feat(#2093): migrate Kilo onto EoS imperative adapter + hook-bus/model/MCP/dispatch upgrades (ADR-1239)

Fold remaining isKilo logic branches into descriptor-driven reads:
finishPermissionWriter (uninstall cleanup), skipSharedHooksInstall (hooks
copy), and a skills converter-name registry (the artifactLayout.converter
field is now load-bearing, not decorative). frontmatterDialect stays the
documented dispatch key for frontmatter (no descriptor field for it). Dead
isKilo destructure bindings removed. Byte-identical golden parity for all 16
runtimes (opencode, which shares kilo's combined-family path, verified clean).

UPGRADE 1 (hook bus): install .kilo/plugins/gsd-core.js native plugin +
extensionEvents:"kilo" + EXTENSION_EVENT_SURFACES.kilo (OpenCode-fork bus).
UPGRADE 2 (active model): populate runtimeTierDefaults.kilo + thread
modelOverride through convertClaudeToKiloFrontmatter — model no longer stripped
from agents. UPGRADE 3 (MCP): document the gsd-core MCP companion under kilo's
mcp config key. UPGRADE 4 (named dispatch): agents/*.md mode:subagent roster is
the Task-tool dispatch surface (tested); subagentToolkit stays 'undocumented'
per AC so dispatch degrades to 'degraded' by design.

Model-catalog single-source edit ripples the shared model-catalog.json hash
into all 16 golden fixtures (expected). Inline defect fixes (no-defer): stale-
bake-guard resolveAgentDir 'agent'->'agents' (was a silent no-op for opencode/
codex), hardcoded 'Removed OpenCode plugin' uninstall log -> generic, and the
connect-gsd-mcp-server.md OpenCode mcpServers->mcp doc error.

Tests: kilo-imperative-reference (adapter/axes/fail-closed/degradation/
hostBehaviors + widened isKilo source-grep across 4 modules) + kilo-upgrades
(plugin parity+load, model-override converter, agents dispatch surface, MCP
doc). Matrix + how-to + config docs updated; changeset added.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/how-to/connect-gsd-mcp-server.md

@@ -26,14 +26,38 @@ host.
 }
 ```
 
-- **Claude Code / Codex / OpenCode / Cursor / Cline / Hermes** — under the
-  host's `mcpServers` object (project or user config).
+- **Claude Code / Codex / Cursor / Cline / Hermes** — under the host's
+  `mcpServers` object (project or user config).
 - **VS Code** — in the workspace MCP servers list.
 - **Antigravity CLI** — under its `mcpServers` block.
+- **OpenCode** — under the `mcp` key (**not** `mcpServers`), in
+  `~/.config/opencode/opencode.jsonc` (global) or `./opencode.json`
+  (project). The entry shape also differs — see below.
+- **Kilo Code** — an OpenCode fork; also under the `mcp` key (**not**
+  `mcpServers`), in `~/.config/kilo/opencode.jsonc` (global) or
+  `./opencode.json` (project). Same entry shape as OpenCode.
 
 Set `cwd` to the project whose `.planning/` you want GSD to manage — the server
 resolves state paths against it.
 
+### OpenCode / Kilo entry shape
+
+OpenCode (and Kilo, which shares OpenCode's config schema) use a
+`type`/`command`/`timeout` entry under the `mcp` key instead of the generic
+`command`/`args`/`cwd` form above:
+
+```jsonc
+{
+  "mcp": {
+    "gsd": {
+      "type": "local",
+      "command": ["npx", "-y", "@opengsd/gsd-core", "gsd-mcp-server"],
+      "timeout": 10000
+    }
+  }
+}
+```
+
 ## 2. Restart the host
 
 On startup the host performs the MCP `initialize` handshake, lists tools, and