Hermes can append a text "runtime footer" (model, context %, workdir,
latency, cost) to final replies, but only when display.runtime_footer is
enabled in the hermes config. We want the same info but controlled by the
APP, not the gateway config. So the gateway now ALWAYS sends the data as a
structured `runtime` object on final assistant messages, and the app decides
whether/what to show.
Gateway (gateway-plugin/):
- protocol.py: new runtime_footer() helper + `runtime` field on the
message / message.stop frames. Keys (all optional, absent when the data
is unavailable — e.g. no cost for local models): model (vendor prefix
dropped), context_pct (0-100), cwd (home-relative), latency (seconds),
cost (USD).
- adapter.py: a post_api_request plugin hook captures the turn's model +
prompt tokens + start time (platform-filtered to android so other
platforms don't pollute the buffer). _build_runtime_footer() resolves the
model's context window (cached, best-effort, off the event loop via
asyncio.to_thread with a timeout) and computes context_pct. The runtime
object is attached on every final send (streaming message.stop and
non-streaming message, plus the fallback paths).
- outbox.py: `runtime` preserved in history reconstruction so the footer
survives a restart / first open.
App (app/shared/):
- Protocol.kt: RuntimeMeta data class + `runtime` on MessagePayload /
MessageStopPayload / HistoryMessage.
- ChatStore.kt: `runtime` on MessageItem, wired through live + history
reconciliation.
- SecureStore.kt (+ Android/Desktop actuals): runtimeFooterEnabled +
runtimeFooterFields (persisted per device).
- IrisController.kt: StateFlows + toggleRuntimeFooter() /
toggleRuntimeField(); RUNTIME_FIELD_KEYS / default set / parser.
- SettingsScreen.kt: "Runtime footer" switch; when on, an expandable chip
menu (Model · Context % · Workdir · Latency · Cost) to pick fields.
- ChatScreen.kt: footer rendered on the SAME line as the timestamp (footer
left, time right, Telegram-style), only for final non-streaming assistant
answers; Inspector pane now shows the runtime fields too.
Docs: 04-wire-protocol.md + frames.schema.json document the `runtime`
object.
Verified end-to-end on device: final replies carry
`qwen3.8-27B-exl3-4.5bpw · 53% · ~ · 38s` with the time right-aligned on
the same line; 69/69 gateway tests pass, Kotlin builds + tests pass.
ARIA
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