ci: migrate to GitHub Actions

.dockerignore

@@ -4,5 +4,5 @@ tests/
 CLAUDE.md
 README.md
 .gitignore
-.circleci/
+.github/
 LICENSE

.github/workflows/ci.yml

@@ -0,0 +1,95 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+      - "release/**"
+    tags:
+      - "v*"
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+      - name: Set up Deno
+        uses: denoland/setup-deno@v2
+        with:
+          deno-version: 2.7.6
+      - name: Build executable
+        run: |
+          touch persist.dat
+          deno compile \
+            --allow-read \
+            --allow-write=./persist.dat \
+            --allow-net=0.0.0.0:3000 \
+            --allow-env=HOST,PORT,PERSIST,QUEUE_API_TOKEN \
+            main.ts
+      - name: Run tests
+        run: deno test --allow-read --allow-write --allow-net --allow-env --allow-run
+
+  mutation-mutasaurus:
+    name: Mutation testing (Mutasaurus)
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+      - name: Set up Deno
+        uses: denoland/setup-deno@v2
+        with:
+          deno-version: 2.7.6
+      - name: Run Mutasaurus
+        run: |
+          touch persist.dat
+          deno run \
+            --allow-read \
+            --allow-write \
+            --allow-net \
+            --allow-env \
+            --allow-run \
+            --allow-sys \
+            --allow-ffi \
+            --node-modules-dir=auto \
+            mutation/mutasaurus_ci.ts
+
+  mutation-stryker:
+    name: Mutation testing (Stryker)
+    needs: mutation-mutasaurus
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
+      - name: Set up Node.js
+        uses: actions/setup-node@v5
+        with:
+          node-version: 22
+      - name: Set up Deno
+        uses: denoland/setup-deno@v2
+        with:
+          deno-version: 2.7.6
+      - name: Install StrykerJS
+        run: npm install --no-save --no-package-lock @stryker-mutator/core
+      - name: Run StrykerJS
+        run: |
+          touch persist.dat
+          npx --no-install stryker run mutation/stryker.config.json
+          node mutation/stryker_check.js

.serena/memories/project/overview.md

@@ -4,10 +4,10 @@
 Fast, lightweight, persistence-optional FIFO queue service written in TypeScript for Deno. Provides HTTP API for enqueue, dequeue, length, peek, queues list, and health check endpoints.
 
 ## Tech Stack
-- **Runtime**: Deno 2.7.6 (critical - must match CI image)
+- **Runtime**: Deno 2.7.6 (critical - must match the GitHub Actions workflow)
 - **Language**: TypeScript
 - **Imports**: JSR format (e.g. `jsr:@std/cli@1.0/parse-args`)
-- **CI**: CircleCI (image: `denoland/deno:2.7.6`)
+- **CI**: GitHub Actions (`.github/workflows/ci.yml`)
 
 ## Commands
 - **Test**: `deno test --allow-all` (permission flags required for file I/O tests)

.serena/project.yml

@@ -1,41 +1,6 @@
 # the name by which the project can be referenced within Serena/when chatting with the LLM.
 project_name: "queue"
 
-# list of languages for which language servers are started (LSP backend only); choose from:
-#   ada                 al                  angular             ansible             bash
-#   bsl                 clojure             cpp                 cpp_ccls            crystal
-#   csharp              csharp_omnisharp    cue                 dart                elixir
-#   elm                 erlang              fortran             fsharp              gdscript
-#   go                  groovy              haskell             haxe                hlsl
-#   html                java                json                julia               kotlin
-#   latex               lean4               lua                 luau                markdown
-#   matlab              msl                 nix                 ocaml               pascal
-#   perl                php                 php_phpactor        php_phpantom        powershell
-#   python              python_jedi         python_pyrefly      python_ty           r
-#   rego                ruby                ruby_solargraph     rust                scala
-#   scss                solidity            svelte              swift               systemverilog
-#   terraform           toml                typescript          typescript_vts      vue
-#   yaml                zig
-#   (This list may be outdated; generated with scripts/print_language_list.py;
-#   For the current list, see values of Language enum here:
-#   https://github.com/oraios/serena/blob/main/src/solidlsp/ls_config.py)
-# For some languages, there are alternative language servers, e.g. csharp_omnisharp, ruby_solargraph.)
-# Note:
-#   - For C, use cpp
-#   - For JavaScript, use typescript
-#   - For Angular projects, use angular (subsumes typescript+html; requires `npm install` in the project root)
-#   - For Svelte projects, use svelte (subsumes typescript/javascript for .svelte projects; requires npm)
-#   - For SCSS / Sass / plain CSS, use scss (some-sass-language-server handles all three)
-#   - For Free Pascal/Lazarus, use pascal
-# Special requirements:
-#   Some languages require additional setup/installations.
-#   See here for details: https://oraios.github.io/serena/01-about/020_programming-languages.html#language-servers
-# When using multiple languages, the first language server that supports a given file will be used for that file.
-# The first language is the default language and the respective language server will be used as a fallback.
-# Note that when using the JetBrains backend, language servers are not used and this list is correspondingly ignored.
-languages:
-- typescript
-
 # the encoding used by text files in the project
 # For a list of possible encodings, see https://docs.python.org/3.11/library/codecs.html#standard-encodings
 encoding: "utf-8"
@@ -63,6 +28,13 @@ ls_specific_settings: {}
 
 # list of additional paths to ignore in this project.
 # Same syntax as gitignore, so you can use * and **.
+# Important: quote patterns that start with `*`, otherwise YAML treats them as aliases.
+# Example:
+#   ignored_paths:
+#     - "examples/**"
+#     - ".worktrees/**"
+#     - "**/bin/**"
+#     - "**/obj/**"
 # Note: global ignored_paths from serena_config.yml are also applied additively.
 ignored_paths: []
 
@@ -158,3 +130,38 @@ ls_additional_workspace_folders: []
 #     - "./subproject2"
 ls_workspace_folders:
 - .
+
+# list of language servers to start when using the LSP backend; choose from:
+#   ada                 al                  angular             ansible             bash
+#   bsl                 clojure             cpp                 cpp_ccls            crystal
+#   csharp              csharp_omnisharp    cue                 dart                elixir
+#   elm                 erlang              fortran             fsharp              gdscript
+#   go                  groovy              haskell             haxe                hlsl
+#   html                java                json                julia               kotlin
+#   latex               lean4               lua                 luau                markdown
+#   matlab              msl                 nix                 ocaml               pascal
+#   perl                php                 php_phpactor        php_phpantom        powershell
+#   python              python_jedi         python_pyrefly      python_ty           r
+#   rego                ruby                ruby_solargraph     rust                scala
+#   scss                solidity            svelte              swift               systemverilog
+#   terraform           toml                typescript          typescript_vts      vue
+#   yaml                zig
+#   (This list may be outdated; generated with scripts/print_language_list.py;
+#   For the current list, see values of Language enum here:
+#   https://github.com/oraios/serena/blob/main/src/solidlsp/ls_config.py)
+# For some languages, there are several alternative language servers, e.g. csharp_omnisharp, ruby_solargraph.)
+# Note:
+#   - For C, use cpp
+#   - For JavaScript, use typescript
+#   - For Angular projects, use angular (subsumes typescript+html; requires `npm install` in the project root)
+#   - For Svelte projects, use svelte (subsumes typescript/javascript for .svelte projects; requires npm)
+#   - For SCSS / Sass / plain CSS, use scss (some-sass-language-server handles all three)
+#   - For Free Pascal/Lazarus, use pascal
+# Special requirements:
+#   Some language servers require additional setup/installations.
+#   See here for details: https://oraios.github.io/serena/01-about/020_programming-languages.html#language-servers
+# When using multiple language servers, the first language server that supports a given file will be used for that file.
+# The first language server is the default language and the respective language server will be used as a fallback.
+# Note that when using the JetBrains backend, language servers are not used and this list is correspondingly ignored.
+language_servers:
+- typescript

AGENTS.md

@@ -14,15 +14,16 @@ and respect .serena as integral project tooling
 
 **Main branch requires Deno 2.7.6**
 
-### CircleCI Configuration
+### GitHub Actions Configuration
 
-The `.circleci/config.yml` must match the Deno version:
+The `.github/workflows/ci.yml` must match the Deno version:
 ```yaml
-docker:
-  - image: denoland/deno:2.7.6
+uses: denoland/setup-deno@v2
+with:
+  deno-version: 2.7.6
 ```
 
-**If you upgrade Deno, ALWAYS update this image or CI will fail.**
+**If you upgrade Deno, ALWAYS update this workflow or CI will fail.**
 
 ### Standard Library Imports
 
@@ -57,7 +58,7 @@ Test HTTP handler behaviour with real requests, not internal implementation deta
 
 ## Common Diagnostics
 
-**CircleCI fails?** Check: (1) CircleCI Deno version matches code (2) Import format (jsr: vs deno.land) (3) Using Deno 2.x-only APIs
+**GitHub Actions fails?** Check: (1) workflow Deno version matches code (2) Import format (jsr: vs deno.land) (3) Using Deno 2.x-only APIs
 
 **Merge blocked?** `gh api repos/jonbaldie/queue/branches/main/protection --jq '.enforce_admins.enabled'` — if true, disable with DELETE before merging with --admin
 

README.md

@@ -2,7 +2,7 @@
 
 Fast, portable queue server written in Typescript and built with Deno.
 
-[![CircleCI](https://circleci.com/gh/jonbaldie/queue/tree/main.svg?style=shield)](https://circleci.com/gh/jonbaldie/queue/tree/main)
+[![CI](https://github.com/jonbaldie/queue/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/jonbaldie/queue/actions/workflows/ci.yml)
 
 ## Introduction