Handle stale workspaces: 409 conflict auto-cleanup + verbose logging

When the orchestrator restarts, it loses in-memory queue state. If a
stale workspace still exists, createWorkspace now auto-deletes it and
retries instead of failing with 409. Also adds --verbose to Claude Code
invocation for better task log debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

coder/cloudflare-worker/main.tf

@@ -208,6 +208,15 @@ data "coder_parameter" "anthropic_api_key" {
   mutable      = false
 }
 
+data "coder_parameter" "callback_url" {
+  name         = "callback_url"
+  display_name = "Task Complete Callback URL"
+  description  = "URL to POST when task finishes (set by orchestrator)"
+  type         = "string"
+  default      = ""
+  mutable      = false
+}
+
 data "coder_parameter" "deploy_env" {
   name         = "deploy_env"
   display_name = "Deploy Environment"
@@ -433,6 +442,25 @@ resource "coder_agent" "main" {
     web_terminal           = true
   }
 
+  metadata {
+    display_name = "Task Status"
+    key          = "task_status"
+    script       = <<-EOS
+      if [ -f ~/task-output.log ]; then
+        if grep -q "Task completed" ~/task-output.log 2>/dev/null; then
+          echo "✅ Complete"
+        else
+          echo "⏳ Running ($(wc -l < ~/task-output.log) lines)"
+        fi
+      elif [ -n "$TASK_TYPE" ]; then
+        echo "⏳ Starting..."
+      else
+        echo "Interactive"
+      fi
+    EOS
+    interval     = 10
+  }
+
   env = {
     ANTHROPIC_API_KEY = data.coder_parameter.anthropic_api_key.value
     GITHUB_TOKEN      = data.coder_external_auth.github.access_token
@@ -443,6 +471,7 @@ resource "coder_agent" "main" {
     ISSUE_NUMBER      = data.coder_parameter.issue_number.value
     REPO_CLONE_URL    = data.coder_parameter.repo_clone_url.value
     DEPLOY_ENV        = data.coder_parameter.deploy_env.value
+    CALLBACK_URL      = data.coder_parameter.callback_url.value
   }
 
   startup_script = <<-EOT
@@ -506,6 +535,41 @@ resource "coder_agent" "main" {
       npm run db:migrate:local
     fi
 
+    # --- Start log viewer on port 13338 ---
+    if [ -n "$TASK_TYPE" ]; then
+      touch ~/task-output.log
+      cat > ~/log-server.sh << 'LOGEOF'
+#!/bin/bash
+while true; do
+  {
+    echo "HTTP/1.1 200 OK"
+    echo "Content-Type: text/html; charset=utf-8"
+    echo "Connection: close"
+    echo ""
+    echo "<html><head><title>Task Log</title>"
+    echo "<meta http-equiv='refresh' content='5'>"
+    echo "<style>body{background:#1e1e1e;color:#d4d4d4;font-family:monospace;font-size:13px;padding:16px;white-space:pre-wrap;}"
+    echo "h2{color:#569cd6;margin:0 0 8px}.meta{color:#6a9955;margin-bottom:16px;display:block}</style></head><body>"
+    echo "<h2>$TASK_TYPE #$ISSUE_NUMBER — $(hostname)</h2>"
+    if [ -f ~/task-output.log ]; then
+      LINES=$(wc -l < ~/task-output.log)
+      if grep -q "Task completed" ~/task-output.log 2>/dev/null; then
+        echo "<span class='meta'>Status: ✅ Complete ($LINES lines)</span>"
+      else
+        echo "<span class='meta'>Status: ⏳ Running ($LINES lines) — auto-refreshing every 5s</span>"
+      fi
+      sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g' ~/task-output.log
+    else
+      echo "Waiting for task to start..."
+    fi
+    echo "</body></html>"
+  } | nc -l -p 13338 -q 1 2>/dev/null || true
+done
+LOGEOF
+      chmod +x ~/log-server.sh
+      nohup bash ~/log-server.sh &>/dev/null &
+    fi
+
     # --- Automated task execution ---
     if [ -n "$TASK_TYPE" ] && [ -d ~/project ]; then
       cd ~/project
@@ -515,14 +579,38 @@ resource "coder_agent" "main" {
         ARGS="$DEPLOY_ENV"
       fi
 
-      # Run Claude Code in non-interactive mode
-      claude --print --dangerously-skip-permissions "/project:$TASK_TYPE $ARGS" 2>&1 | tee ~/task-output.log
+      # Run Claude Code in non-interactive mode with tool access
+      claude -p --dangerously-skip-permissions --verbose "/project:$TASK_TYPE $ARGS" 2>&1 | tee ~/task-output.log
+      EXIT_CODE=$?
+      echo "Claude exited with code: $EXIT_CODE" | tee -a ~/task-output.log
 
       echo "Task completed. Output saved to ~/task-output.log"
+
+      # Notify orchestrator that the task is done
+      if [ -n "$CALLBACK_URL" ]; then
+        curl -s -X POST -H "Content-Type: application/json" \
+          -d '{"status":"complete"}' \
+          "$CALLBACK_URL" || echo "Callback failed (non-fatal)"
+      fi
     fi
   EOT
 }
 
+resource "coder_app" "task_log" {
+  agent_id     = coder_agent.main.id
+  slug         = "task-log"
+  display_name = "Task Log"
+  icon         = "/icon/document.svg"
+  url          = "http://localhost:13338"
+  share        = "owner"
+
+  healthcheck {
+    url       = "http://localhost:13338"
+    interval  = 10
+    threshold = 3
+  }
+}
+
 # =============================================================================
 # Main Workspace Deployment
 # =============================================================================
@@ -603,7 +691,7 @@ resource "kubernetes_deployment_v1" "workspace" {
 
         container {
           name  = "coder-agent"
-          image = "codercom/enterprise-base:ubuntu-arm64"
+          image = "codercom/enterprise-base:latest"
 
           command = ["sh", "-c", coder_agent.main.init_script]
 
@@ -657,6 +745,11 @@ resource "kubernetes_deployment_v1" "workspace" {
             value = data.coder_parameter.deploy_env.value
           }
 
+          env {
+            name  = "CALLBACK_URL"
+            value = data.coder_parameter.callback_url.value
+          }
+
           resources {
             requests = {
               cpu    = "${tonumber(data.coder_parameter.cpu.value) * 500}m"

src/config.ts

@@ -19,6 +19,8 @@ export interface Config {
   botReviewUsername: string;
   /** Gitea base URL (e.g. https://gitea.samson.media) */
   giteaUrl: string;
+  /** Base URL for task-complete callbacks (e.g. https://sdlc.samson.media) */
+  callbackUrl: string;
   /** Optional webhook secret for verifying Gitea signatures */
   webhookSecret?: string;
 }
@@ -43,6 +45,7 @@ export function loadConfig(): Config {
     botDevUsername: process.env.BOT_DEV_USERNAME || "claude-dev",
     botReviewUsername: process.env.BOT_REVIEW_USERNAME || "claude-review",
     giteaUrl: process.env.GITEA_URL || "https://gitea.samson.media",
+    callbackUrl: required("CALLBACK_URL"),
     webhookSecret: process.env.WEBHOOK_SECRET,
   };
 }

src/handlers/issue-comment.ts

@@ -1,14 +1,14 @@
 import type { Context } from "hono";
 import type { IssueCommentEvent, TaskRequest } from "../types.js";
-import type { CoderClient } from "../services/coder.js";
+import type { TaskQueue } from "../queue.js";
 import type { Config } from "../config.js";
 
 /**
- * Issue comment created → re-trigger analyst if still in analysis.
+ * Issue comment created or edited → re-trigger analyst if still in analysis.
  *
  * Replaces: issue-comment-reply.json
  */
-export function issueComment(config: Config, coder: CoderClient) {
+export function issueComment(config: Config, queue: TaskQueue) {
   return async (c: Context) => {
     const event = await c.req.json<IssueCommentEvent>();
 
@@ -43,11 +43,8 @@ export function issueComment(config: Config, coder: CoderClient) {
       giteaToken: config.giteaDevToken,
     };
 
-    console.log(`[issue-comment] #${task.issueNumber} → re-trigger analyst`);
+    const queued = queue.enqueue(task);
 
-    const workspace = await coder.createWorkspace(task);
-    console.log(`[issue-comment] workspace created: ${workspace.name}`);
-
-    return c.json({ ok: true, workspace: workspace.name });
+    return c.json({ ok: true, queued });
   };
 }

src/handlers/issue-label.ts

@@ -1,7 +1,6 @@
 import type { Context } from "hono";
 import type { IssueEvent, TaskRequest } from "../types.js";
-import type { CoderClient } from "../services/coder.js";
-import type { GiteaClient } from "../services/gitea.js";
+import type { TaskQueue } from "../queue.js";
 import type { Config } from "../config.js";
 
 const LABEL_TO_TASK: Record<string, string> = {
@@ -19,7 +18,7 @@ const REVIEW_TASKS = new Set(["test"]);
  *
  * Replaces: issue-stage-transition.json
  */
-export function issueLabel(config: Config, coder: CoderClient, gitea: GiteaClient) {
+export function issueLabel(config: Config, queue: TaskQueue) {
   return async (c: Context) => {
     const event = await c.req.json<IssueEvent>();
 
@@ -55,18 +54,11 @@ export function issueLabel(config: Config, coder: CoderClient, gitea: GiteaClien
       giteaToken,
     };
 
-    console.log(`[issue-label] #${task.issueNumber} → ${taskType}`);
+    const queued = queue.enqueue(task, {
+      useReviewAccount: false,
+      body: `🤖 SDLC stage transition: **${taskType}** — workspace queued.`,
+    });
 
-    const workspace = await coder.createWorkspace(task);
-    console.log(`[issue-label] workspace created: ${workspace.name}`);
-
-    await gitea.commentOnIssue(
-      org,
-      repo,
-      event.issue.number,
-      `🤖 SDLC stage transition: **${taskType}** — workspace created.`,
-    );
-
-    return c.json({ ok: true, workspace: workspace.name });
+    return c.json({ ok: true, queued });
   };
 }

src/handlers/issue-triage.ts

@@ -1,7 +1,6 @@
 import type { Context } from "hono";
 import type { IssueEvent, TaskRequest } from "../types.js";
-import type { CoderClient } from "../services/coder.js";
-import type { GiteaClient } from "../services/gitea.js";
+import type { TaskQueue } from "../queue.js";
 import type { Config } from "../config.js";
 
 /**
@@ -9,7 +8,7 @@ import type { Config } from "../config.js";
  *
  * Replaces: gitea-issue-triage.json
  */
-export function issueTriage(config: Config, coder: CoderClient, gitea: GiteaClient) {
+export function issueTriage(config: Config, queue: TaskQueue) {
   return async (c: Context) => {
     const event = await c.req.json<IssueEvent>();
 
@@ -32,18 +31,11 @@ export function issueTriage(config: Config, coder: CoderClient, gitea: GiteaClie
       giteaToken: config.giteaDevToken,
     };
 
-    console.log(`[issue-triage] #${task.issueNumber} → ${taskType}`);
+    const queued = queue.enqueue(task, {
+      useReviewAccount: false,
+      body: `🤖 Issue received. Starting **${taskType}** stage.`,
+    });
 
-    const workspace = await coder.createWorkspace(task);
-    console.log(`[issue-triage] workspace created: ${workspace.name}`);
-
-    await gitea.commentOnIssue(
-      org,
-      repo,
-      event.issue.number,
-      `🤖 Issue received. Starting **${taskType}** stage.`,
-    );
-
-    return c.json({ ok: true, workspace: workspace.name });
+    return c.json({ ok: true, queued });
   };
 }

src/handlers/maintenance.ts

@@ -1,4 +1,4 @@
-import type { CoderClient } from "../services/coder.js";
+import type { TaskQueue } from "../queue.js";
 import type { Config } from "../config.js";
 import type { TaskRequest } from "../types.js";
 
@@ -9,15 +9,11 @@ export interface MaintenanceRepo {
 }
 
 /**
- * Weekly maintenance cron → create a maintenance workspace.
+ * Weekly maintenance cron → enqueue a maintenance workspace per repo.
  *
  * Replaces: scheduled-maintenance.json
  */
-export function runMaintenance(
-  config: Config,
-  coder: CoderClient,
-  repos: MaintenanceRepo[],
-) {
+export function runMaintenance(config: Config, queue: TaskQueue, repos: MaintenanceRepo[]) {
   return async () => {
     for (const entry of repos) {
       const task: TaskRequest = {
@@ -29,17 +25,7 @@ export function runMaintenance(
         giteaToken: config.giteaDevToken,
       };
 
-      try {
-        const workspace = await coder.createWorkspace(task);
-        console.log(
-          `[maintenance] ${entry.org}/${entry.repo} → workspace: ${workspace.name}`,
-        );
-      } catch (err) {
-        console.error(
-          `[maintenance] failed for ${entry.org}/${entry.repo}:`,
-          err,
-        );
-      }
+      queue.enqueue(task);
     }
   };
 }

src/handlers/pr-review.ts

@@ -1,6 +1,6 @@
 import type { Context } from "hono";
 import type { PullRequestEvent, TaskRequest } from "../types.js";
-import type { CoderClient } from "../services/coder.js";
+import type { TaskQueue } from "../queue.js";
 import type { GiteaClient } from "../services/gitea.js";
 import type { Config } from "../config.js";
 
@@ -10,7 +10,7 @@ import type { Config } from "../config.js";
  *
  * Replaces: pr-review-trigger.json
  */
-export function prReview(config: Config, coder: CoderClient, gitea: GiteaClient) {
+export function prReview(config: Config, queue: TaskQueue, gitea: GiteaClient) {
   return async (c: Context) => {
     const event = await c.req.json<PullRequestEvent>();
 
@@ -40,11 +40,8 @@ export function prReview(config: Config, coder: CoderClient, gitea: GiteaClient)
       giteaToken: config.giteaReviewToken,
     };
 
-    console.log(`[pr-review] PR #${prNumber} → review-code`);
+    const queued = queue.enqueue(task);
 
-    const workspace = await coder.createWorkspace(task);
-    console.log(`[pr-review] workspace created: ${workspace.name}`);
-
-    return c.json({ ok: true, workspace: workspace.name });
+    return c.json({ ok: true, queued });
   };
 }

src/handlers/pr-rework.ts

@@ -1,7 +1,6 @@
 import type { Context } from "hono";
 import type { PullRequestReviewEvent, TaskRequest } from "../types.js";
-import type { CoderClient } from "../services/coder.js";
-import type { GiteaClient } from "../services/gitea.js";
+import type { TaskQueue } from "../queue.js";
 import type { Config } from "../config.js";
 
 /**
@@ -9,7 +8,7 @@ import type { Config } from "../config.js";
  *
  * Replaces: pr-review-rework.json
  */
-export function prRework(config: Config, coder: CoderClient, gitea: GiteaClient) {
+export function prRework(config: Config, queue: TaskQueue) {
   return async (c: Context) => {
     const event = await c.req.json<PullRequestReviewEvent>();
 
@@ -43,18 +42,11 @@ export function prRework(config: Config, coder: CoderClient, gitea: GiteaClient)
       giteaToken,
     };
 
-    console.log(`[pr-rework] PR #${prNumber} ${reviewState} → ${taskType}`);
+    const queued = queue.enqueue(task, {
+      useReviewAccount: false,
+      body: `🤖 Review outcome: **${taskType}** — workspace queued.`,
+    });
 
-    const workspace = await coder.createWorkspace(task);
-    console.log(`[pr-rework] workspace created: ${workspace.name}`);
-
-    await gitea.commentOnIssue(
-      org,
-      repo,
-      prNumber,
-      `🤖 Review outcome: starting **${taskType}** stage.`,
-    );
-
-    return c.json({ ok: true, workspace: workspace.name });
+    return c.json({ ok: true, queued });
   };
 }

src/handlers/release.ts

@@ -1,7 +1,6 @@
 import type { Context } from "hono";
 import type { IssueEvent, TaskRequest } from "../types.js";
-import type { CoderClient } from "../services/coder.js";
-import type { GiteaClient } from "../services/gitea.js";
+import type { TaskQueue } from "../queue.js";
 import type { Config } from "../config.js";
 
 /**
@@ -10,7 +9,7 @@ import type { Config } from "../config.js";
  *
  * Replaces: release-process.json
  */
-export function release(config: Config, coder: CoderClient, gitea: GiteaClient) {
+export function release(config: Config, queue: TaskQueue) {
   return async (c: Context) => {
     const event = await c.req.json<IssueEvent>();
 
@@ -52,18 +51,11 @@ export function release(config: Config, coder: CoderClient, gitea: GiteaClient)
       giteaToken: config.giteaDevToken,
     };
 
-    console.log(`[release] #${task.issueNumber} → release`);
+    const queued = queue.enqueue(task, {
+      useReviewAccount: false,
+      body: `🤖 Release process started.`,
+    });
 
-    const workspace = await coder.createWorkspace(task);
-    console.log(`[release] workspace created: ${workspace.name}`);
-
-    await gitea.commentOnIssue(
-      org,
-      repo,
-      event.issue.number,
-      `🤖 Release process started.`,
-    );
-
-    return c.json({ ok: true, workspace: workspace.name });
+    return c.json({ ok: true, queued });
   };
 }

src/index.ts

@@ -6,6 +6,7 @@ import cron from "node-cron";
 import { loadConfig } from "./config.js";
 import { CoderClient } from "./services/coder.js";
 import { GiteaClient } from "./services/gitea.js";
+import { TaskQueue } from "./queue.js";
 
 import { issueTriage } from "./handlers/issue-triage.js";
 import { issueLabel } from "./handlers/issue-label.js";
@@ -23,26 +24,41 @@ const config = loadConfig();
 const coderClient = new CoderClient(config);
 const giteaClient = new GiteaClient(config);
 
+const concurrency = parseInt(process.env.QUEUE_CONCURRENCY || "2", 10);
+const queue = new TaskQueue(coderClient, giteaClient, concurrency);
+
 const app = new Hono();
 app.use("*", logger());
 
 // ---------------------------------------------------------------------------
-// Health check
+// Health check + queue status
 // ---------------------------------------------------------------------------
 
 app.get("/health", (c) => c.json({ status: "ok" }));
+app.get("/queue", (c) => c.json(queue.status()));
 
 // ---------------------------------------------------------------------------
 // Webhook endpoints — same paths as the n8n webhooks so Gitea config
 // can stay unchanged (just point to new host).
 // ---------------------------------------------------------------------------
 
-app.post("/webhook/gitea-issue-triage", issueTriage(config, coderClient, giteaClient));
-app.post("/webhook/gitea-issue-label", issueLabel(config, coderClient, giteaClient));
-app.post("/webhook/gitea-issue-comment", issueComment(config, coderClient));
-app.post("/webhook/gitea-pr-review", prReview(config, coderClient, giteaClient));
-app.post("/webhook/gitea-pr-review-rework", prRework(config, coderClient, giteaClient));
-app.post("/webhook/gitea-release", release(config, coderClient, giteaClient));
+app.post("/webhook/gitea-issue-triage", issueTriage(config, queue));
+app.post("/webhook/gitea-issue-label", issueLabel(config, queue));
+app.post("/webhook/gitea-issue-comment", issueComment(config, queue));
+app.post("/webhook/gitea-pr-review", prReview(config, queue, giteaClient));
+app.post("/webhook/gitea-pr-review-rework", prRework(config, queue));
+app.post("/webhook/gitea-release", release(config, queue));
+
+// ---------------------------------------------------------------------------
+// Task-complete callback — workspaces call this when done
+// ---------------------------------------------------------------------------
+
+app.post("/webhook/task-complete/:name", async (c) => {
+  const name = c.req.param("name");
+  console.log(`[callback] task-complete received for: ${name}`);
+  const found = await queue.taskComplete(name);
+  return c.json({ ok: true, found });
+});
 
 // ---------------------------------------------------------------------------
 // Scheduled maintenance cron (Monday 9:00 AM)
@@ -50,7 +66,7 @@ app.post("/webhook/gitea-release", release(config, coderClient, giteaClient));
 
 const maintenanceRepos = parseMaintenanceRepos();
 if (maintenanceRepos.length > 0) {
-  const maintenanceFn = runMaintenance(config, coderClient, maintenanceRepos);
+  const maintenanceFn = runMaintenance(config, queue, maintenanceRepos);
 
   cron.schedule("0 9 * * 1", () => {
     console.log("[cron] running weekly maintenance");
@@ -69,7 +85,7 @@ if (maintenanceRepos.length > 0) {
 // ---------------------------------------------------------------------------
 
 serve({ fetch: app.fetch, port: config.port }, (info) => {
-  console.log(`SDLC Orchestrator listening on :${info.port}`);
+  console.log(`SDLC Orchestrator listening on :${info.port} (concurrency: ${concurrency})`);
 });
 
 // ---------------------------------------------------------------------------

src/queue.ts

@@ -0,0 +1,179 @@
+import type { TaskRequest } from "./types.js";
+import type { CoderClient } from "./services/coder.js";
+import type { GiteaClient } from "./services/gitea.js";
+
+interface QueuedTask {
+  task: TaskRequest;
+  comment?: { useReviewAccount: boolean; body: string };
+}
+
+interface ActiveWorkspace {
+  workspaceId: string;
+  workspaceName: string;
+  startedAt: Date;
+}
+
+/**
+ * Task queue with deduplication, concurrency control, and workspace lifecycle.
+ *
+ * - Tasks are keyed by `{taskType}-{repo}-{issue}` for dedup
+ * - If a task with the same key is pending, running, or has an active workspace, new requests are dropped
+ * - Concurrency is configurable (defaults to 2)
+ * - Tracks active workspaces and stops them on task-complete callback
+ */
+export class TaskQueue {
+  private pending = new Map<string, QueuedTask>();
+  private running = new Set<string>();
+  private active = new Map<string, ActiveWorkspace>();
+  private concurrency: number;
+  private coder: CoderClient;
+  private gitea: GiteaClient;
+
+  constructor(coder: CoderClient, gitea: GiteaClient, concurrency = 2) {
+    this.coder = coder;
+    this.gitea = gitea;
+    this.concurrency = concurrency;
+  }
+
+  /** Build a dedup key for a task. */
+  static key(task: TaskRequest): string {
+    return `${task.taskType}-${task.giteaRepo}-${task.issueNumber}`;
+  }
+
+  /** Build the workspace name (matches the dedup key). */
+  static workspaceName(task: TaskRequest): string {
+    return `${task.taskType}-${task.giteaRepo}-${task.issueNumber}`;
+  }
+
+  /**
+   * Enqueue a task. Returns true if queued, false if deduplicated (dropped).
+   */
+  enqueue(
+    task: TaskRequest,
+    comment?: { useReviewAccount: boolean; body: string },
+  ): boolean {
+    const key = TaskQueue.key(task);
+
+    if (this.active.has(key)) {
+      console.log(`[queue] dropped (active workspace): ${key}`);
+      return false;
+    }
+
+    if (this.running.has(key)) {
+      console.log(`[queue] dropped (running): ${key}`);
+      return false;
+    }
+
+    if (this.pending.has(key)) {
+      console.log(`[queue] dropped (pending): ${key}`);
+      return false;
+    }
+
+    this.pending.set(key, { task, comment });
+    console.log(
+      `[queue] enqueued: ${key} (pending: ${this.pending.size}, running: ${this.running.size}/${this.concurrency}, active: ${this.active.size})`,
+    );
+
+    this.drain();
+    return true;
+  }
+
+  /**
+   * Handle task-complete callback from a workspace.
+   * Stops the workspace via Coder API and removes it from active tracking.
+   */
+  async taskComplete(workspaceName: string): Promise<boolean> {
+    const entry = this.active.get(workspaceName);
+    if (!entry) {
+      console.log(`[queue] task-complete for unknown workspace: ${workspaceName}`);
+      return false;
+    }
+
+    const elapsed = Math.round(
+      (Date.now() - entry.startedAt.getTime()) / 1000,
+    );
+    console.log(
+      `[queue] task complete: ${workspaceName} (ran for ${elapsed}s) — stopping workspace`,
+    );
+
+    this.active.delete(workspaceName);
+
+    try {
+      await this.coder.deleteWorkspace(entry.workspaceId);
+      console.log(`[queue] workspace deleted: ${workspaceName}`);
+    } catch (err) {
+      console.error(`[queue] failed to delete workspace ${workspaceName}:`, err);
+    }
+
+    // Drain in case pending tasks were waiting for capacity
+    this.drain();
+
+    return true;
+  }
+
+  /** Process queued tasks up to the concurrency limit. */
+  private drain(): void {
+    const totalInFlight = this.running.size + this.active.size;
+    while (totalInFlight + this.pending.size > 0 && this.running.size + this.active.size < this.concurrency && this.pending.size > 0) {
+      const [key, entry] = this.pending.entries().next().value!;
+      this.pending.delete(key);
+      this.running.add(key);
+      this.process(key, entry);
+    }
+  }
+
+  private async process(key: string, entry: QueuedTask): Promise<void> {
+    const { task, comment } = entry;
+
+    try {
+      console.log(`[queue] processing: ${key}`);
+      const workspace = await this.coder.createWorkspace(task);
+      console.log(`[queue] workspace created: ${workspace.name} (id: ${workspace.id})`);
+
+      // Move from running → active (workspace is now alive, waiting for callback)
+      this.active.set(key, {
+        workspaceId: workspace.id,
+        workspaceName: workspace.name,
+        startedAt: new Date(),
+      });
+
+      if (comment) {
+        await this.gitea.commentOnIssue(
+          task.giteaOrg,
+          task.giteaRepo,
+          task.issueNumber,
+          comment.body,
+          comment.useReviewAccount,
+        );
+      }
+    } catch (err) {
+      console.error(`[queue] failed: ${key}`, err);
+    } finally {
+      this.running.delete(key);
+      // Don't drain here — active workspaces count toward concurrency
+    }
+  }
+
+  /** Current queue status for health/debug endpoints. */
+  status(): {
+    pending: string[];
+    running: string[];
+    active: Record<string, { workspaceId: string; elapsed: number }>;
+    concurrency: number;
+  } {
+    const activeMap: Record<string, { workspaceId: string; elapsed: number }> = {};
+    for (const [key, entry] of this.active) {
+      activeMap[key] = {
+        workspaceId: entry.workspaceId,
+        elapsed: Math.round((Date.now() - entry.startedAt.getTime()) / 1000),
+      };
+    }
+
+    return {
+      pending: [...this.pending.keys()],
+      running: [...this.running.keys()],
+      active: activeMap,
+      concurrency: this.concurrency,
+    };
+  }
+}

src/services/coder.ts

@@ -1,25 +1,24 @@
 import type { Config } from "../config.js";
 import type { TaskRequest } from "../types.js";
+import { TaskQueue } from "../queue.js";
 
 export class CoderClient {
   private baseUrl: string;
   private token: string;
   private templateId: string;
   private anthropicApiKey: string;
+  private callbackUrl: string;
 
   constructor(config: Config) {
     this.baseUrl = config.coderUrl.replace(/\/$/, "");
     this.token = config.coderToken;
     this.templateId = config.coderTemplateId;
     this.anthropicApiKey = config.anthropicApiKey;
+    this.callbackUrl = config.callbackUrl;
   }
 
   async createWorkspace(task: TaskRequest): Promise<{ id: string; name: string }> {
-    const timestamp = new Date()
-      .toISOString()
-      .replace(/[-:T]/g, "")
-      .slice(8, 14); // HHmmss
-    const name = `${task.taskType}-${task.issueNumber}-${timestamp}`;
+    const name = TaskQueue.workspaceName(task);
 
     const body = {
       name,
@@ -32,6 +31,7 @@ export class CoderClient {
         { name: "gitea_org", value: task.giteaOrg },
         { name: "gitea_repo", value: task.giteaRepo },
         { name: "anthropic_api_key", value: this.anthropicApiKey },
+        { name: "callback_url", value: `${this.callbackUrl}/webhook/task-complete/${name}` },
         ...(task.deployEnv
           ? [{ name: "deploy_env", value: task.deployEnv }]
           : []),
@@ -50,6 +50,18 @@ export class CoderClient {
       },
     );
 
+    // Handle 409 conflict — stale workspace from a previous orchestrator instance
+    if (res.status === 409) {
+      console.log(`[coder] workspace "${name}" already exists — deleting stale workspace and retrying`);
+      const existing = await this.findWorkspaceByName(name);
+      if (existing) {
+        await this.deleteWorkspace(existing.id);
+        // Wait for deletion to propagate
+        await new Promise((resolve) => setTimeout(resolve, 5000));
+      }
+      return this.createWorkspace(task);
+    }
+
     if (!res.ok) {
       const text = await res.text();
       throw new Error(`Coder API error ${res.status}: ${text}`);
@@ -58,4 +70,57 @@ export class CoderClient {
     const data = (await res.json()) as { id: string; name: string };
     return { id: data.id, name: data.name };
   }
+
+  async stopWorkspace(workspaceId: string): Promise<void> {
+    const res = await fetch(
+      `${this.baseUrl}/api/v2/workspaces/${workspaceId}/builds`,
+      {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          "Coder-Session-Token": this.token,
+        },
+        body: JSON.stringify({ transition: "stop" }),
+      },
+    );
+
+    if (!res.ok) {
+      const text = await res.text();
+      throw new Error(`Coder stop error ${res.status}: ${text}`);
+    }
+  }
+
+  async deleteWorkspace(workspaceId: string): Promise<void> {
+    const res = await fetch(
+      `${this.baseUrl}/api/v2/workspaces/${workspaceId}`,
+      {
+        method: "DELETE",
+        headers: {
+          "Coder-Session-Token": this.token,
+        },
+      },
+    );
+
+    if (!res.ok) {
+      const text = await res.text();
+      throw new Error(`Coder delete error ${res.status}: ${text}`);
+    }
+  }
+
+  async findWorkspaceByName(name: string): Promise<{ id: string } | null> {
+    const res = await fetch(
+      `${this.baseUrl}/api/v2/workspaces?q=name:${encodeURIComponent(name)}`,
+      {
+        headers: {
+          "Coder-Session-Token": this.token,
+        },
+      },
+    );
+
+    if (!res.ok) return null;
+
+    const data = (await res.json()) as { workspaces: Array<{ id: string; name: string }> };
+    const match = data.workspaces?.find((w) => w.name === name);
+    return match ? { id: match.id } : null;
+  }
 }