Add task queue with dedup and concurrency control

- Tasks keyed by {taskType}-{repo}-{issue} for deduplication
- Duplicate requests (pending or running) are dropped
- Configurable concurrency via QUEUE_CONCURRENCY env (default 2)
- Workspace names now {taskType}-{repo}-{issue} for observability
- GET /queue endpoint shows pending/running tasks
- All handlers route through the queue instead of calling Coder directly

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

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 });
   };
 }