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Add haskell-ci generated config, fix cabal warnings #8

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7caf470
Fix -Wunused-dependencies warnings
jhrcek Jan 22, 2026
f6a6770
Add haskell-ci generated github actions config
jhrcek Jan 22, 2026
d8db835
Bump depencency bounds reported by cabal outdated
jhrcek Jan 22, 2026
0e1ae17
Fix cabal check warnings
jhrcek Jan 22, 2026
b1dcc0c
Fix cabal check warnings - part 2
jhrcek Jan 22, 2026
3ceb8c1
Remove not yet working ghc 9.14
jhrcek Jan 22, 2026
e81305f
Fix -Wunused-packages warning in tests
jhrcek Jan 22, 2026
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216 changes: 216 additions & 0 deletions .github/workflows/haskell-ci.yml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,216 @@
# This GitHub workflow config has been generated by a script via
#
# haskell-ci 'github' 'mcp.cabal'
#
# To regenerate the script (for example after adjusting tested-with) run
#
# haskell-ci regenerate
#
# For more information, see https://github.com/haskell-CI/haskell-ci
#
# version: 0.19.20260104
#
# REGENDATA ("0.19.20260104",["github","mcp.cabal"])
#
name: Haskell-CI
on:
- push
- pull_request
- merge_group
jobs:
linux:
name: Haskell-CI - Linux - ${{ matrix.compiler }}
runs-on: ubuntu-24.04
timeout-minutes:
60
container:
image: buildpack-deps:jammy
continue-on-error: ${{ matrix.allow-failure }}
strategy:
matrix:
include:
- compiler: ghc-9.12.2
compilerKind: ghc
compilerVersion: 9.12.2
setup-method: ghcup
allow-failure: false
- compiler: ghc-9.10.3
compilerKind: ghc
compilerVersion: 9.10.3
setup-method: ghcup
allow-failure: false
- compiler: ghc-9.8.4
compilerKind: ghc
compilerVersion: 9.8.4
setup-method: ghcup
allow-failure: false
- compiler: ghc-9.6.7
compilerKind: ghc
compilerVersion: 9.6.7
setup-method: ghcup
allow-failure: false
fail-fast: false
steps:
- name: apt-get install
run: |
apt-get update
apt-get install -y --no-install-recommends gnupg ca-certificates dirmngr curl git software-properties-common libtinfo5
- name: Install GHCup
run: |
mkdir -p "$HOME/.ghcup/bin"
curl -sL https://downloads.haskell.org/ghcup/0.1.50.1/x86_64-linux-ghcup-0.1.50.1 > "$HOME/.ghcup/bin/ghcup"
chmod a+x "$HOME/.ghcup/bin/ghcup"
- name: Install cabal-install
run: |
"$HOME/.ghcup/bin/ghcup" install cabal 3.16.0.0 || (cat "$HOME"/.ghcup/logs/*.* && false)
echo "CABAL=$HOME/.ghcup/bin/cabal-3.16.0.0 -vnormal+nowrap" >> "$GITHUB_ENV"
- name: Install GHC (GHCup)
if: matrix.setup-method == 'ghcup'
run: |
"$HOME/.ghcup/bin/ghcup" install ghc "$HCVER" || (cat "$HOME"/.ghcup/logs/*.* && false)
HC=$("$HOME/.ghcup/bin/ghcup" whereis ghc "$HCVER")
HCPKG=$(echo "$HC" | sed 's#ghc$#ghc-pkg#')
HADDOCK=$(echo "$HC" | sed 's#ghc$#haddock#')
echo "HC=$HC" >> "$GITHUB_ENV"
echo "HCPKG=$HCPKG" >> "$GITHUB_ENV"
echo "HADDOCK=$HADDOCK" >> "$GITHUB_ENV"
env:
HCKIND: ${{ matrix.compilerKind }}
HCNAME: ${{ matrix.compiler }}
HCVER: ${{ matrix.compilerVersion }}
- name: Set PATH and environment variables
run: |
echo "$HOME/.cabal/bin" >> $GITHUB_PATH
echo "LANG=C.UTF-8" >> "$GITHUB_ENV"
echo "CABAL_DIR=$HOME/.cabal" >> "$GITHUB_ENV"
echo "CABAL_CONFIG=$HOME/.cabal/config" >> "$GITHUB_ENV"
HCNUMVER=$(${HC} --numeric-version|perl -ne '/^(\d+)\.(\d+)\.(\d+)(\.(\d+))?$/; print(10000 * $1 + 100 * $2 + ($3 == 0 ? $5 != 1 : $3))')
echo "HCNUMVER=$HCNUMVER" >> "$GITHUB_ENV"
echo "ARG_TESTS=--enable-tests" >> "$GITHUB_ENV"
echo "ARG_BENCH=--enable-benchmarks" >> "$GITHUB_ENV"
echo "HEADHACKAGE=false" >> "$GITHUB_ENV"
echo "ARG_COMPILER=--$HCKIND --with-compiler=$HC" >> "$GITHUB_ENV"
env:
HCKIND: ${{ matrix.compilerKind }}
HCNAME: ${{ matrix.compiler }}
HCVER: ${{ matrix.compilerVersion }}
- name: env
run: |
env
- name: write cabal config
run: |
mkdir -p $CABAL_DIR
cat >> $CABAL_CONFIG <<EOF
remote-build-reporting: anonymous
write-ghc-environment-files: never
remote-repo-cache: $CABAL_DIR/packages
logs-dir: $CABAL_DIR/logs
world-file: $CABAL_DIR/world
extra-prog-path: $CABAL_DIR/bin
symlink-bindir: $CABAL_DIR/bin
installdir: $CABAL_DIR/bin
build-summary: $CABAL_DIR/logs/build.log
store-dir: $CABAL_DIR/store
install-dirs user
prefix: $CABAL_DIR
repository hackage.haskell.org
url: http://hackage.haskell.org/
EOF
cat >> $CABAL_CONFIG <<EOF
program-default-options
ghc-options: $GHCJOBS +RTS -M3G -RTS
EOF
cat $CABAL_CONFIG
- name: versions
run: |
$HC --version || true
$HC --print-project-git-commit-id || true
$CABAL --version || true
- name: update cabal index
run: |
$CABAL v2-update -v
- name: install cabal-plan
run: |
mkdir -p $HOME/.cabal/bin
curl -sL https://github.com/haskell-hvr/cabal-plan/releases/download/v0.7.3.0/cabal-plan-0.7.3.0-x86_64-linux.xz > cabal-plan.xz
echo 'f62ccb2971567a5f638f2005ad3173dba14693a45154c1508645c52289714cb2 cabal-plan.xz' | sha256sum -c -
xz -d < cabal-plan.xz > $HOME/.cabal/bin/cabal-plan
rm -f cabal-plan.xz
chmod a+x $HOME/.cabal/bin/cabal-plan
cabal-plan --version
- name: checkout
uses: actions/checkout@v5
with:
path: source
- name: initial cabal.project for sdist
run: |
touch cabal.project
echo "packages: $GITHUB_WORKSPACE/source/." >> cabal.project
cat cabal.project
- name: sdist
run: |
mkdir -p sdist
$CABAL sdist all --output-dir $GITHUB_WORKSPACE/sdist
- name: unpack
run: |
mkdir -p unpacked
find sdist -maxdepth 1 -type f -name '*.tar.gz' -exec tar -C $GITHUB_WORKSPACE/unpacked -xzvf {} \;
- name: generate cabal.project
run: |
PKGDIR_mcp="$(find "$GITHUB_WORKSPACE/unpacked" -maxdepth 1 -type d -regex '.*/mcp-[0-9.]*')"
echo "PKGDIR_mcp=${PKGDIR_mcp}" >> "$GITHUB_ENV"
rm -f cabal.project cabal.project.local
touch cabal.project
touch cabal.project.local
echo "packages: ${PKGDIR_mcp}" >> cabal.project
echo "package mcp" >> cabal.project
echo " ghc-options: -Werror=missing-methods -Werror=missing-fields" >> cabal.project
echo "package mcp" >> cabal.project
echo " ghc-options: -Werror=unused-packages" >> cabal.project
echo "package mcp" >> cabal.project
echo " ghc-options: -Werror=incomplete-patterns -Werror=incomplete-uni-patterns" >> cabal.project
cat >> cabal.project <<EOF
EOF
$HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: any.$_ installed\n" unless /^(mcp)$/; }' >> cabal.project.local
cat cabal.project
cat cabal.project.local
- name: dump install plan
run: |
$CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dry-run all
cabal-plan
- name: restore cache
uses: actions/cache/restore@v4
with:
key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
path: ~/.cabal/store
restore-keys: ${{ runner.os }}-${{ matrix.compiler }}-
- name: install dependencies
run: |
$CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --dependencies-only -j2 all
$CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH --dependencies-only -j2 all
- name: build w/o tests
run: |
$CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
- name: build
run: |
$CABAL v2-build $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --write-ghc-environment-files=always
- name: tests
run: |
$CABAL v2-test $ARG_COMPILER $ARG_TESTS $ARG_BENCH all --test-show-details=direct
- name: cabal check
run: |
cd ${PKGDIR_mcp} || false
${CABAL} -vnormal check
- name: haddock
run: |
$CABAL v2-haddock --disable-documentation --haddock-all $ARG_COMPILER --with-haddock $HADDOCK $ARG_TESTS $ARG_BENCH all
- name: unconstrained build
run: |
rm -f cabal.project.local
$CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks all
- name: save cache
if: always()
uses: actions/cache/save@v4
with:
key: ${{ runner.os }}-${{ matrix.compiler }}-${{ github.sha }}
path: ~/.cabal/store
92 changes: 41 additions & 51 deletions mcp.cabal
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Expand Up @@ -26,20 +26,20 @@ version: 0.3.0.0
synopsis: A Haskell implementation of the Model Context Protocol (MCP)

-- A longer description of the package.
description:
description:
This library provides a complete implementation of the Model Context Protocol (MCP)
for Haskell. MCP is a protocol that enables seamless communication between AI models
and external tools, resources, and services. This implementation supports the latest
MCP protocol version (2025-06-18) with full compatibility for resources, tools,
prompts, and all standard MCP message types. It provides both a server framework
MCP protocol version (2025-06-18) with full compatibility for resources, tools,
prompts, and all standard MCP message types. It provides both a server framework
and type definitions for building MCP-compliant applications.

Features dual transport support:

* StdIO transport for process-based clients (e.g., Claude Desktop)
* HTTP transport following the official MCP specification for web-based integration,
and supports OAuth authentication.

Both transports use the same MCPServer typeclass, allowing seamless switching between
communication methods while maintaining identical server logic.

Expand Down Expand Up @@ -68,8 +68,15 @@ extra-source-files:
schema.ts
examples/README.md
examples/http-server.hs
examples/stdio-server.hs
examples/cursor-config-examples.json
examples/claude-desktop-config.json
examples/full-config-example.json
examples/claude-desktop-full-config.json

tested-with: GHC == 9.6.7
|| == 9.8.4
|| == 9.10.3
|| == 9.12.2

homepage: https://github.com/Tritlo/mcp

Expand All @@ -78,16 +85,16 @@ source-repository head
location: https://github.com/Tritlo/mcp.git

common warnings
ghc-options: -Wall
ghc-options: -Wall -Wunused-packages

library
-- Import common warning flags.
import: warnings

-- Modules exported by the library.
exposed-modules:
exposed-modules:
MCP.Types
MCP.Protocol
MCP.Protocol
MCP.Server
MCP.Server.StdIO
MCP.Server.HTTP
Expand All @@ -100,34 +107,29 @@ library
-- other-extensions:

-- Other library packages from which modules are imported.
build-depends:
base >= 4.18.2.1 && <= 4.21.0.0,
build-depends:
base >= 4.18.2.1 && < 4.23,
aeson >= 2.1 && < 2.3,
text >= 2.0 && <= 2.1.2,
containers >= 0.6 && < 0.7,
bytestring >= 0.11 && < 0.12,
unordered-containers >= 0.2 && < 0.3,
text >= 2.0 && < 2.1.4,
containers >= 0.6 && < 0.9,
bytestring >= 0.11 && < 0.13,
stm >= 2.5 && < 2.6,
async >= 2.2 && < 2.3,
mtl >= 2.3 && < 2.4,
transformers >= 0.6 && < 0.7,
warp >= 3.3 && < 3.4,
warp >= 3.3 && < 3.5,
wai >= 3.2 && < 3.3,
wai-extra >= 3.1 && < 3.2,
servant-server >= 0.19 && < 0.21,
servant >= 0.19 && < 0.21,
http-types >= 0.12 && < 0.13,
servant-auth >= 0.4 && < 0.5,
servant-auth-server >= 0.4 && < 0.5,
jose >= 0.10 && < 0.12,
jose >= 0.10 && < 0.13,
cryptonite >= 0.30 && < 0.31,
memory >= 0.18 && < 0.19,
memory >= 0.18 && < 0.20,
base64-bytestring >= 1.2 && < 1.3,
http-conduit >= 2.3 && < 2.4,
random >= 1.2 && < 1.3,
time >= 1.12 && < 1.13,
random >= 1.2 && < 1.4,
time >= 1.12 && < 1.16,
uuid >= 1.3 && < 1.4,
data-default >= 0.7 && < 0.8
data-default >= 0.7 && < 0.9

-- Directories containing source files.
hs-source-dirs: src
Expand All @@ -150,14 +152,10 @@ executable mcp

-- Other library packages from which modules are imported.
build-depends:
base >= 4.18.2.1 && <= 4.21.0.0,
base >= 4.18.2.1 && < 4.23,
mcp,
aeson >= 2.1 && < 2.3,
text >= 2.0 && <= 2.1.2,
containers >= 0.6 && < 0.7,
scientific >= 0.3 && < 0.4,
time >= 1.12 && < 1.13,
data-default >= 0.7 && < 0.8
text >= 2.0 && < 2.1.4,
time >= 1.12 && < 1.16,

-- Directories containing source files.
hs-source-dirs: app
Expand All @@ -181,15 +179,11 @@ executable mcp-http

-- Other library packages from which modules are imported.
build-depends:
base >= 4.18.2.1 && <= 4.21.0.0,
base >= 4.18.2.1 && < 4.23,
mcp,
aeson >= 2.1 && < 2.3,
text >= 2.0 && <= 2.1.2,
containers >= 0.6 && < 0.7,
scientific >= 0.3 && < 0.4,
time >= 1.12 && < 1.13,
optparse-applicative >= 0.17 && < 0.19,
data-default >= 0.7 && < 0.8
text >= 2.0 && < 2.1.4,
time >= 1.12 && < 1.16,
optparse-applicative >= 0.17 && < 0.20

-- Directories containing source files.
hs-source-dirs: examples
Expand All @@ -213,15 +207,11 @@ executable mcp-stdio

-- Other library packages from which modules are imported.
build-depends:
base >= 4.18.2.1 && <= 4.21.0.0,
base >= 4.18.2.1 && < 4.23,
mcp,
aeson >= 2.1 && < 2.3,
text >= 2.0 && <= 2.1.2,
containers >= 0.6 && < 0.7,
scientific >= 0.3 && < 0.4,
time >= 1.12 && < 1.13,
optparse-applicative >= 0.17 && < 0.19,
data-default >= 0.7 && < 0.8
text >= 2.0 && < 2.1.4,
time >= 1.12 && < 1.16,
optparse-applicative >= 0.17 && < 0.20,

-- Directories containing source files.
hs-source-dirs: examples
Expand Down Expand Up @@ -254,5 +244,5 @@ test-suite mcp-test

-- Test dependencies.
build-depends:
base >= 4.18.2.1 && <= 4.21.0.0,
mcp
base >= 4.18.2.1 && < 4.23,
-- mcp