fix(tmux): prefer split-or-defer with FIFO deferred attach

2026-02-15 03:26:39 +08:00
parent f3c8b0d098
commit 541f0d354d
14 changed files with 1156 additions and 227 deletions
@@ -0,0 +1,145 @@
+import { describe, expect, it } from "bun:test"
+import { decideSpawnActions, findSpawnTarget, type SessionMapping } from "./decision-engine"
+import type { CapacityConfig, WindowState } from "./types"
+
+function createState(
+  windowWidth: number,
+  windowHeight: number,
+  agentPanes: WindowState["agentPanes"],
+): WindowState {
+  return {
+    windowWidth,
+    windowHeight,
+    mainPane: {
+      paneId: "%0",
+      width: Math.floor(windowWidth / 2),
+      height: windowHeight,
+      left: 0,
+      top: 0,
+      title: "main",
+      isActive: true,
+    },
+    agentPanes,
+  }
+}
+
+describe("tmux layout-aware split behavior", () => {
+  it("uses -v for first spawn in main-horizontal layout", () => {
+    const config: CapacityConfig = {
+      layout: "main-horizontal",
+      mainPaneSize: 60,
+      mainPaneMinWidth: 120,
+      agentPaneWidth: 40,
+    }
+    const state = createState(220, 44, [])
+
+    const decision = decideSpawnActions(state, "ses-1", "agent", config, [])
+
+    expect(decision.canSpawn).toBe(true)
+    expect(decision.actions[0]).toMatchObject({
+      type: "spawn",
+      splitDirection: "-v",
+    })
+  })
+
+  it("uses -h for first spawn in main-vertical layout", () => {
+    const config: CapacityConfig = {
+      layout: "main-vertical",
+      mainPaneSize: 60,
+      mainPaneMinWidth: 120,
+      agentPaneWidth: 40,
+    }
+    const state = createState(220, 44, [])
+
+    const decision = decideSpawnActions(state, "ses-1", "agent", config, [])
+
+    expect(decision.canSpawn).toBe(true)
+    expect(decision.actions[0]).toMatchObject({
+      type: "spawn",
+      splitDirection: "-h",
+    })
+  })
+
+  it("prefers horizontal split target in main-horizontal layout", () => {
+    const config: CapacityConfig = {
+      layout: "main-horizontal",
+      mainPaneSize: 60,
+      mainPaneMinWidth: 120,
+      agentPaneWidth: 40,
+    }
+    const state = createState(260, 60, [
+      {
+        paneId: "%1",
+        width: 120,
+        height: 30,
+        left: 0,
+        top: 30,
+        title: "agent",
+        isActive: false,
+      },
+    ])
+
+    const target = findSpawnTarget(state, config)
+
+    expect(target).toEqual({ targetPaneId: "%1", splitDirection: "-h" })
+  })
+
+  it("defers when strict main-horizontal cannot split", () => {
+    const config: CapacityConfig = {
+      layout: "main-horizontal",
+      mainPaneSize: 60,
+      mainPaneMinWidth: 120,
+      agentPaneWidth: 40,
+    }
+    const state = createState(220, 44, [
+      {
+        paneId: "%1",
+        width: 60,
+        height: 44,
+        left: 0,
+        top: 22,
+        title: "old",
+        isActive: false,
+      },
+    ])
+    const mappings: SessionMapping[] = [
+      { sessionId: "old-ses", paneId: "%1", createdAt: new Date("2024-01-01") },
+    ]
+
+    const decision = decideSpawnActions(state, "new-ses", "agent", config, mappings)
+
+    expect(decision.canSpawn).toBe(false)
+    expect(decision.actions).toHaveLength(0)
+    expect(decision.reason).toContain("defer")
+  })
+
+  it("still spawns in narrow main-vertical when vertical split is possible", () => {
+    const config: CapacityConfig = {
+      layout: "main-vertical",
+      mainPaneSize: 60,
+      mainPaneMinWidth: 120,
+      agentPaneWidth: 40,
+    }
+    const state = createState(169, 40, [
+      {
+        paneId: "%1",
+        width: 48,
+        height: 40,
+        left: 121,
+        top: 0,
+        title: "agent",
+        isActive: false,
+      },
+    ])
+
+    const decision = decideSpawnActions(state, "new-ses", "agent", config, [])
+
+    expect(decision.canSpawn).toBe(true)
+    expect(decision.actions).toHaveLength(1)
+    expect(decision.actions[0]).toMatchObject({
+      type: "spawn",
+      targetPaneId: "%1",
+      splitDirection: "-v",
+    })
+  })
+})