (
@onkernel/cua-cli)createCodingTools(cwd)to pi-agent-corecreateReadTool/createBashTool/createEditTool/createWriteTool(read/bash/edit/write order preserved), withtoolContext: { env: new NodeExecutionEnv({ cwd }) }.low/high/maxmap throughthinkingLevelMap, and the CLI default (--thinkingunset →low) sendsreasoning_effort: "low"to Moonshot andreasoning: { effort: "low" }through OpenRouter. New payload regression tests pin both.Models (
@onkernel/cua-ai)claude-opus-5,gemini-3.6-flash, andgemini-3.5-flash-liteoverrides — pi 0.83's registry carries all three with the same metadata. Overrides remain only for the CUA-only providers pi does not ship (Meta, Tzafon, Yutori).Tzafon native action-loop guard (
@onkernel/cua-ai)computer_call_outputto carry an image. CUA does not synthesize post-action screenshots, so native non-screenshot actions now fail before browser execution instead of entering an unsupported text-only loop. Explicit screenshot and terminal answer actions remain supported.toolResultImageReplayLimit, since pruning them would make valid history impossible to replay through that protocol. Other tool-result images remain bounded.Tests
npm run typecheck(clean build): pass.@onkernel/cua-ai: 114 passed.@onkernel/cua-agent: 291 passed, 19 skipped (live tests self-skip withoutKERNEL_API_KEY).@onkernel/cua-cli: 141 passed, 14 skipped (ptywright native binding not built locally).harness-context.test.tsproves a custom harness tool receives the exact supplied context object and drives pi's native read/write/edit/bash tools through CUA against a real temp directory;published-declarations.test.tscompiles a downstream consumer against the packageddist/declarations withskipLibCheck: false;kimi-reasoning-payload.test.tspins the default-low payloads; Tzafon provider tests pin the native non-screenshot rejection before browser execution.cua models,cua --help) without secrets.npm ls: single 0.83.0 of each pi package, single typebox 1.3.7.npm audit: 3 remaining advisories (brace-expansion, undici via pi-coding-agent, and a moderate) are pre-existing onmainand pinned by upstream dependency ranges; not changed by this PR.packages/ptywright's own test suite fails on main with extensionless ESM imports (ERR_MODULE_NOT_FOUNDfordist/index); this PR does not touch ptywright. Latent type errors inbrowser-wait.test.ts/cli-executor.test.tsalso predate this change (test files are outside every tsconfig project).Note
High Risk
Breaking public harness and CLI APIs plus a major pi/TypeBox bump affect all consumers; Tzafon and image-replay behavior changes are easy to miss in integration testing.
Overview
Bumps the monorepo to pi 0.83.0 (
pi-ai,pi-agent-core,pi-coding-agent,pi-tui) and ships breaking 0.10.0 agent/ai and 0.9.0 CLI releases.CuaAgentHarnessis now context-first: generics areCuaAgentHarness<TContext, …>, harness tools areCuaHarnessTool/ piAgentHarnessToolwithtoolContextforwarded on each call, andenvon the harness is removed (execution env goes throughtoolContext, e.g.NodeExecutionEnvfor read/bash/edit/write).CuaAgentkeeps context-freeCuaAgentTool;CuaToolManagerexposes both agent and harness tool views from one catalog.CLI swaps
createCodingToolsfor pi-agent-core read/bash/edit/write tools and wirestoolContext: { env }. Kimi K3 default thinking maps toreasoning_effort: lowper pi catalog metadata.@onkernel/cua-aidrops local overrides for Opus 5 and Gemini models now in pi’s registry. Tzafon rejects native non-screenshot computer actions and text-only native tool results because continuation requires images CUA does not auto-capture. Agent exempts Tzafon native screenshot tool results fromtoolResultImageReplayLimittrimming.New tests cover harness tool context, published declarations with
skipLibCheck: false, Kimi payloads, and Tzafon guards; docs note pi 0.83.0 for dynamicsetTools()behavior.Reviewed by Cursor Bugbot for commit e922447. Bugbot is set up for automated code reviews on this repo. Configure here.