Expand the documentation with measured figures and operational detail

Every guide catches up with the sixteen-tool registry: apply_patch and web_fetch sections, the delegation guide with the worker kind, bounded compaction replacing the three-message window description, net in the tool-set tables, six bundled skills, and the module map gains tools-net.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

docs/development.md

@@ -16,7 +16,7 @@ faster and the fallback path is exercised without it.
 ```bash
 bun run shiro          # run from source
 bun run typecheck      # tsc --noEmit
-bun test               # 538 tests
+bun test               # 647 tests
 bun run build          # single binary for this platform -> dist/shiro
 bun run release        # all five platforms -> dist/release + SHA256SUMS
 bun run install:local  # build, then copy onto PATH
@@ -95,9 +95,10 @@ Steps 3 and 4 are two hand-maintained lists of tool names, which is a known weak
 added to one and forgotten in the other is a silently ungated write. Deriving both from the
 tool definitions is on [TODO.md](../TODO.md).
 
-Every tool costs roughly 550 characters of schema on every request. Fourteen built-in tools is
-well past where selection accuracy starts to matter, which is why sets exist and why a new tool
+Every tool costs roughly 550 characters of schema on every request. Sixteen built-in tools is
+past where selection accuracy starts to matter, which is why sets exist and why a new tool
 needs to earn its place — see [ROADMAP.md](../ROADMAP.md) for what has been declined and why.
+One set, `net`, is opt-in rather than on: `web_fetch` is the one tool that leaves the machine.
 
 ## Adding a slash command