Merge branch 'codex/goal-session' into codex/commands

# Conflicts:
#	docs/architecture.md
#	docs/capability-seams.md
#	docs/config-catalog.md
#	docs/module-graph.md
#	knip.json
#	packages/examples/README.md
#	packages/examples/stdio-demo/README.md
#	packages/examples/stdio-demo/src/index.ts
#	packages/examples/tui-demo/package.json
#	packages/ui/README.md
#	packages/ui/tui/src/index.ts

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

@@ -16,7 +16,10 @@ import CommandService from '@deepseek-ai/dsh-commands'
 import * as agentCore from '@deepseek-ai/dsh-agent-spine-demo'
 import * as workspaceContext from '@deepseek-ai/dsh-workspace-context'
 import ToolRegistry, { type Config as ToolsConfig } from '@deepseek-ai/dsh-tools'
-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'
 
 export const name = 'acp-demo'
@@ -48,6 +51,8 @@ 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
   /** Controls automatic AGENTS.md/CLAUDE.md loading; configure a byte budget or set `false`. */
   workspaceContext: agentCore.Config['workspaceContext']
   /** Skill registry, local-provider, and model-facing consumer config forwarded to agent-spine-demo. */
@@ -73,6 +78,7 @@ export const Config: z<Config> = z.object({
   tools: ToolRegistry.Config,
   dshHome: z.string(),
   persistenceRoot: z.string().default(DEFAULT_PERSISTENCE_ROOT),
+  persistenceCompression: JsonlCompressionSchema,
   workspaceContext: z.union([z.const(false), workspaceContext.Config]).required(),
   skills: agentCore.SkillConfigSchema,
   toolBash: agentCore.ToolBashConfigSchema,
@@ -91,6 +97,9 @@ export function apply(ctx: Context, config: Config): void {
   ctx.plugin(CommandService)
   ctx.plugin(agentCore, agentCore.pickSpineConfig(config))
   ctx.plugin(UserInteractionService)
-  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(acp, { provider: config.provider, model: config.model })
 }