Implements the turndown Agent Note from the NIH dependency audit (full variant, not the minimal entities-only fallback): dsh-tool-web's fetch rendering now converts HTML through turndown + @joplin/turndown-plugin-gfm (atx headings, fenced code, dash bullets, GFM tables/strikethrough) over the real domino DOM, with script/style/noscript removed wholesale. The hand-rolled ~86-line regex converter html.ts and its entity tables are deleted; renderBody wraps the conversion in try/catch falling back to the raw HTML body, because turndown's recursive DOM walk overflows with a RangeError on pathological nesting (measured: 4k levels on the main thread, 8k in a worker) where the regex version could never throw. Closure weight, measured: tool-web IS in the single-exe runtime closure, and the exe asset globs would pack ~7.9 MB of the three new packages — but ~6 MB of that is domino's test corpus, with runtime lib/ at ~550 KB against a ~174 MB artifact (<0.5% either way), so the swap wins. Per testing policy the previously-missing keyless web_fetch snapshot ships in the same change: the acp-agent `web-fetch` scenario boots a new web.cordis.yml overlay (web seam + real dsh-web-fetch-local provider + tool-web fetch-only + a loopback HTTP fixture server on a fixed port serving deterministic HTML with entities, a GFM table, and nesting), so recording and keyless replay both drive the real HTTP fetch and real conversion end to end; the scenario pins the new `web` header class. The Agent Note moves proposed -> implemented and is rewritten per the lifecycle contract (Decision/Consequences/Testing, closure verdict and alternatives recorded); tool-web and acp-agent READMEs updated in both languages and pairs re-recorded.
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acp-agent example
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Automation-oriented Agent Client Protocol server over JSON-RPC stdio. It is intended for parent agents, subagent providers, and other programmatic clients, not as the product UI.
pnpm run demo:acp # needs DEEPSEEK_API_KEY (repo-root .env or env)
pnpm run demo:code-mode acp # same protocol with the Code Mode tool transport
The leaf loads the ACP app, DeepSeek adapter, sandboxed bash and filesystem stacks, one-shot approval policy, compaction, subagents, workflows, hooks, a derived session-query index, and repeat guard. The app creates one fresh agent per session/new, persists sessions to JSONL, and keeps stdout protocol-pure. session-query.cordis.yml explicitly opts into the workspace-authorized query tools and generic timeout/spill policies for their dedicated snapshot; fs.cordis.yml adds spill storage for filesystem scenarios, code-mode.cordis.yml adds run_code and its generated TypeScript SDK, and web.cordis.yml adds the web seam, the local fetch provider, web_fetch, and a loopback HTML fixture server for the web-fetch snapshot.
Protocol channel
Stdout carries only newline-delimited ACP JSON-RPC. @deepseek-ai/dsh-acp-demo installs no stdout logger; leaf additions must use stderr for diagnostics.
The automation contract — supported methods, baseline prompt content, committed-text output, and the intentionally absent UI surfaces — lives in @deepseek-ai/dsh-acp.
Session workspaces and permissions
Each session/new supplies an absolute cwd. Sandboxed bash and filesystem mutations resolve workspace-write against that session cwd, so concurrent sessions can use separate project roots; platform temporary roots remain shared writable scratch space (sandbox contract). DSH_PERMISSION_MODE selects workspace-write or danger-full-access for deployment and tests.
Under workspace-write, a model retry requesting wider sandbox access triggers session/request_permission with allow_once and reject_once. The client decides programmatically; dismissal or an unavailable answer fails closed. The selected outcome applies only to that retry and is recorded through the normal tool-result/audit path. The server never exposes a permission picker or persists client policy.
Snapshot tests
This example owns the ACP snapshot suite. It boots the real automation server, replays committed model streams through dsh-llm-replay, and compares both normalized protocol output and re-persisted session logs. Recording uses the real model; refresh reuses committed replay input. Overrides cover throw/hang behavior, and optional workspace/ fixtures seed world-state checks.
Most scenarios pin backend behavior rather than ACP-specific behavior; the automation-only ACP decision owns why that coverage remains transport-coupled.