docs: unwrap hard-wrapped Markdown to one line per paragraph

Hard line breaks mid-paragraph make docs harder to edit and diff — a
one-word change reflows and re-diffs the whole paragraph. Reflow all
tracked non-vendor Markdown (plus vendor/AGENTS.md) so each prose
paragraph is a single line; soft-wrapping is the editor's job. Fenced
code, tables, and list structure are preserved (wrapped list items fold
to one line per bullet). Documents the convention in AGENTS.md.

packages/agent/README.md

@@ -1,25 +1,20 @@
 # dsh-agent
 
-Agent interface, registry, and `agent/*` event vocabulary. Every plugin (UI,
-hooks, orchestrators) programs against the `Agent` handle defined here — it has
-zero loop dependency, so the loop is swappable.
+Agent interface, registry, and `agent/*` event vocabulary. Every plugin (UI, hooks, orchestrators) programs against the `Agent` handle defined here — it has zero loop dependency, so the loop is swappable.
 
 ## Service: `AgentRegistry` (ctx key: `agents`)
 
-Tracks live agents so UI, hook, and orchestrator plugins can find them without
-importing the concrete loop package.
+Tracks live agents so UI, hook, and orchestrator plugins can find them without importing the concrete loop package.
 
 ### Public API
 
-- `ctx.agents.register(agent: Agent): () => void`
-  Register a live agent. Disposed with the calling fiber.
+- `ctx.agents.register(agent: Agent): () => void` Register a live agent. Disposed with the calling fiber.
 - `ctx.agents.get(id: string): Agent | undefined`
 - `ctx.agents.list(): Agent[]`
 
 ### Events
 
-The full `agent/*` event taxonomy is declared via declaration merging in
-`dsh-agent` (not `dsh-agent-loop`), so plugins depend only on this package.
+The full `agent/*` event taxonomy is declared via declaration merging in `dsh-agent` (not `dsh-agent-loop`), so plugins depend only on this package.
 
 #### Lifecycle (emit)
 
@@ -34,12 +29,9 @@ The full `agent/*` event taxonomy is declared via declaration merging in
 
 #### Interception seams (waterfall)
 
-- `agent/request` — mutate `GenerateOptions` before the model call (hooks,
-  compaction, model switching, tool filtering)
-- `agent/step-result` — post-process the assembled assistant message before tool
-  dispatch (validates what the log records)
-- `agent/turn-continuation` — override the continue/stop decision
-  (force-continue /loop, force-stop budget guard)
+- `agent/request` — mutate `GenerateOptions` before the model call (hooks, compaction, model switching, tool filtering)
+- `agent/step-result` — post-process the assembled assistant message before tool dispatch (validates what the log records)
+- `agent/turn-continuation` — override the continue/stop decision (force-continue /loop, force-stop budget guard)
 
 #### Streaming + tool (emit)
 
@@ -52,20 +44,15 @@ The full `agent/*` event taxonomy is declared via declaration merging in
 The handle every plugin programs against:
 
 - `agent.send(content, options?)` — queue a message; starts a turn when idle
-- `agent.steer(content, options?)` — steer a running turn (inject between steps);
-  behaves like `send` when idle
-- `agent.inject(content, options?)` — inject in-session context without triggering
-  a turn (context/message event); next request sees it
+- `agent.steer(content, options?)` — steer a running turn (inject between steps); behaves like `send` when idle
+- `agent.inject(content, options?)` — inject in-session context without triggering a turn (context/message event); next request sees it
 - `agent.abort(reason?)` — abort the in-flight step
 - `agent.session`, `agent.status`, `agent.options`, `agent.id`
 
 ### Extension points
 
-- Agent creation: `AgentLoop.create()` is the concrete implementation (in
-  `dsh-agent-loop`). Replace the loop by implementing `Agent` and registering
-  via `ctx.agents.register()`.
-- Event listeners: all `agent/*` events are declared here — no dependency on the
-  loop package needed.
+- Agent creation: `AgentLoop.create()` is the concrete implementation (in `dsh-agent-loop`). Replace the loop by implementing `Agent` and registering via `ctx.agents.register()`.
+- Event listeners: all `agent/*` events are declared here — no dependency on the loop package needed.
 
 ### What is NOT here (TODO)