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kingwl 88db403d9f Merge branch 'worktree-session-modes-rfc' (master: sandbox stack #169 , skills #109 , prompt snapshots #254 )

The stack rebases onto a moved master through its base branch. Beyond
mechanical unions (both branches' demo scripts, example rows, service
roles, tool lists, acp deps, doc budgets — each side fit alone, the
union needs the higher ceilings), three semantic reconciliations:

- The ACP bridge now carries BOTH per-session surfaces: the sandbox
  stack's config options + approval answerer and this branch's session
  modes; session/new and session/load advertise modes AND configOptions
  side by side.
- The feature matrix supersedes the sandbox stance per the RFC's
  second-lander rule: session/set_mode and current_mode_update flip to
  shipped-by-dsh-mode, config-option rows stay as #169 wrote them, and
  §6 records both landed features under the picker-to-modes /
  knobs-to-config-options division.
- The snapshot pin grammar (#254: one header snapshot + declared deltas
  + a Markdown prompt golden) gains a symmetric declaration for what a
  delta cannot express: expectedHeaderSnapshots — a plan-mode flip
  resorts the canonical tool list, so its widening lands as a second
  full snapshot, now its own Markdown section. The pin-less-class and
  model-turn-only-pin amendments carry over; new fixtures cover the
  extended writer paths, and the plan-acp-agent scenarios re-recorded
  under the merged composition (the app now bundles the skill tool)
  with the suite's refresh mode wired through.

2026-07-12 20:08:09 +08:00

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Examples

Runnable demos (not workspaces) that showcase how the harness is wired. Each example is now a thin leaf: a cordis.yml that picks the swappable backends (an LLM adapter, a bash executor), loads ONE app package, and may add optional product tools or demo-only mocks. The composition — the spine, the front-door cluster, and the boot glue — lives in the app packages (@deepseek-ai/dsh-stdio-agent, @deepseek-ai/dsh-acp-agent) and the @deepseek-ai/dsh-agent-core bundle they share. There is no start.ts; the demo:* scripts invoke each app package's bin.

echo-agent

A mock model + echo tool on the stdio chat app — the all-mock skeleton. The leaf swaps dsh-stdio-agent's LLM backend to a local mock-echo adapter and adds a local echo tool. Demonstrates:

A thin leaf cordis.yml loading the @deepseek-ai/dsh-stdio-agent app
Registering a mock LlmAdapter (streaming scripted responses)
Registering a tool via ctx.tools.register()
"Swap the backend, keep the app" — the only difference from coding-agent is the adapter

Run with: pnpm run demo:echo. When prompted, type "echo " to trigger a tool call round-trip.

coding-agent

A REPL agent demo: DeepSeek V4 + the read/write/edit filesystem tools + the bash tool suite, subagent delegation, and the todo_write task tracker on the same @deepseek-ai/dsh-stdio-agent app. The UI is a terminal readline REPL.

Run with: pnpm run demo:repl (needs DEEPSEEK_API_KEY in the environment or a gitignored repo-root .env). See coding-agent/README.md for details.

Its code-mode.cordis.yml overlay flips the same tree to Code Mode: the worker-thread code runtime is loaded and the tool registry runs mode: code, so the model gets exactly one wire tool — run_code — plus a generated TypeScript SDK section, and composes the other tools by writing a program whose output it curates. Run with: pnpm run demo:code-mode (the REPL is the default UI; acp as the argument serves the acp-agent example's same-shaped overlay instead) — see the Code Mode section for what to try.

cordis-agent

The self-referential demo: the coding spine plus @deepseek-ai/dsh-tool-cordis, whose three tools (cordis_inspect / cordis_mount / cordis_unmount) let the agent inspect the live cordis runtime it runs inside, mount model-written plugins into it (an event listener, a brand-new tool for itself, or a service another mount injects), and dispose them again — all dynamic mounts grouped under one cordis-dynamic fiber subtree. The ctx.fs/ctx.web services ride along provider-only, as the capabilities those plugins build on.

Run with: pnpm run demo:cordis (needs DEEPSEEK_API_KEY). See cordis-agent/README.md for the staged demo script and the toolset RFC for the design and sandbox caveats.

acp-agent

An agent demo exposed as an Agent Client Protocol (ACP) server over JSON-RPC stdio, via the @deepseek-ai/dsh-acp-agent app — drive it from Zed or any other ACP client. Also the home of the keyless snapshot tests.

Run with: pnpm run demo:acp (needs DEEPSEEK_API_KEY); pnpm run demo:code-mode acp boots the same server in Code Mode via the code-mode.cordis.yml overlay. See acp-agent/README.md for the Zed setup and the snapshot-test design.

plan-acp-agent

The ACP server with session modes composed (@deepseek-ai/dsh-mode) — the editor's mode picker switches the session into plan mode, the model works under the read-only allowlist, and it leaves through the user-reviewed exit_plan_mode tool (the review arrives as an elicitation form).

Run with: pnpm run demo:plan-acp (needs DEEPSEEK_API_KEY). See plan-acp-agent/README.md.

sandbox-acp-agent

The coding agent with its bash executor swapped for the sandbox stack (@deepseek-ai/dsh-sandbox-local + @deepseek-ai/dsh-bash-sandbox — the one-entry executor swap the ctx.bash capability seam exists for), served over ACP with @deepseek-ai/dsh-user-approval mounted — the first composition where the approval loop is LIVE: a sandbox denial escalated by the model becomes a session/request_permission prompt in the editor, and "Allow once" runs exactly that command under the wider mode.

Run with: pnpm run demo:sandbox-acp (needs DEEPSEEK_API_KEY; bwrap, a Landlock-enforcing kernel, or macOS for confined runs). See sandbox-acp-agent/README.md.

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