feat(core): add logging for original_date parsing and fixed pending contexts using wrong date (#528)

* feat(skill_learner): add logging for original_date parsing

- Log original_date value when extracted from session.configs
- Log date resolution in SkillLearnerPrompt

* feat(schema): add warning log for original_date validation failure

- Log warning when original_date format validation fails
- Include session_id in the log for debugging

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(skill_learner): use each context's own original_date

- Each pending context now uses its own original_date field
  instead of sharing the single date from initial session
- Add Date: header to each context for clarity
- Remove unused original_date parameter from pack_incoming_contexts

Author: mbt1909432

src/server/core/acontext_core/llm/prompt/skill_learner.py

@@ -4,6 +4,7 @@
 from .base import BasePrompt
 from ...schema.llm import ToolSchema
 from ..tool.skill_learner_tools import SKILL_LEARNER_TOOLS
+from ...env import LOG
 
 if TYPE_CHECKING:
     from ...schema.mq.learning import SkillLearnDistilled
@@ -154,6 +155,11 @@ def pack_skill_learner_input(
         original_date: str | None = None,
     ) -> str:
         today = original_date or date.today().isoformat()
+        LOG.info(
+            "skill_learner_prompt.date_resolved",
+            original_date=original_date,
+            today=today,
+        )
         parts = [distilled_context]
 
         if pending_contexts:
@@ -183,15 +189,16 @@ def pack_incoming_contexts(
         count_bases: int = 0,
         original_date: str | None = None,
     ) -> str:
-        today = original_date or date.today().isoformat()
         header = (
             "Additional contexts have arrived while you were working. "
             "Finish your current task first, then process these in order."
         )
         ctx_parts = []
         for i, ctx in enumerate(contexts, 1):
+            # Use each context's own original_date, fall back to today
+            ctx_date = ctx.original_date or date.today().isoformat()
             ctx_parts.append(
-                f"### New Context {i+count_bases}\n{ctx.distilled_context}"
+                f"### New Context {i+count_bases}\nDate: {ctx_date}\n{ctx.distilled_context}"
             )
 
         return f"""{header}
@@ -200,8 +207,6 @@ def pack_incoming_contexts(
 
 ## Available Skills (updated)
 {available_skills_str}
-
-Today's date: {today}
 """
 
     @classmethod

src/server/core/acontext_core/schema/mq/learning.py

@@ -3,6 +3,7 @@
 from typing import Optional
 from pydantic import BaseModel, field_validator
 from ..utils import asUUID
+from ...env import LOG
 
 
 class SkillLearnTask(BaseModel):
@@ -25,10 +26,12 @@ class SkillLearnDistilled(BaseModel):
 
     @field_validator("original_date")
     @classmethod
-    def validate_original_date(cls, v):
+    def validate_original_date(cls, v, info):
         if v is None:
             return v
 
+        session_id = info.data.get("session_id")
+
         # ISO format: YYYY-MM-DD
         try:
             date.fromisoformat(v)
@@ -44,6 +47,13 @@ def validate_original_date(cls, v):
             except ValueError:
                 pass
 
+        # Validation failed - log warning before raising error
+        LOG.warning(
+            "skill_learner.original_date_validation_failed",
+            session_id=str(session_id) if session_id else None,
+            original_date=v,
+        )
+
         raise ValueError(
             "original_date must be 'YYYY-MM-DD' or 'YYYY/MM/DD (Day) HH:MM', "
             f"got: {v!r}"

src/server/core/acontext_core/service/skill_learner.py

@@ -52,6 +52,11 @@ async def process_skill_distillation(body: SkillLearnTask, message: Message):
         original_date = None
         if not eil and session and session.configs:
             original_date = session.configs.get("original_date")
+            LOG.info(
+                "skill_learner.original_date_parsed",
+                session_id=str(body.session_id),
+                original_date=original_date,
+            )
 
     learning_space_id = ls_session.learning_space_id
     wide["learning_space_id"] = str(learning_space_id)