diff --git a/AGRARIAN_DEVELOPMENT_ROADMAP.md b/AGRARIAN_DEVELOPMENT_ROADMAP.md
index 3c827aa..059e7ef 100644
--- a/AGRARIAN_DEVELOPMENT_ROADMAP.md
+++ b/AGRARIAN_DEVELOPMENT_ROADMAP.md
@@ -885,7 +885,7 @@ Target deliverable: A small group can join a server, spawn into one biome, gathe
 - [x] Design optional knowledge checks that appear when relevant to the action instead of interrupting basic play. Added optional knowledge-check rules to `Docs/KnowledgeAndSkillFoundation.md`, defining inline/skippable presentation, action-relevant timing, calm review moments, non-punitive wrong answers, and the rule that checks deepen understanding without gating the first survival loop.
 - [x] Add player-facing feedback that explains why an action failed or produced poor results. Added failed-action and poor-result feedback rules to `Docs/KnowledgeAndSkillFoundation.md`, requiring short messages that say what happened, name one likely cause, offer one useful next step, avoid blame, and avoid revealing hidden formulas.
 - [x] Define accessibility rules for the learning system: hints, retries, readable wording, no hard lockout from basic survival, and non-punitive practice paths. Added learning accessibility rules to `Docs/KnowledgeAndSkillFoundation.md`, covering reusable hints, retries, readable wording, non-color-only warnings, no lockout from basic survival, safer practice paths, and diminishing returns to prevent exploit loops.
-- [ ] Define the first subject content format: topic, concepts, difficulty tier, prerequisite concepts, in-game effect, practice action, and source note.
+- [x] Define the first subject content format: topic, concepts, difficulty tier, prerequisite concepts, in-game effect, practice action, and source note. Added a compact subject content schema to `Docs/KnowledgeAndSkillFoundation.md` with `topic`, `concepts`, `difficulty_tier`, `prerequisite_concepts`, `in_game_effect`, `practice_action`, and `source_note`, plus a fire-clearance example suitable for later data assets.
 - [ ] Add a small MVP question bank for elementary survival knowledge.
 - [ ] Define when deeper questions should matter: quality improvements, safer work, complex crafting, teaching others, and advanced branches.
 - [ ] Add design notes for avoiding exploit farming and rote memorization.
diff --git a/Docs/KnowledgeAndSkillFoundation.md b/Docs/KnowledgeAndSkillFoundation.md
index 4e489ab..06ec7bb 100644
--- a/Docs/KnowledgeAndSkillFoundation.md
+++ b/Docs/KnowledgeAndSkillFoundation.md
@@ -379,3 +379,35 @@ Non-punitive practice paths:
 
 Accessibility rule: learning should make players more capable without making
 them feel trapped, shamed, or forced into a classroom flow.
+
+## Subject Content Format
+
+Learning content should use a small structured format so topics can become data
+assets later without rewriting design intent.
+
+Required fields:
+
+- `topic`: stable identifier and display name, such as `fire.clearance`.
+- `concepts`: one or more concept tags the player may learn or demonstrate.
+- `difficulty_tier`: `elementary`, `practical`, `advanced`, or `expert`.
+- `prerequisite_concepts`: concept tags that should be known first, if any.
+- `in_game_effect`: the warning, modifier, feedback, unlock, or quality effect
+  this topic can influence.
+- `practice_action`: the action that can build practical experience for the
+  topic.
+- `source_note`: a short design/source note explaining why the topic matters.
+
+Example:
+
+```text
+topic: fire.clearance
+concepts: fire_safety, dry_fuel, wind_spread
+difficulty_tier: elementary
+prerequisite_concepts: none
+in_game_effect: clearer fire-risk warning and lower unsafe-placement mistakes
+practice_action: clear area, contain fire, maintain fire, extinguish fire
+source_note: Open flame near dry fuel and wind can spread beyond the campfire.
+```
+
+Format rule: content records should be small enough to review in source control
+and explicit enough to become data assets later.
diff --git a/Scripts/verify_subject_content_format.py b/Scripts/verify_subject_content_format.py
new file mode 100644
index 0000000..da98f37
--- /dev/null
+++ b/Scripts/verify_subject_content_format.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+"""Verify the first subject content format is documented."""
+
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+DOC = ROOT / "Docs" / "KnowledgeAndSkillFoundation.md"
+ROADMAP = ROOT / "AGRARIAN_DEVELOPMENT_ROADMAP.md"
+
+REQUIRED = {
+    DOC: [
+        "## Subject Content Format",
+        "`topic`",
+        "`concepts`",
+        "`difficulty_tier`",
+        "`prerequisite_concepts`",
+        "`in_game_effect`",
+        "`practice_action`",
+        "`source_note`",
+        "topic: fire.clearance",
+        "Format rule:",
+    ],
+    ROADMAP: [
+        "[x] Define the first subject content format: topic, concepts, difficulty tier, prerequisite concepts, in-game effect, practice action, and source note.",
+    ],
+}
+
+
+def main() -> None:
+    missing: list[str] = []
+    for path, snippets in REQUIRED.items():
+        text = path.read_text(encoding="utf-8")
+        for snippet in snippets:
+            if snippet not in text:
+                missing.append(f"{path.relative_to(ROOT)} missing {snippet!r}")
+    if missing:
+        raise SystemExit("FAILED: " + "; ".join(missing))
+    print("OK: subject content format is documented.")
+
+
+if __name__ == "__main__":
+    main()