ai-app: a phone interface to Claude Code and llama.cpp sessions
A Rust backend that owns the sessions and an Android app that reads them. The server spawns and adopts CLI processes, normalises everything they emit into one event model, keeps the transcript, and serves it over pinned TLS on a WireGuard interface; the phone streams that, replies, sends images, and imports conversations the machine already has. `AGENTS.md` is the working guide -- what runs where, what has been measured, and the faults that were expensive to find. `PLAN.md` is the design record. History before this point was squashed away. It was a personal project's running commentary and carried a name and a couple of machine paths that have no business in a public repository; the tree is what mattered and the tree is here.
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package com.example.aiapp
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import androidx.compose.foundation.clickable
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import androidx.compose.foundation.layout.Box
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.Row
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import androidx.compose.foundation.layout.Spacer
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import androidx.compose.foundation.layout.fillMaxWidth
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import androidx.compose.foundation.layout.height
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import androidx.compose.foundation.layout.padding
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import androidx.compose.foundation.layout.width
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import androidx.compose.material3.Card
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import androidx.compose.material3.CardDefaults
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import androidx.compose.material3.CircularProgressIndicator
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import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.Text
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import androidx.compose.runtime.Composable
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.unit.dp
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/**
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* Something a session can be asked to do to itself, rather than something to say to it.
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*
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* These are the two this app understands, and understanding them is what lets it show them: a
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* suggestion while one is being typed, a name in the settings screen that sends one, and a bubble
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* that stays up while the session is too busy to run it. Anything else beginning with "/" is passed
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* through to whatever runs the session, because a dialect's own vocabulary is its own and grows
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* without this list -- it just arrives unannounced and unexplained.
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*/
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data class SessionCommand(
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/** With the slash, as it is typed and as it is sent. */
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val name: String,
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/** One line, in the suggestion list: what it does, not how. */
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val summary: String,
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/** What follows the name, named for the reader, or null when nothing does. */
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val argument: String?,
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) {
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/** What to put in the box when this is picked: ready to send, or ready to be finished. */
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fun typed(): String = if (argument == null) name else "$name "
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}
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val SESSION_COMMANDS =
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listOf(
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SessionCommand(
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"/compact",
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"Summarise the conversation so far and carry on from the summary",
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null,
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),
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SessionCommand(
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"/clear",
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"Start fresh: drop the conversation from the session's context, keeping it on screen",
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null,
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),
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SessionCommand("/rename", "Change what this session is called", "name"),
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)
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/**
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* The commands worth offering for what has been typed so far.
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*
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* Only for a line that starts with a slash and has not yet become a whole command with an argument
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* -- once there is something after "/rename ", the reader is writing the name and a list of
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* commands underneath it is in the way.
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*/
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fun suggestedCommands(input: String): List<SessionCommand> {
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if (!input.startsWith("/") || input.contains(' ')) return emptyList()
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return SESSION_COMMANDS.filter { it.name.startsWith(input) }
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}
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/**
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* The commands matching what is being typed, above the box they are being typed into.
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*
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* Above rather than over: a list that covers the transcript hides what the command is about, and
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* the reader is usually looking at the thing they mean to act on.
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*/
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@Composable
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fun CommandSuggestions(
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commands: List<SessionCommand>,
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onPick: (SessionCommand) -> Unit,
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modifier: Modifier = Modifier,
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) {
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if (commands.isEmpty()) return
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Card(modifier.fillMaxWidth().padding(horizontal = 16.dp)) {
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Column(Modifier.padding(vertical = 4.dp)) {
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commands.forEach { command ->
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Row(
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Modifier.fillMaxWidth()
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.clickable { onPick(command) }
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.padding(horizontal = 12.dp, vertical = 8.dp),
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verticalAlignment = Alignment.CenterVertically,
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) {
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Text(
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// The command in the colour commands are, so the suggestion and the
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// bubble it becomes are visibly the same thing.
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if (command.argument == null) command.name
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else "${command.name} <${command.argument}>",
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style = MaterialTheme.typography.titleSmall,
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color = commandColor,
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)
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Spacer(Modifier.width(12.dp))
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Text(
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command.summary,
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style = MaterialTheme.typography.bodySmall,
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color = MaterialTheme.colorScheme.onSurfaceVariant,
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)
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}
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}
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}
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}
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}
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/**
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* A command, where the reader put it: at their end of the conversation.
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*
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* Blue rather than the colour of something they said, because they did not say it to the model --
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* it is an instruction to the session, and the reply to it is the session changing rather than
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* anything appearing here.
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*
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* [waiting] is a command the session is too busy to run yet, which is a state with a spinner and a
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* reason: pressing Compact in the middle of a long turn otherwise does nothing visible for minutes
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* and reads as having been missed.
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*/
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@Composable
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fun CommandBubble(text: String, waiting: Boolean = false) {
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Box(Modifier.fillMaxWidth()) {
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Card(
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colors = CardDefaults.cardColors(containerColor = commandColor),
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modifier = Modifier.align(Alignment.CenterEnd).padding(start = 48.dp),
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) {
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Column(Modifier.padding(12.dp)) {
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// Stated beside the fill rather than inherited: a semantic colour has to carry
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// its own contrast, because the surface under it will not change to rescue it.
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Text(text, color = MaterialTheme.colorScheme.inverseOnSurface)
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if (waiting) {
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Spacer(Modifier.height(6.dp))
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Row(verticalAlignment = Alignment.CenterVertically) {
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CircularProgressIndicator(
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modifier = Modifier.width(12.dp).height(12.dp),
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strokeWidth = 2.dp,
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color = MaterialTheme.colorScheme.inverseOnSurface,
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)
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Spacer(Modifier.width(6.dp))
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Text(
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"waiting for this turn to end",
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style = MaterialTheme.typography.bodySmall,
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color = MaterialTheme.colorScheme.inverseOnSurface,
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)
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}
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}
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}
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}
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}
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}
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