feat(tui): Telemetry screen ÔÇö ASCII sparklines, provider stats, rate-limit heatmap, cost tracker by jaeko44 · Pull Request #441 · virtengine/bosun

jaeko44 · 2026-03-25T19:25:19Z

Task-ID: 3cc669ae-c7e8-4ceb-982f-37ab5be16659\n\nAutomated PR for task 3cc669ae-c7e8-4ceb-982f-37ab5be16659

github-actions · 2026-03-25T19:25:29Z

Bosun CI signal: Bosun-created PR currently has failing checks.

Automation scope: Bosun-created
Workflow: CI
Conclusion: failure
Run: https://github.com/virtengine/bosun/actions/runs/23598625061
Head SHA: d3da3b2
Failed jobs: Build + Tests

Copilot

Pull request overview

Adds a new Telemetry screen to both Ink-based TUIs (the ui/tui app and the tui/ CLI app), including sparklines, provider/token/cost aggregation, a 429 “heatmap”, and funnel stats, plus default telemetry cost config and tests.

Changes:

Introduce telemetry aggregation/rendering helpers and a richer Telemetry UI for ui/tui.
Add a new telemetry screen to the CLI TUI (tui/) with its own model/helpers.
Add default config for telemetry token-cost rates and new vitest coverage for both implementations.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
ui/tui/telemetry-helpers.js	New helper module for sparklines + snapshot aggregation (providers/funnel/429 events/cost).
ui/tui/TelemetryScreen.js	New telemetry UI panel layout (throughput, provider table, 429 heatmap, funnel, cost estimates).
ui/tui/App.js	Wire the telemetry tab to the new `TelemetryScreen` component.
tui/screens/telemetry.mjs	New CLI TUI telemetry screen rendering using a derived model.
tui/screens/telemetry-screen-helpers.mjs	New CLI TUI telemetry model helpers (rates, provider rows, heatmap, funnel, sparklines).
tui/lib/navigation.mjs	Add telemetry to navigation order/input mapping.
tui/app.mjs	Register telemetry screen + add “Telemetry” tab to CLI TUI.
tests/tui-telemetry-ui.test.mjs	New tests for `ui/tui` telemetry helper behaviors.
tests/tui-telemetry-screen.test.mjs	New tests for CLI TUI telemetry model + navigation update.
config/config.mjs	Add `config.telemetry.costPer1kTokensUsd` defaults.

Comments suppressed due to low confidence (1)

ui/tui/App.js:299

There are extra trailing blank lines at the end of the file. Please remove them to keep diffs clean.

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Copilot · 2026-03-25T19:29:44Z

ui/tui/TelemetryScreen.js

+    "yellow",
+    "red",
+  );
+  const dailyCostUsd = history.reduce((sum, item) => sum + item.sessionCostUsd, 0);


dailyCostUsd is computed by summing sessionCostUsd across the snapshot history, which will over-count the same sessions on every refresh (and the history window is rolling, not a day). This makes the displayed "Day Cost" misleading/incorrect. Derive a day/cumulative cost from backend-provided day totals, or change this to a windowed metric (e.g., compute deltas between consecutive snapshots) and rename the label accordingly.

Suggested change

const dailyCostUsd = history.reduce((sum, item) => sum + item.sessionCostUsd, 0);

const dailyCostUsd = Math.max(

0,

(latest.sessionCostUsd || 0) - (history[0]?.sessionCostUsd || 0),

);

Copilot · 2026-03-25T19:29:45Z

tui/app.mjs

  const navItems = [
    { key: "status", num: "1", label: "Status" },
    { key: "tasks", num: "2", label: "Tasks" },
-    { key: "agents", num: "3", label: "Agents" },
+    { key: "agents", num: "3", label: "Agents" },`r`n    { key: "telemetry", num: "4", label: "Telemetry" },
  ];


The navItems array has stray `r`n characters between entries, which will cause a syntax error at runtime. Remove the stray characters and add the telemetry tab item as its own element in the array.

Copilot · 2026-03-25T19:29:45Z

tui/screens/telemetry-screen-helpers.mjs

+  const base = Math.max(1, counts.todo);
+  return {
+    stages: FUNNEL_ORDER.map((stage) => ({
+      ...stage,
+      count: counts[stage.key],
+      conversionPct: Math.round((counts[stage.key] / base) * 100),
+    })),


buildTaskFunnel forces base to at least 1. If todo is 0 but later stages are non-zero (e.g., due to partial telemetry), conversionPct can become >100%, which is misleading. Consider using base = counts.todo and returning 0% when base is 0, or base the conversion on total task count when todo is 0.

Copilot · 2026-03-25T19:29:45Z

tui/lib/navigation.mjs

  ["1", "status"],
  ["2", "tasks"],
-  ["3", "agents"],
+  ["3", "agents"],`r`n  ["4", "telemetry"],


The array literal contains stray characters `r`n (looks like an accidental CRLF escape) inside the Map initializer, which makes this module invalid JS and will break navigation + tests. Remove the stray characters and put the ["4", "telemetry"] entry on its own line like the other entries.

Suggested change

["3", "agents"],`r`n ["4", "telemetry"],

["3", "agents"],

["4", "telemetry"],

Copilot · 2026-03-25T19:29:45Z

tui/app.mjs

 import AgentsScreen from "./screens/agents.mjs";
-import StatusScreen from "./screens/status.mjs";
+import StatusScreen from "./screens/status.mjs";`r`nimport TelemetryScreen from "./screens/telemetry.mjs";
 import { readTuiHeaderConfig } from "./lib/header-config.mjs";


This import line includes stray `r`n characters, which makes the file fail to parse. Remove the stray characters and keep the TelemetryScreen import as a normal separate import statement.

Copilot · 2026-03-25T19:29:45Z

tui/app.mjs

 const SCREENS = {
  status: StatusScreen,
  tasks: TasksScreen,
-  agents: AgentsScreen,
+  agents: AgentsScreen,`r`n  telemetry: TelemetryScreen,
 };


The SCREENS object literal contains stray `r`n characters before the telemetry entry, which makes the object literal invalid JS. Remove the stray characters and add the telemetry screen as a normal key in the object.

Copilot · 2026-03-25T19:29:46Z

config/config.mjs

+    telemetry: Object.freeze({
+      costPer1kTokensUsd: Object.freeze({
+        claude: Number.isFinite(Number(configData.telemetry?.costPer1kTokensUsd?.claude)) ? Number(configData.telemetry.costPer1kTokensUsd.claude) : 0.003,
+        codex: Number.isFinite(Number(configData.telemetry?.costPer1kTokensUsd?.codex)) ? Number(configData.telemetry.costPer1kTokensUsd.codex) : 0.002,
+        gemini: Number.isFinite(Number(configData.telemetry?.costPer1kTokensUsd?.gemini)) ? Number(configData.telemetry.costPer1kTokensUsd.gemini) : 0.0001,


triggerSystem is no longer included in the returned config object (it was replaced by the new telemetry block). triggerSystem is referenced in infra/server code and config-validation tests, so omitting it will break consumers. Add triggerSystem back to the exported config (alongside telemetry, not instead of it).

Copilot · 2026-03-25T19:29:46Z

ui/tui/TelemetryScreen.js

+
+function trimHistory(history, length = HISTORY_SECONDS) {


HISTORY_SECONDS is used as a sample count in trimHistory, but snapshots are collected every 5s. With the current constants, keeping 60 entries actually retains ~5 minutes of history, not 60 seconds. Consider renaming this to HISTORY_SAMPLES or computing the max samples from HISTORY_SECONDS and REFRESH_MS (e.g., ceil(HISTORY_SECONDS*1000/REFRESH_MS)).

Suggested change

function trimHistory(history, length = HISTORY_SECONDS) {

const MAX_HISTORY_SAMPLES = Math.ceil((HISTORY_SECONDS * 1000) / REFRESH_MS);

function trimHistory(history, length = MAX_HISTORY_SAMPLES) {

…cii-sparklines-provi

github-actions · 2026-03-26T11:57:03Z

Bosun PR classification: Bosun-created.
This PR is tracked by Bosun attachment automation.

PR class label: bosun-pr-bosun-created
Attach label: bosun-attached (yes, because Bosun-created PRs remain attached regardless of human PR attach mode)
Attach mode policy: all
Trusted author: no
Bosun-created label present: yes
Automation scope: Eligible for Bosun repair and merge automation (Bosun-created PR).
CI failure signal label: bosun-needs-fix
CI failure marker:
Trigger: pull_request_target / synchronize

config/config.mjs

+    }),
    triggerSystem,
-    workflowWorktreeRecoveryCooldownMin,
+    workflows,


Co-authored-by: bosun-ve[bot] <262908237+bosun-ve[bot]@users.noreply.github.com>

…t-tui-telemetry-screen-ascii-sparklines-provi Co-authored-by: bosun-ve[bot] <262908237+bosun-ve[bot]@users.noreply.github.com>

chore: auto-commit agent work (3cc669ae-c7e)

fe62d1a

jaeko44 added the bosun-attached Bosun PR attachment marker label Mar 25, 2026

Copilot AI review requested due to automatic review settings March 25, 2026 19:25

Copilot started reviewing on behalf of jaeko44 March 25, 2026 19:25 View session

github-actions bot added the bosun-needs-fix Attached PR with failing CI that Bosun should pick up for repair label Mar 25, 2026

Copilot AI reviewed Mar 25, 2026

View reviewed changes

jaeko44 added the bosun-pr-bosun-created PR created by Bosun and eligible for Bosun automation label Mar 26, 2026

Merge origin/main into task/3cc669aec7e8-feat-tui-telemetry-screen-as…

1be7276

…cii-sparklines-provi

github-code-quality bot found potential problems Mar 26, 2026

View reviewed changes

config/config.mjs

}),

triggerSystem,

workflowWorktreeRecoveryCooldownMin,

workflows,

jaeko44 added 3 commits March 26, 2026 22:59

Merge remote-tracking branch 'origin/main' into HEAD

70550d4

Co-authored-by: bosun-ve[bot] <262908237+bosun-ve[bot]@users.noreply.github.com>

Merge remote-tracking branch 'origin/main' into HEAD

210207e

Co-authored-by: bosun-ve[bot] <262908237+bosun-ve[bot]@users.noreply.github.com>

Merge remote-tracking branch 'origin/main' into task/3cc669aec7e8-fea…

d3da3b2

…t-tui-telemetry-screen-ascii-sparklines-provi Co-authored-by: bosun-ve[bot] <262908237+bosun-ve[bot]@users.noreply.github.com>

jaeko44 added bosun-needs-fix Attached PR with failing CI that Bosun should pick up for repair and removed bosun-needs-fix Attached PR with failing CI that Bosun should pick up for repair labels Mar 26, 2026

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feat(tui): Telemetry screen ÔÇö ASCII sparklines, provider stats, rate-limit heatmap, cost tracker#441

feat(tui): Telemetry screen ÔÇö ASCII sparklines, provider stats, rate-limit heatmap, cost tracker#441
jaeko44 wants to merge 5 commits intomainfrom
task/3cc669aec7e8-feat-tui-telemetry-screen-ascii-sparklines-provi

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-  const dailyCostUsd = history.reduce((sum, item) => sum + item.sessionCostUsd, 0);
+  const dailyCostUsd = Math.max(
+,
+    (latest.sessionCostUsd || 0) - (history[0]?.sessionCostUsd || 0),
+  );

	["3", "agents"],`r`n ["4", "telemetry"],
	["3", "agents"],
	["4", "telemetry"],

-function trimHistory(history, length = HISTORY_SECONDS) {
+const MAX_HISTORY_SAMPLES = Math.ceil((HISTORY_SECONDS * 1000) / REFRESH_MS);
+function trimHistory(history, length = MAX_HISTORY_SAMPLES) {

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