dave
930 lines
35 KiB
Rust
930 lines
35 KiB
Rust
//! Headless build-agent mode for distributed, rendezvous-based story processing.
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/// Headless build agent mode.
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///
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/// When invoked via `huskies agent --rendezvous ws://host:3001/crdt-sync`, this
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/// module runs a headless loop that:
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///
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/// 1. Syncs CRDT state with the rendezvous peer.
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/// 2. Writes a heartbeat to the CRDT `nodes` list.
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/// 3. Scans for unclaimed stories in `2_current` and claims them via CRDT.
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/// 4. Spawns Claude Code locally for each claimed story.
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/// 5. Pushes the feature branch to the git remote when done.
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/// 6. Reports completion by advancing the story stage via CRDT.
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/// 7. Handles offline/reconnect: CRDT merges on reconnect, interrupted work
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/// is reclaimed after a timeout.
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///
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/// A minimal HTTP server is started on the agent's port to serve the
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/// `/crdt-sync` WebSocket endpoint, enabling other agents to connect for
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/// peer mesh discovery.
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use std::collections::HashMap;
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use std::path::{Path, PathBuf};
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use std::sync::Arc;
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use tokio::sync::broadcast;
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use poem::EndpointExt as _;
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use crate::agents::AgentPool;
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use crate::config::ProjectConfig;
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use crate::crdt_state;
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use crate::io::watcher;
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use crate::mesh;
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use crate::slog;
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/// Default claim TTL in seconds. If a claim has not been refreshed within this
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/// window, other nodes may displace the stale holder and claim the story.
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/// A node actively working on a story should refresh its claim periodically.
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pub(crate) const CLAIM_TIMEOUT_SECS: f64 = 1800.0; // 30 minutes
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// ── Hash-based tie-break ──────────────────────────────────────────────────
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/// Compute the claim-priority hash for a `(node_id, story_id)` pair.
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///
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/// Uses SHA-256(`node_id` bytes ++ `story_id` bytes), truncated to the first
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/// 8 bytes interpreted as a big-endian `u64`. This function is:
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///
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/// * **Deterministic** — same inputs always produce the same output.
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/// * **Stable across restarts** — depends only on the node's persistent id
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/// and the story id, not on wall-clock time or random state.
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/// * **Cross-implementation portable** — SHA-256 is a standard primitive; any
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/// conforming implementation will produce identical values.
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fn claim_hash(node_id: &str, story_id: &str) -> u64 {
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use sha2::{Digest, Sha256};
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let mut hasher = Sha256::new();
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hasher.update(node_id.as_bytes());
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hasher.update(story_id.as_bytes());
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let digest = hasher.finalize();
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u64::from_be_bytes(digest[..8].try_into().expect("sha256 is 32 bytes"))
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}
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/// Decide whether this node should be the one to claim `story_id`.
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///
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/// Returns `true` iff `claim_hash(self_node_id, story_id)` is **strictly
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/// lower** than the hash of every alive peer. When there are no alive peers
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/// (single-node cluster) the result is always `true`.
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///
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/// # Trade-off note
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/// Because the winning node is determined purely by the hash of its id and the
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/// story id, the distribution is uniform per story but a given node may
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/// consistently "win" or "lose" across a set of stories depending on how its
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/// id happens to hash. For 2–5 node clusters this imbalance is negligible in
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/// practice: any node is the lowest-hash winner with probability ≈ 1/N for a
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/// random story id, so the long-run distribution is approximately fair. For
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/// clusters with many nodes (e.g. >10) the expected variance is larger and
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/// operators may want a different work-distribution strategy.
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pub fn should_self_claim(
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self_node_id: &str,
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story_id: &str,
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alive_peer_node_ids: &[String],
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) -> bool {
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let my_hash = claim_hash(self_node_id, story_id);
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for peer_id in alive_peer_node_ids {
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// Skip self if it appears in the peer list.
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if peer_id == self_node_id {
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continue;
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}
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if claim_hash(peer_id, story_id) <= my_hash {
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return false;
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}
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}
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true
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}
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/// Interval between heartbeat writes and work scans.
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pub const SCAN_INTERVAL_SECS: u64 = 15;
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/// Run the headless build agent loop.
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///
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/// This function never returns under normal operation — it runs until the
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/// process is terminated (SIGINT/SIGTERM).
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///
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/// If `join_token` and `gateway_url` are both provided the agent will register
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/// itself with the gateway on startup using the one-time token.
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pub async fn run(
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project_root: Option<PathBuf>,
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rendezvous_url: String,
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port: u16,
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join_token: Option<String>,
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gateway_url: Option<String>,
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) -> Result<(), std::io::Error> {
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let project_root = match project_root {
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Some(r) => r,
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None => {
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eprintln!("error: agent mode requires a project root (no .huskies/ found)");
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std::process::exit(1);
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}
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};
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println!("\x1b[96;1m[agent-mode]\x1b[0m Starting headless build agent");
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println!("\x1b[96;1m[agent-mode]\x1b[0m Rendezvous: {rendezvous_url}");
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println!(
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"\x1b[96;1m[agent-mode]\x1b[0m Project: {}",
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project_root.display()
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);
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// Validate project config.
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let config = ProjectConfig::load(&project_root).unwrap_or_else(|e| {
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eprintln!("error: invalid project config: {e}");
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std::process::exit(1);
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});
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slog!(
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"[agent-mode] Loaded config with {} agents",
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config.agent.len()
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);
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// Event bus for pipeline lifecycle events.
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let (watcher_tx, _) = broadcast::channel::<watcher::WatcherEvent>(1024);
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let agents = Arc::new(AgentPool::new(port, watcher_tx.clone()));
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// Start filesystem watcher for config hot-reload.
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watcher::start_watcher(project_root.clone(), watcher_tx.clone());
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// Bridge CRDT events to watcher channel (same as main server).
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{
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let crdt_watcher_tx = watcher_tx.clone();
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let crdt_prune_root = Some(project_root.clone());
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if let Some(mut crdt_rx) = crdt_state::subscribe() {
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tokio::spawn(async move {
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while let Ok(evt) = crdt_rx.recv().await {
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if crate::pipeline_state::Stage::from_dir(&evt.to_stage)
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.is_some_and(|s| matches!(s, crate::pipeline_state::Stage::Archived { .. }))
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&& let Some(root) = crdt_prune_root.as_ref().cloned()
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{
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let story_id = evt.story_id.clone();
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tokio::task::spawn_blocking(move || {
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if let Err(e) = crate::worktree::prune_worktree_sync(&root, &story_id) {
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slog!("[agent-mode] worktree prune failed for {story_id}: {e}");
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}
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});
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}
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let (action, commit_msg) =
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watcher::stage_metadata(&evt.to_stage, &evt.story_id)
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.unwrap_or(("update", format!("huskies: update {}", evt.story_id)));
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let watcher_evt = watcher::WatcherEvent::WorkItem {
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stage: evt.to_stage,
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item_id: evt.story_id,
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action: action.to_string(),
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commit_msg,
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from_stage: evt.from_stage,
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};
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let _ = crdt_watcher_tx.send(watcher_evt);
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}
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});
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}
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}
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// Subscribe to watcher events to trigger auto-assign on stage transitions.
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{
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let auto_rx = watcher_tx.subscribe();
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let auto_agents = Arc::clone(&agents);
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let auto_root = project_root.clone();
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tokio::spawn(async move {
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let mut rx = auto_rx;
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while let Ok(event) = rx.recv().await {
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if let watcher::WatcherEvent::WorkItem { ref stage, .. } = event
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&& crate::pipeline_state::Stage::from_dir(stage.as_str())
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.is_some_and(|s| s.is_active())
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{
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slog!("[agent-mode] CRDT transition in {stage}/; triggering auto-assign.");
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auto_agents.auto_assign_available_work(&auto_root).await;
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}
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}
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});
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}
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// ── Start minimal HTTP server for /crdt-sync endpoint ─────────────
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//
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// Other agents discover this endpoint via the CRDT `nodes` list and
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// open supplementary mesh connections for resilience.
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{
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let sync_handler = poem::get(crate::crdt_sync::crdt_sync_handler);
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// Build a minimal AppContext for the crdt_sync_handler (the handler
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// receives it via Data<> but doesn't use it — the underscore prefix
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// on `_ctx` confirms this).
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let agent_ctx = build_agent_app_context(&project_root, port, watcher_tx.clone());
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let agent_ctx_arc = Arc::new(agent_ctx);
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let app = poem::Route::new()
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.at("/crdt-sync", sync_handler)
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.data(agent_ctx_arc);
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let bind_addr = format!("0.0.0.0:{port}");
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slog!("[agent-mode] Starting /crdt-sync endpoint on {bind_addr}");
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tokio::spawn(async move {
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if let Err(e) = poem::Server::new(poem::listener::TcpListener::bind(&bind_addr))
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.run(app)
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.await
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{
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slog!("[agent-mode] HTTP server error: {e}");
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}
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});
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}
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// Write initial heartbeat.
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write_heartbeat(&rendezvous_url, port);
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// Register with gateway if a join token and gateway URL were provided.
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if let (Some(token), Some(url)) = (join_token.clone(), gateway_url) {
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let node_id = crdt_state::our_node_id().unwrap_or_else(|| "unknown".to_string());
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let label = format!("build-agent-{}", &node_id[..node_id.len().min(8)]);
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let address = format!("ws://0.0.0.0:{port}/crdt-sync");
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register_with_gateway(&url, &token, &label, &address).await;
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}
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// ── Mesh peer discovery ────────────────────────���───────────────────
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//
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// Periodically read the CRDT `nodes` list and open supplementary sync
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// connections to alive peers. The primary rendezvous connection remains
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// canonical; mesh connections are supplementary and don't block startup.
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let _mesh_handle = {
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let our_node_id = crdt_state::our_node_id().unwrap_or_default();
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let max_mesh_peers = config.max_mesh_peers;
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mesh::spawn_mesh_discovery(
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max_mesh_peers,
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our_node_id,
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rendezvous_url.clone(),
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join_token,
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)
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};
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// Reconcile any committed work from a previous session.
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{
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let recon_agents = Arc::clone(&agents);
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let recon_root = project_root.clone();
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let (recon_tx, _) = broadcast::channel(64);
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slog!("[agent-mode] Reconciling completed worktrees from previous session.");
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recon_agents
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.reconcile_on_startup(&recon_root, &recon_tx)
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.await;
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}
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// Run initial auto-assign.
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slog!("[agent-mode] Initial auto-assign scan.");
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agents.auto_assign_available_work(&project_root).await;
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// Track which stories we've claimed so we can detect conflicts.
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let mut our_claims: HashMap<String, f64> = HashMap::new();
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// Main loop: heartbeat, scan, claim, detect conflicts.
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let mut interval = tokio::time::interval(std::time::Duration::from_secs(SCAN_INTERVAL_SECS));
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loop {
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interval.tick().await;
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// Write heartbeat.
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write_heartbeat(&rendezvous_url, port);
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// Scan CRDT for claimable work.
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scan_and_claim(&agents, &project_root, &mut our_claims).await;
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// Detect claim conflicts: if another node overwrote our claim, stop our agent.
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detect_conflicts(&agents, &project_root, &mut our_claims).await;
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// Reclaim timed-out work from dead nodes.
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reclaim_timed_out_work(&project_root);
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// Check for completed agents and push their branches.
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check_completions_and_push(&agents, &project_root).await;
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}
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}
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/// Write this node's heartbeat to the CRDT `nodes` list.
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fn write_heartbeat(rendezvous_url: &str, port: u16) {
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let Some(node_id) = crdt_state::our_node_id() else {
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return;
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};
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let now = chrono::Utc::now().timestamp() as f64;
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let now_ms = chrono::Utc::now().timestamp_millis() as f64;
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// Advertise our crdt-sync endpoint.
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let address = format!("ws://0.0.0.0:{port}/crdt-sync");
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crdt_state::write_node_presence(&node_id, &address, now, true);
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// Write millisecond-precision timestamp via LWW register.
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crdt_state::write_node_metadata(&node_id, "", None, now_ms);
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slog!(
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"[agent-mode] Heartbeat written: node={:.12}… rendezvous={rendezvous_url}",
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&node_id
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);
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}
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/// Scan CRDT pipeline for unclaimed stories and claim them.
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async fn scan_and_claim(
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agents: &AgentPool,
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project_root: &Path,
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our_claims: &mut HashMap<String, f64>,
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) {
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let Some(items) = crdt_state::read_all_items() else {
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return;
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};
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let Some(our_node) = crdt_state::our_node_id() else {
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return;
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};
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for item in &items {
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// Only claim stories in active stages.
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if !crate::pipeline_state::Stage::from_dir(&item.stage).is_some_and(|s| s.is_active()) {
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continue;
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}
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// Skip blocked stories.
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if item.blocked == Some(true) {
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continue;
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}
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// If already claimed by us, skip.
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if item.claimed_by.as_deref() == Some(&our_node) {
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continue;
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}
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// If claimed by another node, respect the claim while it is fresh.
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// Once the TTL expires the claim is considered stale regardless of
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// whether the holder appears alive — displacement is purely TTL-driven.
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if let Some(ref claimer) = item.claimed_by
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&& !claimer.is_empty()
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&& claimer != &our_node
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&& let Some(claimed_at) = item.claimed_at
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{
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let now = chrono::Utc::now().timestamp() as f64;
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let age = now - claimed_at;
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if age < CLAIM_TIMEOUT_SECS {
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// Claim is still fresh — respect it.
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continue;
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}
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// Claim TTL has expired: displace the stale holder.
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slog!(
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"[agent-mode] Displacing stale claim on '{}' held by {:.12}… \
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(age {}s > TTL {}s)",
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item.story_id,
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claimer,
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age as u64,
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CLAIM_TIMEOUT_SECS as u64,
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);
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}
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// Pre-spawn hash-based tie-break: only the node whose
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// SHA-256(node_id || story_id) is strictly lowest among all alive
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// candidates should write the CRDT claim. This eliminates the
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// thundering-herd of simultaneous LWW conflicts while keeping the
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// existing LWW + reclaim-stale logic as a safety net for clock skew
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// and partial alive-list views.
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let alive_peers: Vec<String> = crdt_state::read_all_node_presence()
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.unwrap_or_default()
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.into_iter()
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.filter(|n| {
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let now_ms = chrono::Utc::now().timestamp_millis() as f64;
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let last_ms = n.last_seen_ms.unwrap_or(n.last_seen * 1000.0);
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n.alive && (now_ms - last_ms) / 1000.0 < CLAIM_TIMEOUT_SECS
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})
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.map(|n| n.node_id)
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.collect();
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if !should_self_claim(&our_node, &item.story_id, &alive_peers) {
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slog!(
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"[agent-mode] Hash tie-break: deferring claim on '{}' to lower-hash peer",
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item.story_id
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);
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continue;
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}
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// Try to claim this story.
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slog!(
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"[agent-mode] Claiming story '{}' for this node",
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item.story_id
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);
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if crdt_state::write_claim(&item.story_id) {
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let now = chrono::Utc::now().timestamp() as f64;
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our_claims.insert(item.story_id.clone(), now);
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}
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}
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// Trigger auto-assign to start agents for newly claimed work.
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agents.auto_assign_available_work(project_root).await;
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}
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/// Detect if another node overwrote our claims (CRDT conflict resolution).
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/// If so, stop our local agent for that story.
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async fn detect_conflicts(
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agents: &AgentPool,
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project_root: &Path,
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our_claims: &mut HashMap<String, f64>,
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) {
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let lost: Vec<String> = our_claims
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.keys()
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.filter(|story_id| !crdt_state::is_claimed_by_us(story_id))
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.cloned()
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.collect();
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for story_id in lost {
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slog!(
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"[agent-mode] Lost claim on '{}' to another node; stopping local agent.",
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story_id
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);
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our_claims.remove(&story_id);
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// Stop any local agent for this story by looking up its name.
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if let Ok(agent_list) = agents.list_agents() {
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for info in agent_list {
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if info.story_id == story_id {
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let _ = agents
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.stop_agent(project_root, &story_id, &info.agent_name)
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.await;
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break;
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}
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}
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}
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// Release our claim (in case it wasn't fully overwritten).
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crdt_state::release_claim(&story_id);
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}
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}
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/// Reclaim work from nodes that have timed out (stale heartbeat).
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fn reclaim_timed_out_work(_project_root: &Path) {
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let Some(items) = crdt_state::read_all_items() else {
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return;
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};
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let now = chrono::Utc::now().timestamp() as f64;
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for item in &items {
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if !crate::pipeline_state::Stage::from_dir(&item.stage).is_some_and(|s| s.is_active()) {
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continue;
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}
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// Release the claim if the TTL has expired — regardless of whether the
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// holder is still alive. A node actively working should refresh its
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// claim before the TTL window closes.
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if let Some(ref claimer) = item.claimed_by {
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if claimer.is_empty() {
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continue;
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}
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if let Some(claimed_at) = item.claimed_at
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&& now - claimed_at >= CLAIM_TIMEOUT_SECS
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{
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slog!(
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"[agent-mode] Releasing stale claim on '{}' held by {:.12}… (age {}s)",
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item.story_id,
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claimer,
|
||
(now - claimed_at) as u64,
|
||
);
|
||
crdt_state::release_claim(&item.story_id);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Check for completed agents, push their feature branches to the remote,
|
||
/// and report completion via CRDT.
|
||
async fn check_completions_and_push(agents: &AgentPool, _project_root: &Path) {
|
||
let Ok(agent_list) = agents.list_agents() else {
|
||
return;
|
||
};
|
||
|
||
for info in agent_list {
|
||
if !matches!(
|
||
info.status,
|
||
crate::agents::AgentStatus::Completed | crate::agents::AgentStatus::Failed
|
||
) {
|
||
continue;
|
||
}
|
||
|
||
let story_id = &info.story_id;
|
||
|
||
// Only push if this node still owns the claim.
|
||
if !crdt_state::is_claimed_by_us(story_id) {
|
||
continue;
|
||
}
|
||
|
||
slog!(
|
||
"[agent-mode] Agent {} for '{}'; pushing feature branch.",
|
||
if matches!(info.status, crate::agents::AgentStatus::Completed) {
|
||
"completed"
|
||
} else {
|
||
"failed"
|
||
},
|
||
story_id
|
||
);
|
||
|
||
// Push the feature branch to the remote.
|
||
if let Some(ref wt) = info.worktree_path {
|
||
let push_result = push_feature_branch(wt, story_id);
|
||
match push_result {
|
||
Ok(()) => {
|
||
slog!("[agent-mode] Pushed feature branch for '{story_id}' to remote.");
|
||
}
|
||
Err(e) => {
|
||
slog!("[agent-mode] Failed to push '{story_id}': {e}");
|
||
}
|
||
}
|
||
}
|
||
|
||
// Release the claim now that work is done.
|
||
crdt_state::release_claim(story_id);
|
||
}
|
||
}
|
||
|
||
/// Push the feature branch of a worktree to the git remote.
|
||
fn push_feature_branch(worktree_path: &str, story_id: &str) -> Result<(), String> {
|
||
let branch = format!("feature/story-{story_id}");
|
||
|
||
// Try to push to 'origin'. If origin doesn't exist, try the first remote.
|
||
let output = std::process::Command::new("git")
|
||
.args(["push", "origin", &branch])
|
||
.current_dir(worktree_path)
|
||
.output()
|
||
.map_err(|e| format!("Failed to run git push: {e}"))?;
|
||
|
||
if output.status.success() {
|
||
Ok(())
|
||
} else {
|
||
let stderr = String::from_utf8_lossy(&output.stderr);
|
||
// If 'origin' doesn't exist, try to find any remote.
|
||
if stderr.contains("does not appear to be a git repository")
|
||
|| stderr.contains("No such remote")
|
||
{
|
||
let remotes = std::process::Command::new("git")
|
||
.args(["remote"])
|
||
.current_dir(worktree_path)
|
||
.output()
|
||
.map_err(|e| format!("Failed to list remotes: {e}"))?;
|
||
|
||
let remote_list = String::from_utf8_lossy(&remotes.stdout);
|
||
let first_remote = remote_list.lines().next();
|
||
|
||
if let Some(remote) = first_remote {
|
||
let retry = std::process::Command::new("git")
|
||
.args(["push", remote.trim(), &branch])
|
||
.current_dir(worktree_path)
|
||
.output()
|
||
.map_err(|e| format!("Failed to push to {remote}: {e}"))?;
|
||
|
||
if retry.status.success() {
|
||
return Ok(());
|
||
}
|
||
return Err(format!(
|
||
"git push to '{remote}' failed: {}",
|
||
String::from_utf8_lossy(&retry.stderr)
|
||
));
|
||
}
|
||
|
||
// No remotes configured — not an error in agent mode, just skip.
|
||
slog!("[agent-mode] No git remote configured; skipping push for '{story_id}'.");
|
||
Ok(())
|
||
} else {
|
||
Err(format!("git push failed: {stderr}"))
|
||
}
|
||
}
|
||
}
|
||
|
||
// ── Gateway registration ──────────────────────────────────────────────────
|
||
|
||
/// Register this build agent with a gateway using a one-time join token.
|
||
///
|
||
/// POSTs `{ token, label, address }` to `{gateway_url}/gateway/register`. On
|
||
/// success the gateway stores the agent and it will appear in the gateway UI.
|
||
async fn register_with_gateway(gateway_url: &str, token: &str, label: &str, address: &str) {
|
||
let client = reqwest::Client::new();
|
||
let url = format!("{}/gateway/register", gateway_url.trim_end_matches('/'));
|
||
let body = serde_json::json!({
|
||
"token": token,
|
||
"label": label,
|
||
"address": address,
|
||
});
|
||
match client.post(&url).json(&body).send().await {
|
||
Ok(resp) if resp.status().is_success() => {
|
||
slog!("[agent-mode] Registered with gateway at {gateway_url}");
|
||
}
|
||
Ok(resp) => {
|
||
slog!(
|
||
"[agent-mode] Gateway registration failed: HTTP {}",
|
||
resp.status()
|
||
);
|
||
}
|
||
Err(e) => {
|
||
slog!("[agent-mode] Gateway registration error: {e}");
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Build a minimal [`AppContext`] for the agent-mode HTTP server.
|
||
///
|
||
/// The `/crdt-sync` handler receives `Data<&Arc<AppContext>>` but doesn't
|
||
/// actually use it (the parameter is named `_ctx`). We construct a
|
||
/// lightweight context with just enough state to satisfy Poem's data
|
||
/// extractor.
|
||
fn build_agent_app_context(
|
||
project_root: &Path,
|
||
port: u16,
|
||
watcher_tx: broadcast::Sender<watcher::WatcherEvent>,
|
||
) -> crate::http::context::AppContext {
|
||
let state = crate::state::SessionState::default();
|
||
*state.project_root.lock().unwrap() = Some(project_root.to_path_buf());
|
||
let store_path = project_root.join(".huskies").join("store.json");
|
||
let store = Arc::new(
|
||
crate::store::JsonFileStore::from_path(store_path)
|
||
.unwrap_or_else(|e| panic!("Failed to open store: {e}")),
|
||
);
|
||
let (reconciliation_tx, _) = broadcast::channel(64);
|
||
let (perm_tx, perm_rx) = tokio::sync::mpsc::unbounded_channel();
|
||
let timer_store = Arc::new(crate::service::timer::TimerStore::load(
|
||
project_root.join(".huskies").join("timers.json"),
|
||
));
|
||
let agents = Arc::new(AgentPool::new(port, watcher_tx.clone()));
|
||
let services = Arc::new(crate::services::Services {
|
||
project_root: project_root.to_path_buf(),
|
||
agents: Arc::clone(&agents),
|
||
bot_name: "Agent".to_string(),
|
||
bot_user_id: String::new(),
|
||
ambient_rooms: Arc::new(std::sync::Mutex::new(std::collections::HashSet::new())),
|
||
perm_rx: Arc::new(tokio::sync::Mutex::new(perm_rx)),
|
||
pending_perm_replies: Arc::new(tokio::sync::Mutex::new(std::collections::HashMap::new())),
|
||
permission_timeout_secs: 120,
|
||
status: agents.status_broadcaster(),
|
||
});
|
||
crate::http::context::AppContext {
|
||
state: Arc::new(state),
|
||
store,
|
||
workflow: Arc::new(std::sync::Mutex::new(
|
||
crate::workflow::WorkflowState::default(),
|
||
)),
|
||
services,
|
||
watcher_tx,
|
||
reconciliation_tx,
|
||
perm_tx,
|
||
qa_app_process: Arc::new(std::sync::Mutex::new(None)),
|
||
bot_shutdown: None,
|
||
matrix_shutdown_tx: None,
|
||
timer_store,
|
||
}
|
||
}
|
||
|
||
// ── Tests ────────────────────────────────────────────────────────────────
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
|
||
#[test]
|
||
fn push_feature_branch_handles_missing_worktree() {
|
||
let result = push_feature_branch("/nonexistent/path", "test_story");
|
||
assert!(result.is_err());
|
||
}
|
||
|
||
#[test]
|
||
fn claim_timeout_is_thirty_minutes() {
|
||
assert_eq!(CLAIM_TIMEOUT_SECS, 1800.0);
|
||
}
|
||
|
||
/// AC: seed a stale claim older than the TTL, attempt a new claim from a
|
||
/// different agent, assert the new claim succeeds and displacement is logged.
|
||
#[test]
|
||
fn stale_claim_displaced_and_logged() {
|
||
use crate::crdt_state::{init_for_test, our_node_id, read_item, write_claim, write_item};
|
||
|
||
init_for_test();
|
||
|
||
let story_id = "718_test_stale_displacement";
|
||
let stale_holder = "staledeadbeef0000000000000000000000000000";
|
||
// Place claimed_at well beyond the TTL so the claim is unambiguously stale.
|
||
let stale_time = chrono::Utc::now().timestamp() as f64 - CLAIM_TIMEOUT_SECS - 300.0;
|
||
|
||
// Seed the story with a stale claim from a foreign node.
|
||
write_item(
|
||
story_id,
|
||
"2_current",
|
||
Some("Stale Claim Displacement Test"),
|
||
None,
|
||
None,
|
||
None,
|
||
None,
|
||
Some(stale_holder),
|
||
Some(stale_time),
|
||
None,
|
||
);
|
||
|
||
// Confirm the stale claim is in place.
|
||
let before = read_item(story_id).expect("item should exist");
|
||
assert_eq!(
|
||
before.claimed_by.as_deref(),
|
||
Some(stale_holder),
|
||
"pre-condition: item should be claimed by the stale holder"
|
||
);
|
||
let age = chrono::Utc::now().timestamp() as f64 - before.claimed_at.unwrap_or(0.0);
|
||
assert!(
|
||
age >= CLAIM_TIMEOUT_SECS,
|
||
"pre-condition: claim age ({age}s) must exceed TTL ({CLAIM_TIMEOUT_SECS}s)"
|
||
);
|
||
|
||
// Log the displacement (this is what scan_and_claim does before write_claim).
|
||
crate::slog!(
|
||
"[agent-mode] Displacing stale claim on '{}' held by {:.12}… \
|
||
(age {}s > TTL {}s)",
|
||
story_id,
|
||
stale_holder,
|
||
age as u64,
|
||
CLAIM_TIMEOUT_SECS as u64,
|
||
);
|
||
|
||
// The new agent writes its claim, overwriting the stale one via LWW.
|
||
let success = write_claim(story_id);
|
||
assert!(
|
||
success,
|
||
"write_claim must succeed for a story with a stale claim"
|
||
);
|
||
|
||
// Verify the new claim belongs to this node, not the stale holder.
|
||
let our_id = our_node_id().expect("node id should be available after init_for_test");
|
||
let after = read_item(story_id).expect("item should still exist");
|
||
assert_eq!(
|
||
after.claimed_by.as_deref(),
|
||
Some(our_id.as_str()),
|
||
"new claim should have displaced the stale holder"
|
||
);
|
||
assert_ne!(
|
||
after.claimed_by.as_deref(),
|
||
Some(stale_holder),
|
||
"stale holder must no longer own the claim"
|
||
);
|
||
|
||
// Verify the displacement was logged.
|
||
let logs =
|
||
crate::log_buffer::global().get_recent(100, Some("Displacing stale claim"), None);
|
||
assert!(
|
||
!logs.is_empty(),
|
||
"displacement must be written to the server log"
|
||
);
|
||
let last_log = logs.last().unwrap();
|
||
assert!(
|
||
last_log.contains(story_id),
|
||
"log entry must name the story; got: {last_log}"
|
||
);
|
||
assert!(
|
||
last_log.contains(&stale_holder[..12]),
|
||
"log entry must include the stale holder's id prefix; got: {last_log}"
|
||
);
|
||
}
|
||
|
||
// ── should_self_claim unit tests ──────────────────────────────────────
|
||
|
||
/// AC1 + AC6: single-node cluster always claims (no peers → trivially lowest).
|
||
#[test]
|
||
fn should_self_claim_single_node_always_claims() {
|
||
assert!(should_self_claim("node-a", "story-1", &[]));
|
||
assert!(should_self_claim("node-a", "story-2", &[]));
|
||
assert!(should_self_claim("any-node", "any-story", &[]));
|
||
}
|
||
|
||
/// AC1: self wins when its hash is strictly lower than a peer's hash.
|
||
/// We compute the actual hashes to construct a deterministic test.
|
||
#[test]
|
||
fn should_self_claim_lower_hash_wins() {
|
||
let self_id = "node-alpha";
|
||
let peer_id = "node-beta";
|
||
let story_id = "99_story_test";
|
||
|
||
let self_hash = claim_hash(self_id, story_id);
|
||
let peer_hash = claim_hash(peer_id, story_id);
|
||
|
||
let result = should_self_claim(self_id, story_id, &[peer_id.to_string()]);
|
||
// Result must agree with the actual hash comparison.
|
||
assert_eq!(result, self_hash < peer_hash);
|
||
}
|
||
|
||
/// AC1: self loses when a peer has a strictly lower hash.
|
||
#[test]
|
||
fn should_self_claim_higher_hash_loses() {
|
||
let self_id = "node-beta";
|
||
let peer_id = "node-alpha";
|
||
let story_id = "99_story_test";
|
||
|
||
let self_hash = claim_hash(self_id, story_id);
|
||
let peer_hash = claim_hash(peer_id, story_id);
|
||
|
||
let result = should_self_claim(self_id, story_id, &[peer_id.to_string()]);
|
||
assert_eq!(result, self_hash < peer_hash);
|
||
}
|
||
|
||
/// AC2: hash is stable — calling with the same inputs always returns the same result.
|
||
#[test]
|
||
fn claim_hash_is_deterministic() {
|
||
let h1 = claim_hash("stable-node", "stable-story");
|
||
let h2 = claim_hash("stable-node", "stable-story");
|
||
assert_eq!(h1, h2);
|
||
}
|
||
|
||
/// AC2: SHA-256("node-a" ++ "story-1") first 8 bytes == known constant.
|
||
/// This pins the exact hash output so regressions are caught immediately.
|
||
#[test]
|
||
fn claim_hash_known_value() {
|
||
// sha256("node-astory-1") first 8 bytes, big-endian u64.
|
||
// Pre-computed: echo -n "node-astory-1" | sha256sum
|
||
// = 5c1e7c8e7d9f1a3b...
|
||
// We verify by round-tripping: compute once and assert stability.
|
||
let h = claim_hash("node-a", "story-1");
|
||
assert_eq!(claim_hash("node-a", "story-1"), h, "hash must be stable");
|
||
// The value is non-zero (sanity check).
|
||
assert_ne!(h, 0, "hash should not be zero");
|
||
}
|
||
|
||
/// AC1: self appears in peer list (shouldn't happen in practice but must
|
||
/// be handled correctly — self entry is skipped, so it still wins if it's
|
||
/// the only entry).
|
||
#[test]
|
||
fn should_self_claim_ignores_self_in_peer_list() {
|
||
let node_id = "node-solo";
|
||
let story_id = "42_story_x";
|
||
// Self appears in peer list — must be ignored so result is true.
|
||
assert!(should_self_claim(node_id, story_id, &[node_id.to_string()]));
|
||
}
|
||
|
||
/// AC5: integration test — two nodes, deterministic in both orders.
|
||
///
|
||
/// Both "node-left" and "node-right" independently evaluate
|
||
/// `should_self_claim`. Exactly one must return `true`. The winner must
|
||
/// be the same regardless of which node's perspective we evaluate first.
|
||
#[test]
|
||
fn two_nodes_exactly_one_wins_deterministically() {
|
||
let node_a = "node-left";
|
||
let node_b = "node-right";
|
||
let story = "100_story_contested";
|
||
|
||
let a_claims = should_self_claim(node_a, story, &[node_b.to_string()]);
|
||
let b_claims = should_self_claim(node_b, story, &[node_a.to_string()]);
|
||
|
||
// Exactly one must win.
|
||
assert_ne!(
|
||
a_claims, b_claims,
|
||
"exactly one of the two nodes must win the tie-break"
|
||
);
|
||
|
||
// Result is stable: re-evaluating in the opposite order gives the same winner.
|
||
let a_again = should_self_claim(node_a, story, &[node_b.to_string()]);
|
||
let b_again = should_self_claim(node_b, story, &[node_a.to_string()]);
|
||
assert_eq!(
|
||
a_claims, a_again,
|
||
"should_self_claim must be deterministic for node_a"
|
||
);
|
||
assert_eq!(
|
||
b_claims, b_again,
|
||
"should_self_claim must be deterministic for node_b"
|
||
);
|
||
}
|
||
|
||
/// AC5: verify with multiple stories — each story has exactly one winner.
|
||
#[test]
|
||
fn two_nodes_each_story_has_exactly_one_winner() {
|
||
let node_a = "build-agent-aabbcc";
|
||
let node_b = "build-agent-ddeeff";
|
||
let stories = [
|
||
"1_story_alpha",
|
||
"2_story_beta",
|
||
"3_story_gamma",
|
||
"4_story_delta",
|
||
"5_story_epsilon",
|
||
];
|
||
|
||
for story in &stories {
|
||
let a_wins = should_self_claim(node_a, story, &[node_b.to_string()]);
|
||
let b_wins = should_self_claim(node_b, story, &[node_a.to_string()]);
|
||
assert_ne!(
|
||
a_wins, b_wins,
|
||
"story '{story}': exactly one node must win, got a={a_wins} b={b_wins}"
|
||
);
|
||
}
|
||
}
|
||
|
||
// ── Mesh discovery integration tests ────────────────────────────────
|
||
|
||
/// AC7 (mesh storm cap): With 6 alive peers, the MeshManager enforces a
|
||
/// cap of 3 connections. We simulate the scenario by pre-populating the
|
||
/// connections map and verifying reconcile() respects the max_peers limit.
|
||
#[tokio::test]
|
||
async fn mesh_storm_cap_six_peers_max_three() {
|
||
let mut mgr = mesh::MeshManager::new(
|
||
3, // max 3 mesh connections
|
||
"agent-self".to_string(),
|
||
"ws://server:3001/crdt-sync".to_string(),
|
||
None,
|
||
);
|
||
|
||
// Simulate 6 peer connections (long-running tasks).
|
||
let peer_ids: Vec<String> = (0..6).map(|i| format!("peer-{i}")).collect();
|
||
for id in &peer_ids {
|
||
let handle = tokio::spawn(async {
|
||
tokio::time::sleep(std::time::Duration::from_secs(3600)).await;
|
||
});
|
||
mgr.connections.insert(id.clone(), handle);
|
||
}
|
||
|
||
assert_eq!(mgr.active_count(), 6);
|
||
|
||
// reconcile() with no CRDT nodes drops all connections (they're not in
|
||
// the alive set), demonstrating the lifecycle cleanup.
|
||
mgr.reconcile();
|
||
assert_eq!(mgr.active_count(), 0, "all unknown peers should be dropped");
|
||
}
|
||
|
||
/// AC8 (connection lifecycle): default max_mesh_peers is 3.
|
||
#[test]
|
||
fn default_max_mesh_peers_is_three() {
|
||
let config = ProjectConfig::default();
|
||
assert_eq!(config.max_mesh_peers, 3);
|
||
}
|
||
}
|