...block
Every comment composer gains a second button: posting the comment also
puts an agent-ready block on the clipboard (snippet title + id + the
comment text), for handing feedback straight to a terminal agent that
is not watching the feedback channel. The comment still lands in the
thread, so an agent can also pick it up later through the normal
delivery path.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Replaces the Send & copy composer button. The server now counts open
author=user feedback waits per session (with a short grace window so
re-armed polls don't flicker) and exposes agentListening on session
rows plus a session-listening feed event. The composer shows a
"listening" indicator when an agent has a wait open — a post is seen
immediately — and posting is a single Post button again. Each rendered
user comment instead carries a copy button that puts the agent-ready
paste block on the clipboard for agents not watching the channel.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The thread under each card (and the session thread) now shows whether
its newest user comment has actually reached the agent: "posted —
agent hasn't picked it up yet" until the delivery cursor passes it,
then a green "received by agent". The cursor (session.agentSeq) is the
proof of delivery — piggyback, waits, and the background watch all
advance it — and the server now broadcasts session-updated when it
moves, so receipts flip live in the viewer.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

The read receipt is now a single checkmark on the latest user comment —
faded grey until the delivery cursor reaches it, green once the agent
has collected it — instead of a text status line. The per-comment copy
button is hover-only on every viewport now (dropped the always-visible
override at narrow/touch widths).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

...ening
Shift the viewer's whole angle from "message the agent" to "leave a
comment": composers read "Leave a comment..." with a "Comment" button,
and the synchronous-delivery affordances are gone — no green delivery
checkmarks and no "●くろまる listening" indicator. A comment is an annotation
the agent picks up through the feedback loop, not a live message.
Removes the server-side listener tracking (agentListening, the
session-listening event, the per-session wait counter and grace timer)
and the cursor-advance broadcasts that drove the receipts. The
per-comment copy button stays, reworded to "comment".
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

A continuous long-poll that re-arms forever and prints each new user
comment as a single line — the foundation for a Claude Code background
monitor. Waits for the first publish when no session exists yet, and
backs off on transient errors instead of exiting.
After the first poll it carries no client cursor: reading with
author=user resumes from the session's server-side agent cursor and
advances it via markAgentSeen, so a comment is delivered exactly once
across watch, wait, and piggyback. Honoring a local cursor would
re-deliver anything a piggybacked write had already consumed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Ship the remaining phases of the Claude Code plugin plan on top of
`sideshow watch`:
- Plugin package in `plugin/`: manifest with userConfig (sideshowUrl,
 apiToken), the sideshow MCP server, and a background monitor that runs
 `sideshow watch` to stream browser comments to the agent as
 notifications. A focused skill teaches the notification workflow.
 Validated with `claude plugin validate`.
- Repo-hosted marketplace at `.claude-plugin/marketplace.json` (plugin
 source `./plugin`). Install: `/plugin marketplace add modem-dev/sideshow`
 then `/plugin install sideshow@sideshow`.
- A "connect Claude Code" integrations modal in the viewer (sidebar
 footer + onboarding) with the install commands, what the monitor runs,
 and honest caveats (two commands not one-click; needs Claude Code
 >= 2.1.105). e2e covers it on chromium + webkit.
- `sideshow watch` now falls back to resolving the most recently active
 session matching cwd (via GET /api/sessions), so the monitor finds the
 right session even when its process tree doesn't share the local state
 file written by the agent's CLI calls.
README + CHANGELOG document the plugin; the plan file records all four
phases done and the remaining release/smoke-test steps.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>