refactor: drop 12 runtimes, keep Claude, Codex, OpenCode, Cursor, ZCode, Antigravity

Removes kilo, kimi, kimi-code, copilot, windsurf, augment, trae, qwen, hermes,
cline, codebuddy and pi end to end: capability descriptors, installer branches
and converters (bin/install.js 14.9k -> 11.2k lines), TypeScript converters,
hook surfaces and runtime homes, review lanes qwen/kimi-code, the two pi
migrations, Kimi payload normalization in the hook guards, dead hostBehaviors
vocabulary, launcher home probes, fixtures, runtime-specific tests and the
prose that presented them as supported.

Installer output for the six kept runtimes is byte-identical to before the
prune. The Kimi tool-vocabulary tests in workflow-guard, read-guard and
read-injection-scanner are left in place pending a decision.

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

@@ -1,7 +1,7 @@
 # How to connect a host to the MSD companion MCP server
 
 This guide shows you how to make a MCP-capable host (Claude Code, Codex,
-OpenCode, VS Code, Antigravity CLI, Cursor, Cline, Hermes, Augment Code) drive
+OpenCode, VS Code, Antigravity CLI, Cursor) drive
 MSD — run MSD
 commands and read/write `.planning/` state — through the companion MCP server,
 with no bespoke plugin.
@@ -31,13 +31,8 @@ host.
 }
 ```
 
-- **Claude Code / Codex / Cursor / Cline / Hermes** — under the host's
+- **Claude Code / Codex / Cursor** — under the host's
   `mcpServers` object (project or user config).
-- **Augment Code** — under the `mcpServers` block of its own
-  `settings.json` (not a standalone MCP config file, unlike Antigravity)
-  — global at `~/.augment/settings.json`, project-local at
-  `.augment/settings.json`. MSD's installer configures this entry
-  automatically (`--augment` installs).
 - **VS Code** — in the workspace MCP servers list.
 - **Antigravity** — under the `mcpServers` block of its standalone
   `mcp_config.json` profile (not embedded in `settings.json`) — global at
@@ -48,16 +43,13 @@ host.
 - **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 MSD to manage — the server
 resolves state paths against it.
 
-### OpenCode / Kilo entry shape
+### OpenCode entry shape
 
-OpenCode (and Kilo, which shares OpenCode's config schema) use a
+OpenCode uses a
 `type`/`command`/`timeout` entry under the `mcp` key instead of the generic
 `command`/`args`/`cwd` form above: