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TitleBrief descriptionTaken byDue on
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Collect & transmit structured log & instrumentation data from Haskell-- Figure out how to buffer structured log data in memory AND flush the buffer upon time/memory, whichever occurs earlier. two options — pipes or broadcast channels.
-- Figure out which interim existing visualisation service can we push the instrumentation data to. need not be a 100% fit for now, but at least something that can get us started. If there is not such existing visualisation service, then we have to write a very basic one on our own in Purescript/Elm.
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Rails cookie decryption in Haskell-- The Haskell app needs to be able to decrypt and understand the Rails auth cookie.
-- It should be able to read the encryption key/salt from config.yml and expose the contents of the cookie in a structured format (record type) in the App environment used by all servant handlers. (this needs to be a per-request environment, NOT an app-wide environment!)
Note: Here's a relevant library which seems to have already implemented the core decryption code - https://github.com/iconnect/rails-session		Saurabh NandaCompleted
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Opaleye generated left join queries seems to slow down the Postgresql's query plannerhttps://github.com/tomjaguarpaw/haskell-opaleye/issues/284
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Opaleye - Multiple left joinshttps://github.com/tomjaguarpaw/haskell-opaleye/issues/237
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Haskell port of Zurb's Inky libraryIdeally something built on top of Lucid (which we are using for regular HTML generation as well). We would like the functions/combinators to be type-safe so that a `column` tag outside a `row` tag is not allowed. A `menu` tag inside a `menu` tag is not allowed. An orphan `item` tag is not allowed, etc.

Link: https://foundation.zurb.com/emails/docs/inky.html		James Haver IIWIP
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TechEmpower benchmarks - YesodFixing the yesod & yesod-postgres code to perform better in the benchmarks.
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TechEmpower benchmarks - ServantFixing the yesod & yesod-postgres code to perform better in the benchmarks.
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ReflexFRP benchmarksBenchmarking GHCJS + Reflex-FRP as per https://github.com/krausest/js-framework-benchmark AlexCompleted
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Purescript benchmarksBenchmarking Purescript + Halogen/Thermite/Pux as per https://github.com/krausest/js-framework-benchmarkThomasCompleted
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DB migrations infraFigure out how to manage DB migrations if we aren't using Persisten (which has some support for migrations baked into the library). Sqitch is a possible alternative.PranayCompleted
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Extensible recordsSurvey of mature (or seemingly mature) libraries that alleviate the records problem in Haskell:

-- Benchmark performance against regular record accessors and lens-accessors
-- Benchmark for compile-time
-- Can the extensible record have duplicate field names?
-- What's the story around nested extensible records? How do you update nested records?
-- Integrate the extensible record with other popular libraries, like Lens, Aeson, Opaleye, and swagger-data
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Miso benchmarksBenchmarking GHCJS + MisoJS as per https://github.com/krausest/js-framework-benchmark SaurabhCompleted
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Haskell deploymentA well-integrated deployment story with hapistrano (or something better):

-- Haproxy setup for A/B deployment
-- New server is deployed on a new port
-- Haproxy config file is changed to point to server deployed on new port
-- Haproxy is sent a soft-restart signal.
-- Once all connections to old server (old port) are terminated, the old server is shut down.
-- DB migrations are run before deployment.
-- Static assets are deployed as well.		Saurabh & RajdeepCompleted
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Structured logging and instrumentationWrappers over popular libraries that log & transmit structured data to a remote service (eg. NewRelic):

-- Opaleye - log the query, the execution time, and number of rows affected
-- Redis -- log the command, exectuation time, and bytes transferred
-- Email -- log the subject, recipient, size of email, and time taken
-- WAI/Servant -- log the request (including JSON payload), resposne HTTP code, error message in case of 500s, time take to respond, breakup of the time by Sql, Redis, Email, HTML rendering, etc.
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Record splicerPranayCompleted
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Opaleye code generatorSaurabhCompleted
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Ability to pretty-print data-structures for debuggingWhile most data structures have a Show instance, they aren't optimised for human readability. Is there a library out there which implements a PrettyPrint instance for most common data-structures that can be used for displaying the data-structure for human reading? Anything based on Generic or generics-sop?
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Haskell deployment - documentationSurvey all available approaches for deploying Haskell webapps and write a detailed tutorial for each approach:

-- Docker
-- Nix
-- Keter
-- Hapistrano
-- Nginx?
-- Heroku		SaurabhCompleted
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Servant <> Typescript bridgeeg. Servant<>Elm bridge
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Lucid from HTMLeg. Blaze from HTML or Miso from HTMLCompleted
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Currency formatting packageThere doesn't seem to be a proper way to format currency values on the lines of http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#method-i-number_to_currency
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Logging JSON request payload in WAI / ServantWai/Warp doesn't seem to have proper support for this. Benchmark the impact of the hack mentioned at https://github.com/yesodweb/wai/issues/636 if enabled in production. If the impact is severly negative, then investigate if this can be done at the Servant level instead.
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Query tracing support for Opaleyehttps://github.com/tomjaguarpaw/haskell-opaleye/issues/312
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Job queues in PostgresExtract and generalise our job-queue infra (tightly coupled with our app right now) so that it can be open-sourced. Will need documentation on how to integrate with any app (especially an app's authentication/authorization infra)SaurabhWIP
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Job queue adminweb interface for basic monitoring and adminstration of the Postgres-backed job queueSaurabhWIP
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Sendgrid APIOpen-source our code for Haskell implementation of Sendgrid API
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Postgresql ORM vs HRRHelp us evaluate Postgresql ORM vs HRR for typical web-app use-casesDropDrop
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DB-heavy testingSetup either HTF or Tasty to run DB-based tests in parallel in isolated transactionsSaurabhWIP
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