fix(cli): preserve active query access

examples/headless-agent/tests/fixtures/telemetry-otel.cordis.yml

@@ -8,6 +8,9 @@
 - id: telemetry-redact-rule
   name: './telemetry-redact-rule.ts'
 
+- id: subprocess
+  name: '@deepseek-ai/dsh-subprocess-local'
+
 - id: bash
   name: '@deepseek-ai/dsh-bash-local'
 

packages/ui/tui/src/index.ts

@@ -19,7 +19,7 @@ import {
   type SlashCommand,
   type TerminalColorScheme,
 } from '@earendil-works/pi-tui'
-import { Service, type Context, type Fiber } from 'cordis'
+import { Service, type Context, type Fiber, type FiberState } from 'cordis'
 import {
   assembleContextFor,
   installAgentLlmTarget,
@@ -55,6 +55,7 @@ import {
   TuiExtensionServiceImpl,
   TuiOverlayManager,
 } from './extension/overlay-manager.ts'
+
 import {
   parseTuiPromptTemplate,
   renderTuiPromptTemplate,
@@ -170,6 +171,9 @@ export type {
   TuiViewport,
 } from './extension/types.ts'
 
+/** First terminal Cordis state: FAILED, DISPOSED, and UNLOADING are unusable. */
+const FIBER_FAILED = 3 as FiberState.FAILED
+
 declare module 'cordis' {
   interface Context {
     /** Terminal-only interaction service, available only while a TUI is mounted. */
@@ -840,10 +844,14 @@ export function createTuiChat(
     resolved,
     palette,
     overlayManager,
-    // Optional and independently mounted: read at each use so config row order
+    // Optional and independently mounted. Cordis transiently leaves this sibling
-    // cannot decide whether /resume works. Strict lookup excludes a closing or
+    // non-ACTIVE during command callbacks, so the non-strict read is intentional;
-    // closed provider rather than dispatching into a stale SQLite handle.
+    // terminal fiber states still exclude failed, closing, and closed providers.
-    sessionQuery: () => ctx.get('sessionQuery'),
+    sessionQuery: () => {
+      const implementation = ctx.reflect._getImpl('sessionQuery', false)
+      if (implementation === undefined || implementation.fiber.state >= FIBER_FAILED) return undefined
+      return ctx.get('sessionQuery', false)
+    },
     ui,
     editor,
     appendNotice,

packages/ui/tui/tests/tui.spec.ts

@@ -2,7 +2,7 @@ import { mkdir, mkdtemp, rm, writeFile } from 'node:fs/promises'
 import { homedir, tmpdir } from 'node:os'
 import { join, resolve } from 'node:path'
 import { describe, expect, it, vi } from 'vitest'
-import { Context } from 'cordis'
+import { Context, type FiberState } from 'cordis'
 import { CombinedAutocompleteProvider, visibleWidth, type Terminal } from '@earendil-works/pi-tui'
 import AgentRegistry, {
   agentEvents, assembleContextFor, InboxItemId, type Agent, type InboxItem,
@@ -503,7 +503,7 @@ describe('goodbye message and /resume', () => {
     await dispose(result)
   })
 
-  it('treats a closed session-query provider as unavailable', async () => {
+  it('treats a terminal-state session-query provider as unavailable', async () => {
     let queryCtx: Context | undefined
     const result = await setup({
       cwd: '/workspace',
@@ -518,12 +518,15 @@ describe('goodbye message and /resume', () => {
         })
       },
     })
-    await queryCtx!.fiber.dispose()
+    if (queryCtx === undefined) throw new Error('query provider did not mount')
+    const activeState = queryCtx.fiber.state
+    queryCtx.fiber.state = 5
     result.terminal.send('/resume')
     result.terminal.send('\r')
     await tick()
     expect(result.terminal.output).toContain('session query is not mounted')
     expect(result.terminal.output).not.toContain('closed database')
+    queryCtx.fiber.state = activeState
     await dispose(result)
   })