Commit 63f334baf3432c4404ddfc9e71d33bf16575f0ed | the-knife

apps/mobile/src/features/threads/use-composer-command-menu.ts+2-2

...	@@ -127,8 +127,8 @@ export function useComposerCommandMenu({	...	@@ -127,8 +127,8 @@ export function useComposerCommandMenu({
127	// Codex feedback uploads an existing thread's session and logs.	127	// Codex feedback uploads an existing thread's session and logs.
128	if (	128	if (
129	!hasThread &&	129	!hasThread &&
130	(command.name === "compact" \|\|	130	selectedProviderStatus?.driver === "codex" &&
131	(selectedProviderStatus?.driver === "codex" && command.name === "feedback"))	131	command.name === "feedback"
132	) {	132	) {
133	continue;	133	continue;
134	}	134	}

apps/server/integration/orphanedProviderSessionStartup.integration.test.ts-1

...	@@ -110,7 +110,6 @@ const startupDependencies = Layer.mergeAll(	...	@@ -110,7 +110,6 @@ const startupDependencies = Layer.mergeAll(
110	Layer.succeed(ProviderService.ProviderService, {	110	Layer.succeed(ProviderService.ProviderService, {
111	startSession: () => Effect.die("unused"),	111	startSession: () => Effect.die("unused"),
112	sendTurn: () => Effect.die("unused"),	112	sendTurn: () => Effect.die("unused"),
113	compactThread: () => Effect.die("unused"),
114	interruptTurn: () => Effect.die("unused"),	113	interruptTurn: () => Effect.die("unused"),
115	respondToRequest: () => Effect.die("unused"),	114	respondToRequest: () => Effect.die("unused"),
116	respondToUserInput: () => Effect.die("unused"),	115	respondToUserInput: () => Effect.die("unused"),

apps/server/src/orchestration/Layers/CheckpointReactor.test.ts-1

...	@@ -107,7 +107,6 @@ function createProviderServiceHarness(	...	@@ -107,7 +107,6 @@ function createProviderServiceHarness(
107	const service: ProviderServiceShape = {	107	const service: ProviderServiceShape = {
108	startSession: () => unsupported(),	108	startSession: () => unsupported(),
109	sendTurn: () => unsupported(),	109	sendTurn: () => unsupported(),
110	compactThread: () => unsupported(),
111	interruptTurn: () => unsupported(),	110	interruptTurn: () => unsupported(),
112	respondToRequest: () => unsupported(),	111	respondToRequest: () => unsupported(),
113	respondToUserInput: () => unsupported(),	112	respondToUserInput: () => unsupported(),

apps/server/src/orchestration/Layers/ProjectionPipeline.ts-15

...	@@ -1275,21 +1275,6 @@ const makeOrchestrationProjectionPipeline = Effect.fn("makeOrchestrationProjecti	...	@@ -1275,21 +1275,6 @@ const makeOrchestrationProjectionPipeline = Effect.fn("makeOrchestrationProjecti
1275	return;	1275	return;
1276	}	1276	}
1277		1277
1278	case "thread.activity-appended":
1279	if (event.payload.activity.kind !== "provider.turn.start.failed") return;
1280	const pendingTurnStart = yield* projectionTurnRepository.getPendingTurnStartByThreadId(
1281	event.payload,
1282	);
1283	if (
1284	Option.isNone(pendingTurnStart) \|\|
1285	String(pendingTurnStart.value.messageId) !==
1286	extractActivityRequestId(event.payload.activity.payload)
1287	) {
1288	return;
1289	}
1290	yield* projectionTurnRepository.deletePendingTurnStartByThreadId(event.payload);
1291	return;
1292
1293	case "thread.session-set": {	1278	case "thread.session-set": {
1294	const turnId = event.payload.session.activeTurnId;	1279	const turnId = event.payload.session.activeTurnId;
1295	if (turnId === null \|\| event.payload.session.status !== "running") {	1280	if (turnId === null \|\| event.payload.session.status !== "running") {

apps/server/src/orchestration/Layers/ProviderCommandReactor.test.ts-24

...	@@ -254,7 +254,6 @@ describe("ProviderCommandReactor", () => {	...	@@ -254,7 +254,6 @@ describe("ProviderCommandReactor", () => {
254	turnId: asTurnId("turn-1"),	254	turnId: asTurnId("turn-1"),
255	}),	255	}),
256	);	256	);
257	const compactThread = vi.fn((_: ThreadId) => Effect.void);
258	const interruptTurn = vi.fn((_: unknown) => input?.interruptTurnEffect?.() ?? Effect.void);	257	const interruptTurn = vi.fn((_: unknown) => input?.interruptTurnEffect?.() ?? Effect.void);
259	const respondToRequest = vi.fn<ProviderServiceShape["respondToRequest"]>(() => Effect.void);	258	const respondToRequest = vi.fn<ProviderServiceShape["respondToRequest"]>(() => Effect.void);
260	const respondToUserInput = vi.fn<ProviderServiceShape["respondToUserInput"]>(() => Effect.void);	259	const respondToUserInput = vi.fn<ProviderServiceShape["respondToUserInput"]>(() => Effect.void);
...	@@ -340,7 +339,6 @@ describe("ProviderCommandReactor", () => {	...	@@ -340,7 +339,6 @@ describe("ProviderCommandReactor", () => {
340	const service: ProviderServiceShape = {	339	const service: ProviderServiceShape = {
341	startSession: startSession as ProviderServiceShape["startSession"],	340	startSession: startSession as ProviderServiceShape["startSession"],
342	sendTurn: sendTurn as ProviderServiceShape["sendTurn"],	341	sendTurn: sendTurn as ProviderServiceShape["sendTurn"],
343	compactThread,
344	interruptTurn: interruptTurn as ProviderServiceShape["interruptTurn"],	342	interruptTurn: interruptTurn as ProviderServiceShape["interruptTurn"],
345	respondToRequest: respondToRequest as ProviderServiceShape["respondToRequest"],	343	respondToRequest: respondToRequest as ProviderServiceShape["respondToRequest"],
346	respondToUserInput: respondToUserInput as ProviderServiceShape["respondToUserInput"],	344	respondToUserInput: respondToUserInput as ProviderServiceShape["respondToUserInput"],
...	@@ -535,7 +533,6 @@ describe("ProviderCommandReactor", () => {	...	@@ -535,7 +533,6 @@ describe("ProviderCommandReactor", () => {
535	readModel: () => Effect.runPromise(snapshotQuery.getSnapshot()),	533	readModel: () => Effect.runPromise(snapshotQuery.getSnapshot()),
536	startSession,	534	startSession,
537	sendTurn,	535	sendTurn,
538	compactThread,
539	interruptTurn,	536	interruptTurn,
540	respondToRequest,	537	respondToRequest,
541	respondToUserInput,	538	respondToUserInput,
...	@@ -635,27 +632,6 @@ describe("ProviderCommandReactor", () => {	...	@@ -635,27 +632,6 @@ describe("ProviderCommandReactor", () => {
635	}),	632	}),
636	);	633	);
637		634
638	effectIt.effect("rejects /compact without conversation context", () =>
639	Effect.gen(function* () {
640	const harness = yield* Effect.promise(() => createHarness());
641	yield* harness.engine.dispatch({
642	type: "thread.turn.start",
643	commandId: CommandId.make("cmd-empty-compact"),
644	threadId: ThreadId.make("thread-1"),
645	message: {
646	messageId: asMessageId("user-message-empty-compact"),
647	role: "user",
648	text: "/compact",
649	attachments: [],
650	},
651	interactionMode: DEFAULT_PROVIDER_INTERACTION_MODE,
652	runtimeMode: "approval-required",
653	createdAt: "2026-01-01T00:00:00.000Z",
654	});
655	yield* Effect.promise(() => harness.drain());
656	expect(harness.compactThread).not.toHaveBeenCalled();
657	}),
658	);
659	effectIt.effect("projects starting before a slow provider session finishes", () =>	635	effectIt.effect("projects starting before a slow provider session finishes", () =>
660	Effect.gen(function* () {	636	Effect.gen(function* () {
661	const releaseStart = yield* Deferred.make<void>();	637	const releaseStart = yield* Deferred.make<void>();

apps/server/src/orchestration/Layers/ProviderCommandReactor.ts+21-96

...	@@ -30,10 +30,7 @@ import { makeDrainableWorker } from "@t3tools/shared/DrainableWorker";	...	@@ -30,10 +30,7 @@ import { makeDrainableWorker } from "@t3tools/shared/DrainableWorker";
30		30
31	import { resolveThreadWorkspaceCwd } from "../../checkpointing/Utils.ts";	31	import { resolveThreadWorkspaceCwd } from "../../checkpointing/Utils.ts";
32	import { increment, orchestrationEventsProcessedTotal } from "../../observability/Metrics.ts";	32	import { increment, orchestrationEventsProcessedTotal } from "../../observability/Metrics.ts";
33	import {	33	import { ProviderAdapterRequestError } from "../../provider/Errors.ts";
34	ProviderAdapterRequestError,
35	ProviderAdapterValidationError,
36	} from "../../provider/Errors.ts";
37	import type { ProviderServiceError } from "../../provider/Errors.ts";	34	import type { ProviderServiceError } from "../../provider/Errors.ts";
38	import { TextGeneration } from "../../textGeneration/TextGeneration.ts";	35	import { TextGeneration } from "../../textGeneration/TextGeneration.ts";
39	import { ProviderService } from "../../provider/Services/ProviderService.ts";	36	import { ProviderService } from "../../provider/Services/ProviderService.ts";
...	@@ -53,7 +50,6 @@ import {	...	@@ -53,7 +50,6 @@ import {
53	import { VcsStatusBroadcaster } from "../../vcs/VcsStatusBroadcaster.ts";	50	import { VcsStatusBroadcaster } from "../../vcs/VcsStatusBroadcaster.ts";
54	import { GitWorkflowService } from "../../git/GitWorkflowService.ts";	51	import { GitWorkflowService } from "../../git/GitWorkflowService.ts";
55	const isProviderAdapterRequestError = Schema.is(ProviderAdapterRequestError);	52	const isProviderAdapterRequestError = Schema.is(ProviderAdapterRequestError);
56	const isProviderAdapterValidationError = Schema.is(ProviderAdapterValidationError);
57	const isProviderDriverKind = Schema.is(ProviderDriverKind);	53	const isProviderDriverKind = Schema.is(ProviderDriverKind);
58		54
59	type ProviderIntentEvent = Extract<	55	type ProviderIntentEvent = Extract<
...	@@ -76,10 +72,6 @@ function toNonEmptyProviderInput(value: string \| undefined): string \| undefined	...	@@ -76,10 +72,6 @@ function toNonEmptyProviderInput(value: string \| undefined): string \| undefined
76	return normalized && normalized.length > 0 ? normalized : undefined;	72	return normalized && normalized.length > 0 ? normalized : undefined;
77	}	73	}
78		74
79	const isCompactCommandMessage = (message: ThreadTitleMessage): boolean =>
80	message.role === "user" &&
81	(message.attachments?.length ?? 0) === 0 &&
82	message.text.trim().toLowerCase() === "/compact";
83	function mapProviderSessionStatusToOrchestrationStatus(	75	function mapProviderSessionStatusToOrchestrationStatus(
84	status: "connecting" \| "ready" \| "running" \| "error" \| "closed",	76	status: "connecting" \| "ready" \| "running" \| "error" \| "closed",
85	): OrchestrationSession["status"] {	77	): OrchestrationSession["status"] {
...	@@ -340,7 +332,6 @@ const make = Effect.gen(function* () {	...	@@ -340,7 +332,6 @@ const make = Effect.gen(function* () {
340	);	332	);
341		333
342	const threadModelSelections = new Map<string, ModelSelection>();	334	const threadModelSelections = new Map<string, ModelSelection>();
343	const compactingThreadIds = new Set<ThreadId>();
344		335
345	const appendProviderFailureActivity = (input: {	336	const appendProviderFailureActivity = (input: {
346	readonly threadId: ThreadId;	337	readonly threadId: ThreadId;
...	@@ -384,11 +375,11 @@ const make = Effect.gen(function* () {	...	@@ -384,11 +375,11 @@ const make = Effect.gen(function* () {
384		375
385	const formatFailureDetail = (cause: Cause.Cause<unknown>): string => {	376	const formatFailureDetail = (cause: Cause.Cause<unknown>): string => {
386	const failReason = cause.reasons.find(Cause.isFailReason);	377	const failReason = cause.reasons.find(Cause.isFailReason);
387	if (isProviderAdapterRequestError(failReason?.error)) {	378	const providerError = isProviderAdapterRequestError(failReason?.error)
388	return failReason.error.detail;	379	? failReason.error
389	}	380	: undefined;
390	if (isProviderAdapterValidationError(failReason?.error)) {	381	if (providerError) {
391	return failReason.error.issue;	382	return providerError.detail;
392	}	383	}
393	return Cause.pretty(cause);	384	return Cause.pretty(cause);
394	};	385	};
...	@@ -1146,6 +1137,7 @@ const make = Effect.gen(function* () {	...	@@ -1146,6 +1137,7 @@ const make = Effect.gen(function* () {
1146	if (!thread) {	1137	if (!thread) {
1147	return;	1138	return;
1148	}	1139	}
		1140
1149	const message = thread.messages.find((entry) => entry.id === event.payload.messageId);	1141	const message = thread.messages.find((entry) => entry.id === event.payload.messageId);
1150	if (!message \|\| message.role !== "user") {	1142	if (!message \|\| message.role !== "user") {
1151	yield* appendProviderFailureActivity({	1143	yield* appendProviderFailureActivity({
...	@@ -1155,28 +1147,15 @@ const make = Effect.gen(function* () {	...	@@ -1155,28 +1147,15 @@ const make = Effect.gen(function* () {
1155	detail: `User message '${event.payload.messageId}' was not found for turn start request.`,	1147	detail: `User message '${event.payload.messageId}' was not found for turn start request.`,
1156	turnId: null,	1148	turnId: null,
1157	createdAt: event.payload.createdAt,	1149	createdAt: event.payload.createdAt,
1158	requestId: event.payload.messageId,
1159	});	1150	});
1160	return;	1151	return;
1161	}	1152	}
1162	const appendTurnStartFailure = (summary: string, detail: string) =>
1163	appendProviderFailureActivity({
1164	threadId: event.payload.threadId,
1165	kind: "provider.turn.start.failed",
1166	summary,
1167	detail,
1168	turnId: null,
1169	createdAt: event.payload.createdAt,
1170	requestId: event.payload.messageId,
1171	});
1172		1153
1173	yield* ensureThreadWorktree(thread);	1154	yield* ensureThreadWorktree(thread);
1174		1155
1175	const isCompactCommand = isCompactCommandMessage(message);	1156	const isFirstUserMessageTurn =
1176	const nonCompactUserMessageCount = thread.messages.filter(	1157	thread.messages.filter((entry) => entry.role === "user").length === 1;
1177	(entry) => entry.role === "user" && !isCompactCommandMessage(entry),	1158	if (isFirstUserMessageTurn) {
1178	).length;
1179	if (nonCompactUserMessageCount === 1 && !isCompactCommand) {
1180	const project = yield* resolveProject(thread.projectId);	1159	const project = yield* resolveProject(thread.projectId);
1181	const generationCwd =	1160	const generationCwd =
1182	resolveThreadWorkspaceCwd({	1161	resolveThreadWorkspaceCwd({
...	@@ -1215,7 +1194,16 @@ const make = Effect.gen(function* () {	...	@@ -1215,7 +1194,16 @@ const make = Effect.gen(function* () {
1215	detail,	1194	detail,
1216	createdAt: event.payload.createdAt,	1195	createdAt: event.payload.createdAt,
1217	}).pipe(	1196	}).pipe(
1218	Effect.flatMap(() => appendTurnStartFailure("Provider turn start failed", detail)),	1197	Effect.flatMap(() =>
		1198	appendProviderFailureActivity({
		1199	threadId: event.payload.threadId,
		1200	kind: "provider.turn.start.failed",
		1201	summary: "Provider turn start failed",
		1202	detail,
		1203	turnId: null,
		1204	createdAt: event.payload.createdAt,
		1205	}),
		1206	),
1219	Effect.asVoid,	1207	Effect.asVoid,
1220	);	1208	);
1221	};	1209	};
...	@@ -1232,69 +1220,6 @@ const make = Effect.gen(function* () {	...	@@ -1232,69 +1220,6 @@ const make = Effect.gen(function* () {
1232	),	1220	),
1233	);	1221	);
1234		1222
1235	const handleCompactionFailure = (cause: Cause.Cause<unknown>) => {
1236	if (Cause.hasInterruptsOnly(cause)) {
1237	return Effect.void;
1238	}
1239	const detail = formatFailureDetail(cause);
1240	return appendTurnStartFailure("Context compaction failed", detail).pipe(Effect.asVoid);
1241	};
1242	const recoverCompactionFailure = (cause: Cause.Cause<unknown>) =>
1243	handleCompactionFailure(cause).pipe(
1244	Effect.catchCause((recoveryCause) =>
1245	Effect.logWarning("provider command reactor failed to recover compaction failure", {
1246	eventType: event.type,
1247	threadId: event.payload.threadId,
1248	cause: Cause.pretty(recoveryCause),
1249	originalCause: Cause.pretty(cause),
1250	}),
1251	),
1252	);
1253	if (isCompactCommand) {
1254	if (nonCompactUserMessageCount === 0) {
1255	return yield* appendTurnStartFailure(
1256	"Context compaction failed",
1257	"Context compaction requires an existing conversation.",
1258	);
1259	}
1260	const latestThread = yield* resolveThread(event.payload.threadId);
1261	if (
1262	compactingThreadIds.has(event.payload.threadId) \|\|
1263	latestThread?.session?.status === "starting" \|\|
1264	latestThread?.session?.status === "running"
1265	) {
1266	yield* appendTurnStartFailure(
1267	"Context compaction failed",
1268	"Context compaction is unavailable while a provider turn is running.",
1269	);
1270	return;
1271	}
1272	compactingThreadIds.add(event.payload.threadId);
1273	yield* Effect.gen(function* () {
1274	yield* ensureSessionForThread(
1275	event.payload.threadId,
1276	event.payload.createdAt,
1277	event.payload.modelSelection !== undefined
1278	? { modelSelection: event.payload.modelSelection }
1279	: undefined,
1280	);
1281	if (event.payload.modelSelection !== undefined) {
1282	threadModelSelections.set(event.payload.threadId, event.payload.modelSelection);
1283	}
1284	yield* providerService.compactThread(event.payload.threadId, event.payload.modelSelection);
1285	}).pipe(
1286	Effect.catchCause(recoverCompactionFailure),
1287	Effect.ensuring(Effect.sync(() => void compactingThreadIds.delete(event.payload.threadId))),
1288	Effect.forkScoped,
1289	);
1290	return;
1291	}
1292	if (compactingThreadIds.has(event.payload.threadId)) {
1293	return yield* appendTurnStartFailure(
1294	"Provider turn start failed",
1295	"Wait for context compaction to finish before sending another message.",
1296	);
1297	}
1298	const sendTurnRequest = yield* buildSendTurnRequestForThread({	1223	const sendTurnRequest = yield* buildSendTurnRequestForThread({
1299	threadId: event.payload.threadId,	1224	threadId: event.payload.threadId,
1300	messageText: message.text,	1225	messageText: message.text,
...	@@ -1315,7 +1240,7 @@ const make = Effect.gen(function* () {	...	@@ -1315,7 +1240,7 @@ const make = Effect.gen(function* () {
1315		1240
1316	yield* providerService	1241	yield* providerService
1317	.sendTurn(sendTurnRequest.value)	1242	.sendTurn(sendTurnRequest.value)
1318	.pipe(Effect.asVoid, Effect.catchCause(recoverTurnStartFailure), Effect.forkScoped);	1243	.pipe(Effect.catchCause(recoverTurnStartFailure), Effect.forkScoped);
1319	});	1244	});
1320		1245
1321	const processTurnInterruptRequested = Effect.fn("processTurnInterruptRequested")(function* (	1246	const processTurnInterruptRequested = Effect.fn("processTurnInterruptRequested")(function* (

apps/server/src/orchestration/Layers/ProviderRuntimeIngestion.test.ts+1-4

apps/server/src/orchestration/Layers/ProviderRuntimeIngestion.ts+1-10

 @@ -28,7 +28,6 @@ import * as Layer from "effect/Layer";
 import * as Option from "effect/Option";
 import * as Stream from "effect/Stream";
 import { makeDrainableWorker } from "@t3tools/shared/DrainableWorker";
-import { formatTokens } from "@t3tools/shared/usageFormat";
 import { ProviderService } from "../../provider/Services/ProviderService.ts";
 import { ProjectionTurnRepository } from "../../persistence/Services/ProjectionTurns.ts";
 @@ -754,23 +753,15 @@ export function runtimeEventToActivities(
         return [];
       }
-      const beforeTokens = event.payload.beforeTokens;
-      const afterTokens = event.payload.afterTokens;
-      const summary =
-        beforeTokens !== undefined && afterTokens !== undefined
-          ? `Compacted context ${formatTokens(beforeTokens)} → ${formatTokens(afterTokens)} tokens`
-          : "Context compacted";
       return [
         {
           id: event.eventId,
           createdAt: event.createdAt,
           tone: "info",
           kind: "context-compaction",
-          summary,
+          summary: "Context compacted",
           payload: {
             state: event.payload.state,
-            ...(beforeTokens !== undefined ? { beforeTokens } : {}),
-            ...(afterTokens !== undefined ? { afterTokens } : {}),
             ...(event.payload.detail !== undefined ? { detail: event.payload.detail } : {}),
           },
           turnId: toTurnId(event.turnId) ?? null,

apps/server/src/provider/Layers/ClaudeAdapter.test.ts+6-7

 @@ -729,7 +729,12 @@ describe("ClaudeAdapterLive", () => {
         runtimeMode: "full-access",
       });
-      yield* adapter.compactThread!(session.threadId, modelSelection);
+      yield* adapter.sendTurn({
+        threadId: session.threadId,
+        input: "/compact",
+        attachments: [],
+        modelSelection,
+      });
       const promptText = yield* Effect.promise(() =>
         readFirstPromptText(harness.getLastCreateQueryInput()),
 @@ -2227,12 +2232,6 @@ describe("ClaudeAdapterLive", () => {
       } as unknown as SDKMessage);
       const runtimeEvents = Array.from(yield* Fiber.join(runtimeEventsFiber));
-      const compactionEvent = runtimeEvents.find(
-        (event) => event.type === "thread.state.changed" && event.payload.state === "compacted",
-      );
-      assert.ok(compactionEvent?.type === "thread.state.changed");
-      assert.equal(compactionEvent.payload.beforeTokens, 200);
-      assert.equal(compactionEvent.payload.afterTokens, 40);
       const finalUsageEvent = runtimeEvents.findLast(
         (event) => event.type === "thread.token-usage.updated",
       );

apps/server/src/provider/Layers/ClaudeAdapter.ts+13-28

 @@ -3198,36 +3198,32 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
           },
         });
         return;
-      case "compact_boundary": {
+      case "compact_boundary":
         if (context.turnState) {
           context.turnState.latestAssistantUsage = undefined;
           context.turnState.compactedSinceLatestAssistantUsage = true;
         }
-        const compactedUsage = compactBoundaryTokenUsageSnapshot(
+        yield* emitThreadTokenUsage(
-          message as unknown as Record<string, unknown>,
+          context,
-          context.lastKnownContextWindow,
+          compactBoundaryTokenUsageSnapshot(
-          context.lastKnownTotalProcessedTokens,
+            message as unknown as Record<string, unknown>,
+            context.lastKnownContextWindow,
+            context.lastKnownTotalProcessedTokens,
+          ),
+          {
+            rawMethod: "claude/system/compact_boundary",
+            rawPayload: message,
+          },
         );
-        yield* emitThreadTokenUsage(context, compactedUsage, {
-          rawMethod: "claude/system/compact_boundary",
-          rawPayload: message,
-        });
         yield* offerRuntimeEvent({
           ...base,
           type: "thread.state.changed",
           payload: {
             state: "compacted",
-            ...(compactedUsage?.lastUsedTokens !== undefined
-              ? { beforeTokens: compactedUsage.lastUsedTokens }
-              : {}),
-            ...(compactedUsage?.usedTokens !== undefined
-              ? { afterTokens: compactedUsage.usedTokens }
-              : {}),
             detail: message,
           },
         });
         return;
-      }
       case "hook_started":
         yield* offerRuntimeEvent({
           ...base,
 @@ -3786,7 +3782,7 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
     // Same reason as the approvals above: a request nobody can answer any more
     // must not stay open, or the thread can never be settled.
-    for (const pending of context.pendingUserInputs.values()) {
+    for (const pending of [...context.pendingUserInputs.values()]) {
       yield* pending.cancel;
     }
 @@ -4694,16 +4690,6 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
     };
   });
-  const compactThread: NonNullable<ClaudeAdapterShape["compactThread"]> = (
-    threadId,
-    modelSelection,
-  ) =>
-    sendTurn({
-      threadId,
-      input: "/compact",
-      ...(modelSelection !== undefined ? { modelSelection } : {}),
-    }).pipe(Effect.asVoid);
   const interruptTurn: ClaudeAdapterShape["interruptTurn"] = Effect.fn("interruptTurn")(
     function* (threadId, _turnId) {
       const context = yield* requireSession(threadId);
 @@ -4818,7 +4804,6 @@ export const makeClaudeAdapter = Effect.fn("makeClaudeAdapter")(function* (
     },
     startSession,
     sendTurn,
-    compactThread,
     interruptTurn,
     readThread,
     rollbackThread,

apps/server/src/provider/Layers/ClaudeProvider.ts+7-2

 @@ -22,7 +22,6 @@ import {
 import {
   buildServerProvider,
-  COMPACT_SLASH_COMMAND,
   DEFAULT_TIMEOUT_MS,
   isCommandMissingCause,
   parseGenericCliVersion,
 @@ -504,7 +503,13 @@ export const checkClaudeProviderStatus = Effect.fn("checkClaudeProviderStatus")(
     ? yield* resolveCapabilities(claudeSettings).pipe(Effect.orElseSucceed(() => undefined))
     : undefined;
   const skills = yield* discoverClaudeSkills(claudeSettings, cwd, resolvedEnvironment);
-  const slashCommands = [COMPACT_SLASH_COMMAND, ...(capabilities?.slashCommands ?? [])];
+  const slashCommands = [
+    {
+      name: "compact",
+      description: "Summarize the conversation and reduce context usage",
+    },
+    ...(capabilities?.slashCommands ?? []),
+  ];
   const dedupedSlashCommands = dedupeSlashCommands(slashCommands);
   if (!capabilities) {

apps/server/src/provider/Layers/CodexAdapter.test.ts-43

...	@@ -84,8 +84,6 @@ class FakeCodexRuntime implements CodexSessionRuntimeShape {	...	@@ -84,8 +84,6 @@ class FakeCodexRuntime implements CodexSessionRuntimeShape {
84	}),	84	}),
85	);	85	);
86		86
87	public readonly compactThread = Effect.void;
88
89	public readonly interruptTurnImpl = vi.fn(	87	public readonly interruptTurnImpl = vi.fn(
90	(_turnId?: TurnId): Promise<void> => Promise.resolve(undefined),	88	(_turnId?: TurnId): Promise<void> => Promise.resolve(undefined),
91	);	89	);
...	@@ -338,47 +336,6 @@ sessionErrorLayer("CodexAdapterLive session errors", (it) => {	...	@@ -338,47 +336,6 @@ sessionErrorLayer("CodexAdapterLive session errors", (it) => {
338	}),	336	}),
339	);	337	);
340		338
341	it.effect("compacts the active Codex thread and emits compacted state", () =>
342	Effect.gen(function* () {
343	const adapter = yield* CodexAdapter;
344	const threadId = asThreadId("thread-compact");
345	yield* adapter.startSession({
346	provider: ProviderDriverKind.make("codex"),
347	threadId,
348	runtimeMode: "full-access",
349	});
350	const runtime = sessionRuntimeFactory.lastRuntime;
351	NodeAssert.ok(runtime);
352	const compactedEventFiber = yield* adapter.streamEvents.pipe(
353	Stream.filter((event) => event.type === "thread.state.changed"),
354	Stream.runHead,
355	Effect.forkChild,
356	);
357	yield* adapter.compactThread!(threadId);
358	yield* runtime.emit({
359	id: asEventId("evt-compaction-item-completed"),
360	kind: "notification",
361	provider: ProviderDriverKind.make("codex"),
362	createdAt: "2026-01-01T00:00:00.000Z",
363	method: "item/completed",
364	threadId,
365	payload: {
366	completedAtMs: 1_778_000_000_000,
367	threadId: "provider-thread-1",
368	turnId: "provider-compact-turn",
369	item: {
370	id: "provider-compact-item",
371	type: "contextCompaction",
372	},
373	},
374	});
375	const event = Option.getOrThrow(yield* Fiber.join(compactedEventFiber));
376	NodeAssert.ok(event.type === "thread.state.changed");
377	NodeAssert.equal(event.payload.state, "compacted");
378	yield* adapter.stopSession(threadId);
379	}),
380	);
381
382	it.effect("uploads feedback for the active Codex thread", () =>	339	it.effect("uploads feedback for the active Codex thread", () =>
383	Effect.gen(function* () {	340	Effect.gen(function* () {
384	const adapter = yield* CodexAdapter;	341	const adapter = yield* CodexAdapter;

apps/server/src/provider/Layers/CodexAdapter.ts+1-23

...	@@ -11,7 +11,6 @@ import {	...	@@ -11,7 +11,6 @@ import {
11	type CanonicalItemType,	11	type CanonicalItemType,
12	type CanonicalRequestType,	12	type CanonicalRequestType,
13	type CodexSettings,	13	type CodexSettings,
14	EventId,
15	ProviderDriverKind,	14	ProviderDriverKind,
16	type ProviderEvent,	15	type ProviderEvent,
17	ProviderInstanceId,	16	ProviderInstanceId,
...	@@ -1152,18 +1151,7 @@ function mapToRuntimeEvents(	...	@@ -1152,18 +1151,7 @@ function mapToRuntimeEvents(
1152	];	1151	];
1153	}	1152	}
1154	const completed = mapItemLifecycle(event, canonicalThreadId, "item.completed");	1153	const completed = mapItemLifecycle(event, canonicalThreadId, "item.completed");
1155	if (!completed \|\| itemType !== "context_compaction") {	1154	return completed ? [completed] : [];
1156	return completed ? [completed] : [];
1157	}
1158	return [
1159	completed,
1160	{
1161	...runtimeEventBase(event, canonicalThreadId),
1162	eventId: EventId.make(`${event.id}:thread-compacted`),
1163	type: "thread.state.changed",
1164	payload: { state: "compacted" },
1165	},
1166	];
1167	}	1155	}
1168		1156
1169	if (	1157	if (
...	@@ -1891,15 +1879,6 @@ export const makeCodexAdapter = Effect.fn("makeCodexAdapter")(function* (	...	@@ -1891,15 +1879,6 @@ export const makeCodexAdapter = Effect.fn("makeCodexAdapter")(function* (
1891	),	1879	),
1892	);	1880	);
1893		1881
1894	const compactThread: NonNullable<CodexAdapterShape["compactThread"]> = Effect.fn("compactThread")(
1895	function* (threadId) {
1896	const session = yield* requireSession(threadId);
1897	yield* session.runtime.compactThread.pipe(
1898	Effect.mapError((cause) => mapCodexRuntimeError(threadId, "thread/compact/start", cause)),
1899	);
1900	},
1901	);
1902
1903	const readThread: CodexAdapterShape["readThread"] = (threadId) =>	1882	const readThread: CodexAdapterShape["readThread"] = (threadId) =>
1904	requireSession(threadId).pipe(	1883	requireSession(threadId).pipe(
1905	Effect.flatMap((session) => session.runtime.readThread),	1884	Effect.flatMap((session) => session.runtime.readThread),
...	@@ -2035,7 +2014,6 @@ export const makeCodexAdapter = Effect.fn("makeCodexAdapter")(function* (	...	@@ -2035,7 +2014,6 @@ export const makeCodexAdapter = Effect.fn("makeCodexAdapter")(function* (
2035	},	2014	},
2036	startSession,	2015	startSession,
2037	sendTurn,	2016	sendTurn,
2038	compactThread,
2039	interruptTurn,	2017	interruptTurn,
2040	readThread,	2018	readThread,
2041	rollbackThread,	2019	rollbackThread,

apps/server/src/provider/Layers/CodexProvider.ts-2

...	@@ -30,7 +30,6 @@ import { codexAppServerArgs, resolveCodexLaunchArgs } from "./codexLaunchArgs.ts	...	@@ -30,7 +30,6 @@ import { codexAppServerArgs, resolveCodexLaunchArgs } from "./codexLaunchArgs.ts
30	import {	30	import {
31	AUTH_PROBE_TIMEOUT_MS,	31	AUTH_PROBE_TIMEOUT_MS,
32	buildServerProvider,	32	buildServerProvider,
33	COMPACT_SLASH_COMMAND,
34	type ServerProviderDraft,	33	type ServerProviderDraft,
35	} from "../providerSnapshot.ts";	34	} from "../providerSnapshot.ts";
36	import { expandHomePath } from "../../pathExpansion.ts";	35	import { expandHomePath } from "../../pathExpansion.ts";
...	@@ -649,7 +648,6 @@ export const checkCodexProviderStatus = Effect.fn("checkCodexProviderStatus")(fu	...	@@ -649,7 +648,6 @@ export const checkCodexProviderStatus = Effect.fn("checkCodexProviderStatus")(fu
649	models: snapshot.models,	648	models: snapshot.models,
650	skills: snapshot.skills,	649	skills: snapshot.skills,
651	slashCommands: [	650	slashCommands: [
652	COMPACT_SLASH_COMMAND,
653	{	651	{
654	name: "feedback",	652	name: "feedback",
655	description: "Send this thread and Codex logs to OpenAI",	653	description: "Send this thread and Codex logs to OpenAI",

apps/server/src/provider/Layers/CodexSessionRuntime.ts-5

...	@@ -196,7 +196,6 @@ export interface CodexSessionRuntimeShape {	...	@@ -196,7 +196,6 @@ export interface CodexSessionRuntimeShape {
196	readonly sendTurn: (	196	readonly sendTurn: (
197	input: CodexSessionRuntimeSendTurnInput,	197	input: CodexSessionRuntimeSendTurnInput,
198	) => Effect.Effect<ProviderTurnStartResult, CodexSessionRuntimeError>;	198	) => Effect.Effect<ProviderTurnStartResult, CodexSessionRuntimeError>;
199	readonly compactThread: Effect.Effect<void, CodexSessionRuntimeError>;
200	readonly interruptTurn: (turnId?: TurnId) => Effect.Effect<void, CodexSessionRuntimeError>;	199	readonly interruptTurn: (turnId?: TurnId) => Effect.Effect<void, CodexSessionRuntimeError>;
201	readonly readThread: Effect.Effect<CodexThreadSnapshot, CodexSessionRuntimeError>;	200	readonly readThread: Effect.Effect<CodexThreadSnapshot, CodexSessionRuntimeError>;
202	readonly rollbackThread: (	201	readonly rollbackThread: (
...	@@ -2294,10 +2293,6 @@ export const makeCodexSessionRuntime = (	...	@@ -2294,10 +2293,6 @@ export const makeCodexSessionRuntime = (
2294	return {	2293	return {
2295	start,	2294	start,
2296	getSession: Ref.get(sessionRef),	2295	getSession: Ref.get(sessionRef),
2297	compactThread: Effect.gen(function* () {
2298	const providerThreadId = yield* readProviderThreadId;
2299	yield* client.request("thread/compact/start", { threadId: providerThreadId });
2300	}),
2301	sendTurn: (input) =>	2296	sendTurn: (input) =>
2302	Effect.gen(function* () {	2297	Effect.gen(function* () {
2303	const providerThreadId = yield* readProviderThreadId;	2298	const providerThreadId = yield* readProviderThreadId;

apps/server/src/provider/Layers/CursorProvider.ts-2

...	@@ -34,7 +34,6 @@ import {	...	@@ -34,7 +34,6 @@ import {
34	buildBooleanOptionDescriptor,	34	buildBooleanOptionDescriptor,
35	buildSelectOptionDescriptor,	35	buildSelectOptionDescriptor,
36	buildServerProvider,	36	buildServerProvider,
37	COMPACT_SLASH_COMMAND,
38	collectStreamAsString,	37	collectStreamAsString,
39	isCommandMissingCause,	38	isCommandMissingCause,
40	providerModelsFromSettings,	39	providerModelsFromSettings,
...	@@ -640,7 +639,6 @@ export function buildCursorProviderSnapshot(input: {	...	@@ -640,7 +639,6 @@ export function buildCursorProviderSnapshot(input: {
640	input.cursorSettings.customModels,	639	input.cursorSettings.customModels,
641	EMPTY_CAPABILITIES,	640	EMPTY_CAPABILITIES,
642	),	641	),
643	slashCommands: [COMPACT_SLASH_COMMAND],
644	probe: {	642	probe: {
645	installed: true,	643	installed: true,
646	version: input.parsed.version,	644	version: input.parsed.version,

apps/server/src/provider/Layers/GrokProvider.ts-2

...	@@ -21,7 +21,6 @@ import { resolveSpawnCommand } from "@t3tools/shared/shell";	...	@@ -21,7 +21,6 @@ import { resolveSpawnCommand } from "@t3tools/shared/shell";
21	import {	21	import {
22	AUTH_PROBE_TIMEOUT_MS,	22	AUTH_PROBE_TIMEOUT_MS,
23	buildServerProvider,	23	buildServerProvider,
24	COMPACT_SLASH_COMMAND,
25	isCommandMissingCause,	24	isCommandMissingCause,
26	parseGenericCliVersion,	25	parseGenericCliVersion,
27	providerModelsFromSettings,	26	providerModelsFromSettings,
...	@@ -497,7 +496,6 @@ export const checkGrokProviderStatus = Effect.fn("checkGrokProviderStatus")(func	...	@@ -497,7 +496,6 @@ export const checkGrokProviderStatus = Effect.fn("checkGrokProviderStatus")(func
497	checkedAt,	496	checkedAt,
498	models,	497	models,
499	skills,	498	skills,
500	slashCommands: [COMPACT_SLASH_COMMAND],
501	probe: {	499	probe: {
502	installed: true,	500	installed: true,
503	version,	501	version,

apps/server/src/provider/Layers/OpenCodeAdapter.test.ts-39

...	@@ -79,7 +79,6 @@ const runtimeMock = {	...	@@ -79,7 +79,6 @@ const runtimeMock = {
79	messageCalls: [] as Array<{ sessionID: string; messageID: string }>,	79	messageCalls: [] as Array<{ sessionID: string; messageID: string }>,
80	messageFailures: 0,	80	messageFailures: 0,
81	promptCalls: [] as Array<unknown>,	81	promptCalls: [] as Array<unknown>,
82	summarizeCalls: [] as Array<unknown>,
83	promptAsyncError: null as Error \| null,	82	promptAsyncError: null as Error \| null,
84	promptAsyncImplementation: null as (() => Promise<void>) \| null,	83	promptAsyncImplementation: null as (() => Promise<void>) \| null,
85	autoPromptEcho: true,	84	autoPromptEcho: true,
...	@@ -130,7 +129,6 @@ const runtimeMock = {	...	@@ -130,7 +129,6 @@ const runtimeMock = {
130	this.state.messageCalls.length = 0;	129	this.state.messageCalls.length = 0;
131	this.state.messageFailures = 0;	130	this.state.messageFailures = 0;
132	this.state.promptCalls.length = 0;	131	this.state.promptCalls.length = 0;
133	this.state.summarizeCalls.length = 0;
134	this.state.promptAsyncError = null;	132	this.state.promptAsyncError = null;
135	this.state.promptAsyncImplementation = null;	133	this.state.promptAsyncImplementation = null;
136	this.state.autoPromptEcho = true;	134	this.state.autoPromptEcho = true;
...	@@ -315,10 +313,6 @@ const OpenCodeRuntimeTestDouble: OpenCodeRuntimeShape = {	...	@@ -315,10 +313,6 @@ const OpenCodeRuntimeTestDouble: OpenCodeRuntimeShape = {
315	});	313	});
316	}	314	}
317	},	315	},
318	summarize: async (input: unknown) => {
319	runtimeMock.state.summarizeCalls.push(input);
320	return { data: true };
321	},
322	messages: async () => ({ data: runtimeMock.state.messages }),	316	messages: async () => ({ data: runtimeMock.state.messages }),
323	message: async ({ sessionID, messageID }: { sessionID: string; messageID: string }) => {	317	message: async ({ sessionID, messageID }: { sessionID: string; messageID: string }) => {
324	runtimeMock.state.messageCalls.push({ sessionID, messageID });	318	runtimeMock.state.messageCalls.push({ sessionID, messageID });
...	@@ -955,39 +949,6 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {	...	@@ -955,39 +949,6 @@ it.layer(OpenCodeAdapterTestLayer)("OpenCodeAdapterLive", (it) => {
955	}),	949	}),
956	);	950	);
957		951
958	it.effect("compacts through the native OpenCode session API", () =>
959	Effect.gen(function* () {
960	const adapter = yield* OpenCodeAdapter;
961	const threadId = asThreadId("thread-opencode-compact");
962	runtimeMock.state.subscribedEvents.push({
963	type: "session.compacted",
964	properties: { sessionID: "http://127.0.0.1:9999/session" },
965	});
966	const eventsFiber = yield* adapter.streamEvents.pipe(
967	Stream.filter((event) => event.threadId === threadId),
968	Stream.take(3),
969	Stream.runCollect,
970	Effect.forkChild,
971	);
972	yield* adapter.startSession({
973	provider: ProviderDriverKind.make("opencode"),
974	threadId,
975	runtimeMode: "full-access",
976	});
977	yield* adapter.compactThread!(
978	threadId,
979	createModelSelection(ProviderInstanceId.make("opencode"), "openai/gpt-5"),
980	);
981	const summarizeCall = runtimeMock.state.summarizeCalls[0] as Record<string, unknown>;
982	NodeAssert.equal(summarizeCall.modelID, "gpt-5");
983	const events = Array.from(yield* Fiber.join(eventsFiber));
984	yield* adapter.stopSession(threadId);
985	const compacted = events.some(
986	(event) => event.type === "thread.state.changed" && event.payload.state === "compacted",
987	);
988	NodeAssert.equal(compacted, true);
989	}),
990	);
991	it.effect("falls back to a fresh session when the persisted session is gone", () =>	952	it.effect("falls back to a fresh session when the persisted session is gone", () =>
992	Effect.gen(function* () {	953	Effect.gen(function* () {
993	const adapter = yield* OpenCodeAdapter;	954	const adapter = yield* OpenCodeAdapter;

apps/server/src/provider/Layers/OpenCodeAdapter.ts-81

...	@@ -2014,21 +2014,6 @@ export function makeOpenCodeAdapter(	...	@@ -2014,21 +2014,6 @@ export function makeOpenCodeAdapter(
2014	}	2014	}
2015	break;	2015	break;
2016	}	2016	}
2017	case "session.compacted": {
2018	yield* emit({
2019	...(yield* buildEventBase({
2020	threadId: context.session.threadId,
2021	turnId,
2022	raw: event,
2023	})),
2024	type: "thread.state.changed",
2025	payload: {
2026	state: "compacted",
2027	detail: event,
2028	},
2029	});
2030	break;
2031	}
2032		2017
2033	case "message.updated": {	2018	case "message.updated": {
2034	const promptAdmission = context.promptAdmission;	2019	const promptAdmission = context.promptAdmission;
...	@@ -2999,71 +2984,6 @@ export function makeOpenCodeAdapter(	...	@@ -2999,71 +2984,6 @@ export function makeOpenCodeAdapter(
2999	);	2984	);
3000	});	2985	});
3001		2986
3002	const compactThread: NonNullable<OpenCodeAdapterShape["compactThread"]> = Effect.fn(
3003	"compactThread",
3004	)(function* (threadId, requestedModelSelection) {
3005	const context = yield* ensureSessionContext(sessions, threadId);
3006	yield* awaitOpenCodeContextReady(context);
3007	const modelSelection =
3008	requestedModelSelection ??
3009	(context.session.model
3010	? { instanceId: boundInstanceId, model: context.session.model }
3011	: undefined);
3012	if (modelSelection !== undefined && modelSelection.instanceId !== boundInstanceId) {
3013	return yield* new ProviderAdapterValidationError({
3014	provider: PROVIDER,
3015	operation: "compactThread",
3016	issue: `OpenCode model selection is bound to instance '${modelSelection.instanceId}', expected '${boundInstanceId}'.`,
3017	});
3018	}
3019	const parsedModel = parseOpenCodeModelSlug(modelSelection?.model);
3020	if (!parsedModel) {
3021	return yield* new ProviderAdapterValidationError({
3022	provider: PROVIDER,
3023	operation: "compactThread",
3024	issue: "OpenCode compaction requires an active 'provider/model' selection.",
3025	});
3026	}
3027	yield* context.promptSemaphore.withPermit(
3028	Effect.gen(function* () {
3029	if (sessions.get(threadId) !== context \|\| (yield* Ref.get(context.stopped))) {
3030	return yield* Effect.interrupt;
3031	}
3032	if (context.activeTurnId !== undefined) {
3033	return yield* new ProviderAdapterValidationError({
3034	provider: PROVIDER,
3035	operation: "compactThread",
3036	issue: "OpenCode cannot compact while a turn is running.",
3037	});
3038	}
3039	yield* runOpenCodeSdk("session.summarize", (signal) =>
3040	context.client.session.summarize(
3041	{
3042	sessionID: context.openCodeSessionId,
3043	...parsedModel,
3044	auto: false,
3045	},
3046	{ signal },
3047	),
3048	).pipe(
3049	Effect.timeout("10 minutes"),
3050	Effect.catchTags({
3051	OpenCodeRuntimeError: (cause) => Effect.fail(toRequestError(cause)),
3052	TimeoutError: (cause) =>
3053	Effect.fail(
3054	new ProviderAdapterRequestError({
3055	provider: PROVIDER,
3056	method: "session.summarize",
3057	detail: "OpenCode session compaction did not complete within 10 minutes.",
3058	cause,
3059	}),
3060	),
3061	}),
3062	Effect.asVoid,
3063	);
3064	}),
3065	);
3066	});
3067	const interruptTurn: OpenCodeAdapterShape["interruptTurn"] = Effect.fn("interruptTurn")(	2987	const interruptTurn: OpenCodeAdapterShape["interruptTurn"] = Effect.fn("interruptTurn")(
3068	function* (threadId, turnId) {	2988	function* (threadId, turnId) {
3069	const context = yield* ensureSessionContext(sessions, threadId);	2989	const context = yield* ensureSessionContext(sessions, threadId);
...	@@ -3348,7 +3268,6 @@ export function makeOpenCodeAdapter(	...	@@ -3348,7 +3268,6 @@ export function makeOpenCodeAdapter(
3348	},	3268	},
3349	startSession,	3269	startSession,
3350	sendTurn,	3270	sendTurn,
3351	compactThread,
3352	interruptTurn,	3271	interruptTurn,
3353	respondToRequest,	3272	respondToRequest,
3354	respondToUserInput,	3273	respondToUserInput,

apps/server/src/provider/Layers/OpenCodeProvider.ts-2

...	@@ -13,7 +13,6 @@ import { createModelCapabilities } from "@t3tools/shared/model";	...	@@ -13,7 +13,6 @@ import { createModelCapabilities } from "@t3tools/shared/model";
13	import { compareSemverVersions } from "@t3tools/shared/semver";	13	import { compareSemverVersions } from "@t3tools/shared/semver";
14	import {	14	import {
15	buildServerProvider,	15	buildServerProvider,
16	COMPACT_SLASH_COMMAND,
17	nonEmptyTrimmed,	16	nonEmptyTrimmed,
18	parseGenericCliVersion,	17	parseGenericCliVersion,
19	providerModelsFromSettings,	18	providerModelsFromSettings,
...	@@ -496,7 +495,6 @@ export const checkOpenCodeProviderStatus = Effect.fn("checkOpenCodeProviderStatu	...	@@ -496,7 +495,6 @@ export const checkOpenCodeProviderStatus = Effect.fn("checkOpenCodeProviderStatu
496	checkedAt,	495	checkedAt,
497	models,	496	models,
498	skills,	497	skills,
499	slashCommands: [COMPACT_SLASH_COMMAND],
500	probe: {	498	probe: {
501	installed: true,	499	installed: true,
502	version,	500	version,

apps/server/src/provider/Layers/ProviderRegistry.test.ts+10-4

apps/server/src/provider/Layers/ProviderService.test.ts-52

...	@@ -172,18 +172,6 @@ function makeFakeCodexAdapter(provider: ProviderDriverKind = CODEX_DRIVER) {	...	@@ -172,18 +172,6 @@ function makeFakeCodexAdapter(provider: ProviderDriverKind = CODEX_DRIVER) {
172	Effect.void,	172	Effect.void,
173	);	173	);
174		174
175	const compactThread = vi.fn((threadId: ThreadId) =>
176	Effect.sync(() =>
177	emit({
178	type: "thread.state.changed",
179	eventId: asEventId("evt-native-compact"),
180	provider,
181	createdAt: "2026-01-01T00:00:00.000Z",
182	threadId,
183	payload: { state: "compacted" },
184	}),
185	),
186	);
187	const respondToRequest = vi.fn(	175	const respondToRequest = vi.fn(
188	(	176	(
189	_threadId: ThreadId,	177	_threadId: ThreadId,
...	@@ -262,7 +250,6 @@ function makeFakeCodexAdapter(provider: ProviderDriverKind = CODEX_DRIVER) {	...	@@ -262,7 +250,6 @@ function makeFakeCodexAdapter(provider: ProviderDriverKind = CODEX_DRIVER) {
262	},	250	},
263	startSession,	251	startSession,
264	sendTurn,	252	sendTurn,
265	...(provider === CODEX_DRIVER ? { compactThread } : {}),
266	interruptTurn,	253	interruptTurn,
267	respondToRequest,	254	respondToRequest,
268	respondToUserInput,	255	respondToUserInput,
...	@@ -299,7 +286,6 @@ function makeFakeCodexAdapter(provider: ProviderDriverKind = CODEX_DRIVER) {	...	@@ -299,7 +286,6 @@ function makeFakeCodexAdapter(provider: ProviderDriverKind = CODEX_DRIVER) {
299	updateSession,	286	updateSession,
300	startSession,	287	startSession,
301	sendTurn,	288	sendTurn,
302	compactThread,
303	interruptTurn,	289	interruptTurn,
304	respondToRequest,	290	respondToRequest,
305	respondToUserInput,	291	respondToUserInput,
...	@@ -1048,10 +1034,6 @@ routing.layer("ProviderServiceLive routing", (it) => {	...	@@ -1048,10 +1034,6 @@ routing.layer("ProviderServiceLive routing", (it) => {
1048	});	1034	});
1049	assert.equal(routing.codex.sendTurn.mock.calls.length, 1);	1035	assert.equal(routing.codex.sendTurn.mock.calls.length, 1);
1050		1036
1051	yield* advanceTestClock(10);
1052	yield* provider.compactThread(session.threadId);
1053	assert.deepEqual(routing.codex.compactThread.mock.calls, [[session.threadId, undefined]]);
1054
1055	yield* provider.interruptTurn({ threadId: session.threadId });	1037	yield* provider.interruptTurn({ threadId: session.threadId });
1056	assert.deepEqual(routing.codex.interruptTurn.mock.calls, [[session.threadId, undefined]]);	1038	assert.deepEqual(routing.codex.interruptTurn.mock.calls, [[session.threadId, undefined]]);
1057		1039
...	@@ -1115,40 +1097,6 @@ routing.layer("ProviderServiceLive routing", (it) => {	...	@@ -1115,40 +1097,6 @@ routing.layer("ProviderServiceLive routing", (it) => {
1115	}),	1097	}),
1116	);	1098	);
1117		1099
1118	it.effect("marks a successful fallback compaction as compacted", () =>
1119	Effect.gen(function* () {
1120	const provider = yield* ProviderService.ProviderService;
1121	const threadId = asThreadId("thread-compact-cursor");
1122	yield* provider.startSession(threadId, {
1123	provider: CURSOR_DRIVER,
1124	providerInstanceId: ProviderInstanceId.make("cursor"),
1125	threadId,
1126	runtimeMode: "full-access",
1127	});
1128	const compactedEventFiber = yield* provider.streamEvents.pipe(
1129	Stream.filter((event) => event.type === "thread.state.changed"),
1130	Stream.runHead,
1131	Effect.forkChild,
1132	);
1133	const compactFiber = yield* provider.compactThread(threadId).pipe(Effect.forkChild);
1134	yield* advanceTestClock(50);
1135	routing.cursor.emit({
1136	type: "turn.completed",
1137	eventId: asEventId("evt-cursor-compact-completed"),
1138	provider: CURSOR_DRIVER,
1139	createdAt: "2026-01-01T00:00:01.000Z",
1140	threadId,
1141	turnId: asTurnId(`turn-${threadId}`),
1142	payload: { state: "completed" },
1143	});
1144	yield* Fiber.join(compactFiber);
1145
1146	const compacted = yield* Fiber.join(compactedEventFiber);
1147	assert.equal(compacted._tag, "Some");
1148	yield* provider.stopSession({ threadId });
1149	}),
1150	);
1151
1152	it.effect("routes feedback to the Codex adapter and returns its feedback ID", () =>	1100	it.effect("routes feedback to the Codex adapter and returns its feedback ID", () =>
1153	Effect.gen(function* () {	1101	Effect.gen(function* () {
1154	const provider = yield* ProviderService.ProviderService;	1102	const provider = yield* ProviderService.ProviderService;

apps/server/src/provider/Layers/ProviderService.ts+8-111

...	@@ -10,7 +10,6 @@	...	@@ -10,7 +10,6 @@
10	* @module ProviderServiceLive	10	* @module ProviderServiceLive
11	*/	11	*/
12	import {	12	import {
13	EventId,
14	ModelSelection,	13	ModelSelection,
15	NonNegativeInt,	14	NonNegativeInt,
16	ThreadId,	15	ThreadId,
...	@@ -29,7 +28,6 @@ import {	...	@@ -29,7 +28,6 @@ import {
29	import { expandAssistantCitationsForProvider } from "@t3tools/shared/assistantCitations";	28	import { expandAssistantCitationsForProvider } from "@t3tools/shared/assistantCitations";
30	import { causeErrorTag } from "@t3tools/shared/observability";	29	import { causeErrorTag } from "@t3tools/shared/observability";
31	import * as DateTime from "effect/DateTime";	30	import * as DateTime from "effect/DateTime";
32	import * as Deferred from "effect/Deferred";
33	import * as Effect from "effect/Effect";	31	import * as Effect from "effect/Effect";
34	import * as Layer from "effect/Layer";	32	import * as Layer from "effect/Layer";
35	import * as Option from "effect/Option";	33	import * as Option from "effect/Option";
...	@@ -51,7 +49,6 @@ import {	...	@@ -51,7 +49,6 @@ import {
51	providerTurnMetricAttributes,	49	providerTurnMetricAttributes,
52	withMetrics,	50	withMetrics,
53	} from "../../observability/Metrics.ts";	51	} from "../../observability/Metrics.ts";
54	import { ProviderAdapterRequestError } from "../Errors.ts";
55	import { type ProviderAdapterError, ProviderValidationError } from "../Errors.ts";	52	import { type ProviderAdapterError, ProviderValidationError } from "../Errors.ts";
56	import type { ProviderAdapterShape } from "../Services/ProviderAdapter.ts";	53	import type { ProviderAdapterShape } from "../Services/ProviderAdapter.ts";
57	import * as ProviderAdapterRegistry from "../Services/ProviderAdapterRegistry.ts";	54	import * as ProviderAdapterRegistry from "../Services/ProviderAdapterRegistry.ts";
...	@@ -236,17 +233,6 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (	...	@@ -236,17 +233,6 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (
236	const revokeMcpCredential =	233	const revokeMcpCredential =
237	options?.revokeMcpCredential ?? McpSessionRegistry.revokeActiveMcpThread;	234	options?.revokeMcpCredential ?? McpSessionRegistry.revokeActiveMcpThread;
238	const runtimeEventPubSub = yield* PubSub.unbounded<ProviderRuntimeEvent>();	235	const runtimeEventPubSub = yield* PubSub.unbounded<ProviderRuntimeEvent>();
239	const pendingCompactions = new Map<
240	ThreadId,
241	{ readonly completion: Deferred.Deferred<string>; readonly synthesizeCompactedEvent: boolean }
242	>();
243	const settleCompaction = (threadId: ThreadId, terminal: string) => {
244	const pending = pendingCompactions.get(threadId);
245	pendingCompactions.delete(threadId);
246	return pending
247	? Deferred.succeed(pending.completion, terminal).pipe(Effect.as(pending))
248	: Effect.succeed(undefined);
249	};
250	const nowIso = Effect.map(DateTime.now, DateTime.formatIso);	236	const nowIso = Effect.map(DateTime.now, DateTime.formatIso);
251	/**	237	/**
252	* Attach the `t3-code` MCP server to the session that is about to start.	238	* Attach the `t3-code` MCP server to the session that is about to start.
...	@@ -359,58 +345,14 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (	...	@@ -359,58 +345,14 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (
359	},	345	},
360	event: ProviderRuntimeEvent,	346	event: ProviderRuntimeEvent,
361	): Effect.Effect<void> =>	347	): Effect.Effect<void> =>
362	Effect.gen(function* () {	348	Effect.sync(() => correlateRuntimeEventWithInstance(source, event)).pipe(
363	const canonicalEvent = yield* Effect.sync(() =>	349	Effect.flatMap((canonicalEvent) =>
364	correlateRuntimeEventWithInstance(source, event),	350	increment(providerRuntimeEventsTotal, {
365	);	351	provider: canonicalEvent.provider,
366	yield* increment(providerRuntimeEventsTotal, {	352	eventType: canonicalEvent.type,
367	provider: canonicalEvent.provider,	353	}).pipe(Effect.andThen(publishRuntimeEvent(canonicalEvent))),
368	eventType: canonicalEvent.type,	354	),
369	});	355	);
370	yield* publishRuntimeEvent(canonicalEvent);
371	const pendingCompaction = pendingCompactions.get(canonicalEvent.threadId);
372	if (!pendingCompaction) return;
373	if (
374	!pendingCompaction.synthesizeCompactedEvent &&
375	canonicalEvent.type === "thread.state.changed" &&
376	canonicalEvent.payload.state === "compacted"
377	) {
378	yield* settleCompaction(canonicalEvent.threadId, "completed");
379	return;
380	}
381	const compactionTerminal =
382	canonicalEvent.type === "turn.completed"
383	? canonicalEvent.payload.state
384	: canonicalEvent.type === "session.exited" \|\|
385	canonicalEvent.type === "runtime.error" \|\|
386	canonicalEvent.type === "turn.aborted"
387	? canonicalEvent.type
388	: null;
389	const settledCompaction =
390	compactionTerminal !== null &&
391	(yield* settleCompaction(canonicalEvent.threadId, compactionTerminal));
392	if (
393	!settledCompaction \|\|
394	compactionTerminal !== "completed" \|\|
395	!settledCompaction.synthesizeCompactedEvent
396	) {
397	return;
398	}
399	const compactedEvent = {
400	...canonicalEvent,
401	eventId: EventId.make(`${canonicalEvent.eventId}:context-compaction`),
402	type: "thread.state.changed",
403	payload: {
404	state: "compacted",
405	detail: { source: "provider-native-command" },
406	},
407	} satisfies ProviderRuntimeEvent;
408	yield* increment(providerRuntimeEventsTotal, {
409	provider: compactedEvent.provider,
410	eventType: compactedEvent.type,
411	});
412	yield* publishRuntimeEvent(compactedEvent);
413	});
414		356
415	// `subscribedAdapters` is our source-of-truth for "which instance adapters	357	// `subscribedAdapters` is our source-of-truth for "which instance adapters
416	// are currently wired into the runtime event bus". It both tracks the set	358	// are currently wired into the runtime event bus". It both tracks the set
...	@@ -912,50 +854,6 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (	...	@@ -912,50 +854,6 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (
912	);	854	);
913	});	855	});
914		856
915	const compactThread: ProviderServiceMethod<"compactThread"> = Effect.fn("compactThread")(
916	function* (threadId, modelSelection) {
917	const routed = yield* resolveRoutableSession({
918	threadId,
919	operation: "ProviderService.compactThread",
920	allowRecovery: true,
921	});
922	yield* Effect.annotateCurrentSpan({
923	"provider.operation": "compact-thread",
924	"provider.kind": routed.adapter.provider,
925	"provider.thread_id": threadId,
926	});
927	yield* McpSessionRegistry.touchActiveMcpThread(threadId);
928	const nativeCompaction = routed.adapter.compactThread;
929	const completion = yield* Deferred.make<string>();
930	pendingCompactions.set(threadId, {
931	completion,
932	synthesizeCompactedEvent: nativeCompaction === undefined,
933	});
934	const terminal = yield* (
935	nativeCompaction
936	? nativeCompaction(routed.threadId, modelSelection)
937	: sendTurn({
938	threadId,
939	input: routed.adapter.provider === "cursor" ? "/compress" : "/compact",
940	...(modelSelection !== undefined ? { modelSelection } : {}),
941	})
942	).pipe(
943	Effect.andThen(Deferred.await(completion)),
944	Effect.ensuring(Effect.sync(() => void pendingCompactions.delete(threadId))),
945	);
946	if (terminal !== "completed") {
947	return yield* new ProviderAdapterRequestError({
948	provider: routed.adapter.provider,
949	method: "turn/start",
950	detail: `Context compaction ended with ${terminal}.`,
951	});
952	}
953	yield* analytics.record("provider.thread.compacted", {
954	provider: routed.adapter.provider,
955	});
956	},
957	);
958
959	const interruptTurn: ProviderServiceMethod<"interruptTurn"> = Effect.fn("interruptTurn")(	857	const interruptTurn: ProviderServiceMethod<"interruptTurn"> = Effect.fn("interruptTurn")(
960	function* (rawInput) {	858	function* (rawInput) {
961	const input = yield* decodeInputOrValidationError({	859	const input = yield* decodeInputOrValidationError({
...	@@ -1351,7 +1249,6 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (	...	@@ -1351,7 +1249,6 @@ const makeProviderService = Effect.fn("makeProviderService")(function* (
1351	return {	1249	return {
1352	startSession,	1250	startSession,
1353	sendTurn,	1251	sendTurn,
1354	compactThread,
1355	interruptTurn,	1252	interruptTurn,
1356	respondToRequest,	1253	respondToRequest,
1357	respondToUserInput,	1254	respondToUserInput,

apps/server/src/provider/Layers/ProviderSessionReaper.test.ts-1

...	@@ -164,7 +164,6 @@ describe("ProviderSessionReaper", () => {	...	@@ -164,7 +164,6 @@ describe("ProviderSessionReaper", () => {
164	const providerService: ProviderServiceShape = {	164	const providerService: ProviderServiceShape = {
165	startSession: () => unsupported(),	165	startSession: () => unsupported(),
166	sendTurn: () => unsupported(),	166	sendTurn: () => unsupported(),
167	compactThread: () => unsupported(),
168	interruptTurn: () => unsupported(),	167	interruptTurn: () => unsupported(),
169	respondToRequest: () => unsupported(),	168	respondToRequest: () => unsupported(),
170	respondToUserInput: () => unsupported(),	169	respondToUserInput: () => unsupported(),

apps/server/src/provider/Services/ProviderAdapter.ts-5

 @@ -68,11 +68,6 @@ export interface ProviderAdapterShape<TError> {
     input: ProviderSendTurnInput,
   ) => Effect.Effect<ProviderTurnStartResult, TError>;
-  readonly compactThread?: (
-    threadId: ThreadId,
-    modelSelection?: ProviderSendTurnInput["modelSelection"],
-  ) => Effect.Effect<void, TError>;
   /**
    * Interrupt an active turn.
    */

apps/server/src/provider/Services/ProviderService.ts-5

 @@ -53,11 +53,6 @@ export interface ProviderServiceShape {
     input: ProviderSendTurnInput,
   ) => Effect.Effect<ProviderTurnStartResult, ProviderServiceError>;
-  readonly compactThread: (
-    threadId: ThreadId,
-    modelSelection?: ProviderSendTurnInput["modelSelection"],
-  ) => Effect.Effect<void, ProviderServiceError>;
   /**
    * Interrupt a running provider turn.
    */

apps/server/src/provider/providerSnapshot.ts-5

 @@ -22,11 +22,6 @@ export const DEFAULT_TIMEOUT_MS = 4_000;
 // Auth status checks involve disk/network lookups and can be slow on first run (especially Windows)
 export const AUTH_PROBE_TIMEOUT_MS = 10_000;
-export const COMPACT_SLASH_COMMAND = {
-  name: "compact",
-  description: "Summarize the conversation and reduce context usage",
-} satisfies ServerProviderSlashCommand;
 export interface CommandResult {
   readonly stdout: string;
   readonly stderr: string;

apps/server/src/serverRuntimeStartup.reconcile.test.ts-1

...	@@ -51,7 +51,6 @@ const makeProviderService = (liveThreadIds: ReadonlyArray<ThreadId> = []) =>	...	@@ -51,7 +51,6 @@ const makeProviderService = (liveThreadIds: ReadonlyArray<ThreadId> = []) =>
51	({	51	({
52	startSession: () => Effect.die("unused"),	52	startSession: () => Effect.die("unused"),
53	sendTurn: () => Effect.die("unused"),	53	sendTurn: () => Effect.die("unused"),
54	compactThread: () => Effect.die("unused"),
55	interruptTurn: () => Effect.die("unused"),	54	interruptTurn: () => Effect.die("unused"),
56	respondToRequest: () => Effect.die("unused"),	55	respondToRequest: () => Effect.die("unused"),
57	respondToUserInput: () => Effect.die("unused"),	56	respondToUserInput: () => Effect.die("unused"),

apps/web/src/components/ChatView.tsx+19-21

 @@ -328,7 +328,7 @@ import {
 import type { ComposerBannerStackItem } from "./chat/ComposerBannerStack";
 import { ComposerSurface } from "./chat/ComposerSurface";
 import {
-  hasAvailableCompactionProvider,
+  hasAvailableClaudeCompactionProvider,
   hasDismissedResumeCompaction,
   shouldOfferResumeCompaction,
 } from "./chat/ContextWindowMeter.logic";
 @@ -2947,23 +2947,13 @@ function ChatViewContent(props: ChatViewProps) {
     activeThread?.modelSelection.instanceId ??
     activeProject?.defaultModelSelection?.instanceId ??
     null;
-  const activeProviderStatus = useMemo(() => {
+  const compactionProviderAvailable = useMemo(
-    if (activeProviderInstanceId) {
-      return (
-        providerStatuses.find((status) => status.instanceId === activeProviderInstanceId) ?? null
-      );
-    }
-    const defaultInstanceId = defaultInstanceIdForDriver(selectedProvider);
-    return providerStatuses.find((status) => status.instanceId === defaultInstanceId) ?? null;
-  }, [activeProviderInstanceId, providerStatuses, selectedProvider]);
-  const manualCompactionProviderAvailable = useMemo(
     () =>
-      hasAvailableCompactionProvider({
+      hasAvailableClaudeCompactionProvider({
         providers: applyProviderInstanceSettings(
           deriveProviderInstanceEntries(providerStatuses),
           settings,
         ),
-        driverKind: selectedProvider,
         instanceId: activeProviderInstanceId,
         lockedInstanceId: lockedProvider
           ? (activeThread?.session?.providerInstanceId ??
 @@ -2977,10 +2967,18 @@ function ChatViewContent(props: ChatViewProps) {
       activeThread?.session?.providerInstanceId,
       lockedProvider,
       providerStatuses,
-      selectedProvider,
       settings,
     ],
   );
+  const activeProviderStatus = useMemo(() => {
+    if (activeProviderInstanceId) {
+      return (
+        providerStatuses.find((status) => status.instanceId === activeProviderInstanceId) ?? null
+      );
+    }
+    const defaultInstanceId = defaultInstanceIdForDriver(selectedProvider);
+    return providerStatuses.find((status) => status.instanceId === defaultInstanceId) ?? null;
+  }, [activeProviderInstanceId, providerStatuses, selectedProvider]);
   const [resumeCompactionPermanentlyDismissed, setResumeCompactionPermanentlyDismissed] =
     useLocalStorage(
       `t3code:resume-compaction-dismissed:${environmentId}:${activeProviderInstanceId ?? "claudeAgent"}`,
 @@ -5246,11 +5244,12 @@ function ChatViewContent(props: ChatViewProps) {
     activeThread && activeContextWindow
       ? `${activeThread.id}:${activeContextWindow.updatedAt}`
       : null;
-  const compactThreadUnavailable =
+  const compactDisabled =
     !activeThread ||
     !activeProject ||
     !isServerThread ||
-    !manualCompactionProviderAvailable ||
+    selectedProvider !== "claudeAgent" ||
+    !compactionProviderAvailable ||
     isWorking ||
     threadDetailLoading ||
     isPreparingWorktree ||
 @@ -5258,15 +5257,15 @@ function ChatViewContent(props: ChatViewProps) {
     feedbackUploading ||
     pendingApprovals.length > 0 ||
     pendingUserInputs.length > 0 ||
-    showPlanFollowUpPrompt;
+    showPlanFollowUpPrompt ||
-  const compactDisabled = compactThreadUnavailable || composerHasUnsentContent;
+    composerHasUnsentContent;
   const compactDisabledReason = compactDisabled
     ? composerHasUnsentContent
       ? "Send or clear your draft before compacting"
       : !activeProject
         ? "Choose a project before compacting"
-        : !manualCompactionProviderAvailable
+        : !compactionProviderAvailable
-          ? "Compaction is unavailable for this provider"
+          ? "Enable a Claude provider before compacting"
           : "Compacting is unavailable right now"
     : null;
   const resumeCompactionBannerItem = useMemo<ComposerBannerStackItem | null>(() => {
 @@ -7650,7 +7649,6 @@ function ChatViewContent(props: ChatViewProps) {
                             }
                             activeThreadModelSelection={activeThread?.modelSelection}
                             activeContextWindow={activeContextWindow}
-                            compactThreadUnavailable={compactThreadUnavailable}
                             compactDisabled={compactDisabled}
                             compactDisabledReason={compactDisabledReason}
                             resolvedTheme={resolvedTheme}

apps/web/src/components/chat/ChatComposer.tsx+8-23

...	@@ -163,10 +163,7 @@ import {	...	@@ -163,10 +163,7 @@ import {
163	renderProviderTraitsPicker,	163	renderProviderTraitsPicker,
164	} from "./composerProviderState";	164	} from "./composerProviderState";
165	import { ContextWindowMeter } from "./ContextWindowMeter";	165	import { ContextWindowMeter } from "./ContextWindowMeter";
166	import {	166	import { resolveContextWindowModelDisplayName } from "./ContextWindowMeter.logic";
167	providerSupportsManualCompaction,
168	resolveContextWindowModelDisplayName,
169	} from "./ContextWindowMeter.logic";
170	import {	167	import {
171	attachVideoThumbnail,	168	attachVideoThumbnail,
172	buildExpandedImagePreview,	169	buildExpandedImagePreview,
...	@@ -694,7 +691,6 @@ export interface ChatComposerProps {	...	@@ -694,7 +691,6 @@ export interface ChatComposerProps {
694		691
695	// Context window	692	// Context window
696	activeContextWindow: ContextWindowSnapshot \| null;	693	activeContextWindow: ContextWindowSnapshot \| null;
697	compactThreadUnavailable: boolean;
698	compactDisabled: boolean;	694	compactDisabled: boolean;
699	compactDisabledReason: string \| null;	695	compactDisabledReason: string \| null;
700		696
...	@@ -791,7 +787,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -791,7 +787,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
791	activeProjectDefaultModelSelection,	787	activeProjectDefaultModelSelection,
792	activeThreadModelSelection,	788	activeThreadModelSelection,
793	activeContextWindow,	789	activeContextWindow,
794	compactThreadUnavailable,
795	compactDisabled,	790	compactDisabled,
796	compactDisabledReason,	791	compactDisabledReason,
797	resolvedTheme,	792	resolvedTheme,
...	@@ -1125,7 +1120,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -1125,7 +1120,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
1125	() => selectedProviderEntry?.snapshot ?? null,	1120	() => selectedProviderEntry?.snapshot ?? null,
1126	[selectedProviderEntry],	1121	[selectedProviderEntry],
1127	);	1122	);
1128	const compactCommandAvailable = providerSupportsManualCompaction(selectedProviderEntry);
1129	const selectedProviderSkills = selectedProviderStatus	1123	const selectedProviderSkills = selectedProviderStatus
1130	? resolveProviderSkillsForCwd(selectedProviderStatus, gitCwd)	1124	? resolveProviderSkillsForCwd(selectedProviderStatus, gitCwd)
1131	: [];	1125	: [];
...	@@ -1354,6 +1348,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -1354,6 +1348,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
1354	prompt,	1348	prompt,
1355	],	1349	],
1356	);	1350	);
		1351
1357	// ------------------------------------------------------------------	1352	// ------------------------------------------------------------------
1358	// Derived: composer trigger / menu	1353	// Derived: composer trigger / menu
1359	// ------------------------------------------------------------------	1354	// ------------------------------------------------------------------
...	@@ -1365,16 +1360,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -1365,16 +1360,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
1365	cwd: isPathTrigger ? gitCwd : null,	1360	cwd: isPathTrigger ? gitCwd : null,
1366	query: isPathTrigger ? pathTriggerQuery : null,	1361	query: isPathTrigger ? pathTriggerQuery : null,
1367	});	1362	});
1368	const compactSlashCommandAvailable =
1369	composerTrigger?.kind === "slash-command" &&
1370	!compactThreadUnavailable &&
1371	prompt.slice(composerTrigger.rangeEnd).trim() === "" &&
1372	composerImages.length + composerFiles.length === 0 &&
1373	composerDraft.persistedAttachments.length === 0 &&
1374	composerTerminalContexts.length === 0 &&
1375	composerElementContexts.length === 0 &&
1376	composerPreviewAnnotations.length === 0 &&
1377	composerReviewComments.length === 0;
1378		1363
1379	const composerMenuItems = useMemo<ComposerCommandItem[]>(() => {	1364	const composerMenuItems = useMemo<ComposerCommandItem[]>(() => {
1380	if (!composerTrigger) return [];	1365	if (!composerTrigger) return [];
...	@@ -1443,11 +1428,8 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -1443,11 +1428,8 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
1443	skill.description ??	1428	skill.description ??
1444	(skill.scope ? `${skill.scope} skill` : ""),	1429	(skill.scope ? `${skill.scope} skill` : ""),
1445	}));	1430	}));
1446	const visibleProviderSlashCommandItems = providerSlashCommandItems.filter(
1447	(item) => item.command.name !== "compact" \|\| compactSlashCommandAvailable,
1448	);
1449	const slashCommandItems = slashCommandItemsForPromptPosition(	1431	const slashCommandItems = slashCommandItemsForPromptPosition(
1450	[...builtInSlashCommandItems, ...visibleProviderSlashCommandItems, ...skillItems],	1432	[...builtInSlashCommandItems, ...providerSlashCommandItems, ...skillItems],
1451	composerTrigger.rangeStart === 0,	1433	composerTrigger.rangeStart === 0,
1452	);	1434	);
1453	return searchSlashCommandItems(slashCommandItems, query);	1435	return searchSlashCommandItems(slashCommandItems, query);
...	@@ -1467,7 +1449,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -1467,7 +1449,6 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
1467	}	1449	}
1468	return [];	1450	return [];
1469	}, [	1451	}, [
1470	compactSlashCommandAvailable,
1471	composerTrigger,	1452	composerTrigger,
1472	planModeUiEnabled,	1453	planModeUiEnabled,
1473	selectedProvider,	1454	selectedProvider,
...	@@ -2317,6 +2298,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -2317,6 +2298,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
2317	if (	2298	if (
2318	compactDisabled \|\|	2299	compactDisabled \|\|
2319	noProviderAvailable \|\|	2300	noProviderAvailable \|\|
		2301	composerSendState.hasSendableContent \|\|
2320	activePendingApproval !== null \|\|	2302	activePendingApproval !== null \|\|
2321	pendingUserInputs.length > 0 \|\|	2303	pendingUserInputs.length > 0 \|\|
2322	phase === "running" \|\|	2304	phase === "running" \|\|
...	@@ -2354,6 +2336,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -2354,6 +2336,7 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
2354	activeThreadId,	2336	activeThreadId,
2355	compactDisabled,	2337	compactDisabled,
2356	composerDraftTarget,	2338	composerDraftTarget,
		2339	composerSendState.hasSendableContent,
2357	isConnecting,	2340	isConnecting,
2358	isSendBusy,	2341	isSendBusy,
2359	noProviderAvailable,	2342	noProviderAvailable,
...	@@ -4419,7 +4402,9 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)	...	@@ -4419,7 +4402,9 @@ export const ChatComposer = memo(function ChatComposer(props: ChatComposerProps)
4419	compactDisabled \|\| noProviderAvailable \|\| isSendBusy \|\| isConnecting	4402	compactDisabled \|\| noProviderAvailable \|\| isSendBusy \|\| isConnecting
4420	}	4403	}
4421	compactDisabledReason={resolvedCompactDisabledReason}	4404	compactDisabledReason={resolvedCompactDisabledReason}
4422	{...(compactCommandAvailable ? { onCompactContext: compactThreadContext } : {})}	4405	{...(selectedProvider === "claudeAgent"
		4406	? { onCompactContext: compactThreadContext }
		4407	: {})}
4423	/>	4408	/>
4424	</div>	4409	</div>
4425	</div>	4410	</div>

apps/web/src/components/chat/ContextWindowMeter.logic.test.ts+5-7

 @@ -3,7 +3,7 @@ import { describe, expect, it } from "vite-plus/test";
 import { deriveProviderInstanceEntries } from "../../providerInstances";
 import {
   formatContextWindowCompactionMessage,
-  hasAvailableCompactionProvider,
+  hasAvailableClaudeCompactionProvider,
   hasDismissedResumeCompaction,
   resolveContextWindowModelDisplayName,
   shouldOfferResumeCompaction,
 @@ -25,12 +25,12 @@ function claudeProvider(input: {
     auth: { status: "authenticated" },
     checkedAt: "2026-08-24T12:00:00.000Z",
     models: [],
-    slashCommands: [{ name: "compact", description: "" }],
+    slashCommands: [],
     skills: [],
   };
 }
-describe("hasAvailableCompactionProvider", () => {
+describe("hasAvailableClaudeCompactionProvider", () => {
   const originalInstanceId = ProviderInstanceId.make("claude_original");
   it("rejects a fallback in a different locked continuation group", () => {
 @@ -47,9 +47,8 @@ describe("hasAvailableCompactionProvider", () => {
     ]);
     expect(
-      hasAvailableCompactionProvider({
+      hasAvailableClaudeCompactionProvider({
         providers,
-        driverKind: ProviderDriverKind.make("claudeAgent"),
         instanceId: originalInstanceId,
         lockedInstanceId: originalInstanceId,
       }),
 @@ -70,9 +69,8 @@ describe("hasAvailableCompactionProvider", () => {
     ]);
     expect(
-      hasAvailableCompactionProvider({
+      hasAvailableClaudeCompactionProvider({
         providers,
-        driverKind: ProviderDriverKind.make("claudeAgent"),
         instanceId: originalInstanceId,
         lockedInstanceId: originalInstanceId,
       }),

apps/web/src/components/chat/ContextWindowMeter.logic.ts+10-16

 @@ -1,4 +1,4 @@
-import type { ModelSelection, ProviderDriverKind, ProviderInstanceId } from "@t3tools/contracts";
+import type { ModelSelection, ProviderInstanceId } from "@t3tools/contracts";
 import {
   CLAUDE_RESUME_COMPACTION_NEVER_ANSWER,
   isClaudeResumeCompactionQuestion,
 @@ -12,33 +12,27 @@ import { getTriggerDisplayModelName, type ModelEsque } from "./providerIconUtils
 export const CLAUDE_RESUME_COMPACTION_MINUTES = 70;
 export const CLAUDE_RESUME_COMPACTION_TOKENS = 100_000;
-export function providerSupportsManualCompaction(
+export function hasAvailableClaudeCompactionProvider(input: {
-  provider: ProviderInstanceEntry | null | undefined,
-): boolean {
-  return provider?.snapshot.slashCommands.some((command) => command.name === "compact") ?? false;
-}
-export function hasAvailableCompactionProvider(input: {
   readonly providers: ReadonlyArray<ProviderInstanceEntry>;
-  readonly driverKind: ProviderDriverKind;
   readonly instanceId: ProviderInstanceId | null;
   readonly lockedInstanceId: ProviderInstanceId | null;
 }): boolean {
-  const driverProviders = input.providers.filter(
+  const claudeProviders = input.providers.filter(
-    (provider) => provider.driverKind === input.driverKind,
+    (provider) => provider.driverKind === "claudeAgent",
   );
   const lockedContinuationGroupKey = input.lockedInstanceId
-    ? driverProviders.find((provider) => provider.instanceId === input.lockedInstanceId)
+    ? claudeProviders.find((provider) => provider.instanceId === input.lockedInstanceId)
         ?.continuationGroupKey
     : undefined;
   const compatibleProviders = lockedContinuationGroupKey
-    ? driverProviders.filter(
+    ? claudeProviders.filter(
         (provider) => provider.continuationGroupKey === lockedContinuationGroupKey,
       )
-    : driverProviders;
+    : claudeProviders;
-  return providerSupportsManualCompaction(
+  return (
-    resolveSelectableProviderInstanceEntry(compatibleProviders, input.instanceId ?? undefined),
+    resolveSelectableProviderInstanceEntry(compatibleProviders, input.instanceId ?? undefined) !==
+    undefined
   );
 }

apps/web/src/components/chat/MessagesTimeline.test.tsx+2-2

...	@@ -919,7 +919,7 @@ describe("MessagesTimeline", () => {	...	@@ -919,7 +919,7 @@ describe("MessagesTimeline", () => {
919	entry: {	919	entry: {
920	id: "work-1",	920	id: "work-1",
921	createdAt: "2026-03-17T19:12:28.000Z",	921	createdAt: "2026-03-17T19:12:28.000Z",
922	label: "Compacted context 899K → 19K tokens",	922	label: "Context compacted",
923	tone: "info",	923	tone: "info",
924	},	924	},
925	},	925	},
...	@@ -927,7 +927,7 @@ describe("MessagesTimeline", () => {	...	@@ -927,7 +927,7 @@ describe("MessagesTimeline", () => {
927	/>,	927	/>,
928	);	928	);
929		929
930	expect(markup).toContain("Compacted context 899K → 19K tokens");	930	expect(markup).toContain("Context compacted");
931	});	931	});
932		932
933	it("summarizes changed files in one line", () => {	933	it("summarizes changed files in one line", () => {

docs/user/composer.md-2

...	@@ -196,8 +196,6 @@ such as System, Personal, Project, or App.	...	@@ -196,8 +196,6 @@ such as System, Personal, Project, or App.
196	On mobile, these menus are available on the New task screen before you start a thread. They	196	On mobile, these menus are available on the New task screen before you start a thread. They
197	use the skills and commands from the selected environment and provider.	197	use the skills and commands from the selected environment and provider.
198		198
199	In an existing thread, send `/compact` to reduce context usage. Web and desktop also offer this action from the context meter, and the work log records token counts when the provider reports them.
200
201	By default, the `/` menu includes skills. To keep this menu command-only, turn off **Show skills in	199	By default, the `/` menu includes skills. To keep this menu command-only, turn off **Show skills in
202	slash menu in Settings → General**. Skill results use the `/skill:Skill Name` label and add the	200	slash menu in Settings → General**. Skill results use the `/skill:Skill Name` label and add the
203	same `$name` skill token to your message. The original skill name remains searchable. If the provider	201	same `$name` skill token to your message. The original skill name remains searchable. If the provider

packages/contracts/src/providerRuntime.ts-2

...	@@ -298,8 +298,6 @@ export type ThreadStartedPayload = typeof ThreadStartedPayload.Type;	...	@@ -298,8 +298,6 @@ export type ThreadStartedPayload = typeof ThreadStartedPayload.Type;
298		298
299	const ThreadStateChangedPayload = Schema.Struct({	299	const ThreadStateChangedPayload = Schema.Struct({
300	state: RuntimeThreadState,	300	state: RuntimeThreadState,
301	beforeTokens: Schema.optional(NonNegativeInt),
302	afterTokens: Schema.optional(NonNegativeInt),
303	detail: Schema.optional(Schema.Unknown),	301	detail: Schema.optional(Schema.Unknown),
304	});	302	});
305	export type ThreadStateChangedPayload = typeof ThreadStateChangedPayload.Type;	303	export type ThreadStateChangedPayload = typeof ThreadStateChangedPayload.Type;

author	maria <maria@kuuro.net> 2026-09-02 18:58:07-04:00
committer	GitHub <noreply@github.com> 2026-09-02 18:58:07-04:00
log	63f334baf3432c4404ddfc9e71d33bf16575f0ed
tree	a868ddf8cc912c2ae8921964e29f219103884f95
parent	064392ffc7fc58fcc3018fd2ba2df33fbb21f1de
signature	Signed by PGP key B5690EEEBB952194

...	@@ -105,7 +105,6 @@ function createProviderServiceHarness() {	...	@@ -105,7 +105,6 @@ function createProviderServiceHarness() {
105	const service: ProviderServiceShape = {	105	const service: ProviderServiceShape = {
106	startSession: () => unsupported(),	106	startSession: () => unsupported(),
107	sendTurn: () => unsupported(),	107	sendTurn: () => unsupported(),
108	compactThread: () => unsupported(),
109	interruptTurn: () => unsupported(),	108	interruptTurn: () => unsupported(),
110	respondToRequest: () => unsupported(),	109	respondToRequest: () => unsupported(),
111	respondToUserInput: () => unsupported(),	110	respondToUserInput: () => unsupported(),
...	@@ -3222,8 +3221,6 @@ describe("ProviderRuntimeIngestion", () => {	...	@@ -3222,8 +3221,6 @@ describe("ProviderRuntimeIngestion", () => {
3222	turnId: asTurnId("turn-1"),	3221	turnId: asTurnId("turn-1"),
3223	payload: {	3222	payload: {
3224	state: "compacted",	3223	state: "compacted",
3225	beforeTokens: 899_000,
3226	afterTokens: 19_000,
3227	detail: { source: "provider" },	3224	detail: { source: "provider" },
3228	},	3225	},
3229	});	3226	});
...	@@ -3237,7 +3234,7 @@ describe("ProviderRuntimeIngestion", () => {	...	@@ -3237,7 +3234,7 @@ describe("ProviderRuntimeIngestion", () => {
3237	const activity = thread.activities.find(	3234	const activity = thread.activities.find(
3238	(candidate: ProviderRuntimeTestActivity) => candidate.kind === "context-compaction",	3235	(candidate: ProviderRuntimeTestActivity) => candidate.kind === "context-compaction",
3239	);	3236	);
3240	expect(activity?.summary).toBe("Compacted context 899K → 19K tokens");	3237	expect(activity?.summary).toBe("Context compacted");
3241	expect(activity?.tone).toBe("info");	3238	expect(activity?.tone).toBe("info");
3242	});	3239	});
3243		3240

...	@@ -48,7 +48,6 @@ import {	...	@@ -48,7 +48,6 @@ import {
48	import * as ServerConfig from "../../config.ts";	48	import * as ServerConfig from "../../config.ts";
49	import * as ServerSettingsModule from "../../serverSettings.ts";	49	import * as ServerSettingsModule from "../../serverSettings.ts";
50	import { readProviderStatusCache, resolveProviderStatusCachePath } from "../providerStatusCache.ts";	50	import { readProviderStatusCache, resolveProviderStatusCachePath } from "../providerStatusCache.ts";
51	import { COMPACT_SLASH_COMMAND } from "../providerSnapshot.ts";
52	import type { ProviderInstance } from "../ProviderDriver.ts";	51	import type { ProviderInstance } from "../ProviderDriver.ts";
53	import * as ProviderInstanceRegistry from "../Services/ProviderInstanceRegistry.ts";	52	import * as ProviderInstanceRegistry from "../Services/ProviderInstanceRegistry.ts";
54	import * as ProviderRegistry from "../Services/ProviderRegistry.ts";	53	import * as ProviderRegistry from "../Services/ProviderRegistry.ts";
...	@@ -385,7 +384,7 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsModule.layerTest(), Te	...	@@ -385,7 +384,7 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsModule.layerTest(), Te
385	shortDescription: "Debug failing GitHub Actions checks",	384	shortDescription: "Debug failing GitHub Actions checks",
386	},	385	},
387	]);	386	]);
388	assert.deepStrictEqual(status.slashCommands.slice(1), [	387	assert.deepStrictEqual(status.slashCommands, [
389	{	388	{
390	name: "feedback",	389	name: "feedback",
391	description: "Send this thread and Codex logs to OpenAI",	390	description: "Send this thread and Codex logs to OpenAI",
...	@@ -2440,7 +2439,11 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsModule.layerTest(), Te	...	@@ -2440,7 +2439,11 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsModule.layerTest(), Te
2440	}),	2439	}),
2441	);	2440	);
2442		2441
2443	assert.deepStrictEqual(status.slashCommands.slice(1), [	2442	assert.deepStrictEqual(status.slashCommands, [
		2443	{
		2444	name: "compact",
		2445	description: "Summarize the conversation and reduce context usage",
		2446	},
2444	{	2447	{
2445	name: "review",	2448	name: "review",
2446	description: "Review a pull request",	2449	description: "Review a pull request",
...	@@ -2484,7 +2487,10 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsModule.layerTest(), Te	...	@@ -2484,7 +2487,10 @@ it.layer(Layer.mergeAll(NodeServices.layer, ServerSettingsModule.layerTest(), Te
2484	);	2487	);
2485		2488
2486	assert.deepStrictEqual(status.slashCommands, [	2489	assert.deepStrictEqual(status.slashCommands, [
2487	COMPACT_SLASH_COMMAND,	2490	{
		2491	name: "compact",
		2492	description: "Summarize the conversation and reduce context usage",
		2493	},
2488	{	2494	{
2489	name: "ui",	2495	name: "ui",
2490	description: "Explore and refine UI",	2496	description: "Explore and refine UI",

Revert "feat(providers): add context compaction across harnesses" (#9284)