docs: rebalance prose cleanup and add trimming skill

packages/bash/bash-sandbox/tests/bwrap.e2e.ts

@@ -9,9 +9,13 @@ import { bwrapProfileArgs, LocalSandboxProvider } from '@deepseek-ai/dsh-sandbox
 import { SandboxBashExecutor } from '@deepseek-ai/dsh-bash-sandbox'
 
 /**
- * Keyless consumer-integration proof under bwrap: the real `LocalSandboxProvider` (nothing
- * forced — bwrap is the ladder's first rung, so a passing probe selects it) underneath the
- * real `SandboxBashExecutor`, driven through the executor's public run/start paths.
+ * Keyless integration of the real provider and executor through public run/start paths. With
+ * no rung forced, a passing bwrap probe selects the ladder's first rung. The tests check world
+ * effects and stamped facts, including EROFS classification through the wrap-carried dialect;
+ * backend-only confinement is covered by `@deepseek-ai/dsh-sandbox-local`.
+ *
+ * Skips when bwrap or unprivileged user namespaces are unavailable. HOME-based paths are
+ * intentional because bwrap replaces `/tmp`, which cannot prove the workspace-root boundary.
  */
 
 const probe = spawnSync('bwrap', [...bwrapProfileArgs({ mode: 'read-only', workspaceRoot: '/' }), '--', 'true'], { timeout: 5_000, stdio: 'ignore' })

packages/bash/bash-sandbox/tests/sandbox.spec.ts

@@ -1,5 +1,8 @@
 /**
- * SandboxBashExecutor tests: the CONSUMER side of the sandbox seam.
+ * Consumer-side `SandboxBashExecutor` tests. A fake Cordis sandbox service makes wrapping,
+ * policy hand-off, fail-closed propagation, classification, and fact stamping deterministic;
+ * real-provider integration lives in `tests/landlock.e2e.ts`. A mode-0555 directory supplies
+ * the Unix denial signature used by the classifier without requiring a real sandbox runner.
  */
 
 import { chmodSync, mkdirSync, mkdtempSync } from 'node:fs'
@@ -280,7 +283,9 @@ describe('background sandbox facts', () => {
   })
 
   it('overlapping background tasks keep their OWN wrap facts (per-task, not latest-wrap)', async () => {
-    // The seam returns facts per WRAP — a legal provider may vary them between calls.
+    // Facts belong to each wrap and may vary between calls. The slow task settles after the
+    // quick task starts; a shared latest-wrap field would classify and stamp it with the wrong
+    // task's dialect and enforcement.
     const wraps: Array<Pick<ConfinedArgv, 'enforcement' | 'denialSignatures'>> = [
       { enforcement: 'partial', denialSignatures: ['permission denied'] },
       { enforcement: 'full', denialSignatures: ['read-only file system'] },

packages/bash/bash-sandbox/tests/seatbelt.e2e.ts

@@ -9,8 +9,11 @@ import { LocalSandboxProvider, seatbeltProfileArgs } from '@deepseek-ai/dsh-sand
 import { SandboxBashExecutor } from '@deepseek-ai/dsh-bash-sandbox'
 
 /**
- * Keyless macOS integration of the real Seatbelt provider and sandbox executor,
- * including world effects and denial classification. Skips when the probe fails.
+ * Keyless macOS integration of the real provider and executor through public run/start paths.
+ * Linux rungs are forced off so Seatbelt is selected. The tests check world effects and stamped
+ * facts, including EPERM classification through the wrap-carried dialect; backend-only
+ * confinement is covered by `@deepseek-ai/dsh-sandbox-local`. Skips off macOS or when
+ * `sandbox-exec` rejects the profile.
  */
 
 const probe = spawnSync('sandbox-exec', [...seatbeltProfileArgs({ mode: 'read-only', workspaceRoot: '/' }), '--', 'true'], { timeout: 5_000, stdio: 'ignore' })