feat(catalog): replay xAI encrypted reasoning on later turns

Stop stripping type=reasoning history for xai and xai-oauth so
encrypted_content from include is sent back on the next Responses request.

docs/provider-endpoint-constraints.md

@@ -241,8 +241,8 @@ Both the paid API-key provider (`xai` / `XAI_API_KEY`) and SuperGrok OAuth
 (`xai-oauth`) chat over `https://api.x.ai/v1/responses`. Keep these independent:
 
 - omit `reasoning.effort`
-- include `reasoning.encrypted_content` (request `include`) vs replay history
-- filter reasoning-history wrappers
+- include `reasoning.encrypted_content` on the request
+- replay encrypted reasoning items on later turns
 
 Some models reject only one of those fields; do not collapse them into one
 "Grok mode" branch.

packages/ai/test/xai-oauth-effort-strip.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, test } from "bun:test";
 import { buildParams } from "@oh-my-pi/pi-ai/providers/openai-responses";
-import type { Context } from "@oh-my-pi/pi-ai/types";
+import type { AssistantMessage, Context, Model } from "@oh-my-pi/pi-ai/types";
 import { Effort } from "@oh-my-pi/pi-catalog/effort";
 import { getSupportedEfforts } from "@oh-my-pi/pi-catalog/model-thinking";
 import { getBundledModel } from "@oh-my-pi/pi-catalog/models";
@@ -95,4 +95,78 @@ describe("xAI OAuth Responses reasoning payload (regression)", () => {
 
 		expect(params.include).toContain("reasoning.encrypted_content");
 	});
+
+	test("xai-oauth/grok-4.5 replays encrypted reasoning on the next turn", () => {
+		const grok45 = getBundledModel<"openai-responses">("xai-oauth", "grok-4.5");
+		if (!grok45) throw new Error("xai-oauth/grok-4.5 must be in bundled models.json");
+
+		const { params } = buildParams(grok45, followUpContextWithEncryptedReasoning(grok45), undefined, undefined);
+
+		expect(params.include).toContain("reasoning.encrypted_content");
+		expect(findEncryptedReasoning(params.input)).toEqual({
+			type: "reasoning",
+			id: "rs_xai_next_turn",
+			encrypted_content: "enc_next_turn",
+		});
+	});
+
+	test("paid xai/grok-4.5 replays encrypted reasoning on the next turn", () => {
+		const grok45 = getBundledModel<"openai-responses">("xai", "grok-4.5");
+		if (!grok45) throw new Error("xai/grok-4.5 must be in bundled models.json");
+
+		const { params } = buildParams(grok45, followUpContextWithEncryptedReasoning(grok45), undefined, undefined);
+
+		expect(findEncryptedReasoning(params.input)).toEqual({
+			type: "reasoning",
+			id: "rs_xai_next_turn",
+			encrypted_content: "enc_next_turn",
+		});
+	});
 });
+
+function followUpContextWithEncryptedReasoning(model: Model<"openai-responses">): Context {
+	const assistant: AssistantMessage = {
+		role: "assistant",
+		content: [
+			{
+				type: "thinking",
+				thinking: "internal plan",
+				thinkingSignature: JSON.stringify({
+					type: "reasoning",
+					id: "rs_xai_next_turn",
+					encrypted_content: "enc_next_turn",
+				}),
+			},
+			{ type: "text", text: "done" },
+		],
+		api: "openai-responses",
+		provider: model.provider,
+		model: model.id,
+		usage: {
+			input: 0,
+			output: 0,
+			cacheRead: 0,
+			cacheWrite: 0,
+			totalTokens: 0,
+			cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+		},
+		stopReason: "stop",
+		timestamp: 1,
+	};
+	return {
+		messages: [
+			{ role: "user", content: "first", timestamp: 0 },
+			assistant,
+			{ role: "user", content: "continue", timestamp: 2 },
+		],
+	};
+}
+
+function findEncryptedReasoning(input: unknown): Record<string, unknown> | undefined {
+	if (!Array.isArray(input)) return undefined;
+	return input.find(item => {
+		if (!item || typeof item !== "object") return false;
+		const candidate = item as { type?: unknown; encrypted_content?: unknown };
+		return candidate.type === "reasoning" && typeof candidate.encrypted_content === "string";
+	}) as Record<string, unknown> | undefined;
+}

packages/catalog/CHANGELOG.md

@@ -135,6 +135,13 @@
 - Fixed GitHub Copilot dynamic discovery retaining stale bundled prices for default-context models instead of using the provider's reported default-tier prices.
 
 ## [17.2.5] - 2026-08-03
+### Changed
+
+- Switched the paid xAI provider (`xai` / `XAI_API_KEY`) from Chat Completions to the OpenAI Responses API (`POST https://api.x.ai/v1/responses`), matching SuperGrok `xai-oauth`. Prompt-cache affinity (`x-grok-conv-id`), reasoning-effort allowlisting, and encrypted-reasoning replay rules are now shared across both first-party xAI hosts.
+- Changed the paid xAI (`XAI_API_KEY`) default model from `grok-4-fast-non-reasoning` to `grok-4.5`.
+- Changed the SuperGrok (`xai-oauth`) default model from `grok-4.3` to `grok-4.5`.
+- Requested `reasoning.encrypted_content` on first-party xAI Responses calls (`xai` and `xai-oauth`) via the `include` parameter.
+- Replayed xAI encrypted reasoning items on later Responses turns instead of stripping `type: "reasoning"` history.
 
 ### Fixed
 

packages/catalog/src/compat/openai.ts

@@ -714,12 +714,11 @@ export function buildOpenAIResponsesCompat(spec: OpenAIResponsesSpecLike): Resol
 		thinkingFormat,
 		reasoningDisableMode: resolveReasoningDisableMode(thinkingFormat),
 		omitReasoningEffort: false,
-		// Ask xAI `/v1/responses` for `reasoning.encrypted_content` the same way
-		// first-party OpenAI Responses does. History still drops `type:
-		// "reasoning"` wrappers (`filterReasoningHistory`) independently —
-		// those two flags must not be collapsed.
+		// Ask xAI `/v1/responses` for `reasoning.encrypted_content` and replay
+		// those items on later turns. OpenRouter Anthropic still filters
+		// reasoning wrappers independently.
 		includeEncryptedReasoning: true,
-		filterReasoningHistory: isXaiHost || (isOpenRouter && isAnthropicModel),
+		filterReasoningHistory: isOpenRouter && isAnthropicModel,
 		disableReasoningOnForcedToolChoice: isKimiModel,
 		disableReasoningOnToolChoice: isDeepseekFamily && reasoningCapable && !isOpenRouter,
 		supportsToolChoice: true,

packages/catalog/src/models.json

@@ -104484,7 +104484,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": true,
 				"supportsReasoningEffort": false
@@ -104516,7 +104516,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": true,
 				"supportsReasoningEffort": false
@@ -104560,7 +104560,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": false,
 				"supportsReasoningEffort": true
@@ -104605,7 +104605,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": false,
 				"supportsReasoningEffort": true
@@ -104650,7 +104650,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": false,
 				"supportsReasoningEffort": true
@@ -104710,7 +104710,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": true,
 				"supportsReasoningEffort": false
@@ -104742,7 +104742,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": true,
 				"supportsReasoningEffort": false
@@ -104773,7 +104773,7 @@
 					"minimal": "low"
 				},
 				"includeEncryptedReasoning": true,
-				"filterReasoningHistory": true,
+				"filterReasoningHistory": false,
 				"supportsImageDetailOriginal": false,
 				"omitReasoningEffort": true,
 				"supportsReasoningEffort": false

packages/catalog/src/provider-models/openai-compat.ts

@@ -1353,7 +1353,7 @@ function withXaiOAuthCompatDefaults(model: ModelSpec<"openai-responses">): Model
 	const compat = {
 		...(model.compat ?? {}),
 		includeEncryptedReasoning: model.compat?.includeEncryptedReasoning ?? true,
-		filterReasoningHistory: model.compat?.filterReasoningHistory ?? true,
+		filterReasoningHistory: model.compat?.filterReasoningHistory ?? false,
 		supportsImageDetailOriginal: model.compat?.supportsImageDetailOriginal ?? false,
 		omitReasoningEffort: model.compat?.omitReasoningEffort ?? !isGrokReasoningEffortCapable(model.id),
 	};
@@ -1396,7 +1396,7 @@ function mergeCuratedIntoModel(
 		...(base.compat ?? {}),
 		reasoningEffortMap: { ...XAI_REASONING_EFFORT_MAP, ...(base.compat?.reasoningEffortMap ?? {}) },
 		includeEncryptedReasoning: base.compat?.includeEncryptedReasoning ?? true,
-		filterReasoningHistory: base.compat?.filterReasoningHistory ?? true,
+		filterReasoningHistory: false,
 		supportsImageDetailOriginal: base.compat?.supportsImageDetailOriginal ?? false,
 		omitReasoningEffort: !effortCapable,
 		supportsReasoningEffort: effortCapable,

packages/catalog/test/build.test.ts

@@ -258,8 +258,8 @@ describe("xAI Responses reasoning-effort suppression", () => {
 		expect(oauth.promptCacheSessionHeader).toBe("x-grok-conv-id");
 		expect(paid.includeEncryptedReasoning).toBe(true);
 		expect(oauth.includeEncryptedReasoning).toBe(true);
-		expect(paid.filterReasoningHistory).toBe(true);
-		expect(oauth.filterReasoningHistory).toBe(true);
+		expect(paid.filterReasoningHistory).toBe(false);
+		expect(oauth.filterReasoningHistory).toBe(false);
 		expect(paid.supportsImageDetailOriginal).toBe(false);
 		expect(oauth.supportsImageDetailOriginal).toBe(false);
 		expect(paid.supportsReasoningEffort).toBe(true);

packages/coding-agent/CHANGELOG.md

@@ -388,6 +388,13 @@
 
 - Exposed the script-driven computer schema to all models, including those with provider-native Computer Use support.
 - Reduced omp --help cold-start latency and memory usage by rendering lightweight command metadata.
+- Exposed the script-driven `computer` schema to every model, including models with provider-native Computer Use support, because native action declarations cannot express persistent desktop sessions or accessibility handles.
+- Reduced `omp --help` cold-start latency and memory use by rendering lightweight command metadata without loading every runtime command and provider graph.
+- Routed paid xAI models (`XAI_API_KEY` / `xai/…`) through the Responses API used by SuperGrok OAuth instead of Chat Completions.
+- Changed the default model for `XAI_API_KEY` (`xai`) from `grok-4-fast-non-reasoning` to `grok-4.5`.
+- Changed the default model for SuperGrok OAuth (`xai-oauth`) from `grok-4.3` to `grok-4.5`.
+- Included `reasoning.encrypted_content` in Responses `include` for paid xAI and SuperGrok OAuth models.
+- Replayed encrypted xAI reasoning on follow-up Responses turns for `xai` and `xai-oauth`.
 
 ### Fixed