diff --git a/agora-spec/Spec/AuthorityToken.hs b/agora-spec/Spec/AuthorityToken.hs
index 1ff3de2..2c28b96 100644
--- a/agora-spec/Spec/AuthorityToken.hs
+++ b/agora-spec/Spec/AuthorityToken.hs
@@ -32,7 +32,7 @@ import Plutus.V1.Ledger.Api (
 import Plutus.V1.Ledger.Interval qualified as Interval
 import Plutus.V1.Ledger.Value qualified as Value
 import PlutusTx.AssocMap qualified as AssocMap
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   group,
   scriptFails,
diff --git a/agora-spec/Spec/Effect/GovernorMutation.hs b/agora-spec/Spec/Effect/GovernorMutation.hs
index 67cf59e..d38d382 100644
--- a/agora-spec/Spec/Effect/GovernorMutation.hs
+++ b/agora-spec/Spec/Effect/GovernorMutation.hs
@@ -15,7 +15,7 @@ import Sample.Effect.GovernorMutation (
   validNewGovernorDatum,
  )
 import Sample.Shared qualified as Shared
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   effectFailsWith,
   effectSucceedsWith,
diff --git a/agora-spec/Spec/Effect/TreasuryWithdrawal.hs b/agora-spec/Spec/Effect/TreasuryWithdrawal.hs
index 9a6a485..f46808d 100644
--- a/agora-spec/Spec/Effect/TreasuryWithdrawal.hs
+++ b/agora-spec/Spec/Effect/TreasuryWithdrawal.hs
@@ -25,7 +25,7 @@ import Sample.Effect.TreasuryWithdrawal (
   treasuries,
   users,
  )
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   effectFailsWith,
   effectSucceedsWith,
diff --git a/agora-spec/Spec/Governor.hs b/agora-spec/Spec/Governor.hs
index 3cbcb57..214b4d3 100644
--- a/agora-spec/Spec/Governor.hs
+++ b/agora-spec/Spec/Governor.hs
@@ -19,7 +19,7 @@ import Agora.Proposal (ProposalId (..))
 import Data.Default.Class (Default (def))
 import Sample.Governor (createProposal, mintGATs, mintGST, mutateState)
 import Sample.Shared qualified as Shared
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   group,
   policySucceedsWith,
diff --git a/agora-spec/Spec/Proposal.hs b/agora-spec/Spec/Proposal.hs
index c57fb78..d4c6426 100644
--- a/agora-spec/Spec/Proposal.hs
+++ b/agora-spec/Spec/Proposal.hs
@@ -45,7 +45,7 @@ import PlutusTx.AssocMap qualified as AssocMap
 import Sample.Proposal qualified as Proposal
 import Sample.Shared (signer, signer2)
 import Sample.Shared qualified as Shared
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   group,
   policySucceedsWith,
diff --git a/agora-spec/Spec/Spec.hs b/agora-spec/Spec/Specification.hs
similarity index 72%
rename from agora-spec/Spec/Spec.hs
rename to agora-spec/Spec/Specification.hs
index f7dc14a..37b512b 100644
--- a/agora-spec/Spec/Spec.hs
+++ b/agora-spec/Spec/Specification.hs
@@ -1,11 +1,39 @@
-module Spec.Spec (
+{- |
+Module     : Spec.Specification
+Maintainer : seungheon.ooh@gmail.com
+Description: Helpers to build Specification for testing and bench-marking
+
+Constructors for building a specification for Plutarch scripts:
+
+  - 'policySucceedsWith': checks that a minting policy succeeds.
+
+  - 'policyFailsWith': checks that a minting policy fails.
+
+  - 'validatorSucceedsWith': checks that validator succeeds.
+
+  - 'validatorFailsWith': checks that validator fails.
+
+  - 'effectSucceedsWith': checks that effect succeeds.
+
+  - 'effectFailsWith': checks that effect fails.
+
+  - 'scriptSucceeds': checks that an arbitrary script does not
+    `perror`.
+
+  - 'scriptFails': checks that an arbitrary script `perror`s out.
+-}
+module Spec.Specification (
+  -- * Structures
   Specification (..),
   SpecificationExpectation (..),
   SpecificationTree (..),
+
+  -- * Spec helpers
   group,
-  toTestTree,
   getSpecification,
   getSpecificationTree,
+
+  -- * Spec builders
   scriptSucceeds,
   scriptFails,
   policySucceedsWith,
@@ -14,6 +42,9 @@ module Spec.Spec (
   validatorFailsWith,
   effectSucceedsWith,
   effectFailsWith,
+
+  -- * Converters
+  toTestTree,
 ) where
 
 import Data.Maybe (catMaybes)
@@ -26,12 +57,20 @@ import PlutusTx.IsData qualified as PlutusTx (ToData)
 import Test.Tasty (TestTree, testGroup)
 import Test.Tasty.HUnit (assertFailure, testCase)
 
+{-| Expectations upon execution of script
+ @Success@ indicates a successful execution.
+ @Failure@ inidcates a faulty execution.
+ @FailureWith@ indicates a faulty execution but with expected reason for failure.
+-}
 data SpecificationExpectation
   = Success
   | Failure
   | FailureWith String
   deriving stock (Show)
 
+{-| Unit of specification. @Specification@ holds name, expectation, and
+  script to be tested or executed later on.
+-}
 data Specification = Specification
   { sName :: String
   , sExpectation :: SpecificationExpectation
@@ -39,20 +78,25 @@ data Specification = Specification
   }
   deriving stock (Show)
 
+-- | Tree-structure to group alike specifications--modeled after @TestTree@ from tasty.
 data SpecificationTree
   = Terminal Specification
   | Group String [SpecificationTree]
   deriving stock (Show)
 
+-- | Checks if given name exists in @SpecificationTree@ as either
+-- group name or specification name.
 exists :: String -> SpecificationTree -> Bool
 exists s (Terminal (Specification name _ _)) = s == name
 exists s (Group name st) = or (exists s <$> st) || s == name
 
+-- | Groups alike @SpecificationTree@s into a bigger tree.
 group :: String -> [SpecificationTree] -> SpecificationTree
 group name st
   | or $ exists name <$> st = error $ "Name already exists: " <> name
   | otherwise = Group name st
 
+-- | Query specific @Specification@ from a tree.
 getSpecification :: String -> SpecificationTree -> Maybe Specification
 getSpecification name (Terminal spec@(Specification sn _ _))
   | name == sn = Just spec
@@ -63,6 +107,7 @@ getSpecification name (Group _ st)
   where
     specs = catMaybes $ getSpecification name <$> st
 
+-- | Query specific @SpecificationTree@ from a tree.
 getSpecificationTree :: String -> SpecificationTree -> Maybe SpecificationTree
 getSpecificationTree name specTree@(Group gn st)
   | gn == name = Just specTree
@@ -72,6 +117,7 @@ getSpecificationTree name specTree@(Group gn st)
     trees = catMaybes $ getSpecificationTree name <$> st
 getSpecificationTree _ _ = Nothing
 
+-- | Convert @SpecificationTree@ into @TestTree@ to be used as a unit test.
 toTestTree :: SpecificationTree -> TestTree
 toTestTree (Group name st) = testGroup name $ toTestTree <$> st
 toTestTree (Terminal (Specification name expectation script)) =
@@ -103,12 +149,15 @@ toTestTree (Terminal (Specification name expectation script)) =
             <> ts
       _ -> pure ()
 
+-- | Check that an arbitrary script doesn't error when evaluated, given a name.
 scriptSucceeds :: String -> Script -> SpecificationTree
 scriptSucceeds name script = Terminal $ Specification name Success script
 
+-- | Check that an arbitrary script **does** error when evaluated, given a name.
 scriptFails :: String -> Script -> SpecificationTree
 scriptFails name script = Terminal $ Specification name Failure script
 
+-- | Check that a policy script succeeds, given a name and arguments.
 policySucceedsWith ::
   ( PLift redeemer
   , PlutusTx.ToData (PLifted redeemer)
@@ -125,7 +174,8 @@ policySucceedsWith tag policy redeemer scriptContext =
           # pforgetData (pconstantData redeemer)
           # pconstant scriptContext
       )
-
+      
+-- | Check that a policy script fails, given a name and arguments.
 policyFailsWith ::
   ( PLift redeemer
   , PlutusTx.ToData (PLifted redeemer)
@@ -142,7 +192,8 @@ policyFailsWith tag policy redeemer scriptContext =
           # pforgetData (pconstantData redeemer)
           # pconstant scriptContext
       )
-
+      
+-- | Check that a validator script succeeds, given a name and arguments.
 validatorSucceedsWith ::
   ( PLift datum
   , PlutusTx.ToData (PLifted datum)
@@ -164,6 +215,7 @@ validatorSucceedsWith tag validator datum redeemer scriptContext =
           # pconstant scriptContext
       )
 
+-- | Check that a validator script fails, given a name and arguments.
 validatorFailsWith ::
   ( PLift datum
   , PlutusTx.ToData (PLifted datum)
@@ -185,6 +237,7 @@ validatorFailsWith tag validator datum redeemer scriptContext =
           # pconstant scriptContext
       )
 
+-- | Check that an effect succeeds, given a name and argument.
 effectSucceedsWith ::
   ( PLift datum
   , PlutusTx.ToData (PLifted datum)
@@ -196,6 +249,7 @@ effectSucceedsWith ::
   SpecificationTree
 effectSucceedsWith tag eff datum = validatorSucceedsWith tag eff datum ()
 
+-- | Check that an effect fails, given a name and argument.
 effectFailsWith ::
   ( PLift datum
   , PlutusTx.ToData (PLifted datum)
diff --git a/agora-spec/Spec/Stake.hs b/agora-spec/Spec/Stake.hs
index 3b1ac09..d48b7d2 100644
--- a/agora-spec/Spec/Stake.hs
+++ b/agora-spec/Spec/Stake.hs
@@ -22,7 +22,7 @@ import Agora.Stake.Scripts (stakePolicy, stakeValidator)
 
 import Sample.Stake (DepositWithdrawExample (DepositWithdrawExample, delta, startAmount), signer)
 import Sample.Stake qualified as Stake
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   group,
   policyFailsWith,
diff --git a/agora-spec/Spec/Treasury.hs b/agora-spec/Spec/Treasury.hs
index 03db77d..7f36e89 100644
--- a/agora-spec/Spec/Treasury.hs
+++ b/agora-spec/Spec/Treasury.hs
@@ -48,7 +48,7 @@ import Sample.Treasury (
   validCtx,
   walletIn,
  )
-import Spec.Spec (
+import Spec.Specification (
   SpecificationTree,
   group,
   validatorFailsWith,
diff --git a/agora-test/Spec.hs b/agora-test/Spec.hs
index 3162fd8..aca4d05 100644
--- a/agora-test/Spec.hs
+++ b/agora-test/Spec.hs
@@ -17,7 +17,7 @@ import Spec.Stake qualified as Stake
 import Spec.Treasury qualified as Treasury
 import Spec.Utils qualified as Utils
 
-import Spec.Spec (group, toTestTree)
+import Spec.Specification (group, toTestTree)
 
 -- | The Agora test suite.
 main :: IO ()
diff --git a/agora.cabal b/agora.cabal
index ec03d58..65ab99c 100644
--- a/agora.cabal
+++ b/agora.cabal
@@ -182,13 +182,13 @@ library agora-sample
 library agora-spec
   import:          lang, deps, test-deps
   exposed-modules:
+    Spec.Specification
     Spec.AuthorityToken
     Spec.Effect.GovernorMutation
     Spec.Effect.TreasuryWithdrawal
     Spec.Governor
     Spec.Model.MultiSig
     Spec.Proposal
-    Spec.Spec
     Spec.Stake
     Spec.Treasury
     Spec.Utils