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ChuckandClaude Opus 5.5
c461f4efdb
The control socket is now the only way the web interface sends the display a command. The display stops reading display_on_demand_request and plugin_error_clear_request, and the web interface stops writing them. - Display: no mailbox poll (MailboxWatch, the 1 s / 0.25 s cadence, _consume_on_demand_request, the deprecation log) and no persisted display_on_demand_processed_id guard; the error publisher reads no clear request. CacheManager.file_signature and MailboxWatch are removed. - A write to either retired key is dropped by CacheManager.save_cache and logged once per writer, naming the plugin from the call stack (or the request's plugin_id), with the API to move to. - Web: on-demand start with no display listening starts the service (when start_service) and sends the request again once the socket answers (45 s, 10 s for a running service without a socket yet); every other failure is a 503 (400 for invalid_args). Stop answers 503 when no display listens, unless stop_service. errors/clear answers 503 with a reason-specific message instead of writing a request; clear_pending is always false. src.ipc.client.should_fall_back is replaced by display_not_listening. - Kept: display_current_state, display_on_demand_state, plugin_runtime_snapshot and the heartbeat (read whenever the socket cannot answer), and display_on_demand_config (the display's resume record). Tests: mailbox-only tests removed (test_on_demand_mailbox.py, the mailbox cadence, file_signature and MailboxWatch tests); tests that injected requests through the mailbox now use the socket queue or a plugin's in-process request. The run-loop harness sends on-demand requests over its fake control socket, so four golden traces change: on-demand starts and stops land at the request instant instead of the next 0.25 s mailbox look (one frame fewer on the screen they end), and in vegas.json within one frame instead of 263 ms, which shifts the later 1 s-throttled WiFi-notice check by under a second. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>