refactor: prune bash implementation surface

packages/bash/tool-bash/src/index.ts

@@ -68,7 +68,8 @@ import type {} from '@deepseek-ai/dsh-system-prompt'
 import type {} from '@deepseek-ai/dsh-user-approval'
 import type { SandboxMode } from '@deepseek-ai/dsh-sandbox'
 import { BashTaskId, OwnerToken, effectiveSandboxMode } from '@deepseek-ai/dsh-bash'
-import type { BashRunResult, BashTask, CollectedOutput } from '@deepseek-ai/dsh-bash'
+import type { BashTask } from '@deepseek-ai/dsh-bash'
+import { renderResult } from './render.ts'
 
 export const name = 'tool-bash'
 export const inject = ['tools', 'bash', 'systemPrompt']
@@ -185,68 +186,6 @@ function bashDescription(escalationModes: readonly SandboxMode[]): string {
     + 'it — but it does not forbid attempting or escalating other commands later.'
 }
 
-/** Append the truncation notice (with the full-output spill path) to a stream's text. */
-function streamText(output: CollectedOutput): string {
-  if (!output.truncated) return output.text
-  return `${output.text}\n[output truncated; full output: ${output.spillPath ?? '(unavailable)'}]`
-}
-
-/**
- * Shape one finished run into the text the model sees: stdout, then a marked
- * stderr section, then exit-status markers. Non-zero exits are REPORTED, not
- * errored — the model decides how to react; only infrastructure failures
- * (spawn errors, aborts) surface as isError results.
- * @param result - the completed foreground run from the executor.
- * @param escalationModes - the escalation targets this composition advertises;
- *   non-empty adds the same-turn escalation hint after a denial marker
- *   (default `[]`: no hint).
- * @returns the model-facing text: output body (or `(no output)`), then any timeout/signal/exit markers, each on its own line.
- */
-export function renderResult(
-  result: BashRunResult,
-  escalationModes: readonly SandboxMode[] = [],
-): string {
-  const out = streamText(result.stdout)
-  const err = streamText(result.stderr)
-
-  let body = out
-  if (err.length > 0) {
-    // Single newline between sections (stdout usually ends with one already).
-    if (body.length > 0 && !body.endsWith('\n')) body += '\n'
-    body += `[stderr]\n${err}`
-  }
-  if (body.length === 0) body = '(no output)'
-
-  const markers: string[] = []
-  // The sandbox marker precedes the exit-status markers so `[exit code: N]`
-  // stays the LAST line (exitStatus() anchors its parse there). Denial is a
-  // reported fact like timeout: the model decides how to react.
-  if (result.sandbox?.denied) {
-    markers.push(`[sandbox: file access denied under ${result.sandbox.mode} mode]`)
-    // The same-turn nudge lives at the decision point: only when this
-    // composition advertises the fields (a lever is never hinted that the
-    // schema does not offer), and inside the sandbox marker family so the
-    // exit-code marker stays the last line.
-    if (escalationModes.length > 0) {
-      markers.push('[sandbox: escalation available — retry this exact command once with sandbox_permissions (the narrowest wider mode that suffices) + justification; the approval prompt asks the user]')
-    }
-  }
-  // Timeout is reported independently of how the process actually ended: a
-  // command can trap SIGTERM and exit 0 after our timer fired (e.g.
-  // `trap "exit 0" TERM; sleep 60`), giving timedOut:true / exitCode:0 /
-  // signal:null — the model must still see that the command was cut short.
-  if (result.timedOut) markers.push(`[timed out after ${result.timeoutMs}ms]`)
-  if (result.signal !== null) {
-    markers.push(`[killed by signal: ${result.signal}]`)
-  } else if (result.exitCode !== 0) {
-    markers.push(`[exit code: ${result.exitCode}]`)
-  }
-  if (markers.length === 0) return body
-
-  if (!body.endsWith('\n')) body += '\n'
-  return body + markers.join('\n')
-}
-
 // ---------------------------------------------------------------------------
 // UI presentation (tool-owned). These shape how a UI (e.g. the ACP bridge)
 // renders a bash call's pending and completed states. They are display-only and