ui: lead the launcher with the prompt and one configuration line

CLAUDE.md

@@ -0,0 +1,19 @@
+# Ellipsis CLI
+
+## Tests are unit tests only
+
+Every test in `test/` covers pure functions: input in, value out. Do not add a
+test that renders the Ink UI. No fake TTY, no terminal emulator, no snapshot of
+a painted screen, no `render()` from ink.
+
+The UI is verified by running it, not by asserting on frames. When a rendering
+claim needs coverage, pull the logic out of the component into a pure function
+in `src/lib/` or `src/ui/*Rows.ts` and test that instead.
+
+`test/screenshot.ts`, `test/screenshot.test.ts`, `test/connect-render.test.ts`,
+and `test/scrollback.test.ts` were deleted for this reason. Do not bring them
+back.
+
+## Conventions
+
+Command naming and `--help` text: see `skills/cli-conventions/SKILL.md`.

package.json

@@ -37,7 +37,6 @@
     "@types/node": "^22.5.0",
     "@types/react": "^19.2.0",
     "@types/ws": "^8.5.12",
-    "@xterm/headless": "^6.0.0",
     "react-devtools-core": "^6.1.2",
     "tsup": "^8.3.0",
     "tsx": "^4.19.0",

src/lib/sessions.ts

@@ -111,32 +111,14 @@ export function shortAge(iso: string, now: Date = new Date()): string {
   return `${Math.floor(hours / 24)}d ago`
 }
 
-// A token count in the tightest readable form: 840 -> "840", 84_200 -> "84.2k",
-// 512_000 -> "512k", 1_240_000 -> "1.24M". One decimal only while it buys
-// precision, so the column stays narrow.
-export function compactTokens(n: number): string {
-  if (!isFinite(n) || n < 0) return '0'
-  if (n < 1000) return String(Math.round(n))
-  if (n < 1_000_000) {
-    const k = n / 1000
-    return k < 100 ? `${trimZero(k.toFixed(1))}k` : `${Math.round(k)}k`
-  }
-  return `${trimZero((n / 1_000_000).toFixed(2))}M`
-}
-
-function trimZero(s: string): string {
-  return s.replace(/\.0+$/, '').replace(/(\.\d*[1-9])0+$/, '$1')
-}
-
-// The nav row's right-hand metadata: how much work the agent did (tokens,
-// spend) and when it last moved. Spend is the server's millicent total, the
-// same total the chat footer shows. A just-started session drops the empty
-// bits rather than showing "0 · $0.00". No source tag: the nav lists cloud
-// sessions only, so it would read the same on every row.
+// The nav row's right-hand metadata: what the session cost and when it last
+// moved. Spend is the server's millicent total, the same total the chat footer
+// shows. No token count: it is a number you cannot act on from the launcher.
+// A just-started session drops the empty spend rather than showing "$0.00". No
+// source tag either: the nav lists cloud sessions only, so it would read the
+// same on every row.
 export function rowMeta(session: AgentSession, now: Date = new Date()): string {
   const bits: string[] = []
-  const tokens = session.tokens?.total ?? 0
-  if (tokens > 0) bits.push(compactTokens(tokens))
   const millicents = session.cost?.total ?? 0
   if (millicents > 0) bits.push(`$${(millicents / 100_000).toFixed(2)}`)
   bits.push(shortAge(lastEventAt(session), now))
@@ -433,6 +415,65 @@ export interface ComposerChoices {
   repos: string[] | null
 }
 
+// What the launcher's one-line configuration summary says the next run will
+// use: the model, how many repositories it checks out, and the parts of the
+// resolved config a picker can't reach (a custom Dockerfile, environment
+// variables). The selected saved config supplies the baseline; the launcher's
+// own Model and Repository picks override it, since those are what actually
+// ship in the request.
+//
+// Counts, not names, for the plural bits: three variable names would crowd out
+// the model on an 80-column row, and the count is what tells you whether to go
+// look.
+export function configSummary(input: {
+  model: string | null
+  // The explicit checkout set, or null when the row is untouched and the
+  // server resolves it (in which case the detected repo is what it picks up).
+  repos: readonly string[] | null
+  detectedRepo: string | null
+  // The chosen saved config's parsed YAML, when one is chosen.
+  agentConfig: Record<string, unknown> | null
+}): string {
+  const bits: string[] = []
+  const env = readObject(input.agentConfig?.environment)
+  const model =
+    input.model ?? readString(readObject(input.agentConfig?.claude)?.model) ?? null
+  if (model) bits.push(model)
+
+  const configRepos = readArray(env?.repositories)?.length ?? null
+  const repoCount =
+    input.repos !== null
+      ? input.repos.length
+      : (configRepos ?? (input.detectedRepo ? 1 : null))
+  if (repoCount !== null) {
+    bits.push(repoCount === 1 ? '1 repository' : `${repoCount} repositories`)
+  }
+
+  const image = readObject(env?.image)
+  if (readString(image?.dockerfile_append)) bits.push('custom Dockerfile')
+
+  const variables = readArray(env?.variables)?.length ?? 0
+  if (variables > 0) {
+    bits.push(variables === 1 ? '1 environment variable' : `${variables} environment variables`)
+  }
+
+  return bits.length > 0 ? bits.join(', ') : 'default configuration'
+}
+
+function readObject(value: unknown): Record<string, unknown> | null {
+  return value && typeof value === 'object' && !Array.isArray(value)
+    ? (value as Record<string, unknown>)
+    : null
+}
+
+function readArray(value: unknown): unknown[] | null {
+  return Array.isArray(value) ? value : null
+}
+
+function readString(value: unknown): string | null {
+  return typeof value === 'string' && value.trim() ? value : null
+}
+
 // The entry point's base request with the composer's picks layered on: a saved
 // config as the source, the model + repositories as a per-run config override
 // (the dashboard composer's shape).