From a two-reviewer adversarial pass:
- [High] EADDRINUSE fallback clobbered the shared .last-port: onListen wrote the
bound port unconditionally, so a fallback to a random port overwrote the
preferred port another live session still owns — stranding that session's open
tab forever. Now persist only when we bound the preferred port (not on
fallback). The fallback test now asserts .last-port integrity (teeth-verified).
- [Medium] maybeOpenBrowser ran the URL through a shell (exec + JSON.stringify),
which does NOT neutralize $(...) in a url-host. Platform launchers now use
execFile with the URL as an argv element (no shell). The operator-set
BRAINSTORM_OPEN_CMD path stays shell-based (trusted input).
- [Medium] --open was a silent no-op on native Windows (no win32 branch). Added.
- [Medium] helper.js reconnect/status/tombstone had only substring-grep tests.
Added behavioral tests driving the state machine against a mocked browser:
Reconnecting+backoff (500->1000->2000), tombstone after the grace period, and
reload-on-recovery.
- [Low] status pill showed a false 'Connected' before the socket opened; now
starts 'Connecting…' until onopen.
Not changed (flagged): stop-server.sh's PID-ownership check still matches any
'node ... server.cjs' (narrow residual — a recycled PID onto an unrelated node
server.cjs); robust fix needs fragile cross-platform process introspection.
The injected client reconnected on a fixed 1s timer with no feedback: if the
laptop slept or the server restarted, the page showed 'Connected' over a dead
socket and silently queued events. And when the server stopped, the user got a
bare connection-refused with no explanation.
helper.js now:
- reconnects with exponential backoff (500ms, doubling, capped at 30s; reset on
open), with an onerror->close handler, nulls the socket on close, and clears a
pending timer before scheduling another;
- drives the frame status pill Connected/Reconnecting/Disconnected via a
--status-color custom property (frame-template.html);
- after ~15s disconnected, shows a self-styled 'Companion paused' overlay
(tombstone) explaining the companion stopped and will reconnect automatically;
- on recovery from a tombstoned outage (e.g. server restarted on the same port)
reloads to pick up the restarted server's current screen.
The reconnect-backoff is an exported pure function; helper.test.js unit-tests it
(doubling + cap progression) and asserts the status/tombstone/reconnect wiring.
DOM behaviour is verified live.
Refs #856, #1237
Moves lib/brainstorm-server/ → skills/brainstorming/scripts/ so the
brainstorming skill uses relative paths (scripts/start-server.sh) instead
of ${CLAUDE_PLUGIN_ROOT}/lib/brainstorm-server/. This follows the
agentskills.io specification for portable, cross-platform skills.
Updates visual-companion.md references and test paths. All tests pass.
