Files
deepseek-harness/docs/rfc/implemented/simplification/2026-07-04-fold-stdio-ui-helper.md
imccyu 6f77da4c8c refactor: relocate demo app bundles to packages/examples/*-demo
Move the agent-spine bundle and the stdio/ACP/JSON-RPC app packages out of
core/ and ui/ into a new packages/examples/ group, renamed with a -demo
suffix so the npm name marks them as non-product surface:

  core/agent-core   -> examples/agent-spine-demo  (dsh-agent-spine-demo)
  ui/stdio-agent    -> examples/stdio-demo        (dsh-stdio-demo)
  ui/acp-agent      -> examples/acp-demo          (dsh-acp-demo)
  ui/jsonrpc-agent  -> examples/jsonrpc-demo      (dsh-jsonrpc-demo)

Update every code/config/test reference and reference-only doc mentions, and
regenerate module-graph, config-catalog, and doc-graphs. The jsonrpc bin
(dsh-jsonrpc-agent) and single-file exe (dsh-jsonrpc-agent-pkg) keep their
names; the SDK runtime-startup surface is reconciled separately.
2026-07-15 16:46:05 +08:00

3.3 KiB

RFC: Fold the stdio UI helper into the stdio app

Status: implemented

Problem

The readline UI was a whole package (@deepseek-ai/dsh-ui-stdio under packages/support/) whose only runtime importer was the app package @deepseek-ai/dsh-stdio-demo. The examples reach the readline UI by loading the app, never by composing the helper themselves; every other repo reference was mechanical or descriptive surface that existed BECAUSE the package boundary existed — manifest and tsconfig entries, generated module-graph rows, dependency-graph and README rows, and doc comments naming the package. The ui group README recorded the support placement rationale ("exists chiefly for the examples and the coverage gate — ui/ is reserved for surfaces shipped as product"), which left a standing tension: a shipped product app depending on a support package documented as NOT product surface.

The boundary bought package metadata, workspace and tsconfig references, module-graph rows, README entries, and publint surface for a helper that is not independently swappable: the stdio app's front-door cluster always includes the readline UI, and nothing else can meaningfully consume it.

Decision

The helper lives in @deepseek-ai/dsh-stdio as the terminal-channel plugin (packages/ui/stdio/src/index.ts): createStdioChat, its StdioRuntime test seam, and its unit tests (packages/ui/stdio/tests/stdio.spec.ts, readline.spec.ts) moved with it, so EOF handling, rendering, disposal, and piped-vs-TTY behavior stay unit-covered under the per-file coverage gate without hijacking process globals. The module keeps the named name/inject/Config/apply export shape — the contract the app's ctx.plugin(uiStdio, …) mount consumes — and the keyless Loader-path smokes in examples/echo-agent and examples/coding-agent keep proving the composed tree boots through the real Loader (the stdio package's plugin-shape unit suite pins the explicit unwrapExports assertion, since a bundle without inject would boot past a stray default rather than crash).

The packages/support/ui-stdio package is gone: manifest, tsconfig references, module-graph rows, and README rows deleted; the doc comments that named the package (the example e2e module docs, packages/README.md, the support and todo READMEs, the ui group README) describe the in-package module.

Alternatives considered

Why not promote it to ui/ instead?

Promotion would have resolved the support-vs-product mismatch while keeping the boundary — the right call only if the readline UI were an independently swappable integration or had a second composer, and the consumer census said neither. The structured ACP bridge stays its own package because it is the product protocol surface with its own contract and snapshot tiers; the readline helper is scaffolding for one app's front door. Re-extraction stays cheap pre-release: if a second product app wants the readline UI, split it back out then, with that consumer shaping the package contract.

Consequences

  • The stdio app owns its whole front door; a leaf cordis.yml still loads one app package and nothing changed shape for the demos.
  • A future standalone terminal UI that wants the helper as a package reintroduces it with that second consumer, rather than the repo keeping a boundary for hypothetical reuse.