From 2a28082be33a1af149b83fea461991490ba6aa14 Mon Sep 17 00:00:00 2001
From: Louis Mandel <lmandel@us.ibm.com>
Date: Thu, 13 Mar 2025 16:27:01 -0400
Subject: [PATCH] Use `${ pdl_context }` as default value for the `input` field
 of a model block

---
 pdl-live-react/src/pdl_ast.d.ts | 42 ++++++++++++++++-----------------
 src/pdl/pdl-schema.json         |  4 ++--
 src/pdl/pdl_ast.py              |  2 +-
 3 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/pdl-live-react/src/pdl_ast.d.ts b/pdl-live-react/src/pdl_ast.d.ts
index aec521f7e..76d178137 100644
--- a/pdl-live-react/src/pdl_ast.d.ts
+++ b/pdl-live-react/src/pdl_ast.d.ts
@@ -140,7 +140,9 @@ export type Description19 = string | null
  */
 export type Def = string | null
 export type ContributeTarget = "result" | "context"
-export type Value = unknown[]
+export type Value = unknown[] | string | LocalizedExpression
+export type Path = string[]
+export type File = string
 /**
  * Indicate if the block contributes to the result and background context.
  *
@@ -243,8 +245,6 @@ export type Context =
  *
  */
 export type PdlId = string | null
-export type Path = string[]
-export type File = string
 export type StartNanos = number | null
 export type EndNanos = number | null
 export type FirstUseNanos = number | null
@@ -3821,6 +3821,24 @@ export interface Defs19 {
 export interface ContributeValue {
   value: Value
 }
+export interface LocalizedExpression {
+  expr: Expr
+  pdl__location?: PdlLocationType | null
+}
+export interface Expr {
+  [k: string]: unknown
+}
+/**
+ * Internal data structure to keep track of the source location information.
+ */
+export interface PdlLocationType {
+  path: Path
+  file: File
+  table: Table
+}
+export interface Table {
+  [k: string]: number
+}
 export interface PdlParser {
   description?: Description20
   spec?: Spec20
@@ -3835,17 +3853,6 @@ export interface RegexParser {
   regex: Regex
   mode?: Mode
 }
-/**
- * Internal data structure to keep track of the source location information.
- */
-export interface PdlLocationType {
-  path: Path
-  file: File
-  table: Table
-}
-export interface Table {
-  [k: string]: number
-}
 /**
  * Internal data structure to record timing information in the trace.
  */
@@ -3855,13 +3862,6 @@ export interface PdlTiming {
   first_use_nanos?: FirstUseNanos
   timezone?: Timezone
 }
-export interface LocalizedExpression {
-  expr: Expr
-  pdl__location?: PdlLocationType | null
-}
-export interface Expr {
-  [k: string]: unknown
-}
 export interface JoinText {
   as?: As
   with?: With
diff --git a/src/pdl/pdl-schema.json b/src/pdl/pdl-schema.json
index a8dac644d..cd3575d98 100644
--- a/src/pdl/pdl-schema.json
+++ b/src/pdl/pdl-schema.json
@@ -3766,7 +3766,7 @@
               "type": "null"
             }
           ],
-          "default": null,
+          "default": "${ pdl_context }",
           "description": "Messages to send to the model.\n    ",
           "title": "Input"
         },
@@ -6237,7 +6237,7 @@
               "type": "null"
             }
           ],
-          "default": null,
+          "default": "${ pdl_context }",
           "description": "Messages to send to the model.\n    ",
           "title": "Input"
         },
diff --git a/src/pdl/pdl_ast.py b/src/pdl/pdl_ast.py
index c11a7d5f9..eb19acab9 100644
--- a/src/pdl/pdl_ast.py
+++ b/src/pdl/pdl_ast.py
@@ -388,7 +388,7 @@ class ModelBlock(LeafBlock):
     model: ExpressionType
     """Model to use.
     """
-    input: Optional["BlockType"] = None
+    input: "BlockType" = "${ pdl_context }"
     """Messages to send to the model.
     """
     modelResponse: Optional[str] = None