Extract collection performance refactors from mobile stack

apps/server/src/auth/Layers/AuthControlPlane.ts

@@ -64,11 +64,16 @@ export const makeAuthControlPlane = Effect.gen(function* () {
 
   const listPairingLinks: AuthControlPlaneShape["listPairingLinks"] = (input) =>
     bootstrapCredentials.listActive().pipe(
-      Effect.map((pairingLinks) =>
-        pairingLinks
-          .filter((pairingLink) => (input?.role ? pairingLink.role === input.role : true))
-          .filter((pairingLink) => !input?.excludeSubjects?.includes(pairingLink.subject))
-          .map((pairingLink) =>
+      Effect.map((pairingLinks) => {
+        const activeLinks: Array<AuthPairingLink> = [];
+        for (const pairingLink of pairingLinks) {
+          if (input?.role && pairingLink.role !== input.role) {
+            continue;
+          }
+          if (input?.excludeSubjects?.includes(pairingLink.subject)) {
+            continue;
+          }
+          activeLinks.push(
             pairingLink.label
               ? ({
                   id: pairingLink.id,
@@ -87,11 +92,12 @@ export const makeAuthControlPlane = Effect.gen(function* () {
                   createdAt: pairingLink.createdAt,
                   expiresAt: pairingLink.expiresAt,
                 } satisfies AuthPairingLink),
-          )
-          .toSorted(
-            (left, right) => right.createdAt.epochMilliseconds - left.createdAt.epochMilliseconds,
-          ),
-      ),
+          );
+        }
+        return activeLinks.toSorted(
+          (left, right) => right.createdAt.epochMilliseconds - left.createdAt.epochMilliseconds,
+        );
+      }),
       Effect.mapError(toAuthControlPlaneError("Failed to list pairing links.")),
     );
 

apps/server/src/git/remoteRefs.ts

@@ -1,8 +1,12 @@
 export function parseRemoteNamesInGitOrder(stdout: string): ReadonlyArray<string> {
-  return stdout
-    .split("\n")
-    .map((line) => line.trim())
-    .filter((line) => line.length > 0);
+  const remoteNames: Array<string> = [];
+  for (const line of stdout.split("\n")) {
+    const remoteName = line.trim();
+    if (remoteName.length > 0) {
+      remoteNames.push(remoteName);
+    }
+  }
+  return remoteNames;
 }
 
 export function parseRemoteNames(stdout: string): ReadonlyArray<string> {

apps/server/src/imageMime.ts

@@ -35,10 +35,13 @@ export function parseBase64DataUrl(
   const match = /^data:([^,]+),([a-z0-9+/=\r\n ]+)$/i.exec(dataUrl.trim());
   if (!match) return null;
 
-  const headerParts = (match[1] ?? "")
-    .split(";")
-    .map((part) => part.trim())
-    .filter((part) => part.length > 0);
+  const headerParts: Array<string> = [];
+  for (const part of (match[1] ?? "").split(";")) {
+    const trimmed = part.trim();
+    if (trimmed.length > 0) {
+      headerParts.push(trimmed);
+    }
+  }
   if (headerParts.length < 2) {
     return null;
   }

apps/server/src/keybindings.ts

@@ -32,6 +32,7 @@ import * as Layer from "effect/Layer";
 import * as Option from "effect/Option";
 import * as Predicate from "effect/Predicate";
 import * as PubSub from "effect/PubSub";
+import * as Result from "effect/Result";
 import * as Schema from "effect/Schema";
 import * as SchemaIssue from "effect/SchemaIssue";
 import * as SchemaTransformation from "effect/SchemaTransformation";
@@ -538,9 +539,11 @@ const makeKeybindings = Effect.gen(function* () {
         return;
       }
 
-      const matchingDefaults = DEFAULT_KEYBINDINGS.filter((defaultRule) =>
-        customConfig.some((entry) => isSameKeybindingRule(entry, defaultRule)),
-      ).map((rule) => rule.command);
+      const matchingDefaults = Array.filterMap(DEFAULT_KEYBINDINGS, (defaultRule) =>
+        customConfig.some((entry) => isSameKeybindingRule(entry, defaultRule))
+          ? Result.succeed(defaultRule.command)
+          : Result.failVoid,
+      );
       if (matchingDefaults.length > 0) {
         yield* Effect.logWarning("default keybinding rule already defined in user config", {
           path: keybindingsConfigPath,

apps/server/src/orchestration/Layers/CheckpointReactor.ts

@@ -1,5 +1,6 @@
 import {
   CommandId,
+  type CheckpointRef,
   EventId,
   MessageId,
   type ProjectId,
@@ -701,9 +702,12 @@ const make = Effect.gen(function* () {
       });
     }
 
-    const staleCheckpointRefs = thread.checkpoints
-      .filter((checkpoint) => checkpoint.checkpointTurnCount > event.payload.turnCount)
-      .map((checkpoint) => checkpoint.checkpointRef);
+    const staleCheckpointRefs: Array<CheckpointRef> = [];
+    for (const checkpoint of thread.checkpoints) {
+      if (checkpoint.checkpointTurnCount > event.payload.turnCount) {
+        staleCheckpointRefs.push(checkpoint.checkpointRef);
+      }
+    }
 
     if (staleCheckpointRefs.length > 0) {
       yield* checkpointStore.deleteCheckpointRefs({

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

@@ -537,12 +537,15 @@ const makeOrchestrationProjectionPipeline = Effect.fn("makeOrchestrationProjecti
         projectionPendingApprovalRepository.listByThreadId({ threadId }),
       ]);
 
-      const latestUserMessageAt =
-        messages
-          .filter((message) => message.role === "user")
-          .map((message) => message.createdAt)
-          .toSorted()
-          .at(-1) ?? null;
+      let latestUserMessageAt: string | null = null;
+      for (const message of messages) {
+        if (
+          message.role === "user" &&
+          (latestUserMessageAt === null || message.createdAt > latestUserMessageAt)
+        ) {
+          latestUserMessageAt = message.createdAt;
+        }
+      }
 
       const pendingApprovalCount = pendingApprovals.filter(
         (approval) => approval.status === "pending",

apps/server/src/orchestration/Layers/ProjectionSnapshotQuery.ts

@@ -24,9 +24,11 @@ import {
   ProjectId,
   ThreadId,
 } from "@t3tools/contracts";
+import * as Arr from "effect/Array";
 import * as Effect from "effect/Effect";
 import * as Layer from "effect/Layer";
 import * as Option from "effect/Option";
+import * as Result from "effect/Result";
 import * as Schema from "effect/Schema";
 import * as Struct from "effect/Struct";
 import * as SqlClient from "effect/unstable/sql/SqlClient";
@@ -1488,34 +1490,36 @@ const makeProjectionSnapshotQuery = Effect.gen(function* () {
 
             const snapshot = {
               snapshotSequence: computeSnapshotSequence(stateRows),
-              projects: projectRows
-                .filter((row) => row.deletedAt === null)
-                .map((row) =>
-                  mapProjectShellRow(row, repositoryIdentities.get(row.projectId) ?? null),
-                ),
-              threads: threadRows
-                .filter((row) => row.deletedAt === null)
-                .map(
-                  (row): OrchestrationThreadShell => ({
-                    id: row.threadId,
-                    projectId: row.projectId,
-                    title: row.title,
-                    modelSelection: row.modelSelection,
-                    runtimeMode: row.runtimeMode,
-                    interactionMode: row.interactionMode,
-                    branch: row.branch,
-                    worktreePath: row.worktreePath,
-                    latestTurn: latestTurnByThread.get(row.threadId) ?? null,
-                    createdAt: row.createdAt,
-                    updatedAt: row.updatedAt,
-                    archivedAt: row.archivedAt,
-                    session: sessionByThread.get(row.threadId) ?? null,
-                    latestUserMessageAt: row.latestUserMessageAt,
-                    hasPendingApprovals: row.pendingApprovalCount > 0,
-                    hasPendingUserInput: row.pendingUserInputCount > 0,
-                    hasActionableProposedPlan: row.hasActionableProposedPlan > 0,
-                  }),
-                ),
+              projects: Arr.filterMap(projectRows, (row) =>
+                row.deletedAt === null
+                  ? Result.succeed(
+                      mapProjectShellRow(row, repositoryIdentities.get(row.projectId) ?? null),
+                    )
+                  : Result.failVoid,
+              ),
+              threads: Arr.filterMap(threadRows, (row) =>
+                row.deletedAt === null
+                  ? Result.succeed({
+                      id: row.threadId,
+                      projectId: row.projectId,
+                      title: row.title,
+                      modelSelection: row.modelSelection,
+                      runtimeMode: row.runtimeMode,
+                      interactionMode: row.interactionMode,
+                      branch: row.branch,
+                      worktreePath: row.worktreePath,
+                      latestTurn: latestTurnByThread.get(row.threadId) ?? null,
+                      createdAt: row.createdAt,
+                      updatedAt: row.updatedAt,
+                      archivedAt: row.archivedAt,
+                      session: sessionByThread.get(row.threadId) ?? null,
+                      latestUserMessageAt: row.latestUserMessageAt,
+                      hasPendingApprovals: row.pendingApprovalCount > 0,
+                      hasPendingUserInput: row.pendingUserInputCount > 0,
+                      hasActionableProposedPlan: row.hasActionableProposedPlan > 0,
+                    } satisfies OrchestrationThreadShell)
+                  : Result.failVoid,
+              ),
               updatedAt: updatedAt ?? "1970-01-01T00:00:00.000Z",
             };
 
@@ -1621,11 +1625,13 @@ const makeProjectionSnapshotQuery = Effect.gen(function* () {
 
             const snapshot = {
               snapshotSequence: computeSnapshotSequence(stateRows),
-              projects: projectRows
-                .filter((row) => row.deletedAt === null && activeProjectIds.has(row.projectId))
-                .map((row) =>
-                  mapProjectShellRow(row, repositoryIdentities.get(row.projectId) ?? null),
-                ),
+              projects: Arr.filterMap(projectRows, (row) =>
+                row.deletedAt === null && activeProjectIds.has(row.projectId)
+                  ? Result.succeed(
+                      mapProjectShellRow(row, repositoryIdentities.get(row.projectId) ?? null),
+                    )
+                  : Result.failVoid,
+              ),
               threads: threadRows.map(
                 (row): OrchestrationThreadShell => ({
                   id: row.threadId,

apps/server/src/provider/Layers/ClaudeAdapter.ts

@@ -245,9 +245,13 @@ function toProcessError(
 function normalizeClaudeStreamMessages(
   cause: Cause.Cause<{ readonly message: string }>,
 ): ReadonlyArray<string> {
-  const errors = Cause.prettyErrors(cause)
-    .map((error) => error.message.trim())
-    .filter((message) => message.length > 0);
+  const errors: Array<string> = [];
+  for (const error of Cause.prettyErrors(cause)) {
+    const message = error.message.trim();
+    if (message.length > 0) {
+      errors.push(message);
+    }
+  }
   if (errors.length > 0) {
     return errors;
   }

apps/server/src/provider/Layers/ClaudeProvider.ts

@@ -317,11 +317,13 @@ export function resolveClaudeApiModelId(modelSelection: ModelSelection): string
 }
 
 function toTitleCaseWords(value: string): string {
-  return value
-    .split(/[\s_-]+/g)
-    .filter(Boolean)
-    .map((part) => part[0]!.toUpperCase() + part.slice(1).toLowerCase())
-    .join(" ");
+  const parts: Array<string> = [];
+  for (const part of value.split(/[\s_-]+/g)) {
+    if (part.length > 0) {
+      parts.push(part[0]!.toUpperCase() + part.slice(1).toLowerCase());
+    }
+  }
+  return parts.join(" ");
 }
 
 function claudeSubscriptionLabel(subscriptionType: string | undefined): string | undefined {

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

@@ -319,16 +319,21 @@ const probeCodexAppServerProvider = Effect.fn("probeCodexAppServerProvider")(fun
   } satisfies CodexAppServerProviderSnapshot;
 });
 
-const emptyCodexModelsFromSettings = (codexSettings: CodexSettings): ServerProvider["models"] =>
-  codexSettings.customModels
-    .map((model) => model.trim())
-    .filter((model, index, models) => model.length > 0 && models.indexOf(model) === index)
-    .map((model) => ({
-      slug: model,
-      name: model,
-      isCustom: true,
-      capabilities: null,
-    }));
+const emptyCodexModelsFromSettings = (codexSettings: CodexSettings): ServerProvider["models"] => {
+  const models = new Set<string>();
+  for (const model of codexSettings.customModels) {
+    const trimmed = model.trim();
+    if (trimmed.length > 0) {
+      models.add(trimmed);
+    }
+  }
+  return Array.from(models, (model) => ({
+    slug: model,
+    name: model,
+    isCustom: true,
+    capabilities: null,
+  }));
+};
 
 const makePendingCodexProvider = (
   codexSettings: CodexSettings,

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

@@ -596,11 +596,12 @@ export const discoverCursorModelCapabilitiesViaAcp = (
           );
         }
 
-        const targetModelSlugs = new Set(
-          existingModels
-            .filter((model) => !model.isCustom && !hasCursorModelCapabilities(model))
-            .map((model) => model.slug),
-        );
+        const targetModelSlugs = new Set<string>();
+        for (const model of existingModels) {
+          if (!model.isCustom && !hasCursorModelCapabilities(model)) {
+            targetModelSlugs.add(model.slug);
+          }
+        }
         if (targetModelSlugs.size === 0) {
           return buildCursorDiscoveredModels(
             modelChoices.map((modelChoice) => ({
@@ -721,9 +722,13 @@ export interface CursorAboutResult {
 }
 
 function joinProviderMessages(...messages: ReadonlyArray<string | undefined>): string | undefined {
-  const parts = messages
-    .map((message) => message?.trim())
-    .filter((message): message is string => Boolean(message));
+  const parts: Array<string> = [];
+  for (const message of messages) {
+    const trimmed = message?.trim();
+    if (trimmed) {
+      parts.push(trimmed);
+    }
+  }
   return parts.length > 0 ? parts.join(" ") : undefined;
 }
 
@@ -790,11 +795,13 @@ export function parseCursorCliConfigChannel(raw: string): string | undefined {
 }
 
 function toTitleCaseWords(value: string): string {
-  return value
-    .split(/[\s_-]+/g)
-    .filter((part) => part.length > 0)
-    .map((part) => part.charAt(0).toUpperCase() + part.slice(1).toLowerCase())
-    .join(" ");
+  const parts: Array<string> = [];
+  for (const part of value.split(/[\s_-]+/g)) {
+    if (part.length > 0) {
+      parts.push(part.charAt(0).toUpperCase() + part.slice(1).toLowerCase());
+    }
+  }
+  return parts.join(" ");
 }
 
 function cursorSubscriptionLabel(subscriptionType: string | undefined): string | undefined {

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

@@ -1366,12 +1366,15 @@ export function makeOpenCodeAdapter(
           }),
         ).pipe(Effect.mapError(toRequestError));
 
-        const turns = (messages.data ?? [])
-          .filter((entry) => entry.info.role === "assistant")
-          .map((entry) => ({
-            id: TurnId.make(entry.info.id),
-            items: [entry.info, ...entry.parts],
-          }));
+        const turns: Array<OpenCodeTurnSnapshot> = [];
+        for (const entry of messages.data ?? []) {
+          if (entry.info.role === "assistant") {
+            turns.push({
+              id: TurnId.make(entry.info.id),
+              items: [entry.info, ...entry.parts],
+            });
+          }
+        }
 
         return {
           threadId,