Yichen Jiang
1cfbafab6a
Moving the agent plane behind presets left two readers on the wrong side of the host/agent line. `dsh-token-meter` was disabled on the host and mounted inside each preset's `compaction` realm, but its three projection units register into the process-wide `sessionProjections` table. A unit registered from one preset answers for every session, so whether a `minimal` session showed a context meter depended on whether some other session had mounted `standard` since boot, and a process that only ever ran `minimal` showed none. The meter takes no configuration, keys every fold by Session, and registers no tool or prompt section, so it returns to the host composition and leaves the presets' `isolate` map; the realm and `compact-basic` stay, because what a preset chooses is whether its agent compacts, not whether its tokens are counted. Nothing named an agent that joined no preset. The join is a scope-parent link, and without it the tools, prompt-section, and skill views resolve the empty global layer: the agent publishes, the turn runs, and the model receives nothing. `AgentPresets` now logs one warning per such agent while a roster is configured, and the invariant companion fails outright — at `system-prompt/assemble` rather than at publication, because an unjoined agent is legal until it addresses a model and `recompose` binds exactly such an agent. The warning stays advisory: a synchronous `agent/created` throw vetoes publication, and the ACP bridge, SDK server, and headless bundle all create an unjoined agent today. Three limits are recorded rather than fixed: projection key presence is not a per-session capability signal, a superseded standing generation is never reclaimed, and a `cordis_mount` temporary plugin belongs to the composition rather than the session that mounted it. Fixes #2203
Examples
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Runnable demonstrations of the main DeepSeek Harness interfaces and extension points. Each child directory owns its configuration, prerequisites, commands, and detailed behavior.
mcp-memory
Optional overlays that connect supported third-party memory servers through the generic MCP client. See the memory example reference.
headless-agent
A non-interactive agent that accepts one task, runs it, and emits a selected machine-readable or human-readable output format. See the headless example reference.
jsonrpc-agent
An unattended coding agent driven through the Python SDK and JSON-RPC. See the JSON-RPC example reference.
web-cordis
A self-referential agent that can inspect and change its in-memory Cordis plugin tree. See the web-cordis example reference.
acp-agent
An Agent Client Protocol automation server for programmatic clients, with session, permission, and cancellation support. See the ACP example reference.