refactor(session): replace compactorNoOpFloor with a constant

src/agent/compaction.test.ts

@@ -24,7 +24,7 @@ import {
 import {
   COMPACT_SPACER_TEXT,
   LEGACY_COMPACT_SPACER_TEXT,
-  compactorNoOpFloor,
+  COMPACT_NOOP_FLOOR,
 } from "../session/compactor.js";
 import { buildSummaryPrompt } from "../session/summarizer.js";
 
@@ -509,7 +509,7 @@ describe("compaction governor", () => {
 
   test("never arms at the exact turn count createPruningCompactor no-ops on", () => {
     // The compactor's own no-op floor; arming at or below it spends a cycle that shrinks nothing.
-    const floor = compactorNoOpFloor();
+    const floor = COMPACT_NOOP_FLOOR;
     const governor = createCompactionGovernor(() => undefined);
     governor.noteInferenceDone(
       inferenceDone(overThreshold),
@@ -521,7 +521,7 @@ describe("compaction governor", () => {
   });
 
   test("arms one turn past the floor createPruningCompactor no-ops on", () => {
-    const floor = compactorNoOpFloor();
+    const floor = COMPACT_NOOP_FLOOR;
     const governor = createCompactionGovernor(() => undefined);
     governor.noteInferenceDone(
       inferenceDone(overThreshold),

src/agent/compaction.ts

@@ -14,7 +14,7 @@ import {
 } from "../provider/context-window.js";
 import {
   assistantTextIsCompactSpacerEcho,
-  compactorNoOpFloor,
+  COMPACT_NOOP_FLOOR,
   isCompactSpacerEchoTurn,
 } from "../session/compactor.js";
 import {
@@ -24,9 +24,9 @@ import {
 import { onTurnBoundary } from "./reactor-events.js";
 
 const COMPACTOR_NAME = "pruning-compactor";
-// Compactor no-op floor, from the same helper so it cannot drift; arming
+// Compactor no-op floor, shared from the compactor so it cannot drift; arming
 // at or below spends a cycle that shrinks nothing.
-const MIN_TURNS_TO_COMPACT = compactorNoOpFloor();
+const MIN_TURNS_TO_COMPACT = COMPACT_NOOP_FLOOR;
 // Cap overflow retries so an unshrinkable history cannot loop forever;
 // cleared once usage drops back under the watermark.
 const MAX_OVERFLOW_RECOVERIES = 2;

src/agent/director.test.ts

@@ -23,7 +23,7 @@ import { createPermissionGate } from "../permission/gate.js";
 import {
   COMPACT_SPACER_TEXT,
   LEGACY_COMPACT_SPACER_TEXT,
-  compactorNoOpFloor,
+  COMPACT_NOOP_FLOOR,
 } from "../session/compactor.js";
 import {
   INFERENCE_ABORT_INTERNAL_RECOVERY,
@@ -785,7 +785,7 @@ function makeToolErrorEvent(callId: string, content: string) {
 // One turn past the compactor's no-op floor (session/compactor.ts), so the
 // arming check finds history actually worth compacting.
 const longState = {
-  turns: Array.from({ length: compactorNoOpFloor() + 1 }, () => ({
+  turns: Array.from({ length: COMPACT_NOOP_FLOOR + 1 }, () => ({
     role: "user",
     content: [],
     timestamp: 0,

src/context-compactor.test.ts

@@ -2,7 +2,7 @@ import { defined } from "../testkit/defined.js";
 import { describe, test, expect } from "bun:test";
 import {
   createPruningCompactor,
-  compactorNoOpFloor,
+  COMPACT_NOOP_FLOOR,
   buildTurnSummary,
   COMPACTED_PREFIX,
   COMPACT_SPACER_TEXT,
@@ -93,15 +93,15 @@ describe("createPruningCompactor", () => {
     expect(result.output).toBe(turns); // Same reference when no compaction needed
   });
 
-  test("compactorNoOpFloor names the exact turn count apply() no-ops on", async () => {
-    // The compaction governor derives its arming floor from this function so
+  test("COMPACT_NOOP_FLOOR names the exact turn count apply() no-ops on", async () => {
+    // The compaction governor derives its arming floor from this constant so
     // it never arms a compaction guaranteed to no-op; changing apply()'s
     // no-op condition without updating the floor breaks that guarantee
     // silently.
     const compactor = smallCompactor({
       summaryMaxChars: 500,
     });
-    const floor = compactorNoOpFloor();
+    const floor = COMPACT_NOOP_FLOOR;
 
     // Bodies exceed the pinned tail budget, so past-floor always has a folded
     // region while at-floor still no-ops on the count check alone.

src/session/compactor.ts

@@ -112,9 +112,7 @@ function extraInstructionParameter(
 }
 
 // `apply` no-ops at or below this turn count: one turn cannot shrink.
-export function compactorNoOpFloor(): number {
-  return 1;
-}
+export const COMPACT_NOOP_FLOOR = 1;
 
 // Query tools dedup by full-argument identity: a later identical call
 // reflects newer workspace state, so older results are stale. run_shell is
@@ -884,7 +882,7 @@ export function createPruningCompactor(
       // Prior compacted summaries fold into the next handoff, not frozen.
       const shape = resolveCompactionShape(cfg.compactionShape);
 
-      if (turns.length <= compactorNoOpFloor()) {
+      if (turns.length <= COMPACT_NOOP_FLOOR) {
         return {
           output: turns,
           record: {

src/subagent/nudge-director.test.ts

@@ -6,7 +6,7 @@ import type {
   ReactorState,
 } from "@intx/types/runtime";
 import { createCorbitsRetryPolicy } from "../agent/retry-policy.js";
-import { compactorNoOpFloor } from "../session/compactor.js";
+import { COMPACT_NOOP_FLOOR } from "../session/compactor.js";
 import { SubAgentDirector } from "./nudge-director.js";
 import type { AdmissionQueue } from "./admission.js";
 import { createTestCapabilities } from "./director-test-harness.js";
@@ -19,7 +19,7 @@ import {
 
 const state = { turns: [] } as unknown as ReactorState;
 const longState = {
-  turns: Array.from({ length: compactorNoOpFloor() + 1 }, () => ({
+  turns: Array.from({ length: COMPACT_NOOP_FLOOR + 1 }, () => ({
     role: "user",
     content: [],
     timestamp: 0,