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Tianyi Cui 46e31d8481 feat(tool-todo): add the model-facing todo_write tool

Add @deepseek-ai/dsh-tool-todo (a new packages/todo/ group): a model-facing
todo_write(todos: [{content, status}]) tool with whole-list-replace semantics.
Each call appends the full list as a todo/write event to the calling agent's
session log; the current list is the most recent such event (last-write-wins).
Single-owner — a non-agent caller is rejected. Beyond the schema's
type/required/enum checks, execute rejects empty/duplicate content and more than
one in_progress task, narrowing the loosely-typed args into a real TodoItem[].

Both UIs render off the existing session/event: the stdio UI prints a glyphed
checklist; the ACP bridge maps the list to a `plan` sessionUpdate (todosToPlan
synthesizes the priority ACP requires; status maps 1:1). Wired into the
coding-agent, acp-agent, and snapshot example configs with a system-prompt nudge.

Tests: unit (schema, validation, append/replace, no-agent rejection, presentCall,
HMR-safety, Loader export-shape guard), full-loop integration through the agent
loop, the ACP todosToPlan mapping + stream-update arm, the stdio render arm, and
a session/load replay that re-emits the plan. New-group TS wiring added to
tsconfig.base/json/build. RFC + a doc-inventory sweep (architecture, packages
README, AGENTS layout, cookbook group list, example READMEs) ship with it.

The todo-plan ACP snapshot scenario is recorded separately (needs an API key).

2026-06-29 10:30:52 +08:00

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Cookbook: adding a workspace package

The file-by-file checklist for a new @deepseek-ai/dsh-<name> package. (Verified by the bash and adapter packages; if it drifts, fix it here.)

1. Create the package

packages/<group>/<pkg>/
  package.json     # copy from packages/core/tools, adjust name/description/deps
  tsconfig.json    # extends ../../../tsconfig.base.json, rootDir src,
                   # outDir lib/types, references: ../../../vendor/cosmokit,
                   # ../../../vendor/cordis (+ ../../../vendor/schemastery if
                   # you use Config, + ../../<group>/<dep> for each dsh dep)
  src/index.ts     # service default export or plugin (name/inject/apply/Config)
  tests/<x>.spec.ts
  README.md        # service API, events, extension points, design notes

Choose an existing group when one matches the package's role (core, llm, bash, compact, subagent, todo, session-persistence, ui, util, or support). A new group is allowed, but it is a pure container: no package.json, no source files, and packages still sit exactly one level below it.

package.json invariants (enforced by pnpm run constraints / scripts/check-workspace-constraints.ts): private: true, version: 0.0.1, type: module, main: "lib/index.js", types: "lib/types/index.d.ts", exports["."].types: "./lib/types/index.d.ts", exports["."].default: "./lib/index.js", cordis in BOTH peerDependencies and devDependencies (same range). Mirror every dsh peer dependency in devDependencies. schemastery goes in dependencies (it is a runtime validator), matching agent-loop. The files list is precise: lib/index.js, lib/types/**/*.d.ts, lib/types/**/*.d.ts.map, and src; do not publish lib/types JS or JS-map intermediates or stale root declaration files. CLI app packages with a package bin include lib/bin.js immediately after lib/index.js in files.

In-package relative imports use explicit .ts specifiers in source (for example, export * from './types.ts'). The compiler rewrites those to .js in emitted JS and leaves explicit .ts specifiers in declarations, which standard NodeNext/Node16 TypeScript consumers resolve to the sibling .d.ts files.

2. Register it in the root configs

File	Change
`tsconfig.base.json`	no edit for an existing group; for a new group, add a `./packages/<group>//src` candidate to the `@deepseek-ai/dsh-` wildcard
`tsconfig.json`	add `{ "path": "./packages/<group>/<pkg>" }` to `references`
`tsconfig.build.json`	add `{ "path": "./packages/<group>/<pkg>" }` to `references`
`knip.json`	only if the package has non-`.spec.ts` entries (e.g. `.e2e.ts` → add a per-workspace override like `packages/llm/llm-deepseek`)

Covered automatically by globs or package-manifest discovery — no edits needed: root package.json workspaces, scripts/publint-all.ts, tsdown.config.ts, vitest.config.ts, eslint.config.mjs, scripts/check-workspace-constraints.ts.

3. Decide the package topology

For a swappable capability, split interface / implementation / consumer into separate packages (see docs/architecture.md § "Capability seams" — the bash trio is the template). A single-purpose plugin stays one package.

4. Verify

pnpm install        # registers the workspace
pnpm run constraints && pnpm run typecheck && pnpm run lint
pnpm run test:coverage  # 100% per-file over src (types.ts exempt)
pnpm run build && pnpm run hygiene

Test expectations: every registry/registration needs an HMR-safety test (register from a child fiber, dispose it, assert cleanup). Excessive tests are welcome — see AGENTS.md.

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