docs: give turn-loop/ a README.md landing page

Part of hyperhive#1898 (b): every docs subdir should have a top-level
README.md link, achieved by moving/renaming where an existing file
already fits the role.

docs/turn-loop.md already served as the hub + index for the three
sub-pages under turn-loop/ (claude-invocation.md, config.md, mcp.md),
so it moves wholesale rather than leaving a redundant top-level
pointer stub. Fixes every inbound/relative link across the repo
(top-level README.md, CLAUDE.md, docs/persistence.md,
docs/tools/scheduling.md, the sub-pages own back-link, hive-agent
README + doc comments, hive-agent/Cargo.toml, .prettierignore per-file
exemption entry) - grepped the whole tree for both turn-loop.md and
turn-loop/ to find every reference rather than trusting a partial
list.

nix fmt clean, cargo check -p hive-agent clean.

.prettierignore

@@ -16,6 +16,6 @@ docs/persistence.md
 docs/terminal-rendering.md
 docs/tools/forge.md
 docs/tools/matrix.md
-docs/turn-loop.md
+docs/turn-loop/README.md
 docs/web-ui/agent.md
 docs/web-ui/dashboard.md

CLAUDE.md

@@ -179,7 +179,7 @@ read them à la carte.
 - **"How does the per-agent terminal classify + colour
   events?"** → [`docs/terminal-rendering.md`](docs/terminal-rendering.md).
 - **"How does claude get its prompt and what tools does it have?"** →
-  [`docs/turn-loop.md`](docs/turn-loop.md) (index: the loop, binary shape,
+  [`docs/turn-loop/`](docs/turn-loop/README.md) (index: the loop, binary shape,
   turn outcomes; sub-pages:
   [`claude-invocation`](docs/turn-loop/claude-invocation.md),
   [`config`](docs/turn-loop/config.md), [`mcp`](docs/turn-loop/mcp.md)).
@@ -239,7 +239,7 @@ The docs below own the details — this section just points at them.
 - **NixOS / nspawn quirks** (bind mounts, conf flags, etc.): →
   [`docs/gotchas.md`](docs/gotchas.md).
 - **Turn loop, sentinels (rate-limit, auth-failed), context
-  window:** → [`docs/turn-loop.md`](docs/turn-loop.md).
+  window:** → [`docs/turn-loop/`](docs/turn-loop/README.md).
 - **Two-step spawn, approval flow, flake.lock validation:** →
   [`docs/approvals.md`](docs/approvals.md).
 - **Pre-push lint hook** (catches tracker-tag and comment-block failures

README.md

@@ -46,7 +46,7 @@ Depth lives in [`docs/`](docs/) — pick the one matching your task:
 | reading path                            | doc                                                                                                                                        |
 | --------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
 | dashboard layout + endpoints            | [`docs/web-ui.md`](docs/web-ui.md) ([shape](docs/web-ui/shape.md) · [dashboard](docs/web-ui/dashboard.md) · [agent](docs/web-ui/agent.md)) |
-| claude turn loop + MCP tools            | [`docs/turn-loop.md`](docs/turn-loop.md)                                                                                                   |
+| claude turn loop + MCP tools            | [`docs/turn-loop/`](docs/turn-loop/README.md)                                                                                              |
 | config-edit + approval state machine    | [`docs/approvals.md`](docs/approvals.md)                                                                                                   |
 | what survives destroy / purge / restart | [`docs/persistence.md`](docs/persistence.md)                                                                                               |
 | naming, wire protocol, commit style     | [`docs/conventions.md`](docs/conventions.md)                                                                                               |

docs/persistence.md

@@ -239,7 +239,7 @@ Survives destroy/recreate, gone on `--purge`.
 Empty marker file. Its presence parks the agent's turn loop: the
 harness keeps serving its web UI and MCP daemons but drives no turns,
 and inbox messages queue unacked until it's removed (see
-[turn loop](turn-loop.md#the-loop)).
+[turn loop](turn-loop/README.md#the-loop)).
 
 Unusually, it's read and written from **both** sides of the harness
 bind-mount, and that's the whole design: the harness stats it

docs/tools/scheduling.md

@@ -89,6 +89,6 @@ lifecycle events, or another container's boot log.
 ## See also
 
 - `remind` (no-approval self-wake path) — documented in
-  [`docs/turn-loop.md`](../turn-loop.md).
+  [`docs/turn-loop/`](../turn-loop/README.md).
 - [`docs/approvals.md`](../approvals.md) — approval flow for
   `request_schedule_prompt`.

docs/turn-loop/README.md

@@ -14,7 +14,7 @@ agents) runs:
    queued and unacked, so a resume drains the backlog instead of
    losing it; reminders and todo wakes buffer in their channels. Set
    it with `hivectl agent <name> pause` or the dashboard toggle; see
-   [persistence](persistence.md#-harnesspaused-per-agent).
+   [persistence](../persistence.md#-harnesspaused-per-agent).
 1. Long-poll `Recv` on its socket. The host-side broker
    (`broker.rs::recv_blocking_batch`) returns immediately if there's
    a pending message, otherwise waits up to 30 s for a broker `Sent`
@@ -31,7 +31,7 @@ agents) runs:
    hard failure. The outcome drives the post-turn action (see
    [Turn outcomes](#turn-outcomes)); compaction is handled inside the
    session (see
-   [Compaction](turn-loop/claude-invocation.md#compaction)). Rate-limit
+   [Compaction](claude-invocation.md#compaction)). Rate-limit
    and auth-failure detection is described [below](#failure-detection-and-login).
 7. Emit `LiveEvent::TurnEnd { ok, note }`. Sleep `poll_ms` to avoid
    tight loops on transient failures.
@@ -94,12 +94,12 @@ loop (`serve_loop` / `handle_turn`) has no per-role branches.
 flake sets it unconditionally for any container-deployed agent;
 see `docs/conventions.md::Hive identity` for the env stack),
 opens turn-stats sqlite, prepares the on-boot files (see
-[claude-invocation](turn-loop/claude-invocation.md#on-boot-files)),
+[claude-invocation](claude-invocation.md#on-boot-files)),
 installs claude plugins, spawns `web_ui::serve` + `vacuum::run`,
 and either drops into `serve_loop` directly (`Online`) or parks on
 the login flow first (`NeedsLogin`). (The forge notification poller
 used to be spawned here too; it is its own process now —
-`hive-forge-notify`, see [`forge.md`](forge.md).)
+`hive-forge-notify`, see [`forge.md`](../forge.md).)
 
 `spawn_todo_socket` opens the todos store and, alongside
 `todo_server::run` (the socket the out-of-process producers dial),
@@ -153,17 +153,17 @@ harness between turns.
 
 ## Sub-pages
 
-The rest lives in three topic pages under [`turn-loop/`](turn-loop/):
+The rest lives alongside this page, in three topic files:
 
-- **[claude-invocation.md](turn-loop/claude-invocation.md)** — how the harness
+- **[claude-invocation.md](claude-invocation.md)** — how the harness
   spawns `claude --print` each turn, the two-pronged compaction (reactive +
   proactive), and the on-boot files it materialises (`--mcp-config`,
   `--system-prompt-file`).
-- **[config.md](turn-loop/config.md)** — the optional per-agent knobs the meta
+- **[config.md](config.md)** — the optional per-agent knobs the meta
   flake wires in (reference docs, icon, passwordless sudo, dashboard links,
   custom static files, connectivity overrides, claude plugins, cargo message
   filtering).
-- **[mcp.md](turn-loop/mcp.md)** — the MCP tool surface claude sees: core tools,
+- **[mcp.md](mcp.md)** — the MCP tool surface claude sees: core tools,
   privileged tool groups, self-wake, authoritative state, the tool envelope,
   and the built-in tool whitelist.
 

docs/turn-loop/claude-invocation.md

@@ -116,7 +116,7 @@ window with two triggers baked into its `run`:
   *still* overflows, `run` surfaces `Error::PromptTooLong`; `drive_turn`
   then archives the session (session lifecycle stays hive-side) and the
   serve loop requeues the message so it redelivers into a fresh session
-  (see [Turn outcomes](../turn-loop.md#turn-outcomes) — the wake prompt itself is tiny, so
+  (see [Turn outcomes](README.md#turn-outcomes) — the wake prompt itself is tiny, so
   the overflow was the accumulated context the archive clears).
 - **Proactive** — a turn finishes cleanly but the last inference's context
   size crossed the policy watermark. While the session is still healthy it

hive-agent/Cargo.toml

@@ -41,4 +41,4 @@ tempfile = "3"
 # The sibling MCP server is its own bin crate now (`hive-agent-mcp`).
 # Privilege boundary is enforced server-side at the socket (tool
 # groups / manager surface).
-# See `docs/turn-loop.md::Harness binary shape`.
+# See `docs/turn-loop/README.md::Harness binary shape`.

hive-agent/README.md

@@ -15,7 +15,7 @@ understand or change: what happens between "a message lands in the
 inbox" and "claude produces a reply", how login/auth is bootstrapped,
 how the per-agent web UI is served, or how turn/event stats get
 recorded. Architecture detail lives in
-[`docs/turn-loop.md`](../docs/turn-loop.md); this README is just the
+[`docs/turn-loop/`](../docs/turn-loop/README.md); this README is just the
 map of the module tree.
 
 ## Shape
@@ -48,4 +48,4 @@ map of the module tree.
 
 Sibling: **`hive-agent-mcp`** (the MCP server this loop points claude
 at every turn). Both are described together in
-[`docs/turn-loop.md::Harness binary shape`](../docs/turn-loop.md).
+[`docs/turn-loop/::Harness binary shape`](../docs/turn-loop/README.md).

hive-agent/src/login.rs

@@ -118,7 +118,7 @@ impl LoginState {
 /// infinite-401 loop a bare-existence check would produce when stale
 /// credentials are already on disk. Mtime-snapshot resumption rationale
 /// and `DirSnapshot` two-axis design: see
-/// [`docs/turn-loop.md::The loop`](../../docs/turn-loop.md).
+/// [`docs/turn-loop/::The loop`](../../docs/turn-loop/README.md).
 ///
 /// # Panics
 ///

hive-agent/src/main.rs

@@ -4,7 +4,7 @@
 //! generic and testable. Sibling: `hive-agent-mcp` (the MCP server this
 //! loop points claude at).
 //! Architecture lives in
-//! [`docs/turn-loop.md::Harness binary shape`](../../../docs/turn-loop.md).
+//! [`docs/turn-loop/::Harness binary shape`](../../../docs/turn-loop/README.md).
 //!
 //! Single bin crate: the module tree below (formerly this crate's `lib.rs`,
 //! before lib + bin were collapsed into one) plus the serve loop.
@@ -510,7 +510,7 @@ fn spawn_todo_socket(
 /// Boot — wires up the web UI, login state, stats, plugins, forge
 /// notifier, and either drops into `serve_loop` directly (`Online`) or
 /// parks on the login flow first (`NeedsLogin`). See
-/// `docs/turn-loop.md::Boot wiring`.
+/// `docs/turn-loop/README.md::Boot wiring`.
 async fn serve_main<S: Surface>(socket: &Path, poll_ms: u64) -> Result<()> {
     let port = std::env::var("HIVE_PORT")
         .ok()