Merge remote-tracking branch 'origin/master' into codex/remove-stdio-agent

# Conflicts:
#	AGENTS.md
#	docs/config-catalog.md
#	examples/echo-agent/README.md
#	packages/examples/stdio-demo/README.md
#	packages/examples/stdio-demo/src/index.ts
#	packages/examples/stdio-demo/tests/built-bin.e2e.ts
#	packages/examples/stdio-demo/tests/stdio-agent.spec.ts
#	scripts/run-gates.ts

packages/examples/tui-demo/README.md

@@ -32,6 +32,7 @@ Swappable LLM, bash, filesystem, and other capability providers remain in the le
 | `toolTasks` | owner defaults | Background-task control-tool config, or `false` |
 | `workspaceContext` | required | Workspace-instruction config, or `false` |
 | `persistenceRoot` | `./.sessions` | JSONL persistence root |
+| `persistenceCompression` | `'zstd'` | JSONL artifact encoding (`'zstd'` or raw `'none'`) |
 | `welcome` | `ready.` | TUI subtitle |
 | `ui` | owner defaults | TUI presentation settings such as reasoning, color, and card height |
 | `resumeSessionId` | — | Exact persisted session to resume |

packages/examples/tui-demo/src/index.ts

@@ -15,7 +15,10 @@ import { SessionId } from '@deepseek-ai/dsh-session'
 import ToolRegistry, { type Config as ToolsConfig } from '@deepseek-ai/dsh-tools'
 import * as agentCore from '@deepseek-ai/dsh-agent-spine-demo'
 import * as workspaceContext from '@deepseek-ai/dsh-workspace-context'
-import SessionPersistenceJsonl from '@deepseek-ai/dsh-session-persistence-jsonl'
+import SessionPersistenceJsonl, {
+  JsonlCompressionSchema,
+  type JsonlCompression,
+} from '@deepseek-ai/dsh-session-persistence-jsonl'
 import UserInteractionService from '@deepseek-ai/dsh-user-interaction'
 import * as toolAskUser from '@deepseek-ai/dsh-tool-ask-user'
 import * as uiTui from '@deepseek-ai/dsh-tui'
@@ -42,6 +45,8 @@ export interface Config {
   dshHome?: string
   /** Directory the JSONL session backend writes under. Defaults to `./.sessions`. */
   persistenceRoot?: string
+  /** JSONL artifact encoding; defaults to checksummed Zstandard frames. */
+  persistenceCompression?: JsonlCompression
   /** TUI subtitle rendered on start. Defaults to `ready.`. */
   welcome?: string
   /** Full-screen TUI presentation settings. */
@@ -71,6 +76,7 @@ export const Config: z<Config> = z.object({
   tools: ToolRegistry.Config,
   dshHome: z.string(),
   persistenceRoot: z.string().default(DEFAULT_PERSISTENCE_ROOT),
+  persistenceCompression: JsonlCompressionSchema,
   welcome: z.string().default(DEFAULT_WELCOME),
   ui: uiTui.TuiConfigSchema,
   skills: agentCore.SkillConfigSchema,
@@ -91,7 +97,10 @@ export const Config: z<Config> = z.object({
 export function composeTuiApp(ctx: Context, config: Config): void {
   const resumeSessionId = config.resumeSessionId === '' ? undefined : config.resumeSessionId
   const sessionId = SessionId(resumeSessionId ?? `main-session-${randomUUID()}`)
-  ctx.plugin(SessionPersistenceJsonl, { root: config.persistenceRoot ?? DEFAULT_PERSISTENCE_ROOT })
+  ctx.plugin(SessionPersistenceJsonl, {
+    root: config.persistenceRoot ?? DEFAULT_PERSISTENCE_ROOT,
+    ...(config.persistenceCompression === undefined ? {} : { compression: config.persistenceCompression }),
+  })
   ctx.plugin(UserInteractionService)
   ctx.plugin(uiTui, {
     ...config.ui,

packages/examples/tui-demo/tests/tui-agent.spec.ts

@@ -31,6 +31,7 @@ describe('dsh-tui-demo app', () => {
       tools: { mode: 'code' },
       dshHome: '/tmp/dsh-home',
       persistenceRoot: '/tmp/tui-sessions',
+      persistenceCompression: 'none',
       welcome: 'TUI ready',
       ui: { color: false, maxToolOutputLines: 3 },
       skills: { tool: { catalogDescriptionMaxLength: 8 } },
@@ -46,7 +47,7 @@ describe('dsh-tui-demo app', () => {
       'agent-spine-demo',
       'tool-ask-user',
     ])
-    expect(calls[0]?.config).toEqual({ root: '/tmp/tui-sessions' })
+    expect(calls[0]?.config).toEqual({ root: '/tmp/tui-sessions', compression: 'none' })
     const tuiConfig = calls[2]?.config as { sessionId: string }
     expect(tuiConfig).toMatchObject({ welcome: 'TUI ready', color: false, maxToolOutputLines: 3 })
     expect(tuiConfig.sessionId).toMatch(/^main-session-[0-9a-f-]{36}$/)